md5加密算法C++程序

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

2 s* L* g" }: v, S/* Constants for MD5Transform routine.
*/
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$ d, b0 S- m$ _: Y) ] ^#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
) Q S* m2 }5 e4 }+ ]8 B: p3 L#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
: c- I3 N0 ?% ]#define S33 16
: z( x5 W3 ]4 w v/ _" k9 z$ M#define S34 23
#define S41 6
T) |( s, Q' Z2 E) V#define S42 10
. i: R5 G! K* v#define S43 15
#define S44 21
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% `9 S: C+ L% ~$ d8 J, E& Qstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
/ @& V. z3 p; V$ Z5 sstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
& ~) i, P* Q) }6 S7 R1 i; A. M. F7 i2 Nstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

) u l. `/ r( g/ p; I' U" T. 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
8 u3 S% c% o- x- u* L3 o" ?};

8 @+ @+ X3 ]( E, n3 u/* F, G, H and I are basic MD5 functions.
*/
0 N6 {. k- a8 _. A#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
. G7 Y5 W- c6 y#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
) j F" l8 E8 j" s5 q }#define I(x, y, z) ((y) ^ ((x) | (~z)))

8 o" ~2 Q# L, b/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* 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); \
}
- k \& o9 i8 u! x" H; W#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); \
}
% Y y, Q A2 A#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

4 ?2 w/ t* s& |' {& u/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
$ h: F0 e2 U( ]& o6 tvoid MD5Init (context)
; b+ A, M$ c5 w# e3 b% D0 s# XMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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/* 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 */
/ i3 ]3 u" I \( F; s' w. i+ Lunsigned char *input; /* input block */
( r, y, v9 {' ^5 P" \unsigned int inputLen; /* length of input block */
{
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))
&

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