#include <inttypes.h>
Go to the source code of this file.
Data Structures | |
struct | MD5Context |
Functions | |
void | MD5Final (unsigned char digest[16], struct MD5Context *context) |
void | MD5Init (struct MD5Context *context) |
void | MD5Transform (uint32_t buf[4], uint32_t const in[16]) |
void | MD5Update (struct MD5Context *context, unsigned char const *buf, unsigned len) |
Definition in file md5.h.
void MD5Final | ( | unsigned char | digest[16], | |
struct MD5Context * | context | |||
) |
Definition at line 124 of file md5.c.
References MD5Context::bits, MD5Context::buf, byteReverse(), MD5Context::in, and MD5Transform().
Referenced by ast_md5_hash(), authenticate(), authenticate_verify(), decrypt_frame(), festival_exec(), prov_ver_calc(), register_verify(), try_firmware(), try_load_key(), and verify_key().
00125 { 00126 unsigned count; 00127 unsigned char *p; 00128 00129 /* Compute number of bytes mod 64 */ 00130 count = (ctx->bits[0] >> 3) & 0x3F; 00131 00132 /* Set the first char of padding to 0x80. This is safe since there is 00133 always at least one byte free */ 00134 p = ctx->in + count; 00135 *p++ = 0x80; 00136 00137 /* Bytes of padding needed to make 64 bytes */ 00138 count = 64 - 1 - count; 00139 00140 /* Pad out to 56 mod 64 */ 00141 if (count < 8) { 00142 /* Two lots of padding: Pad the first block to 64 bytes */ 00143 memset(p, 0, count); 00144 byteReverse(ctx->in, 16); 00145 MD5Transform(ctx->buf, (uint32_t *) ctx->in); 00146 00147 /* Now fill the next block with 56 bytes */ 00148 memset(ctx->in, 0, 56); 00149 } else { 00150 /* Pad block to 56 bytes */ 00151 memset(p, 0, count - 8); 00152 } 00153 byteReverse(ctx->in, 14); 00154 00155 /* Append length in bits and transform */ 00156 ((uint32_t *) ctx->in)[14] = ctx->bits[0]; 00157 ((uint32_t *) ctx->in)[15] = ctx->bits[1]; 00158 00159 MD5Transform(ctx->buf, (uint32_t *) ctx->in); 00160 byteReverse((unsigned char *) ctx->buf, 4); 00161 memcpy(digest, ctx->buf, 16); 00162 memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */ 00163 }
void MD5Init | ( | struct MD5Context * | context | ) |
Definition at line 61 of file md5.c.
References MD5Context::bits, and MD5Context::buf.
Referenced by ast_md5_hash(), authenticate(), authenticate_verify(), decrypt_frame(), festival_exec(), prov_ver_calc(), register_verify(), try_firmware(), try_load_key(), and verify_key().
00062 { 00063 ctx->buf[0] = 0x67452301; 00064 ctx->buf[1] = 0xefcdab89; 00065 ctx->buf[2] = 0x98badcfe; 00066 ctx->buf[3] = 0x10325476; 00067 00068 ctx->bits[0] = 0; 00069 ctx->bits[1] = 0; 00070 }
void MD5Transform | ( | uint32_t | buf[4], | |
uint32_t const | in[16] | |||
) |
Definition at line 184 of file md5.c.
References F1, F2, F3, F4, and MD5STEP.
Referenced by MD5Final(), and MD5Update().
00185 { 00186 register uint32_t a, b, c, d; 00187 00188 a = buf[0]; 00189 b = buf[1]; 00190 c = buf[2]; 00191 d = buf[3]; 00192 00193 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); 00194 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); 00195 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); 00196 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); 00197 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); 00198 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); 00199 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); 00200 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); 00201 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); 00202 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); 00203 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); 00204 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); 00205 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); 00206 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); 00207 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); 00208 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); 00209 00210 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); 00211 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); 00212 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); 00213 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); 00214 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); 00215 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); 00216 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); 00217 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); 00218 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); 00219 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); 00220 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); 00221 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); 00222 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); 00223 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); 00224 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); 00225 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); 00226 00227 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); 00228 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); 00229 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); 00230 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); 00231 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); 00232 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); 00233 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); 00234 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); 00235 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); 00236 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); 00237 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); 00238 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); 00239 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); 00240 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); 00241 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); 00242 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); 00243 00244 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); 00245 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); 00246 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); 00247 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); 00248 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); 00249 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); 00250 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); 00251 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); 00252 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); 00253 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); 00254 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); 00255 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); 00256 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); 00257 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); 00258 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); 00259 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); 00260 00261 buf[0] += a; 00262 buf[1] += b; 00263 buf[2] += c; 00264 buf[3] += d; 00265 }
void MD5Update | ( | struct MD5Context * | context, | |
unsigned char const * | buf, | |||
unsigned | len | |||
) |
Definition at line 76 of file md5.c.
References MD5Context::bits, MD5Context::buf, byteReverse(), MD5Context::in, MD5Transform(), and t.
Referenced by ast_md5_hash(), authenticate(), authenticate_verify(), decrypt_frame(), festival_exec(), prov_ver_calc(), register_verify(), try_firmware(), try_load_key(), and verify_key().
00077 { 00078 uint32_t t; 00079 00080 /* Update bitcount */ 00081 00082 t = ctx->bits[0]; 00083 if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) 00084 ctx->bits[1]++; /* Carry from low to high */ 00085 ctx->bits[1] += len >> 29; 00086 00087 t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ 00088 00089 /* Handle any leading odd-sized chunks */ 00090 00091 if (t) { 00092 unsigned char *p = (unsigned char *) ctx->in + t; 00093 00094 t = 64 - t; 00095 if (len < t) { 00096 memcpy(p, buf, len); 00097 return; 00098 } 00099 memcpy(p, buf, t); 00100 byteReverse(ctx->in, 16); 00101 MD5Transform(ctx->buf, (uint32_t *) ctx->in); 00102 buf += t; 00103 len -= t; 00104 } 00105 /* Process data in 64-byte chunks */ 00106 00107 while (len >= 64) { 00108 memcpy(ctx->in, buf, 64); 00109 byteReverse(ctx->in, 16); 00110 MD5Transform(ctx->buf, (uint32_t *) ctx->in); 00111 buf += 64; 00112 len -= 64; 00113 } 00114 00115 /* Handle any remaining bytes of data. */ 00116 00117 memcpy(ctx->in, buf, len); 00118 }