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‎.gitignore

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*.o
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*.bundle
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*.so
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ext/salsa20/Makefile
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doc
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pkg
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*.class
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tmp/

‎CHANGELOG

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0.1.0 Aug 04 2010
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- Initial release

‎LICENSE

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Copyright (C) 2011-2011 Dov Murik. All rights reserved.
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Original C implementation of the Salsa20 algorithm by Daniel Bernstein.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

‎README.rdoc

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= salsa20
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Ruby-wrapper for the {Salsa20 stream cipher
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algorithm}[http://cr.yp.to/snuffle.html] designed by Daniel Bernstein. Salsa20
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is a family of 256-bit stream ciphers designed in 2005 and submitted to
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eSTREAM, the ECRYPT Stream Cipher Project.
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== How to install
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gem install salsa20
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You'll need a working compiler -- the crypto code is the {original C
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implementation}[http://cr.yp.to/snuffle.html] from Daniel Bernstein.
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== Usage
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require 'salsa20'
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key = "VERY_SECRET_256_BIT_KEY_12345678"
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iv = "-RANDOM-"
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plain_text = "Salsa20 is a family of 256-bit stream ciphers"
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encryptor = Salsa20.new(key, iv)
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encrypted_text = encryptor.encrypt(plain_text)
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p encrypted_text
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# => "\x9D\x1C\xE4\x83\xAB\x8E\xB7\x85a,\xC3\xF6\x981*\x03\b-\x99\xAD\xDF\xBFS\x96\x94$\xA0\xF0U\v\xABz;=R\xBB\xE1\xB0\xDD\xBC\x1A9\xB8\xBEb"
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decryptor = Salsa20.new(key, iv)
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decrypted_text = decryptor.decrypt(encrypted_text)
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p decrypted_text
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# => "Salsa20 is a family of 256-bit stream ciphers"
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The Salsa20 cipher algorhitm supports efficiently seeking to any 64-bytes
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boundry position in the stream using the +seek+ method. Use +position+ to tell
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the current stream position in bytes.
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For more information, see the detailed rdoc of the Salsa20 class.
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== References
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* http://cr.yp.to/snuffle.html
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* http://www.ecrypt.eu.org/stream/salsa20pf.html
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* http://en.wikipedia.org/wiki/Salsa20
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== License
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BSD 2-Clause open source license (full license text in the +LICENSE+ file).
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== Contact
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Author :: Dov Murik ([email protected])
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Project homepage :: https://github.com/dubek/salsa20-ruby

‎Rakefile

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gem 'rdoc'
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require 'rdoc/task'
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require 'rake/extensiontask'
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require 'rake/testtask'
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GEMSPEC = eval(File.read(File.expand_path("../salsa20.gemspec", __FILE__)))
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Rake::ExtensionTask.new('salsa20_ext')
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Rake::TestTask.new do |t|
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t.libs << "test"
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t.test_files = FileList['test/*test.rb']
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t.verbose = true
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end
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RDoc::Task.new do |rdoc|
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rdoc.rdoc_dir = 'doc/rdoc'
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rdoc.options += GEMSPEC.rdoc_options
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rdoc.template = ENV['TEMPLATE'] if ENV['TEMPLATE']
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rdoc.rdoc_files.include(*GEMSPEC.extra_rdoc_files)
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end

‎ext/salsa20_ext/ecrypt-config.h

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/* ecrypt-config.h */
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/* *** Normally, it should not be necessary to edit this file. *** */
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#ifndef ECRYPT_CONFIG
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#define ECRYPT_CONFIG
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/* ------------------------------------------------------------------------- */
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/* Guess the endianness of the target architecture. */
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/*
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* The LITTLE endian machines:
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*/
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#if defined(__ultrix) /* Older MIPS */
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#define ECRYPT_LITTLE_ENDIAN
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#elif defined(__alpha) /* Alpha */
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#define ECRYPT_LITTLE_ENDIAN
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#elif defined(i386) /* x86 (gcc) */
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#define ECRYPT_LITTLE_ENDIAN
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#elif defined(__i386) /* x86 (gcc) */
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#define ECRYPT_LITTLE_ENDIAN
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#elif defined(_M_IX86) /* x86 (MSC, Borland) */
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#define ECRYPT_LITTLE_ENDIAN
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#elif defined(_MSC_VER) /* x86 (surely MSC) */
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#define ECRYPT_LITTLE_ENDIAN
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#elif defined(__INTEL_COMPILER) /* x86 (surely Intel compiler icl.exe) */
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#define ECRYPT_LITTLE_ENDIAN
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/*
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* The BIG endian machines:
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*/
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#elif defined(sun) /* Newer Sparc's */
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#define ECRYPT_BIG_ENDIAN
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#elif defined(__ppc__) /* PowerPC */
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#define ECRYPT_BIG_ENDIAN
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/*
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* Finally machines with UNKNOWN endianness:
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*/
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#elif defined (_AIX) /* RS6000 */
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#define ECRYPT_UNKNOWN
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#elif defined(__hpux) /* HP-PA */
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#define ECRYPT_UNKNOWN
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#elif defined(__aux) /* 68K */
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#define ECRYPT_UNKNOWN
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#elif defined(__dgux) /* 88K (but P6 in latest boxes) */
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#define ECRYPT_UNKNOWN
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#elif defined(__sgi) /* Newer MIPS */
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#define ECRYPT_UNKNOWN
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#else /* Any other processor */
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#define ECRYPT_UNKNOWN
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#endif
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/* ------------------------------------------------------------------------- */
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/*
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* Find minimal-width types to store 8-bit, 16-bit, 32-bit, and 64-bit
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* integers.
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*
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* Note: to enable 64-bit types on 32-bit compilers, it might be
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* necessary to switch from ISO C90 mode to ISO C99 mode (e.g., gcc
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* -std=c99).
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*/
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#include <limits.h>
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/* --- check char --- */
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#if (UCHAR_MAX / 0xFU > 0xFU)
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#ifndef I8T
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#define I8T char
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#define U8C(v) (v##U)
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#if (UCHAR_MAX == 0xFFU)
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#define ECRYPT_I8T_IS_BYTE
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#endif
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#endif
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#if (UCHAR_MAX / 0xFFU > 0xFFU)
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#ifndef I16T
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#define I16T char
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#define U16C(v) (v##U)
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#endif
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#if (UCHAR_MAX / 0xFFFFU > 0xFFFFU)
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#ifndef I32T
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#define I32T char
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#define U32C(v) (v##U)
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#endif
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#if (UCHAR_MAX / 0xFFFFFFFFU > 0xFFFFFFFFU)
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#ifndef I64T
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#define I64T char
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#define U64C(v) (v##U)
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#define ECRYPT_NATIVE64
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#endif
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#endif
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#endif
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#endif
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#endif
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/* --- check short --- */
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#if (USHRT_MAX / 0xFU > 0xFU)
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#ifndef I8T
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#define I8T short
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#define U8C(v) (v##U)
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#if (USHRT_MAX == 0xFFU)
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#define ECRYPT_I8T_IS_BYTE
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#endif
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#endif
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#if (USHRT_MAX / 0xFFU > 0xFFU)
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#ifndef I16T
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#define I16T short
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#define U16C(v) (v##U)
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#endif
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#if (USHRT_MAX / 0xFFFFU > 0xFFFFU)
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#ifndef I32T
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#define I32T short
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#define U32C(v) (v##U)
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#endif
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#if (USHRT_MAX / 0xFFFFFFFFU > 0xFFFFFFFFU)
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#ifndef I64T
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#define I64T short
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#define U64C(v) (v##U)
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#define ECRYPT_NATIVE64
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#endif
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#endif
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#endif
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#endif
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#endif
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/* --- check int --- */
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#if (UINT_MAX / 0xFU > 0xFU)
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#ifndef I8T
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#define I8T int
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#define U8C(v) (v##U)
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#if (ULONG_MAX == 0xFFU)
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#define ECRYPT_I8T_IS_BYTE
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#endif
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#endif
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#if (UINT_MAX / 0xFFU > 0xFFU)
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#ifndef I16T
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#define I16T int
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#define U16C(v) (v##U)
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#endif
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#if (UINT_MAX / 0xFFFFU > 0xFFFFU)
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#ifndef I32T
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#define I32T int
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#define U32C(v) (v##U)
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#endif
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#if (UINT_MAX / 0xFFFFFFFFU > 0xFFFFFFFFU)
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#ifndef I64T
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#define I64T int
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#define U64C(v) (v##U)
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#define ECRYPT_NATIVE64
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#endif
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#endif
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#endif
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#endif
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#endif
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/* --- check long --- */
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#if (ULONG_MAX / 0xFUL > 0xFUL)
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#ifndef I8T
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#define I8T long
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#define U8C(v) (v##UL)
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#if (ULONG_MAX == 0xFFUL)
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#define ECRYPT_I8T_IS_BYTE
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#endif
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#endif
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#if (ULONG_MAX / 0xFFUL > 0xFFUL)
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#ifndef I16T
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#define I16T long
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#define U16C(v) (v##UL)
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#endif
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#if (ULONG_MAX / 0xFFFFUL > 0xFFFFUL)
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#ifndef I32T
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#define I32T long
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#define U32C(v) (v##UL)
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#endif
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#if (ULONG_MAX / 0xFFFFFFFFUL > 0xFFFFFFFFUL)
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#ifndef I64T
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#define I64T long
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#define U64C(v) (v##UL)
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#define ECRYPT_NATIVE64
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#endif
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#endif
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#endif
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#endif
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#endif
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/* --- check long long --- */
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#ifdef ULLONG_MAX
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#if (ULLONG_MAX / 0xFULL > 0xFULL)
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#ifndef I8T
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#define I8T long long
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#define U8C(v) (v##ULL)
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#if (ULLONG_MAX == 0xFFULL)
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#define ECRYPT_I8T_IS_BYTE
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#endif
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#endif
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#if (ULLONG_MAX / 0xFFULL > 0xFFULL)
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#ifndef I16T
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#define I16T long long
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#define U16C(v) (v##ULL)
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#endif
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#if (ULLONG_MAX / 0xFFFFULL > 0xFFFFULL)
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#ifndef I32T
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#define I32T long long
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#define U32C(v) (v##ULL)
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#endif
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#if (ULLONG_MAX / 0xFFFFFFFFULL > 0xFFFFFFFFULL)
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#ifndef I64T
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#define I64T long long
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#define U64C(v) (v##ULL)
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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/* --- check __int64 --- */
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#ifdef _UI64_MAX
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#if (_UI64_MAX / 0xFFFFFFFFui64 > 0xFFFFFFFFui64)
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#ifndef I64T
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#define I64T __int64
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#define U64C(v) (v##ui64)
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#endif
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#endif
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#endif
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/* ------------------------------------------------------------------------- */
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#endif

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