gsasl 0.3.2 → 0.3.3

raw patch · 7 files changed

+1691/−1674 lines, 7 filesdep ~basePVP ok

version bump matches the API change (PVP)

Dependency ranges changed: base

API changes (from Hackage documentation)

Files

• License.txt +0/−674
• Network/Protocol/SASL/GNU.hs +0/−971
• cbits/hsgsasl-shim.c +13/−0
• gsasl.cabal +24/−16
• hsgsasl-shim.c +0/−13
• lib/Network/Protocol/SASL/GNU.hs +980/−0
• license.txt +674/−0

@@ -1,674 +0,0 @@-                    GNU GENERAL PUBLIC LICENSE-                       Version 3, 29 June 2007-- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>- Everyone is permitted to copy and distribute verbatim copies- of this license document, but changing it is not allowed.--                            Preamble--  The GNU General Public License is a free, copyleft license for-software and other kinds of works.--  The licenses for most software and other practical works are designed-to take away your freedom to share and change the works.  By contrast,-the GNU General Public License is intended to guarantee your freedom to-share and change all versions of a program--to make sure it remains free-software for all its users.  We, the Free Software Foundation, use the-GNU General Public License for most of our software; it applies also to-any other work released this way by its authors.  You can apply it to-your programs, too.--  When we speak of free software, we are referring to freedom, not-price.  Our General Public Licenses are designed to make sure that you-have the freedom to distribute copies of free software (and charge for-them if you wish), that you receive source code or can get it if you-want it, that you can change the software or use pieces of it in new-free programs, and that you know you can do these things.--  To protect your rights, we need to prevent others from denying you-these rights or asking you to surrender the rights.  Therefore, you have-certain responsibilities if you distribute copies of the software, or if-you modify it: responsibilities to respect the freedom of others.--  For example, if you distribute copies of such a program, whether-gratis or for a fee, you must pass on to the recipients the same-freedoms that you received.  You must make sure that they, too, receive-or can get the source code.  And you must show them these terms so they-know their rights.--  Developers that use the GNU GPL protect your rights with two steps:-(1) assert copyright on the software, and (2) offer you this License-giving you legal permission to copy, distribute and/or modify it.--  For the developers' and authors' protection, the GPL clearly explains-that there is no warranty for this free software.  For both users' and-authors' sake, the GPL requires that modified versions be marked as-changed, so that their problems will not be attributed erroneously to-authors of previous versions.--  Some devices are designed to deny users access to install or run-modified versions of the software inside them, although the manufacturer-can do so.  This is fundamentally incompatible with the aim of-protecting users' freedom to change the software.  The systematic-pattern of such abuse occurs in the area of products for individuals to-use, which is precisely where it is most unacceptable.  Therefore, we-have designed this version of the GPL to prohibit the practice for those-products.  If such problems arise substantially in other domains, we-stand ready to extend this provision to those domains in future versions-of the GPL, as needed to protect the freedom of users.--  Finally, every program is threatened constantly by software patents.-States should not allow patents to restrict development and use of-software on general-purpose computers, but in those that do, we wish to-avoid the special danger that patents applied to a free program could-make it effectively proprietary.  To prevent this, the GPL assures that-patents cannot be used to render the program non-free.--  The precise terms and conditions for copying, distribution and-modification follow.--                       TERMS AND CONDITIONS--  0. Definitions.--  "This License" refers to version 3 of the GNU General Public License.--  "Copyright" also means copyright-like laws that apply to other kinds of-works, such as semiconductor masks.--  "The Program" refers to any copyrightable work licensed under this-License.  Each licensee is addressed as "you".  "Licensees" and-"recipients" may be individuals or organizations.--  To "modify" a work means to copy from or adapt all or part of the work-in a fashion requiring copyright permission, other than the making of an-exact copy.  The resulting work is called a "modified version" of the-earlier work or a work "based on" the earlier work.--  A "covered work" means either the unmodified Program or a work based-on the Program.--  To "propagate" a work means to do anything with it that, without-permission, would make you directly or secondarily liable for-infringement under applicable copyright law, except executing it on a-computer or modifying a private copy.  Propagation includes copying,-distribution (with or without modification), making available to the-public, and in some countries other activities as well.--  To "convey" a work means any kind of propagation that enables other-parties to make or receive copies.  Mere interaction with a user through-a computer network, with no transfer of a copy, is not conveying.--  An interactive user interface displays "Appropriate Legal Notices"-to the extent that it includes a convenient and prominently visible-feature that (1) displays an appropriate copyright notice, and (2)-tells the user that there is no warranty for the work (except to the-extent that warranties are provided), that licensees may convey the-work under this License, and how to view a copy of this License.  If-the interface presents a list of user commands or options, such as a-menu, a prominent item in the list meets this criterion.--  1. Source Code.--  The "source code" for a work means the preferred form of the work-for making modifications to it.  "Object code" means any non-source-form of a work.--  A "Standard Interface" means an interface that either is an official-standard defined by a recognized standards body, or, in the case of-interfaces specified for a particular programming language, one that-is widely used among developers working in that language.--  The "System Libraries" of an executable work include anything, other-than the work as a whole, that (a) is included in the normal form of-packaging a Major Component, but which is not part of that Major-Component, and (b) serves only to enable use of the work with that-Major Component, or to implement a Standard Interface for which an-implementation is available to the public in source code form.  A-"Major Component", in this context, means a major essential component-(kernel, window system, and so on) of the specific operating system-(if any) on which the executable work runs, or a compiler used to-produce the work, or an object code interpreter used to run it.--  The "Corresponding Source" for a work in object code form means all-the source code needed to generate, install, and (for an executable-work) run the object code and to modify the work, including scripts to-control those activities.  However, it does not include the work's-System Libraries, or general-purpose tools or generally available free-programs which are used unmodified in performing those activities but-which are not part of the work.  For example, Corresponding Source-includes interface definition files associated with source files for-the work, and the source code for shared libraries and dynamically-linked subprograms that the work is specifically designed to require,-such as by intimate data communication or control flow between those-subprograms and other parts of the work.--  The Corresponding Source need not include anything that users-can regenerate automatically from other parts of the Corresponding-Source.--  The Corresponding Source for a work in source code form is that-same work.--  2. Basic Permissions.--  All rights granted under this License are granted for the term of-copyright on the Program, and are irrevocable provided the stated-conditions are met.  This License explicitly affirms your unlimited-permission to run the unmodified Program.  The output from running a-covered work is covered by this License only if the output, given its-content, constitutes a covered work.  This License acknowledges your-rights of fair use or other equivalent, as provided by copyright law.--  You may make, run and propagate covered works that you do not-convey, without conditions so long as your license otherwise remains-in force.  You may convey covered works to others for the sole purpose-of having them make modifications exclusively for you, or provide you-with facilities for running those works, provided that you comply with-the terms of this License in conveying all material for which you do-not control copyright.  Those thus making or running the covered works-for you must do so exclusively on your behalf, under your direction-and control, on terms that prohibit them from making any copies of-your copyrighted material outside their relationship with you.--  Conveying under any other circumstances is permitted solely under-the conditions stated below.  Sublicensing is not allowed; section 10-makes it unnecessary.--  3. Protecting Users' Legal Rights From Anti-Circumvention Law.--  No covered work shall be deemed part of an effective technological-measure under any applicable law fulfilling obligations under article-11 of the WIPO copyright treaty adopted on 20 December 1996, or-similar laws prohibiting or restricting circumvention of such-measures.--  When you convey a covered work, you waive any legal power to forbid-circumvention of technological measures to the extent such circumvention-is effected by exercising rights under this License with respect to-the covered work, and you disclaim any intention to limit operation or-modification of the work as a means of enforcing, against the work's-users, your or third parties' legal rights to forbid circumvention of-technological measures.--  4. Conveying Verbatim Copies.--  You may convey verbatim copies of the Program's source code as you-receive it, in any medium, provided that you conspicuously and-appropriately publish on each copy an appropriate copyright notice;-keep intact all notices stating that this License and any-non-permissive terms added in accord with section 7 apply to the code;-keep intact all notices of the absence of any warranty; and give all-recipients a copy of this License along with the Program.--  You may charge any price or no price for each copy that you convey,-and you may offer support or warranty protection for a fee.--  5. Conveying Modified Source Versions.--  You may convey a work based on the Program, or the modifications to-produce it from the Program, in the form of source code under the-terms of section 4, provided that you also meet all of these conditions:--    a) The work must carry prominent notices stating that you modified-    it, and giving a relevant date.--    b) The work must carry prominent notices stating that it is-    released under this License and any conditions added under section-    7.  This requirement modifies the requirement in section 4 to-    "keep intact all notices".--    c) You must license the entire work, as a whole, under this-    License to anyone who comes into possession of a copy.  This-    License will therefore apply, along with any applicable section 7-    additional terms, to the whole of the work, and all its parts,-    regardless of how they are packaged.  This License gives no-    permission to license the work in any other way, but it does not-    invalidate such permission if you have separately received it.--    d) If the work has interactive user interfaces, each must display-    Appropriate Legal Notices; however, if the Program has interactive-    interfaces that do not display Appropriate Legal Notices, your-    work need not make them do so.--  A compilation of a covered work with other separate and independent-works, which are not by their nature extensions of the covered work,-and which are not combined with it such as to form a larger program,-in or on a volume of a storage or distribution medium, is called an-"aggregate" if the compilation and its resulting copyright are not-used to limit the access or legal rights of the compilation's users-beyond what the individual works permit.  Inclusion of a covered work-in an aggregate does not cause this License to apply to the other-parts of the aggregate.--  6. Conveying Non-Source Forms.--  You may convey a covered work in object code form under the terms-of sections 4 and 5, provided that you also convey the-machine-readable Corresponding Source under the terms of this License,-in one of these ways:--    a) Convey the object code in, or embodied in, a physical product-    (including a physical distribution medium), accompanied by the-    Corresponding Source fixed on a durable physical medium-    customarily used for software interchange.--    b) Convey the object code in, or embodied in, a physical product-    (including a physical distribution medium), accompanied by a-    written offer, valid for at least three years and valid for as-    long as you offer spare parts or customer support for that product-    model, to give anyone who possesses the object code either (1) a-    copy of the Corresponding Source for all the software in the-    product that is covered by this License, on a durable physical-    medium customarily used for software interchange, for a price no-    more than your reasonable cost of physically performing this-    conveying of source, or (2) access to copy the-    Corresponding Source from a network server at no charge.--    c) Convey individual copies of the object code with a copy of the-    written offer to provide the Corresponding Source.  This-    alternative is allowed only occasionally and noncommercially, and-    only if you received the object code with such an offer, in accord-    with subsection 6b.--    d) Convey the object code by offering access from a designated-    place (gratis or for a charge), and offer equivalent access to the-    Corresponding Source in the same way through the same place at no-    further charge.  You need not require recipients to copy the-    Corresponding Source along with the object code.  If the place to-    copy the object code is a network server, the Corresponding Source-    may be on a different server (operated by you or a third party)-    that supports equivalent copying facilities, provided you maintain-    clear directions next to the object code saying where to find the-    Corresponding Source.  Regardless of what server hosts the-    Corresponding Source, you remain obligated to ensure that it is-    available for as long as needed to satisfy these requirements.--    e) Convey the object code using peer-to-peer transmission, provided-    you inform other peers where the object code and Corresponding-    Source of the work are being offered to the general public at no-    charge under subsection 6d.--  A separable portion of the object code, whose source code is excluded-from the Corresponding Source as a System Library, need not be-included in conveying the object code work.--  A "User Product" is either (1) a "consumer product", which means any-tangible personal property which is normally used for personal, family,-or household purposes, or (2) anything designed or sold for incorporation-into a dwelling.  In determining whether a product is a consumer product,-doubtful cases shall be resolved in favor of coverage.  For a particular-product received by a particular user, "normally used" refers to a-typical or common use of that class of product, regardless of the status-of the particular user or of the way in which the particular user-actually uses, or expects or is expected to use, the product.  A product-is a consumer product regardless of whether the product has substantial-commercial, industrial or non-consumer uses, unless such uses represent-the only significant mode of use of the product.--  "Installation Information" for a User Product means any methods,-procedures, authorization keys, or other information required to install-and execute modified versions of a covered work in that User Product from-a modified version of its Corresponding Source.  The information must-suffice to ensure that the continued functioning of the modified object-code is in no case prevented or interfered with solely because-modification has been made.--  If you convey an object code work under this section in, or with, or-specifically for use in, a User Product, and the conveying occurs as-part of a transaction in which the right of possession and use of the-User Product is transferred to the recipient in perpetuity or for a-fixed term (regardless of how the transaction is characterized), the-Corresponding Source conveyed under this section must be accompanied-by the Installation Information.  But this requirement does not apply-if neither you nor any third party retains the ability to install-modified object code on the User Product (for example, the work has-been installed in ROM).--  The requirement to provide Installation Information does not include a-requirement to continue to provide support service, warranty, or updates-for a work that has been modified or installed by the recipient, or for-the User Product in which it has been modified or installed.  Access to a-network may be denied when the modification itself materially and-adversely affects the operation of the network or violates the rules and-protocols for communication across the network.--  Corresponding Source conveyed, and Installation Information provided,-in accord with this section must be in a format that is publicly-documented (and with an implementation available to the public in-source code form), and must require no special password or key for-unpacking, reading or copying.--  7. Additional Terms.--  "Additional permissions" are terms that supplement the terms of this-License by making exceptions from one or more of its conditions.-Additional permissions that are applicable to the entire Program shall-be treated as though they were included in this License, to the extent-that they are valid under applicable law.  If additional permissions-apply only to part of the Program, that part may be used separately-under those permissions, but the entire Program remains governed by-this License without regard to the additional permissions.--  When you convey a copy of a covered work, you may at your option-remove any additional permissions from that copy, or from any part of-it.  (Additional permissions may be written to require their own-removal in certain cases when you modify the work.)  You may place-additional permissions on material, added by you to a covered work,-for which you have or can give appropriate copyright permission.--  Notwithstanding any other provision of this License, for material you-add to a covered work, you may (if authorized by the copyright holders of-that material) supplement the terms of this License with terms:--    a) Disclaiming warranty or limiting liability differently from the-    terms of sections 15 and 16 of this License; or--    b) Requiring preservation of specified reasonable legal notices or-    author attributions in that material or in the Appropriate Legal-    Notices displayed by works containing it; or--    c) Prohibiting misrepresentation of the origin of that material, or-    requiring that modified versions of such material be marked in-    reasonable ways as different from the original version; or--    d) Limiting the use for publicity purposes of names of licensors or-    authors of the material; or--    e) Declining to grant rights under trademark law for use of some-    trade names, trademarks, or service marks; or--    f) Requiring indemnification of licensors and authors of that-    material by anyone who conveys the material (or modified versions of-    it) with contractual assumptions of liability to the recipient, for-    any liability that these contractual assumptions directly impose on-    those licensors and authors.--  All other non-permissive additional terms are considered "further-restrictions" within the meaning of section 10.  If the Program as you-received it, or any part of it, contains a notice stating that it is-governed by this License along with a term that is a further-restriction, you may remove that term.  If a license document contains-a further restriction but permits relicensing or conveying under this-License, you may add to a covered work material governed by the terms-of that license document, provided that the further restriction does-not survive such relicensing or conveying.--  If you add terms to a covered work in accord with this section, you-must place, in the relevant source files, a statement of the-additional terms that apply to those files, or a notice indicating-where to find the applicable terms.--  Additional terms, permissive or non-permissive, may be stated in the-form of a separately written license, or stated as exceptions;-the above requirements apply either way.--  8. Termination.--  You may not propagate or modify a covered work except as expressly-provided under this License.  Any attempt otherwise to propagate or-modify it is void, and will automatically terminate your rights under-this License (including any patent licenses granted under the third-paragraph of section 11).--  However, if you cease all violation of this License, then your-license from a particular copyright holder is reinstated (a)-provisionally, unless and until the copyright holder explicitly and-finally terminates your license, and (b) permanently, if the copyright-holder fails to notify you of the violation by some reasonable means-prior to 60 days after the cessation.--  Moreover, your license from a particular copyright holder is-reinstated permanently if the copyright holder notifies you of the-violation by some reasonable means, this is the first time you have-received notice of violation of this License (for any work) from that-copyright holder, and you cure the violation prior to 30 days after-your receipt of the notice.--  Termination of your rights under this section does not terminate the-licenses of parties who have received copies or rights from you under-this License.  If your rights have been terminated and not permanently-reinstated, you do not qualify to receive new licenses for the same-material under section 10.--  9. Acceptance Not Required for Having Copies.--  You are not required to accept this License in order to receive or-run a copy of the Program.  Ancillary propagation of a covered work-occurring solely as a consequence of using peer-to-peer transmission-to receive a copy likewise does not require acceptance.  However,-nothing other than this License grants you permission to propagate or-modify any covered work.  These actions infringe copyright if you do-not accept this License.  Therefore, by modifying or propagating a-covered work, you indicate your acceptance of this License to do so.--  10. Automatic Licensing of Downstream Recipients.--  Each time you convey a covered work, the recipient automatically-receives a license from the original licensors, to run, modify and-propagate that work, subject to this License.  You are not responsible-for enforcing compliance by third parties with this License.--  An "entity transaction" is a transaction transferring control of an-organization, or substantially all assets of one, or subdividing an-organization, or merging organizations.  If propagation of a covered-work results from an entity transaction, each party to that-transaction who receives a copy of the work also receives whatever-licenses to the work the party's predecessor in interest had or could-give under the previous paragraph, plus a right to possession of the-Corresponding Source of the work from the predecessor in interest, if-the predecessor has it or can get it with reasonable efforts.--  You may not impose any further restrictions on the exercise of the-rights granted or affirmed under this License.  For example, you may-not impose a license fee, royalty, or other charge for exercise of-rights granted under this License, and you may not initiate litigation-(including a cross-claim or counterclaim in a lawsuit) alleging that-any patent claim is infringed by making, using, selling, offering for-sale, or importing the Program or any portion of it.--  11. Patents.--  A "contributor" is a copyright holder who authorizes use under this-License of the Program or a work on which the Program is based.  The-work thus licensed is called the contributor's "contributor version".--  A contributor's "essential patent claims" are all patent claims-owned or controlled by the contributor, whether already acquired or-hereafter acquired, that would be infringed by some manner, permitted-by this License, of making, using, or selling its contributor version,-but do not include claims that would be infringed only as a-consequence of further modification of the contributor version.  For-purposes of this definition, "control" includes the right to grant-patent sublicenses in a manner consistent with the requirements of-this License.--  Each contributor grants you a non-exclusive, worldwide, royalty-free-patent license under the contributor's essential patent claims, to-make, use, sell, offer for sale, import and otherwise run, modify and-propagate the contents of its contributor version.--  In the following three paragraphs, a "patent license" is any express-agreement or commitment, however denominated, not to enforce a patent-(such as an express permission to practice a patent or covenant not to-sue for patent infringement).  To "grant" such a patent license to a-party means to make such an agreement or commitment not to enforce a-patent against the party.--  If you convey a covered work, knowingly relying on a patent license,-and the Corresponding Source of the work is not available for anyone-to copy, free of charge and under the terms of this License, through a-publicly available network server or other readily accessible means,-then you must either (1) cause the Corresponding Source to be so-available, or (2) arrange to deprive yourself of the benefit of the-patent license for this particular work, or (3) arrange, in a manner-consistent with the requirements of this License, to extend the patent-license to downstream recipients.  "Knowingly relying" means you have-actual knowledge that, but for the patent license, your conveying the-covered work in a country, or your recipient's use of the covered work-in a country, would infringe one or more identifiable patents in that-country that you have reason to believe are valid.--  If, pursuant to or in connection with a single transaction or-arrangement, you convey, or propagate by procuring conveyance of, a-covered work, and grant a patent license to some of the parties-receiving the covered work authorizing them to use, propagate, modify-or convey a specific copy of the covered work, then the patent license-you grant is automatically extended to all recipients of the covered-work and works based on it.--  A patent license is "discriminatory" if it does not include within-the scope of its coverage, prohibits the exercise of, or is-conditioned on the non-exercise of one or more of the rights that are-specifically granted under this License.  You may not convey a covered-work if you are a party to an arrangement with a third party that is-in the business of distributing software, under which you make payment-to the third party based on the extent of your activity of conveying-the work, and under which the third party grants, to any of the-parties who would receive the covered work from you, a discriminatory-patent license (a) in connection with copies of the covered work-conveyed by you (or copies made from those copies), or (b) primarily-for and in connection with specific products or compilations that-contain the covered work, unless you entered into that arrangement,-or that patent license was granted, prior to 28 March 2007.--  Nothing in this License shall be construed as excluding or limiting-any implied license or other defenses to infringement that may-otherwise be available to you under applicable patent law.--  12. No Surrender of Others' Freedom.--  If conditions are imposed on you (whether by court order, agreement or-otherwise) that contradict the conditions of this License, they do not-excuse you from the conditions of this License.  If you cannot convey a-covered work so as to satisfy simultaneously your obligations under this-License and any other pertinent obligations, then as a consequence you may-not convey it at all.  For example, if you agree to terms that obligate you-to collect a royalty for further conveying from those to whom you convey-the Program, the only way you could satisfy both those terms and this-License would be to refrain entirely from conveying the Program.--  13. Use with the GNU Affero General Public License.--  Notwithstanding any other provision of this License, you have-permission to link or combine any covered work with a work licensed-under version 3 of the GNU Affero General Public License into a single-combined work, and to convey the resulting work.  The terms of this-License will continue to apply to the part which is the covered work,-but the special requirements of the GNU Affero General Public License,-section 13, concerning interaction through a network will apply to the-combination as such.--  14. Revised Versions of this License.--  The Free Software Foundation may publish revised and/or new versions of-the GNU General Public License from time to time.  Such new versions will-be similar in spirit to the present version, but may differ in detail to-address new problems or concerns.--  Each version is given a distinguishing version number.  If the-Program specifies that a certain numbered version of the GNU General-Public License "or any later version" applies to it, you have the-option of following the terms and conditions either of that numbered-version or of any later version published by the Free Software-Foundation.  If the Program does not specify a version number of the-GNU General Public License, you may choose any version ever published-by the Free Software Foundation.--  If the Program specifies that a proxy can decide which future-versions of the GNU General Public License can be used, that proxy's-public statement of acceptance of a version permanently authorizes you-to choose that version for the Program.--  Later license versions may give you additional or different-permissions.  However, no additional obligations are imposed on any-author or copyright holder as a result of your choosing to follow a-later version.--  15. Disclaimer of Warranty.--  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.--  16. Limitation of Liability.--  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF-SUCH DAMAGES.--  17. Interpretation of Sections 15 and 16.--  If the disclaimer of warranty and limitation of liability provided-above cannot be given local legal effect according to their terms,-reviewing courts shall apply local law that most closely approximates-an absolute waiver of all civil liability in connection with the-Program, unless a warranty or assumption of liability accompanies a-copy of the Program in return for a fee.--                     END OF TERMS AND CONDITIONS--            How to Apply These Terms to Your New Programs--  If you develop a new program, and you want it to be of the greatest-possible use to the public, the best way to achieve this is to make it-free software which everyone can redistribute and change under these terms.--  To do so, attach the following notices to the program.  It is safest-to attach them to the start of each source file to most effectively-state the exclusion of warranty; and each file should have at least-the "copyright" line and a pointer to where the full notice is found.--    <one line to give the program's name and a brief idea of what it does.>-    Copyright (C) <year>  <name of author>--    This program is free software: you can redistribute it and/or modify-    it under the terms of the GNU General Public License as published by-    the Free Software Foundation, either version 3 of the License, or-    (at your option) any later version.--    This program is distributed in the hope that it will be useful,-    but WITHOUT ANY WARRANTY; without even the implied warranty of-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the-    GNU General Public License for more details.--    You should have received a copy of the GNU General Public License-    along with this program.  If not, see <http://www.gnu.org/licenses/>.--Also add information on how to contact you by electronic and paper mail.--  If the program does terminal interaction, make it output a short-notice like this when it starts in an interactive mode:--    <program>  Copyright (C) <year>  <name of author>-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.-    This is free software, and you are welcome to redistribute it-    under certain conditions; type `show c' for details.--The hypothetical commands `show w' and `show c' should show the appropriate-parts of the General Public License.  Of course, your program's commands-might be different; for a GUI interface, you would use an "about box".--  You should also get your employer (if you work as a programmer) or school,-if any, to sign a "copyright disclaimer" for the program, if necessary.-For more information on this, and how to apply and follow the GNU GPL, see-<http://www.gnu.org/licenses/>.--  The GNU General Public License does not permit incorporating your program-into proprietary programs.  If your program is a subroutine library, you-may consider it more useful to permit linking proprietary applications with-the library.  If this is what you want to do, use the GNU Lesser General-Public License instead of this License.  But first, please read-<http://www.gnu.org/philosophy/why-not-lgpl.html>.

@@ -1,971 +0,0 @@--- Copyright (C) 2010 John Millikin <jmillikin@gmail.com>--- --- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- any later version.--- --- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.--- --- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.--{-# LANGUAGE ForeignFunctionInterface #-}-{-# LANGUAGE OverloadedStrings #-}-{-# LANGUAGE DeriveDataTypeable #-}-module Network.Protocol.SASL.GNU-	(-	-- * Library Information-	  headerVersion-	, libraryVersion-	, checkVersion-	-	-- * SASL Contexts-	, SASL-	, runSASL-	, setCallback-	, runCallback-	-	-- * Mechanisms-	, Mechanism (..)-	, clientMechanisms-	, clientSupports-	, clientSuggestMechanism-	, serverMechanisms-	, serverSupports-	-	-- * SASL Sessions-	, Session-	, runClient-	, runServer-	, mechanismName-	-	-- ** Session Properties-	, Property (..)-	, setProperty-	, getProperty-	, getPropertyFast-	-	-- ** Session IO-	, Progress (..)-	, step-	, step64-	, encode-	, decode-	-	-- ** Error handling-	, Error (..)-	, catch-	, handle-	, try-	, throw-	-	-- * Bundled codecs-	, toBase64-	, fromBase64-	, md5-	, sha1-	, hmacMD5-	, hmacSHA1-	, nonce-	, random-	) where---- Imports {{{--import Prelude hiding (catch)-import qualified Control.Exception as E-import qualified Data.ByteString as B-import qualified Data.ByteString.Unsafe as B-import Data.ByteString.Char8 ()-import Data.Char (isDigit)-import Data.Typeable (Typeable)-import Data.String (IsString, fromString)-import qualified Foreign as F-import qualified Foreign.C as F-import System.IO.Unsafe (unsafePerformIO)-import Control.Monad (when, unless)-import Control.Monad.IO.Class (MonadIO, liftIO)-import qualified Control.Monad.Trans.Reader as R-import qualified Text.ParserCombinators.ReadP as P---- }}}---- Library Information {{{---- | Which version of @gsasl.h@ this module was compiled against-headerVersion :: (Integer, Integer, Integer)-headerVersion = (major, minor, patch) where-	major = toInteger hsgsasl_VERSION_MAJOR-	minor = toInteger hsgsasl_VERSION_MINOR-	patch = toInteger hsgsasl_VERSION_PATCH---- | Which version of @libgsasl.so@ is loaded-libraryVersion :: IO (Integer, Integer, Integer)-libraryVersion = io where-	parseVersion str = case P.readP_to_S parser str of-		[] -> Nothing-		((parsed, _):_) -> Just parsed-	parser = do-		majorS <- P.munch1 isDigit-		P.char '.'-		minorS <- P.munch1 isDigit-		P.char '.'-		patchS <- P.munch1 isDigit-		P.eof-		return (read majorS, read minorS, read patchS)-	io = do-		cstr <- gsasl_check_version F.nullPtr-		maybeStr <- F.maybePeek F.peekCString cstr-		return $ case maybeStr >>= parseVersion of-			Just version -> version-			Nothing -> error $ "Invalid version string: " ++ show maybeStr---- | Whether the header and library versions are compatible-checkVersion :: IO Bool-checkVersion = fmap (== 1) hsgsasl_check_version---- }}}---- SASL Contexts {{{--newtype Context = Context (F.Ptr Context)-newtype SASL a = SASL { unSASL :: R.ReaderT Context IO a }--instance Functor SASL where-	fmap f = SASL . fmap f . unSASL--instance Monad SASL where-	return = SASL . return-	(>>=) sasl f = SASL $ unSASL sasl >>= unSASL . f--instance MonadIO SASL where-	liftIO = SASL . liftIO---- TODO: more instances--runSASL :: SASL a -> IO a-runSASL = withContext . R.runReaderT . unSASL--withContext :: (Context -> IO a) -> IO a-withContext = E.bracket newContext freeContext where-	newContext = F.alloca $ \pCtxt -> do-		gsasl_init pCtxt >>= checkRC-		Context `fmap` F.peek pCtxt-	freeContext (Context ctx) = do-		hook <- gsasl_callback_hook_get ctx-		gsasl_done ctx-		freeCallbackHook hook--getContext :: SASL (F.Ptr Context)-getContext = SASL $ do-	Context ptr <- R.ask-	return ptr--bracketSASL :: (F.Ptr Context -> IO a) -> (a -> IO b) -> (a -> IO c) -> SASL c-bracketSASL before after thing = do-	ctx <- getContext-	liftIO $ E.bracket (before ctx) after thing---- }}}---- Mechanisms {{{--newtype Mechanism = Mechanism B.ByteString-	deriving (Show, Eq)--instance IsString Mechanism where-	fromString = Mechanism . fromString---- | A list of 'Mechanism's supported by the @libgsasl@ client.-clientMechanisms :: SASL [Mechanism]-clientMechanisms = bracketSASL io gsasl_free splitMechListPtr where-	io ctx = F.alloca $ \pStr -> do-		gsasl_client_mechlist ctx pStr >>= checkRC-		F.peek pStr---- | Whether there is client-side support for a specified 'Mechanism'.-clientSupports :: Mechanism -> SASL Bool-clientSupports (Mechanism name) = do-	ctx <- getContext-	liftIO $ B.useAsCString name $ \pName -> do-		cres <- gsasl_client_support_p ctx pName-		return $ cres == 1---- | Given a list of 'Mechanism's, suggest which to use (or 'Nothing' if--- no supported 'Mechanism' is found).-clientSuggestMechanism :: [Mechanism] -> SASL (Maybe Mechanism)-clientSuggestMechanism mechs = do-	let bytes = B.intercalate " " [x | Mechanism x <- mechs]-	ctx <- getContext-	liftIO $ B.useAsCString bytes $ \pMechlist ->-		gsasl_client_suggest_mechanism ctx pMechlist >>=-		F.maybePeek (fmap Mechanism . B.packCString)---- | A list of 'Mechanism's supported by the @libgsasl@ server.-serverMechanisms :: SASL [Mechanism]-serverMechanisms = bracketSASL io gsasl_free splitMechListPtr where-	io ctx = F.alloca $ \pStr -> do-		gsasl_server_mechlist ctx pStr >>= checkRC-		F.peek pStr---- | Whether there is server-side support for a specified 'Mechanism'.-serverSupports :: Mechanism -> SASL Bool-serverSupports (Mechanism name) = do-	ctx <- getContext-	liftIO $ B.useAsCString name $ \pName -> do-		cres <- gsasl_server_support_p ctx pName-		return $ cres == 1--splitMechListPtr :: F.CString -> IO [Mechanism]-splitMechListPtr ptr = unfoldrM step' (ptr, ptr, 0, True) where-	step' (_, _, _, False) = return Nothing-	step' (p_0, p_i, i, _) = F.peek p_i >>= \chr -> let-		p_i' = F.plusPtr p_i 1-		peek continue = if i == 0-			then step' (p_i', p_i', 0, continue)-			else do-				bytes <- B.packCStringLen (p_0, i)-				return $ Just (Mechanism bytes, (p_i', p_i', 0, continue))-		in case chr of-			0x00 -> peek False-			0x20 -> peek True-			_    -> step' (p_0, p_i', i + 1, True)---- }}}---- SASL Sessions {{{--newtype SessionCtx = SessionCtx (F.Ptr SessionCtx)-newtype Session a = Session { unSession :: R.ReaderT SessionCtx IO a }--instance Functor Session where-	fmap f = Session . fmap f . unSession--instance Monad Session where-	return = Session . return-	(>>=) m f = Session $ unSession m >>= unSession . f--instance MonadIO Session where-	liftIO = Session . liftIO--type SessionProc = F.Ptr Context -> F.CString -> F.Ptr (F.Ptr SessionCtx) -> IO F.CInt--runSession :: SessionProc -> Mechanism -> Session a -> SASL (Either Error a)-runSession start (Mechanism mech) session = bracketSASL newSession freeSession io where-	newSession ctx =-		B.useAsCString mech $ \pMech ->-		F.alloca $ \pSessionCtx -> E.handle noSession $ do-		start ctx pMech pSessionCtx >>= checkRC-		fmap (Right . SessionCtx) $ F.peek pSessionCtx-	noSession (SASLException err) = return $ Left err-	-	freeSession (Left _) = return ()-	freeSession (Right (SessionCtx ptr)) = gsasl_finish ptr-	-	io (Left err) = return $ Left err-	io (Right sctx) = E.catch-		(fmap Right $ R.runReaderT (unSession session) sctx)-		(\(SASLException err) -> return $ Left err)---- | Run a session using the @libgsasl@ client.-runClient :: Mechanism -> Session a -> SASL (Either Error a)-runClient = runSession gsasl_client_start---- | Run a session using the @libgsasl@ server.-runServer :: Mechanism -> Session a -> SASL (Either Error a)-runServer = runSession gsasl_server_start--getSessionContext :: Session (F.Ptr SessionCtx)-getSessionContext = Session $ do-	SessionCtx sctx <- R.ask-	return sctx---- | The name of the session's SASL mechanism.-mechanismName :: Session Mechanism-mechanismName = do-	sctx <- getSessionContext-	liftIO $ do-		cstr <- gsasl_mechanism_name sctx-		Mechanism `fmap` B.packCString cstr--bracketSession :: (F.Ptr SessionCtx -> IO a) -> (a -> IO b) -> (a -> IO c) -> Session c-bracketSession before after thing = do-	sctx <- getSessionContext-	liftIO $ E.bracket (before sctx) after thing---- }}}---- Error handling {{{--data Error-	= UnknownMechanism-	| MechanismCalledTooManyTimes-	| MallocError-	| Base64Error-	| CryptoError-	| SASLPrepError-	| MechanismParseError-	| AuthenticationError-	| IntegrityError-	| NoClientCode-	| NoServerCode-	| NoCallback-	| NoAnonymousToken-	| NoAuthID-	| NoAuthzID-	| NoPassword-	| NoPasscode-	| NoPIN-	| NoService-	| NoHostname-	-	| GSSAPI_ReleaseBufferError-	| GSSAPI_ImportNameError-	| GSSAPI_InitSecContextError-	| GSSAPI_AcceptSecContextError-	| GSSAPI_UnwrapError-	| GSSAPI_WrapError-	| GSSAPI_AquireCredError-	| GSSAPI_DisplayNameError-	| GSSAPI_UnsupportedProtectionError-	| GSSAPI_EncapsulateTokenError-	| GSSAPI_DecapsulateTokenError-	| GSSAPI_InquireMechForSASLNameError-	| GSSAPI_TestOIDSetMemberError-	| GSSAPI_ReleaseOIDSetError-	-	| KerberosV5_InitError-	| KerberosV5_InternalError-	-	| SecurID_ServerNeedAdditionalPasscode-	| SecurID_ServerNeedNewPIN--instance Show Error where-	show = strError---- | Convert an error code to a human-readable string explanation for the--- particular error code.------ This string can be used to output a diagnostic message to the user.-strError :: Error -> String-strError err = unsafePerformIO $ gsasl_strerror (cFromError err) >>= F.peekCString--data SASLException = SASLException Error-	deriving (Show, Typeable)--instance E.Exception SASLException--cFromError :: Error -> F.CInt-cFromError e = case e of-	UnknownMechanism -> 2-	MechanismCalledTooManyTimes -> 3-	MallocError -> 7-	Base64Error -> 8-	CryptoError -> 9-	SASLPrepError -> 29-	MechanismParseError -> 30-	AuthenticationError -> 31-	IntegrityError -> 33-	NoClientCode -> 35-	NoServerCode -> 36-	NoCallback -> 51-	NoAnonymousToken -> 52-	NoAuthID -> 53-	NoAuthzID -> 54-	NoPassword -> 55-	NoPasscode -> 56-	NoPIN -> 57-	NoService -> 58-	NoHostname -> 59-	GSSAPI_ReleaseBufferError -> 37-	GSSAPI_ImportNameError -> 38-	GSSAPI_InitSecContextError -> 39-	GSSAPI_AcceptSecContextError -> 40-	GSSAPI_UnwrapError -> 41-	GSSAPI_WrapError -> 42-	GSSAPI_AquireCredError -> 43-	GSSAPI_DisplayNameError -> 44-	GSSAPI_UnsupportedProtectionError -> 45-	GSSAPI_EncapsulateTokenError -> 60-	GSSAPI_DecapsulateTokenError -> 61-	GSSAPI_InquireMechForSASLNameError -> 62-	GSSAPI_TestOIDSetMemberError -> 63-	GSSAPI_ReleaseOIDSetError -> 64-	KerberosV5_InitError -> 46-	KerberosV5_InternalError -> 47-	SecurID_ServerNeedAdditionalPasscode -> 48-	SecurID_ServerNeedNewPIN -> 49--cToError :: F.CInt -> Error-cToError x = case x of-	2 -> UnknownMechanism-	3 -> MechanismCalledTooManyTimes-	7 -> MallocError-	8 -> Base64Error-	9 -> CryptoError-	29 -> SASLPrepError-	30 -> MechanismParseError-	31 -> AuthenticationError-	33 -> IntegrityError-	35 -> NoClientCode-	36 -> NoServerCode-	51 -> NoCallback-	52 -> NoAnonymousToken -	53 -> NoAuthID-	54 -> NoAuthzID-	55 -> NoPassword-	56 -> NoPasscode-	57 -> NoPIN-	58 -> NoService-	59 -> NoHostname-	37 -> GSSAPI_ReleaseBufferError-	38 -> GSSAPI_ImportNameError-	39 -> GSSAPI_InitSecContextError-	40 -> GSSAPI_AcceptSecContextError-	41 -> GSSAPI_UnwrapError-	42 -> GSSAPI_WrapError-	43 -> GSSAPI_AquireCredError-	44 -> GSSAPI_DisplayNameError-	45 -> GSSAPI_UnsupportedProtectionError-	60 -> GSSAPI_EncapsulateTokenError-	61 -> GSSAPI_DecapsulateTokenError-	62 -> GSSAPI_InquireMechForSASLNameError-	63 -> GSSAPI_TestOIDSetMemberError-	64 -> GSSAPI_ReleaseOIDSetError-	46 -> KerberosV5_InitError-	47 -> KerberosV5_InternalError-	48 -> SecurID_ServerNeedAdditionalPasscode-	49 -> SecurID_ServerNeedNewPIN-	_ -> error $ "Unknown GNU SASL return code: " ++ show x--throw :: Error -> Session a-throw = liftIO . E.throwIO . SASLException--catch :: Session a -> (Error -> Session a) -> Session a-catch m f = do-	sctx <- SessionCtx `fmap` getSessionContext-	Session . liftIO $ E.catch-		(R.runReaderT (unSession m) sctx)-		(\(SASLException err) -> R.runReaderT (unSession (f err)) sctx)--handle :: (Error -> Session a) -> Session a -> Session a-handle = flip catch--try :: Session a -> Session (Either Error a)-try m = catch (fmap Right m) (return . Left)---- }}}---- Session Properties {{{--data Property-	= PropertyAuthID-	| PropertyAuthzID-	| PropertyPassword-	| PropertyAnonymousToken-	| PropertyService-	| PropertyHostname-	| PropertyGSSAPIDisplayName-	| PropertyPasscode-	| PropertySuggestedPIN-	| PropertyPIN-	| PropertyRealm-	| PropertyDigestMD5HashedPassword-	| PropertyQOPS-	| PropertyQOP-	| PropertyScramIter-	| PropertyScramSalt-	| PropertyScramSaltedPassword-	-	| ValidateSimple-	| ValidateExternal-	| ValidateAnonymous-	| ValidateGSSAPI-	| ValidateSecurID-	deriving (Show, Eq)--cFromProperty :: Property -> F.CInt-cFromProperty x = case x of-	PropertyAuthID -> 1-	PropertyAuthzID -> 2-	PropertyPassword -> 3-	PropertyAnonymousToken -> 4-	PropertyService -> 5-	PropertyHostname -> 6-	PropertyGSSAPIDisplayName -> 7-	PropertyPasscode -> 8-	PropertySuggestedPIN -> 9-	PropertyPIN -> 10-	PropertyRealm -> 11-	PropertyDigestMD5HashedPassword -> 12-	PropertyQOPS -> 13-	PropertyQOP -> 14-	PropertyScramIter -> 15-	PropertyScramSalt -> 16-	PropertyScramSaltedPassword -> 17-	ValidateSimple -> 500-	ValidateExternal -> 501-	ValidateAnonymous -> 502-	ValidateGSSAPI -> 503-	ValidateSecurID -> 504--cToProperty :: F.CInt -> Property-cToProperty x = case x of-	1 -> PropertyAuthID-	2 -> PropertyAuthzID-	3 -> PropertyPassword-	4 -> PropertyAnonymousToken-	5 -> PropertyService-	6 -> PropertyHostname-	7 -> PropertyGSSAPIDisplayName-	8 -> PropertyPasscode-	9 -> PropertySuggestedPIN-	10 -> PropertyPIN-	11 -> PropertyRealm-	12 -> PropertyDigestMD5HashedPassword-	13 -> PropertyQOPS-	14 -> PropertyQOP-	15 -> PropertyScramIter-	16 -> PropertyScramSalt-	17 -> PropertyScramSaltedPassword-	500 -> ValidateSimple-	501 -> ValidateExternal-	502 -> ValidateAnonymous-	503 -> ValidateGSSAPI-	504 -> ValidateSecurID-	_   -> error $ "Unknown GNU SASL property code: " ++ show x---- | Store some data in the session for the given property. The data must--- be @NULL@-terminated.-setProperty :: Property -> B.ByteString -> Session ()-setProperty prop bytes = do-	sctx <- getSessionContext-	liftIO $-		B.useAsCString bytes $-		gsasl_property_set sctx (cFromProperty prop)---- | Retrieve the data stored in the session for the given property,--- possibly invoking the current callback to get the value.-getProperty :: Property -> Session (Maybe B.ByteString)-getProperty prop = do-	sctx <- getSessionContext-	liftIO $ do-		cstr <- gsasl_property_get sctx (cFromProperty prop)-		if cstr /= F.nullPtr-			then fmap Just $ B.packCString cstr-			else do-				liftIO $ checkCallbackException sctx-				return Nothing---- | Retrieve the data stored in the session for the given property,--- without invoking the current callback.-getPropertyFast :: Property -> Session (Maybe B.ByteString)-getPropertyFast prop = do-	sctx <- getSessionContext-	liftIO $-		gsasl_property_fast sctx (cFromProperty prop) >>=-		F.maybePeek B.packCString---- }}}---- Callbacks {{{--type CallbackFn = F.Ptr Context -> F.Ptr SessionCtx -> F.CInt -> IO F.CInt-data CallbackHook = CallbackHook (F.FunPtr CallbackFn) (Property -> Session Progress)--newCallbackHook :: (Property -> Session Progress) -> IO (F.Ptr CallbackHook, F.FunPtr CallbackFn)-newCallbackHook cb = E.bracketOnError-	(wrapCallbackImpl (callbackImpl cb))-	F.freeHaskellFunPtr-	(\funPtr -> let hook = CallbackHook funPtr cb in E.bracketOnError-		(F.newStablePtr hook)-		F.freeStablePtr-		(\stablePtr -> let-			hookPtr = F.castPtr (F.castStablePtrToPtr stablePtr)-			in return (hookPtr, funPtr)))--freeCallbackHook :: F.Ptr CallbackHook -> IO ()-freeCallbackHook ptr = unless (ptr == F.nullPtr) $ do-	let stablePtr = F.castPtrToStablePtr $ F.castPtr ptr-	hook <- F.deRefStablePtr stablePtr-	F.freeStablePtr stablePtr-	let (CallbackHook funPtr _) = hook-	F.freeHaskellFunPtr funPtr--callbackImpl :: (Property -> Session Progress) -> CallbackFn-callbackImpl cb _ sctx cProp = let-	globalIO = error "globalIO is not implemented"-	-	sessionIO = do-		let session = cb $ cToProperty cProp-		fmap cFromProgress $ R.runReaderT (unSession session) (SessionCtx sctx)-	-	onError :: SASLException -> IO F.CInt-	onError (SASLException err) = return $ cFromError err-	-	onException :: E.SomeException -> IO F.CInt-	onException exc = do-		-- A bit ugly; session hooks aren't used anywhere else in-		-- the binding, so the exception is stashed here.-		stablePtr <- F.newStablePtr exc-		gsasl_session_hook_set sctx $ F.castStablePtrToPtr stablePtr-		-		-- standard libgsasl return codes are all >= 0, so using -1-		-- provides an easy way to determine later whether the-		-- exception came from Haskell code.-		return (-1)-	-	catchErrors io = E.catches io [E.Handler onError, E.Handler onException]-	-	in catchErrors $ if sctx == F.nullPtr then globalIO else sessionIO--foreign import ccall "wrapper"-	wrapCallbackImpl :: CallbackFn -> IO (F.FunPtr CallbackFn)---- Used to check whether a callback threw an exception-checkCallbackException :: F.Ptr SessionCtx -> IO ()-checkCallbackException sctx = do-	hook <- gsasl_session_hook_get sctx-	when (hook /= F.nullPtr) $ do-		let stable = F.castPtrToStablePtr hook-		exc <- F.deRefStablePtr stable-		F.freeStablePtr stable-		E.throwIO (exc :: E.SomeException)---- | Set the current SASL callback. The callback will be used by mechanisms--- to discover various parameters, such as usernames and passwords.-setCallback :: (Property -> Session Progress) -> SASL ()-setCallback cb = do-	ctx <- getContext-	liftIO $ do-		freeCallbackHook =<< gsasl_callback_hook_get ctx-		(hook, cbPtr) <- newCallbackHook cb-		gsasl_callback_hook_set ctx hook-		gsasl_callback_set ctx cbPtr---- | Run the current callback; the property indicates what action the--- callback is expected to perform.-runCallback :: Property -> Session Progress-runCallback prop = do-	-- This is a bit evil; the first field in Gsasl_session is a Gsasl context,-	-- so it's safe to cast here (assuming they never change the layout).-	ctx <- fmap F.castPtr getSessionContext-	hookPtr <- liftIO $ gsasl_callback_hook_get ctx-	when (hookPtr == F.nullPtr) $ throw NoCallback-	hook <- liftIO $ F.deRefStablePtr $ F.castPtrToStablePtr hookPtr-	let (CallbackHook _ cb) = hook-	cb prop---- }}}---- Session IO {{{--data Progress = Complete | NeedsMore-	deriving (Show, Eq)--cFromProgress :: Progress -> F.CInt-cFromProgress x = case x of-	Complete -> 0-	NeedsMore -> 1---- | Perform one step of SASL authentication. This reads data from the other--- end, processes it (potentially running the callback), and returns data--- to be sent back.------ Also returns 'NeedsMore' if authentication is not yet complete.-step :: B.ByteString -> Session (B.ByteString, Progress)-step input = bracketSession get free peek where-	get sctx =-		B.unsafeUseAsCStringLen input $ \(pInput, inputLen) ->-		F.alloca $ \pOutput ->-		F.alloca $ \pOutputLen -> do-		rc <- gsasl_step sctx pInput (fromIntegral inputLen) pOutput pOutputLen-		when (rc /= 0) $ checkCallbackException sctx-		progress <- checkStepRC rc-		cstr <- F.peek pOutput-		cstrLen <- F.peek pOutputLen-		return (cstr, cstrLen, progress)-	-	free (cstr, _, _) = gsasl_free cstr-	peek (cstr, cstrLen, progress) = do-		output <- B.packCStringLen (cstr, fromIntegral cstrLen)-		return (output, progress)---- | A simple wrapper around 'step' which uses base64 to decode the input--- and encode the output.-step64 :: B.ByteString -> Session (B.ByteString, Progress)-step64 input = bracketSession get free peek where-	get sctx =-		B.useAsCString input $ \pInput ->-		F.alloca $ \pOutput -> do-		rc <- gsasl_step64 sctx pInput pOutput-		when (rc /= 0) $ checkCallbackException sctx-		progress <- checkStepRC rc-		cstr <- F.peek pOutput-		return (cstr, progress)-	-	free (cstr, _) = gsasl_free cstr-	peek (cstr, progress) = do-		output <- B.packCString cstr-		return (output, progress)--checkStepRC :: F.CInt -> IO Progress-checkStepRC x = case x of-	0 -> return Complete-	1 -> return NeedsMore-	_ -> E.throwIO (SASLException (cToError x))---- | Encode data according to the negotiated SASL mechanism. This might mean--- the data is integrity or privacy protected.-encode :: B.ByteString -> Session B.ByteString-encode input = do-	sctx <- getSessionContext-	liftIO $-		B.unsafeUseAsCStringLen input $ \(cstr, cstrLen) ->-		F.alloca $ \pOutput ->-		F.alloca $ \pOutputLen -> do-			rc <- gsasl_encode sctx cstr (fromIntegral cstrLen) pOutput pOutputLen-			when (rc /= 0) $ checkCallbackException sctx-			checkRC rc-			output <- F.peek pOutput-			outputLen <- fromIntegral `fmap` F.peek pOutputLen-			outBytes <- B.packCStringLen (output, outputLen)-			gsasl_free output-			return outBytes---- | Decode data according to the negotiated SASL mechanism. This might mean--- the data is integrity or privacy protected.-decode :: B.ByteString -> Session B.ByteString-decode input = do-	sctx <- getSessionContext-	liftIO $-		B.unsafeUseAsCStringLen input $ \(cstr, cstrLen) ->-		F.alloca $ \pOutput ->-		F.alloca $ \pOutputLen -> do-			rc <- gsasl_decode sctx cstr (fromIntegral cstrLen) pOutput pOutputLen-			when (rc /= 0) $ checkCallbackException sctx-			checkRC rc-			output <- F.peek pOutput-			outputLen <- fromIntegral `fmap` F.peek pOutputLen-			outputBytes <- B.packCStringLen (output, outputLen)-			gsasl_free output-			return outputBytes---- }}}---- Bundled codecs {{{--toBase64 :: B.ByteString -> B.ByteString-toBase64 input = unsafePerformIO $-	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->-	F.alloca $ \pOut ->-	F.alloca $ \pOutLen -> do-	gsasl_base64_to pIn (fromIntegral inLen) pOut pOutLen >>= checkRC-	outLen <- F.peek pOutLen-	outPtr <- F.peek pOut-	B.packCStringLen (outPtr, fromIntegral outLen)--fromBase64 :: B.ByteString -> B.ByteString-fromBase64 input = unsafePerformIO $-	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->-	F.alloca $ \pOut ->-	F.alloca $ \pOutLen -> do-	gsasl_base64_from pIn (fromIntegral inLen) pOut pOutLen >>= checkRC-	outLen <- F.peek pOutLen-	outPtr <- F.peek pOut-	B.packCStringLen (outPtr, fromIntegral outLen)--md5 :: B.ByteString -> B.ByteString-md5 input = unsafePerformIO $-	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->-	F.alloca $ \pOut ->-	F.allocaBytes 16 $ \outBuf -> do-	F.poke pOut outBuf-	gsasl_md5 pIn (fromIntegral inLen) pOut >>= checkRC-	B.packCStringLen (outBuf, 16)--sha1 :: B.ByteString -> B.ByteString-sha1 input = unsafePerformIO $-	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->-	F.alloca $ \pOut ->-	F.allocaBytes 20 $ \outBuf -> do-	F.poke pOut outBuf-	gsasl_sha1 pIn (fromIntegral inLen) pOut >>= checkRC-	B.packCStringLen (outBuf, 20)--hmacMD5 :: B.ByteString -- ^ Key-        -> B.ByteString -- ^ Input data-        -> B.ByteString-hmacMD5 key input = unsafePerformIO $-	B.unsafeUseAsCStringLen key $ \(pKey, keyLen) ->-	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->-	F.alloca $ \pOut ->-	F.allocaBytes 16 $ \outBuf -> do-	F.poke pOut outBuf-	gsasl_hmac_md5 pKey (fromIntegral keyLen) pIn (fromIntegral inLen) pOut >>= checkRC-	B.packCStringLen (outBuf, 16)--hmacSHA1 :: B.ByteString -- ^ Key-         -> B.ByteString -- ^ Input data-         -> B.ByteString-hmacSHA1 key input = unsafePerformIO $-	B.unsafeUseAsCStringLen key $ \(pKey, keyLen) ->-	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->-	F.alloca $ \pOut ->-	F.allocaBytes 20 $ \outBuf -> do-	F.poke pOut outBuf-	gsasl_hmac_sha1 pKey (fromIntegral keyLen) pIn (fromIntegral inLen) pOut >>= checkRC-	B.packCStringLen (outBuf, 20)---- | Returns unpredictable data of a given size-nonce :: Integer -> IO B.ByteString-nonce size = F.allocaBytes (fromInteger size) $ \buf -> do-	gsasl_nonce buf (fromIntegral size) >>= checkRC-	B.packCStringLen (buf, fromIntegral size)---- | Returns cryptographically strong random data of a given size-random :: Integer -> IO B.ByteString-random size = F.allocaBytes (fromInteger size) $ \buf -> do-	gsasl_random buf (fromIntegral size) >>= checkRC-	B.packCStringLen (buf, fromIntegral size)----- }}}---- Miscellaneous {{{--checkRC :: F.CInt -> IO ()-checkRC x = case x of-	0 -> return ()-	_ -> E.throwIO (SASLException (cToError x))--unfoldrM :: Monad m => (b -> m (Maybe (a, b))) -> b -> m [a]-unfoldrM m b = m b >>= \x -> case x of-	Just (a, new_b) -> do-		as <- unfoldrM m new_b-		return $ a : as-	Nothing -> return []---- }}}---- FFI imports {{{--foreign import ccall "hsgsasl_VERSION_MAJOR"-	hsgsasl_VERSION_MAJOR :: F.CInt--foreign import ccall "hsgsasl_VERSION_MINOR"-	hsgsasl_VERSION_MINOR :: F.CInt--foreign import ccall "hsgsasl_VERSION_PATCH"-	hsgsasl_VERSION_PATCH :: F.CInt--foreign import ccall "hsgsasl_check_version"-	hsgsasl_check_version :: IO F.CInt--foreign import ccall "gsasl.h gsasl_init"-	gsasl_init :: F.Ptr (F.Ptr Context) -> IO F.CInt--foreign import ccall "gsasl.h gsasl_done"-	gsasl_done :: F.Ptr Context -> IO ()--foreign import ccall "gsasl.h gsasl_check_version"-	gsasl_check_version :: F.CString -> IO F.CString--foreign import ccall "gsasl.h gsasl_callback_set"-	gsasl_callback_set :: F.Ptr Context -> F.FunPtr CallbackFn -> IO ()--foreign import ccall "gsasl.h gsasl_callback_hook_get"-	gsasl_callback_hook_get :: F.Ptr Context -> IO (F.Ptr a)--foreign import ccall "gsasl.h gsasl_callback_hook_set"-	gsasl_callback_hook_set :: F.Ptr Context -> F.Ptr a -> IO ()--foreign import ccall "gsasl.h gsasl_session_hook_get"-	gsasl_session_hook_get :: F.Ptr SessionCtx -> IO (F.Ptr a)--foreign import ccall "gsasl.h gsasl_session_hook_set"-	gsasl_session_hook_set :: F.Ptr SessionCtx -> F.Ptr a -> IO ()--foreign import ccall "gsasl.h gsasl_property_set"-	gsasl_property_set :: F.Ptr SessionCtx -> F.CInt -> F.CString -> IO ()--foreign import ccall safe "gsasl.h gsasl_property_get"-	gsasl_property_get :: F.Ptr SessionCtx -> F.CInt -> IO F.CString--foreign import ccall "gsasl.h gsasl_property_fast"-	gsasl_property_fast :: F.Ptr SessionCtx -> F.CInt -> IO F.CString--foreign import ccall "gsasl.h gsasl_client_mechlist"-	gsasl_client_mechlist :: F.Ptr Context -> F.Ptr F.CString -> IO F.CInt--foreign import ccall "gsasl.h gsasl_client_support_p"-	gsasl_client_support_p :: F.Ptr Context -> F.CString -> IO F.CInt--foreign import ccall "gsasl.h gsasl_client_suggest_mechanism"-	gsasl_client_suggest_mechanism :: F.Ptr Context -> F.CString -> IO F.CString--foreign import ccall "gsasl.h gsasl_server_mechlist"-	gsasl_server_mechlist :: F.Ptr Context -> F.Ptr F.CString -> IO F.CInt--foreign import ccall "gsasl.h gsasl_server_support_p"-	gsasl_server_support_p :: F.Ptr Context -> F.CString -> IO F.CInt--foreign import ccall safe "gsasl.h gsasl_client_start"-	gsasl_client_start :: SessionProc--foreign import ccall safe "gsasl.h gsasl_server_start"-	gsasl_server_start :: SessionProc--foreign import ccall safe "gsasl.h gsasl_step"-	gsasl_step :: F.Ptr SessionCtx -> F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt--foreign import ccall safe "gsasl.h gsasl_step64"-	gsasl_step64 :: F.Ptr SessionCtx -> F.CString -> F.Ptr F.CString -> IO F.CInt--foreign import ccall safe "gsasl.h gsasl_finish"-	gsasl_finish :: F.Ptr SessionCtx -> IO ()--foreign import ccall safe "gsasl.h gsasl_encode"-	gsasl_encode :: F.Ptr SessionCtx -> F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt--foreign import ccall safe "gsasl.h gsasl_decode"-	gsasl_decode :: F.Ptr SessionCtx -> F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt--foreign import ccall "gsasl.h gsasl_mechanism_name"-	gsasl_mechanism_name :: F.Ptr SessionCtx -> IO F.CString--foreign import ccall "gsasl.h gsasl_strerror"-	gsasl_strerror :: F.CInt -> IO F.CString--foreign import ccall "gsasl.h gsasl_base64_to"-	gsasl_base64_to :: F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt--foreign import ccall "gsasl.h gsasl_base64_from"-	gsasl_base64_from :: F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt--foreign import ccall "gsasl.h gsasl_md5"-	gsasl_md5 :: F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt--foreign import ccall "gsasl.h gsasl_sha1"-	gsasl_sha1 :: F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt--foreign import ccall "gsasl.h gsasl_hmac_md5"-	gsasl_hmac_md5 :: F.CString -> F.CSize -> F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt--foreign import ccall "gsasl.h gsasl_hmac_sha1"-	gsasl_hmac_sha1 :: F.CString -> F.CSize -> F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt--foreign import ccall "gsasl.h gsasl_nonce"-	gsasl_nonce :: F.CString -> F.CSize -> IO F.CInt--foreign import ccall "gsasl.h gsasl_random"-	gsasl_random :: F.CString -> F.CSize -> IO F.CInt--foreign import ccall "gsasl.h gsasl_free"-	gsasl_free :: F.Ptr a -> IO ()---- }}}

@@ -0,0 +1,13 @@+#include <gsasl.h>++int hsgsasl_VERSION_MAJOR()+{ return GSASL_VERSION_MAJOR; }++int hsgsasl_VERSION_MINOR()+{ return GSASL_VERSION_MINOR; }++int hsgsasl_VERSION_PATCH()+{ return GSASL_VERSION_PATCH; }++int hsgsasl_check_version ()+{ return gsasl_check_version (GSASL_VERSION) != NULL; }

@@ -1,30 +1,38 @@ name: gsasl-version: 0.3.2-synopsis: Bindings for GNU SASL+version: 0.3.3 license: GPL-3-license-file: License.txt-author: John Millikin-maintainer: jmillikin@gmail.com+license-file: license.txt+author: John Millikin <jmillikin@gmail.com>+maintainer: John Millikin <jmillikin@gmail.com> build-type: Simple-cabal-version: >=1.6+cabal-version: >= 1.6 category: Network-stability: unstable+stability: experimental+homepage: https://john-millikin.com/software/haskell-gsasl/ bug-reports: mailto:jmillikin@gmail.com-homepage: http://ianen.org/haskell/bindings/gsasl/-tested-with: GHC==6.12.1 +synopsis: Bindings for GNU SASL+description:+ source-repository head-  type: darcs-  location: http://ianen.org/haskell/bindings/gsasl/+  type: bazaar+  location: https://john-millikin.com/branches/haskell-gsasl/0.3/ +source-repository this+  type: bazaar+  location: https://john-millikin.com/branches/haskell-gsasl/0.3/+  tag: haskell-gsasl_0.3.3+ library+  ghc-options: -Wall -O2+  hs-source-dirs: lib+  c-sources: cbits/hsgsasl-shim.c+   build-depends:-      base >=3 && < 5+      base >= 4.0 && < 5.0     , transformers >= 0.2 && < 0.3     , bytestring >= 0.9 && < 0.10 -  exposed-modules: Network.Protocol.SASL.GNU--  ghc-options: -Wall -fno-warn-unused-do-bind   pkgconfig-depends: libgsasl >= 1.1-  c-sources: hsgsasl-shim.c++  exposed-modules: Network.Protocol.SASL.GNU

@@ -1,13 +0,0 @@-#include <gsasl.h>--int hsgsasl_VERSION_MAJOR()-{ return GSASL_VERSION_MAJOR; }--int hsgsasl_VERSION_MINOR()-{ return GSASL_VERSION_MINOR; }--int hsgsasl_VERSION_PATCH()-{ return GSASL_VERSION_PATCH; }--int hsgsasl_check_version ()-{ return gsasl_check_version (GSASL_VERSION) != NULL; }

@@ -0,0 +1,980 @@+-- Copyright (C) 2010 John Millikin <jmillikin@gmail.com>+-- +-- This program is free software: you can redistribute it and/or modify+-- it under the terms of the GNU General Public License as published by+-- the Free Software Foundation, either version 3 of the License, or+-- any later version.+-- +-- This program is distributed in the hope that it will be useful,+-- but WITHOUT ANY WARRANTY; without even the implied warranty of+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the+-- GNU General Public License for more details.+-- +-- You should have received a copy of the GNU General Public License+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.++{-# LANGUAGE ForeignFunctionInterface #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE DeriveDataTypeable #-}+{-# LANGUAGE CPP #-}+module Network.Protocol.SASL.GNU+	(+	-- * Library Information+	  headerVersion+	, libraryVersion+	, checkVersion+	+	-- * SASL Contexts+	, SASL+	, runSASL+	, setCallback+	, runCallback+	+	-- * Mechanisms+	, Mechanism (..)+	, clientMechanisms+	, clientSupports+	, clientSuggestMechanism+	, serverMechanisms+	, serverSupports+	+	-- * SASL Sessions+	, Session+	, runClient+	, runServer+	, mechanismName+	+	-- ** Session Properties+	, Property (..)+	, setProperty+	, getProperty+	, getPropertyFast+	+	-- ** Session IO+	, Progress (..)+	, step+	, step64+	, encode+	, decode+	+	-- ** Error handling+	, Error (..)+	, catch+	, handle+	, try+	, throw+	+	-- * Bundled codecs+	, toBase64+	, fromBase64+	, md5+	, sha1+	, hmacMD5+	, hmacSHA1+	, nonce+	, random+	) where++-- Imports {{{++import Prelude hiding (catch)+import qualified Control.Exception as E+import qualified Data.ByteString as B+import qualified Data.ByteString.Unsafe as B+import Data.ByteString.Char8 ()+import Data.Char (isDigit)+import Data.Typeable (Typeable)+import Data.String (IsString, fromString)+import qualified Foreign as F+import qualified Foreign.C as F+import System.IO.Unsafe (unsafePerformIO)+import Control.Monad (when, unless)+import Control.Monad.IO.Class (MonadIO, liftIO)+import qualified Control.Monad.Trans.Reader as R+import qualified Text.ParserCombinators.ReadP as P++-- }}}++-- Library Information {{{++-- | Which version of @gsasl.h@ this module was compiled against+headerVersion :: (Integer, Integer, Integer)+headerVersion = (major, minor, patch) where+	major = toInteger hsgsasl_VERSION_MAJOR+	minor = toInteger hsgsasl_VERSION_MINOR+	patch = toInteger hsgsasl_VERSION_PATCH++-- | Which version of @libgsasl.so@ is loaded+libraryVersion :: IO (Integer, Integer, Integer)+libraryVersion = io where+	parseVersion str = case P.readP_to_S parser str of+		[] -> Nothing+		((parsed, _):_) -> Just parsed+	parser = do+		majorS <- P.munch1 isDigit+		_ <- P.char '.'+		minorS <- P.munch1 isDigit+		_ <- P.char '.'+		patchS <- P.munch1 isDigit+		eof+		return (read majorS, read minorS, read patchS)+	io = do+		cstr <- gsasl_check_version F.nullPtr+		maybeStr <- F.maybePeek F.peekCString cstr+		return $ case maybeStr >>= parseVersion of+			Just version -> version+			Nothing -> error $ "Invalid version string: " ++ show maybeStr+	+#if MIN_VERSION_base(4,2,0)+	eof = P.eof+#else+	eof = do+		s <- P.look+		unless (null s) P.pfail+#endif++-- | Whether the header and library versions are compatible+checkVersion :: IO Bool+checkVersion = fmap (== 1) hsgsasl_check_version++-- }}}++-- SASL Contexts {{{++newtype Context = Context (F.Ptr Context)+newtype SASL a = SASL { unSASL :: R.ReaderT Context IO a }++instance Functor SASL where+	fmap f = SASL . fmap f . unSASL++instance Monad SASL where+	return = SASL . return+	(>>=) sasl f = SASL $ unSASL sasl >>= unSASL . f++instance MonadIO SASL where+	liftIO = SASL . liftIO++-- TODO: more instances++runSASL :: SASL a -> IO a+runSASL = withContext . R.runReaderT . unSASL++withContext :: (Context -> IO a) -> IO a+withContext = E.bracket newContext freeContext where+	newContext = F.alloca $ \pCtxt -> do+		gsasl_init pCtxt >>= checkRC+		Context `fmap` F.peek pCtxt+	freeContext (Context ctx) = do+		hook <- gsasl_callback_hook_get ctx+		gsasl_done ctx+		freeCallbackHook hook++getContext :: SASL (F.Ptr Context)+getContext = SASL $ do+	Context ptr <- R.ask+	return ptr++bracketSASL :: (F.Ptr Context -> IO a) -> (a -> IO b) -> (a -> IO c) -> SASL c+bracketSASL before after thing = do+	ctx <- getContext+	liftIO $ E.bracket (before ctx) after thing++-- }}}++-- Mechanisms {{{++newtype Mechanism = Mechanism B.ByteString+	deriving (Show, Eq)++instance IsString Mechanism where+	fromString = Mechanism . fromString++-- | A list of 'Mechanism's supported by the @libgsasl@ client.+clientMechanisms :: SASL [Mechanism]+clientMechanisms = bracketSASL io gsasl_free splitMechListPtr where+	io ctx = F.alloca $ \pStr -> do+		gsasl_client_mechlist ctx pStr >>= checkRC+		F.peek pStr++-- | Whether there is client-side support for a specified 'Mechanism'.+clientSupports :: Mechanism -> SASL Bool+clientSupports (Mechanism name) = do+	ctx <- getContext+	liftIO $ B.useAsCString name $ \pName -> do+		cres <- gsasl_client_support_p ctx pName+		return $ cres == 1++-- | Given a list of 'Mechanism's, suggest which to use (or 'Nothing' if+-- no supported 'Mechanism' is found).+clientSuggestMechanism :: [Mechanism] -> SASL (Maybe Mechanism)+clientSuggestMechanism mechs = do+	let bytes = B.intercalate " " [x | Mechanism x <- mechs]+	ctx <- getContext+	liftIO $ B.useAsCString bytes $ \pMechlist ->+		gsasl_client_suggest_mechanism ctx pMechlist >>=+		F.maybePeek (fmap Mechanism . B.packCString)++-- | A list of 'Mechanism's supported by the @libgsasl@ server.+serverMechanisms :: SASL [Mechanism]+serverMechanisms = bracketSASL io gsasl_free splitMechListPtr where+	io ctx = F.alloca $ \pStr -> do+		gsasl_server_mechlist ctx pStr >>= checkRC+		F.peek pStr++-- | Whether there is server-side support for a specified 'Mechanism'.+serverSupports :: Mechanism -> SASL Bool+serverSupports (Mechanism name) = do+	ctx <- getContext+	liftIO $ B.useAsCString name $ \pName -> do+		cres <- gsasl_server_support_p ctx pName+		return $ cres == 1++splitMechListPtr :: F.CString -> IO [Mechanism]+splitMechListPtr ptr = unfoldrM step' (ptr, ptr, 0, True) where+	step' (_, _, _, False) = return Nothing+	step' (p_0, p_i, i, _) = F.peek p_i >>= \chr -> let+		p_i' = F.plusPtr p_i 1+		peek continue = if i == 0+			then step' (p_i', p_i', 0, continue)+			else do+				bytes <- B.packCStringLen (p_0, i)+				return $ Just (Mechanism bytes, (p_i', p_i', 0, continue))+		in case chr of+			0x00 -> peek False+			0x20 -> peek True+			_    -> step' (p_0, p_i', i + 1, True)++-- }}}++-- SASL Sessions {{{++newtype SessionCtx = SessionCtx (F.Ptr SessionCtx)+newtype Session a = Session { unSession :: R.ReaderT SessionCtx IO a }++instance Functor Session where+	fmap f = Session . fmap f . unSession++instance Monad Session where+	return = Session . return+	(>>=) m f = Session $ unSession m >>= unSession . f++instance MonadIO Session where+	liftIO = Session . liftIO++type SessionProc = F.Ptr Context -> F.CString -> F.Ptr (F.Ptr SessionCtx) -> IO F.CInt++runSession :: SessionProc -> Mechanism -> Session a -> SASL (Either Error a)+runSession start (Mechanism mech) session = bracketSASL newSession freeSession io where+	newSession ctx =+		B.useAsCString mech $ \pMech ->+		F.alloca $ \pSessionCtx -> E.handle noSession $ do+		start ctx pMech pSessionCtx >>= checkRC+		fmap (Right . SessionCtx) $ F.peek pSessionCtx+	noSession (SASLException err) = return $ Left err+	+	freeSession (Left _) = return ()+	freeSession (Right (SessionCtx ptr)) = gsasl_finish ptr+	+	io (Left err) = return $ Left err+	io (Right sctx) = E.catch+		(fmap Right $ R.runReaderT (unSession session) sctx)+		(\(SASLException err) -> return $ Left err)++-- | Run a session using the @libgsasl@ client.+runClient :: Mechanism -> Session a -> SASL (Either Error a)+runClient = runSession gsasl_client_start++-- | Run a session using the @libgsasl@ server.+runServer :: Mechanism -> Session a -> SASL (Either Error a)+runServer = runSession gsasl_server_start++getSessionContext :: Session (F.Ptr SessionCtx)+getSessionContext = Session $ do+	SessionCtx sctx <- R.ask+	return sctx++-- | The name of the session's SASL mechanism.+mechanismName :: Session Mechanism+mechanismName = do+	sctx <- getSessionContext+	liftIO $ do+		cstr <- gsasl_mechanism_name sctx+		Mechanism `fmap` B.packCString cstr++bracketSession :: (F.Ptr SessionCtx -> IO a) -> (a -> IO b) -> (a -> IO c) -> Session c+bracketSession before after thing = do+	sctx <- getSessionContext+	liftIO $ E.bracket (before sctx) after thing++-- }}}++-- Error handling {{{++data Error+	= UnknownMechanism+	| MechanismCalledTooManyTimes+	| MallocError+	| Base64Error+	| CryptoError+	| SASLPrepError+	| MechanismParseError+	| AuthenticationError+	| IntegrityError+	| NoClientCode+	| NoServerCode+	| NoCallback+	| NoAnonymousToken+	| NoAuthID+	| NoAuthzID+	| NoPassword+	| NoPasscode+	| NoPIN+	| NoService+	| NoHostname+	+	| GSSAPI_ReleaseBufferError+	| GSSAPI_ImportNameError+	| GSSAPI_InitSecContextError+	| GSSAPI_AcceptSecContextError+	| GSSAPI_UnwrapError+	| GSSAPI_WrapError+	| GSSAPI_AquireCredError+	| GSSAPI_DisplayNameError+	| GSSAPI_UnsupportedProtectionError+	| GSSAPI_EncapsulateTokenError+	| GSSAPI_DecapsulateTokenError+	| GSSAPI_InquireMechForSASLNameError+	| GSSAPI_TestOIDSetMemberError+	| GSSAPI_ReleaseOIDSetError+	+	| KerberosV5_InitError+	| KerberosV5_InternalError+	+	| SecurID_ServerNeedAdditionalPasscode+	| SecurID_ServerNeedNewPIN++instance Show Error where+	show = strError++-- | Convert an error code to a human-readable string explanation for the+-- particular error code.+--+-- This string can be used to output a diagnostic message to the user.+strError :: Error -> String+strError err = unsafePerformIO $ gsasl_strerror (cFromError err) >>= F.peekCString++data SASLException = SASLException Error+	deriving (Show, Typeable)++instance E.Exception SASLException++cFromError :: Error -> F.CInt+cFromError e = case e of+	UnknownMechanism -> 2+	MechanismCalledTooManyTimes -> 3+	MallocError -> 7+	Base64Error -> 8+	CryptoError -> 9+	SASLPrepError -> 29+	MechanismParseError -> 30+	AuthenticationError -> 31+	IntegrityError -> 33+	NoClientCode -> 35+	NoServerCode -> 36+	NoCallback -> 51+	NoAnonymousToken -> 52+	NoAuthID -> 53+	NoAuthzID -> 54+	NoPassword -> 55+	NoPasscode -> 56+	NoPIN -> 57+	NoService -> 58+	NoHostname -> 59+	GSSAPI_ReleaseBufferError -> 37+	GSSAPI_ImportNameError -> 38+	GSSAPI_InitSecContextError -> 39+	GSSAPI_AcceptSecContextError -> 40+	GSSAPI_UnwrapError -> 41+	GSSAPI_WrapError -> 42+	GSSAPI_AquireCredError -> 43+	GSSAPI_DisplayNameError -> 44+	GSSAPI_UnsupportedProtectionError -> 45+	GSSAPI_EncapsulateTokenError -> 60+	GSSAPI_DecapsulateTokenError -> 61+	GSSAPI_InquireMechForSASLNameError -> 62+	GSSAPI_TestOIDSetMemberError -> 63+	GSSAPI_ReleaseOIDSetError -> 64+	KerberosV5_InitError -> 46+	KerberosV5_InternalError -> 47+	SecurID_ServerNeedAdditionalPasscode -> 48+	SecurID_ServerNeedNewPIN -> 49++cToError :: F.CInt -> Error+cToError x = case x of+	2 -> UnknownMechanism+	3 -> MechanismCalledTooManyTimes+	7 -> MallocError+	8 -> Base64Error+	9 -> CryptoError+	29 -> SASLPrepError+	30 -> MechanismParseError+	31 -> AuthenticationError+	33 -> IntegrityError+	35 -> NoClientCode+	36 -> NoServerCode+	51 -> NoCallback+	52 -> NoAnonymousToken +	53 -> NoAuthID+	54 -> NoAuthzID+	55 -> NoPassword+	56 -> NoPasscode+	57 -> NoPIN+	58 -> NoService+	59 -> NoHostname+	37 -> GSSAPI_ReleaseBufferError+	38 -> GSSAPI_ImportNameError+	39 -> GSSAPI_InitSecContextError+	40 -> GSSAPI_AcceptSecContextError+	41 -> GSSAPI_UnwrapError+	42 -> GSSAPI_WrapError+	43 -> GSSAPI_AquireCredError+	44 -> GSSAPI_DisplayNameError+	45 -> GSSAPI_UnsupportedProtectionError+	60 -> GSSAPI_EncapsulateTokenError+	61 -> GSSAPI_DecapsulateTokenError+	62 -> GSSAPI_InquireMechForSASLNameError+	63 -> GSSAPI_TestOIDSetMemberError+	64 -> GSSAPI_ReleaseOIDSetError+	46 -> KerberosV5_InitError+	47 -> KerberosV5_InternalError+	48 -> SecurID_ServerNeedAdditionalPasscode+	49 -> SecurID_ServerNeedNewPIN+	_ -> error $ "Unknown GNU SASL return code: " ++ show x++throw :: Error -> Session a+throw = liftIO . E.throwIO . SASLException++catch :: Session a -> (Error -> Session a) -> Session a+catch m f = do+	sctx <- SessionCtx `fmap` getSessionContext+	Session . liftIO $ E.catch+		(R.runReaderT (unSession m) sctx)+		(\(SASLException err) -> R.runReaderT (unSession (f err)) sctx)++handle :: (Error -> Session a) -> Session a -> Session a+handle = flip catch++try :: Session a -> Session (Either Error a)+try m = catch (fmap Right m) (return . Left)++-- }}}++-- Session Properties {{{++data Property+	= PropertyAuthID+	| PropertyAuthzID+	| PropertyPassword+	| PropertyAnonymousToken+	| PropertyService+	| PropertyHostname+	| PropertyGSSAPIDisplayName+	| PropertyPasscode+	| PropertySuggestedPIN+	| PropertyPIN+	| PropertyRealm+	| PropertyDigestMD5HashedPassword+	| PropertyQOPS+	| PropertyQOP+	| PropertyScramIter+	| PropertyScramSalt+	| PropertyScramSaltedPassword+	+	| ValidateSimple+	| ValidateExternal+	| ValidateAnonymous+	| ValidateGSSAPI+	| ValidateSecurID+	deriving (Show, Eq)++cFromProperty :: Property -> F.CInt+cFromProperty x = case x of+	PropertyAuthID -> 1+	PropertyAuthzID -> 2+	PropertyPassword -> 3+	PropertyAnonymousToken -> 4+	PropertyService -> 5+	PropertyHostname -> 6+	PropertyGSSAPIDisplayName -> 7+	PropertyPasscode -> 8+	PropertySuggestedPIN -> 9+	PropertyPIN -> 10+	PropertyRealm -> 11+	PropertyDigestMD5HashedPassword -> 12+	PropertyQOPS -> 13+	PropertyQOP -> 14+	PropertyScramIter -> 15+	PropertyScramSalt -> 16+	PropertyScramSaltedPassword -> 17+	ValidateSimple -> 500+	ValidateExternal -> 501+	ValidateAnonymous -> 502+	ValidateGSSAPI -> 503+	ValidateSecurID -> 504++cToProperty :: F.CInt -> Property+cToProperty x = case x of+	1 -> PropertyAuthID+	2 -> PropertyAuthzID+	3 -> PropertyPassword+	4 -> PropertyAnonymousToken+	5 -> PropertyService+	6 -> PropertyHostname+	7 -> PropertyGSSAPIDisplayName+	8 -> PropertyPasscode+	9 -> PropertySuggestedPIN+	10 -> PropertyPIN+	11 -> PropertyRealm+	12 -> PropertyDigestMD5HashedPassword+	13 -> PropertyQOPS+	14 -> PropertyQOP+	15 -> PropertyScramIter+	16 -> PropertyScramSalt+	17 -> PropertyScramSaltedPassword+	500 -> ValidateSimple+	501 -> ValidateExternal+	502 -> ValidateAnonymous+	503 -> ValidateGSSAPI+	504 -> ValidateSecurID+	_   -> error $ "Unknown GNU SASL property code: " ++ show x++-- | Store some data in the session for the given property. The data must+-- be @NULL@-terminated.+setProperty :: Property -> B.ByteString -> Session ()+setProperty prop bytes = do+	sctx <- getSessionContext+	liftIO $+		B.useAsCString bytes $+		gsasl_property_set sctx (cFromProperty prop)++-- | Retrieve the data stored in the session for the given property,+-- possibly invoking the current callback to get the value.+getProperty :: Property -> Session (Maybe B.ByteString)+getProperty prop = do+	sctx <- getSessionContext+	liftIO $ do+		cstr <- gsasl_property_get sctx (cFromProperty prop)+		if cstr /= F.nullPtr+			then fmap Just $ B.packCString cstr+			else do+				liftIO $ checkCallbackException sctx+				return Nothing++-- | Retrieve the data stored in the session for the given property,+-- without invoking the current callback.+getPropertyFast :: Property -> Session (Maybe B.ByteString)+getPropertyFast prop = do+	sctx <- getSessionContext+	liftIO $+		gsasl_property_fast sctx (cFromProperty prop) >>=+		F.maybePeek B.packCString++-- }}}++-- Callbacks {{{++type CallbackFn = F.Ptr Context -> F.Ptr SessionCtx -> F.CInt -> IO F.CInt+data CallbackHook = CallbackHook (F.FunPtr CallbackFn) (Property -> Session Progress)++newCallbackHook :: (Property -> Session Progress) -> IO (F.Ptr CallbackHook, F.FunPtr CallbackFn)+newCallbackHook cb = E.bracketOnError+	(wrapCallbackImpl (callbackImpl cb))+	F.freeHaskellFunPtr+	(\funPtr -> let hook = CallbackHook funPtr cb in E.bracketOnError+		(F.newStablePtr hook)+		F.freeStablePtr+		(\stablePtr -> let+			hookPtr = F.castPtr (F.castStablePtrToPtr stablePtr)+			in return (hookPtr, funPtr)))++freeCallbackHook :: F.Ptr CallbackHook -> IO ()+freeCallbackHook ptr = unless (ptr == F.nullPtr) $ do+	let stablePtr = F.castPtrToStablePtr $ F.castPtr ptr+	hook <- F.deRefStablePtr stablePtr+	F.freeStablePtr stablePtr+	let (CallbackHook funPtr _) = hook+	F.freeHaskellFunPtr funPtr++callbackImpl :: (Property -> Session Progress) -> CallbackFn+callbackImpl cb _ sctx cProp = let+	globalIO = error "globalIO is not implemented"+	+	sessionIO = do+		let session = cb $ cToProperty cProp+		fmap cFromProgress $ R.runReaderT (unSession session) (SessionCtx sctx)+	+	onError :: SASLException -> IO F.CInt+	onError (SASLException err) = return $ cFromError err+	+	onException :: E.SomeException -> IO F.CInt+	onException exc = do+		-- A bit ugly; session hooks aren't used anywhere else in+		-- the binding, so the exception is stashed here.+		stablePtr <- F.newStablePtr exc+		gsasl_session_hook_set sctx $ F.castStablePtrToPtr stablePtr+		+		-- standard libgsasl return codes are all >= 0, so using -1+		-- provides an easy way to determine later whether the+		-- exception came from Haskell code.+		return (-1)+	+	catchErrors io = E.catches io [E.Handler onError, E.Handler onException]+	+	in catchErrors $ if sctx == F.nullPtr then globalIO else sessionIO++foreign import ccall "wrapper"+	wrapCallbackImpl :: CallbackFn -> IO (F.FunPtr CallbackFn)++-- Used to check whether a callback threw an exception+checkCallbackException :: F.Ptr SessionCtx -> IO ()+checkCallbackException sctx = do+	hook <- gsasl_session_hook_get sctx+	when (hook /= F.nullPtr) $ do+		let stable = F.castPtrToStablePtr hook+		exc <- F.deRefStablePtr stable+		F.freeStablePtr stable+		E.throwIO (exc :: E.SomeException)++-- | Set the current SASL callback. The callback will be used by mechanisms+-- to discover various parameters, such as usernames and passwords.+setCallback :: (Property -> Session Progress) -> SASL ()+setCallback cb = do+	ctx <- getContext+	liftIO $ do+		freeCallbackHook =<< gsasl_callback_hook_get ctx+		(hook, cbPtr) <- newCallbackHook cb+		gsasl_callback_hook_set ctx hook+		gsasl_callback_set ctx cbPtr++-- | Run the current callback; the property indicates what action the+-- callback is expected to perform.+runCallback :: Property -> Session Progress+runCallback prop = do+	-- This is a bit evil; the first field in Gsasl_session is a Gsasl context,+	-- so it's safe to cast here (assuming they never change the layout).+	ctx <- fmap F.castPtr getSessionContext+	hookPtr <- liftIO $ gsasl_callback_hook_get ctx+	when (hookPtr == F.nullPtr) $ throw NoCallback+	hook <- liftIO $ F.deRefStablePtr $ F.castPtrToStablePtr hookPtr+	let (CallbackHook _ cb) = hook+	cb prop++-- }}}++-- Session IO {{{++data Progress = Complete | NeedsMore+	deriving (Show, Eq)++cFromProgress :: Progress -> F.CInt+cFromProgress x = case x of+	Complete -> 0+	NeedsMore -> 1++-- | Perform one step of SASL authentication. This reads data from the other+-- end, processes it (potentially running the callback), and returns data+-- to be sent back.+--+-- Also returns 'NeedsMore' if authentication is not yet complete.+step :: B.ByteString -> Session (B.ByteString, Progress)+step input = bracketSession get free peek where+	get sctx =+		B.unsafeUseAsCStringLen input $ \(pInput, inputLen) ->+		F.alloca $ \pOutput ->+		F.alloca $ \pOutputLen -> do+		rc <- gsasl_step sctx pInput (fromIntegral inputLen) pOutput pOutputLen+		when (rc /= 0) $ checkCallbackException sctx+		progress <- checkStepRC rc+		cstr <- F.peek pOutput+		cstrLen <- F.peek pOutputLen+		return (cstr, cstrLen, progress)+	+	free (cstr, _, _) = gsasl_free cstr+	peek (cstr, cstrLen, progress) = do+		output <- B.packCStringLen (cstr, fromIntegral cstrLen)+		return (output, progress)++-- | A simple wrapper around 'step' which uses base64 to decode the input+-- and encode the output.+step64 :: B.ByteString -> Session (B.ByteString, Progress)+step64 input = bracketSession get free peek where+	get sctx =+		B.useAsCString input $ \pInput ->+		F.alloca $ \pOutput -> do+		rc <- gsasl_step64 sctx pInput pOutput+		when (rc /= 0) $ checkCallbackException sctx+		progress <- checkStepRC rc+		cstr <- F.peek pOutput+		return (cstr, progress)+	+	free (cstr, _) = gsasl_free cstr+	peek (cstr, progress) = do+		output <- B.packCString cstr+		return (output, progress)++checkStepRC :: F.CInt -> IO Progress+checkStepRC x = case x of+	0 -> return Complete+	1 -> return NeedsMore+	_ -> E.throwIO (SASLException (cToError x))++-- | Encode data according to the negotiated SASL mechanism. This might mean+-- the data is integrity or privacy protected.+encode :: B.ByteString -> Session B.ByteString+encode input = do+	sctx <- getSessionContext+	liftIO $+		B.unsafeUseAsCStringLen input $ \(cstr, cstrLen) ->+		F.alloca $ \pOutput ->+		F.alloca $ \pOutputLen -> do+			rc <- gsasl_encode sctx cstr (fromIntegral cstrLen) pOutput pOutputLen+			when (rc /= 0) $ checkCallbackException sctx+			checkRC rc+			output <- F.peek pOutput+			outputLen <- fromIntegral `fmap` F.peek pOutputLen+			outBytes <- B.packCStringLen (output, outputLen)+			gsasl_free output+			return outBytes++-- | Decode data according to the negotiated SASL mechanism. This might mean+-- the data is integrity or privacy protected.+decode :: B.ByteString -> Session B.ByteString+decode input = do+	sctx <- getSessionContext+	liftIO $+		B.unsafeUseAsCStringLen input $ \(cstr, cstrLen) ->+		F.alloca $ \pOutput ->+		F.alloca $ \pOutputLen -> do+			rc <- gsasl_decode sctx cstr (fromIntegral cstrLen) pOutput pOutputLen+			when (rc /= 0) $ checkCallbackException sctx+			checkRC rc+			output <- F.peek pOutput+			outputLen <- fromIntegral `fmap` F.peek pOutputLen+			outputBytes <- B.packCStringLen (output, outputLen)+			gsasl_free output+			return outputBytes++-- }}}++-- Bundled codecs {{{++toBase64 :: B.ByteString -> B.ByteString+toBase64 input = unsafePerformIO $+	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->+	F.alloca $ \pOut ->+	F.alloca $ \pOutLen -> do+	gsasl_base64_to pIn (fromIntegral inLen) pOut pOutLen >>= checkRC+	outLen <- F.peek pOutLen+	outPtr <- F.peek pOut+	B.packCStringLen (outPtr, fromIntegral outLen)++fromBase64 :: B.ByteString -> B.ByteString+fromBase64 input = unsafePerformIO $+	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->+	F.alloca $ \pOut ->+	F.alloca $ \pOutLen -> do+	gsasl_base64_from pIn (fromIntegral inLen) pOut pOutLen >>= checkRC+	outLen <- F.peek pOutLen+	outPtr <- F.peek pOut+	B.packCStringLen (outPtr, fromIntegral outLen)++md5 :: B.ByteString -> B.ByteString+md5 input = unsafePerformIO $+	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->+	F.alloca $ \pOut ->+	F.allocaBytes 16 $ \outBuf -> do+	F.poke pOut outBuf+	gsasl_md5 pIn (fromIntegral inLen) pOut >>= checkRC+	B.packCStringLen (outBuf, 16)++sha1 :: B.ByteString -> B.ByteString+sha1 input = unsafePerformIO $+	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->+	F.alloca $ \pOut ->+	F.allocaBytes 20 $ \outBuf -> do+	F.poke pOut outBuf+	gsasl_sha1 pIn (fromIntegral inLen) pOut >>= checkRC+	B.packCStringLen (outBuf, 20)++hmacMD5 :: B.ByteString -- ^ Key+        -> B.ByteString -- ^ Input data+        -> B.ByteString+hmacMD5 key input = unsafePerformIO $+	B.unsafeUseAsCStringLen key $ \(pKey, keyLen) ->+	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->+	F.alloca $ \pOut ->+	F.allocaBytes 16 $ \outBuf -> do+	F.poke pOut outBuf+	gsasl_hmac_md5 pKey (fromIntegral keyLen) pIn (fromIntegral inLen) pOut >>= checkRC+	B.packCStringLen (outBuf, 16)++hmacSHA1 :: B.ByteString -- ^ Key+         -> B.ByteString -- ^ Input data+         -> B.ByteString+hmacSHA1 key input = unsafePerformIO $+	B.unsafeUseAsCStringLen key $ \(pKey, keyLen) ->+	B.unsafeUseAsCStringLen input $ \(pIn, inLen) ->+	F.alloca $ \pOut ->+	F.allocaBytes 20 $ \outBuf -> do+	F.poke pOut outBuf+	gsasl_hmac_sha1 pKey (fromIntegral keyLen) pIn (fromIntegral inLen) pOut >>= checkRC+	B.packCStringLen (outBuf, 20)++-- | Returns unpredictable data of a given size+nonce :: Integer -> IO B.ByteString+nonce size = F.allocaBytes (fromInteger size) $ \buf -> do+	gsasl_nonce buf (fromIntegral size) >>= checkRC+	B.packCStringLen (buf, fromIntegral size)++-- | Returns cryptographically strong random data of a given size+random :: Integer -> IO B.ByteString+random size = F.allocaBytes (fromInteger size) $ \buf -> do+	gsasl_random buf (fromIntegral size) >>= checkRC+	B.packCStringLen (buf, fromIntegral size)+++-- }}}++-- Miscellaneous {{{++checkRC :: F.CInt -> IO ()+checkRC x = case x of+	0 -> return ()+	_ -> E.throwIO (SASLException (cToError x))++unfoldrM :: Monad m => (b -> m (Maybe (a, b))) -> b -> m [a]+unfoldrM m b = m b >>= \x -> case x of+	Just (a, new_b) -> do+		as <- unfoldrM m new_b+		return $ a : as+	Nothing -> return []++-- }}}++-- FFI imports {{{++foreign import ccall "hsgsasl_VERSION_MAJOR"+	hsgsasl_VERSION_MAJOR :: F.CInt++foreign import ccall "hsgsasl_VERSION_MINOR"+	hsgsasl_VERSION_MINOR :: F.CInt++foreign import ccall "hsgsasl_VERSION_PATCH"+	hsgsasl_VERSION_PATCH :: F.CInt++foreign import ccall "hsgsasl_check_version"+	hsgsasl_check_version :: IO F.CInt++foreign import ccall "gsasl.h gsasl_init"+	gsasl_init :: F.Ptr (F.Ptr Context) -> IO F.CInt++foreign import ccall "gsasl.h gsasl_done"+	gsasl_done :: F.Ptr Context -> IO ()++foreign import ccall "gsasl.h gsasl_check_version"+	gsasl_check_version :: F.CString -> IO F.CString++foreign import ccall "gsasl.h gsasl_callback_set"+	gsasl_callback_set :: F.Ptr Context -> F.FunPtr CallbackFn -> IO ()++foreign import ccall "gsasl.h gsasl_callback_hook_get"+	gsasl_callback_hook_get :: F.Ptr Context -> IO (F.Ptr a)++foreign import ccall "gsasl.h gsasl_callback_hook_set"+	gsasl_callback_hook_set :: F.Ptr Context -> F.Ptr a -> IO ()++foreign import ccall "gsasl.h gsasl_session_hook_get"+	gsasl_session_hook_get :: F.Ptr SessionCtx -> IO (F.Ptr a)++foreign import ccall "gsasl.h gsasl_session_hook_set"+	gsasl_session_hook_set :: F.Ptr SessionCtx -> F.Ptr a -> IO ()++foreign import ccall "gsasl.h gsasl_property_set"+	gsasl_property_set :: F.Ptr SessionCtx -> F.CInt -> F.CString -> IO ()++foreign import ccall safe "gsasl.h gsasl_property_get"+	gsasl_property_get :: F.Ptr SessionCtx -> F.CInt -> IO F.CString++foreign import ccall "gsasl.h gsasl_property_fast"+	gsasl_property_fast :: F.Ptr SessionCtx -> F.CInt -> IO F.CString++foreign import ccall "gsasl.h gsasl_client_mechlist"+	gsasl_client_mechlist :: F.Ptr Context -> F.Ptr F.CString -> IO F.CInt++foreign import ccall "gsasl.h gsasl_client_support_p"+	gsasl_client_support_p :: F.Ptr Context -> F.CString -> IO F.CInt++foreign import ccall "gsasl.h gsasl_client_suggest_mechanism"+	gsasl_client_suggest_mechanism :: F.Ptr Context -> F.CString -> IO F.CString++foreign import ccall "gsasl.h gsasl_server_mechlist"+	gsasl_server_mechlist :: F.Ptr Context -> F.Ptr F.CString -> IO F.CInt++foreign import ccall "gsasl.h gsasl_server_support_p"+	gsasl_server_support_p :: F.Ptr Context -> F.CString -> IO F.CInt++foreign import ccall safe "gsasl.h gsasl_client_start"+	gsasl_client_start :: SessionProc++foreign import ccall safe "gsasl.h gsasl_server_start"+	gsasl_server_start :: SessionProc++foreign import ccall safe "gsasl.h gsasl_step"+	gsasl_step :: F.Ptr SessionCtx -> F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt++foreign import ccall safe "gsasl.h gsasl_step64"+	gsasl_step64 :: F.Ptr SessionCtx -> F.CString -> F.Ptr F.CString -> IO F.CInt++foreign import ccall safe "gsasl.h gsasl_finish"+	gsasl_finish :: F.Ptr SessionCtx -> IO ()++foreign import ccall safe "gsasl.h gsasl_encode"+	gsasl_encode :: F.Ptr SessionCtx -> F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt++foreign import ccall safe "gsasl.h gsasl_decode"+	gsasl_decode :: F.Ptr SessionCtx -> F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt++foreign import ccall "gsasl.h gsasl_mechanism_name"+	gsasl_mechanism_name :: F.Ptr SessionCtx -> IO F.CString++foreign import ccall "gsasl.h gsasl_strerror"+	gsasl_strerror :: F.CInt -> IO F.CString++foreign import ccall "gsasl.h gsasl_base64_to"+	gsasl_base64_to :: F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt++foreign import ccall "gsasl.h gsasl_base64_from"+	gsasl_base64_from :: F.CString -> F.CSize -> F.Ptr F.CString -> F.Ptr F.CSize -> IO F.CInt++foreign import ccall "gsasl.h gsasl_md5"+	gsasl_md5 :: F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt++foreign import ccall "gsasl.h gsasl_sha1"+	gsasl_sha1 :: F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt++foreign import ccall "gsasl.h gsasl_hmac_md5"+	gsasl_hmac_md5 :: F.CString -> F.CSize -> F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt++foreign import ccall "gsasl.h gsasl_hmac_sha1"+	gsasl_hmac_sha1 :: F.CString -> F.CSize -> F.CString -> F.CSize -> F.Ptr F.CString -> IO F.CInt++foreign import ccall "gsasl.h gsasl_nonce"+	gsasl_nonce :: F.CString -> F.CSize -> IO F.CInt++foreign import ccall "gsasl.h gsasl_random"+	gsasl_random :: F.CString -> F.CSize -> IO F.CInt++foreign import ccall "gsasl.h gsasl_free"+	gsasl_free :: F.Ptr a -> IO ()++-- }}}

@@ -0,0 +1,674 @@+                    GNU GENERAL PUBLIC LICENSE+                       Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++                            Preamble++  The GNU General Public License is a free, copyleft license for+software and other kinds of works.++  The licenses for most software and other practical works are designed+to take away your freedom to share and change the works.  By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users.  We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors.  You can apply it to+your programs, too.++  When we speak of free software, we are referring to freedom, not+price.  Our General Public Licenses are designed to make sure that you+have the freedom to distribute copies of free software (and charge for+them if you wish), that you receive source code or can get it if you+want it, that you can change the software or use pieces of it in new+free programs, and that you know you can do these things.++  To protect your rights, we need to prevent others from denying you+these rights or asking you to surrender the rights.  Therefore, you have+certain responsibilities if you distribute copies of the software, or if+you modify it: responsibilities to respect the freedom of others.++  For example, if you distribute copies of such a program, whether+gratis or for a fee, you must pass on to the recipients the same+freedoms that you received.  You must make sure that they, too, receive+or can get the source code.  And you must show them these terms so they+know their rights.++  Developers that use the GNU GPL protect your rights with two steps:+(1) assert copyright on the software, and (2) offer you this License+giving you legal permission to copy, distribute and/or modify it.++  For the developers' and authors' protection, the GPL clearly explains+that there is no warranty for this free software.  For both users' and+authors' sake, the GPL requires that modified versions be marked as+changed, so that their problems will not be attributed erroneously to+authors of previous versions.++  Some devices are designed to deny users access to install or run+modified versions of the software inside them, although the manufacturer+can do so.  This is fundamentally incompatible with the aim of+protecting users' freedom to change the software.  The systematic+pattern of such abuse occurs in the area of products for individuals to+use, which is precisely where it is most unacceptable.  Therefore, we+have designed this version of the GPL to prohibit the practice for those+products.  If such problems arise substantially in other domains, we+stand ready to extend this provision to those domains in future versions+of the GPL, as needed to protect the freedom of users.++  Finally, every program is threatened constantly by software patents.+States should not allow patents to restrict development and use of+software on general-purpose computers, but in those that do, we wish to+avoid the special danger that patents applied to a free program could+make it effectively proprietary.  To prevent this, the GPL assures that+patents cannot be used to render the program non-free.++  The precise terms and conditions for copying, distribution and+modification follow.++                       TERMS AND CONDITIONS++  0. Definitions.++  "This License" refers to version 3 of the GNU General Public License.++  "Copyright" also means copyright-like laws that apply to other kinds of+works, such as semiconductor masks.++  "The Program" refers to any copyrightable work licensed under this+License.  Each licensee is addressed as "you".  "Licensees" and+"recipients" may be individuals or organizations.++  To "modify" a work means to copy from or adapt all or part of the work+in a fashion requiring copyright permission, other than the making of an+exact copy.  The resulting work is called a "modified version" of the+earlier work or a work "based on" the earlier work.++  A "covered work" means either the unmodified Program or a work based+on the Program.++  To "propagate" a work means to do anything with it that, without+permission, would make you directly or secondarily liable for+infringement under applicable copyright law, except executing it on a+computer or modifying a private copy.  Propagation includes copying,+distribution (with or without modification), making available to the+public, and in some countries other activities as well.++  To "convey" a work means any kind of propagation that enables other+parties to make or receive copies.  Mere interaction with a user through+a computer network, with no transfer of a copy, is not conveying.++  An interactive user interface displays "Appropriate Legal Notices"+to the extent that it includes a convenient and prominently visible+feature that (1) displays an appropriate copyright notice, and (2)+tells the user that there is no warranty for the work (except to the+extent that warranties are provided), that licensees may convey the+work under this License, and how to view a copy of this License.  If+the interface presents a list of user commands or options, such as a+menu, a prominent item in the list meets this criterion.++  1. Source Code.++  The "source code" for a work means the preferred form of the work+for making modifications to it.  "Object code" means any non-source+form of a work.++  A "Standard Interface" means an interface that either is an official+standard defined by a recognized standards body, or, in the case of+interfaces specified for a particular programming language, one that+is widely used among developers working in that language.++  The "System Libraries" of an executable work include anything, other+than the work as a whole, that (a) is included in the normal form of+packaging a Major Component, but which is not part of that Major+Component, and (b) serves only to enable use of the work with that+Major Component, or to implement a Standard Interface for which an+implementation is available to the public in source code form.  A+"Major Component", in this context, means a major essential component+(kernel, window system, and so on) of the specific operating system+(if any) on which the executable work runs, or a compiler used to+produce the work, or an object code interpreter used to run it.++  The "Corresponding Source" for a work in object code form means all+the source code needed to generate, install, and (for an executable+work) run the object code and to modify the work, including scripts to+control those activities.  However, it does not include the work's+System Libraries, or general-purpose tools or generally available free+programs which are used unmodified in performing those activities but+which are not part of the work.  For example, Corresponding Source+includes interface definition files associated with source files for+the work, and the source code for shared libraries and dynamically+linked subprograms that the work is specifically designed to require,+such as by intimate data communication or control flow between those+subprograms and other parts of the work.++  The Corresponding Source need not include anything that users+can regenerate automatically from other parts of the Corresponding+Source.++  The Corresponding Source for a work in source code form is that+same work.++  2. Basic Permissions.++  All rights granted under this License are granted for the term of+copyright on the Program, and are irrevocable provided the stated+conditions are met.  This License explicitly affirms your unlimited+permission to run the unmodified Program.  The output from running a+covered work is covered by this License only if the output, given its+content, constitutes a covered work.  This License acknowledges your+rights of fair use or other equivalent, as provided by copyright law.++  You may make, run and propagate covered works that you do not+convey, without conditions so long as your license otherwise remains+in force.  You may convey covered works to others for the sole purpose+of having them make modifications exclusively for you, or provide you+with facilities for running those works, provided that you comply with+the terms of this License in conveying all material for which you do+not control copyright.  Those thus making or running the covered works+for you must do so exclusively on your behalf, under your direction+and control, on terms that prohibit them from making any copies of+your copyrighted material outside their relationship with you.++  Conveying under any other circumstances is permitted solely under+the conditions stated below.  Sublicensing is not allowed; section 10+makes it unnecessary.++  3. Protecting Users' Legal Rights From Anti-Circumvention Law.++  No covered work shall be deemed part of an effective technological+measure under any applicable law fulfilling obligations under article+11 of the WIPO copyright treaty adopted on 20 December 1996, or+similar laws prohibiting or restricting circumvention of such+measures.++  When you convey a covered work, you waive any legal power to forbid+circumvention of technological measures to the extent such circumvention+is effected by exercising rights under this License with respect to+the covered work, and you disclaim any intention to limit operation or+modification of the work as a means of enforcing, against the work's+users, your or third parties' legal rights to forbid circumvention of+technological measures.++  4. Conveying Verbatim Copies.++  You may convey verbatim copies of the Program's source code as you+receive it, in any medium, provided that you conspicuously and+appropriately publish on each copy an appropriate copyright notice;+keep intact all notices stating that this License and any+non-permissive terms added in accord with section 7 apply to the code;+keep intact all notices of the absence of any warranty; and give all+recipients a copy of this License along with the Program.++  You may charge any price or no price for each copy that you convey,+and you may offer support or warranty protection for a fee.++  5. Conveying Modified Source Versions.++  You may convey a work based on the Program, or the modifications to+produce it from the Program, in the form of source code under the+terms of section 4, provided that you also meet all of these conditions:++    a) The work must carry prominent notices stating that you modified+    it, and giving a relevant date.++    b) The work must carry prominent notices stating that it is+    released under this License and any conditions added under section+    7.  This requirement modifies the requirement in section 4 to+    "keep intact all notices".++    c) You must license the entire work, as a whole, under this+    License to anyone who comes into possession of a copy.  This+    License will therefore apply, along with any applicable section 7+    additional terms, to the whole of the work, and all its parts,+    regardless of how they are packaged.  This License gives no+    permission to license the work in any other way, but it does not+    invalidate such permission if you have separately received it.++    d) If the work has interactive user interfaces, each must display+    Appropriate Legal Notices; however, if the Program has interactive+    interfaces that do not display Appropriate Legal Notices, your+    work need not make them do so.++  A compilation of a covered work with other separate and independent+works, which are not by their nature extensions of the covered work,+and which are not combined with it such as to form a larger program,+in or on a volume of a storage or distribution medium, is called an+"aggregate" if the compilation and its resulting copyright are not+used to limit the access or legal rights of the compilation's users+beyond what the individual works permit.  Inclusion of a covered work+in an aggregate does not cause this License to apply to the other+parts of the aggregate.++  6. Conveying Non-Source Forms.++  You may convey a covered work in object code form under the terms+of sections 4 and 5, provided that you also convey the+machine-readable Corresponding Source under the terms of this License,+in one of these ways:++    a) Convey the object code in, or embodied in, a physical product+    (including a physical distribution medium), accompanied by the+    Corresponding Source fixed on a durable physical medium+    customarily used for software interchange.++    b) Convey the object code in, or embodied in, a physical product+    (including a physical distribution medium), accompanied by a+    written offer, valid for at least three years and valid for as+    long as you offer spare parts or customer support for that product+    model, to give anyone who possesses the object code either (1) a+    copy of the Corresponding Source for all the software in the+    product that is covered by this License, on a durable physical+    medium customarily used for software interchange, for a price no+    more than your reasonable cost of physically performing this+    conveying of source, or (2) access to copy the+    Corresponding Source from a network server at no charge.++    c) Convey individual copies of the object code with a copy of the+    written offer to provide the Corresponding Source.  This+    alternative is allowed only occasionally and noncommercially, and+    only if you received the object code with such an offer, in accord+    with subsection 6b.++    d) Convey the object code by offering access from a designated+    place (gratis or for a charge), and offer equivalent access to the+    Corresponding Source in the same way through the same place at no+    further charge.  You need not require recipients to copy the+    Corresponding Source along with the object code.  If the place to+    copy the object code is a network server, the Corresponding Source+    may be on a different server (operated by you or a third party)+    that supports equivalent copying facilities, provided you maintain+    clear directions next to the object code saying where to find the+    Corresponding Source.  Regardless of what server hosts the+    Corresponding Source, you remain obligated to ensure that it is+    available for as long as needed to satisfy these requirements.++    e) Convey the object code using peer-to-peer transmission, provided+    you inform other peers where the object code and Corresponding+    Source of the work are being offered to the general public at no+    charge under subsection 6d.++  A separable portion of the object code, whose source code is excluded+from the Corresponding Source as a System Library, need not be+included in conveying the object code work.++  A "User Product" is either (1) a "consumer product", which means any+tangible personal property which is normally used for personal, family,+or household purposes, or (2) anything designed or sold for incorporation+into a dwelling.  In determining whether a product is a consumer product,+doubtful cases shall be resolved in favor of coverage.  For a particular+product received by a particular user, "normally used" refers to a+typical or common use of that class of product, regardless of the status+of the particular user or of the way in which the particular user+actually uses, or expects or is expected to use, the product.  A product+is a consumer product regardless of whether the product has substantial+commercial, industrial or non-consumer uses, unless such uses represent+the only significant mode of use of the product.++  "Installation Information" for a User Product means any methods,+procedures, authorization keys, or other information required to install+and execute modified versions of a covered work in that User Product from+a modified version of its Corresponding Source.  The information must+suffice to ensure that the continued functioning of the modified object+code is in no case prevented or interfered with solely because+modification has been made.++  If you convey an object code work under this section in, or with, or+specifically for use in, a User Product, and the conveying occurs as+part of a transaction in which the right of possession and use of the+User Product is transferred to the recipient in perpetuity or for a+fixed term (regardless of how the transaction is characterized), the+Corresponding Source conveyed under this section must be accompanied+by the Installation Information.  But this requirement does not apply+if neither you nor any third party retains the ability to install+modified object code on the User Product (for example, the work has+been installed in ROM).++  The requirement to provide Installation Information does not include a+requirement to continue to provide support service, warranty, or updates+for a work that has been modified or installed by the recipient, or for+the User Product in which it has been modified or installed.  Access to a+network may be denied when the modification itself materially and+adversely affects the operation of the network or violates the rules and+protocols for communication across the network.++  Corresponding Source conveyed, and Installation Information provided,+in accord with this section must be in a format that is publicly+documented (and with an implementation available to the public in+source code form), and must require no special password or key for+unpacking, reading or copying.++  7. Additional Terms.++  "Additional permissions" are terms that supplement the terms of this+License by making exceptions from one or more of its conditions.+Additional permissions that are applicable to the entire Program shall+be treated as though they were included in this License, to the extent+that they are valid under applicable law.  If additional permissions+apply only to part of the Program, that part may be used separately+under those permissions, but the entire Program remains governed by+this License without regard to the additional permissions.++  When you convey a copy of a covered work, you may at your option+remove any additional permissions from that copy, or from any part of+it.  (Additional permissions may be written to require their own+removal in certain cases when you modify the work.)  You may place+additional permissions on material, added by you to a covered work,+for which you have or can give appropriate copyright permission.++  Notwithstanding any other provision of this License, for material you+add to a covered work, you may (if authorized by the copyright holders of+that material) supplement the terms of this License with terms:++    a) Disclaiming warranty or limiting liability differently from the+    terms of sections 15 and 16 of this License; or++    b) Requiring preservation of specified reasonable legal notices or+    author attributions in that material or in the Appropriate Legal+    Notices displayed by works containing it; or++    c) Prohibiting misrepresentation of the origin of that material, or+    requiring that modified versions of such material be marked in+    reasonable ways as different from the original version; or++    d) Limiting the use for publicity purposes of names of licensors or+    authors of the material; or++    e) Declining to grant rights under trademark law for use of some+    trade names, trademarks, or service marks; or++    f) Requiring indemnification of licensors and authors of that+    material by anyone who conveys the material (or modified versions of+    it) with contractual assumptions of liability to the recipient, for+    any liability that these contractual assumptions directly impose on+    those licensors and authors.++  All other non-permissive additional terms are considered "further+restrictions" within the meaning of section 10.  If the Program as you+received it, or any part of it, contains a notice stating that it is+governed by this License along with a term that is a further+restriction, you may remove that term.  If a license document contains+a further restriction but permits relicensing or conveying under this+License, you may add to a covered work material governed by the terms+of that license document, provided that the further restriction does+not survive such relicensing or conveying.++  If you add terms to a covered work in accord with this section, you+must place, in the relevant source files, a statement of the+additional terms that apply to those files, or a notice indicating+where to find the applicable terms.++  Additional terms, permissive or non-permissive, may be stated in the+form of a separately written license, or stated as exceptions;+the above requirements apply either way.++  8. Termination.++  You may not propagate or modify a covered work except as expressly+provided under this License.  Any attempt otherwise to propagate or+modify it is void, and will automatically terminate your rights under+this License (including any patent licenses granted under the third+paragraph of section 11).++  However, if you cease all violation of this License, then your+license from a particular copyright holder is reinstated (a)+provisionally, unless and until the copyright holder explicitly and+finally terminates your license, and (b) permanently, if the copyright+holder fails to notify you of the violation by some reasonable means+prior to 60 days after the cessation.++  Moreover, your license from a particular copyright holder is+reinstated permanently if the copyright holder notifies you of the+violation by some reasonable means, this is the first time you have+received notice of violation of this License (for any work) from that+copyright holder, and you cure the violation prior to 30 days after+your receipt of the notice.++  Termination of your rights under this section does not terminate the+licenses of parties who have received copies or rights from you under+this License.  If your rights have been terminated and not permanently+reinstated, you do not qualify to receive new licenses for the same+material under section 10.++  9. Acceptance Not Required for Having Copies.++  You are not required to accept this License in order to receive or+run a copy of the Program.  Ancillary propagation of a covered work+occurring solely as a consequence of using peer-to-peer transmission+to receive a copy likewise does not require acceptance.  However,+nothing other than this License grants you permission to propagate or+modify any covered work.  These actions infringe copyright if you do+not accept this License.  Therefore, by modifying or propagating a+covered work, you indicate your acceptance of this License to do so.++  10. Automatic Licensing of Downstream Recipients.++  Each time you convey a covered work, the recipient automatically+receives a license from the original licensors, to run, modify and+propagate that work, subject to this License.  You are not responsible+for enforcing compliance by third parties with this License.++  An "entity transaction" is a transaction transferring control of an+organization, or substantially all assets of one, or subdividing an+organization, or merging organizations.  If propagation of a covered+work results from an entity transaction, each party to that+transaction who receives a copy of the work also receives whatever+licenses to the work the party's predecessor in interest had or could+give under the previous paragraph, plus a right to possession of the+Corresponding Source of the work from the predecessor in interest, if+the predecessor has it or can get it with reasonable efforts.++  You may not impose any further restrictions on the exercise of the+rights granted or affirmed under this License.  For example, you may+not impose a license fee, royalty, or other charge for exercise of+rights granted under this License, and you may not initiate litigation+(including a cross-claim or counterclaim in a lawsuit) alleging that+any patent claim is infringed by making, using, selling, offering for+sale, or importing the Program or any portion of it.++  11. Patents.++  A "contributor" is a copyright holder who authorizes use under this+License of the Program or a work on which the Program is based.  The+work thus licensed is called the contributor's "contributor version".++  A contributor's "essential patent claims" are all patent claims+owned or controlled by the contributor, whether already acquired or+hereafter acquired, that would be infringed by some manner, permitted+by this License, of making, using, or selling its contributor version,+but do not include claims that would be infringed only as a+consequence of further modification of the contributor version.  For+purposes of this definition, "control" includes the right to grant+patent sublicenses in a manner consistent with the requirements of+this License.++  Each contributor grants you a non-exclusive, worldwide, royalty-free+patent license under the contributor's essential patent claims, to+make, use, sell, offer for sale, import and otherwise run, modify and+propagate the contents of its contributor version.++  In the following three paragraphs, a "patent license" is any express+agreement or commitment, however denominated, not to enforce a patent+(such as an express permission to practice a patent or covenant not to+sue for patent infringement).  To "grant" such a patent license to a+party means to make such an agreement or commitment not to enforce a+patent against the party.++  If you convey a covered work, knowingly relying on a patent license,+and the Corresponding Source of the work is not available for anyone+to copy, free of charge and under the terms of this License, through a+publicly available network server or other readily accessible means,+then you must either (1) cause the Corresponding Source to be so+available, or (2) arrange to deprive yourself of the benefit of the+patent license for this particular work, or (3) arrange, in a manner+consistent with the requirements of this License, to extend the patent+license to downstream recipients.  "Knowingly relying" means you have+actual knowledge that, but for the patent license, your conveying the+covered work in a country, or your recipient's use of the covered work+in a country, would infringe one or more identifiable patents in that+country that you have reason to believe are valid.++  If, pursuant to or in connection with a single transaction or+arrangement, you convey, or propagate by procuring conveyance of, a+covered work, and grant a patent license to some of the parties+receiving the covered work authorizing them to use, propagate, modify+or convey a specific copy of the covered work, then the patent license+you grant is automatically extended to all recipients of the covered+work and works based on it.++  A patent license is "discriminatory" if it does not include within+the scope of its coverage, prohibits the exercise of, or is+conditioned on the non-exercise of one or more of the rights that are+specifically granted under this License.  You may not convey a covered+work if you are a party to an arrangement with a third party that is+in the business of distributing software, under which you make payment+to the third party based on the extent of your activity of conveying+the work, and under which the third party grants, to any of the+parties who would receive the covered work from you, a discriminatory+patent license (a) in connection with copies of the covered work+conveyed by you (or copies made from those copies), or (b) primarily+for and in connection with specific products or compilations that+contain the covered work, unless you entered into that arrangement,+or that patent license was granted, prior to 28 March 2007.++  Nothing in this License shall be construed as excluding or limiting+any implied license or other defenses to infringement that may+otherwise be available to you under applicable patent law.++  12. No Surrender of Others' Freedom.++  If conditions are imposed on you (whether by court order, agreement or+otherwise) that contradict the conditions of this License, they do not+excuse you from the conditions of this License.  If you cannot convey a+covered work so as to satisfy simultaneously your obligations under this+License and any other pertinent obligations, then as a consequence you may+not convey it at all.  For example, if you agree to terms that obligate you+to collect a royalty for further conveying from those to whom you convey+the Program, the only way you could satisfy both those terms and this+License would be to refrain entirely from conveying the Program.++  13. Use with the GNU Affero General Public License.++  Notwithstanding any other provision of this License, you have+permission to link or combine any covered work with a work licensed+under version 3 of the GNU Affero General Public License into a single+combined work, and to convey the resulting work.  The terms of this+License will continue to apply to the part which is the covered work,+but the special requirements of the GNU Affero General Public License,+section 13, concerning interaction through a network will apply to the+combination as such.++  14. Revised Versions of this License.++  The Free Software Foundation may publish revised and/or new versions of+the GNU General Public License from time to time.  Such new versions will+be similar in spirit to the present version, but may differ in detail to+address new problems or concerns.++  Each version is given a distinguishing version number.  If the+Program specifies that a certain numbered version of the GNU General+Public License "or any later version" applies to it, you have the+option of following the terms and conditions either of that numbered+version or of any later version published by the Free Software+Foundation.  If the Program does not specify a version number of the+GNU General Public License, you may choose any version ever published+by the Free Software Foundation.++  If the Program specifies that a proxy can decide which future+versions of the GNU General Public License can be used, that proxy's+public statement of acceptance of a version permanently authorizes you+to choose that version for the Program.++  Later license versions may give you additional or different+permissions.  However, no additional obligations are imposed on any+author or copyright holder as a result of your choosing to follow a+later version.++  15. Disclaimer of Warranty.++  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.++  16. Limitation of Liability.++  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF+SUCH DAMAGES.++  17. Interpretation of Sections 15 and 16.++  If the disclaimer of warranty and limitation of liability provided+above cannot be given local legal effect according to their terms,+reviewing courts shall apply local law that most closely approximates+an absolute waiver of all civil liability in connection with the+Program, unless a warranty or assumption of liability accompanies a+copy of the Program in return for a fee.++                     END OF TERMS AND CONDITIONS++            How to Apply These Terms to Your New Programs++  If you develop a new program, and you want it to be of the greatest+possible use to the public, the best way to achieve this is to make it+free software which everyone can redistribute and change under these terms.++  To do so, attach the following notices to the program.  It is safest+to attach them to the start of each source file to most effectively+state the exclusion of warranty; and each file should have at least+the "copyright" line and a pointer to where the full notice is found.++    <one line to give the program's name and a brief idea of what it does.>+    Copyright (C) <year>  <name of author>++    This program is free software: you can redistribute it and/or modify+    it under the terms of the GNU General Public License as published by+    the Free Software Foundation, either version 3 of the License, or+    (at your option) any later version.++    This program is distributed in the hope that it will be useful,+    but WITHOUT ANY WARRANTY; without even the implied warranty of+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the+    GNU General Public License for more details.++    You should have received a copy of the GNU General Public License+    along with this program.  If not, see <http://www.gnu.org/licenses/>.++Also add information on how to contact you by electronic and paper mail.++  If the program does terminal interaction, make it output a short+notice like this when it starts in an interactive mode:++    <program>  Copyright (C) <year>  <name of author>+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.+    This is free software, and you are welcome to redistribute it+    under certain conditions; type `show c' for details.++The hypothetical commands `show w' and `show c' should show the appropriate+parts of the General Public License.  Of course, your program's commands+might be different; for a GUI interface, you would use an "about box".++  You should also get your employer (if you work as a programmer) or school,+if any, to sign a "copyright disclaimer" for the program, if necessary.+For more information on this, and how to apply and follow the GNU GPL, see+<http://www.gnu.org/licenses/>.++  The GNU General Public License does not permit incorporating your program+into proprietary programs.  If your program is a subroutine library, you+may consider it more useful to permit linking proprietary applications with+the library.  If this is what you want to do, use the GNU Lesser General+Public License instead of this License.  But first, please read+<http://www.gnu.org/philosophy/why-not-lgpl.html>.