md5加密算法C++程序

乐乐天

#include "global.h"
+ v7 j6 v) ^& g, [0 _, S3 d% B- Y#include "md5.h"

% I+ {' D/ P& N& S, ?/* Constants for MD5Transform routine.
*/


#define S11 7
! e- A9 K+ W8 g2 j6 t+ r9 W: \#define S12 12
#define S13 17
#define S14 22
6 [5 N9 x" s ^1 ~: i, g: B#define S21 5
#define S22 9
: j: ~" n7 z% W#define S23 14
8 M- Z7 a6 K/ l3 g% A#define S24 20
' y- c0 M# r2 k" q1 ]5 o7 h: z#define S31 4
#define S32 11
4 `+ a" L* Q Q#define S33 16
#define S34 23
#define S41 6
+ Y4 g8 G6 ]! ?. b) Z! e#define S42 10
1 @, p, w9 \5 T8 t+ d0 Z#define S43 15
. w% G3 D. y: j: p#define S44 21

( g! [: f9 w2 s5 k( f! ~6 H, e6 Rstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
+ c; _. E/ E+ f6 Vstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
w- M( ^3 K6 K2 G# {3 O% ?; sstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
3 ]; E' G+ q/ N' d7 ^
5 u4 s7 e' s' r2 S- Q6 u6 hstatic 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
};
5 f J' b& d2 e* r1 ^* g
/* F, G, H and I are basic MD5 functions.
*/
$ z6 d$ f0 }$ r! X" N' A#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))
* _ v$ }6 _7 L% n7 n' D#define I(x, y, z) ((y) ^ ((x) | (~z)))
% D4 t$ C6 A/ p* G+ p
/* ROTATE_LEFT rotates x left n bits.
*/
7 a J7 G( C/ @! @4 q* C; ^2 H#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
+ B/ Z. z- q2 N0 E#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
& |- r8 p, y$ B7 h0 i- A* S& G I#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 V! Z8 X& l- e3 ^4 |/ d& _#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); \
}
5 V' {" o b: v; o/ H* L5 a# x: G, m: q
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
# U1 H) i8 O3 Z/ {2 h, V+ }4 e{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
" a' z% {2 W. B*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
2 K6 r2 z p8 T}
5 W/ |7 R* W3 C; x1 D4 U/ c% D% d
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
: q2 P7 E8 z0 d# U3 g7 \MD5_CTX *context; /* context */
; S( Q" ^5 t o& \+ ^unsigned char *input; /* input block */
3 Z0 v3 F1 g+ hunsigned int inputLen; /* length of input block */
. ~: z/ X( N# r+ N! O+ T{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786