From d8ffb2055f0e0fcb5d025bab72eb19c2a886c125 Mon Sep 17 00:00:00 2001 From: wm4 Date: Tue, 26 May 2015 19:25:41 +0200 Subject: lavf: split tls.c MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Move the OpenSSL and GnuTLS implementations to their own files. Other than the connection code (including options) and some boilerplate, no code is actually shared. Signed-off-by: Martin Storsjö --- libavformat/tls_gnutls.c | 228 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 228 insertions(+) create mode 100644 libavformat/tls_gnutls.c (limited to 'libavformat/tls_gnutls.c') diff --git a/libavformat/tls_gnutls.c b/libavformat/tls_gnutls.c new file mode 100644 index 0000000000..e8037fa44e --- /dev/null +++ b/libavformat/tls_gnutls.c @@ -0,0 +1,228 @@ +/* + * TLS/SSL Protocol + * Copyright (c) 2011 Martin Storsjo + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include + +#include "avformat.h" +#include "internal.h" +#include "network.h" +#include "os_support.h" +#include "url.h" +#include "tls.h" +#include "libavutil/avstring.h" +#include "libavutil/opt.h" +#include "libavutil/parseutils.h" + +typedef struct TLSContext { + const AVClass *class; + TLSShared tls_shared; + gnutls_session_t session; + gnutls_certificate_credentials_t cred; + int need_shutdown; +} TLSContext; + +static int print_tls_error(URLContext *h, int ret) +{ + switch (ret) { + case GNUTLS_E_AGAIN: + case GNUTLS_E_INTERRUPTED: + break; + case GNUTLS_E_WARNING_ALERT_RECEIVED: + av_log(h, AV_LOG_WARNING, "%s\n", gnutls_strerror(ret)); + break; + default: + av_log(h, AV_LOG_ERROR, "%s\n", gnutls_strerror(ret)); + break; + } + return AVERROR(EIO); +} + +static int tls_close(URLContext *h) +{ + TLSContext *c = h->priv_data; + if (c->need_shutdown) + gnutls_bye(c->session, GNUTLS_SHUT_RDWR); + if (c->session) + gnutls_deinit(c->session); + if (c->cred) + gnutls_certificate_free_credentials(c->cred); + if (c->tls_shared.tcp) + ffurl_close(c->tls_shared.tcp); + ff_tls_deinit(); + return 0; +} + +static ssize_t gnutls_url_pull(gnutls_transport_ptr_t transport, + void *buf, size_t len) +{ + URLContext *h = (URLContext*) transport; + int ret = ffurl_read(h, buf, len); + if (ret >= 0) + return ret; + if (ret == AVERROR_EXIT) + return 0; + errno = EIO; + return -1; +} + +static ssize_t gnutls_url_push(gnutls_transport_ptr_t transport, + const void *buf, size_t len) +{ + URLContext *h = (URLContext*) transport; + int ret = ffurl_write(h, buf, len); + if (ret >= 0) + return ret; + if (ret == AVERROR_EXIT) + return 0; + errno = EIO; + return -1; +} + +static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **options) +{ + TLSContext *p = h->priv_data; + TLSShared *c = &p->tls_shared; + int ret; + + ff_tls_init(); + + if ((ret = ff_tls_open_underlying(c, h, uri, options)) < 0) + goto fail; + + gnutls_init(&p->session, c->listen ? GNUTLS_SERVER : GNUTLS_CLIENT); + if (!c->listen && !c->numerichost) + gnutls_server_name_set(p->session, GNUTLS_NAME_DNS, c->host, strlen(c->host)); + gnutls_certificate_allocate_credentials(&p->cred); + if (c->ca_file) + gnutls_certificate_set_x509_trust_file(p->cred, c->ca_file, GNUTLS_X509_FMT_PEM); +#if GNUTLS_VERSION_MAJOR >= 3 + else + gnutls_certificate_set_x509_system_trust(p->cred); +#endif + gnutls_certificate_set_verify_flags(p->cred, c->verify ? + GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT : 0); + if (c->cert_file && c->key_file) { + ret = gnutls_certificate_set_x509_key_file(p->cred, + c->cert_file, c->key_file, + GNUTLS_X509_FMT_PEM); + if (ret < 0) { + av_log(h, AV_LOG_ERROR, + "Unable to set cert/key files %s and %s: %s\n", + c->cert_file, c->key_file, gnutls_strerror(ret)); + ret = AVERROR(EIO); + goto fail; + } + } + gnutls_credentials_set(p->session, GNUTLS_CRD_CERTIFICATE, p->cred); + gnutls_transport_set_pull_function(p->session, gnutls_url_pull); + gnutls_transport_set_push_function(p->session, gnutls_url_push); + gnutls_transport_set_ptr(p->session, c->tcp); + gnutls_priority_set_direct(p->session, "NORMAL", NULL); + ret = gnutls_handshake(p->session); + if (ret) { + ret = print_tls_error(h, ret); + goto fail; + } + p->need_shutdown = 1; + if (c->verify) { + unsigned int status, cert_list_size; + gnutls_x509_crt_t cert; + const gnutls_datum_t *cert_list; + if ((ret = gnutls_certificate_verify_peers2(p->session, &status)) < 0) { + av_log(h, AV_LOG_ERROR, "Unable to verify peer certificate: %s\n", + gnutls_strerror(ret)); + ret = AVERROR(EIO); + goto fail; + } + if (status & GNUTLS_CERT_INVALID) { + av_log(h, AV_LOG_ERROR, "Peer certificate failed verification\n"); + ret = AVERROR(EIO); + goto fail; + } + if (gnutls_certificate_type_get(p->session) != GNUTLS_CRT_X509) { + av_log(h, AV_LOG_ERROR, "Unsupported certificate type\n"); + ret = AVERROR(EIO); + goto fail; + } + gnutls_x509_crt_init(&cert); + cert_list = gnutls_certificate_get_peers(p->session, &cert_list_size); + gnutls_x509_crt_import(cert, cert_list, GNUTLS_X509_FMT_DER); + ret = gnutls_x509_crt_check_hostname(cert, c->host); + gnutls_x509_crt_deinit(cert); + if (!ret) { + av_log(h, AV_LOG_ERROR, + "The certificate's owner does not match hostname %s\n", c->host); + ret = AVERROR(EIO); + goto fail; + } + } + + return 0; +fail: + tls_close(h); + return ret; +} + +static int tls_read(URLContext *h, uint8_t *buf, int size) +{ + TLSContext *c = h->priv_data; + int ret = gnutls_record_recv(c->session, buf, size); + if (ret > 0) + return ret; + if (ret == 0) + return AVERROR_EOF; + return print_tls_error(h, ret); +} + +static int tls_write(URLContext *h, const uint8_t *buf, int size) +{ + TLSContext *c = h->priv_data; + int ret = gnutls_record_send(c->session, buf, size); + if (ret > 0) + return ret; + if (ret == 0) + return AVERROR_EOF; + return print_tls_error(h, ret); +} + +static const AVOption options[] = { + TLS_COMMON_OPTIONS(TLSContext, tls_shared), + { NULL } +}; + +static const AVClass tls_class = { + .class_name = "tls", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +URLProtocol ff_tls_gnutls_protocol = { + .name = "tls", + .url_open2 = tls_open, + .url_read = tls_read, + .url_write = tls_write, + .url_close = tls_close, + .priv_data_size = sizeof(TLSContext), + .flags = URL_PROTOCOL_FLAG_NETWORK, + .priv_data_class = &tls_class, +}; -- cgit v1.2.3