returns the SHA-1 hash fingerprint of the certificate.
-.vitem &*${sha256:*&<&'string'&>&*}*&
-.vitem &*${sha2:*&<&'string'&>&*}*& &&&
+.vitem &*${sha256:*&<&'string'&>&*}*& &&&
+ &*${sha2:*&<&'string'&>&*}*& &&&
&*${sha2_<n>:*&<&'string'&>&*}*&
.cindex "SHA-256 hash"
.cindex "SHA-2 hash"