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Diffstat (limited to 'gpxe/src/crypto/md5.c')
| -rw-r--r-- | gpxe/src/crypto/md5.c | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/gpxe/src/crypto/md5.c b/gpxe/src/crypto/md5.c deleted file mode 100644 index 8c606398..00000000 --- a/gpxe/src/crypto/md5.c +++ /dev/null @@ -1,234 +0,0 @@ -/* - * Cryptographic API. - * - * MD5 Message Digest Algorithm (RFC1321). - * - * Derived from cryptoapi implementation, originally based on the - * public domain implementation written by Colin Plumb in 1993. - * - * Reduced object size by around 50% compared to the original Linux - * version for use in Etherboot by Michael Brown. - * - * Copyright (c) Cryptoapi developers. - * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> - * Copyright (c) 2006 Michael Brown <mbrown@fensystems.co.uk> - * - * 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. - * - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <stdint.h> -#include <string.h> -#include <byteswap.h> -#include <gpxe/crypto.h> -#include <gpxe/md5.h> - -struct md5_step { - u32 ( * f ) ( u32 b, u32 c, u32 d ); - u8 coefficient; - u8 constant; -}; - -static u32 f1(u32 b, u32 c, u32 d) -{ - return ( d ^ ( b & ( c ^ d ) ) ); -} - -static u32 f2(u32 b, u32 c, u32 d) -{ - return ( c ^ ( d & ( b ^ c ) ) ); -} - -static u32 f3(u32 b, u32 c, u32 d) -{ - return ( b ^ c ^ d ); -} - -static u32 f4(u32 b, u32 c, u32 d) -{ - return ( c ^ ( b | ~d ) ); -} - -static struct md5_step md5_steps[4] = { - { - .f = f1, - .coefficient = 1, - .constant = 0, - }, - { - .f = f2, - .coefficient = 5, - .constant = 1, - }, - { - .f = f3, - .coefficient = 3, - .constant = 5, - }, - { - .f = f4, - .coefficient = 7, - .constant = 0, - } -}; - -static const u8 r[64] = { - 7,12,17,22,7,12,17,22,7,12,17,22,7,12,17,22, - 5,9,14,20,5,9,14,20,5,9,14,20,5,9,14,20, - 4,11,16,23,4,11,16,23,4,11,16,23,4,11,16,23, - 6,10,15,21,6,10,15,21,6,10,15,21,6,10,15,21 -}; - -static const u32 k[64] = { - 0xd76aa478UL, 0xe8c7b756UL, 0x242070dbUL, 0xc1bdceeeUL, - 0xf57c0fafUL, 0x4787c62aUL, 0xa8304613UL, 0xfd469501UL, - 0x698098d8UL, 0x8b44f7afUL, 0xffff5bb1UL, 0x895cd7beUL, - 0x6b901122UL, 0xfd987193UL, 0xa679438eUL, 0x49b40821UL, - 0xf61e2562UL, 0xc040b340UL, 0x265e5a51UL, 0xe9b6c7aaUL, - 0xd62f105dUL, 0x02441453UL, 0xd8a1e681UL, 0xe7d3fbc8UL, - 0x21e1cde6UL, 0xc33707d6UL, 0xf4d50d87UL, 0x455a14edUL, - 0xa9e3e905UL, 0xfcefa3f8UL, 0x676f02d9UL, 0x8d2a4c8aUL, - 0xfffa3942UL, 0x8771f681UL, 0x6d9d6122UL, 0xfde5380cUL, - 0xa4beea44UL, 0x4bdecfa9UL, 0xf6bb4b60UL, 0xbebfbc70UL, - 0x289b7ec6UL, 0xeaa127faUL, 0xd4ef3085UL, 0x04881d05UL, - 0xd9d4d039UL, 0xe6db99e5UL, 0x1fa27cf8UL, 0xc4ac5665UL, - 0xf4292244UL, 0x432aff97UL, 0xab9423a7UL, 0xfc93a039UL, - 0x655b59c3UL, 0x8f0ccc92UL, 0xffeff47dUL, 0x85845dd1UL, - 0x6fa87e4fUL, 0xfe2ce6e0UL, 0xa3014314UL, 0x4e0811a1UL, - 0xf7537e82UL, 0xbd3af235UL, 0x2ad7d2bbUL, 0xeb86d391UL, -}; - -static void md5_transform(u32 *hash, const u32 *in) -{ - u32 a, b, c, d, f, g, temp; - int i; - struct md5_step *step; - - a = hash[0]; - b = hash[1]; - c = hash[2]; - d = hash[3]; - - for ( i = 0 ; i < 64 ; i++ ) { - step = &md5_steps[i >> 4]; - f = step->f ( b, c, d ); - g = ( ( i * step->coefficient + step->constant ) & 0xf ); - temp = d; - d = c; - c = b; - a += ( f + k[i] + in[g] ); - a = ( ( a << r[i] ) | ( a >> ( 32-r[i] ) ) ); - b += a; - a = temp; - } - - hash[0] += a; - hash[1] += b; - hash[2] += c; - hash[3] += d; -} - -/* XXX: this stuff can be optimized */ -static inline void le32_to_cpu_array(u32 *buf, unsigned int words) -{ - while (words--) { - le32_to_cpus(buf); - buf++; - } -} - -static inline void cpu_to_le32_array(u32 *buf, unsigned int words) -{ - while (words--) { - cpu_to_le32s(buf); - buf++; - } -} - -static inline void md5_transform_helper(struct md5_ctx *ctx) -{ - le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32)); - md5_transform(ctx->hash, ctx->block); -} - -static void md5_init(void *context) -{ - struct md5_ctx *mctx = context; - - mctx->hash[0] = 0x67452301; - mctx->hash[1] = 0xefcdab89; - mctx->hash[2] = 0x98badcfe; - mctx->hash[3] = 0x10325476; - mctx->byte_count = 0; -} - -static void md5_update(void *context, const void *data, size_t len) -{ - struct md5_ctx *mctx = context; - const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f); - - mctx->byte_count += len; - - if (avail > len) { - memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), - data, len); - return; - } - - memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), - data, avail); - - md5_transform_helper(mctx); - data += avail; - len -= avail; - - while (len >= sizeof(mctx->block)) { - memcpy(mctx->block, data, sizeof(mctx->block)); - md5_transform_helper(mctx); - data += sizeof(mctx->block); - len -= sizeof(mctx->block); - } - - memcpy(mctx->block, data, len); -} - -static void md5_final(void *context, void *out) -{ - struct md5_ctx *mctx = context; - const unsigned int offset = mctx->byte_count & 0x3f; - char *p = (char *)mctx->block + offset; - int padding = 56 - (offset + 1); - - *p++ = 0x80; - if (padding < 0) { - memset(p, 0x00, padding + sizeof (u64)); - md5_transform_helper(mctx); - p = (char *)mctx->block; - padding = 56; - } - - memset(p, 0, padding); - mctx->block[14] = mctx->byte_count << 3; - mctx->block[15] = mctx->byte_count >> 29; - le32_to_cpu_array(mctx->block, (sizeof(mctx->block) - - sizeof(u64)) / sizeof(u32)); - md5_transform(mctx->hash, mctx->block); - cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32)); - memcpy(out, mctx->hash, sizeof(mctx->hash)); - memset(mctx, 0, sizeof(*mctx)); -} - -struct digest_algorithm md5_algorithm = { - .name = "md5", - .ctxsize = MD5_CTX_SIZE, - .blocksize = ( MD5_BLOCK_WORDS * 4 ), - .digestsize = MD5_DIGEST_SIZE, - .init = md5_init, - .update = md5_update, - .final = md5_final, -}; |