md5加密算法C++程序

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#include "global.h"
#include "md5.h"

/* Constants for MD5Transform routine.
*/

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; q& [8 e4 s) g: k#define S11 7
( Z7 @0 V0 S, G/ w# [+ T7 J" \& ]2 J#define S12 12
8 E# y$ l: k0 m5 c- r& \#define S13 17
#define S14 22
#define S21 5
1 {2 W+ C, G0 z6 R9 [#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
$ |8 b' H8 {- {#define S33 16
#define S34 23
* y0 j$ i- T$ e ]#define S41 6
! x7 H* V f R# W#define S42 10
4 v4 N1 j" a. w; V, Q#define S43 15
' O8 D$ J, q$ J2 w) V' {; Z#define S44 21
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- l- |; T" K5 q9 a! K! kstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
9 n; ^3 c* {/ L. Y; [7 xstatic 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));
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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
};
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/* 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)))

5 m- a1 Q2 O2 c5 v% M1 j/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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; Q2 U+ ^2 D; M; d& a/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
, b8 H/ H4 D; g! G! e- G |#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/ |+ e* U. b, J/ G8 P" h' ?3 h#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
8 z( N4 I2 J& ]+ ~4 evoid MD5Init (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;
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" s# B, O& m8 Y' ]4 ?8 C/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
9 t( y1 Q. ^; l' O+ t6 ~void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
2 b7 y# f: [! R3 S8 a& B4 d! y9 Qunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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/* 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))
&

guoyun786

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