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=pod =head1 NAME x509 - X.509 certificate handling =head1 SYNOPSIS #include =head1 DESCRIPTION A X.509 certificate is a structured grouping of information about an individual, a device, or anything one can imagine. A X.509 CRL (certificate revocation list) is a tool to help determine if a certificate is still valid. The exact definition of those can be found in the X.509 document from ITU-T, or in RFC3280 from PKIX. In OpenSSL, the type X509 is used to express such a certificate, and the type X509_CRL is used to express a CRL. A related structure is a certificate request, defined in PKCS#10 from RSA Security, Inc, also reflected in RFC2896. In OpenSSL, the type X509_REQ is used to express such a certificate request. To handle some complex parts of a certificate, there are the types X509_NAME (to express a certificate name), X509_ATTRIBUTE (to express a certificate attributes), X509_EXTENSION (to express a certificate extension) and a few more. Finally, there's the supertype X509_INFO, which can contain a CRL, a certificate and a corresponding private key. BI<...>, BI<...> and BI<...> handle X.509 certificates, with some exceptions, shown below. BI<...>, BI<...> and BI<...> handle X.509 CRLs. BI<...>, BI<...> and BI<...> handle PKCS#10 certificate requests. BI<...> handle certificate names. BI<...> handle certificate attributes. BI<...> handle certificate extensions. =head1 SEE ALSO L, L, L, L, L, L, L, L, L, L, L, L, L =cut