mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-12-12 21:52:12 +00:00
296 lines
8 KiB
C++
296 lines
8 KiB
C++
/*
|
|
* This code implements the MD5 message-digest algorithm.
|
|
* The algorithm is due to Ron Rivest. This code was
|
|
* written by Colin Plumb in 1993, no copyright is claimed.
|
|
* This code is in the public domain; do with it what you wish.
|
|
*
|
|
* Equivalent code is available from RSA Data Security, Inc.
|
|
* This code has been tested against that, and is equivalent,
|
|
* except that you don't need to include two pages of legalese
|
|
* with every copy.
|
|
*
|
|
* To compute the message digest of a chunk of bytes, declare an
|
|
* MD5Context structure, pass it to MD5Init, call MD5Update as
|
|
* needed on buffers full of bytes, and then call MD5Final, which
|
|
* will fill a supplied 16-byte array with the digest.
|
|
*/
|
|
|
|
#include <string.h> /* for memcpy() */
|
|
|
|
#include "doomtype.h"
|
|
#include "md5.h"
|
|
#include "templates.h"
|
|
#include "files.h"
|
|
|
|
#ifdef __BIG_ENDIAN__
|
|
void byteSwap(uint32_t *buf, unsigned words)
|
|
{
|
|
uint8_t *p = (uint8_t *)buf;
|
|
|
|
do {
|
|
*buf++ = (uint32_t)((unsigned)p[3] << 8 | p[2]) << 16 |
|
|
((unsigned)p[1] << 8 | p[0]);
|
|
p += 4;
|
|
} while (--words);
|
|
}
|
|
#else
|
|
#define byteSwap(buf,words)
|
|
#endif
|
|
|
|
/*
|
|
* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
|
|
* initialization constants.
|
|
*/
|
|
void MD5Context::Init()
|
|
{
|
|
buf[0] = 0x67452301;
|
|
buf[1] = 0xefcdab89;
|
|
buf[2] = 0x98badcfe;
|
|
buf[3] = 0x10325476;
|
|
|
|
bytes[0] = 0;
|
|
bytes[1] = 0;
|
|
}
|
|
|
|
/*
|
|
* Update context to reflect the concatenation of another buffer full
|
|
* of bytes.
|
|
*/
|
|
void MD5Context::Update(const uint8_t *buf, unsigned len)
|
|
{
|
|
uint32_t t;
|
|
|
|
/* Update byte count */
|
|
|
|
t = bytes[0];
|
|
if ((bytes[0] = t + len) < t)
|
|
bytes[1]++; /* Carry from low to high */
|
|
|
|
t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
|
|
if (t > len) {
|
|
memcpy((uint8_t *)in + 64 - t, buf, len);
|
|
return;
|
|
}
|
|
/* First chunk is an odd size */
|
|
if (t < 64)
|
|
{
|
|
memcpy((uint8_t *)in + 64 - t, buf, t);
|
|
byteSwap(in, 16);
|
|
MD5Transform(this->buf, in);
|
|
buf += t;
|
|
len -= t;
|
|
}
|
|
|
|
/* Process data in 64-byte chunks */
|
|
while (len >= 64)
|
|
{
|
|
memcpy(in, buf, 64);
|
|
byteSwap(in, 16);
|
|
MD5Transform(this->buf, in);
|
|
buf += 64;
|
|
len -= 64;
|
|
}
|
|
|
|
/* Handle any remaining bytes of data. */
|
|
memcpy(in, buf, len);
|
|
}
|
|
|
|
void MD5Context::Update(FileReader *file, unsigned len)
|
|
{
|
|
uint8_t readbuf[8192];
|
|
long t;
|
|
|
|
while (len != 0)
|
|
{
|
|
t = MIN<long>(len, sizeof(readbuf));
|
|
len -= t;
|
|
t = file->Read(readbuf, t);
|
|
Update(readbuf, t);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Final wrapup - pad to 64-byte boundary with the bit pattern
|
|
* 1 0* (64-bit count of bits processed, MSB-first)
|
|
*/
|
|
void MD5Context::Final(uint8_t digest[16])
|
|
{
|
|
int count = bytes[0] & 0x3f; /* Number of bytes in ctx->in */
|
|
uint8_t *p = (uint8_t *)in + count;
|
|
|
|
/* Set the first char of padding to 0x80. There is always room. */
|
|
*p++ = 0x80;
|
|
|
|
/* Bytes of padding needed to make 56 bytes (-8..55) */
|
|
count = 56 - 1 - count;
|
|
|
|
if (count < 0) /* Padding forces an extra block */
|
|
{
|
|
memset(p, 0, count + 8);
|
|
byteSwap(in, 16);
|
|
MD5Transform(buf, in);
|
|
p = (uint8_t *)in;
|
|
count = 56;
|
|
}
|
|
memset(p, 0, count);
|
|
byteSwap(in, 14);
|
|
|
|
/* Append length in bits and transform */
|
|
in[14] = bytes[0] << 3;
|
|
in[15] = (bytes[1] << 3) | (bytes[0] >> 29);
|
|
MD5Transform(buf, in);
|
|
|
|
byteSwap(buf, 4);
|
|
memcpy(digest, buf, 16);
|
|
memset(this, 0, sizeof(*this)); /* In case it's sensitive */
|
|
}
|
|
|
|
#ifndef ASM_MD5
|
|
|
|
/* The four core functions - F1 is optimized somewhat */
|
|
|
|
/* #define F1(x, y, z) (x & y | ~x & z) */
|
|
#define F1(x, y, z) (z ^ (x & (y ^ z)))
|
|
#define F2(x, y, z) F1(z, x, y)
|
|
#define F3(x, y, z) (x ^ y ^ z)
|
|
#define F4(x, y, z) (y ^ (x | ~z))
|
|
|
|
/* This is the central step in the MD5 algorithm. */
|
|
#define MD5STEP(f,w,x,y,z,in,s) \
|
|
(w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
|
|
|
|
/*
|
|
* The core of the MD5 algorithm, this alters an existing MD5 hash to
|
|
* reflect the addition of 16 longwords of new data. MD5Update blocks
|
|
* the data and converts bytes into longwords for this routine.
|
|
*/
|
|
void
|
|
MD5Transform(uint32_t buf[4], const uint32_t in[16])
|
|
{
|
|
uint32_t a, b, c, d;
|
|
|
|
a = buf[0];
|
|
b = buf[1];
|
|
c = buf[2];
|
|
d = buf[3];
|
|
|
|
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
|
|
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
|
|
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
|
|
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
|
|
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
|
|
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
|
|
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
|
|
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
|
|
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
|
|
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
|
|
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
|
|
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
|
|
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
|
|
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
|
|
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
|
|
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
|
|
|
|
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
|
|
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
|
|
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
|
|
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
|
|
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
|
|
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
|
|
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
|
|
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
|
|
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
|
|
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
|
|
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
|
|
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
|
|
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
|
|
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
|
|
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
|
|
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
|
|
|
|
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
|
|
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
|
|
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
|
|
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
|
|
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
|
|
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
|
|
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
|
|
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
|
|
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
|
|
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
|
|
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
|
|
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
|
|
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
|
|
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
|
|
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
|
|
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
|
|
|
|
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
|
|
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
|
|
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
|
|
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
|
|
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
|
|
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
|
|
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
|
|
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
|
|
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
|
|
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
|
|
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
|
|
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
|
|
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
|
|
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
|
|
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
|
|
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
|
|
|
|
buf[0] += a;
|
|
buf[1] += b;
|
|
buf[2] += c;
|
|
buf[3] += d;
|
|
}
|
|
|
|
#endif
|
|
|
|
//==========================================================================
|
|
//
|
|
// CCMD md5sum
|
|
//
|
|
// Like the command-line tool, because I wanted to make sure I had it right.
|
|
//
|
|
//==========================================================================
|
|
|
|
#include "c_dispatch.h"
|
|
#include <errno.h>
|
|
|
|
CCMD (md5sum)
|
|
{
|
|
if (argv.argc() < 2)
|
|
{
|
|
Printf("Usage: md5sum <file> ...\n");
|
|
}
|
|
for (int i = 1; i < argv.argc(); ++i)
|
|
{
|
|
FILE *file = fopen(argv[i], "rb");
|
|
if (file == NULL)
|
|
{
|
|
Printf("%s: %s\n", argv[i], strerror(errno));
|
|
}
|
|
else
|
|
{
|
|
MD5Context md5;
|
|
uint8_t readbuf[8192];
|
|
size_t len;
|
|
|
|
while ((len = fread(readbuf, 1, sizeof(readbuf), file)) > 0)
|
|
{
|
|
md5.Update(readbuf, (unsigned int)len);
|
|
}
|
|
md5.Final(readbuf);
|
|
for(int j = 0; j < 16; ++j)
|
|
{
|
|
Printf("%02x", readbuf[j]);
|
|
}
|
|
Printf(" *%s\n", argv[i]);
|
|
fclose (file);
|
|
}
|
|
}
|
|
}
|