md5加密算法C++程序

乐乐天

#include "global.h"
/ S) q4 D u+ f* W$ Y/ W2 p#include "md5.h"
/ ^3 g! K! r9 Z, z+ @
/* Constants for MD5Transform routine.
*/
( F% x+ {0 U. O8 J/ |5 U

#define S11 7
#define S12 12
# h( p7 n+ L- ?5 a/ w#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
' w! J* F# z: p5 y. |" D4 U#define S32 11
+ `9 _$ K: {* P* e9 ]. q#define S33 16
#define S34 23
#define S41 6
#define S42 10
; u$ j4 d. Z( Q" \2 I/ W#define S43 15
4 n! j" U ^; j2 G#define S44 21

9 v6 T# |3 Y+ P) S( Cstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
) S8 c8 V4 j M* k9 h; {( Z, astatic 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));
' n( J7 h/ Q# S# Q% A
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
! k! g. t% j' D& c& i+ Y};
: _- C9 P/ X5 K
4 ?! S1 P' l! d: V, }/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
$ K7 A' ~* l% o# d#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
1 c* C) Q. a% k3 T, k& c1 a9 l" l#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
8 L8 F6 d) H- B$ u0 a8 Q- m#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

: X) x! E# T7 r# m! ~1 z/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
! f8 }( p2 m) @2 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); \
}
) Q. O3 W4 K4 C7 w. \( Z0 h* 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); \
}
4 E: }( E+ c' @. W#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
( U1 v! w* h2 h7 x, ]/ w
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
+ k8 F( \9 X1 c( F& N& b4 EMD5_CTX *context; /* context */
' y: S' J9 s4 G6 L{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
4 @0 T8 F! b& h+ w0 i) p*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

1 K S8 o, e, A, }: D/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
8 `% L4 R! M, X7 Z& _5 e5 Gvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
* ]/ W7 A& |: e. kunsigned int inputLen; /* length of input block */
" j- d" G: e" j) s# w* E{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
) h B3 g( B. y6 d$ i$ k
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

- e: t" y: I1 y% k2 n
# E& d" q+ b( ~, P! S# I8 \ m( N