mirror of
https://github.com/guanzhi/GmSSL.git
synced 2026-05-13 11:56:28 +08:00
347
src/md5.c
347
src/md5.c
@@ -1,5 +1,5 @@
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/*
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* Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
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* Copyright 2022 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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@@ -7,176 +7,175 @@
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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#include <string.h>
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#include <gmssl/md5.h>
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#include <gmssl/endian.h>
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#define F(B, C, D) (((B) & (C)) | ((~(B)) & (D)))
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#define G(B, C, D) (((B) & (D)) | ((C) & (~(D))))
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#define H(B, C, D) ((B) ^ (C) ^ (D))
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#define I(B, C, D) ((C) ^ ((B) | (~(D))))
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static const uint32_t K[] = {
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0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
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0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
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0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
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0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
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0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
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0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
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0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
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0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
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0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
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0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
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0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
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0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
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0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
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0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
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0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
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0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
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};
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static const int S[] = {
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7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22,
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5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20,
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4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23,
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6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21,
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};
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static void md5_compress_blocks(uint32_t state[4],
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const unsigned char *data, size_t blocks)
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{
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uint32_t A;
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uint32_t B;
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uint32_t C;
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uint32_t D;
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uint32_t T;
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uint32_t W[16];
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int g, i;
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while (blocks--) {
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A = state[0];
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B = state[1];
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C = state[2];
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D = state[3];
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for (i = 0; i < 16; i++) {
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W[i] = GETU32_LE(data);
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data += sizeof(uint32_t);
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}
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for (i = 0; i < 16; i++) {
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T = ROL32(A + F(B, C, D) + W[i] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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for (; i < 32; i++) {
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g = (5 * i + 1) % 16;
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T = ROL32(A + G(B, C, D) + W[g] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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for (; i < 48; i++) {
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g = (3 * i + 5) % 16;
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T = ROL32(A + H(B, C, D) + W[g] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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for (; i < 64; i++) {
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g = (7 * i) % 16;
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T = ROL32(A + I(B, C, D) + W[g] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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state[0] += A;
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state[1] += B;
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state[2] += C;
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state[3] += D;
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}
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}
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void md5_init(MD5_CTX *ctx)
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{
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memset(ctx, 0, sizeof(*ctx));
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ctx->state[0] = 0x67452301;
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ctx->state[1] = 0xefcdab89;
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ctx->state[2] = 0x98badcfe;
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ctx->state[3] = 0x10325476;
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}
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void md5_update(MD5_CTX *ctx, const unsigned char *data, size_t datalen)
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{
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size_t blocks;
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ctx->num &= 0x3f;
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if (ctx->num) {
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size_t left = MD5_BLOCK_SIZE - ctx->num;
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if (datalen < left) {
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memcpy(ctx->block + ctx->num, data, datalen);
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ctx->num += datalen;
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return;
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} else {
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memcpy(ctx->block + ctx->num, data, left);
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md5_compress_blocks(ctx->state, ctx->block, 1);
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ctx->nblocks++;
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data += left;
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datalen -= left;
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}
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}
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blocks = datalen / MD5_BLOCK_SIZE;
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md5_compress_blocks(ctx->state, data, blocks);
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ctx->nblocks += blocks;
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data += MD5_BLOCK_SIZE * blocks;
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datalen -= MD5_BLOCK_SIZE * blocks;
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ctx->num = datalen;
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if (datalen) {
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memcpy(ctx->block, data, datalen);
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}
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}
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void md5_finish(MD5_CTX *ctx, unsigned char *dgst)
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{
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int i;
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ctx->num &= 0x3f;
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ctx->block[ctx->num] = 0x80;
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if (ctx->num <= MD5_BLOCK_SIZE - 9) {
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memset(ctx->block + ctx->num + 1, 0, MD5_BLOCK_SIZE - ctx->num - 9);
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} else {
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memset(ctx->block + ctx->num + 1, 0, MD5_BLOCK_SIZE - ctx->num - 1);
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md5_compress_blocks(ctx->state, ctx->block, 1);
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memset(ctx->block, 0, MD5_BLOCK_SIZE - 8);
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}
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PUTU64_LE(ctx->block + 56, (ctx->nblocks << 9) + (ctx->num << 3));
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md5_compress_blocks(ctx->state, ctx->block, 1);
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for (i = 0; i < 4; i++) {
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PUTU32_LE(dgst, ctx->state[i]);
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dgst += sizeof(uint32_t);
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}
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memset(ctx, 0, sizeof(*ctx));
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}
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void md5_digest(const unsigned char *data, size_t datalen,
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unsigned char dgst[MD5_DIGEST_SIZE])
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{
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MD5_CTX ctx;
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md5_init(&ctx);
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md5_update(&ctx, data, datalen);
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md5_finish(&ctx, dgst);
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}
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#include <string.h>
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#include <gmssl/md5.h>
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#include <gmssl/endian.h>
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#define F(B, C, D) (((B) & (C)) | ((~(B)) & (D)))
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#define G(B, C, D) (((B) & (D)) | ((C) & (~(D))))
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#define H(B, C, D) ((B) ^ (C) ^ (D))
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#define I(B, C, D) ((C) ^ ((B) | (~(D))))
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static const uint32_t K[] = {
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0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
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0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
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0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
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0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
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0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
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0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
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0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
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0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
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0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
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0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
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0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
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0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
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0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
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0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
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0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
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0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
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};
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static const int S[] = {
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7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22,
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5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20,
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4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23,
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6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21,
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};
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static void md5_compress_blocks(uint32_t state[4],
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const unsigned char *data, size_t blocks)
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{
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uint32_t A;
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uint32_t B;
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uint32_t C;
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uint32_t D;
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uint32_t T;
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uint32_t W[16];
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int g, i;
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while (blocks--) {
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A = state[0];
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B = state[1];
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C = state[2];
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D = state[3];
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for (i = 0; i < 16; i++) {
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W[i] = GETU32_LE(data);
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data += sizeof(uint32_t);
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}
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for (i = 0; i < 16; i++) {
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T = ROL32(A + F(B, C, D) + W[i] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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for (; i < 32; i++) {
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g = (5 * i + 1) % 16;
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T = ROL32(A + G(B, C, D) + W[g] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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for (; i < 48; i++) {
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g = (3 * i + 5) % 16;
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T = ROL32(A + H(B, C, D) + W[g] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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for (; i < 64; i++) {
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g = (7 * i) % 16;
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T = ROL32(A + I(B, C, D) + W[g] + K[i], S[i]) + B;
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A = D;
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D = C;
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C = B;
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B = T;
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}
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state[0] += A;
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state[1] += B;
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state[2] += C;
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state[3] += D;
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}
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}
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void md5_init(MD5_CTX *ctx)
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{
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memset(ctx, 0, sizeof(*ctx));
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ctx->state[0] = 0x67452301;
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ctx->state[1] = 0xefcdab89;
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ctx->state[2] = 0x98badcfe;
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ctx->state[3] = 0x10325476;
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}
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void md5_update(MD5_CTX *ctx, const unsigned char *data, size_t datalen)
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{
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||||
size_t blocks;
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||||
|
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ctx->num &= 0x3f;
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if (ctx->num) {
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size_t left = MD5_BLOCK_SIZE - ctx->num;
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||||
if (datalen < left) {
|
||||
memcpy(ctx->block + ctx->num, data, datalen);
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ctx->num += datalen;
|
||||
return;
|
||||
} else {
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||||
memcpy(ctx->block + ctx->num, data, left);
|
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md5_compress_blocks(ctx->state, ctx->block, 1);
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||||
ctx->nblocks++;
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||||
data += left;
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||||
datalen -= left;
|
||||
}
|
||||
}
|
||||
|
||||
blocks = datalen / MD5_BLOCK_SIZE;
|
||||
md5_compress_blocks(ctx->state, data, blocks);
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||||
ctx->nblocks += blocks;
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data += MD5_BLOCK_SIZE * blocks;
|
||||
datalen -= MD5_BLOCK_SIZE * blocks;
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||||
|
||||
ctx->num = datalen;
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if (datalen) {
|
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memcpy(ctx->block, data, datalen);
|
||||
}
|
||||
}
|
||||
|
||||
void md5_finish(MD5_CTX *ctx, unsigned char *dgst)
|
||||
{
|
||||
int i;
|
||||
|
||||
ctx->num &= 0x3f;
|
||||
ctx->block[ctx->num] = 0x80;
|
||||
|
||||
if (ctx->num <= MD5_BLOCK_SIZE - 9) {
|
||||
memset(ctx->block + ctx->num + 1, 0, MD5_BLOCK_SIZE - ctx->num - 9);
|
||||
} else {
|
||||
memset(ctx->block + ctx->num + 1, 0, MD5_BLOCK_SIZE - ctx->num - 1);
|
||||
md5_compress_blocks(ctx->state, ctx->block, 1);
|
||||
memset(ctx->block, 0, MD5_BLOCK_SIZE - 8);
|
||||
}
|
||||
PUTU64_LE(ctx->block + 56, (ctx->nblocks << 9) + (ctx->num << 3));
|
||||
md5_compress_blocks(ctx->state, ctx->block, 1);
|
||||
for (i = 0; i < 4; i++) {
|
||||
PUTU32_LE(dgst, ctx->state[i]);
|
||||
dgst += sizeof(uint32_t);
|
||||
}
|
||||
memset(ctx, 0, sizeof(*ctx));
|
||||
}
|
||||
|
||||
void md5_digest(const unsigned char *data, size_t datalen,
|
||||
unsigned char dgst[MD5_DIGEST_SIZE])
|
||||
{
|
||||
MD5_CTX ctx;
|
||||
md5_init(&ctx);
|
||||
md5_update(&ctx, data, datalen);
|
||||
md5_finish(&ctx, dgst);
|
||||
}
|
||||
|
||||
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