md5加密算法C++程序

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#include "global.h"
4 g% S/ n( [. q! s3 N#include "md5.h"

" T9 |' H/ U! }1 d5 A. N2 |/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
$ f4 H" G' Z5 N# O I6 a#define S13 17
8 |- y/ r/ ?0 F4 A' | `#define S14 22
. M. C; l: Y7 U4 L" R#define S21 5
#define S22 9
( R0 D4 ?! X9 A2 G3 S p#define S23 14
T1 Z: {- d0 Q4 r# T* m% t#define S24 20
. \2 @' O) ?: f: D5 l2 k0 z2 n#define S31 4
#define S32 11
$ T& I* \! i- u#define S33 16
#define S34 23
5 T7 e$ U T) L6 B) I- s9 q7 [* W#define S41 6
#define S42 10
7 \4 y% k7 J+ M" _# j! A# c#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
4 j/ ]3 B- ?# R6 Y3 @static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
) }1 C3 Q6 B2 dstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
& @4 A! T/ `- Q4 l! vstatic 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) X; F( a8 \ U' U};

" q9 [4 f# k" i8 [/* F, G, H and I are basic MD5 functions.
*/
0 L: X2 R- O/ Q* m+ w. h, A7 d#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
; @# J/ Y; A2 E#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)))
% a* j7 h/ Q# W) ]( }( G
8 b+ p4 X1 y7 N7 D# n `" n- p/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
, R- L& q/ [1 F. P) Z- u% rRotation 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)); \
(a) += (b); \
}
5 |8 {; b/ c$ N! d& H" [* i#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
. g. c+ y; I; m% u* {/ w#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
# f+ v& U% Y/ l- X9 K! S#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
6 U3 k( J9 [( n. I5 R6 e% [void MD5Init (context)
MD5_CTX *context; /* context */
% D: u2 K- f' C9 y. ]3 U{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
/ ?3 p+ U2 U" a5 C7 ~*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
q' \$ _ A. XMD5_CTX *context; /* context */
- H/ Q+ r P4 ~$ eunsigned char *input; /* input block */
3 D5 K2 c) f6 q6 V9 Ounsigned int inputLen; /* length of input block */
9 F% e. k8 ^' X) G{
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))
&

guoyun786

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