mirror of
https://gitee.com/acl-dev/acl.git
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297 lines
8.8 KiB
C++
297 lines
8.8 KiB
C++
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/* MS VisualStudio Projects are monolithic, so we need the following
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* #if to exclude the MD5 code from compile process when we are
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* building the SSL support.
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*/
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#include <assert.h>
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#include <stdio.h>
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#include "md5.h"
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#include <string.h>
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#ifdef WORDS_BIGENDIAN
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void byteSwap(uint32_t * buf, unsigned words)
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{
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uint8_t *p = (uint8_t *) buf;
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do {
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*buf++ = (uint32_t) ((unsigned) p[3] << 8 | p[2]) << 16 |
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((unsigned) p[1] << 8 | p[0]);
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p += 4;
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} while (--words);
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}
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#else
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#define byteSwap(buf,words)
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#endif
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/*
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* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
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* initialization constants.
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*/
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void MD5Init(struct MD5Context *ctx)
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{
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ctx->buf[0] = 0x67452301;
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ctx->buf[1] = 0xefcdab89;
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ctx->buf[2] = 0x98badcfe;
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ctx->buf[3] = 0x10325476;
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ctx->bytes[0] = 0;
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ctx->bytes[1] = 0;
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}
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/*
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* Update context to reflect the concatenation of another buffer full
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* of bytes.
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*/
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void MD5Update(struct MD5Context *ctx, const void *_buf, unsigned len)
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{
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const uint8_t *buf = (const uint8_t *) _buf;
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uint32_t t;
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/* Update byte count */
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t = ctx->bytes[0];
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if ((ctx->bytes[0] = t + len) < t)
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ctx->bytes[1]++; /* Carry from low to high */
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t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
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if (t > len) {
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memcpy((uint8_t *) ctx->in + 64 - t, buf, len);
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return;
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}
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/* First chunk is an odd size */
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memcpy((uint8_t *) ctx->in + 64 - t, buf, t);
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byteSwap(ctx->in, 16);
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MD5Transform(ctx->buf, ctx->in);
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buf += t;
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len -= t;
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/* Process data in 64-byte chunks */
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while (len >= 64) {
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memcpy(ctx->in, buf, 64);
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byteSwap(ctx->in, 16);
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MD5Transform(ctx->buf, ctx->in);
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buf += 64;
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len -= 64;
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}
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/* Handle any remaining bytes of data. */
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memcpy(ctx->in, buf, len);
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}
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/*
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* Final wrapup - pad to 64-byte boundary with the bit pattern
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* 1 0* (64-bit count of bits processed, MSB-first)
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*/
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void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
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{
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int count = ctx->bytes[0] & 0x3f; /* Number of bytes in ctx->in */
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uint8_t *p = (uint8_t *) ctx->in + count;
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/* Set the first char of padding to 0x80. There is always room. */
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*p++ = 0x80;
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/* Bytes of padding needed to make 56 bytes (-8..55) */
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count = 56 - 1 - count;
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if (count < 0) { /* Padding forces an extra block */
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memset(p, 0, count + 8);
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byteSwap(ctx->in, 16);
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MD5Transform(ctx->buf, ctx->in);
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p = (uint8_t *) ctx->in;
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count = 56;
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}
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memset(p, 0, count);
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byteSwap(ctx->in, 14);
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/* Append length in bits and transform */
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ctx->in[14] = ctx->bytes[0] << 3;
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ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
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MD5Transform(ctx->buf, ctx->in);
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byteSwap(ctx->buf, 4);
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memcpy(digest, ctx->buf, 16);
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memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
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}
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/* The four core functions - F1 is optimized somewhat */
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/* #define F1(x, y, z) (x & y | ~x & z) */
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#define F1(x, y, z) (z ^ (x & (y ^ z)))
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#define F2(x, y, z) F1(z, x, y)
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#define F3(x, y, z) (x ^ y ^ z)
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#define F4(x, y, z) (y ^ (x | ~z))
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/* This is the central step in the MD5 algorithm. */
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#define MD5STEP(f,w,x,y,z,in,s) \
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(w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
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/*
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* The core of the MD5 algorithm, this alters an existing MD5 hash to
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* reflect the addition of 16 longwords of new data. MD5Update blocks
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* the data and converts bytes into longwords for this routine.
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*/
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void MD5Transform(uint32_t buf[4], uint32_t const in[16])
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{
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register uint32_t a, b, c, d;
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a = buf[0];
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b = buf[1];
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c = buf[2];
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d = buf[3];
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MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
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MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
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MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
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MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
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MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
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MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
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MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
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MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
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MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
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MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
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MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
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MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
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MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
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MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
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MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
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MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
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MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
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MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
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MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
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MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
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MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
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MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
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MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
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MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
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MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
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MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
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MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
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MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
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MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
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MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
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MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
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MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
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MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
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MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
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MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
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MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
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MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
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MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
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MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
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MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
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MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
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MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
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MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
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MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
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MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
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MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
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MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
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MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
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MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
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MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
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MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
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MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
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MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
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MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
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MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
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MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
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MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
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MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
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MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
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MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
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MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
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MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
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MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
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MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
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buf[0] += a;
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buf[1] += b;
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buf[2] += c;
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buf[3] += d;
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}
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const char* MD5Key(const char *s, size_t s_len, const char *k, size_t k_len, void* buf, size_t b_len)
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{
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MD5_CTX context;
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unsigned char digest[16];
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if (b_len != 16) {
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printf("b_len(%d) != 16\n", (int) b_len);
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assert(0);
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}
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MD5Init(&context);
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if (k != NULL && k_len > 0)
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MD5Update(&context, (const unsigned char *) k, (unsigned int) k_len);
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MD5Update(&context, (const unsigned char*) s, (unsigned int) s_len);
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MD5Final(digest, &context);
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memcpy(buf, digest, b_len);
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return ((const char*) buf);
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}
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const char* MD5String(const char *s, const char *k, size_t k_len, char* buf, size_t size)
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{
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MD5_CTX context;
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unsigned char digest[16];
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char output1[34], *ptr;
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unsigned int len = (unsigned int) strlen(s);
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size_t i, n;
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MD5Init(&context);
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if (k != NULL && k_len > 0)
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MD5Update(&context, (const unsigned char *) k, (unsigned int) k_len);
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MD5Update(&context, (const unsigned char*) s, (unsigned int) len);
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MD5Final(digest, &context);
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for (i = 0; i < 16; i++) {
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snprintf(&(output1[2 * i]), 1, "%02x", (unsigned char) digest[i]);
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snprintf(&(output1[2 * i + 1]), 1, "%02x", (unsigned char) (digest[i] << 4));
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}
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ptr = buf;
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size--; /* left one byte for '\0' */
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n = size > 32 ? 32 : size;
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for(i = 0; i < n; i++)
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*ptr++ = output1[i];
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*ptr = '\0';
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return (buf);
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}
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const char* MD5Key2String(const unsigned char *s, size_t s_len, char* buf, size_t size)
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{
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size_t i, n;
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char output1[34], *ptr;
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unsigned char digest[16];
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if (s_len != 16) {
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printf("s_len(%d) != 16\n", (int) s_len);
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assert(0);
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}
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if (size < 32) {
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printf("size(%d) < 32\n", (int) size);
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assert(0);
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}
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memcpy(digest, s, 16);
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for (i = 0; i < 16; i++) {
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snprintf(&(output1[2 * i]), 1, "%02x", (unsigned char) digest[i]);
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snprintf(&(output1[2 * i + 1]), 1, "%02x", (unsigned char) (digest[i] << 4));
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}
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ptr = buf;
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size--; /* left one byte for '\0' */
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n = size > 32 ? 32 : size;
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for(i = 0; i < n; i++)
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*ptr++ = output1[i];
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*ptr = '\0';
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return (buf);
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}
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