ref: 7ef74ca1005785f0791874d52217aecc76f190cd
dir: /tools/output/md5.c/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "common/intops.h"
#include "output/muxer.h"
static const uint8_t s[][4] = {
{ 7, 12, 17, 22, },
{ 5, 9, 14, 20, },
{ 4, 11, 16, 23, },
{ 6, 10, 15, 21, },
};
static const unsigned k[] = {
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
};
typedef struct MuxerPriv {
unsigned abcd[4];
uint8_t data[64];
uint64_t len;
FILE *f;
} MD5Context;
static int md5_open(MD5Context *const md5, const char *const file,
const Dav1dPictureParameters *const p,
const unsigned fps[2])
{
if (!strcmp(file, "-")) {
md5->f = stdout;
} else if (!(md5->f = fopen(file, "wb"))) {
fprintf(stderr, "Failed to open %s: %s\n", file, strerror(errno));
return -1;
}
md5->abcd[0] = 0x67452301;
md5->abcd[1] = 0xefcdab89;
md5->abcd[2] = 0x98badcfe;
md5->abcd[3] = 0x10325476;
md5->len = 0;
return 0;
}
static inline unsigned leftrotate(const unsigned x, const unsigned c) {
return (x << c) | (x >> (32 - c));
}
static void md5_body(MD5Context *md5, const uint8_t *const _data) {
const uint32_t *data = (uint32_t *) _data;
unsigned a = md5->abcd[0];
unsigned b = md5->abcd[1];
unsigned c = md5->abcd[2];
unsigned d = md5->abcd[3];
unsigned i;
for (i = 0; i < 64; i++) {
unsigned f, g, tmp;
if (i < 16) {
f = (b & c) | (~b & d);
g = i;
} else if (i < 32) {
f = (d & b) | (~d & c);
g = (5 * i + 1) & 15;
} else if (i < 48) {
f = b ^ c ^ d;
g = (3 * i + 5) & 15;
} else {
f = c ^ (b | ~d);
g = (7 * i) & 15;
}
tmp = d;
d = c;
c = b;
b += leftrotate(a + f + k[i] + data[g], s[i >> 4][i & 3]);
a = tmp;
}
md5->abcd[0] += a;
md5->abcd[1] += b;
md5->abcd[2] += c;
md5->abcd[3] += d;
}
static void md5_update(MD5Context *const md5, const uint8_t *data, unsigned len) {
if (!len) return;
if (md5->len & 63) {
const unsigned tmp = imin(len, 64 - (md5->len & 63));
memcpy(&md5->data[md5->len & 63], data, tmp);
len -= tmp;
data += tmp;
md5->len += tmp;
if (!(md5->len & 63))
md5_body(md5, md5->data);
}
while (len >= 64) {
md5_body(md5, data);
md5->len += 64;
data += 64;
len -= 64;
}
if (len) {
memcpy(md5->data, data, len);
md5->len += len;
}
}
static int md5_write(MD5Context *const md5, Dav1dPicture *const p) {
const int hbd = p->p.bpc > 8;
const int w = p->p.w, h = p->p.h;
uint8_t *yptr = p->data[0];
for (int y = 0; y < h; y++) {
md5_update(md5, yptr, w << hbd);
yptr += p->stride[0];
}
if (p->p.layout != DAV1D_PIXEL_LAYOUT_I400) {
const int ss_ver = p->p.layout == DAV1D_PIXEL_LAYOUT_I420;
const int ss_hor = p->p.layout != DAV1D_PIXEL_LAYOUT_I444;
const int cw = (w + ss_hor) >> ss_hor;
const int ch = (h + ss_ver) >> ss_ver;
for (int pl = 1; pl <= 2; pl++) {
uint8_t *uvptr = p->data[pl];
for (int y = 0; y < ch; y++) {
md5_update(md5, uvptr, cw << hbd);
uvptr += p->stride[1];
}
}
}
dav1d_picture_unref(p);
return 0;
}
static void md5_finish(MD5Context *const md5) {
static const uint8_t bit[2] = { 0x80, 0x00 };
uint64_t len = md5->len << 3;
md5_update(md5, &bit[0], 1);
while ((md5->len & 63) != 56)
md5_update(md5, &bit[1], 1);
md5_update(md5, (uint8_t *) &len, 8);
}
static void md5_close(MD5Context *const md5) {
md5_finish(md5);
for (int i = 0; i < 4; i++)
fprintf(md5->f, "%2.2x%2.2x%2.2x%2.2x",
md5->abcd[i] & 0xff,
(md5->abcd[i] >> 8) & 0xff,
(md5->abcd[i] >> 16) & 0xff,
md5->abcd[i] >> 24);
fprintf(md5->f, "\n");
if (md5->f != stdout)
fclose(md5->f);
}
static int md5_verify(MD5Context *const md5, const char *const md5_str) {
md5_finish(md5);
if (strlen(md5_str) < 32)
return 0;
const char *p = md5_str;
unsigned abcd[4] = { 0 };
char t[3] = { 0 };
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
unsigned val;
char *ignore;
memcpy(t, p, 2);
p += 2;
val = strtoul(t, &ignore, 16);
abcd[i] |= val << (8 * j);
}
}
return !!memcmp(abcd, md5->abcd, sizeof(abcd));
}
const Muxer md5_muxer = {
.priv_data_size = sizeof(MD5Context),
.name = "md5",
.extension = "md5",
.write_header = md5_open,
.write_picture = md5_write,
.write_trailer = md5_close,
.verify = md5_verify,
};