| //===-- tsan_md5.cc -------------------------------------------------------===// |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of ThreadSanitizer (TSan), a race detector. |
| // |
| //===----------------------------------------------------------------------===// |
| #include "tsan_defs.h" |
| |
| namespace __tsan { |
| |
| #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z)))) |
| #define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y)))) |
| #define H(x, y, z) ((x) ^ (y) ^ (z)) |
| #define I(x, y, z) ((y) ^ ((x) | ~(z))) |
| |
| #define STEP(f, a, b, c, d, x, t, s) \ |
| (a) += f((b), (c), (d)) + (x) + (t); \ |
| (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \ |
| (a) += (b); |
| |
| #define SET(n) \ |
| (*(const MD5_u32plus *)&ptr[(n) * 4]) |
| #define GET(n) \ |
| SET(n) |
| |
| typedef unsigned int MD5_u32plus; |
| typedef unsigned long ulong_t; // NOLINT |
| |
| typedef struct { |
| MD5_u32plus lo, hi; |
| MD5_u32plus a, b, c, d; |
| unsigned char buffer[64]; |
| MD5_u32plus block[16]; |
| } MD5_CTX; |
| |
| static const void *body(MD5_CTX *ctx, const void *data, ulong_t size) { |
| const unsigned char *ptr = (const unsigned char *)data; |
| MD5_u32plus a, b, c, d; |
| MD5_u32plus saved_a, saved_b, saved_c, saved_d; |
| |
| a = ctx->a; |
| b = ctx->b; |
| c = ctx->c; |
| d = ctx->d; |
| |
| do { |
| saved_a = a; |
| saved_b = b; |
| saved_c = c; |
| saved_d = d; |
| |
| STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7) |
| STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12) |
| STEP(F, c, d, a, b, SET(2), 0x242070db, 17) |
| STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22) |
| STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7) |
| STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12) |
| STEP(F, c, d, a, b, SET(6), 0xa8304613, 17) |
| STEP(F, b, c, d, a, SET(7), 0xfd469501, 22) |
| STEP(F, a, b, c, d, SET(8), 0x698098d8, 7) |
| STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12) |
| STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17) |
| STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22) |
| STEP(F, a, b, c, d, SET(12), 0x6b901122, 7) |
| STEP(F, d, a, b, c, SET(13), 0xfd987193, 12) |
| STEP(F, c, d, a, b, SET(14), 0xa679438e, 17) |
| STEP(F, b, c, d, a, SET(15), 0x49b40821, 22) |
| |
| STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5) |
| STEP(G, d, a, b, c, GET(6), 0xc040b340, 9) |
| STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14) |
| STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20) |
| STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5) |
| STEP(G, d, a, b, c, GET(10), 0x02441453, 9) |
| STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14) |
| STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20) |
| STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5) |
| STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9) |
| STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14) |
| STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20) |
| STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5) |
| STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9) |
| STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14) |
| STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20) |
| |
| STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4) |
| STEP(H, d, a, b, c, GET(8), 0x8771f681, 11) |
| STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16) |
| STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23) |
| STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4) |
| STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11) |
| STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16) |
| STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23) |
| STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4) |
| STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11) |
| STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16) |
| STEP(H, b, c, d, a, GET(6), 0x04881d05, 23) |
| STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4) |
| STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11) |
| STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16) |
| STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23) |
| |
| STEP(I, a, b, c, d, GET(0), 0xf4292244, 6) |
| STEP(I, d, a, b, c, GET(7), 0x432aff97, 10) |
| STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15) |
| STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21) |
| STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6) |
| STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10) |
| STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15) |
| STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21) |
| STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6) |
| STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10) |
| STEP(I, c, d, a, b, GET(6), 0xa3014314, 15) |
| STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21) |
| STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6) |
| STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10) |
| STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15) |
| STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21) |
| |
| a += saved_a; |
| b += saved_b; |
| c += saved_c; |
| d += saved_d; |
| |
| ptr += 64; |
| } while (size -= 64); |
| |
| ctx->a = a; |
| ctx->b = b; |
| ctx->c = c; |
| ctx->d = d; |
| |
| return ptr; |
| } |
| |
| void MD5_Init(MD5_CTX *ctx) { |
| ctx->a = 0x67452301; |
| ctx->b = 0xefcdab89; |
| ctx->c = 0x98badcfe; |
| ctx->d = 0x10325476; |
| |
| ctx->lo = 0; |
| ctx->hi = 0; |
| } |
| |
| void MD5_Update(MD5_CTX *ctx, const void *data, ulong_t size) { |
| MD5_u32plus saved_lo; |
| ulong_t used, free; |
| |
| saved_lo = ctx->lo; |
| if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo) |
| ctx->hi++; |
| ctx->hi += size >> 29; |
| |
| used = saved_lo & 0x3f; |
| |
| if (used) { |
| free = 64 - used; |
| |
| if (size < free) { |
| internal_memcpy(&ctx->buffer[used], data, size); |
| return; |
| } |
| |
| internal_memcpy(&ctx->buffer[used], data, free); |
| data = (const unsigned char *)data + free; |
| size -= free; |
| body(ctx, ctx->buffer, 64); |
| } |
| |
| if (size >= 64) { |
| data = body(ctx, data, size & ~(ulong_t)0x3f); |
| size &= 0x3f; |
| } |
| |
| internal_memcpy(ctx->buffer, data, size); |
| } |
| |
| void MD5_Final(unsigned char *result, MD5_CTX *ctx) { |
| ulong_t used, free; |
| |
| used = ctx->lo & 0x3f; |
| |
| ctx->buffer[used++] = 0x80; |
| |
| free = 64 - used; |
| |
| if (free < 8) { |
| internal_memset(&ctx->buffer[used], 0, free); |
| body(ctx, ctx->buffer, 64); |
| used = 0; |
| free = 64; |
| } |
| |
| internal_memset(&ctx->buffer[used], 0, free - 8); |
| |
| ctx->lo <<= 3; |
| ctx->buffer[56] = ctx->lo; |
| ctx->buffer[57] = ctx->lo >> 8; |
| ctx->buffer[58] = ctx->lo >> 16; |
| ctx->buffer[59] = ctx->lo >> 24; |
| ctx->buffer[60] = ctx->hi; |
| ctx->buffer[61] = ctx->hi >> 8; |
| ctx->buffer[62] = ctx->hi >> 16; |
| ctx->buffer[63] = ctx->hi >> 24; |
| |
| body(ctx, ctx->buffer, 64); |
| |
| result[0] = ctx->a; |
| result[1] = ctx->a >> 8; |
| result[2] = ctx->a >> 16; |
| result[3] = ctx->a >> 24; |
| result[4] = ctx->b; |
| result[5] = ctx->b >> 8; |
| result[6] = ctx->b >> 16; |
| result[7] = ctx->b >> 24; |
| result[8] = ctx->c; |
| result[9] = ctx->c >> 8; |
| result[10] = ctx->c >> 16; |
| result[11] = ctx->c >> 24; |
| result[12] = ctx->d; |
| result[13] = ctx->d >> 8; |
| result[14] = ctx->d >> 16; |
| result[15] = ctx->d >> 24; |
| |
| internal_memset(ctx, 0, sizeof(*ctx)); |
| } |
| |
| MD5Hash md5_hash(const void *data, uptr size) { |
| MD5Hash res; |
| MD5_CTX ctx; |
| MD5_Init(&ctx); |
| MD5_Update(&ctx, data, size); |
| MD5_Final((unsigned char*)&res.hash[0], &ctx); |
| return res; |
| } |
| } // namespace __tsan |