diff options
Diffstat (limited to 'mdk-stage1/dietlibc/libcrypt/md5.c')
| -rw-r--r-- | mdk-stage1/dietlibc/libcrypt/md5.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libcrypt/md5.c b/mdk-stage1/dietlibc/libcrypt/md5.c new file mode 100644 index 000000000..ede9a067e --- /dev/null +++ b/mdk-stage1/dietlibc/libcrypt/md5.c @@ -0,0 +1,243 @@ +/***************************************************************************** +* +* "derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm". +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation; either version 2 of the License, or +* (at your option) any later version. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program; if not, write to the Free Software +* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +* +*****************************************************************************/ + +#include <endian.h> +#include <md5.h> +#include <string.h> + +#if (__BYTE_ORDER == __BIG_ENDIAN) +/* + Block copy and convert byte order to little-endian. + dst must be 32bit aligned. + Length is the number of 32bit words +*/ +static void CopyToLittleEndian (uint32_t *dst, const uint8_t *src, int length) { + while (length--) { + *dst=(((uint32_t)src[3])<<24) | + (((uint32_t)src[2])<<16) | + (((uint32_t)src[1])<< 8) | + (uint32_t)src[0]; + src+=4; + dst++; + } +} +#endif + + +/* + Assembler versions of __MD5Transform, MD5Init and MD5Update + currently exist for x86 and little-endian ARM. + For other targets, we need to use the C versions below. +*/ + +#if !(defined (__i386__) || ((defined (__arm__) && (__BYTE_ORDER == __LITTLE_ENDIAN)))) + +/* + Initialise the MD5 context. +*/ +void MD5Init (MD5_CTX* context) { + context->count[0] = 0; + context->count[1] = 0; + + context->state[0] = 0x67452301; /* Load magic constants. */ + context->state[1] = 0xefcdab89; + context->state[2] = 0x98badcfe; + context->state[3] = 0x10325476; +} + +#define ROTATE_LEFT(x, n) ((x << n) | (x >> (32-n))) + +#define F(x, y, z) (z ^ (x & (y ^ z))) +#define G(x, y, z) (y ^ (z & (x ^ y))) +#define H(x, y, z) (x ^ y ^ z) +#define I(x, y, z) (y ^ (x | ~z)) + +#define FF(a, b, c, d, x, s, ac) { (a) += F (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } +#define GG(a, b, c, d, x, s, ac) { (a) += G (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } +#define HH(a, b, c, d, x, s, ac) { (a) += H (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } +#define II(a, b, c, d, x, s, ac) { (a) += I (b, c, d) + (x) + (uint32_t)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } + +static void __MD5Transform (uint32_t state[4], const uint8_t *in, int repeat) { + const uint32_t *x; + + uint32_t a = state[0]; + uint32_t b = state[1]; + uint32_t c = state[2]; + uint32_t d = state[3]; + + for ( ; repeat; repeat--) { + uint32_t tempBuffer[16]; +#if (__BYTE_ORDER == __BIG_ENDIAN) + + CopyToLittleEndian (tempBuffer, in, 16); + x = tempBuffer; +#else + if ((long)in & 3) { + memcpy(tempBuffer, in, 64); + x = tempBuffer; + } else + x = (const uint32_t *) in; +#endif + + FF (a, b, c, d, x[ 0], 7, 0xd76aa478); /* 1 */ /* Round 1 */ + FF (d, a, b, c, x[ 1], 12, 0xe8c7b756); /* 2 */ + FF (c, d, a, b, x[ 2], 17, 0x242070db); /* 3 */ + FF (b, c, d, a, x[ 3], 22, 0xc1bdceee); /* 4 */ + FF (a, b, c, d, x[ 4], 7, 0xf57c0faf); /* 5 */ + FF (d, a, b, c, x[ 5], 12, 0x4787c62a); /* 6 */ + FF (c, d, a, b, x[ 6], 17, 0xa8304613); /* 7 */ + FF (b, c, d, a, x[ 7], 22, 0xfd469501); /* 8 */ + FF (a, b, c, d, x[ 8], 7, 0x698098d8); /* 9 */ + FF (d, a, b, c, x[ 9], 12, 0x8b44f7af); /* 10 */ + FF (c, d, a, b, x[10], 17, 0xffff5bb1); /* 11 */ + FF (b, c, d, a, x[11], 22, 0x895cd7be); /* 12 */ + FF (a, b, c, d, x[12], 7, 0x6b901122); /* 13 */ + FF (d, a, b, c, x[13], 12, 0xfd987193); /* 14 */ + FF (c, d, a, b, x[14], 17, 0xa679438e); /* 15 */ + FF (b, c, d, a, x[15], 22, 0x49b40821); /* 16 */ + + GG (a, b, c, d, x[ 1], 5, 0xf61e2562); /* 17 */ /* Round 2 */ + GG (d, a, b, c, x[ 6], 9, 0xc040b340); /* 18 */ + GG (c, d, a, b, x[11], 14, 0x265e5a51); /* 19 */ + GG (b, c, d, a, x[ 0], 20, 0xe9b6c7aa); /* 20 */ + GG (a, b, c, d, x[ 5], 5, 0xd62f105d); /* 21 */ + GG (d, a, b, c, x[10], 9, 0x02441453); /* 22 */ + GG (c, d, a, b, x[15], 14, 0xd8a1e681); /* 23 */ + GG (b, c, d, a, x[ 4], 20, 0xe7d3fbc8); /* 24 */ + GG (a, b, c, d, x[ 9], 5, 0x21e1cde6); /* 25 */ + GG (d, a, b, c, x[14], 9, 0xc33707d6); /* 26 */ + GG (c, d, a, b, x[ 3], 14, 0xf4d50d87); /* 27 */ + GG (b, c, d, a, x[ 8], 20, 0x455a14ed); /* 28 */ + GG (a, b, c, d, x[13], 5, 0xa9e3e905); /* 29 */ + GG (d, a, b, c, x[ 2], 9, 0xfcefa3f8); /* 30 */ + GG (c, d, a, b, x[ 7], 14, 0x676f02d9); /* 31 */ + GG (b, c, d, a, x[12], 20, 0x8d2a4c8a); /* 32 */ + + HH (a, b, c, d, x[ 5], 4, 0xfffa3942); /* 33 */ /* Round 3 */ + HH (d, a, b, c, x[ 8], 11, 0x8771f681); /* 34 */ + HH (c, d, a, b, x[11], 16, 0x6d9d6122); /* 35 */ + HH (b, c, d, a, x[14], 23, 0xfde5380c); /* 36 */ + HH (a, b, c, d, x[ 1], 4, 0xa4beea44); /* 37 */ + HH (d, a, b, c, x[ 4], 11, 0x4bdecfa9); /* 38 */ + HH (c, d, a, b, x[ 7], 16, 0xf6bb4b60); /* 39 */ + HH (b, c, d, a, x[10], 23, 0xbebfbc70); /* 40 */ + HH (a, b, c, d, x[13], 4, 0x289b7ec6); /* 41 */ + HH (d, a, b, c, x[ 0], 11, 0xeaa127fa); /* 42 */ + HH (c, d, a, b, x[ 3], 16, 0xd4ef3085); /* 43 */ + HH (b, c, d, a, x[ 6], 23, 0x04881d05); /* 44 */ + HH (a, b, c, d, x[ 9], 4, 0xd9d4d039); /* 45 */ + HH (d, a, b, c, x[12], 11, 0xe6db99e5); /* 46 */ + HH (c, d, a, b, x[15], 16, 0x1fa27cf8); /* 47 */ + HH (b, c, d, a, x[ 2], 23, 0xc4ac5665); /* 48 */ + + II (a, b, c, d, x[ 0], 6, 0xf4292244); /* 49 */ /* Round 4 */ + II (d, a, b, c, x[ 7], 10, 0x432aff97); /* 50 */ + II (c, d, a, b, x[14], 15, 0xab9423a7); /* 51 */ + II (b, c, d, a, x[ 5], 21, 0xfc93a039); /* 52 */ + II (a, b, c, d, x[12], 6, 0x655b59c3); /* 53 */ + II (d, a, b, c, x[ 3], 10, 0x8f0ccc92); /* 54 */ + II (c, d, a, b, x[10], 15, 0xffeff47d); /* 55 */ + II (b, c, d, a, x[ 1], 21, 0x85845dd1); /* 56 */ + II (a, b, c, d, x[ 8], 6, 0x6fa87e4f); /* 57 */ + II (d, a, b, c, x[15], 10, 0xfe2ce6e0); /* 58 */ + II (c, d, a, b, x[ 6], 15, 0xa3014314); /* 59 */ + II (b, c, d, a, x[13], 21, 0x4e0811a1); /* 60 */ + II (a, b, c, d, x[ 4], 6, 0xf7537e82); /* 61 */ + II (d, a, b, c, x[11], 10, 0xbd3af235); /* 62 */ + II (c, d, a, b, x[ 2], 15, 0x2ad7d2bb); /* 63 */ + II (b, c, d, a, x[ 9], 21, 0xeb86d391); /* 64 */ + + state[0] = a = a + state[0]; + state[1] = b = b + state[1]; + state[2] = c = c + state[2]; + state[3] = d = d + state[3]; + + in += 64; + } +} + + +/* + MD5 block update operation: + Process another sub-string of the message and update the context. +*/ +void MD5Update (MD5_CTX *context, const uint8_t *input, size_t inputBytes) { + int i; + int byteIndex; + unsigned int partLen; + int len; + + /* Compute number of bytes mod 64 */ + byteIndex = (context->count[0] >> 3) & 0x3F; + + /* Update number of bits: count += 8 * inputBytes */ + if ((context->count[0] += inputBytes << 3) < (inputBytes << 3)) + context->count[1]++; + context->count[1] += (inputBytes >> (32-3)); + + partLen = (64 - byteIndex); + + /* Transform as many times as possible. */ + if (inputBytes >= partLen) { + memcpy (context->buffer + byteIndex, input, partLen); + __MD5Transform (context->state, (const uint8_t *) context->buffer, 1); + len = (inputBytes - partLen) / 64; + __MD5Transform (context->state, &input[partLen], len); + i = partLen + 64 * len; + byteIndex = 0; + } else + i = 0; + + /* Buffer remaining input */ + memcpy (&context->buffer[byteIndex], &input[i], inputBytes - i); +} + +#endif + + +void MD5Final (uint8_t digest[16], MD5_CTX* context) { + static uint8_t finalBlock[64]; + + uint32_t bits[2]; + int byteIndex; + int finalBlockLength; + + byteIndex = (context->count[0] >> 3) & 0x3F; + finalBlockLength = ((byteIndex < 56) ? 56 : 120) - byteIndex; + finalBlock[0] = 0x80; + +#if (__BYTE_ORDER == __BIG_ENDIAN) + CopyToLittleEndian (bits, (const uint8_t *) context->count, 2); +#else + memcpy(bits, context->count, 8); +#endif + + MD5Update (context, finalBlock, finalBlockLength); + MD5Update (context, (const uint8_t *) bits, 8); + +#if (__BYTE_ORDER == __BIG_ENDIAN) + CopyToLittleEndian ((uint32_t *) digest, (const uint8_t *) context->state, 4); +#else + memcpy (digest, context->state, 16); +#endif + + memset(context, 0, sizeof(*context)); +} + |