#pragma prototyped
#define md5_description \
"The RSA Data Security, Inc. MD5 Message-Digest Method, 1991-2, \
used with permission. The block count is not printed."
#define md5_options "[+(version)?md5 (RSA Data Security, Inc. MD5 Message-Digest, 1991-2) 1996-02-29]"
#define md5_match "md5|MD5"
#define md5_scale 0
typedef uint32_t UINT4;
typedef struct Md5_s
{
_SUM_PUBLIC_
_SUM_PRIVATE_
UINT4 state[4];
UINT4 count[2];
unsigned char buffer[64];
unsigned char digest[16];
unsigned char digest_sum[16];
} Md5_t;
static const unsigned char md5_pad[] =
{
0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static void
md5_encode(register unsigned char* output, register UINT4* input, unsigned int len)
{
register unsigned int i;
register unsigned int j;
for (i = 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
md5_decode(register UINT4* output, register unsigned char* input, unsigned int len)
{
unsigned int i;
unsigned int j;
for (i = 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);
}
static int
md5_init(Sum_t* p)
{
register Md5_t* context = (Md5_t*)p;
context->count[0] = context->count[1] = 0;
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
return 0;
}
static Sum_t*
md5_open(const Method_t* method, const char* name)
{
Md5_t* p;
if (p = newof(0, Md5_t, 1, 0))
{
p->method = (Method_t*)method;
p->name = name;
md5_init((Sum_t*)p);
}
return (Sum_t*)p;
}
#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
#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)))
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
#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); \
}
static void
md5_transform(UINT4 state[4], unsigned char block[64])
{
UINT4 a = state[0];
UINT4 b = state[1];
UINT4 c = state[2];
UINT4 d = state[3];
UINT4 x[16];
md5_decode(x, block, 64);
FF (a, b, c, d, x[ 0], S11, 0xd76aa478);
FF (d, a, b, c, x[ 1], S12, 0xe8c7b756);
FF (c, d, a, b, x[ 2], S13, 0x242070db);
FF (b, c, d, a, x[ 3], S14, 0xc1bdceee);
FF (a, b, c, d, x[ 4], S11, 0xf57c0faf);
FF (d, a, b, c, x[ 5], S12, 0x4787c62a);
FF (c, d, a, b, x[ 6], S13, 0xa8304613);
FF (b, c, d, a, x[ 7], S14, 0xfd469501);
FF (a, b, c, d, x[ 8], S11, 0x698098d8);
FF (d, a, b, c, x[ 9], S12, 0x8b44f7af);
FF (c, d, a, b, x[10], S13, 0xffff5bb1);
FF (b, c, d, a, x[11], S14, 0x895cd7be);
FF (a, b, c, d, x[12], S11, 0x6b901122);
FF (d, a, b, c, x[13], S12, 0xfd987193);
FF (c, d, a, b, x[14], S13, 0xa679438e);
FF (b, c, d, a, x[15], S14, 0x49b40821);
GG (a, b, c, d, x[ 1], S21, 0xf61e2562);
GG (d, a, b, c, x[ 6], S22, 0xc040b340);
GG (c, d, a, b, x[11], S23, 0x265e5a51);
GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa);
GG (a, b, c, d, x[ 5], S21, 0xd62f105d);
GG (d, a, b, c, x[10], S22, 0x02441453);
GG (c, d, a, b, x[15], S23, 0xd8a1e681);
GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8);
GG (a, b, c, d, x[ 9], S21, 0x21e1cde6);
GG (d, a, b, c, x[14], S22, 0xc33707d6);
GG (c, d, a, b, x[ 3], S23, 0xf4d50d87);
GG (b, c, d, a, x[ 8], S24, 0x455a14ed);
GG (a, b, c, d, x[13], S21, 0xa9e3e905);
GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8);
GG (c, d, a, b, x[ 7], S23, 0x676f02d9);
GG (b, c, d, a, x[12], S24, 0x8d2a4c8a);
HH (a, b, c, d, x[ 5], S31, 0xfffa3942);
HH (d, a, b, c, x[ 8], S32, 0x8771f681);
HH (c, d, a, b, x[11], S33, 0x6d9d6122);
HH (b, c, d, a, x[14], S34, 0xfde5380c);
HH (a, b, c, d, x[ 1], S31, 0xa4beea44);
HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9);
HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60);
HH (b, c, d, a, x[10], S34, 0xbebfbc70);
HH (a, b, c, d, x[13], S31, 0x289b7ec6);
HH (d, a, b, c, x[ 0], S32, 0xeaa127fa);
HH (c, d, a, b, x[ 3], S33, 0xd4ef3085);
HH (b, c, d, a, x[ 6], S34, 0x04881d05);
HH (a, b, c, d, x[ 9], S31, 0xd9d4d039);
HH (d, a, b, c, x[12], S32, 0xe6db99e5);
HH (c, d, a, b, x[15], S33, 0x1fa27cf8);
HH (b, c, d, a, x[ 2], S34, 0xc4ac5665);
II (a, b, c, d, x[ 0], S41, 0xf4292244);
II (d, a, b, c, x[ 7], S42, 0x432aff97);
II (c, d, a, b, x[14], S43, 0xab9423a7);
II (b, c, d, a, x[ 5], S44, 0xfc93a039);
II (a, b, c, d, x[12], S41, 0x655b59c3);
II (d, a, b, c, x[ 3], S42, 0x8f0ccc92);
II (c, d, a, b, x[10], S43, 0xffeff47d);
II (b, c, d, a, x[ 1], S44, 0x85845dd1);
II (a, b, c, d, x[ 8], S41, 0x6fa87e4f);
II (d, a, b, c, x[15], S42, 0xfe2ce6e0);
II (c, d, a, b, x[ 6], S43, 0xa3014314);
II (b, c, d, a, x[13], S44, 0x4e0811a1);
II (a, b, c, d, x[ 4], S41, 0xf7537e82);
II (d, a, b, c, x[11], S42, 0xbd3af235);
II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb);
II (b, c, d, a, x[ 9], S44, 0xeb86d391);
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
}
static int
md5_block(Sum_t* p, const void* s, size_t inputLen)
{
register Md5_t* context = (Md5_t*)p;
unsigned char* input = (unsigned char*)s;
unsigned int i;
unsigned int index;
unsigned int partLen;
index = (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 - index;
if (inputLen >= partLen)
{
memcpy(&context->buffer[index], input, partLen);
md5_transform(context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
md5_transform(context->state, &input[i]);
index = 0;
}
else
i = 0;
memcpy(&context->buffer[index], &input[i], inputLen - i);
return 0;
}
static int
md5_done(Sum_t* p)
{
register Md5_t* context = (Md5_t*)p;
unsigned char bits[8];
unsigned int index;
unsigned int padLen;
md5_encode(bits, context->count, sizeof(bits));
index = (unsigned int)((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
md5_block(p, md5_pad, padLen);
md5_block(p, bits, sizeof(bits));
md5_encode(context->digest, context->state, sizeof(context->digest));
for (index = 0; index < elementsof(context->digest); index++)
context->digest_sum[index] ^= context->digest[index];
return 0;
}
static int
md5_print(Sum_t* p, Sfio_t* sp, register int flags)
{
register Md5_t* x = (Md5_t*)p;
register unsigned char* d;
register int n;
d = (flags & SUM_TOTAL) ? x->digest_sum : x->digest;
for (n = 0; n < elementsof(x->digest); n++)
sfprintf(sp, "%02x", d[n]);
return 0;
}
static int
md5_data(Sum_t* p, Sumdata_t* data)
{
register Md5_t* x = (Md5_t*)p;
data->size = elementsof(x->digest);
data->num = 0;
data->buf = x->digest;
return 0;
}