md5加密算法C++程序

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#include "global.h"
+ g) {& M4 F5 A4 o#include "md5.h"

/* Constants for MD5Transform routine.
*/

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#define S11 7
#define S12 12
5 C# L! m: M- r$ `& p& p% f3 x#define S13 17
#define S14 22
, u6 C3 C: t$ J' A7 M$ f#define S21 5
2 q' J8 x0 U* }* q$ ?! A# l#define S22 9
5 k. z. w+ z& A% m. |/ V& `0 s#define S23 14
5 Z8 J& y9 i; i3 y( g" W$ y( ~" [. a#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
" l# b: b* S; t D9 r3 Y# s#define S41 6
5 Z% l- f* U7 P#define S42 10
, a9 s! s: J% j3 G' }#define S43 15
#define S44 21
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2 f3 L; z6 O0 q4 t9 a6 m2 xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
+ N% S( V& K% G( H) b) N8 zstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
: v8 w' q. `3 I* }static 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
};
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+ g" ?5 Y$ S! j$ q/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
# N4 R5 C" t" e, H8 M, q/ d#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
2 W: Z& o/ \ u#define H(x, y, z) ((x) ^ (y) ^ (z))
, N |* \1 W2 [6 |- L#define I(x, y, z) ((y) ^ ((x) | (~z)))
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# h0 x0 Z x7 F" g' V+ |/ w/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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, L4 |( U* d/ t/ I/* 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); \
}
#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); \
}
, g+ b0 W8 {! U" j z: n#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.
*/
* n P+ y4 N4 b5 f1 Y: Gvoid MD5Init (context)
6 O% a8 `* |8 M4 q- eMD5_CTX *context; /* context */
% X( H1 e6 M7 e9 C( _- N: L{
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;
}
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F. f, Z7 N$ ^3 n5 {/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
0 O! ], F( \9 n- |' f8 Munsigned int inputLen; /* length of input block */
$ G! y& N) s8 g: c% z0 b% l. c{
unsigned int i, index, partLen;
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/* 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

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