diff options
Diffstat (limited to 'md5.c')
| -rw-r--r-- | md5.c | 276 |
1 files changed, 276 insertions, 0 deletions
@@ -0,0 +1,276 @@ +/*
+ **********************************************************************
+ ** md5.c **
+ ** RSA Data Security, Inc. MD5 Message Digest Algorithm **
+ ** Created: 2/17/90 RLR **
+ ** Revised: 1/91 SRD,AJ,BSK,JT Reference C Version **
+ **********************************************************************
+ */
+
+/*
+ **********************************************************************
+ ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
+ ** **
+ ** License to copy and use this software is granted provided that **
+ ** it is identified as the "RSA Data Security, Inc. MD5 Message **
+ ** Digest Algorithm" in all material mentioning or referencing this **
+ ** software or this function. **
+ ** **
+ ** License is also granted to make and use derivative works **
+ ** provided that such works are identified as "derived from the RSA **
+ ** Data Security, Inc. MD5 Message Digest Algorithm" in all **
+ ** material mentioning or referencing the derived work. **
+ ** **
+ ** RSA Data Security, Inc. makes no representations concerning **
+ ** either the merchantability of this software or the suitability **
+ ** of this software for any particular purpose. It is provided "as **
+ ** is" without express or implied warranty of any kind. **
+ ** **
+ ** These notices must be retained in any copies of any part of this **
+ ** documentation and/or software. **
+ **********************************************************************
+ */
+
+/* -- include the following line if the md5.h header file is separate -- */
+#include "md5.h"
+
+/* forward declaration */
+static void Transform ();
+
+static unsigned char PADDING[64] = {
+ 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+/* F, G and H are basic MD5 functions: selection, majority, parity */
+#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | (~z)))
+
+/* ROTATE_LEFT rotates x left n bits */
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+
+/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
+/* Rotation is separate from addition to prevent recomputation */
+#define FF(a, b, c, d, x, s, ac) \
+ {(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+ }
+#define GG(a, b, c, d, x, s, ac) \
+ {(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+ }
+#define HH(a, b, c, d, x, s, ac) \
+ {(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+ }
+#define II(a, b, c, d, x, s, ac) \
+ {(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+ }
+
+void MD5Init (mdContext)
+MD5_CTX *mdContext;
+{
+ mdContext->i[0] = mdContext->i[1] = (UINT4)0;
+
+ /* Load magic initialization constants.
+ */
+ mdContext->buf[0] = (UINT4)0x67452301;
+ mdContext->buf[1] = (UINT4)0xefcdab89;
+ mdContext->buf[2] = (UINT4)0x98badcfe;
+ mdContext->buf[3] = (UINT4)0x10325476;
+}
+
+void MD5Update (mdContext, inBuf, inLen)
+MD5_CTX *mdContext;
+unsigned char *inBuf;
+unsigned int inLen;
+{
+ UINT4 in[16];
+ int mdi;
+ unsigned int i, ii;
+
+ /* compute number of bytes mod 64 */
+ mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
+
+ /* update number of bits */
+ if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0])
+ mdContext->i[1]++;
+ mdContext->i[0] += ((UINT4)inLen << 3);
+ mdContext->i[1] += ((UINT4)inLen >> 29);
+
+ while (inLen--) {
+ /* add new character to buffer, increment mdi */
+ mdContext->in[mdi++] = *inBuf++;
+
+ /* transform if necessary */
+ if (mdi == 0x40) {
+ for (i = 0, ii = 0; i < 16; i++, ii += 4)
+ in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
+ (((UINT4)mdContext->in[ii+2]) << 16) |
+ (((UINT4)mdContext->in[ii+1]) << 8) |
+ ((UINT4)mdContext->in[ii]);
+ Transform (mdContext->buf, in);
+ mdi = 0;
+ }
+ }
+}
+
+void MD5Final (mdContext)
+MD5_CTX *mdContext;
+{
+ UINT4 in[16];
+ int mdi;
+ unsigned int i, ii;
+ unsigned int padLen;
+
+ /* save number of bits */
+ in[14] = mdContext->i[0];
+ in[15] = mdContext->i[1];
+
+ /* compute number of bytes mod 64 */
+ mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
+
+ /* pad out to 56 mod 64 */
+ padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
+ MD5Update (mdContext, PADDING, padLen);
+
+ /* append length in bits and transform */
+ for (i = 0, ii = 0; i < 14; i++, ii += 4)
+ in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
+ (((UINT4)mdContext->in[ii+2]) << 16) |
+ (((UINT4)mdContext->in[ii+1]) << 8) |
+ ((UINT4)mdContext->in[ii]);
+ Transform (mdContext->buf, in);
+
+ /* store buffer in digest */
+ for (i = 0, ii = 0; i < 4; i++, ii += 4) {
+ mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
+ mdContext->digest[ii+1] =
+ (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
+ mdContext->digest[ii+2] =
+ (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
+ mdContext->digest[ii+3] =
+ (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
+ }
+}
+
+/* Basic MD5 step. Transform buf based on in.
+ */
+static void Transform (buf, in)
+UINT4 *buf;
+UINT4 *in;
+{
+ UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3];
+
+ /* Round 1 */
+#define S11 7
+#define S12 12
+#define S13 17
+#define S14 22
+ FF ( a, b, c, d, in[ 0], S11, 3614090360U); /* 1 */
+ FF ( d, a, b, c, in[ 1], S12, 3905402710U); /* 2 */
+ FF ( c, d, a, b, in[ 2], S13, 606105819U); /* 3 */
+ FF ( b, c, d, a, in[ 3], S14, 3250441966U); /* 4 */
+ FF ( a, b, c, d, in[ 4], S11, 4118548399U); /* 5 */
+ FF ( d, a, b, c, in[ 5], S12, 1200080426U); /* 6 */
+ FF ( c, d, a, b, in[ 6], S13, 2821735955U); /* 7 */
+ FF ( b, c, d, a, in[ 7], S14, 4249261313U); /* 8 */
+ FF ( a, b, c, d, in[ 8], S11, 1770035416U); /* 9 */
+ FF ( d, a, b, c, in[ 9], S12, 2336552879U); /* 10 */
+ FF ( c, d, a, b, in[10], S13, 4294925233U); /* 11 */
+ FF ( b, c, d, a, in[11], S14, 2304563134U); /* 12 */
+ FF ( a, b, c, d, in[12], S11, 1804603682U); /* 13 */
+ FF ( d, a, b, c, in[13], S12, 4254626195U); /* 14 */
+ FF ( c, d, a, b, in[14], S13, 2792965006U); /* 15 */
+ FF ( b, c, d, a, in[15], S14, 1236535329U); /* 16 */
+
+ /* Round 2 */
+#define S21 5
+#define S22 9
+#define S23 14
+#define S24 20
+ GG ( a, b, c, d, in[ 1], S21, 4129170786U); /* 17 */
+ GG ( d, a, b, c, in[ 6], S22, 3225465664U); /* 18 */
+ GG ( c, d, a, b, in[11], S23, 643717713U); /* 19 */
+ GG ( b, c, d, a, in[ 0], S24, 3921069994U); /* 20 */
+ GG ( a, b, c, d, in[ 5], S21, 3593408605U); /* 21 */
+ GG ( d, a, b, c, in[10], S22, 38016083U); /* 22 */
+ GG ( c, d, a, b, in[15], S23, 3634488961U); /* 23 */
+ GG ( b, c, d, a, in[ 4], S24, 3889429448U); /* 24 */
+ GG ( a, b, c, d, in[ 9], S21, 568446438U); /* 25 */
+ GG ( d, a, b, c, in[14], S22, 3275163606U); /* 26 */
+ GG ( c, d, a, b, in[ 3], S23, 4107603335U); /* 27 */
+ GG ( b, c, d, a, in[ 8], S24, 1163531501U); /* 28 */
+ GG ( a, b, c, d, in[13], S21, 2850285829U); /* 29 */
+ GG ( d, a, b, c, in[ 2], S22, 4243563512U); /* 30 */
+ GG ( c, d, a, b, in[ 7], S23, 1735328473U); /* 31 */
+ GG ( b, c, d, a, in[12], S24, 2368359562U); /* 32 */
+
+ /* Round 3 */
+#define S31 4
+#define S32 11
+#define S33 16
+#define S34 23
+ HH ( a, b, c, d, in[ 5], S31, 4294588738U); /* 33 */
+ HH ( d, a, b, c, in[ 8], S32, 2272392833U); /* 34 */
+ HH ( c, d, a, b, in[11], S33, 1839030562U); /* 35 */
+ HH ( b, c, d, a, in[14], S34, 4259657740U); /* 36 */
+ HH ( a, b, c, d, in[ 1], S31, 2763975236U); /* 37 */
+ HH ( d, a, b, c, in[ 4], S32, 1272893353U); /* 38 */
+ HH ( c, d, a, b, in[ 7], S33, 4139469664U); /* 39 */
+ HH ( b, c, d, a, in[10], S34, 3200236656U); /* 40 */
+ HH ( a, b, c, d, in[13], S31, 681279174U); /* 41 */
+ HH ( d, a, b, c, in[ 0], S32, 3936430074U); /* 42 */
+ HH ( c, d, a, b, in[ 3], S33, 3572445317U); /* 43 */
+ HH ( b, c, d, a, in[ 6], S34, 76029189U); /* 44 */
+ HH ( a, b, c, d, in[ 9], S31, 3654602809U); /* 45 */
+ HH ( d, a, b, c, in[12], S32, 3873151461U); /* 46 */
+ HH ( c, d, a, b, in[15], S33, 530742520U); /* 47 */
+ HH ( b, c, d, a, in[ 2], S34, 3299628645U); /* 48 */
+
+ /* Round 4 */
+#define S41 6
+#define S42 10
+#define S43 15
+#define S44 21
+ II ( a, b, c, d, in[ 0], S41, 4096336452U); /* 49 */
+ II ( d, a, b, c, in[ 7], S42, 1126891415U); /* 50 */
+ II ( c, d, a, b, in[14], S43, 2878612391U); /* 51 */
+ II ( b, c, d, a, in[ 5], S44, 4237533241U); /* 52 */
+ II ( a, b, c, d, in[12], S41, 1700485571U); /* 53 */
+ II ( d, a, b, c, in[ 3], S42, 2399980690U); /* 54 */
+ II ( c, d, a, b, in[10], S43, 4293915773U); /* 55 */
+ II ( b, c, d, a, in[ 1], S44, 2240044497U); /* 56 */
+ II ( a, b, c, d, in[ 8], S41, 1873313359U); /* 57 */
+ II ( d, a, b, c, in[15], S42, 4264355552U); /* 58 */
+ II ( c, d, a, b, in[ 6], S43, 2734768916U); /* 59 */
+ II ( b, c, d, a, in[13], S44, 1309151649U); /* 60 */
+ II ( a, b, c, d, in[ 4], S41, 4149444226U); /* 61 */
+ II ( d, a, b, c, in[11], S42, 3174756917U); /* 62 */
+ II ( c, d, a, b, in[ 2], S43, 718787259U); /* 63 */
+ II ( b, c, d, a, in[ 9], S44, 3951481745U); /* 64 */
+
+ buf[0] += a;
+ buf[1] += b;
+ buf[2] += c;
+ buf[3] += d;
+}
+
+/*
+ **********************************************************************
+ ** End of md5.c **
+ ******************************* (cut) ********************************
+ */
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