[FFmpeg-devel] [PATCH] avformat/rtsp: add TLS options

[Marvin Scholz]

From: Daniel N Pettersson <danielnp at axis.com>

Add TLS options to RTSP for when TLS is used for the lower protocol.

Signed-off-by: Marvin Scholz <epirat07 at gmail.com>
Co-authored-by: Marvin Scholz <epirat07 at gmail.com>
---
 libavformat/rtsp.c | 30 +++++++++++++++++++++++++++++-
 libavformat/rtsp.h |  9 +++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 5ea471b40c..afa0528626 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -103,6 +103,14 @@ const AVOption ff_rtsp_options[] = {
     { "timeout", "set timeout (in microseconds) of socket I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT64, {.i64 = 0}, INT_MIN, INT64_MAX, DEC },
     COMMON_OPTS(),
     { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
+
+    // TLS options
+    { "ca_file", "Certificate Authority database file", OFFSET(tls_ca_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC|ENC },
+    { "cafile", "Certificate Authority database file", OFFSET(tls_ca_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC|ENC },
+    { "tls_verify", "Verify the peer certificate", OFFSET(tls_verify), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC|ENC},
+    { "cert_file", "Certificate file", OFFSET(tls_cert_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC|ENC },
+    { "key_file", "Private key file", OFFSET(tls_key_file),  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC|ENC },
+    { "verifyhost", "Verify against a specific hostname", OFFSET(tls_host),  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC|ENC },
     { NULL },
 };
 
@@ -139,6 +147,18 @@ static AVDictionary *map_to_opts(RTSPState *rt)
     return opts;
 }
 
+/**
+ * Add the TLS options of the given RTSPState to the dict
+ */
+static void copy_tls_opts_dict(RTSPState *rt, AVDictionary **dict)
+{
+    av_dict_set_int(dict, "tls_verify", rt->tls_verify, 0);
+    av_dict_set(dict, "ca_file", rt->tls_ca_file, 0);
+    av_dict_set(dict, "cert_file", rt->tls_cert_file, 0);
+    av_dict_set(dict, "key_file", rt->tls_key_file, 0);
+    av_dict_set(dict, "verifyhost", rt->tls_host, 0);
+}
+
 static void get_word_until_chars(char *buf, int buf_size,
                                  const char *sep, const char **pp)
 {
@@ -1814,6 +1834,8 @@ redirect:
         AVDictionary *options = NULL;
 
         av_dict_set_int(&options, "timeout", rt->stimeout, 0);
+        if (https_tunnel)
+            copy_tls_opts_dict(rt, &options);
 
         ff_url_join(httpname, sizeof(httpname), https_tunnel ? "https" : "http", auth, host, port, "%s", path);
         snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
@@ -1898,14 +1920,20 @@ redirect:
     } else {
         int ret;
         /* open the tcp connection */
+        AVDictionary *proto_opts = NULL;
+        if (strcmp("tls", lower_rtsp_proto) == 0)
+            copy_tls_opts_dict(rt, &proto_opts);
+
         ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
                     host, port,
                     "?timeout=%"PRId64, rt->stimeout);
         if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
-                       &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
+                       &s->interrupt_callback, &proto_opts, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
+            av_dict_free(&proto_opts);
             err = ret;
             goto fail;
         }
+        av_dict_free(&proto_opts);
         rt->rtsp_hd_out = rt->rtsp_hd;
     }
     rt->seq = 0;
diff --git a/libavformat/rtsp.h b/libavformat/rtsp.h
index 83b2e3f4fb..114629f249 100644
--- a/libavformat/rtsp.h
+++ b/libavformat/rtsp.h
@@ -419,6 +419,15 @@ typedef struct RTSPState {
     int buffer_size;
     int pkt_size;
     char *localaddr;
+
+    /** The following are used for TLS based RTSP streams. */
+    //@{
+    char *tls_ca_file;
+    int tls_verify;
+    char *tls_cert_file;
+    char *tls_key_file;
+    char *tls_host;
+    //@}
 } RTSPState;
 
 #define RTSP_FLAG_FILTER_SRC  0x1    /**< Filter incoming UDP packets -
-- 
2.39.5 (Apple Git-154)