md5加密算法C++程序

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

0 R5 c% g' W6 @9 p4 w( t% M0 r/ Q/* Constants for MD5Transform routine.
*/
* g" a) d* H1 r, [4 Z, N# Q7 y
( {9 I1 O/ F. x7 [% _
#define S11 7
+ i6 b8 s8 n' k7 W$ W$ k7 H#define S12 12
" c) I& i- b; d% A* o. F0 s#define S13 17
#define S14 22
#define S21 5
! ?, E. O' t' ~9 z* F# b#define S22 9
) Q5 V. l. _. d& j0 f7 \#define S23 14
) [- c3 D# R1 k) f#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
* T6 m; o- r2 ?6 W( i0 X" `' l: t#define S42 10
#define S43 15
#define S44 21
: `' s, @% c6 {: z
* F- r' A, ~. k C/ ]1 S0 ?static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
. S) ?5 k" @. j O3 s! r' ^static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
" f; u+ P- J& \0 z3 u- ]) C1 q. ^static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
& H' {: {+ t9 L1 e+ b) b' N: qstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

1 P. O6 a( Z6 v4 I2 l9 Sstatic 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
7 T! V' `- I# [};
# R1 c4 f; r' n& f! S& U1 \! M
; n. V9 A5 [) j: v: y/* F, G, H and I are basic MD5 functions.
*/
#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))
1 F: x# [, w1 _' z4 I5 @#define I(x, y, z) ((y) ^ ((x) | (~z)))
; }' [; [! e$ p) Y, v& n( o$ O7 M
/* ROTATE_LEFT rotates x left n bits.
*/
9 Z- ? l' D. P- d% d5 f$ b2 {#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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2 T2 G" _/ I5 u0 {" q6 C/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
; M& v4 u- o6 p: ^, \- K0 i#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); \
}
k( S }8 M; J! t( D7 P#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.
*/
" P' r* [8 }! X9 ~void MD5Init (context)
" k; T0 m( H; e5 ~. j9 \MD5_CTX *context; /* context */
, e# p9 \5 h$ e/ ]{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
+ z% `: E3 p) r$ O; y9 X9 r) m*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
! J: e5 t! Z U3 F}
# V( y, n! q! _/ W, f6 G0 Z
' H, |) Q( T" Q9 {) u! y* D, F/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
4 \4 D: l# o: b1 f! c" @' U& x( U! \MD5_CTX *context; /* context */
# a6 D D( Y+ d8 o- |, h# e; |unsigned char *input; /* input block */
6 E4 K$ L% k/ Z3 L7 T% D+ z4 dunsigned 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);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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