X509(7) - phpMan

X509(7)                             OpenSSL                            X509(7)
NAME
       x509 - X.509 certificate handling
SYNOPSIS
        #include <openssl/x509.h>
DESCRIPTION
       An 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.
       X509_XXX, d2i_X509_XXX, and i2d_X509_XXX functions handle X.509
       certificates, with some exceptions, shown below.
       X509_CRL_XXX, d2i_X509_CRL_XXX, and i2d_X509_CRL_XXX functions handle
       X.509 CRLs.
       X509_REQ_XXX, d2i_X509_REQ_XXX, and i2d_X509_REQ_XXX functions handle
       PKCS#10 certificate requests.
       X509_NAME_XXX functions handle certificate names.
       X509_ATTRIBUTE_XXX functions handle certificate attributes.
       X509_EXTENSION_XXX functions handle certificate extensions.
SEE ALSO
       X509_NAME_ENTRY_get_object(3), X509_NAME_add_entry_by_txt(3),
       X509_NAME_add_entry_by_NID(3), X509_NAME_print_ex(3), X509_NAME_new(3),
       d2i_X509(3), d2i_X509_ALGOR(3), d2i_X509_CRL(3), d2i_X509_NAME(3),
       d2i_X509_REQ(3), d2i_X509_SIG(3), X509v3(3), crypto(7)
COPYRIGHT
       Copyright 2003-2017 The OpenSSL Project Authors. All Rights Reserved.
       Licensed under the OpenSSL license (the "License").  You may not use
       this file except in compliance with the License.  You can obtain a copy
       in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>;.
1.1.1k                            2021-03-25                           X509(7)