md5加密算法C++程序

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#include "global.h"
: {# R! ~# `1 Y1 ?+ r#include "md5.h"

/* Constants for MD5Transform routine.
*/
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0 F/ I4 k$ p: T2 Z7 T/ W#define S11 7
9 R5 J5 p% N% e" U- k# P#define S12 12
" l+ y; _3 R+ _8 e: B#define S13 17
% v& G% [" Z! d/ o#define S14 22
1 ^* D5 {, w+ `#define S21 5
#define S22 9
#define S23 14
# }7 T1 ~" {1 v0 p% q p6 b/ P#define S24 20
( d; e9 T; \, q9 M#define S31 4
* ^+ h) ^6 A7 X |0 D' u5 z#define S32 11
#define S33 16
#define S34 23
% \5 }, B) {4 \6 h, w7 W4 h5 W! ~#define S41 6
#define S42 10
/ A G% ]7 S- r/ V6 |9 C#define S43 15
#define S44 21
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( R4 N f R+ T! H3 e6 f) zstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
# y- m- d: |* [8 M* P% \! }static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
2 i) B: H0 [! U$ a; t# ^: jstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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# `8 _. }5 R2 u5 ~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.
*/
/ t$ }+ E8 I' V0 d: a J, M0 ?#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))
9 x' l) U% a# j#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* 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.
% u$ y1 Q& b/ {$ O5 f% z3 p5 ]Rotation is separate from addition to prevent recomputation.
*/
! K8 X5 Q& Y3 {#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); \
}
#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)
MD5_CTX *context; /* context */
; ~" u* Y; ?# }" V{
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.
*/
7 r7 j7 }5 |% lvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
4 U. H$ [; D% e: x4 @unsigned char *input; /* input block */
& S6 M! u: c0 @- l& a: Cunsigned int inputLen; /* length of input block */
, m7 U/ R5 u) @/ E1 T; I5 V{
unsigned int i, index, partLen;
* S( y- o. d* o
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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