md5加密算法C++程序

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

/* Constants for MD5Transform routine.
*/

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9 F. N" ]8 D, D' L% ^#define S11 7
#define S12 12
; X% A3 t; ?' O; a#define S13 17
#define S14 22
! e6 @/ W, _! y, P2 U4 e#define S21 5
4 \& A v" w$ y$ R& e) s#define S22 9
#define S23 14
9 }9 W+ F3 F# y, l0 P- V4 T#define S24 20
0 D# l; I1 g' j#define S31 4
6 t6 a( Q$ c+ ^#define S32 11
1 Y4 I j3 D5 j7 u#define S33 16
#define S34 23
% J9 Q1 F. F) {: y; R6 K#define S41 6
#define S42 10
#define S43 15
! ]. a9 f* |8 T$ T' E#define S44 21

3 i& Z( |8 p7 L& l+ {: Hstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
* B: A# e h# ]$ _static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
# \: k3 V0 Q- \" y& Y- E& q$ fstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

. y. v& m) G0 A6 }) k$ nstatic 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 ^0 ^# |4 }" L};

$ `7 b+ s" i N' L% Z( x/* F, G, H and I are basic MD5 functions.
*/
% c3 C4 {3 t. G$ H E#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
& r* s1 H" {% s3 c& k2 G#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)))
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5 Q, C- F; g9 K" u# Q$ q) m/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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" ]1 B X. ]( l& b/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
1 U5 m9 E. D$ m [! h; o+ oRotation is separate from addition to prevent recomputation.
*/
) b R3 u0 a6 k# y7 h#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
: L; v+ n/ ^* a* o- s#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); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
2 v+ M0 L4 L: C: x$ H{
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;
}

9 @; q- H% K7 E/ M& G% U/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
2 G! Q$ z' {# u4 B% P' ivoid MD5Update (context, input, inputLen)
9 D: T) S* Q8 R* L# E+ e1 e/ o: DMD5_CTX *context; /* context */
+ z2 [% u9 e- c; t+ eunsigned char *input; /* input block */
% t; W+ x; _- vunsigned int inputLen; /* length of input block */
8 w/ Y1 A% H4 i/ M; _ _{
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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