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srtpenc,dtlsenc: Add NSS key log format logging

Browse source 
https://firefox-source-docs.mozilla.org/security/nss/legacy/key_log_format/index.html

Tested on Windows with a WebRTC Data channel captured in Wireshark
This commit is contained in:
Gerard Ryan 2022-05-16 16:45:36 +10:00 committed by Gerard Ryan
parent 64cac1ed99
commit 9188435ae6
2 changed files with 39 additions and 1 deletions
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38
subprojects/gst-plugins-bad/ext/dtls/gstdtlsconnection.c
View file

@ -28,6 +28,7 @@
#endif
#include <gst/gst.h>
#include <gio/gio.h>
#include "gstdtlsconnection.h"
@ -265,6 +266,42 @@ X509_STORE_CTX_get0_cert (X509_STORE_CTX * ctx)
}
#endif
static void
log_ssl_key (const SSL * ssl, const char *line)
{
const gchar *file;
GFileOutputStream *os;
GError *error;
if ((file = g_getenv ("SSLKEYLOGFILE")) != NULL) {
GFile *fd = g_file_parse_name (file);
error = NULL;
if ((os =
g_file_append_to (fd, G_FILE_CREATE_PRIVATE, NULL,
&error)) != NULL) {
static GMutex mutex;
error = NULL;
g_mutex_lock (&mutex);
g_output_stream_printf (G_OUTPUT_STREAM (os), NULL, NULL, &error, "%s\n",
line);
g_object_unref (os);
g_mutex_unlock (&mutex);
if (error != NULL) {
g_warning ("Could append SSL key to '%s': %s", file, error->message);
g_error_free (error);
}
} else if (error != NULL) {
g_warning ("Could not open '%s' for SSL key appending: %s", file,
error->message);
g_error_free (error);
}
g_object_unref (fd);
}
}
static void
gst_dtls_connection_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
@ -281,6 +318,7 @@ gst_dtls_connection_set_property (GObject * object, guint prop_id,
g_return_if_fail (GST_IS_DTLS_AGENT (agent));
ssl_context = _gst_dtls_agent_peek_context (agent);
SSL_CTX_set_keylog_callback (ssl_context, log_ssl_key);
priv->ssl = SSL_new (ssl_context);
g_return_if_fail (priv->ssl);

2
subprojects/gst-plugins-bad/ext/dtls/meson.build
View file

@ -21,7 +21,7 @@ if openssl_dep.found() and libcrypto_dep.found()
dtls_sources,
c_args : gst_plugins_bad_args,
include_directories : [configinc],
dependencies : [gst_dep, libcrypto_dep, openssl_dep] + winsock2,
dependencies : [gst_dep, gio_dep, libcrypto_dep, openssl_dep] + winsock2,
install : true,
install_dir : plugins_install_dir,
)