Long: cert-type
Protocols: TLS
Arg: <type>
Help: Certificate type (DER/PEM/ENG/P12)
See-also: cert key key-type
Category: tls
Example: --cert-type PEM --cert file $URL
Added: 7.9.3
---
Tells curl what type the provided client certificate is using. PEM, DER, ENG
and P12 are recognized types.

The default type depends on the TLS backend and is usually PEM, however for
Secure Transport and Schannel it is P12. If --cert is a pkcs11: URI then ENG is
the default type.

If this option is used several times, the last one will be used.