md5加密算法C++程序

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#include "global.h"
; l7 }4 {& S0 i9 o. s#include "md5.h"

' O9 S4 y) H' X; l0 {/* Constants for MD5Transform routine.
*/


! C1 k. U3 D8 ?#define S11 7
#define S12 12
" `% S# n; g9 \% }& N5 P' h#define S13 17
# c# }% s1 H0 t/ ] q1 B#define S14 22
& `: R. \9 z* N) U) P#define S21 5
#define S22 9
1 V3 J$ {# M9 B3 g! z3 v#define S23 14
8 y; G" L$ J; f9 U* `: p, n#define S24 20
! `( x1 B" c u( d- a o- F! k#define S31 4
9 J$ Y) Z7 j9 J#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
% @5 Y2 A; a, h9 h b3 Fstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
4 M% |4 {0 R6 K3 \' E" j0 [static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
2 A: M- f; e- U0 nstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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
};
" f! P1 h3 {( l
/* 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)))
" U0 E% Q/ ~2 E7 a) v }#define H(x, y, z) ((x) ^ (y) ^ (z))
* l9 P% m2 `5 h. A6 Y#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
: O8 W. e) Y) G4 @+ N7 \% f& E. c# Q#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

7 e6 w1 ?& y" Z' L2 c. S% R! _/* 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); \
}
( J) B2 l5 F9 r4 V5 \. `#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
, o3 m) X2 w9 ^& z* g+ @#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
2 w% R. m. R* `4 J6 K& O2 ~6 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); \
}
2 S8 J& J# p' i- o) v( b
0 p8 ^! Y) F5 H2 `4 A8 U/ N7 R' U; I/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
8 L& {+ `: v/ \4 x8 P! EMD5_CTX *context; /* context */
( K( |$ ] W: @# ^: y8 }{
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;
}
, n" j; v( r5 L* e7 K: ^$ B
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
1 L" N/ C3 z. @2 W3 y+ E% A$ D/ qvoid MD5Update (context, input, inputLen)
8 w, J8 `6 \5 t: h+ lMD5_CTX *context; /* context */
unsigned char *input; /* input block */
; ~3 s4 k3 q/ Munsigned int inputLen; /* length of input block */
( D2 m3 V3 f0 V9 y0 P' x" j{
unsigned int i, index, partLen;
9 ?4 c( y& ^' R* L
/* 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))
&

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