md5加密算法C++程序

乐乐天

#include "global.h"
8 X8 L7 }" a2 G' H# p) C#include "md5.h"
) q! a/ N" u& p
% X( o, O8 x. h* p6 Z/* Constants for MD5Transform routine.
*/

+ V5 H- k9 H7 F$ r% v5 D$ p
+ I: Y2 X6 t0 v( e#define S11 7
( S m- [: h: w: F1 m m#define S12 12
6 |3 d0 @4 Y9 M' e#define S13 17
5 w, h0 u5 p+ T" k#define S14 22
#define S21 5
/ q( O9 y1 P. a1 k#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
$ n) Q( w- i9 c+ ?- \) f/ T#define S41 6
1 [0 {( j8 Y$ g9 t$ r. W#define S42 10
- G# V4 A, o/ O, W#define S43 15
* V8 s; _% s) N2 [* H |! t3 _' o#define S44 21

: m) A- k) |0 `. d" G2 m( Y; Xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
; r2 }* C5 l7 L: u5 lstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
/ [, Q6 F# c- V. D. G4 Y+ b$ tstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
- }! ^" h. _& V* X+ y* c% Cstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
& x6 L2 A) r- Y. T( u" w, ~
. ?8 ~, i$ l7 v) nstatic 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
0 H5 b# w1 X2 E4 r* J) q8 O& v};

/* 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))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
9 [7 A6 T$ k0 W2 {- R+ E
/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
- O: }5 f6 o3 K$ b7 aRotation 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); \
}
) d! {0 P e" I#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); \
}
& [9 X. ]7 Q3 ?9 v$ w. s8 \6 R, Z& e#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.
*/
' S" s$ j8 j! `, T9 I, {void MD5Init (context)
MD5_CTX *context; /* context */
6 a' x& Q1 R$ X9 g{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
B' G! }1 `# ~5 |, z& B9 K) u*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
5 T8 ]" E* }! `9 V% D5 ^/ M}
7 e8 e' A4 S2 |
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
: n! O6 W. `1 K1 I) nvoid MD5Update (context, input, inputLen)
5 L2 G" t9 u# E: VMD5_CTX *context; /* context */
unsigned char *input; /* input block */
4 ~7 ]8 Q$ V2 r: p" Munsigned 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);
: x: t9 Q# }. B* c
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

! I2 N$ Z" f% m3 z6 N$ G