md5加密算法C++程序

乐乐天

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

/* Constants for MD5Transform routine.
*/

7 r$ s! x# a9 v8 x
: j6 k* s' |' C: E; S" H; t#define S11 7
#define S12 12
#define S13 17
/ X5 |5 \, _2 y% H# M0 y9 ?#define S14 22
9 F$ y& _1 {) w$ m0 ?) J2 X; S7 Z#define S21 5
! V6 }7 e0 M- ?% N#define S22 9
#define S23 14
! z$ _" j1 W8 J6 d @1 U3 W8 u#define S24 20
9 ^+ M" U) ?( |#define S31 4
% A J j$ x& d" V#define S32 11
#define S33 16
, F; H$ l) x- |: Z3 s0 _#define S34 23
4 P! d# w* Y* c X1 @#define S41 6
#define S42 10
#define S43 15
#define S44 21
% A2 d! m# `, F# G( u4 ]* z
2 D& B' \' c/ l, A' Zstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
$ o. ~. N0 `: S' k) e: Xstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
! r c5 D7 g/ Rstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
$ U; z, F0 V( o7 P9 i' Dstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

6 X$ R; a: Z" k' f+ jstatic 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.
*/
; M5 Y$ t5 Q% p" _#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
9 E6 \5 w- q# ?1 A; E#define H(x, y, z) ((x) ^ (y) ^ (z))
# E8 N4 x5 @; Q3 d1 Y#define I(x, y, z) ((y) ^ ((x) | (~z)))
$ W% u1 O- j% n' d: R
/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
, ^ R# F2 `/ H. @+ [$ r; cRotation 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); \
}
8 A3 ^: o9 Y. A+ 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); \
}
& B1 h5 D. M5 v z+ h! t4 o, g#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
% x' C4 g9 \" Y; F* A
7 J3 N. A7 y# E# J. q/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
% ?: z- b: d/ g) L6 c6 J+ p{
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;
) r" J" y6 J0 h2 I; F}
4 G8 _' v6 |0 k6 e' q2 Q& ^
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
' I- y0 Q- n- k/ c; fvoid MD5Update (context, input, inputLen)
; m" D9 }1 I, w0 ]/ gMD5_CTX *context; /* context */
# @1 x8 m4 ^4 h" z0 Funsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
- r* Z8 r/ ^- e1 n1 h% v3 j6 S8 G
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
7 _: } t7 F0 j: E+ K
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

7 t* T Y+ r R% u5 X