md5加密算法C++程序

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#include "global.h"
0 E# a, L. D2 p2 s8 c3 u8 r#include "md5.h"
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/* Constants for MD5Transform routine.
*/

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8 Z s+ f5 j2 S2 h; [. {' ^#define S11 7
( ^2 K1 {8 {# K1 G: s- v4 A4 c+ R#define S12 12
% ^ N, I8 y0 j: j; Y+ \9 c#define S13 17
% L0 v* o; w; o/ y9 s, Z#define S14 22
8 e4 V* D# _: R4 R0 p4 P5 c3 y#define S21 5
#define S22 9
. x; x( t' o% y/ g. }" H& w: F#define S23 14
; {+ C+ n* E6 Y* N#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
0 U' `1 k! e3 x% A#define S41 6
#define S42 10
4 i5 }) N! c* \#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
3 d# x* F: V0 L" b0 B: Istatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
# |; Q3 K: t* k. O: b6 ^static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
: H5 t! a# d9 L2 I+ Wstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
0 N5 j b8 Q- N" gstatic 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
};

/* F, G, H and I are basic MD5 functions.
*/
1 w x3 X4 Z- N$ w' ?2 P#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
- d% ^8 h4 G0 {8 l1 o6 N#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

$ X9 s& S; w: N, r/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

. P6 e- f6 a' C) [3 ^3 c% W U/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
( M( ^0 H/ b3 L% J, [+ PRotation 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); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
0 X6 R- M& N2 `- |6 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.
*/
$ ?& E3 Z- t( q8 w" Z. A2 Qvoid MD5Init (context)
, E9 }8 X. j: E& d7 {* iMD5_CTX *context; /* context */
, G6 @4 g9 O% l1 |5 S/ f% P) [* w{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
7 ~6 A" e+ I6 N+ y*/
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.
*/
- X8 A; G% ]% z8 {4 p0 e) \void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
" w( b2 X" q- j( T+ f. D9 z* nunsigned char *input; /* input block */
% K2 w* S) B! X. J" C2 A$ Iunsigned int inputLen; /* length of input block */
r5 Z4 j5 W3 B+ U. e6 m) B{
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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