#include "setup.h"
#ifdef USE_NSS
#include "curl_md4.h"
#include <string.h>
typedef unsigned int UINT4;
typedef struct MD4Context {
UINT4 state[4];
UINT4 count[2];
unsigned char buffer[64];
} MD4_CTX;
#define S11 3
#define S12 7
#define S13 11
#define S14 19
#define S21 3
#define S22 5
#define S23 9
#define S24 13
#define S31 3
#define S32 9
#define S33 11
#define S34 15
static void MD4Transform(UINT4 [4], const unsigned char [64]);
static void Encode(unsigned char *, UINT4 *, unsigned int);
static void Decode(UINT4 *, const unsigned char *, unsigned int);
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
};
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
#define FF(a, b, c, d, x, s) { \
(a) += F ((b), (c), (d)) + (x); \
(a) = ROTATE_LEFT ((a), (s)); \
}
#define GG(a, b, c, d, x, s) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)0x5a827999; \
(a) = ROTATE_LEFT ((a), (s)); \
}
#define HH(a, b, c, d, x, s) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)0x6ed9eba1; \
(a) = ROTATE_LEFT ((a), (s)); \
}
static void MD4Init(MD4_CTX *context)
{
context->count[0] = context->count[1] = 0;
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
static void MD4Update(MD4_CTX *context, const unsigned char *input,
unsigned int inputLen)
{
unsigned int i, bufindex, partLen;
bufindex = (unsigned int)((context->count[0] >> 3) & 0x3F);
if ((context->count[0] += ((UINT4)inputLen << 3))
< ((UINT4)inputLen << 3))
context->count[1]++;
context->count[1] += ((UINT4)inputLen >> 29);
partLen = 64 - bufindex;
if (inputLen >= partLen) {
memcpy(&context->buffer[bufindex], input, partLen);
MD4Transform (context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
MD4Transform (context->state, &input[i]);
bufindex = 0;
}
else
i = 0;
memcpy(&context->buffer[bufindex], &input[i], inputLen-i);
}
static void MD4Pad(MD4_CTX *context)
{
unsigned char bits[8];
unsigned int bufindex, padLen;
Encode (bits, context->count, 8);
bufindex = (unsigned int)((context->count[0] >> 3) & 0x3f);
padLen = (bufindex < 56) ? (56 - bufindex) : (120 - bufindex);
MD4Update (context, PADDING, padLen);
MD4Update (context, bits, 8);
}
static void MD4Final (unsigned char digest[16], MD4_CTX *context)
{
MD4Pad (context);
Encode (digest, context->state, 16);
memset(context, 0, sizeof(*context));
}
static void MD4Transform (UINT4 state[4], const unsigned char block[64])
{
UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
Decode (x, block, 64);
FF (a, b, c, d, x[ 0], S11);
FF (d, a, b, c, x[ 1], S12);
FF (c, d, a, b, x[ 2], S13);
FF (b, c, d, a, x[ 3], S14);
FF (a, b, c, d, x[ 4], S11);
FF (d, a, b, c, x[ 5], S12);
FF (c, d, a, b, x[ 6], S13);
FF (b, c, d, a, x[ 7], S14);
FF (a, b, c, d, x[ 8], S11);
FF (d, a, b, c, x[ 9], S12);
FF (c, d, a, b, x[10], S13);
FF (b, c, d, a, x[11], S14);
FF (a, b, c, d, x[12], S11);
FF (d, a, b, c, x[13], S12);
FF (c, d, a, b, x[14], S13);
FF (b, c, d, a, x[15], S14);
GG (a, b, c, d, x[ 0], S21);
GG (d, a, b, c, x[ 4], S22);
GG (c, d, a, b, x[ 8], S23);
GG (b, c, d, a, x[12], S24);
GG (a, b, c, d, x[ 1], S21);
GG (d, a, b, c, x[ 5], S22);
GG (c, d, a, b, x[ 9], S23);
GG (b, c, d, a, x[13], S24);
GG (a, b, c, d, x[ 2], S21);
GG (d, a, b, c, x[ 6], S22);
GG (c, d, a, b, x[10], S23);
GG (b, c, d, a, x[14], S24);
GG (a, b, c, d, x[ 3], S21);
GG (d, a, b, c, x[ 7], S22);
GG (c, d, a, b, x[11], S23);
GG (b, c, d, a, x[15], S24);
HH (a, b, c, d, x[ 0], S31);
HH (d, a, b, c, x[ 8], S32);
HH (c, d, a, b, x[ 4], S33);
HH (b, c, d, a, x[12], S34);
HH (a, b, c, d, x[ 2], S31);
HH (d, a, b, c, x[10], S32);
HH (c, d, a, b, x[ 6], S33);
HH (b, c, d, a, x[14], S34);
HH (a, b, c, d, x[ 1], S31);
HH (d, a, b, c, x[ 9], S32);
HH (c, d, a, b, x[ 5], S33);
HH (b, c, d, a, x[13], S34);
HH (a, b, c, d, x[ 3], S31);
HH (d, a, b, c, x[11], S32);
HH (c, d, a, b, x[ 7], S33);
HH (b, c, d, a, x[15], S34);
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
memset(x, 0, sizeof(x));
}
static void Encode(unsigned char *output, UINT4 *input, unsigned int len)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (unsigned char)(input[i] & 0xff);
output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
}
}
static void Decode (UINT4 *output, const unsigned char *input, unsigned int len)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
(((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}
void Curl_md4it(unsigned char *output, const unsigned char *input, size_t len)
{
MD4_CTX ctx;
MD4Init(&ctx);
MD4Update(&ctx, input, (unsigned int)len);
MD4Final(output, &ctx);
}
#endif