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mikey: add new function gst_mikey_message_to_caps

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This commit is contained in:
Aleix Conchillo Flaqué 2016-04-14 23:29:34 -07:00 committed by Josep Torra
parent d1ecd3cfa7
commit 7a864c177f
3 changed files with 139 additions and 120 deletions
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136
gst-libs/gst/sdp/gstmikey.c
View file

@ -2299,6 +2299,142 @@ no_key:
return NULL;
}
#define AES_128_KEY_LEN 16
#define AES_256_KEY_LEN 32
#define HMAC_32_KEY_LEN 4
#define HMAC_80_KEY_LEN 10
/**
* gst_mikey_message_to_caps:
* @msg: a #GstMIKEYMessage
* @caps: a #GstCaps to be filled with SRTP parameters (srtp/srtcp cipher, authorization, key data)
*
* Returns: %TRUE on success
*
* Since: 1.10
*/
gboolean
gst_mikey_message_to_caps (const GstMIKEYMessage * msg, GstCaps * caps)
{
gboolean res = FALSE;
const GstMIKEYPayload *payload;
const gchar *srtp_cipher;
const gchar *srtp_auth;
srtp_cipher = "aes-128-icm";
srtp_auth = "hmac-sha1-80";
/* check the Security policy if any */
if ((payload = gst_mikey_message_find_payload (msg, GST_MIKEY_PT_SP, 0))) {
GstMIKEYPayloadSP *p = (GstMIKEYPayloadSP *) payload;
guint len, i;
if (p->proto != GST_MIKEY_SEC_PROTO_SRTP)
goto done;
len = gst_mikey_payload_sp_get_n_params (payload);
for (i = 0; i < len; i++) {
const GstMIKEYPayloadSPParam *param =
gst_mikey_payload_sp_get_param (payload, i);
switch (param->type) {
case GST_MIKEY_SP_SRTP_ENC_ALG:
switch (param->val[0]) {
case 0:
srtp_cipher = "null";
break;
case 2:
case 1:
srtp_cipher = "aes-128-icm";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_ENC_KEY_LEN:
switch (param->val[0]) {
case AES_128_KEY_LEN:
srtp_cipher = "aes-128-icm";
break;
case AES_256_KEY_LEN:
srtp_cipher = "aes-256-icm";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_AUTH_ALG:
switch (param->val[0]) {
case 0:
srtp_auth = "null";
break;
case 2:
case 1:
srtp_auth = "hmac-sha1-80";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_AUTH_KEY_LEN:
switch (param->val[0]) {
case HMAC_32_KEY_LEN:
srtp_auth = "hmac-sha1-32";
break;
case HMAC_80_KEY_LEN:
srtp_auth = "hmac-sha1-80";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_SRTP_ENC:
break;
case GST_MIKEY_SP_SRTP_SRTCP_ENC:
break;
default:
break;
}
}
}
if (!(payload = gst_mikey_message_find_payload (msg, GST_MIKEY_PT_KEMAC, 0)))
goto done;
else {
GstMIKEYPayloadKEMAC *p = (GstMIKEYPayloadKEMAC *) payload;
const GstMIKEYPayload *sub;
GstMIKEYPayloadKeyData *pkd;
GstBuffer *buf;
if (p->enc_alg != GST_MIKEY_ENC_NULL || p->mac_alg != GST_MIKEY_MAC_NULL)
goto done;
if (!(sub = gst_mikey_payload_kemac_get_sub (payload, 0)))
goto done;
if (sub->type != GST_MIKEY_PT_KEY_DATA)
goto done;
pkd = (GstMIKEYPayloadKeyData *) sub;
buf =
gst_buffer_new_wrapped (g_memdup (pkd->key_data, pkd->key_len),
pkd->key_len);
gst_caps_set_simple (caps, "srtp-key", GST_TYPE_BUFFER, buf, NULL);
gst_buffer_unref (buf);
}
gst_caps_set_simple (caps,
"srtp-cipher", G_TYPE_STRING, srtp_cipher,
"srtp-auth", G_TYPE_STRING, srtp_auth,
"srtcp-cipher", G_TYPE_STRING, srtp_cipher,
"srtcp-auth", G_TYPE_STRING, srtp_auth, NULL);
res = TRUE;
done:
return res;
}
/**
* gst_mikey_message_base64_encode:
* @msg: a #GstMIKEYMessage

4
gst-libs/gst/sdp/gstmikey.h
View file

@ -547,7 +547,8 @@ GstMIKEYMessage * gst_mikey_message_new_from_bytes (GBytes *bytes,
GError **error);
GBytes * gst_mikey_message_to_bytes (GstMIKEYMessage *msg, GstMIKEYEncryptInfo *info,
GError **error);
GstMIKEYMessage * gst_mikey_message_new_from_caps (GstCaps *caps);
GstMIKEYMessage * gst_mikey_message_new_from_caps (GstCaps *caps);
gboolean gst_mikey_message_to_caps (const GstMIKEYMessage *msg, GstCaps *caps);
gchar * gst_mikey_message_base64_encode (GstMIKEYMessage* msg);
/**
@ -665,4 +666,3 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstMIKEYPayload, gst_mikey_payload_unref)
G_END_DECLS
#endif /* __GST_MIKEY_H__ */

119
gst-libs/gst/sdp/gstsdpmessage.c
View file

@ -3619,11 +3619,6 @@ gst_sdp_make_keymgmt (const gchar * uri, const gchar * base64)
return g_strdup_printf ("prot=mikey;uri=\"%s\";data=\"%s\"", uri, base64);
}
#define AES_128_KEY_LEN 16
#define AES_256_KEY_LEN 32
#define HMAC_32_KEY_LEN 4
#define HMAC_80_KEY_LEN 10
static gboolean
gst_sdp_parse_keymgmt (const gchar * keymgmt, GstCaps * caps)
{
@ -3631,9 +3626,6 @@ gst_sdp_parse_keymgmt (const gchar * keymgmt, GstCaps * caps)
gsize size;
guchar *data;
GstMIKEYMessage *msg;
const GstMIKEYPayload *payload;
const gchar *srtp_cipher;
const gchar *srtp_auth;
gchar *orig_value;
gchar *p, *kmpid;
@ -3661,116 +3653,7 @@ gst_sdp_parse_keymgmt (const gchar * keymgmt, GstCaps * caps)
if (msg == NULL)
return FALSE;
srtp_cipher = "aes-128-icm";
srtp_auth = "hmac-sha1-80";
/* check the Security policy if any */
if ((payload = gst_mikey_message_find_payload (msg, GST_MIKEY_PT_SP, 0))) {
GstMIKEYPayloadSP *p = (GstMIKEYPayloadSP *) payload;
guint len, i;
if (p->proto != GST_MIKEY_SEC_PROTO_SRTP)
goto done;
len = gst_mikey_payload_sp_get_n_params (payload);
for (i = 0; i < len; i++) {
const GstMIKEYPayloadSPParam *param =
gst_mikey_payload_sp_get_param (payload, i);
switch (param->type) {
case GST_MIKEY_SP_SRTP_ENC_ALG:
switch (param->val[0]) {
case 0:
srtp_cipher = "null";
break;
case 2:
case 1:
srtp_cipher = "aes-128-icm";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_ENC_KEY_LEN:
switch (param->val[0]) {
case AES_128_KEY_LEN:
srtp_cipher = "aes-128-icm";
break;
case AES_256_KEY_LEN:
srtp_cipher = "aes-256-icm";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_AUTH_ALG:
switch (param->val[0]) {
case 0:
srtp_auth = "null";
break;
case 2:
case 1:
srtp_auth = "hmac-sha1-80";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_AUTH_KEY_LEN:
switch (param->val[0]) {
case HMAC_32_KEY_LEN:
srtp_auth = "hmac-sha1-32";
break;
case HMAC_80_KEY_LEN:
srtp_auth = "hmac-sha1-80";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_SRTP_ENC:
break;
case GST_MIKEY_SP_SRTP_SRTCP_ENC:
break;
default:
break;
}
}
}
if (!(payload = gst_mikey_message_find_payload (msg, GST_MIKEY_PT_KEMAC, 0)))
goto done;
else {
GstMIKEYPayloadKEMAC *p = (GstMIKEYPayloadKEMAC *) payload;
const GstMIKEYPayload *sub;
GstMIKEYPayloadKeyData *pkd;
GstBuffer *buf;
if (p->enc_alg != GST_MIKEY_ENC_NULL || p->mac_alg != GST_MIKEY_MAC_NULL)
goto done;
if (!(sub = gst_mikey_payload_kemac_get_sub (payload, 0)))
goto done;
if (sub->type != GST_MIKEY_PT_KEY_DATA)
goto done;
pkd = (GstMIKEYPayloadKeyData *) sub;
buf =
gst_buffer_new_wrapped (g_memdup (pkd->key_data, pkd->key_len),
pkd->key_len);
gst_caps_set_simple (caps, "srtp-key", GST_TYPE_BUFFER, buf, NULL);
gst_buffer_unref (buf);
}
gst_caps_set_simple (caps,
"srtp-cipher", G_TYPE_STRING, srtp_cipher,
"srtp-auth", G_TYPE_STRING, srtp_auth,
"srtcp-cipher", G_TYPE_STRING, srtp_cipher,
"srtcp-auth", G_TYPE_STRING, srtp_auth, NULL);
res = TRUE;
done:
res = gst_mikey_message_to_caps (msg, caps);
gst_mikey_message_unref (msg);
return res;