md5加密算法C++程序

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#include "global.h"
* t' y" Q1 e3 F: k#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
O6 r% b' q4 `- g#define S21 5
#define S22 9
#define S23 14
" h) J* @- _. x' c7 W' L#define S24 20
; \. H- d$ q. \& v+ R6 A9 U- @, L6 w#define S31 4
8 a# j. D2 z9 O* F& g: J0 m#define S32 11
#define S33 16
1 E, o$ h2 m* s# I$ i; I o#define S34 23
#define S41 6
- R" x8 w: |$ m0 P% U#define S42 10
#define S43 15
4 @2 G- O" d7 b#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
3 M6 P% ` \7 w& gstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
" ]% `2 u6 I; qstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
6 Q6 y z' Z/ P) Y0 Rstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
, A0 L, E. e1 C; U: O1 P5 |) estatic 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
1 z9 l7 v/ Q! c1 Y8 p4 z};
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, v b" l" {( N( ?# u% `" x/* 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)))
3 P* A) I3 V! P: v$ O0 I#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
# m+ n& ]/ A9 x. E E. l) X#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.
" i( m1 u1 I8 N( t5 ^Rotation is separate from addition to prevent recomputation.
*/
: F. ^$ Q4 K: w, y1 q* w9 @6 D! S#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
# Q5 n5 F# I4 g* `#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
; y$ G5 v5 F7 n/ U( `" S#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
7 g: d$ U* |! x#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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0 M, D a8 u r) _- I7 f/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void 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;
, z0 G3 v. p$ ?7 m}

& S9 K6 v$ ^5 L. x/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
$ z* |, f& x; e! Z. I/ L6 dunsigned char *input; /* input block */
- A; e4 z- N& {- ^0 t' Uunsigned int inputLen; /* length of input block */
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unsigned int i, index, partLen;
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/* 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))
&

guoyun786

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