| /* |
| * 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 "url.h" |
| #include "libavutil/avstring.h" |
| #if CONFIG_GNUTLS |
| #include <gnutls/gnutls.h> |
| #define TLS_read(c, buf, size) gnutls_record_recv(c->session, buf, size) |
| #define TLS_write(c, buf, size) gnutls_record_send(c->session, buf, size) |
| #define TLS_shutdown(c) gnutls_bye(c->session, GNUTLS_SHUT_RDWR) |
| #define TLS_free(c) do { \ |
| if (c->session) \ |
| gnutls_deinit(c->session); \ |
| if (c->cred) \ |
| gnutls_certificate_free_credentials(c->cred); \ |
| } while (0) |
| #elif CONFIG_OPENSSL |
| #include <openssl/bio.h> |
| #include <openssl/ssl.h> |
| #include <openssl/err.h> |
| #define TLS_read(c, buf, size) SSL_read(c->ssl, buf, size) |
| #define TLS_write(c, buf, size) SSL_write(c->ssl, buf, size) |
| #define TLS_shutdown(c) SSL_shutdown(c->ssl) |
| #define TLS_free(c) do { \ |
| if (c->ssl) \ |
| SSL_free(c->ssl); \ |
| if (c->ctx) \ |
| SSL_CTX_free(c->ctx); \ |
| } while (0) |
| #endif |
| #include "network.h" |
| #include "os_support.h" |
| #include "internal.h" |
| #if HAVE_POLL_H |
| #include <poll.h> |
| #endif |
| |
| typedef struct { |
| const AVClass *class; |
| URLContext *tcp; |
| #if CONFIG_GNUTLS |
| gnutls_session_t session; |
| gnutls_certificate_credentials_t cred; |
| #elif CONFIG_OPENSSL |
| SSL_CTX *ctx; |
| SSL *ssl; |
| #endif |
| int fd; |
| } TLSContext; |
| |
| static int do_tls_poll(URLContext *h, int ret) |
| { |
| TLSContext *c = h->priv_data; |
| struct pollfd p = { c->fd, 0, 0 }; |
| #if CONFIG_GNUTLS |
| if (ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED) { |
| av_log(h, AV_LOG_ERROR, "%s\n", gnutls_strerror(ret)); |
| return AVERROR(EIO); |
| } |
| if (gnutls_record_get_direction(c->session)) |
| p.events = POLLOUT; |
| else |
| p.events = POLLIN; |
| #elif CONFIG_OPENSSL |
| ret = SSL_get_error(c->ssl, ret); |
| if (ret == SSL_ERROR_WANT_READ) { |
| p.events = POLLIN; |
| } else if (ret == SSL_ERROR_WANT_WRITE) { |
| p.events = POLLOUT; |
| } else { |
| av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL)); |
| return AVERROR(EIO); |
| } |
| #endif |
| if (h->flags & AVIO_FLAG_NONBLOCK) |
| return AVERROR(EAGAIN); |
| while (1) { |
| int n = poll(&p, 1, 100); |
| if (n > 0) |
| break; |
| if (ff_check_interrupt(&h->interrupt_callback)) |
| return AVERROR(EINTR); |
| } |
| return 0; |
| } |
| |
| static int tls_open(URLContext *h, const char *uri, int flags) |
| { |
| TLSContext *c = h->priv_data; |
| int ret; |
| int port; |
| char buf[200], host[200]; |
| int numerichost = 0; |
| struct addrinfo hints = { 0 }, *ai = NULL; |
| const char *proxy_path; |
| int use_proxy; |
| |
| ff_tls_init(); |
| |
| proxy_path = getenv("http_proxy"); |
| use_proxy = (proxy_path != NULL) && !getenv("no_proxy") && |
| av_strstart(proxy_path, "http://", NULL); |
| |
| av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0, uri); |
| ff_url_join(buf, sizeof(buf), "tcp", NULL, host, port, NULL); |
| |
| hints.ai_flags = AI_NUMERICHOST; |
| if (!getaddrinfo(host, NULL, &hints, &ai)) { |
| numerichost = 1; |
| freeaddrinfo(ai); |
| } |
| |
| if (use_proxy) { |
| char proxy_host[200], proxy_auth[200], dest[200]; |
| int proxy_port; |
| av_url_split(NULL, 0, proxy_auth, sizeof(proxy_auth), |
| proxy_host, sizeof(proxy_host), &proxy_port, NULL, 0, |
| proxy_path); |
| ff_url_join(dest, sizeof(dest), NULL, NULL, host, port, NULL); |
| ff_url_join(buf, sizeof(buf), "httpproxy", proxy_auth, proxy_host, |
| proxy_port, "/%s", dest); |
| } |
| |
| ret = ffurl_open(&c->tcp, buf, AVIO_FLAG_READ_WRITE, |
| &h->interrupt_callback, NULL); |
| if (ret) |
| goto fail; |
| c->fd = ffurl_get_file_handle(c->tcp); |
| |
| #if CONFIG_GNUTLS |
| gnutls_init(&c->session, GNUTLS_CLIENT); |
| if (!numerichost) |
| gnutls_server_name_set(c->session, GNUTLS_NAME_DNS, host, strlen(host)); |
| gnutls_certificate_allocate_credentials(&c->cred); |
| gnutls_certificate_set_verify_flags(c->cred, 0); |
| gnutls_credentials_set(c->session, GNUTLS_CRD_CERTIFICATE, c->cred); |
| gnutls_transport_set_ptr(c->session, (gnutls_transport_ptr_t) |
| (intptr_t) c->fd); |
| gnutls_priority_set_direct(c->session, "NORMAL", NULL); |
| while (1) { |
| ret = gnutls_handshake(c->session); |
| if (ret == 0) |
| break; |
| if ((ret = do_tls_poll(h, ret)) < 0) |
| goto fail; |
| } |
| #elif CONFIG_OPENSSL |
| c->ctx = SSL_CTX_new(TLSv1_client_method()); |
| if (!c->ctx) { |
| av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL)); |
| ret = AVERROR(EIO); |
| goto fail; |
| } |
| c->ssl = SSL_new(c->ctx); |
| if (!c->ssl) { |
| av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL)); |
| ret = AVERROR(EIO); |
| goto fail; |
| } |
| SSL_set_fd(c->ssl, c->fd); |
| if (!numerichost) |
| SSL_set_tlsext_host_name(c->ssl, host); |
| while (1) { |
| ret = SSL_connect(c->ssl); |
| if (ret > 0) |
| break; |
| if (ret == 0) { |
| av_log(h, AV_LOG_ERROR, "Unable to negotiate TLS/SSL session\n"); |
| ret = AVERROR(EIO); |
| goto fail; |
| } |
| if ((ret = do_tls_poll(h, ret)) < 0) |
| goto fail; |
| } |
| #endif |
| return 0; |
| fail: |
| TLS_free(c); |
| if (c->tcp) |
| ffurl_close(c->tcp); |
| ff_tls_deinit(); |
| return ret; |
| } |
| |
| static int tls_read(URLContext *h, uint8_t *buf, int size) |
| { |
| TLSContext *c = h->priv_data; |
| while (1) { |
| int ret = TLS_read(c, buf, size); |
| if (ret > 0) |
| return ret; |
| if (ret == 0) |
| return AVERROR(EIO); |
| if ((ret = do_tls_poll(h, ret)) < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int tls_write(URLContext *h, const uint8_t *buf, int size) |
| { |
| TLSContext *c = h->priv_data; |
| while (1) { |
| int ret = TLS_write(c, buf, size); |
| if (ret > 0) |
| return ret; |
| if (ret == 0) |
| return AVERROR(EIO); |
| if ((ret = do_tls_poll(h, ret)) < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int tls_close(URLContext *h) |
| { |
| TLSContext *c = h->priv_data; |
| TLS_shutdown(c); |
| TLS_free(c); |
| ffurl_close(c->tcp); |
| ff_tls_deinit(); |
| return 0; |
| } |
| |
| URLProtocol ff_tls_protocol = { |
| .name = "tls", |
| .url_open = tls_open, |
| .url_read = tls_read, |
| .url_write = tls_write, |
| .url_close = tls_close, |
| .priv_data_size = sizeof(TLSContext), |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| }; |