Documentation for this section has not yet been entered.
Returns the issuer (issuer distinguished name) as an implementation specific Principal object.
The ASN.1 definition of issuer:
java Example
  issuer      Name
  Name ::= CHOICE {
      RDNSequence }
    RDNSequence ::= SEQUENCE OF RelativeDistinguishedName
    RelativeDistinguishedName ::= SET OF AttributeTypeAndValue
    AttributeTypeAndValue ::= SEQUENCE {
      type     AttributeType,
      value    AttributeValue }
    AttributeType ::= OBJECT IDENTIFIER
    AttributeValue ::= ANY DEFINED BY AttributeType