md5加密算法C++程序

乐乐天

#include "global.h"
" N; c" T& W& X( A/ W5 r#include "md5.h"
/ ~3 H9 i$ e4 g1 Q
: J: Q7 g4 z1 b7 I( E% I/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
#define S13 17
#define S14 22
. j/ a" y. Y# o#define S21 5
#define S22 9
#define S23 14
: J* Q1 D0 P* q#define S24 20
3 L6 C- z: l8 R#define S31 4
#define S32 11
7 d7 K6 J7 s7 _% [#define S33 16
#define S34 23
' X* }+ G, ]- i: D* q& W3 } g#define S41 6
8 B, d7 G1 x9 X, S. A' Q, i#define S42 10
7 K, t( J! ^. I* Y- E- y#define S43 15
$ D( ^4 \, M# J* v4 m8 W7 B9 W$ j#define S44 21
5 @! E2 q) [) {$ B, `
* D* I2 W0 Q0 {0 u0 r5 Pstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
4 h/ E+ b$ [; a* |static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
- `5 n! @- J x7 wstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
# I' j: _9 e* V& ~) Z0 C. T
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
- s* G, e, K) p};

6 T3 e% d9 Q% J0 P2 Q/* 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)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
+ d: }* R- J5 m#define I(x, y, z) ((y) ^ ((x) | (~z)))
# q* |" `* x* M7 A! P( y- E a+ i
/* ROTATE_LEFT rotates x left n bits.
*/
+ m& N1 ?( m& T; w1 ^3 I1 J. V#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
$ m( t: y3 \: q" N
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
& z& T" C& X+ G" ~6 h- ^6 C( E8 rRotation 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); \
}
, _% V6 F6 C1 ?7 C7 p) ?#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); \
}
# u( U0 l; w( M9 \ @& A
' Z6 H$ d! @& b9 u/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
% }. y ?& F, m& nvoid MD5Init (context)
3 Q% ?8 ?0 \5 |' V6 ZMD5_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;
* E- \; G/ }$ a! a' s) X}
! ]3 z4 m5 N0 k
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
8 F* D3 o) i$ T" W% K8 RMD5_CTX *context; /* context */
unsigned char *input; /* input block */
+ u1 k' N i! d5 H$ H$ ~unsigned int inputLen; /* length of input block */
. Q, Z) Y7 {* Y{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
7 X) L5 W# d1 s2 F* u; D# R, d
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

! Z) X1 ?# n+ r7 P) k2 [