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add boost/uuid/sha1.hpp to our libs

This makes sure sha1.hpp (used by websocket implementation) is also available on systems with a libboost-dev from earlier than version 1.42 (e.g. Ubuntu Lucid).
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commit 8ca8fdacbd7837f52b3980e1a297b77b5636cc80 1 parent d4c1261
@Montellese Montellese authored
Showing with 208 additions and 0 deletions.
  1. +208 −0 lib/boost/uuid/sha1.hpp
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208 lib/boost/uuid/sha1.hpp
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+// boost/uuid/sha1.hpp header file ----------------------------------------------//
+
+// Copyright 2007 Andy Tompkins.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Revision History
+// 29 May 2007 - Initial Revision
+// 25 Feb 2008 - moved to namespace boost::uuids::detail
+
+// This is a byte oriented implementation
+// Note: this implementation does not handle message longer than
+// 2^32 bytes.
+
+#ifndef BOOST_UUID_SHA1_H
+#define BOOST_UUID_SHA1_H
+
+#include <boost/static_assert.hpp>
+#include <cstddef>
+
+#ifdef BOOST_NO_STDC_NAMESPACE
+namespace std {
+ using ::size_t;
+} // namespace std
+#endif
+
+namespace boost {
+namespace uuids {
+namespace detail {
+
+BOOST_STATIC_ASSERT(sizeof(unsigned char)*8 == 8);
+BOOST_STATIC_ASSERT(sizeof(unsigned int)*8 == 32);
+
+inline unsigned int left_rotate(unsigned int x, std::size_t n)
+{
+ return (x<<n) ^ (x>> (32-n));
+}
+
+class sha1
+{
+public:
+ typedef unsigned int(&digest_type)[5];
+public:
+ sha1();
+
+ void reset();
+
+ void process_byte(unsigned char byte);
+ void process_block(void const* bytes_begin, void const* bytes_end);
+ void process_bytes(void const* buffer, std::size_t byte_count);
+
+ void get_digest(digest_type digest);
+
+private:
+ void process_block();
+
+private:
+ unsigned int h_[5];
+
+ unsigned char block_[64];
+
+ std::size_t block_byte_index_;
+ std::size_t byte_count_;
+};
+
+inline sha1::sha1()
+{
+ reset();
+}
+
+inline void sha1::reset()
+{
+ h_[0] = 0x67452301;
+ h_[1] = 0xEFCDAB89;
+ h_[2] = 0x98BADCFE;
+ h_[3] = 0x10325476;
+ h_[4] = 0xC3D2E1F0;
+
+ block_byte_index_ = 0;
+ byte_count_ = 0;
+}
+
+inline void sha1::process_byte(unsigned char byte)
+{
+ block_[block_byte_index_++] = byte;
+ ++byte_count_;
+ if (block_byte_index_ == 64) {
+ block_byte_index_ = 0;
+ process_block();
+ }
+}
+
+inline void sha1::process_block(void const* bytes_begin, void const* bytes_end)
+{
+ unsigned char const* begin = static_cast<unsigned char const*>(bytes_begin);
+ unsigned char const* end = static_cast<unsigned char const*>(bytes_end);
+ for(; begin != end; ++begin) {
+ process_byte(*begin);
+ }
+}
+
+inline void sha1::process_bytes(void const* buffer, std::size_t byte_count)
+{
+ unsigned char const* b = static_cast<unsigned char const*>(buffer);
+ process_block(b, b+byte_count);
+}
+
+inline void sha1::process_block()
+{
+ unsigned int w[80];
+ for (std::size_t i=0; i<16; ++i) {
+ w[i] = (block_[i*4 + 0] << 24);
+ w[i] |= (block_[i*4 + 1] << 16);
+ w[i] |= (block_[i*4 + 2] << 8);
+ w[i] |= (block_[i*4 + 3]);
+ }
+ for (std::size_t i=16; i<80; ++i) {
+ w[i] = left_rotate((w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16]), 1);
+ }
+
+ unsigned int a = h_[0];
+ unsigned int b = h_[1];
+ unsigned int c = h_[2];
+ unsigned int d = h_[3];
+ unsigned int e = h_[4];
+
+ for (std::size_t i=0; i<80; ++i) {
+ unsigned int f;
+ unsigned int k;
+
+ if (i<20) {
+ f = (b & c) | (~b & d);
+ k = 0x5A827999;
+ } else if (i<40) {
+ f = b ^ c ^ d;
+ k = 0x6ED9EBA1;
+ } else if (i<60) {
+ f = (b & c) | (b & d) | (c & d);
+ k = 0x8F1BBCDC;
+ } else {
+ f = b ^ c ^ d;
+ k = 0xCA62C1D6;
+ }
+
+ unsigned temp = left_rotate(a, 5) + f + e + k + w[i];
+ e = d;
+ d = c;
+ c = left_rotate(b, 30);
+ b = a;
+ a = temp;
+ }
+
+ h_[0] += a;
+ h_[1] += b;
+ h_[2] += c;
+ h_[3] += d;
+ h_[4] += e;
+}
+
+inline void sha1::get_digest(digest_type digest)
+{
+ std::size_t bit_count = byte_count_*8;
+
+ // append the bit '1' to the message
+ process_byte(0x80);
+
+ // append k bits '0', where k is the minimum number >= 0
+ // such that the resulting message length is congruent to 56 (mod 64)
+ // check if there is enough space for padding and bit_count
+ if (block_byte_index_ > 56) {
+ // finish this block
+ while (block_byte_index_ != 0) {
+ process_byte(0);
+ }
+
+ // one more block
+ while (block_byte_index_ < 56) {
+ process_byte(0);
+ }
+ } else {
+ while (block_byte_index_ < 56) {
+ process_byte(0);
+ }
+ }
+
+ // append length of message (before pre-processing)
+ // as a 64-bit big-endian integer
+ process_byte(0);
+ process_byte(0);
+ process_byte(0);
+ process_byte(0);
+ process_byte( static_cast<unsigned char>((bit_count>>24) & 0xFF));
+ process_byte( static_cast<unsigned char>((bit_count>>16) & 0xFF));
+ process_byte( static_cast<unsigned char>((bit_count>>8 ) & 0xFF));
+ process_byte( static_cast<unsigned char>((bit_count) & 0xFF));
+
+ // get final digest
+ digest[0] = h_[0];
+ digest[1] = h_[1];
+ digest[2] = h_[2];
+ digest[3] = h_[3];
+ digest[4] = h_[4];
+}
+
+}}} // namespace boost::uuids::detail
+
+#endif
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