md5加密算法C++程序

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#include "global.h"
1 c2 H6 k. \! x8 H% `+ s i#include "md5.h"

* W3 l+ |* q2 r2 W- W+ E8 ~5 `7 k/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
# N# v* R; r+ P#define S13 17
+ |0 B5 G" w2 Q$ d5 Y& ?6 r3 D8 ~+ d#define S14 22
- _7 N" T! Q2 l7 t#define S21 5
& ~0 N8 I' {0 h& c# z#define S22 9
#define S23 14
0 }; z' F, V2 w6 p8 M#define S24 20
* i( Y& L( V- t5 n! _: A" F#define S31 4
#define S32 11
2 Y3 _/ B, d8 j3 e3 w; r#define S33 16
#define S34 23
7 o* T; L" h P, s7 u/ Z$ a#define S41 6
- q2 s: l$ J2 j! y) L% |$ |: u) }#define S42 10
#define S43 15
! t' C$ N+ ?! y9 Y5 J#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 S! Z& z+ Q1 U+ W) s3 o0 {static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 u( r" [' l) v. g* B8 {8 hstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
7 T! M. `! ~6 G+ _, m8 m- dstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

3 b+ [( L c1 M qstatic 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.
*/
: @% ?2 S, N7 m W9 Z#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
% L' a* P8 d7 B6 ~6 Z+ P#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
! A7 G) d. H0 b) `6 c, O#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
) \% D9 K, f G }# c
/* 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)); \
(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); \
}
) g2 C1 Z! |: z: E" b! H#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#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.
*/
void MD5Init (context)
1 m/ k/ D! L7 J vMD5_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;
1 r1 [& S& q. h* b5 @}

( u" F! ?# U# @ _! |8 I$ _( \' E8 G8 g/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
4 c0 n" D. B; S! X# _( o% bvoid MD5Update (context, input, inputLen)
! s' O- \* B8 t( vMD5_CTX *context; /* context */
unsigned char *input; /* input block */
/ m# G. d+ X$ P* {( }unsigned int inputLen; /* length of input block */
6 t+ G) ?, X8 ~7 y, N3 J; n6 ]{
unsigned int i, index, partLen;
; N* N* |% V7 L& }3 _4 H
/* 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))
&

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