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#include "global.h"
0 [8 C& s& j# h2 t7 K2 P) {; k1 [; H#include "md5.h"
+ m* }6 S) R: @ Q
/ K z9 X' n- H+ B* f/* Constants for MD5Transform routine.
*/
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+ F7 ?3 v7 B3 r9 J) o1 b/ w( ?#define S11 7
$ h1 d* ~3 J7 O$ ^" ~( M. s6 U& f. ~#define S12 12
8 V( a. A8 U$ O' X$ F+ V2 G
#define S13 17
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#define S14 22
: t% @0 R* J7 T0 b2 h6 W2 j#define S21 5
; n8 S+ Q; \5 A#define S22 9
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#define S23 14
) v N; M/ f8 r- v- B& U#define S24 20
& e `) D- A3 ^+ O" H3 B1 n#define S31 4
1 h1 }. v" Q. E' J
#define S32 11
$ l/ \; }) L/ C- D+ m#define S33 16
' U; j c1 }+ \) u3 L, s) K/ x
#define S34 23
/ J M) B9 K: | N#define S41 6
V- ^5 V' I! R
#define S42 10
b% `2 i; x" s) e) w) c
#define S43 15
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#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
8 U' i4 }4 N+ S2 V3 {7 k6 w ^, Lstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
P% k7 R: e M, i. e/ o+ [4 M. m2 ?
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
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static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
- i; r- v7 Y) sstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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) ?# G3 d; v) F5 ~# H1 ^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
& w2 v% R8 t9 B8 h0 I0 l};
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/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
: ^! g8 f2 p. j5 y3 y* j#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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( ^* ]( y+ `. @+ y$ ^0 h/* ROTATE_LEFT rotates x left n bits.
*/
! S) R" ^: e+ U, Z3 J#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
% w% d% N) _, Z5 D
" N5 c2 E3 I, V m. U* C/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
8 S* o* s Q% H+ J* H, x M5 TRotation is separate from addition to prevent recomputation.
*/
; ]1 {9 a9 k% v. j: k" r* 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); \
}
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#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
; I$ ]) j+ c! v$ J+ ]#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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+ ~+ g5 N& T. p8 o/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
+ {& q+ h1 w" L* G0 n9 Z, a# |; ivoid MD5Init (context)
: k$ [2 [, K. E6 d9 z' U+ mMD5_CTX *context; /* context */
# e3 _) A( E( r1 {% _+ Z{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
# V. G4 b5 H1 g*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
1 J: R# H8 Y. ?# }& ^0 Q}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
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void MD5Update (context, input, inputLen)
9 f3 b0 ^; ~5 E- g7 b- i3 j( P3 L3 IMD5_CTX *context; /* context */
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unsigned char *input; /* input block */
7 g$ S; C( @9 G6 E0 E% i2 Eunsigned int inputLen; /* length of input block */
# k: T N, U# G7 C6 K{
unsigned int i, index, partLen;
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/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
; `$ b% U% e3 {/ I# z& d
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
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发表于 2004-11-26 20:11:20
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