md5加密算法C++程序

乐乐天

#include "global.h"
|9 K9 [( q( k; N#include "md5.h"
9 o2 {4 H4 C/ T$ R
/* Constants for MD5Transform routine.
*/

7 A0 f$ B5 }4 D8 B! |5 {
) h! y9 l" q. }: U, X" Y0 W#define S11 7
N0 E9 }) c1 {3 o#define S12 12
#define S13 17
- H F$ m! O U% }#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
: J2 ^, d8 k) {- o& D) W8 {, e#define S33 16
#define S34 23
( J8 V9 Q' z; B: y& [* Z z#define S41 6
, S& A8 w6 Q R5 z! |#define S42 10
/ ~. _6 a7 y" t; Y! p#define S43 15
: w, }# H; q5 Q. l$ q#define S44 21

3 Y7 v+ m8 l* A j* G; J- Tstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
% X" D2 y% c% r4 P5 |8 W, tstatic 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));
0 t& p! S2 s: m$ R6 [& O: ?static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
! Z0 O ?, Y# i
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
};
2 U" F& S9 `- H# i
* l' G( l1 G; L. c( `: Q, j8 p/* 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))
/ G: U+ f. L: N#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
4 @& [ P' d; Q/ C5 ]
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation 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); \
}
$ }3 }+ L w5 _. ^#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
' I( M4 T7 B8 U. V7 yMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
, i" u% \, P W% ^( Q6 v*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
# m: J& \* `; f}

/* 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 */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
7 i( I4 j9 R) p3 D5 r) n{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
- i8 P* K$ ^ z$ V
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

, o. r5 a* g; K0 y6 g6 I