ref: 7a222d46af13cebae6695acf49753328d551739c
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) { memcpy(md5->data, data, 64); md5_body(md5, 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, };