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https://github.com/cryb-to/cryb-to.git
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c6536641c5
- Use the new vector byte-order conversion functions where appropriate. - Use memset_s() instead of memset() where appropriate. - Use consistent names and types for function arguments. - Reindent, rename and reorganize to conform to Cryb style and idiom. SHA224 and SHA256 were left mostly unchanged. MD2 and MD4 were completely rewritten as the previous versions (taken from XySSL) seem to have been copied from RSAREF. This breaks the ABI as some context structures have grown or shrunk and some function arguments have been changed from int to size_t.
250 lines
7.3 KiB
C
250 lines
7.3 KiB
C
/*-
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* Copyright (c) 2012 The University of Oslo
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* Copyright (c) 2012-2016 Dag-Erling Smørgrav
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* All rights reserved.
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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 provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "cryb/impl.h"
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#include <stdint.h>
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#include <string.h>
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#include <cryb/bitwise.h>
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#include <cryb/endian.h>
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#include <cryb/memset_s.h>
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#include <cryb/md5.h>
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/*
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* MD5 - RFC 1321
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*/
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/* initial state */
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static const uint32_t md5_h[4] = {
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0x67452301UL, 0xefcdab89UL, 0x98badcfeUL, 0x10325476UL,
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};
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static const uint32_t md5_k[64] = {
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0xd76aa478UL, 0xe8c7b756UL, 0x242070dbUL, 0xc1bdceeeUL,
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0xf57c0fafUL, 0x4787c62aUL, 0xa8304613UL, 0xfd469501UL,
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0x698098d8UL, 0x8b44f7afUL, 0xffff5bb1UL, 0x895cd7beUL,
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0x6b901122UL, 0xfd987193UL, 0xa679438eUL, 0x49b40821UL,
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0xf61e2562UL, 0xc040b340UL, 0x265e5a51UL, 0xe9b6c7aaUL,
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0xd62f105dUL, 0x02441453UL, 0xd8a1e681UL, 0xe7d3fbc8UL,
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0x21e1cde6UL, 0xc33707d6UL, 0xf4d50d87UL, 0x455a14edUL,
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0xa9e3e905UL, 0xfcefa3f8UL, 0x676f02d9UL, 0x8d2a4c8aUL,
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0xfffa3942UL, 0x8771f681UL, 0x6d9d6122UL, 0xfde5380cUL,
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0xa4beea44UL, 0x4bdecfa9UL, 0xf6bb4b60UL, 0xbebfbc70UL,
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0x289b7ec6UL, 0xeaa127faUL, 0xd4ef3085UL, 0x04881d05UL,
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0xd9d4d039UL, 0xe6db99e5UL, 0x1fa27cf8UL, 0xc4ac5665UL,
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0xf4292244UL, 0x432aff97UL, 0xab9423a7UL, 0xfc93a039UL,
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0x655b59c3UL, 0x8f0ccc92UL, 0xffeff47dUL, 0x85845dd1UL,
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0x6fa87e4fUL, 0xfe2ce6e0UL, 0xa3014314UL, 0x4e0811a1UL,
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0xf7537e82UL, 0xbd3af235UL, 0x2ad7d2bbUL, 0xeb86d391UL,
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};
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void
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md5_init(md5_ctx *ctx)
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{
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memset(ctx, 0, sizeof *ctx);
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memcpy(ctx->state, md5_h, sizeof ctx->state);
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}
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#define md5_f(i, a, b, c, d, x, s) do { \
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(a) += (((b) & (c)) | (~(b) & (d))); \
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(a) += (x)[(i)] + md5_k[(i)]; \
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(a) = rol32((a), (s)) + (b); \
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} while (0)
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#define md5_g(i, a, b, c, d, x, s) do { \
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(a) += (((b) & (d)) | ((c) & ~(d))); \
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(a) += (x)[(5 * (i) + 1) % 16] + md5_k[(i)]; \
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(a) = rol32((a), (s)) + (b); \
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} while (0)
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#define md5_h(i, a, b, c, d, x, s) do { \
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(a) += ((b) ^ (c) ^ (d)); \
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(a) += (x)[(3 * (i) + 5) % 16] + md5_k[(i)]; \
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(a) = rol32((a), (s)) + (b); \
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} while (0)
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#define md5_i(i, a, b, c, d, x, s) do { \
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(a) += ((c) ^ ((b) | ~(d))); \
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(a) += (x)[(7 * (i)) % 16] + md5_k[(i)]; \
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(a) = rol32((a), (s)) + (b); \
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} while (0)
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static void
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md5_compute(md5_ctx *ctx, const uint8_t *block)
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{
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uint32_t w[16], a, b, c, d;
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le32decv(w, block, 16);
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a = ctx->state[0];
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b = ctx->state[1];
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c = ctx->state[2];
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d = ctx->state[3];
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md5_f( 0, a, b, c, d, w, 7);
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md5_f( 1, d, a, b, c, w, 12);
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md5_f( 2, c, d, a, b, w, 17);
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md5_f( 3, b, c, d, a, w, 22);
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md5_f( 4, a, b, c, d, w, 7);
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md5_f( 5, d, a, b, c, w, 12);
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md5_f( 6, c, d, a, b, w, 17);
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md5_f( 7, b, c, d, a, w, 22);
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md5_f( 8, a, b, c, d, w, 7);
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md5_f( 9, d, a, b, c, w, 12);
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md5_f(10, c, d, a, b, w, 17);
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md5_f(11, b, c, d, a, w, 22);
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md5_f(12, a, b, c, d, w, 7);
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md5_f(13, d, a, b, c, w, 12);
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md5_f(14, c, d, a, b, w, 17);
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md5_f(15, b, c, d, a, w, 22);
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md5_g(16, a, b, c, d, w, 5);
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md5_g(17, d, a, b, c, w, 9);
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md5_g(18, c, d, a, b, w, 14);
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md5_g(19, b, c, d, a, w, 20);
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md5_g(20, a, b, c, d, w, 5);
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md5_g(21, d, a, b, c, w, 9);
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md5_g(22, c, d, a, b, w, 14);
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md5_g(23, b, c, d, a, w, 20);
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md5_g(24, a, b, c, d, w, 5);
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md5_g(25, d, a, b, c, w, 9);
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md5_g(26, c, d, a, b, w, 14);
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md5_g(27, b, c, d, a, w, 20);
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md5_g(28, a, b, c, d, w, 5);
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md5_g(29, d, a, b, c, w, 9);
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md5_g(30, c, d, a, b, w, 14);
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md5_g(31, b, c, d, a, w, 20);
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md5_h(32, a, b, c, d, w, 4);
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md5_h(33, d, a, b, c, w, 11);
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md5_h(34, c, d, a, b, w, 16);
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md5_h(35, b, c, d, a, w, 23);
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md5_h(36, a, b, c, d, w, 4);
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md5_h(37, d, a, b, c, w, 11);
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md5_h(38, c, d, a, b, w, 16);
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md5_h(39, b, c, d, a, w, 23);
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md5_h(40, a, b, c, d, w, 4);
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md5_h(41, d, a, b, c, w, 11);
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md5_h(42, c, d, a, b, w, 16);
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md5_h(43, b, c, d, a, w, 23);
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md5_h(44, a, b, c, d, w, 4);
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md5_h(45, d, a, b, c, w, 11);
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md5_h(46, c, d, a, b, w, 16);
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md5_h(47, b, c, d, a, w, 23);
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md5_i(48, a, b, c, d, w, 6);
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md5_i(49, d, a, b, c, w, 10);
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md5_i(50, c, d, a, b, w, 15);
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md5_i(51, b, c, d, a, w, 21);
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md5_i(52, a, b, c, d, w, 6);
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md5_i(53, d, a, b, c, w, 10);
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md5_i(54, c, d, a, b, w, 15);
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md5_i(55, b, c, d, a, w, 21);
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md5_i(56, a, b, c, d, w, 6);
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md5_i(57, d, a, b, c, w, 10);
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md5_i(58, c, d, a, b, w, 15);
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md5_i(59, b, c, d, a, w, 21);
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md5_i(60, a, b, c, d, w, 6);
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md5_i(61, d, a, b, c, w, 10);
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md5_i(62, c, d, a, b, w, 15);
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md5_i(63, b, c, d, a, w, 21);
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ctx->state[0] += a;
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ctx->state[1] += b;
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ctx->state[2] += c;
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ctx->state[3] += d;
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}
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void
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md5_update(md5_ctx *ctx, const void *buf, size_t len)
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{
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size_t copylen;
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while (len) {
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if (ctx->blocklen > 0 || len < sizeof ctx->block) {
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copylen = sizeof ctx->block - ctx->blocklen;
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if (copylen > len)
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copylen = len;
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memcpy(ctx->block + ctx->blocklen, buf, copylen);
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ctx->blocklen += copylen;
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if (ctx->blocklen == sizeof ctx->block) {
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md5_compute(ctx, ctx->block);
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ctx->blocklen = 0;
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}
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} else {
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copylen = sizeof ctx->block;
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md5_compute(ctx, buf);
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}
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ctx->bitlen += copylen * 8;
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buf += copylen;
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len -= copylen;
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}
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}
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void
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md5_final(md5_ctx *ctx, uint8_t *digest)
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{
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ctx->block[ctx->blocklen++] = 0x80;
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memset(ctx->block + ctx->blocklen, 0,
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sizeof ctx->block - ctx->blocklen);
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if (ctx->blocklen > 56) {
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md5_compute(ctx, ctx->block);
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ctx->blocklen = 0;
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memset(ctx->block, 0, sizeof ctx->block);
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}
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le64enc(ctx->block + 56, ctx->bitlen);
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md5_compute(ctx, ctx->block);
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le32encv(digest, ctx->state, 4);
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memset_s(ctx, 0, sizeof *ctx, sizeof *ctx);
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}
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void
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md5_complete(const void *buf, size_t len, uint8_t *digest)
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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, buf, len);
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md5_final(&ctx, digest);
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}
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digest_algorithm md5_digest = {
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.name = "md5",
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.contextlen = sizeof(md5_ctx),
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.blocklen = MD5_BLOCK_LEN,
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.digestlen = MD5_DIGEST_LEN,
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.init = (digest_init_func)md5_init,
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.update = (digest_update_func)md5_update,
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.final = (digest_final_func)md5_final,
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.complete = (digest_complete_func)md5_complete,
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};
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