early-access version 1432
This commit is contained in:
pineappleEA
294
externals/ffmpeg/libavformat/tls_gnutls.c
vendored
Executable file
294
externals/ffmpeg/libavformat/tls_gnutls.c
vendored
Executable file
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/*
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* TLS/SSL Protocol
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* Copyright (c) 2011 Martin Storsjo
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <errno.h>
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#include <gnutls/gnutls.h>
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#include <gnutls/x509.h>
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#include "avformat.h"
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#include "internal.h"
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#include "network.h"
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#include "os_support.h"
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#include "url.h"
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#include "tls.h"
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#include "libavcodec/internal.h"
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#include "libavutil/avstring.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#ifndef GNUTLS_VERSION_NUMBER
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#define GNUTLS_VERSION_NUMBER LIBGNUTLS_VERSION_NUMBER
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#endif
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#if HAVE_THREADS && GNUTLS_VERSION_NUMBER <= 0x020b00
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#include <gcrypt.h>
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#include "libavutil/thread.h"
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GCRY_THREAD_OPTION_PTHREAD_IMPL;
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#endif
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typedef struct TLSContext {
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const AVClass *class;
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TLSShared tls_shared;
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gnutls_session_t session;
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gnutls_certificate_credentials_t cred;
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int need_shutdown;
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} TLSContext;
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void ff_gnutls_init(void)
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{
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ff_lock_avformat();
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#if HAVE_THREADS && GNUTLS_VERSION_NUMBER < 0x020b00
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if (gcry_control(GCRYCTL_ANY_INITIALIZATION_P) == 0)
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gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
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#endif
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gnutls_global_init();
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ff_unlock_avformat();
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}
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void ff_gnutls_deinit(void)
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{
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ff_lock_avformat();
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gnutls_global_deinit();
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ff_unlock_avformat();
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}
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static int print_tls_error(URLContext *h, int ret)
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{
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switch (ret) {
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case GNUTLS_E_AGAIN:
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return AVERROR(EAGAIN);
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case GNUTLS_E_INTERRUPTED:
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#ifdef GNUTLS_E_PREMATURE_TERMINATION
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case GNUTLS_E_PREMATURE_TERMINATION:
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#endif
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break;
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case GNUTLS_E_WARNING_ALERT_RECEIVED:
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av_log(h, AV_LOG_WARNING, "%s\n", gnutls_strerror(ret));
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break;
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default:
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av_log(h, AV_LOG_ERROR, "%s\n", gnutls_strerror(ret));
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break;
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}
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return AVERROR(EIO);
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}
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static int tls_close(URLContext *h)
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{
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TLSContext *c = h->priv_data;
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if (c->need_shutdown)
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gnutls_bye(c->session, GNUTLS_SHUT_WR);
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if (c->session)
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gnutls_deinit(c->session);
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if (c->cred)
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gnutls_certificate_free_credentials(c->cred);
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ffurl_closep(&c->tls_shared.tcp);
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ff_gnutls_deinit();
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return 0;
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}
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static ssize_t gnutls_url_pull(gnutls_transport_ptr_t transport,
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void *buf, size_t len)
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{
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URLContext *h = (URLContext*) transport;
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int ret = ffurl_read(h, buf, len);
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if (ret >= 0)
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return ret;
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if (ret == AVERROR_EXIT)
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return 0;
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if (ret == AVERROR(EAGAIN))
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errno = EAGAIN;
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else
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errno = EIO;
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return -1;
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}
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static ssize_t gnutls_url_push(gnutls_transport_ptr_t transport,
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const void *buf, size_t len)
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{
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URLContext *h = (URLContext*) transport;
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int ret = ffurl_write(h, buf, len);
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if (ret >= 0)
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return ret;
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if (ret == AVERROR_EXIT)
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return 0;
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if (ret == AVERROR(EAGAIN))
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errno = EAGAIN;
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else
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errno = EIO;
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return -1;
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}
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static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
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{
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TLSContext *p = h->priv_data;
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TLSShared *c = &p->tls_shared;
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int ret;
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ff_gnutls_init();
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if ((ret = ff_tls_open_underlying(c, h, uri, options)) < 0)
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goto fail;
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gnutls_init(&p->session, c->listen ? GNUTLS_SERVER : GNUTLS_CLIENT);
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if (!c->listen && !c->numerichost)
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gnutls_server_name_set(p->session, GNUTLS_NAME_DNS, c->host, strlen(c->host));
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gnutls_certificate_allocate_credentials(&p->cred);
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if (c->ca_file) {
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ret = gnutls_certificate_set_x509_trust_file(p->cred, c->ca_file, GNUTLS_X509_FMT_PEM);
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if (ret < 0)
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av_log(h, AV_LOG_ERROR, "%s\n", gnutls_strerror(ret));
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}
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#if GNUTLS_VERSION_NUMBER >= 0x030020
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else
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gnutls_certificate_set_x509_system_trust(p->cred);
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#endif
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gnutls_certificate_set_verify_flags(p->cred, c->verify ?
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GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT : 0);
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if (c->cert_file && c->key_file) {
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ret = gnutls_certificate_set_x509_key_file(p->cred,
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c->cert_file, c->key_file,
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GNUTLS_X509_FMT_PEM);
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if (ret < 0) {
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av_log(h, AV_LOG_ERROR,
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"Unable to set cert/key files %s and %s: %s\n",
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c->cert_file, c->key_file, gnutls_strerror(ret));
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ret = AVERROR(EIO);
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goto fail;
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}
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} else if (c->cert_file || c->key_file)
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av_log(h, AV_LOG_ERROR, "cert and key required\n");
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gnutls_credentials_set(p->session, GNUTLS_CRD_CERTIFICATE, p->cred);
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gnutls_transport_set_pull_function(p->session, gnutls_url_pull);
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gnutls_transport_set_push_function(p->session, gnutls_url_push);
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gnutls_transport_set_ptr(p->session, c->tcp);
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gnutls_priority_set_direct(p->session, "NORMAL", NULL);
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do {
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if (ff_check_interrupt(&h->interrupt_callback)) {
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ret = AVERROR_EXIT;
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goto fail;
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}
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ret = gnutls_handshake(p->session);
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if (gnutls_error_is_fatal(ret)) {
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ret = print_tls_error(h, ret);
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goto fail;
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}
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} while (ret);
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p->need_shutdown = 1;
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if (c->verify) {
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unsigned int status, cert_list_size;
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gnutls_x509_crt_t cert;
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const gnutls_datum_t *cert_list;
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if ((ret = gnutls_certificate_verify_peers2(p->session, &status)) < 0) {
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av_log(h, AV_LOG_ERROR, "Unable to verify peer certificate: %s\n",
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gnutls_strerror(ret));
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ret = AVERROR(EIO);
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goto fail;
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}
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if (status & GNUTLS_CERT_INVALID) {
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av_log(h, AV_LOG_ERROR, "Peer certificate failed verification\n");
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ret = AVERROR(EIO);
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goto fail;
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}
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if (gnutls_certificate_type_get(p->session) != GNUTLS_CRT_X509) {
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av_log(h, AV_LOG_ERROR, "Unsupported certificate type\n");
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ret = AVERROR(EIO);
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goto fail;
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}
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gnutls_x509_crt_init(&cert);
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cert_list = gnutls_certificate_get_peers(p->session, &cert_list_size);
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gnutls_x509_crt_import(cert, cert_list, GNUTLS_X509_FMT_DER);
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ret = gnutls_x509_crt_check_hostname(cert, c->host);
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gnutls_x509_crt_deinit(cert);
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if (!ret) {
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av_log(h, AV_LOG_ERROR,
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"The certificate's owner does not match hostname %s\n", c->host);
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ret = AVERROR(EIO);
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goto fail;
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}
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}
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return 0;
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fail:
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tls_close(h);
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return ret;
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}
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static int tls_read(URLContext *h, uint8_t *buf, int size)
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{
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TLSContext *c = h->priv_data;
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int ret;
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// Set or clear the AVIO_FLAG_NONBLOCK on c->tls_shared.tcp
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c->tls_shared.tcp->flags &= ~AVIO_FLAG_NONBLOCK;
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c->tls_shared.tcp->flags |= h->flags & AVIO_FLAG_NONBLOCK;
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ret = gnutls_record_recv(c->session, buf, size);
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if (ret > 0)
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return ret;
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if (ret == 0)
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return AVERROR_EOF;
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return print_tls_error(h, ret);
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}
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static int tls_write(URLContext *h, const uint8_t *buf, int size)
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{
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TLSContext *c = h->priv_data;
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int ret;
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// Set or clear the AVIO_FLAG_NONBLOCK on c->tls_shared.tcp
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c->tls_shared.tcp->flags &= ~AVIO_FLAG_NONBLOCK;
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c->tls_shared.tcp->flags |= h->flags & AVIO_FLAG_NONBLOCK;
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ret = gnutls_record_send(c->session, buf, size);
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if (ret > 0)
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return ret;
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if (ret == 0)
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return AVERROR_EOF;
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return print_tls_error(h, ret);
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}
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static int tls_get_file_handle(URLContext *h)
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{
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TLSContext *c = h->priv_data;
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return ffurl_get_file_handle(c->tls_shared.tcp);
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}
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static const AVOption options[] = {
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TLS_COMMON_OPTIONS(TLSContext, tls_shared),
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{ NULL }
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};
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static const AVClass tls_class = {
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.class_name = "tls",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const URLProtocol ff_tls_protocol = {
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.name = "tls",
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.url_open2 = tls_open,
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.url_read = tls_read,
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.url_write = tls_write,
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.url_close = tls_close,
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.url_get_file_handle = tls_get_file_handle,
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.priv_data_size = sizeof(TLSContext),
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.flags = URL_PROTOCOL_FLAG_NETWORK,
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.priv_data_class = &tls_class,
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};
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