/* * Copyright (c) 2010 Mans Rullgard * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <stdio.h> #include "libavutil/avstring.h" #include "libavutil/md5.h" #include "libavutil/mem.h" #include "libavutil/error.h" #include "avformat.h" #include "avio.h" #define PRIV_SIZE 128 static int md5_open(URLContext *h, const char *filename, int flags) { if (PRIV_SIZE < av_md5_size) { av_log(NULL, AV_LOG_ERROR, "Insuffient size for MD5 context\n"); return -1; } if (flags != URL_WRONLY) return AVERROR(EINVAL); av_md5_init(h->priv_data); return 0; } static int md5_write(URLContext *h, const unsigned char *buf, int size) { av_md5_update(h->priv_data, buf, size); return size; } static int md5_close(URLContext *h) { const char *filename = h->filename; uint8_t md5[16], buf[64]; URLContext *out; int i, err = 0; av_md5_final(h->priv_data, md5); for (i = 0; i < sizeof(md5); i++) snprintf(buf + i*2, 3, "%02x", md5[i]); buf[i*2] = '\n'; av_strstart(filename, "md5:", &filename); if (*filename) { err = url_open(&out, filename, URL_WRONLY); if (err) return err; err = url_write(out, buf, i*2+1); url_close(out); } else { if (fwrite(buf, 1, i*2+1, stdout) < i*2+1) err = AVERROR(errno); } return err; } static int md5_get_handle(URLContext *h) { return (intptr_t)h->priv_data; } URLProtocol ff_md5_protocol = { .name = "md5", .url_open = md5_open, .url_write = md5_write, .url_close = md5_close, .url_get_file_handle = md5_get_handle, .priv_data_size = PRIV_SIZE, };