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6cd17fd556
For outgoing calls send AES crypto in offer using corrected names
for keys of length 192 and 256, i.e. names containing _192_CM_
and _256_CM_ instead of _CM_192_ and CM_256_. For incoming calls
accept both naming conventions, decaying to same entry in SUITES.
+ fix after SRTP failed for 256 keys:
Tests showed loop removing '=' from keys in switch_core_media_build_crypto
1190 if (!switch_channel_var_true(channel, "rtp_pad_srtp_keys")) {
1191 p = strrchr((char *) b64_key, '=');
1192
1193 while (p && *p && *p == '=') {
1194 *p-- = '\0';
1195 }
1196 }
shouldn't be executed for AES_CM_256_HMAC_SHA1_32 and AES_CM_256_HMAC_SHA1_80
keys and it is meaningless for AES_CM_128_HMAC_SHA1_32 AES_CM_128_HMAC_SHA1_80
keys. Tested calling from Bria.
Introduced switch_channel_var_false and changed this to:
if (switch_channel_var_false(channel, "rtp_pad_srtp_keys"))
to enter the loop if var is set to false (and not if it is _not_ set).