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srtp-utils: Add implicit padding characters explicitly

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Otherwise base64 decoding will give us a wrong key.
This commit is contained in:
Дилян Палаузов 2023-02-11 21:42:21 +02:00 committed by Evangelos Ribeiro Tzaras
parent cfd371d72e
commit 3db2c5dbb9
1 changed files with 14 additions and 1 deletions
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15
plugins/provider/sip/calls-srtp-utils.c
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@ -405,7 +405,20 @@ calls_srtp_parse_sdp_crypto_attribute (const char *attribute,
n_key_infos = g_strv_length (key_info_fields);
key_param->b64_keysalt = g_strdup (key_info_fields[0]);
switch (strlen (key_info_fields[0]) % 4) {
case 3:
key_param->b64_keysalt = g_strconcat (key_info_fields[0], "=", NULL);
break;
case 2:
key_param->b64_keysalt = g_strconcat (key_info_fields[0], "==", NULL);
break;
case 1:
g_assert_not_reached (); /* impossible with base64 */
break;
case 0:
default:
key_param->b64_keysalt = g_strdup (key_info_fields[0]);
}
if (n_key_infos == 1) {
key_info_lifetime_index = 0;