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_openssl.c | 233 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 libavformat/tls_openssl.c (limited to 'libavformat/tls_openssl.c') diff --git a/libavformat/tls_openssl.c b/libavformat/tls_openssl.c new file mode 100644 index 0000000000..0fc4122394 --- /dev/null +++ b/libavformat/tls_openssl.c @@ -0,0 +1,233 @@ +/* + * 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 "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" + +#include +#include +#include + +typedef struct TLSContext { + const AVClass *class; + TLSShared tls_shared; + SSL_CTX *ctx; + SSL *ssl; +} TLSContext; + +static int print_tls_error(URLContext *h, int ret) +{ + av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL)); + return AVERROR(EIO); +} + +static int tls_close(URLContext *h) +{ + TLSContext *c = h->priv_data; + if (c->ssl) { + SSL_shutdown(c->ssl); + SSL_free(c->ssl); + } + if (c->ctx) + SSL_CTX_free(c->ctx); + if (c->tls_shared.tcp) + ffurl_close(c->tls_shared.tcp); + ff_tls_deinit(); + return 0; +} + +static int url_bio_create(BIO *b) +{ + b->init = 1; + b->ptr = NULL; + b->flags = 0; + return 1; +} + +static int url_bio_destroy(BIO *b) +{ + return 1; +} + +static int url_bio_bread(BIO *b, char *buf, int len) +{ + URLContext *h = b->ptr; + int ret = ffurl_read(h, buf, len); + if (ret >= 0) + return ret; + BIO_clear_retry_flags(b); + if (ret == AVERROR_EXIT) + return 0; + return -1; +} + +static int url_bio_bwrite(BIO *b, const char *buf, int len) +{ + URLContext *h = b->ptr; + int ret = ffurl_write(h, buf, len); + if (ret >= 0) + return ret; + BIO_clear_retry_flags(b); + if (ret == AVERROR_EXIT) + return 0; + return -1; +} + +static long url_bio_ctrl(BIO *b, int cmd, long num, void *ptr) +{ + if (cmd == BIO_CTRL_FLUSH) { + BIO_clear_retry_flags(b); + return 1; + } + return 0; +} + +static int url_bio_bputs(BIO *b, const char *str) +{ + return url_bio_bwrite(b, str, strlen(str)); +} + +static BIO_METHOD url_bio_method = { + .type = BIO_TYPE_SOURCE_SINK, + .name = "urlprotocol bio", + .bwrite = url_bio_bwrite, + .bread = url_bio_bread, + .bputs = url_bio_bputs, + .bgets = NULL, + .ctrl = url_bio_ctrl, + .create = url_bio_create, + .destroy = url_bio_destroy, +}; + +static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **options) +{ + TLSContext *p = h->priv_data; + TLSShared *c = &p->tls_shared; + BIO *bio; + int ret; + + ff_tls_init(); + + if ((ret = ff_tls_open_underlying(c, h, uri, options)) < 0) + goto fail; + + p->ctx = SSL_CTX_new(c->listen ? TLSv1_server_method() : TLSv1_client_method()); + if (!p->ctx) { + av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL)); + ret = AVERROR(EIO); + goto fail; + } + if (c->ca_file) + SSL_CTX_load_verify_locations(p->ctx, c->ca_file, NULL); + if (c->cert_file && !SSL_CTX_use_certificate_chain_file(p->ctx, c->cert_file)) { + av_log(h, AV_LOG_ERROR, "Unable to load cert file %s: %s\n", + c->cert_file, ERR_error_string(ERR_get_error(), NULL)); + ret = AVERROR(EIO); + goto fail; + } + if (c->key_file && !SSL_CTX_use_PrivateKey_file(p->ctx, c->key_file, SSL_FILETYPE_PEM)) { + av_log(h, AV_LOG_ERROR, "Unable to load key file %s: %s\n", + c->key_file, ERR_error_string(ERR_get_error(), NULL)); + ret = AVERROR(EIO); + goto fail; + } + // Note, this doesn't check that the peer certificate actually matches + // the requested hostname. + if (c->verify) + SSL_CTX_set_verify(p->ctx, SSL_VERIFY_PEER, NULL); + p->ssl = SSL_new(p->ctx); + if (!p->ssl) { + av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL)); + ret = AVERROR(EIO); + goto fail; + } + bio = BIO_new(&url_bio_method); + bio->ptr = c->tcp; + SSL_set_bio(p->ssl, bio, bio); + if (!c->listen && !c->numerichost) + SSL_set_tlsext_host_name(p->ssl, c->host); + ret = c->listen ? SSL_accept(p->ssl) : SSL_connect(p->ssl); + if (ret == 0) { + av_log(h, AV_LOG_ERROR, "Unable to negotiate TLS/SSL session\n"); + ret = AVERROR(EIO); + goto fail; + } else if (ret < 0) { + ret = print_tls_error(h, ret); + 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 = SSL_read(c->ssl, 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 = SSL_write(c->ssl, 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_openssl_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