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1.1 ! misho 1: /* ! 2: * This file was transplanted with slight modifications from Linux sources ! 3: * (fs/cifs/md5.c) into U-Boot by Bartlomiej Sieka <tur@semihalf.com>. ! 4: */ ! 5: ! 6: /* ! 7: * This code implements the MD5 message-digest algorithm. ! 8: * The algorithm is due to Ron Rivest. This code was ! 9: * written by Colin Plumb in 1993, no copyright is claimed. ! 10: * This code is in the public domain; do with it what you wish. ! 11: * ! 12: * Equivalent code is available from RSA Data Security, Inc. ! 13: * This code has been tested against that, and is equivalent, ! 14: * except that you don't need to include two pages of legalese ! 15: * with every copy. ! 16: * ! 17: * To compute the message digest of a chunk of bytes, declare an ! 18: * MD5Context structure, pass it to MD5Init, call MD5Update as ! 19: * needed on buffers full of bytes, and then call MD5Final, which ! 20: * will fill a supplied 16-byte array with the digest. ! 21: */ ! 22: ! 23: /* This code slightly modified to fit into Samba by ! 24: abartlet@samba.org Jun 2001 ! 25: and to fit the cifs vfs by ! 26: Steve French sfrench@us.ibm.com */ ! 27: ! 28: #include "compiler.h" ! 29: ! 30: #ifndef USE_HOSTCC ! 31: #include <common.h> ! 32: #include <watchdog.h> ! 33: #endif /* USE_HOSTCC */ ! 34: #include <u-boot/md5.h> ! 35: ! 36: static void ! 37: MD5Transform(__u32 buf[4], __u32 const in[16]); ! 38: ! 39: /* ! 40: * Note: this code is harmless on little-endian machines. ! 41: */ ! 42: static void ! 43: byteReverse(unsigned char *buf, unsigned longs) ! 44: { ! 45: __u32 t; ! 46: do { ! 47: t = (__u32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | ! 48: ((unsigned) buf[1] << 8 | buf[0]); ! 49: *(__u32 *) buf = t; ! 50: buf += 4; ! 51: } while (--longs); ! 52: } ! 53: ! 54: /* ! 55: * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious ! 56: * initialization constants. ! 57: */ ! 58: static void ! 59: MD5Init(struct MD5Context *ctx) ! 60: { ! 61: ctx->buf[0] = 0x67452301; ! 62: ctx->buf[1] = 0xefcdab89; ! 63: ctx->buf[2] = 0x98badcfe; ! 64: ctx->buf[3] = 0x10325476; ! 65: ! 66: ctx->bits[0] = 0; ! 67: ctx->bits[1] = 0; ! 68: } ! 69: ! 70: /* ! 71: * Update context to reflect the concatenation of another buffer full ! 72: * of bytes. ! 73: */ ! 74: static void ! 75: MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len) ! 76: { ! 77: register __u32 t; ! 78: ! 79: /* Update bitcount */ ! 80: ! 81: t = ctx->bits[0]; ! 82: if ((ctx->bits[0] = t + ((__u32) len << 3)) < t) ! 83: ctx->bits[1]++; /* Carry from low to high */ ! 84: ctx->bits[1] += len >> 29; ! 85: ! 86: t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ ! 87: ! 88: /* Handle any leading odd-sized chunks */ ! 89: ! 90: if (t) { ! 91: unsigned char *p = (unsigned char *) ctx->in + t; ! 92: ! 93: t = 64 - t; ! 94: if (len < t) { ! 95: memmove(p, buf, len); ! 96: return; ! 97: } ! 98: memmove(p, buf, t); ! 99: byteReverse(ctx->in, 16); ! 100: MD5Transform(ctx->buf, (__u32 *) ctx->in); ! 101: buf += t; ! 102: len -= t; ! 103: } ! 104: /* Process data in 64-byte chunks */ ! 105: ! 106: while (len >= 64) { ! 107: memmove(ctx->in, buf, 64); ! 108: byteReverse(ctx->in, 16); ! 109: MD5Transform(ctx->buf, (__u32 *) ctx->in); ! 110: buf += 64; ! 111: len -= 64; ! 112: } ! 113: ! 114: /* Handle any remaining bytes of data. */ ! 115: ! 116: memmove(ctx->in, buf, len); ! 117: } ! 118: ! 119: /* ! 120: * Final wrapup - pad to 64-byte boundary with the bit pattern ! 121: * 1 0* (64-bit count of bits processed, MSB-first) ! 122: */ ! 123: static void ! 124: MD5Final(unsigned char digest[16], struct MD5Context *ctx) ! 125: { ! 126: unsigned int count; ! 127: unsigned char *p; ! 128: ! 129: /* Compute number of bytes mod 64 */ ! 130: count = (ctx->bits[0] >> 3) & 0x3F; ! 131: ! 132: /* Set the first char of padding to 0x80. This is safe since there is ! 133: always at least one byte free */ ! 134: p = ctx->in + count; ! 135: *p++ = 0x80; ! 136: ! 137: /* Bytes of padding needed to make 64 bytes */ ! 138: count = 64 - 1 - count; ! 139: ! 140: /* Pad out to 56 mod 64 */ ! 141: if (count < 8) { ! 142: /* Two lots of padding: Pad the first block to 64 bytes */ ! 143: memset(p, 0, count); ! 144: byteReverse(ctx->in, 16); ! 145: MD5Transform(ctx->buf, (__u32 *) ctx->in); ! 146: ! 147: /* Now fill the next block with 56 bytes */ ! 148: memset(ctx->in, 0, 56); ! 149: } else { ! 150: /* Pad block to 56 bytes */ ! 151: memset(p, 0, count - 8); ! 152: } ! 153: byteReverse(ctx->in, 14); ! 154: ! 155: /* Append length in bits and transform */ ! 156: ((__u32 *) ctx->in)[14] = ctx->bits[0]; ! 157: ((__u32 *) ctx->in)[15] = ctx->bits[1]; ! 158: ! 159: MD5Transform(ctx->buf, (__u32 *) ctx->in); ! 160: byteReverse((unsigned char *) ctx->buf, 4); ! 161: memmove(digest, ctx->buf, 16); ! 162: memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */ ! 163: } ! 164: ! 165: /* The four core functions - F1 is optimized somewhat */ ! 166: ! 167: /* #define F1(x, y, z) (x & y | ~x & z) */ ! 168: #define F1(x, y, z) (z ^ (x & (y ^ z))) ! 169: #define F2(x, y, z) F1(z, x, y) ! 170: #define F3(x, y, z) (x ^ y ^ z) ! 171: #define F4(x, y, z) (y ^ (x | ~z)) ! 172: ! 173: /* This is the central step in the MD5 algorithm. */ ! 174: #define MD5STEP(f, w, x, y, z, data, s) \ ! 175: ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) ! 176: ! 177: /* ! 178: * The core of the MD5 algorithm, this alters an existing MD5 hash to ! 179: * reflect the addition of 16 longwords of new data. MD5Update blocks ! 180: * the data and converts bytes into longwords for this routine. ! 181: */ ! 182: static void ! 183: MD5Transform(__u32 buf[4], __u32 const in[16]) ! 184: { ! 185: register __u32 a, b, c, d; ! 186: ! 187: a = buf[0]; ! 188: b = buf[1]; ! 189: c = buf[2]; ! 190: d = buf[3]; ! 191: ! 192: MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); ! 193: MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); ! 194: MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); ! 195: MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); ! 196: MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); ! 197: MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); ! 198: MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); ! 199: MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); ! 200: MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); ! 201: MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); ! 202: MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); ! 203: MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); ! 204: MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); ! 205: MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); ! 206: MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); ! 207: MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); ! 208: ! 209: MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); ! 210: MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); ! 211: MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); ! 212: MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); ! 213: MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); ! 214: MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); ! 215: MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); ! 216: MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); ! 217: MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); ! 218: MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); ! 219: MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); ! 220: MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); ! 221: MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); ! 222: MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); ! 223: MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); ! 224: MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); ! 225: ! 226: MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); ! 227: MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); ! 228: MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); ! 229: MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); ! 230: MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); ! 231: MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); ! 232: MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); ! 233: MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); ! 234: MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); ! 235: MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); ! 236: MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); ! 237: MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); ! 238: MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); ! 239: MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); ! 240: MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); ! 241: MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); ! 242: ! 243: MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); ! 244: MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); ! 245: MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); ! 246: MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); ! 247: MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); ! 248: MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); ! 249: MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); ! 250: MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); ! 251: MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); ! 252: MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); ! 253: MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); ! 254: MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); ! 255: MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); ! 256: MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); ! 257: MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); ! 258: MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); ! 259: ! 260: buf[0] += a; ! 261: buf[1] += b; ! 262: buf[2] += c; ! 263: buf[3] += d; ! 264: } ! 265: ! 266: /* ! 267: * Calculate and store in 'output' the MD5 digest of 'len' bytes at ! 268: * 'input'. 'output' must have enough space to hold 16 bytes. ! 269: */ ! 270: void ! 271: md5 (unsigned char *input, int len, unsigned char output[16]) ! 272: { ! 273: struct MD5Context context; ! 274: ! 275: MD5Init(&context); ! 276: MD5Update(&context, input, len); ! 277: MD5Final(output, &context); ! 278: } ! 279: ! 280: ! 281: /* ! 282: * Calculate and store in 'output' the MD5 digest of 'len' bytes at 'input'. ! 283: * 'output' must have enough space to hold 16 bytes. If 'chunk' Trigger the ! 284: * watchdog every 'chunk_sz' bytes of input processed. ! 285: */ ! 286: void ! 287: md5_wd (unsigned char *input, int len, unsigned char output[16], ! 288: unsigned int chunk_sz) ! 289: { ! 290: struct MD5Context context; ! 291: #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) ! 292: unsigned char *end, *curr; ! 293: int chunk; ! 294: #endif ! 295: ! 296: MD5Init(&context); ! 297: ! 298: #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) ! 299: curr = input; ! 300: end = input + len; ! 301: while (curr < end) { ! 302: chunk = end - curr; ! 303: if (chunk > chunk_sz) ! 304: chunk = chunk_sz; ! 305: MD5Update(&context, curr, chunk); ! 306: curr += chunk; ! 307: WATCHDOG_RESET (); ! 308: } ! 309: #else ! 310: MD5Update(&context, input, len); ! 311: #endif ! 312: ! 313: MD5Final(output, &context); ! 314: }