Debian Buster updated /etc/ssl/openssl.cnf to default to
MinProtocol = TLSv1.2
CipherString = DEFAULT@SECLEVEL=2
gentls_cert currently uses SHA1 as message digest. According to OpenSSL
documentation this only offers 80 bit of security. 80 bits is enough for
security level 1, but not 2.
The OpenSSL default MD nowadays is SHA256. This commit updates
gentls_cert to use it.
Issue was reported on the FS mailing list. The certificates created by
gentls_cert caused "md too weak" errors and clients were unable to
connect.
Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
Currently gentls_cert uses "@prefix@/conf/ssl". But FreeSWITCH's
configure script provides "@certsdir@", so let's use that instead.
Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
