--- /dev/null
+/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm\r
+ */\r
+\r
+/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All\r
+rights reserved.\r
+\r
+License to copy and use this software is granted provided that it\r
+is identified as the "RSA Data Security, Inc. MD5 Message-Digest\r
+Algorithm" in all material mentioning or referencing this software\r
+or this function.\r
+\r
+License is also granted to make and use derivative works provided\r
+that such works are identified as "derived from the RSA Data\r
+Security, Inc. MD5 Message-Digest Algorithm" in all material\r
+mentioning or referencing the derived work.\r
+\r
+RSA Data Security, Inc. makes no representations concerning either\r
+the merchantability of this software or the suitability of this\r
+software for any particular purpose. It is provided "as is"\r
+without express or implied warranty of any kind.\r
+\r
+These notices must be retained in any copies of any part of this\r
+documentation and/or software.\r
+ */\r
+\r
+#include "md5.h"\r
+\r
+/* Constants for MD5Transform routine.\r
+ */\r
+\r
+\r
+#define S11 7\r
+#define S12 12\r
+#define S13 17\r
+#define S14 22\r
+#define S21 5\r
+#define S22 9\r
+#define S23 14\r
+#define S24 20\r
+#define S31 4\r
+#define S32 11\r
+#define S33 16\r
+#define S34 23\r
+#define S41 6\r
+#define S42 10\r
+#define S43 15\r
+#define S44 21\r
+\r
+static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));\r
+static void Encode PROTO_LIST\r
+ ((unsigned char *, UINT4 *, unsigned int));\r
+static void Decode PROTO_LIST\r
+ ((UINT4 *, unsigned char *, unsigned int));\r
+static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));\r
+static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));\r
+\r
+static unsigned char PADDING[64] = {\r
+ 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\r
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\r
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0\r
+};\r
+\r
+/* F, G, H and I are basic MD5 functions.\r
+ */\r
+#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))\r
+#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))\r
+#define H(x, y, z) ((x) ^ (y) ^ (z))\r
+#define I(x, y, z) ((y) ^ ((x) | (~z)))\r
+\r
+/* ROTATE_LEFT rotates x left n bits.\r
+ */\r
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))\r
+\r
+/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.\r
+Rotation is separate from addition to prevent recomputation.\r
+ */\r
+#define FF(a, b, c, d, x, s, ac) { \\r
+ (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \\r
+ (a) = ROTATE_LEFT ((a), (s)); \\r
+ (a) += (b); \\r
+ }\r
+#define GG(a, b, c, d, x, s, ac) { \\r
+ (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \\r
+ (a) = ROTATE_LEFT ((a), (s)); \\r
+ (a) += (b); \\r
+ }\r
+#define HH(a, b, c, d, x, s, ac) { \\r
+ (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \\r
+ (a) = ROTATE_LEFT ((a), (s)); \\r
+ (a) += (b); \\r
+ }\r
+#define II(a, b, c, d, x, s, ac) { \\r
+ (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \\r
+ (a) = ROTATE_LEFT ((a), (s)); \\r
+ (a) += (b); \\r
+ }\r
+\r
+/* MD5 initialization. Begins an MD5 operation, writing a new context.\r
+ */\r
+void MD5Init (context)\r
+MD5_CTX *context; /* context */\r
+{\r
+ context->count[0] = context->count[1] = 0;\r
+ /* Load magic initialization constants.\r
+*/\r
+ context->state[0] = 0x67452301;\r
+ context->state[1] = 0xefcdab89;\r
+ context->state[2] = 0x98badcfe;\r
+ context->state[3] = 0x10325476;\r
+}\r
+\r
+/* MD5 block update operation. Continues an MD5 message-digest\r
+ operation, processing another message block, and updating the\r
+ context.\r
+ */\r
+void MD5Update (context, input, inputLen)\r
+MD5_CTX *context; /* context */\r
+unsigned char *input; /* input block */\r
+unsigned int inputLen; /* length of input block */\r
+{\r
+ unsigned int i, index, partLen;\r
+\r
+ /* Compute number of bytes mod 64 */\r
+ index = (unsigned int)((context->count[0] >> 3) & 0x3F);\r
+\r
+ /* Update number of bits */\r
+ if ((context->count[0] += ((UINT4)inputLen << 3))\r
+ < ((UINT4)inputLen << 3))\r
+ context->count[1]++;\r
+ context->count[1] += ((UINT4)inputLen >> 29);\r
+\r
+ partLen = 64 - index;\r
+\r
+ /* Transform as many times as possible.\r
+*/\r
+ if (inputLen >= partLen) {\r
+ MD5_memcpy\r
+ ((POINTER)&context->buffer[index], (POINTER)input, partLen);\r
+ MD5Transform (context->state, context->buffer);\r
+\r
+ for (i = partLen; i + 63 < inputLen; i += 64)\r
+ MD5Transform (context->state, &input[i]);\r
+\r
+ index = 0;\r
+ }\r
+ else\r
+ i = 0;\r
+\r
+ /* Buffer remaining input */\r
+ MD5_memcpy\r
+ ((POINTER)&context->buffer[index], (POINTER)&input[i],\r
+ inputLen-i);\r
+}\r
+\r
+/* MD5 finalization. Ends an MD5 message-digest operation, writing the\r
+ the message digest and zeroizing the context.\r
+ */\r
+void MD5Final (digest, context)\r
+unsigned char digest[16]; /* message digest */\r
+MD5_CTX *context; /* context */\r
+{\r
+ unsigned char bits[8];\r
+ unsigned int index, padLen;\r
+\r
+ /* Save number of bits */\r
+ Encode (bits, context->count, 8);\r
+\r
+ /* Pad out to 56 mod 64.\r
+*/\r
+ index = (unsigned int)((context->count[0] >> 3) & 0x3f);\r
+ padLen = (index < 56) ? (56 - index) : (120 - index);\r
+ MD5Update (context, PADDING, padLen);\r
+\r
+ /* Append length (before padding) */\r
+ MD5Update (context, bits, 8);\r
+\r
+ /* Store state in digest */\r
+ Encode (digest, context->state, 16);\r
+\r
+ /* Zeroize sensitive information.\r
+*/\r
+ MD5_memset ((POINTER)context, 0, sizeof (*context));\r
+}\r
+\r
+/* MD5 basic transformation. Transforms state based on block.\r
+ */\r
+static void MD5Transform (state, block)\r
+UINT4 state[4];\r
+unsigned char block[64];\r
+{\r
+ UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];\r
+\r
+ Decode (x, block, 64);\r
+\r
+ /* Round 1 */\r
+ FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */\r
+ FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */\r
+ FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */\r
+ FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */\r
+ FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */\r
+ FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */\r
+ FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */\r
+ FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */\r
+ FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */\r
+ FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */\r
+ FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */\r
+ FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */\r
+ FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */\r
+ FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */\r
+ FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */\r
+ FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */\r
+\r
+ /* Round 2 */\r
+ GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */\r
+ GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */\r
+ GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */\r
+ GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */\r
+ GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */\r
+ GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */\r
+ GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */\r
+ GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */\r
+ GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */\r
+ GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */\r
+ GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */\r
+ GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */\r
+ GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */\r
+ GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */\r
+ GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */\r
+ GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */\r
+\r
+ /* Round 3 */\r
+ HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */\r
+ HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */\r
+ HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */\r
+ HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */\r
+ HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */\r
+ HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */\r
+ HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */\r
+ HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */\r
+ HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */\r
+ HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */\r
+ HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */\r
+ HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */\r
+ HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */\r
+ HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */\r
+ HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */\r
+ HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */\r
+\r
+ /* Round 4 */\r
+ II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */\r
+ II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */\r
+ II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */\r
+ II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */\r
+ II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */\r
+ II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */\r
+ II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */\r
+ II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */\r
+ II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */\r
+ II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */\r
+ II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */\r
+ II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */\r
+ II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */\r
+ II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */\r
+ II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */\r
+ II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */\r
+\r
+ state[0] += a;\r
+ state[1] += b;\r
+ state[2] += c;\r
+ state[3] += d;\r
+\r
+ /* Zeroize sensitive information.\r
+*/\r
+ MD5_memset ((POINTER)x, 0, sizeof (x));\r
+}\r
+\r
+/* Encodes input (UINT4) into output (unsigned char). Assumes len is\r
+ a multiple of 4.\r
+ */\r
+static void Encode (output, input, len)\r
+unsigned char *output;\r
+UINT4 *input;\r
+unsigned int len;\r
+{\r
+ unsigned int i, j;\r
+\r
+ for (i = 0, j = 0; j < len; i++, j += 4) {\r
+ output[j] = (unsigned char)(input[i] & 0xff);\r
+ output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);\r
+ output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);\r
+ output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);\r
+ }\r
+}\r
+\r
+/* Decodes input (unsigned char) into output (UINT4). Assumes len is\r
+ a multiple of 4.\r
+ */\r
+static void Decode (output, input, len)\r
+UINT4 *output;\r
+unsigned char *input;\r
+unsigned int len;\r
+{\r
+ unsigned int i, j;\r
+\r
+ for (i = 0, j = 0; j < len; i++, j += 4)\r
+ output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |\r
+ (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);\r
+}\r
+\r
+/* Note: Replace "for loop" with standard memcpy if possible.\r
+ */\r
+\r
+static void MD5_memcpy (output, input, len)\r
+POINTER output;\r
+POINTER input;\r
+unsigned int len;\r
+{\r
+ unsigned int i;\r
+\r
+ for (i = 0; i < len; i++)\r
+ output[i] = input[i];\r
+}\r
+\r
+/* Note: Replace "for loop" with standard memset if possible.\r
+ */\r
+static void MD5_memset (output, value, len)\r
+POINTER output;\r
+int value;\r
+unsigned int len;\r
+{\r
+ unsigned int i;\r
+\r
+ for (i = 0; i < len; i++)\r
+ ((char *)output)[i] = (char)value;\r
+}\r
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