/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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
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.
/* Constants for MD5Transform routine.
static void MD5Transform
PROTO_LIST ((UINT4
[4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4
*, unsigned int));
static void Decode PROTO_LIST
((UINT4
*, unsigned char *, unsigned int));
static void MD5_memcpy
PROTO_LIST ((POINTER
, POINTER
, unsigned int));
static void MD5_memset
PROTO_LIST ((POINTER
, int, unsigned int));
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) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
/* MD5 initialization. Begins an MD5 operation, writing a new context.
MD5_CTX
*context
; /* 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
void MD5Update (context
, input
, inputLen
)
MD5_CTX
*context
; /* context */
unsigned char *input
; /* input block */
unsigned int inputLen
; /* length of input block */
unsigned int i
, index
, partLen
;
/* Compute number of bytes mod 64 */
index
= (unsigned int)((context
->count
[0] >> 3) & 0x3F);
/* Update number of bits */
if ((context
->count
[0] += ((UINT4
)inputLen
<< 3))
< ((UINT4
)inputLen
<< 3))
context
->count
[1] += ((UINT4
)inputLen
>> 29);
/* Transform as many times as possible.
if (inputLen
>= partLen
) {
((POINTER
)&context
->buffer
[index
], (POINTER
)input
, partLen
);
MD5Transform (context
->state
, context
->buffer
);
for (i
= partLen
; i
+ 63 < inputLen
; i
+= 64)
MD5Transform (context
->state
, &input
[i
]);
/* Buffer remaining input */
((POINTER
)&context
->buffer
[index
], (POINTER
)&input
[i
],
/* MD5 finalization. Ends an MD5 message-digest operation, writing the
the message digest and zeroizing the context.
void MD5Final (digest
, context
)
unsigned char digest
[16]; /* message digest */
MD5_CTX
*context
; /* context */
unsigned int index
, padLen
;
/* Save number of bits */
Encode (bits
, context
->count
, 8);
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);
/* Store state in digest */
Encode (digest
, context
->state
, 16);
/* Zeroize sensitive information.
MD5_memset ((POINTER
)context
, 0, sizeof (*context
));
/* MD5 basic transformation. Transforms state based on block.
static void MD5Transform (state
, block
)
UINT4 a
= state
[0], b
= state
[1], c
= state
[2], d
= state
[3], x
[16];
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 */
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 */
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 */
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 */
/* Zeroize sensitive information.
MD5_memset ((POINTER
)x
, 0, sizeof (x
));
/* Encodes input (UINT4) into output (unsigned char). Assumes len is
static void Encode (output
, input
, len
)
for (i
= 0, j
= 0; j
< len
; i
++, j
+= 4) {
output
[j
] = (unsigned char)(input
[i
] & 0xff);
output
[j
+1] = (unsigned char)((input
[i
] >> 8) & 0xff);
output
[j
+2] = (unsigned char)((input
[i
] >> 16) & 0xff);
output
[j
+3] = (unsigned char)((input
[i
] >> 24) & 0xff);
/* Decodes input (unsigned char) into output (UINT4). Assumes len is
static void Decode (output
, input
, len
)
for (i
= 0, j
= 0; j
< len
; i
++, j
+= 4)
output
[i
] = ((UINT4
)input
[j
]) | (((UINT4
)input
[j
+1]) << 8) |
(((UINT4
)input
[j
+2]) << 16) | (((UINT4
)input
[j
+3]) << 24);
/* Note: Replace "for loop" with standard memcpy if possible.
static void MD5_memcpy (output
, input
, len
)
for (i
= 0; i
< len
; i
++)
/* Note: Replace "for loop" with standard memset if possible.
static void MD5_memset (output
, value
, len
)
for (i
= 0; i
< len
; i
++)
((char *)output
)[i
] = (char)value
;