md5加密算法C++程序

乐乐天

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

/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
#define S13 17
3 a, ]! u- d, l1 c6 [#define S14 22
& D* T Q0 w* I$ h6 u# e, ~# p#define S21 5
( h& P3 X6 Q3 U#define S22 9
#define S23 14
#define S24 20
0 w3 i0 k) N9 \, P7 D#define S31 4
, B0 r& k! j2 B7 d9 y#define S32 11
+ b* o% |: v5 q; H8 D9 q#define S33 16
#define S34 23
#define S41 6
5 u) S0 w, b5 h9 o" s) t% R! D# |#define S42 10
* ]1 r. `( X9 S5 s#define S43 15
#define S44 21
Z- N$ [+ ]+ [+ d1 D) N: o" ]' T% B
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));
+ g2 s+ b2 @ @$ ystatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
$ D& m1 o2 i" V; {) A6 v2 H+ i' ]* Mstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

% ]6 G8 U. e, b5 E( g: g! o! M5 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
. D( W) Z H; M, C; A" f3 @};
0 N5 w5 h1 Y7 U/ h) F. j: M
% n/ G* `" Z+ z7 f. j/* 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))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

7 S- I N* `: @1 C& H! m4 @/* ROTATE_LEFT rotates x left n bits.
*/
( Y# A- o, \* _4 }3 b. V" b2 U#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
4 b$ y( b8 [+ ?; \+ I+ WRotation 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); \
}
#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.
*/
, e4 G+ @- k' i( o# }' t" }9 ?void MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
+ f% @: s! K8 o5 [5 X1 h: ~*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
5 P( T2 V1 a1 y; E
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
# G6 z* ]8 k/ ~void MD5Update (context, input, inputLen)
' r. z" o9 N% Y6 e! XMD5_CTX *context; /* context */
unsigned char *input; /* input block */
9 L6 a" O* W3 N; b+ j5 {unsigned int inputLen; /* length of input block */
7 x& G$ a! S0 o7 v* m, ^{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
8 {# N0 s/ h B7 T* v+ }9 k6 x: R2 l
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

. L8 H! g8 h" a, z4 s$ ?