md5加密算法C++程序

乐乐天

#include "global.h"
#include "md5.h"
, p7 ?7 j5 _& n
7 O: \" `9 g/ W/* Constants for MD5Transform routine.
*/
/ _5 A* e& l- l5 U, [+ u
+ @2 j9 I, _5 x! v, t( N- f- c4 f% j0 [
#define S11 7
#define S12 12
#define S13 17
#define S14 22
# ~- ]2 u5 D2 P$ S#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
- u) ?0 ~ v: [2 N0 G" r#define S33 16
#define S34 23
#define S41 6
8 J1 O4 H" ]. l; D8 n#define S42 10
#define S43 15
#define S44 21
, P/ W G' @. `
static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
4 ~6 E+ d# g* d' Hstatic 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));
7 r4 F7 k2 p5 S2 U9 D$ @1 z |# sstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
( W |4 w) n5 y! |
8 L+ k# s- k b6 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
};
, ~+ c' S7 y" [) N, |
/* 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)))
! Z! ?8 M+ ?) h$ n+ A* X#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
% Y. \. g! n+ u" B% C
- ~& h$ c1 R7 c" U/* 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); \
}
#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); \
}
0 _5 s6 \: R1 P- N3 c2 J/ p
; R* n- R+ I8 u" u4 T6 L' y/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
& ~, c/ I2 f0 ^3 G{
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;
# i! z, E& O5 Z" l. [}
0 ^* h( L3 K3 ~" \ n
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
X X. e; f/ C* ]! x1 J8 }void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
+ M0 `/ r$ K2 S% I) E( ^unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
% B5 E1 l; n" e% N: t{
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))
&

guoyun786

# E+ I# n7 Y# i, \! Q