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f785676f2a
all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month
286 lines
9 KiB
C++
286 lines
9 KiB
C++
/*
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* This code is derived from (original license follows):
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*
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* This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
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* MD5 Message-Digest Algorithm (RFC 1321).
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*
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* Homepage:
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* http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
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*
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* Author:
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* Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
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*
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* This software was written by Alexander Peslyak in 2001. No copyright is
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* claimed, and the software is hereby placed in the public domain.
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* In case this attempt to disclaim copyright and place the software in the
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* public domain is deemed null and void, then the software is
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* Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
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* general public under the following terms:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted.
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*
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* There's ABSOLUTELY NO WARRANTY, express or implied.
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*
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* (This is a heavily cut-down "BSD license".)
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*
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* This differs from Colin Plumb's older public domain implementation in that
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* no exactly 32-bit integer data type is required (any 32-bit or wider
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* unsigned integer data type will do), there's no compile-time endianness
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* configuration, and the function prototypes match OpenSSL's. No code from
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* Colin Plumb's implementation has been reused; this comment merely compares
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* the properties of the two independent implementations.
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*
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* The primary goals of this implementation are portability and ease of use.
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* It is meant to be fast, but not as fast as possible. Some known
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* optimizations are not included to reduce source code size and avoid
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* compile-time configuration.
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*/
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/MD5.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstring>
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// The basic MD5 functions.
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// F and G are optimized compared to their RFC 1321 definitions for
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// architectures that lack an AND-NOT instruction, just like in Colin Plumb's
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// implementation.
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#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
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#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | ~(z)))
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// The MD5 transformation for all four rounds.
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#define STEP(f, a, b, c, d, x, t, s) \
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(a) += f((b), (c), (d)) + (x) + (t); \
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(a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
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(a) += (b);
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// SET reads 4 input bytes in little-endian byte order and stores them
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// in a properly aligned word in host byte order.
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#define SET(n) \
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(block[(n)] = \
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(MD5_u32plus) ptr[(n) * 4] | ((MD5_u32plus) ptr[(n) * 4 + 1] << 8) | \
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((MD5_u32plus) ptr[(n) * 4 + 2] << 16) | \
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((MD5_u32plus) ptr[(n) * 4 + 3] << 24))
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#define GET(n) (block[(n)])
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namespace llvm {
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/// \brief This processes one or more 64-byte data blocks, but does NOT update
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///the bit counters. There are no alignment requirements.
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const uint8_t *MD5::body(ArrayRef<uint8_t> Data) {
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const uint8_t *ptr;
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MD5_u32plus a, b, c, d;
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MD5_u32plus saved_a, saved_b, saved_c, saved_d;
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unsigned long Size = Data.size();
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ptr = Data.data();
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a = this->a;
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b = this->b;
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c = this->c;
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d = this->d;
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do {
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saved_a = a;
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saved_b = b;
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saved_c = c;
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saved_d = d;
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// Round 1
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STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
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STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
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STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
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STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
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STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
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STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
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STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
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STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
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STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
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STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
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STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
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STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
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STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
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STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
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STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
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STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
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// Round 2
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STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
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STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
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STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
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STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
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STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
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STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
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STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
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STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
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STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
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STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
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STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
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STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
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STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
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STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
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STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
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STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
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// Round 3
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STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
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STEP(H, d, a, b, c, GET(8), 0x8771f681, 11)
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STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
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STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23)
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STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
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STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11)
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STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
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STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23)
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STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
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STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11)
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STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
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STEP(H, b, c, d, a, GET(6), 0x04881d05, 23)
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STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
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STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11)
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STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
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STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23)
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// Round 4
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STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
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STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
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STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
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STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
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STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
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STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
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STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
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STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
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STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
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STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
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STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
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STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
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STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
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STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
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STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
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STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
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a += saved_a;
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b += saved_b;
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c += saved_c;
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d += saved_d;
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ptr += 64;
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} while (Size -= 64);
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this->a = a;
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this->b = b;
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this->c = c;
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this->d = d;
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return ptr;
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}
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MD5::MD5()
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: a(0x67452301), b(0xefcdab89), c(0x98badcfe), d(0x10325476), hi(0), lo(0) {
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}
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/// Incrementally add the bytes in \p Data to the hash.
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void MD5::update(ArrayRef<uint8_t> Data) {
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MD5_u32plus saved_lo;
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unsigned long used, free;
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const uint8_t *Ptr = Data.data();
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unsigned long Size = Data.size();
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saved_lo = lo;
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if ((lo = (saved_lo + Size) & 0x1fffffff) < saved_lo)
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hi++;
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hi += Size >> 29;
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used = saved_lo & 0x3f;
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if (used) {
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free = 64 - used;
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if (Size < free) {
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memcpy(&buffer[used], Ptr, Size);
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return;
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}
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memcpy(&buffer[used], Ptr, free);
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Ptr = Ptr + free;
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Size -= free;
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body(ArrayRef<uint8_t>(buffer, 64));
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}
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if (Size >= 64) {
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Ptr = body(ArrayRef<uint8_t>(Ptr, Size & ~(unsigned long) 0x3f));
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Size &= 0x3f;
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}
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memcpy(buffer, Ptr, Size);
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}
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/// Add the bytes in the StringRef \p Str to the hash.
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// Note that this isn't a string and so this won't include any trailing NULL
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// bytes.
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void MD5::update(StringRef Str) {
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ArrayRef<uint8_t> SVal((const uint8_t *)Str.data(), Str.size());
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update(SVal);
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}
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/// \brief Finish the hash and place the resulting hash into \p result.
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/// \param result is assumed to be a minimum of 16-bytes in size.
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void MD5::final(MD5Result &result) {
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unsigned long used, free;
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used = lo & 0x3f;
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buffer[used++] = 0x80;
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free = 64 - used;
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if (free < 8) {
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memset(&buffer[used], 0, free);
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body(ArrayRef<uint8_t>(buffer, 64));
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used = 0;
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free = 64;
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}
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memset(&buffer[used], 0, free - 8);
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lo <<= 3;
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buffer[56] = lo;
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buffer[57] = lo >> 8;
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buffer[58] = lo >> 16;
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buffer[59] = lo >> 24;
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buffer[60] = hi;
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buffer[61] = hi >> 8;
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buffer[62] = hi >> 16;
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buffer[63] = hi >> 24;
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body(ArrayRef<uint8_t>(buffer, 64));
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result[0] = a;
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result[1] = a >> 8;
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result[2] = a >> 16;
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result[3] = a >> 24;
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result[4] = b;
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result[5] = b >> 8;
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result[6] = b >> 16;
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result[7] = b >> 24;
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result[8] = c;
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result[9] = c >> 8;
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result[10] = c >> 16;
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result[11] = c >> 24;
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result[12] = d;
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result[13] = d >> 8;
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result[14] = d >> 16;
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result[15] = d >> 24;
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}
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void MD5::stringifyResult(MD5Result &result, SmallString<32> &Str) {
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raw_svector_ostream Res(Str);
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for (int i = 0; i < 16; ++i)
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Res << format("%.2x", result[i]);
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}
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}
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