md5加密算法C++程序

乐乐天

#include "global.h"
#include "md5.h"

/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
5 v- n; e1 B6 h# x/ c7 h `#define S13 17
p" d! Z$ C5 z: `#define S14 22
#define S21 5
#define S22 9
3 i1 D; q' B$ ]6 G! u3 y#define S23 14
#define S24 20
6 |/ a6 P. o- l' s, J6 u `#define S31 4
#define S32 11
) z0 E$ |1 I8 t O#define S33 16
+ |% g+ D6 ~. e. R7 L5 M#define S34 23
5 C3 z5 y+ H- J#define S41 6
* K0 Y c' N# K8 E* Q#define S42 10
#define S43 15
#define S44 21

# H9 k% ~! D5 M4 `static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
$ [) W0 ?- k0 V2 h L3 Dstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
5 z' B4 }9 ]- Xstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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1 T' h. x- y! B+ t' s3 |- k& Estatic 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.
*/
% e5 D# I7 m4 ~# e1 A8 Y+ ?: K#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
* V6 L8 _6 {2 X. P8 Y#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)))

/* ROTATE_LEFT rotates x left n bits.
*/
) P3 G1 I- N4 A* C9 i#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
3 @/ F3 X& E- O6 G, E p& G#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); \
}
# S& X y {# M; P#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.
*/
" s# G2 k% k* w9 x* v0 M. R/ u+ avoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
; |9 ^. X4 c/ @: F7 f4 d( b*/
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)
( U* m$ U2 P( g& C3 N aMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
# T3 x1 m% |$ U" t T, E{
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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