md5加密算法C++程序

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

/* Constants for MD5Transform routine.
*/


% o0 q1 y& H) w& P% c" r#define S11 7
) @0 Y# j5 \0 R( r#define S12 12
" i; `4 W2 u/ {2 S( A! k#define S13 17
#define S14 22
, \9 A* L V/ x& e3 A#define S21 5
9 Y$ u* ~% O) Q+ m) H, |% }3 e#define S22 9
, T% |+ r r1 h1 }1 {/ y#define S23 14
3 a/ z- ]+ D" I W1 J/ n7 [) O#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
- B. q1 M; Q% Y2 h w#define S41 6
#define S42 10
& t9 u6 u4 D0 r& m8 V$ J! o#define S43 15
) q. G! m0 y* m" L& Z: H g; {#define S44 21

2 [: i2 J1 E. u/ X! ~static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
) [' P1 ]6 X5 T estatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
! M0 ^4 T+ U. p. a) I, H7 _1 cstatic 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
};

2 W; x! i; e c% v/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
- F6 q r: @0 y8 @+ x2 |#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
$ k- P9 G' @; d8 p* L+ d; q, [6 j#define H(x, y, z) ((x) ^ (y) ^ (z))
) e* v3 P9 d; i) [4 N: r#define I(x, y, z) ((y) ^ ((x) | (~z)))
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6 @: X* H- P4 B. x( ?4 \) I [; ]/* ROTATE_LEFT rotates x left n bits.
*/
$ B6 l, s3 J9 l! B# p$ Z#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
/ C6 E2 l! |$ P( L& ?
! v' w7 t; a9 G- C' g% b/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
0 b- B0 @/ W' j# }& g z# U#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 ]3 A& n i; V" [0 t* m#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 T R2 ~. r: L, o9 V1 q#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+ p E$ l; s, c3 Q/ k#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)
! E1 \7 e5 W. v6 ^ @, V) JMD5_CTX *context; /* context */
{
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 {' f$ \( f. e3 g2 p}

/ A$ p/ H: x( L( e8 Y/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
) e2 Y. K8 N4 T6 G# W* E4 G jvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
5 ?( r# B7 X' N0 R6 X! gunsigned int inputLen; /* length of input block */
% K* Z+ f% ?+ @{
unsigned int i, index, partLen;
2 l7 o: e$ l9 G" H3 V
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
3 y5 q1 ~% X& b: p* i- k
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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