md5加密算法C++程序

乐乐天

#include "global.h"
#include "md5.h"
" I# \5 r1 e5 `8 W$ N
/* Constants for MD5Transform routine.
*/
! {1 m* e- U% R: k

#define S11 7
7 J9 S3 G1 t: v( `% \#define S12 12
#define S13 17
( f; G: E2 G! x#define S14 22
5 t) m1 a4 T& u2 X5 H7 Q#define S21 5
% r9 D1 w. Z( a3 k% M$ S#define S22 9
! T% y7 M$ k$ w0 |1 V8 g#define S23 14
9 O' b3 E/ h$ B5 @: q9 l5 T; }' ?#define S24 20
6 Q0 @! l4 G8 C2 P7 J#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
+ C/ q/ j, O$ P4 u/ l#define S42 10
( }0 v& A/ f& Z: m) w @$ t* q#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
e2 l6 k; C \* S4 Lstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
" }% Y/ ?; Y9 r+ k+ B' r& y, } W
% q# W7 h4 T$ J/ r: @# q+ ]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
};
; r+ B L4 ^- g6 W
/* 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)))
1 L+ H% v! q2 j: w l#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
. C# Y& T% X# V% L( ~% i9 z" v2 e6 \' ~
/* ROTATE_LEFT rotates x left n bits.
*/
; Y$ T3 y$ ?0 j6 | ~; e' n E9 A#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

: N* p0 ?& u/ [' u. d1 M% ?/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
: }# `8 S# B. [* I8 c#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); \
}
5 v# Y6 B" M! g7 E#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); \
}
+ O$ h: S \2 n3 H7 ^
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
, a K4 o1 P% \void MD5Init (context)
5 I& p q6 }" v- U, E' z% r' u. ]) wMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
7 j0 K0 G" b6 Z% I% |. w; j) m*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
& K8 D( B* n- L9 h3 U}
9 T8 \6 ~0 Y4 P
( A$ a0 j$ g1 j; B# k+ T/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
9 c; i6 b& G( n% J: D; F; Bvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
3 u5 e( E- a$ x. N% }unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
, G9 P' J3 h" a3 ? u- W{
unsigned int i, index, partLen;
/ j0 y2 C* m# e# g+ j8 p8 X
/* 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

2 K; V! ?2 R9 \$ l( l) [' V: O