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Commit 859bad00 authored by Fred Drake's avatar Fred Drake
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Guido said include these in the Great ANSI-fication, so here they are!

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Modules/md5.h
View file @ 859bad00
...@@ -27,18 +27,6 @@ documentation and/or software. ...@@ -27,18 +27,6 @@ documentation and/or software.
/* GLOBAL.H - RSAREF types and constants /* GLOBAL.H - RSAREF types and constants
*/ */
/* PROTOTYPES should be set to one if and only if the compiler supports
function argument prototyping.
The following makes PROTOTYPES default to 0 if it has not already
been defined with C compiler flags.
*/
#ifdef HAVE_PROTOTYPES
#define PROTOTYPES 1
#endif
#ifndef PROTOTYPES
#define PROTOTYPES 0
#endif
/* POINTER defines a generic pointer type */ /* POINTER defines a generic pointer type */
typedef unsigned char *POINTER; typedef unsigned char *POINTER;
...@@ -62,22 +50,13 @@ typedef unsigned long int UINT4; ...@@ -62,22 +50,13 @@ typedef unsigned long int UINT4;
/* Too bad if neither is */ /* Too bad if neither is */
#endif #endif
/* PROTO_LIST is defined depending on how PROTOTYPES is defined above.
If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it
returns an empty list.
*/
#if PROTOTYPES
#define PROTO_LIST(list) list
#else
#define PROTO_LIST(list) ()
#endif
/* ========== End global.h; continue md5.h ========== */ /* ========== End global.h; continue md5.h ========== */
/* MD5 context. */ /* MD5 context. */
typedef struct { typedef struct {
UINT4 state[4]; /* state (ABCD) */ UINT4 state[4]; /* state (ABCD) */
UINT4 count[2]; /* number of bits, modulo 2^64 (lsb first) */ UINT4 count[2]; /* number of bits, modulo 2^64 (lsb first) */
unsigned char buffer[64]; /* input buffer */ unsigned char buffer[64]; /* input buffer */
} MD5_CTX; } MD5_CTX;
/* Rename all exported symbols to avoid conflicts with similarly named /* Rename all exported symbols to avoid conflicts with similarly named
...@@ -87,7 +66,6 @@ typedef struct { ...@@ -87,7 +66,6 @@ typedef struct {
#define MD5Update _Py_MD5Update #define MD5Update _Py_MD5Update
#define MD5Final _Py_MD5Final #define MD5Final _Py_MD5Final
void MD5Init PROTO_LIST ((MD5_CTX *)); void MD5Init(MD5_CTX *);
void MD5Update PROTO_LIST void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
((MD5_CTX *, unsigned char *, unsigned int)); void MD5Final(unsigned char [16], MD5_CTX *);
void MD5Final PROTO_LIST ((unsigned char [16], MD5_CTX *));
Modules/md5c.c
View file @ 859bad00
...@@ -26,8 +26,7 @@ documentation and/or software. ...@@ -26,8 +26,7 @@ documentation and/or software.
#include "config.h" #include "config.h"
#include "md5.h" #include "md5.h"
/* Constants for MD5Transform routine. /* Constants for MD5Transform routine. */
*/
#define S11 7 #define S11 7
#define S12 12 #define S12 12
...@@ -46,290 +45,270 @@ documentation and/or software. ...@@ -46,290 +45,270 @@ documentation and/or software.
#define S43 15 #define S43 15
#define S44 21 #define S44 21
static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64])); static void MD5Transform(UINT4[4], unsigned char[64]);
static void Encode PROTO_LIST static void Encode(unsigned char *, UINT4 *, unsigned int);
((unsigned char *, UINT4 *, unsigned int)); static void Decode(UINT4 *, unsigned char *, unsigned int);
static void Decode PROTO_LIST static void MD5_memcpy(POINTER, POINTER, unsigned int);
((UINT4 *, unsigned char *, unsigned int)); static void MD5_memset(POINTER, int, unsigned int);
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
static unsigned char PADDING[64] = { 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, 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, 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
}; };
/* F, G, H and I are basic MD5 functions. /* F, G, H and I are basic MD5 functions. */
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z))) #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z))) #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z)) #define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z))) #define I(x, y, z) ((y) ^ ((x) | (~z)))
/* ROTATE_LEFT rotates x left n bits. /* ROTATE_LEFT rotates x left n bits. */
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation. Rotation is separate from addition to prevent recomputation.
*/ */
#define FF(a, b, c, d, x, s, ac) { \ #define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \ (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \ (a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \ (a) += (b); \
} }
#define GG(a, b, c, d, x, s, ac) { \ #define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \ (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \ (a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \ (a) += (b); \
} }
#define HH(a, b, c, d, x, s, ac) { \ #define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \ (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \ (a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \ (a) += (b); \
} }
#define II(a, b, c, d, x, s, ac) { \ #define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \ (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \ (a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \ (a) += (b); \
} }
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/ /* MD5 initialization. Begins an MD5 operation, writing a new context. */
void MD5Init (context) void
MD5_CTX *context; /* context */ MD5Init(MD5_CTX *context)
{ {
context->count[0] = context->count[1] = 0; context->count[0] = context->count[1] = 0;
/* Load magic initialization constants. /* Load magic initialization constants. */
*/ context->state[0] = 0x67452301;
context->state[0] = 0x67452301; context->state[1] = 0xefcdab89;
context->state[1] = 0xefcdab89; context->state[2] = 0x98badcfe;
context->state[2] = 0x98badcfe; context->state[3] = 0x10325476;
context->state[3] = 0x10325476;
} }
/* MD5 block update operation. Continues an MD5 message-digest /* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the operation, processing another message block, and updating the
context. context.
*/ */
void MD5Update (context, input, inputLen) void
MD5_CTX *context; /* context */ MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputLen)
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{ {
unsigned int i, index, partLen; unsigned int i, index, partLen;
/* Compute number of bytes mod 64 */ /* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F); index = (unsigned int)((context->count[0] >> 3) & 0x3F);
/* Update number of bits */ /* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3)) if ((context->count[0] += ((UINT4)inputLen << 3))
< ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3))
context->count[1]++; context->count[1]++;
context->count[1] += ((UINT4)inputLen >> 29); context->count[1] += ((UINT4)inputLen >> 29);
partLen = 64 - index; partLen = 64 - index;
/* Transform as many times as possible. /* Transform as many times as possible. */
*/ if (inputLen >= partLen) {
if (inputLen >= partLen) { MD5_memcpy((POINTER)&context->buffer[index], (POINTER)input, partLen);
MD5_memcpy MD5Transform(context->state, context->buffer);
((POINTER)&context->buffer[index], (POINTER)input, partLen);
MD5Transform (context->state, context->buffer); for (i = partLen; i + 63 < inputLen; i += 64)
MD5Transform(context->state, &input[i]);
for (i = partLen; i + 63 < inputLen; i += 64)
MD5Transform (context->state, &input[i]); index = 0;
}
index = 0; else
} i = 0;
else
i = 0; /* Buffer remaining input */
MD5_memcpy((POINTER)&context->buffer[index],
/* Buffer remaining input */ (POINTER)&input[i], inputLen-i);
MD5_memcpy
((POINTER)&context->buffer[index], (POINTER)&input[i],
inputLen-i);
} }
/* MD5 finalization. Ends an MD5 message-digest operation, writing the /* MD5 finalization. Ends an MD5 message-digest operation, writing the
the message digest and zeroizing the context. the message digest and zeroizing the context.
*/ */
void MD5Final (digest, context) void
unsigned char digest[16]; /* message digest */ MD5Final(unsigned char digest[16], MD5_CTX *context)
MD5_CTX *context; /* context */
{ {
unsigned char bits[8]; unsigned char bits[8];
unsigned int index, padLen; unsigned int index, padLen;
/* Save number of bits */ /* Save number of bits */
Encode (bits, context->count, 8); Encode (bits, context->count, 8);
/* Pad out to 56 mod 64. /* Pad out to 56 mod 64. */
*/ index = (unsigned int)((context->count[0] >> 3) & 0x3f);
index = (unsigned int)((context->count[0] >> 3) & 0x3f); padLen = (index < 56) ? (56 - index) : (120 - index);
padLen = (index < 56) ? (56 - index) : (120 - index); MD5Update(context, PADDING, padLen);
MD5Update (context, PADDING, padLen);
/* Append length (before padding) */ /* Append length (before padding) */
MD5Update (context, bits, 8); MD5Update(context, bits, 8);
/* Store state in digest */ /* Store state in digest */
Encode (digest, context->state, 16); Encode(digest, context->state, 16);
/* Zeroize sensitive information. /* Zeroize sensitive information. */
*/ MD5_memset((POINTER)context, 0, sizeof (*context));
MD5_memset ((POINTER)context, 0, sizeof (*context));
} }
/* MD5 basic transformation. Transforms state based on block.
*/ /* MD5 basic transformation. Transforms state based on block. */
static void MD5Transform (state, block) static void
UINT4 state[4]; MD5Transform(UINT4 state[4], unsigned char block[64])
unsigned char block[64];
{ {
UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16]; UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
Decode (x, block, 64); Decode (x, block, 64);
/* Round 1 */ /* Round 1 */
FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */ FF(a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */ FF(d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */ FF(c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */ FF(b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */ FF(a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */ FF(d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */ FF(c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */ FF(b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */ FF(a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */ FF(d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */ FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */ FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */ FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */ FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */ FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */ FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
/* Round 2 */ /* Round 2 */
GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */ GG(a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */ GG(d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */ GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */ GG(b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */ GG(a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */ GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */ GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */ GG(b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */ GG(a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */ GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */ GG(c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ GG(b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ GG(d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ GG(c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
/* Round 3 */ /* Round 3 */
HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */ HH(a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */ HH(d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */ HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */ HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */ HH(a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */ HH(d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */ HH(c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */ HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */ HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */ HH(d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */ HH(c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */ HH(b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */ HH(a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */ HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */ HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */ HH(b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
/* Round 4 */ /* Round 4 */
II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */ II(a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */ II(d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */ II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */ II(b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */ II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */ II(d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */ II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */ II(b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */ II(a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */ II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */ II(c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */ II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */ II(a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */ II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */ II(c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */ II(b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
state[0] += a; state[0] += a;
state[1] += b; state[1] += b;
state[2] += c; state[2] += c;
state[3] += d; state[3] += d;
/* Zeroize sensitive information. /* Zeroize sensitive information. */
*/ MD5_memset((POINTER)x, 0, sizeof (x));
MD5_memset ((POINTER)x, 0, sizeof (x));
} }
/* Encodes input (UINT4) into output (unsigned char). Assumes len is /* Encodes input (UINT4) into output (unsigned char). Assumes len is
a multiple of 4. a multiple of 4.
*/ */
static void Encode (output, input, len) static void
unsigned char *output; Encode(unsigned char *output, UINT4 *input, unsigned int len)
UINT4 *input;
unsigned int len;
{ {
unsigned int i, j; unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) { for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (unsigned char)(input[i] & 0xff); output[j] = (unsigned char)(input[i] & 0xff);
output[j+1] = (unsigned char)((input[i] >> 8) & 0xff); output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
output[j+2] = (unsigned char)((input[i] >> 16) & 0xff); output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
output[j+3] = (unsigned char)((input[i] >> 24) & 0xff); output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
} }
} }
/* Decodes input (unsigned char) into output (UINT4). Assumes len is /* Decodes input (unsigned char) into output (UINT4). Assumes len is
a multiple of 4. a multiple of 4.
*/ */
static void Decode (output, input, len) static void
UINT4 *output; Decode(UINT4 *output, unsigned char *input, unsigned int len)
unsigned char *input;
unsigned int len;
{ {
unsigned int i, j; unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) for (i = 0, j = 0; j < len; i++, j += 4) {
output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) | output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
(((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24); (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}
} }
/* Note: Replace "for loop" with standard memcpy if possible.
*/
static void MD5_memcpy (output, input, len) /* Note: Replace "for loop" with standard memcpy if possible. */
POINTER output; static void
POINTER input; MD5_memcpy(POINTER output, POINTER input, unsigned int len)
unsigned int len;
{ {
unsigned int i; unsigned int i;
for (i = 0; i < len; i++) for (i = 0; i < len; i++)
output[i] = input[i]; output[i] = input[i];
} }
/* Note: Replace "for loop" with standard memset if possible.
*/ /* Note: Replace "for loop" with standard memset if possible. */
static void MD5_memset (output, value, len) static void
POINTER output; MD5_memset(POINTER output, int value, unsigned int len)
int value;
unsigned int len;
{ {
unsigned int i; unsigned int i;
for (i = 0; i < len; i++) for (i = 0; i < len; i++)
((char *)output)[i] = (char)value; ((char *)output)[i] = (char)value;
} }
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