certificate – What is a Pem file and how does it differ from other OpenSSL Generated Key File Formats? – Server Fault
Posted by jpluimers on 2016/08/29
The canonical answer on extensions and formats like csr, pem, key, pkcs12, pfx, p12, der, cet, cer, crt, p7b, crl, PEM, PKCS7, PKCS12, PKCS10, DER, text, binary, ASN1: certificate – What is a Pem file and how does it differ from other OpenSSL Generated Key File Formats? – Server Fault.
Oh and it contains some openssl conversion tips as well, though this link has more: DER vs. CRT vs. CER vs. PEM Certificates and How To Convert Them.
–jeroen






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