571ebf7685
Use the C99 'static' keyword to hint to the compiler IVs and output digest sizes. The keyword informs the compiler of the minimum valid size for a given array. Obviously not every pointer can be validated (i.e., the compiler can produce false negative but not false positive reports). No functional change. No ABI change. Sponsored by: EMC / Isilon Storage Division
339 lines
9.6 KiB
C
339 lines
9.6 KiB
C
/*-
|
|
* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
|
|
*
|
|
* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
|
|
* rights reserved.
|
|
*
|
|
* License to copy and use this software is granted provided that it
|
|
* is identified as the "RSA Data Security, Inc. MD5 Message-Digest
|
|
* Algorithm" in all material mentioning or referencing this software
|
|
* or this function.
|
|
*
|
|
* License is also granted to make and use derivative works provided
|
|
* that such works are identified as "derived from the RSA Data
|
|
* Security, Inc. MD5 Message-Digest Algorithm" in all material
|
|
* mentioning or referencing the derived work.
|
|
*
|
|
* RSA Data Security, Inc. makes no representations concerning either
|
|
* the merchantability of this software or the suitability of this
|
|
* software for any particular purpose. It is provided "as is"
|
|
* without express or implied warranty of any kind.
|
|
*
|
|
* These notices must be retained in any copies of any part of this
|
|
* documentation and/or software.
|
|
*
|
|
* This code is the same as the code published by RSA Inc. It has been
|
|
* edited for clarity and style only.
|
|
*/
|
|
|
|
/*
|
|
* This file should be kept in sync with src/lib/libmd/md5c.c
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
|
|
#ifdef _KERNEL
|
|
#include <sys/systm.h>
|
|
#else
|
|
#include <string.h>
|
|
#endif
|
|
|
|
#include <machine/endian.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/md5.h>
|
|
|
|
static void MD5Transform(u_int32_t [4], const unsigned char [64]);
|
|
|
|
#if (BYTE_ORDER == LITTLE_ENDIAN)
|
|
#define Encode memcpy
|
|
#define Decode memcpy
|
|
#else
|
|
|
|
/*
|
|
* Encodes input (u_int32_t) into output (unsigned char). Assumes len is
|
|
* a multiple of 4.
|
|
*/
|
|
|
|
static void
|
|
Encode (unsigned char *output, u_int32_t *input, unsigned int len)
|
|
{
|
|
unsigned int i;
|
|
uint32_t ip;
|
|
|
|
for (i = 0; i < len / 4; i++) {
|
|
ip = input[i];
|
|
*output++ = ip;
|
|
*output++ = ip >> 8;
|
|
*output++ = ip >> 16;
|
|
*output++ = ip >> 24;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Decodes input (unsigned char) into output (u_int32_t). Assumes len is
|
|
* a multiple of 4.
|
|
*/
|
|
|
|
static void
|
|
Decode (u_int32_t *output, const unsigned char *input, unsigned int len)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < len; i += 4) {
|
|
*output++ = input[i] | (input[i+1] << 8) | (input[i+2] << 16) |
|
|
(input[i+3] << 24);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static unsigned char PADDING[64] = {
|
|
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
|
};
|
|
|
|
/* F, G, H and I are basic MD5 functions. */
|
|
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
|
|
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
|
|
#define H(x, y, z) ((x) ^ (y) ^ (z))
|
|
#define I(x, y, z) ((y) ^ ((x) | (~z)))
|
|
|
|
/* ROTATE_LEFT rotates x left n bits. */
|
|
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
|
|
|
|
/*
|
|
* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
|
|
* Rotation is separate from addition to prevent recomputation.
|
|
*/
|
|
#define FF(a, b, c, d, x, s, ac) { \
|
|
(a) += F ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
|
|
(a) = ROTATE_LEFT ((a), (s)); \
|
|
(a) += (b); \
|
|
}
|
|
#define GG(a, b, c, d, x, s, ac) { \
|
|
(a) += G ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
|
|
(a) = ROTATE_LEFT ((a), (s)); \
|
|
(a) += (b); \
|
|
}
|
|
#define HH(a, b, c, d, x, s, ac) { \
|
|
(a) += H ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
|
|
(a) = ROTATE_LEFT ((a), (s)); \
|
|
(a) += (b); \
|
|
}
|
|
#define II(a, b, c, d, x, s, ac) { \
|
|
(a) += I ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
|
|
(a) = ROTATE_LEFT ((a), (s)); \
|
|
(a) += (b); \
|
|
}
|
|
|
|
/* MD5 initialization. Begins an MD5 operation, writing a new context. */
|
|
|
|
void
|
|
MD5Init (context)
|
|
MD5_CTX *context;
|
|
{
|
|
|
|
context->count[0] = context->count[1] = 0;
|
|
|
|
/* Load magic initialization constants. */
|
|
context->state[0] = 0x67452301;
|
|
context->state[1] = 0xefcdab89;
|
|
context->state[2] = 0x98badcfe;
|
|
context->state[3] = 0x10325476;
|
|
}
|
|
|
|
/*
|
|
* MD5 block update operation. Continues an MD5 message-digest
|
|
* operation, processing another message block, and updating the
|
|
* context.
|
|
*/
|
|
|
|
void
|
|
MD5Update (context, in, inputLen)
|
|
MD5_CTX *context;
|
|
const void *in;
|
|
unsigned int inputLen;
|
|
{
|
|
unsigned int i, index, partLen;
|
|
const unsigned char *input = in;
|
|
|
|
/* Compute number of bytes mod 64 */
|
|
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
|
|
|
|
/* Update number of bits */
|
|
if ((context->count[0] += ((u_int32_t)inputLen << 3))
|
|
< ((u_int32_t)inputLen << 3))
|
|
context->count[1]++;
|
|
context->count[1] += ((u_int32_t)inputLen >> 29);
|
|
|
|
partLen = 64 - index;
|
|
|
|
/* Transform as many times as possible. */
|
|
if (inputLen >= partLen) {
|
|
memcpy((void *)&context->buffer[index], (const void *)input,
|
|
partLen);
|
|
MD5Transform (context->state, context->buffer);
|
|
|
|
for (i = partLen; i + 63 < inputLen; i += 64)
|
|
MD5Transform (context->state, &input[i]);
|
|
|
|
index = 0;
|
|
}
|
|
else
|
|
i = 0;
|
|
|
|
/* Buffer remaining input */
|
|
memcpy ((void *)&context->buffer[index], (const void *)&input[i],
|
|
inputLen-i);
|
|
}
|
|
|
|
/*
|
|
* MD5 padding. Adds padding followed by original length.
|
|
*/
|
|
|
|
static void
|
|
MD5Pad (MD5_CTX *context)
|
|
{
|
|
unsigned char bits[8];
|
|
unsigned int index, padLen;
|
|
|
|
/* Save number of bits */
|
|
Encode (bits, context->count, 8);
|
|
|
|
/* Pad out to 56 mod 64. */
|
|
index = (unsigned int)((context->count[0] >> 3) & 0x3f);
|
|
padLen = (index < 56) ? (56 - index) : (120 - index);
|
|
MD5Update (context, PADDING, padLen);
|
|
|
|
/* Append length (before padding) */
|
|
MD5Update (context, bits, 8);
|
|
}
|
|
|
|
/*
|
|
* MD5 finalization. Ends an MD5 message-digest operation, writing the
|
|
* the message digest and zeroizing the context.
|
|
*/
|
|
|
|
void
|
|
MD5Final(unsigned char digest[static MD5_DIGEST_LENGTH], MD5_CTX *context)
|
|
{
|
|
/* Do padding. */
|
|
MD5Pad (context);
|
|
|
|
/* Store state in digest */
|
|
Encode (digest, context->state, MD5_DIGEST_LENGTH);
|
|
|
|
/* Zeroize sensitive information. */
|
|
memset (context, 0, sizeof (*context));
|
|
}
|
|
|
|
/* MD5 basic transformation. Transforms state based on block. */
|
|
|
|
static void
|
|
MD5Transform (state, block)
|
|
u_int32_t state[4];
|
|
const unsigned char block[64];
|
|
{
|
|
u_int32_t a = state[0], b = state[1], c = state[2], d = state[3], x[16];
|
|
|
|
Decode (x, block, 64);
|
|
|
|
/* Round 1 */
|
|
#define S11 7
|
|
#define S12 12
|
|
#define S13 17
|
|
#define S14 22
|
|
FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
|
|
FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
|
|
FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
|
|
FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
|
|
FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
|
|
FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
|
|
FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
|
|
FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
|
|
FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
|
|
FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
|
|
FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
|
|
FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
|
|
FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
|
|
FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
|
|
FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
|
|
FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
|
|
|
|
/* Round 2 */
|
|
#define S21 5
|
|
#define S22 9
|
|
#define S23 14
|
|
#define S24 20
|
|
GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
|
|
GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
|
|
GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
|
|
GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
|
|
GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
|
|
GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */
|
|
GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
|
|
GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
|
|
GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
|
|
GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
|
|
GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
|
|
GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
|
|
GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
|
|
GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
|
|
GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
|
|
GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
|
|
|
|
/* Round 3 */
|
|
#define S31 4
|
|
#define S32 11
|
|
#define S33 16
|
|
#define S34 23
|
|
HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
|
|
HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
|
|
HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
|
|
HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
|
|
HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
|
|
HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
|
|
HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
|
|
HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
|
|
HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
|
|
HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
|
|
HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
|
|
HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
|
|
HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
|
|
HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
|
|
HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
|
|
HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
|
|
|
|
/* Round 4 */
|
|
#define S41 6
|
|
#define S42 10
|
|
#define S43 15
|
|
#define S44 21
|
|
II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
|
|
II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
|
|
II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
|
|
II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
|
|
II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
|
|
II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
|
|
II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
|
|
II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
|
|
II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
|
|
II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
|
|
II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
|
|
II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
|
|
II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
|
|
II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
|
|
II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
|
|
II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
|
|
|
|
state[0] += a;
|
|
state[1] += b;
|
|
state[2] += c;
|
|
state[3] += d;
|
|
|
|
/* Zeroize sensitive information. */
|
|
memset ((void *)x, 0, sizeof (x));
|
|
}
|