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00022 #include "avformat.h"
00023 #include "url.h"
00024 #include "libavutil/avstring.h"
00025 #if CONFIG_GNUTLS
00026 #include <gnutls/gnutls.h>
00027 #define TLS_read(c, buf, size) gnutls_record_recv(c->session, buf, size)
00028 #define TLS_write(c, buf, size) gnutls_record_send(c->session, buf, size)
00029 #define TLS_shutdown(c) gnutls_bye(c->session, GNUTLS_SHUT_RDWR)
00030 #define TLS_free(c) do { \
00031 if (c->session) \
00032 gnutls_deinit(c->session); \
00033 if (c->cred) \
00034 gnutls_certificate_free_credentials(c->cred); \
00035 } while (0)
00036 #elif CONFIG_OPENSSL
00037 #include <openssl/bio.h>
00038 #include <openssl/ssl.h>
00039 #include <openssl/err.h>
00040 #define TLS_read(c, buf, size) SSL_read(c->ssl, buf, size)
00041 #define TLS_write(c, buf, size) SSL_write(c->ssl, buf, size)
00042 #define TLS_shutdown(c) SSL_shutdown(c->ssl)
00043 #define TLS_free(c) do { \
00044 if (c->ssl) \
00045 SSL_free(c->ssl); \
00046 if (c->ctx) \
00047 SSL_CTX_free(c->ctx); \
00048 } while (0)
00049 #endif
00050 #include "network.h"
00051 #include "os_support.h"
00052 #include "internal.h"
00053 #if HAVE_POLL_H
00054 #include <poll.h>
00055 #endif
00056
00057 typedef struct {
00058 const AVClass *class;
00059 URLContext *tcp;
00060 #if CONFIG_GNUTLS
00061 gnutls_session_t session;
00062 gnutls_certificate_credentials_t cred;
00063 #elif CONFIG_OPENSSL
00064 SSL_CTX *ctx;
00065 SSL *ssl;
00066 #endif
00067 int fd;
00068 } TLSContext;
00069
00070 static int do_tls_poll(URLContext *h, int ret)
00071 {
00072 TLSContext *c = h->priv_data;
00073 struct pollfd p = { c->fd, 0, 0 };
00074 #if CONFIG_GNUTLS
00075 if (ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED) {
00076 av_log(h, AV_LOG_ERROR, "%s\n", gnutls_strerror(ret));
00077 return AVERROR(EIO);
00078 }
00079 if (gnutls_record_get_direction(c->session))
00080 p.events = POLLOUT;
00081 else
00082 p.events = POLLIN;
00083 #elif CONFIG_OPENSSL
00084 ret = SSL_get_error(c->ssl, ret);
00085 if (ret == SSL_ERROR_WANT_READ) {
00086 p.events = POLLIN;
00087 } else if (ret == SSL_ERROR_WANT_WRITE) {
00088 p.events = POLLOUT;
00089 } else {
00090 av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
00091 return AVERROR(EIO);
00092 }
00093 #endif
00094 if (h->flags & AVIO_FLAG_NONBLOCK)
00095 return AVERROR(EAGAIN);
00096 while (1) {
00097 int n = poll(&p, 1, 100);
00098 if (n > 0)
00099 break;
00100 if (ff_check_interrupt(&h->interrupt_callback))
00101 return AVERROR(EINTR);
00102 }
00103 return 0;
00104 }
00105
00106 static int tls_open(URLContext *h, const char *uri, int flags)
00107 {
00108 TLSContext *c = h->priv_data;
00109 int ret;
00110 int port;
00111 char buf[200], host[200];
00112 int numerichost = 0;
00113 struct addrinfo hints = { 0 }, *ai = NULL;
00114 const char *proxy_path;
00115 int use_proxy;
00116
00117 ff_tls_init();
00118
00119 proxy_path = getenv("http_proxy");
00120 use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
00121 av_strstart(proxy_path, "http://", NULL);
00122
00123 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0, uri);
00124 ff_url_join(buf, sizeof(buf), "tcp", NULL, host, port, NULL);
00125
00126 hints.ai_flags = AI_NUMERICHOST;
00127 if (!getaddrinfo(host, NULL, &hints, &ai)) {
00128 numerichost = 1;
00129 freeaddrinfo(ai);
00130 }
00131
00132 if (use_proxy) {
00133 char proxy_host[200], proxy_auth[200], dest[200];
00134 int proxy_port;
00135 av_url_split(NULL, 0, proxy_auth, sizeof(proxy_auth),
00136 proxy_host, sizeof(proxy_host), &proxy_port, NULL, 0,
00137 proxy_path);
00138 ff_url_join(dest, sizeof(dest), NULL, NULL, host, port, NULL);
00139 ff_url_join(buf, sizeof(buf), "httpproxy", proxy_auth, proxy_host,
00140 proxy_port, "/%s", dest);
00141 }
00142
00143 ret = ffurl_open(&c->tcp, buf, AVIO_FLAG_READ_WRITE,
00144 &h->interrupt_callback, NULL);
00145 if (ret)
00146 goto fail;
00147 c->fd = ffurl_get_file_handle(c->tcp);
00148
00149 #if CONFIG_GNUTLS
00150 gnutls_init(&c->session, GNUTLS_CLIENT);
00151 if (!numerichost)
00152 gnutls_server_name_set(c->session, GNUTLS_NAME_DNS, host, strlen(host));
00153 gnutls_certificate_allocate_credentials(&c->cred);
00154 gnutls_certificate_set_verify_flags(c->cred, 0);
00155 gnutls_credentials_set(c->session, GNUTLS_CRD_CERTIFICATE, c->cred);
00156 gnutls_transport_set_ptr(c->session, (gnutls_transport_ptr_t)
00157 (intptr_t) c->fd);
00158 gnutls_priority_set_direct(c->session, "NORMAL", NULL);
00159 while (1) {
00160 ret = gnutls_handshake(c->session);
00161 if (ret == 0)
00162 break;
00163 if ((ret = do_tls_poll(h, ret)) < 0)
00164 goto fail;
00165 }
00166 #elif CONFIG_OPENSSL
00167 c->ctx = SSL_CTX_new(TLSv1_client_method());
00168 if (!c->ctx) {
00169 av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
00170 ret = AVERROR(EIO);
00171 goto fail;
00172 }
00173 c->ssl = SSL_new(c->ctx);
00174 if (!c->ssl) {
00175 av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
00176 ret = AVERROR(EIO);
00177 goto fail;
00178 }
00179 SSL_set_fd(c->ssl, c->fd);
00180 if (!numerichost)
00181 SSL_set_tlsext_host_name(c->ssl, host);
00182 while (1) {
00183 ret = SSL_connect(c->ssl);
00184 if (ret > 0)
00185 break;
00186 if (ret == 0) {
00187 av_log(h, AV_LOG_ERROR, "Unable to negotiate TLS/SSL session\n");
00188 ret = AVERROR(EIO);
00189 goto fail;
00190 }
00191 if ((ret = do_tls_poll(h, ret)) < 0)
00192 goto fail;
00193 }
00194 #endif
00195 return 0;
00196 fail:
00197 TLS_free(c);
00198 if (c->tcp)
00199 ffurl_close(c->tcp);
00200 ff_tls_deinit();
00201 return ret;
00202 }
00203
00204 static int tls_read(URLContext *h, uint8_t *buf, int size)
00205 {
00206 TLSContext *c = h->priv_data;
00207 while (1) {
00208 int ret = TLS_read(c, buf, size);
00209 if (ret > 0)
00210 return ret;
00211 if (ret == 0)
00212 return AVERROR(EIO);
00213 if ((ret = do_tls_poll(h, ret)) < 0)
00214 return ret;
00215 }
00216 return 0;
00217 }
00218
00219 static int tls_write(URLContext *h, const uint8_t *buf, int size)
00220 {
00221 TLSContext *c = h->priv_data;
00222 while (1) {
00223 int ret = TLS_write(c, buf, size);
00224 if (ret > 0)
00225 return ret;
00226 if (ret == 0)
00227 return AVERROR(EIO);
00228 if ((ret = do_tls_poll(h, ret)) < 0)
00229 return ret;
00230 }
00231 return 0;
00232 }
00233
00234 static int tls_close(URLContext *h)
00235 {
00236 TLSContext *c = h->priv_data;
00237 TLS_shutdown(c);
00238 TLS_free(c);
00239 ffurl_close(c->tcp);
00240 ff_tls_deinit();
00241 return 0;
00242 }
00243
00244 URLProtocol ff_tls_protocol = {
00245 .name = "tls",
00246 .url_open = tls_open,
00247 .url_read = tls_read,
00248 .url_write = tls_write,
00249 .url_close = tls_close,
00250 .priv_data_size = sizeof(TLSContext),
00251 };
