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sdp: gstmikey: gst_mikey_message_to_caps: extract salt and append to srtp-key

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A KEMAC can hold both key and salt, so if salt is present, we should extract it
and append it to the srtp-key cap because libsrtp expects the srtp-key to hold
the concantenated srtp master key and salt.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3568>
This commit is contained in:
Bart Van Severen 2022-12-14 10:31:14 +01:00 committed by GStreamer Marge Bot
parent 5678151799
commit a62b07f3b4
1 changed files with 6 additions and 1 deletions
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7
subprojects/gst-plugins-base/gst-libs/gst/sdp/gstmikey.c
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@ -2489,7 +2489,7 @@ gst_mikey_message_to_caps (const GstMIKEYMessage * msg, GstCaps * caps)
GstMIKEYPayloadKEMAC *p = (GstMIKEYPayloadKEMAC *) payload;
const GstMIKEYPayload *sub;
GstMIKEYPayloadKeyData *pkd;
GstBuffer *buf;
GstBuffer *buf, *saltbuf;
if (p->enc_alg != GST_MIKEY_ENC_NULL || p->mac_alg != GST_MIKEY_MAC_NULL)
goto done;
@ -2502,6 +2502,11 @@ gst_mikey_message_to_caps (const GstMIKEYMessage * msg, GstCaps * caps)
pkd = (GstMIKEYPayloadKeyData *) sub;
buf = gst_buffer_new_memdup (pkd->key_data, pkd->key_len);
if (pkd->salt_len) {
saltbuf = gst_buffer_new_memdup (pkd->salt_data, pkd->salt_len);
gst_buffer_append (buf, saltbuf);
gst_buffer_unref (saltbuf);
}
gst_caps_set_simple (caps, "srtp-key", GST_TYPE_BUFFER, buf, NULL);
gst_buffer_unref (buf);