11590Srgrimes=pod
21590Srgrimes
31590Srgrimes=head1 NAME
41590Srgrimes
51590Srgrimesx509 - X.509 certificate handling
61590Srgrimes
71590Srgrimes=head1 SYNOPSIS
81590Srgrimes
91590Srgrimes #include <openssl/x509.h>
101590Srgrimes
111590Srgrimes=head1 DESCRIPTION
121590Srgrimes
131590SrgrimesA X.509 certificate is a structured grouping of information about
141590Srgrimesan individual, a device, or anything one can imagine.  A X.509 CRL
151590Srgrimes(certificate revocation list) is a tool to help determine if a
161590Srgrimescertificate is still valid.  The exact definition of those can be
171590Srgrimesfound in the X.509 document from ITU-T, or in RFC3280 from PKIX.
181590SrgrimesIn OpenSSL, the type X509 is used to express such a certificate, and
191590Srgrimesthe type X509_CRL is used to express a CRL.
201590Srgrimes
211590SrgrimesA related structure is a certificate request, defined in PKCS#10 from
221590SrgrimesRSA Security, Inc, also reflected in RFC2896.  In OpenSSL, the type
231590SrgrimesX509_REQ is used to express such a certificate request.
241590Srgrimes
251590SrgrimesTo handle some complex parts of a certificate, there are the types
261590SrgrimesX509_NAME (to express a certificate name), X509_ATTRIBUTE (to express
271590Srgrimesa certificate attributes), X509_EXTENSION (to express a certificate
281590Srgrimesextension) and a few more.
291590Srgrimes
301590SrgrimesFinally, there's the supertype X509_INFO, which can contain a CRL, a
311590Srgrimescertificate and a corresponding private key.
321590Srgrimes
331590SrgrimesB<X509_>I<...>, B<d2i_X509_>I<...> and B<i2d_X509_>I<...> handle X.509
341590Srgrimescertificates, with some exceptions, shown below.
351590Srgrimes
361590SrgrimesB<X509_CRL_>I<...>, B<d2i_X509_CRL_>I<...> and B<i2d_X509_CRL_>I<...>
3758407Sgreenhandle X.509 CRLs.
3858307Sgreen
391590SrgrimesB<X509_REQ_>I<...>, B<d2i_X509_REQ_>I<...> and B<i2d_X509_REQ_>I<...>
401590Srgrimeshandle PKCS#10 certificate requests.
411590Srgrimes
421590SrgrimesB<X509_NAME_>I<...> handle certificate names.
431590Srgrimes
441590SrgrimesB<X509_ATTRIBUTE_>I<...> handle certificate attributes.
451590Srgrimes
461590SrgrimesB<X509_EXTENSION_>I<...> handle certificate extensions.
471590Srgrimes
481590Srgrimes=head1 SEE ALSO
4987766Smarkm
5058407SgreenL<X509_NAME_ENTRY_get_object(3)|X509_NAME_ENTRY_get_object(3)>,
511590SrgrimesL<X509_NAME_add_entry_by_txt(3)|X509_NAME_add_entry_by_txt(3)>,
5292922SimpL<X509_NAME_add_entry_by_NID(3)|X509_NAME_add_entry_by_NID(3)>,
5392922SimpL<X509_NAME_print_ex(3)|X509_NAME_print_ex(3)>,
5492922SimpL<X509_NAME_new(3)|X509_NAME_new(3)>,
5592922SimpL<d2i_X509(3)|d2i_X509(3)>,
5692922SimpL<d2i_X509_ALGOR(3)|d2i_X509_ALGOR(3)>,
5792922SimpL<d2i_X509_CRL(3)|d2i_X509_CRL(3)>,
5892922SimpL<d2i_X509_NAME(3)|d2i_X509_NAME(3)>,
59L<d2i_X509_REQ(3)|d2i_X509_REQ(3)>,
60L<d2i_X509_SIG(3)|d2i_X509_SIG(3)>,
61L<crypto(3)|crypto(3)>,
62L<x509v3(3)|x509v3(3)>
63
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