diff --git a/BSD3 b/BSD3 new file mode 100644 --- /dev/null +++ b/BSD3 @@ -0,0 +1,26 @@ +Copyright (c) Ian Lynagh. +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions +are met: +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. +2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. +3. The names of the author may not be used to endorse or promote + products derived from this software without specific prior written + permission. + +THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +SUCH DAMAGE. diff --git a/COPYING b/COPYING new file mode 100644 --- /dev/null +++ b/COPYING @@ -0,0 +1,6 @@ + +Copyright (c) Ian Lynagh, 2005, 2007. + +This package can be used under either the GPL v2, as in ./GPL-2, or the +3-clause BSD, as in ./BSD3, license. + diff --git a/Codec/Binary/Base64/String.hs b/Codec/Binary/Base64/String.hs new file mode 100644 --- /dev/null +++ b/Codec/Binary/Base64/String.hs @@ -0,0 +1,97 @@ + +-- Copyright (c) Ian Lynagh, 2005, 2007. + +module Codec.Binary.Base64.String (encode, decode) where + +import Data.Bits (shiftL, shiftR, (.&.), (.|.)) +import Data.Char (ord, chr, isAscii, isAlphaNum, isUpper, isLower, isDigit) +import Data.List (intersperse) + +chars_per_line :: Int +chars_per_line = 64 +-- PEM mandates 64. MIME allows anything up to 76. + +encode :: String -> String +encode = concat . intersperse "\n" . splits chars_per_line . enc + +-- It is up to the caller to make sure the right sort of line breaks are +-- in the input +enc :: String -> String +enc (c1:c2:c3:cs) = toChar (o1 `shiftR` 2) -- First 6 bits of c1 + : toChar (((o1 `shiftL` 4) .&. 0x30) -- Last 2 bits of c1 + .|. (o2 `shiftR` 4)) -- First 4 bits of c2 + : toChar (((o2 `shiftL` 2) .&. 0x3C) -- Last 4 bits of c2 + .|. (o3 `shiftR` 6)) -- First 2 bits of c3 + : toChar (o3 .&. 0x3F) -- Last 6 bits of c3 + : enc cs + where o1 = ord c1 + o2 = ord c2 + o3 = ord c3 +enc [c1, c2] = toChar (o1 `shiftR` 2) -- First 6 bits of c1 + : toChar (((o1 `shiftL` 4) .&. 0x30) -- Last 2 bits of c1 + .|. (o2 `shiftR` 4)) -- First 4 bits of c2 + : toChar ((o2 `shiftL` 2) .&. 0x3C) -- Last 4 bits of c2 + : "=" + where o1 = ord c1 + o2 = ord c2 +enc [c1] = toChar (o1 `shiftR` 2) -- First 6 bits of c1 + : toChar ((o1 `shiftL` 4) .&. 0x30) -- Last 2 bits of c1 + : "==" + where o1 = ord c1 +enc "" = "" + +toChar :: Int -> Char +toChar n | n <= 25 = chr (ord 'A' + n) + | n <= 51 = chr (ord 'a' + n - 26) + | n <= 61 = chr (ord '0' + n - 52) + | n == 62 = '+' + | n == 63 = '/' + | otherwise + = error ("toChar: Can't happen: Bad input: " ++ show n) + +decode :: String -> String +decode = dec . filter valid + where valid c = isAscii c + && (isAlphaNum c || c == '+' || c == '/' || c == '=') + +dec :: String -> String +dec "" = "" +dec ('=':_) = "" -- This can't be valid, so give up +dec (_:'=':_) = "" -- This can't be valid, so give up +dec (c1:c2:'=':_) -- Should have [c1,c2,'=','='], but if not we'd decode + -- this bit and stop anyway + = take 1 $ dec [c1, c2, 'A', 'A'] +dec (c1:c2:c3:'=':_) -- Should have [c1,c2,c3,'='], but if not we'd decode + -- this bit and stop anyway + = take 2 $ dec [c1, c2, c3, 'A'] +dec (c1:c2:c3:c4:cs) + = let x1 = fromChar c1 + x2 = fromChar c2 + x3 = fromChar c3 + x4 = fromChar c4 + in -- 6 bits from x1, 2 bits from x2 + chr ((x1 `shiftL` 2) .|. (x2 `shiftR` 4)) + -- 4 bits from x2, 4 bits from x3 + : chr (((x2 `shiftL` 4) .&. 0xF0) .|. (x3 `shiftR` 2)) + -- 2 bits from x3, 6 bits from x4 + : chr (((x3 `shiftL` 6) .&. 0xC0) .|. x4) + : dec cs +-- Drop more invalid things +dec [_] = "" +dec [_, _] = "" +dec [_, _, _] = "" + +fromChar :: Char -> Int +fromChar c + | isUpper c = ord c - ord 'A' + | isLower c = ord c - ord 'a' + 26 + | isDigit c = ord c - ord '0' + 52 + | c == '+' = 62 + | c == '/' = 63 + | otherwise = error ("fromChar: Can't happen: Bad input: " ++ show c) + +splits :: Int -> [a] -> [[a]] +splits _ [] = [] +splits n xs = case splitAt n xs of + (ys, zs) -> ys:splits n zs + diff --git a/GPL-2 b/GPL-2 new file mode 100644 --- /dev/null +++ b/GPL-2 @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) 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 +this service 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 make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. 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. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute 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 and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) You must cause the modified files to carry prominent notices + stating that you changed the files and the date of any change. + + b) You must cause any work that you distribute or publish, that in + whole or in part contains or is derived from the Program or any + part thereof, to be licensed as a whole at no charge to all third + parties under the terms of this License. + + c) If the modified program normally reads commands interactively + when run, you must cause it, when started running for such + interactive use in the most ordinary way, to print or display an + announcement including an appropriate copyright notice and a + notice that there is no warranty (or else, saying that you provide + a warranty) and that users may redistribute the program under + these conditions, and telling the user how to view a copy of this + License. (Exception: if the Program itself is interactive but + does not normally print such an announcement, your work based on + the Program is not required to print an announcement.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Program, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + + a) Accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of Sections + 1 and 2 above on a medium customarily used for software interchange; or, + + b) Accompany it with a written offer, valid for at least three + years, to give any third party, for a charge no more than your + cost of physically performing source distribution, a complete + machine-readable copy of the corresponding source code, to be + distributed under the terms of Sections 1 and 2 above on a medium + customarily used for software interchange; or, + + c) Accompany it with the information you received as to the offer + to distribute corresponding source code. (This alternative is + allowed only for noncommercial distribution and only if you + received the program in object code or executable form with such + an offer, in accord with Subsection b above.) + +The source code for a work means the preferred form of the work for +making modifications to it. For an executable work, complete source +code means all the source code for all modules it contains, plus any +associated interface definition files, plus the scripts used to +control compilation and installation of the executable. However, as a +special exception, the source code distributed need not include +anything that is normally distributed (in either source or binary +form) with the major components (compiler, kernel, and so on) of the +operating system on which the executable runs, unless that component +itself accompanies the executable. + +If distribution of executable or object code is made by offering +access to copy from a designated place, then offering equivalent +access to copy the source code from the same place counts as +distribution of the source code, even though third parties are not +compelled to copy the source along with the object code. + + 4. You may not copy, modify, sublicense, or distribute the Program +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense or distribute the Program is +void, and will automatically terminate your rights under this License. +However, parties who have received copies, or rights, from you under +this License will not have their licenses terminated so long as such +parties remain in full compliance. + + 5. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Program or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Program (or any work based on the +Program), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Program or works based on it. + + 6. Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +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 +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the 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 a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, 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. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE 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. + + 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 +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision 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, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This 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 Library General +Public License instead of this License. diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,8 @@ + +module Main (main) where + +import Distribution.Simple + +main :: IO () +main = defaultMain + diff --git a/Test.hs b/Test.hs new file mode 100644 --- /dev/null +++ b/Test.hs @@ -0,0 +1,37 @@ + +module Main (main) where + +import Codec.Binary.Base64.String + +import Control.Monad +import System.Exit +import Test.HUnit + +main :: IO () +main = do counts <- runTestTT tests + when ((errors counts, failures counts) /= (0, 0)) $ + exitWith (ExitFailure 1) + +testData :: [(String, String)] +testData = [("", "") + ,("\0", "AA==") + ,("\255", "/w==") + ,("E", "RQ==") + ,("Ex", "RXg=") + ,("Exa", "RXhh") + ,("Exam", "RXhhbQ==") + ,("Examp", "RXhhbXA=") + ,("Exampl", "RXhhbXBs") + ,("Example", "RXhhbXBsZQ==") + ,("Ex\0am\255ple", "RXgAYW3/cGxl") + ] + +tests :: Test +tests = TestList $ concat + [ [ TestLabel ("encode " ++ show plain) (encoded_plain ~?= encoded), + TestLabel ("decode " ++ show plain) (decoded_encoded ~?= plain) ] + | (plain, encoded) <- testData, + let encoded_plain = encode plain + decoded_encoded = decode encoded + ] + diff --git a/base64-string.cabal b/base64-string.cabal new file mode 100644 --- /dev/null +++ b/base64-string.cabal @@ -0,0 +1,25 @@ +Name: base64-string +Version: 0.1 +License: OtherLicense +License-File: COPYING +Copyright: Ian Lynagh, 2005, 2007 +Author: Ian Lynagh +Maintainer: igloo@earth.li +Stability: experimental +Homepage: http://urchin.earth.li/~ian/cabal/base64-string/ +Synopsis: Base64 implementation for String's. +Description: + This Base64 implementation uses the characters + A-Z a-z 0-9 + / + along with + = + to signal the number of characters mod 3. + It is compliant with both PEM (RFC 989 / RFC 1421) and MIME (RFC 2045). +Category: Codec +Tested-With: GHC==6.6 +Build-Depends: base +Extra-source-files: "BSD3", "GPL-2", "Test.hs" +Exposed-modules: + Codec.Binary.Base64.String +GHC-Options: -O -Wall -Werror +