Fix bugs in getting certs and pass check

Fix bugs in getting certs and pass check

Password check on pkcs12 makes undefined behavior. peaking last error is
suspicious so ERR_get_error used and works well.

Parsing certificate of PEM format with TRUSTED CERTIFICATE header didn't
work. For trusted certificate case, use PEM_read_bio_X509_AUX first
because it works well on both of TRUSETD CERTIFICATE and CERTIFICATE.
Try 4 formats step by step. PEM(AUX), PEM, BASE64, DER.

Change-Id: I6d81393bc31b2e740365ae3b0b4962fd9a6e55dc
Signed-off-by: Kyungwook Tak <k.tak@samsung.com>