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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-31 14:36:00 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-31 14:36:00 +0000 |
commit | 608e5adab4915ada5c2881d66d20e3d6fa0efba5 (patch) | |
tree | bbc2662360f180653bb42c54b921dec07135b648 /apps/netutils/codecs/md5.c | |
parent | 120fc05c1d11406857c6d245abe9a344dcaae268 (diff) | |
download | nuttx-608e5adab4915ada5c2881d66d20e3d6fa0efba5.tar.gz nuttx-608e5adab4915ada5c2881d66d20e3d6fa0efba5.tar.bz2 nuttx-608e5adab4915ada5c2881d66d20e3d6fa0efba5.zip |
Add apps/netutils/codecs and associated NSH commands from Darcy Gong
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5280 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'apps/netutils/codecs/md5.c')
-rw-r--r-- | apps/netutils/codecs/md5.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/apps/netutils/codecs/md5.c b/apps/netutils/codecs/md5.c new file mode 100644 index 000000000..da25d14b1 --- /dev/null +++ b/apps/netutils/codecs/md5.c @@ -0,0 +1,402 @@ +/**************************************************************************** + * apps/include/netutils/base64.h + * + * This file is part of the NuttX RTOS: + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Darcy Gong + * + * Reference: + * + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + * + * See README and COPYING for more details. + * + * And is re-released under the NuttX modified BSD license: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <string.h> +#include <stdint.h> + +#include <apps/netutils/md5.h> + +#ifdef CONFIG_CODECS_HASH_MD5 + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +# define F1(x, y, z) (z ^ (x & (y ^ z))) +# define F2(x, y, z) F1(z, x, y) +# define F3(x, y, z) (x ^ y ^ z) +# define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +# define MD5STEP(f, w, x, y, z, data, s) \ + ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: byteReverse + ****************************************************************************/ + +#ifndef CONFIG_ENDIAN_BIG +# define byteReverse(buf, len) +#else +static void byteReverse(unsigned char *buf, unsigned longs) +{ + uint32_t t; + do + { + t = ((uint32_t)buf[3] << 8) | + ((uint32_t)buf[2]) << 16) | + ((uint32_t)buf[1] << 8) | + (uint32_t)buf[0]; + + *(uint32_t*)buf = t; + buf += 4; + } + while (--longs); +} +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: MD5Init + * + * Description: + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + * + ****************************************************************************/ + +void MD5Init(struct MD5Context *ctx) +{ + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +/**************************************************************************** + * Name: MD5Update + * + * Description: + * Update context to reflect the concatenation of another buffer full + * of bytes. + * + ****************************************************************************/ + +void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len) +{ + uint32_t t; + + /* Update bitcount */ + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) + { + /* Carry from low to high */ + + ctx->bits[1]++; + } + + ctx->bits[1] += len >> 29; + + /* Bytes already in shsInfo->data */ + + t = (t >> 3) & 0x3f; + + /* Handle any leading odd-sized chunks */ + + if (t) + { + unsigned char *p = (unsigned char *)ctx->in + t; + + t = 64 - t; + if (len < t) + { + memcpy(p, buf, len); + return; + } + + memcpy(p, buf, t); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + buf += t; + len -= t; + } + + /* Process data in 64-byte chunks */ + + while (len >= 64) + { + memcpy(ctx->in, buf, 64); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + buf += 64; + len -= 64; + } + + /* Handle any remaining bytes of data. */ + + memcpy(ctx->in, buf, len); +} + +/**************************************************************************** + * Name: MD5Final + * + * Description: + * Final wrapup - pad to 64-byte boundary with the bit pattern + * 1 0* (64-bit count of bits processed, MSB-first) + * + ****************************************************************************/ + +void MD5Final(unsigned char digest[16], struct MD5Context *ctx) +{ + unsigned count; + unsigned char *p; + + /* Compute number of bytes mod 64 */ + + count = (ctx->bits[0] >> 3) & 0x3f; + + /* Set the first char of padding to 0x80. This is safe since there is + * always at least one byte free. + */ + + p = ctx->in + count; + *p++ = 0x80; + + /* Bytes of padding needed to make 64 bytes */ + + count = 64 - 1 - count; + + /* Pad out to 56 mod 64 */ + + if (count < 8) + { + /* Two lots of padding: Pad the first block to 64 bytes */ + + memset(p, 0, count); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + + /* Now fill the next block with 56 bytes */ + + memset(ctx->in, 0, 56); + } + else + { + /* Pad block to 56 bytes */ + + memset(p, 0, count - 8); + } + + byteReverse(ctx->in, 14); + + /* Append length in bits and transform */ + + ((uint32_t *)ctx->in)[14] = ctx->bits[0]; + ((uint32_t *)ctx->in)[15] = ctx->bits[1]; + + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + byteReverse((unsigned char *)ctx->buf, 4); + memcpy(digest, ctx->buf, 16); + memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */ +} + +/**************************************************************************** + * Name: MD5Transform + * + * Description: + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + * + ****************************************************************************/ + +void MD5Transform(uint32_t buf[4], uint32_t const in[16]) +{ + register uint32_t a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +/**************************************************************************** + * Name: md5_sum + * + * Description: + * MD5 hash for a data block + * + * Input Parameters: + * addr: Pointers to the data area + * len: Lengths of the data block + * mac: Buffer for the hash + * + ****************************************************************************/ + +void md5_sum(const uint8_t * addr, const size_t len, uint8_t * mac) +{ + MD5_CTX ctx; + + MD5Init(&ctx); + MD5Update(&ctx, addr, len); + MD5Final(mac, &ctx); +} + +/**************************************************************************** + * Name: md5_hash + ****************************************************************************/ + +char *md5_hash(const uint8_t * addr, const size_t len) +{ + uint8_t digest[16]; + char *hash; + int i; + + hash = malloc(33); + md5_sum(addr, len, digest); + for (i = 0; i < 16; i++) + { + vsprintf(&hash[i * 2], "%.2x", digest[i]); + } + + hash[32] = 0; + return hash; +} + +#endif /* CONFIG_CODECS_HASH_MD5 */ |