sl@0: /*
sl@0:  * © Portions copyright (c) 2005-2006 Nokia Corporation.
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
sl@0:  *
sl@0:  * Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
sl@0:  * rights reserved.
sl@0:  *
sl@0:  * License to copy and use this software is granted provided that it
sl@0:  * is identified as the "RSA Data Security, Inc. MD5 Message-Digest
sl@0:  * Algorithm" in all material mentioning or referencing this software
sl@0:  * or this function.
sl@0:  *
sl@0:  * License is also granted to make and use derivative works provided
sl@0:  * that such works are identified as "derived from the RSA Data
sl@0:  * Security, Inc. MD5 Message-Digest Algorithm" in all material
sl@0:  * mentioning or referencing the derived work.
sl@0:  *
sl@0:  * RSA Data Security, Inc. makes no representations concerning either
sl@0:  * the merchantability of this software or the suitability of this
sl@0:  * software for any particular purpose. It is provided "as is"
sl@0:  * without express or implied warranty of any kind.
sl@0:  *
sl@0:  * These notices must be retained in any copies of any part of this
sl@0:  * documentation and/or software.
sl@0:  *
sl@0:  * This code is the same as the code published by RSA Inc.  It has been
sl@0:  * edited for clarity and style only.
sl@0:  */
sl@0: 
sl@0: #ifndef EMULATOR 
sl@0: #define EMULATOR ((defined(__WINS__) || defined(__WINSCW__)))
sl@0: #endif
sl@0: 
sl@0: #ifdef SYMBIAN
sl@0: #include <sys/types.h>
sl@0: #include <string.h>
sl@0: #include <arpa/inet.h>
sl@0: #include <sys/md5.h>
sl@0: 
sl@0: #else
sl@0: 
sl@0: #include <sys/cdefs.h>
sl@0: __FBSDID("$FreeBSD: src/lib/libmd/md5c.c,v 1.16 2003/06/05 13:17:32 markm Exp $");
sl@0: 
sl@0: #include <sys/types.h>
sl@0: 
sl@0: #ifdef _KERNEL
sl@0: #include <sys/systm.h>
sl@0: #else
sl@0: #include <string.h>
sl@0: #endif
sl@0: 
sl@0: #include <machine/endian.h>
sl@0: #include <sys/endian.h>
sl@0: #include <sys/md5.h>
sl@0: 
sl@0: #endif /* end ifdef SYMBIAN */
sl@0: 
sl@0: static void MD5Transform(u_int32_t [4], const unsigned char [64]);
sl@0: 
sl@0: #ifndef SYMBIAN
sl@0: 
sl@0: #ifdef _KERNEL
sl@0: #define memset(x,y,z)	bzero(x,z);
sl@0: #define memcpy(x,y,z)	bcopy(y, x, z)
sl@0: #endif
sl@0: 
sl@0: #endif /* end ifndef SYMBIAN */
sl@0: 
sl@0: #ifdef SYMBIAN
sl@0: 
sl@0: /* Since EPOC32 is little-endian, Encode and Decode are defined to be
sl@0:  * memcpy()
sl@0:  */
sl@0: #define Encode memcpy
sl@0: #define Decode memcpy
sl@0: #else
sl@0: 
sl@0: #if (BYTE_ORDER == LITTLE_ENDIAN)
sl@0: #define Encode memcpy
sl@0: #define Decode memcpy
sl@0: #else 
sl@0: 
sl@0: /*
sl@0:  * Encodes input (u_int32_t) into output (unsigned char). Assumes len is
sl@0:  * a multiple of 4.
sl@0:  */
sl@0: 
sl@0: static void
sl@0: Encode (unsigned char *output, u_int32_t *input, unsigned int len)
sl@0: {
sl@0: 	unsigned int i;
sl@0: 	u_int32_t *op = (u_int32_t *)output;
sl@0: 
sl@0: 	for (i = 0; i < len / 4; i++)
sl@0: 		op[i] = htole32(input[i]);
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * Decodes input (unsigned char) into output (u_int32_t). Assumes len is
sl@0:  * a multiple of 4.
sl@0:  */
sl@0: 
sl@0: static void
sl@0: Decode (u_int32_t *output, const unsigned char *input, unsigned int len)
sl@0: {
sl@0: 	unsigned int i;
sl@0: 	const u_int32_t *ip = (const u_int32_t *)input;
sl@0: 
sl@0: 	for (i = 0; i < len / 4; i++)
sl@0: 		output[i] = le32toh(ip[i]);
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #endif /* ifdef SYMBIAN */
sl@0: 
sl@0: #if !EMULATOR
sl@0: static unsigned char PADDING[64] = {
sl@0:   0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
sl@0:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
sl@0:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
sl@0: };
sl@0: #else
sl@0: const unsigned char PADDING[64] = {
sl@0:   0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
sl@0:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
sl@0:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
sl@0: };
sl@0: #endif
sl@0: 
sl@0: /* F, G, H and I are basic MD5 functions. */
sl@0: #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
sl@0: #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
sl@0: #define H(x, y, z) ((x) ^ (y) ^ (z))
sl@0: #define I(x, y, z) ((y) ^ ((x) | (~z)))
sl@0: 
sl@0: /* ROTATE_LEFT rotates x left n bits. */
sl@0: #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
sl@0: 
sl@0: /*
sl@0:  * FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
sl@0:  * Rotation is separate from addition to prevent recomputation.
sl@0:  */
sl@0: #define FF(a, b, c, d, x, s, ac) { \
sl@0: 	(a) += F ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
sl@0: 	(a) = ROTATE_LEFT ((a), (s)); \
sl@0: 	(a) += (b); \
sl@0: 	}
sl@0: #define GG(a, b, c, d, x, s, ac) { \
sl@0: 	(a) += G ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
sl@0: 	(a) = ROTATE_LEFT ((a), (s)); \
sl@0: 	(a) += (b); \
sl@0: 	}
sl@0: #define HH(a, b, c, d, x, s, ac) { \
sl@0: 	(a) += H ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
sl@0: 	(a) = ROTATE_LEFT ((a), (s)); \
sl@0: 	(a) += (b); \
sl@0: 	}
sl@0: #define II(a, b, c, d, x, s, ac) { \
sl@0: 	(a) += I ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
sl@0: 	(a) = ROTATE_LEFT ((a), (s)); \
sl@0: 	(a) += (b); \
sl@0: 	}
sl@0: 
sl@0: /* MD5 initialization. Begins an MD5 operation, writing a new context. */
sl@0: #ifdef SYMBIAN
sl@0: void MD5Init (MD5_CTX *context)
sl@0: {
sl@0: #else
sl@0: void
sl@0: MD5Init (context)
sl@0: 	MD5_CTX *context;
sl@0: {
sl@0: #endif
sl@0: 
sl@0: 	context->count[0] = context->count[1] = 0;
sl@0: 
sl@0: 	/* Load magic initialization constants.  */
sl@0: 	context->state[0] = 0x67452301;
sl@0: 	context->state[1] = 0xefcdab89;
sl@0: 	context->state[2] = 0x98badcfe;
sl@0: 	context->state[3] = 0x10325476;
sl@0: }
sl@0: 
sl@0: /* 
sl@0:  * MD5 block update operation. Continues an MD5 message-digest
sl@0:  * operation, processing another message block, and updating the
sl@0:  * context.
sl@0:  */
sl@0: #ifdef SYMBIAN
sl@0: void MD5Update(MD5_CTX *context, const unsigned char *input, unsigned int inputLen)
sl@0: {
sl@0: #else
sl@0: void
sl@0: MD5Update (context, input, inputLen)
sl@0: 	MD5_CTX *context;
sl@0: 	const unsigned char *input;
sl@0: 	unsigned int inputLen;
sl@0: {
sl@0: #endif
sl@0: 	unsigned int i, idx, partLen;
sl@0: 
sl@0: 	/* Compute number of bytes mod 64 */
sl@0: 	idx = (unsigned int)((context->count[0] >> 3) & 0x3F);
sl@0: 
sl@0: 	/* Update number of bits */
sl@0: 	if ((context->count[0] += ((u_int32_t)inputLen << 3))
sl@0: 	    < ((u_int32_t)inputLen << 3))
sl@0: 		context->count[1]++;
sl@0: 	context->count[1] += ((u_int32_t)inputLen >> 29);
sl@0: 
sl@0: 	partLen = 64 - idx;
sl@0: 
sl@0: 	/* Transform as many times as possible. */
sl@0: 	if (inputLen >= partLen) {
sl@0: 		memcpy((void *)&context->buffer[idx], (const void *)input,
sl@0: 		    partLen);
sl@0: 		MD5Transform (context->state, context->buffer);
sl@0: 
sl@0: 		for (i = partLen; i + 63 < inputLen; i += 64)
sl@0: 			MD5Transform (context->state, &input[i]);
sl@0: 
sl@0: 		idx = 0;
sl@0: 	}
sl@0: 	else
sl@0: 		i = 0;
sl@0: 
sl@0: 	/* Buffer remaining input */
sl@0: 	memcpy ((void *)&context->buffer[idx], (const void *)&input[i],
sl@0: 	    inputLen-i);
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * MD5 padding. Adds padding followed by original length.
sl@0:  */
sl@0: 
sl@0: #ifdef SYMBIAN
sl@0: void MD5Pad (MD5_CTX *context)
sl@0: {
sl@0: #else
sl@0: void
sl@0: MD5Pad (context)
sl@0: 	MD5_CTX *context;
sl@0: {
sl@0: #endif
sl@0: 
sl@0: 	unsigned char bits[8];
sl@0: 	unsigned int idx, padLen;
sl@0: 
sl@0: 	/* Save number of bits */
sl@0: 	Encode (bits, context->count, 8);
sl@0: 
sl@0: 	/* Pad out to 56 mod 64. */
sl@0: 	idx = (unsigned int)((context->count[0] >> 3) & 0x3f);
sl@0: 	padLen = (idx < 56) ? (56 - idx) : (120 - idx);
sl@0: 	MD5Update (context, PADDING, padLen);
sl@0: 
sl@0: 	/* Append length (before padding) */
sl@0: 	MD5Update (context, bits, 8);
sl@0: }
sl@0: 
sl@0: /*
sl@0:  * MD5 finalization. Ends an MD5 message-digest operation, writing the
sl@0:  * the message digest and zeroizing the context.
sl@0:  */
sl@0: #ifdef SYMBIAN
sl@0: void MD5Final (unsigned char digest[16], MD5_CTX *context)
sl@0: {
sl@0: #else
sl@0: void
sl@0: MD5Final (digest, context)
sl@0: 	unsigned char digest[16];
sl@0: 	MD5_CTX *context;
sl@0: {
sl@0: #endif
sl@0: 	/* Do padding. */
sl@0: 	MD5Pad (context);
sl@0: 
sl@0: 	/* Store state in digest */
sl@0: 	Encode (digest, context->state, 16);
sl@0: 
sl@0: 	/* Zeroize sensitive information. */
sl@0: 	memset ((void *)context, 0, sizeof (*context));
sl@0: }
sl@0: 
sl@0: /* MD5 basic transformation. Transforms state based on block. */
sl@0: 
sl@0: #ifdef SYMBIAN
sl@0: static void MD5Transform ( u_int32_t state[4], const unsigned char block[64])
sl@0: {
sl@0: #else
sl@0: static void
sl@0: MD5Transform (state, block)
sl@0: 	u_int32_t state[4];
sl@0: 	const unsigned char block[64];
sl@0: {
sl@0: #endif
sl@0: 	u_int32_t a = state[0], b = state[1], c = state[2], d = state[3], x[16];
sl@0: 
sl@0: 	Decode (x, block, 64);
sl@0: 
sl@0: 	/* Round 1 */
sl@0: #define S11 7
sl@0: #define S12 12
sl@0: #define S13 17
sl@0: #define S14 22
sl@0: 	FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
sl@0: 	FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
sl@0: 	FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
sl@0: 	FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
sl@0: 	FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
sl@0: 	FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
sl@0: 	FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
sl@0: 	FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
sl@0: 	FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
sl@0: 	FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
sl@0: 	FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
sl@0: 	FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
sl@0: 	FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
sl@0: 	FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
sl@0: 	FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
sl@0: 	FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
sl@0: 
sl@0: 	/* Round 2 */
sl@0: #define S21 5
sl@0: #define S22 9
sl@0: #define S23 14
sl@0: #define S24 20
sl@0: 	GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
sl@0: 	GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
sl@0: 	GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
sl@0: 	GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
sl@0: 	GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
sl@0: 	GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
sl@0: 	GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
sl@0: 	GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
sl@0: 	GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
sl@0: 	GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
sl@0: 	GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
sl@0: 	GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
sl@0: 	GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
sl@0: 	GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
sl@0: 	GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
sl@0: 	GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
sl@0: 
sl@0: 	/* Round 3 */
sl@0: #define S31 4
sl@0: #define S32 11
sl@0: #define S33 16
sl@0: #define S34 23
sl@0: 	HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
sl@0: 	HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
sl@0: 	HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
sl@0: 	HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
sl@0: 	HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
sl@0: 	HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
sl@0: 	HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
sl@0: 	HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
sl@0: 	HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
sl@0: 	HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
sl@0: 	HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
sl@0: 	HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
sl@0: 	HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
sl@0: 	HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
sl@0: 	HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
sl@0: 	HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
sl@0: 
sl@0: 	/* Round 4 */
sl@0: #define S41 6
sl@0: #define S42 10
sl@0: #define S43 15
sl@0: #define S44 21
sl@0: 	II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
sl@0: 	II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
sl@0: 	II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
sl@0: 	II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
sl@0: 	II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
sl@0: 	II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
sl@0: 	II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
sl@0: 	II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
sl@0: 	II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
sl@0: 	II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
sl@0: 	II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
sl@0: 	II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
sl@0: 	II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
sl@0: 	II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
sl@0: 	II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
sl@0: 	II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
sl@0: 
sl@0: 	state[0] += a;
sl@0: 	state[1] += b;
sl@0: 	state[2] += c;
sl@0: 	state[3] += d;
sl@0: 
sl@0: 	/* Zeroize sensitive information. */
sl@0: 	memset ((void *)x, 0, sizeof (x));
sl@0: }