md5加密算法C++程序

乐乐天

#include "global.h"
3 S: n* z8 r) |9 l0 n$ ~: @, b" \#include "md5.h"
; [, Z, X' N: v! S2 Z$ t
/* Constants for MD5Transform routine.
*/
# f+ v2 Q5 v1 z8 Y+ r d2 R

#define S11 7
#define S12 12
2 q3 h+ L2 ^8 E M4 X1 c; J#define S13 17
1 s! s6 U2 f5 \" g$ V4 \#define S14 22
#define S21 5
( v$ x6 Q' ^* \/ G6 [$ F5 X#define S22 9
#define S23 14
#define S24 20
" _2 E5 i8 ^4 i+ @) ^3 t: C; @3 G#define S31 4
#define S32 11
2 ?" r) H% T7 Y) o9 {9 P# |$ K#define S33 16
#define S34 23
#define S41 6
; v7 A$ m0 d7 R; ~#define S42 10
6 `% ^6 g* q; _, |5 q T: b& ^#define S43 15
/ V6 Q5 a. Q2 x2 w" ]6 i; o; e3 e3 [#define S44 21

- b, J* y3 h* ?' `, G8 bstatic 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));
8 V# p' z2 _& a. H1 t9 B6 R0 g$ N9 Wstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
1 Y& V6 v* t+ n4 a
" ?% x9 M0 y4 m* n: O8 qstatic 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
};
* J$ G1 K% q+ f) J% R- L
- h* `: n2 j+ z7 q @/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
, j+ B" ~5 f/ H' S1 b$ @#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
# ~) L9 Y- n( F. v#define H(x, y, z) ((x) ^ (y) ^ (z))
, x+ E j0 j% H: L+ W1 f#define I(x, y, z) ((y) ^ ((x) | (~z)))

: V' v/ j) {, }( n! l& U8 A+ y4 @/* ROTATE_LEFT rotates x left n bits.
*/
" l( q! A9 O; V( G7 e4 T( G9 Y#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
$ S) j4 m8 Q: w# B
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
- l3 K7 y z9 ?% T1 T8 b8 f" U* ?Rotation is separate from addition to prevent recomputation.
*/
/ T/ r! P- Z6 E8 E1 c#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); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/ b: y& q/ q" F3 K9 Q4 q7 m8 H
! E1 F) U$ d. o5 X% a/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
& }* o% s$ |1 U* Xvoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
# I. E9 k0 k2 G3 N*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

# W2 ~( |; Z3 j# y/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
8 B; V2 |$ @' S. k3 nMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
- Q4 o: |) r2 ^ B) |, A8 n- p
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

5 w, J L1 o- a2 H4 B% \' Z