md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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( o$ A8 k0 Y( m _4 ~! Y/* Constants for MD5Transform routine.
*/
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1 n0 _4 _9 }% V- F5 B, A#define S11 7
: l8 R/ a" Z+ Z/ Y% W; C$ t#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
; W6 [% a9 ~' x2 y; U0 m#define S23 14
0 Z$ A7 r, x" }* A8 }#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
' o* ?$ T5 l# A" {+ K+ I ~ e#define S41 6
0 R9 w( z* j6 h j#define S42 10
( o! T4 J5 H( ?$ z#define S43 15
( }2 [; [) O0 A5 p% K#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
: c3 R1 D7 N3 m B; j& j3 qstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
6 ]5 j6 a& ]7 h6 }5 jstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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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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/* F, G, H and I are basic MD5 functions.
*/
9 h9 X. ]* X; x) P x3 b$ w#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))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
j7 q) R8 B/ \0 W+ O#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.
*/
#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); \
}
1 A4 P3 M" b$ [/ `( x: Z+ j( p#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
0 I. }- z7 ~/ ]! k' j#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.
*/
void MD5Init (context)
5 Q( R4 ]/ Q" d( o5 F/ AMD5_CTX *context; /* context */
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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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# s9 t! L4 n8 K1 b% g/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
$ e, T4 H' K3 P' o bMD5_CTX *context; /* context */
unsigned char *input; /* input block */
4 P4 y( U: S2 R7 funsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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