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Data Structures | |
| struct | MD5Context |
Typedefs | |
| typedef unsigned long | uint32 |
Functions | |
| void | MD5Init (struct MD5Context *context) |
| void | MD5Update (struct MD5Context *context, unsigned char const *buf, unsigned len) |
| void | MD5Final (unsigned char digest[16], struct MD5Context *context) |
| void | MD5Transform (uint32 buf[4], uint32 const in[16]) |
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Definition at line 7 of file md5.h. Referenced by byteReverse(), MD5Final(), MD5Transform(), and MD5Update(). |
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Definition at line 116 of file md5.c. References MD5Context::bits, MD5Context::buf, byteReverse(), MD5Context::in, MD5Transform(), and uint32.
00117 {
00118 unsigned count;
00119 unsigned char *p;
00120
00121 /* Compute number of bytes mod 64 */
00122 count = (ctx->bits[0] >> 3) & 0x3F;
00123
00124 /* Set the first char of padding to 0x80. This is safe since there is
00125 always at least one byte free */
00126 p = ctx->in + count;
00127 *p++ = 0x80;
00128
00129 /* Bytes of padding needed to make 64 bytes */
00130 count = 64 - 1 - count;
00131
00132 /* Pad out to 56 mod 64 */
00133 if (count < 8) {
00134 /* Two lots of padding: Pad the first block to 64 bytes */
00135 memset(p, 0, count);
00136 byteReverse(ctx->in, 16);
00137 MD5Transform(ctx->buf, (uint32 *) ctx->in);
00138
00139 /* Now fill the next block with 56 bytes */
00140 memset(ctx->in, 0, 56);
00141 } else {
00142 /* Pad block to 56 bytes */
00143 memset(p, 0, count - 8);
00144 }
00145 byteReverse(ctx->in, 14);
00146
00147 /* Append length in bits and transform */
00148 ((uint32 *) ctx->in)[14] = ctx->bits[0];
00149 ((uint32 *) ctx->in)[15] = ctx->bits[1];
00150
00151 MD5Transform(ctx->buf, (uint32 *) ctx->in);
00152 byteReverse((unsigned char *) ctx->buf, 4);
00153 memcpy(digest, ctx->buf, 16);
00154 memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
00155 }
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Definition at line 53 of file md5.c. References MD5Context::bits, and MD5Context::buf.
00054 {
00055 ctx->buf[0] = 0x67452301;
00056 ctx->buf[1] = 0xefcdab89;
00057 ctx->buf[2] = 0x98badcfe;
00058 ctx->buf[3] = 0x10325476;
00059
00060 ctx->bits[0] = 0;
00061 ctx->bits[1] = 0;
00062 }
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Definition at line 176 of file md5.c. References F1, F2, F3, F4, MD5STEP, and uint32. Referenced by MD5Final(), and MD5Update().
00177 {
00178 register uint32 a, b, c, d;
00179
00180 a = buf[0];
00181 b = buf[1];
00182 c = buf[2];
00183 d = buf[3];
00184
00185 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
00186 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
00187 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
00188 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
00189 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
00190 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
00191 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
00192 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
00193 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
00194 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
00195 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
00196 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
00197 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
00198 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
00199 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
00200 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
00201
00202 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
00203 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
00204 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
00205 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
00206 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
00207 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
00208 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
00209 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
00210 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
00211 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
00212 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
00213 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
00214 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
00215 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
00216 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
00217 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
00218
00219 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
00220 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
00221 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
00222 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
00223 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
00224 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
00225 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
00226 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
00227 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
00228 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
00229 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
00230 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
00231 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
00232 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
00233 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
00234 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
00235
00236 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
00237 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
00238 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
00239 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
00240 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
00241 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
00242 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
00243 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
00244 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
00245 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
00246 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
00247 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
00248 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
00249 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
00250 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
00251 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
00252
00253 buf[0] += a;
00254 buf[1] += b;
00255 buf[2] += c;
00256 buf[3] += d;
00257 }
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Definition at line 68 of file md5.c. References MD5Context::bits, MD5Context::buf, byteReverse(), MD5Context::in, MD5Transform(), and uint32.
00069 {
00070 uint32 t;
00071
00072 /* Update bitcount */
00073
00074 t = ctx->bits[0];
00075 if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)
00076 ctx->bits[1]++; /* Carry from low to high */
00077 ctx->bits[1] += len >> 29;
00078
00079 t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
00080
00081 /* Handle any leading odd-sized chunks */
00082
00083 if (t) {
00084 unsigned char *p = (unsigned char *) ctx->in + t;
00085
00086 t = 64 - t;
00087 if (len < t) {
00088 memcpy(p, buf, len);
00089 return;
00090 }
00091 memcpy(p, buf, t);
00092 byteReverse(ctx->in, 16);
00093 MD5Transform(ctx->buf, (uint32 *) ctx->in);
00094 buf += t;
00095 len -= t;
00096 }
00097 /* Process data in 64-byte chunks */
00098
00099 while (len >= 64) {
00100 memcpy(ctx->in, buf, 64);
00101 byteReverse(ctx->in, 16);
00102 MD5Transform(ctx->buf, (uint32 *) ctx->in);
00103 buf += 64;
00104 len -= 64;
00105 }
00106
00107 /* Handle any remaining bytes of data. */
00108
00109 memcpy(ctx->in, buf, len);
00110 }
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1.3.5