X509V3_set_ctx, X509V3_set_issuer_pkey - X.509 v3 extension generation utilities

       Copyright 2015-2025 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (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>.

3.5.0                                              2025-06-04                               X509V3_SET_CTX(3SSL)

X509V3_set_ctx() fills in the basic fields of ctx of type X509V3_CTX, providing details potentially
       needed by functions producing X509 v3 extensions.  These may make use of fields of the certificate
       subject, the certification request req, or the certificate revocation list crl.  At most one of these
       three parameters can be non-NULL.  When constructing the subject key identifier of a certificate by
       computing a hash value of its public key, the public key is taken from subject or req.  Similarly, when
       constructing subject alternative names from any email addresses contained in a subject DN, the subject DN
       is taken from subject or req.  If subject or crl is provided, issuer should point to its issuer, for
       instance as a reference for generating the authority key identifier extension.  issuer may be the same
       pointer value as subject (which usually is an indication that the subject certificate is self-issued or
       even self-signed).  In this case the fallback source for generating the authority key identifier
       extension will be taken from any value provided using X509V3_set_issuer_pkey().  flags may be 0 or
       contain X509V3_CTX_TEST, which means that just the syntax of extension definitions is to be checked
       without actually producing any extension, or X509V3_CTX_REPLACE, which means that each X.509v3 extension
       added as defined in some configuration section shall replace any already existing extension with the same
       OID.

       X509V3_set_issuer_pkey() explicitly sets the issuer private key of the subject certificate that has been
       provided in ctx.  This should be done in case the issuer and subject arguments to X509V3_set_ctx() have
       the same pointer value to provide fallback data for the authority key identifier extension.

X509V3_set_issuer_pkey() was added in OpenSSL 3.0.

       CTX_TEST was deprecated in OpenSSL 3.0; use X509V3_CTX_TEST instead.

       X509V3_set_ctx, X509V3_set_issuer_pkey - X.509 v3 extension generation utilities

X509V3_set_issuer_pkey() returns 1 on success and 0 on error.

X509_add_ext(3)

        #include <openssl/x509v3.h>

        void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subject,
                            X509_REQ *req, X509_CRL *crl, int flags);
        int X509V3_set_issuer_pkey(X509V3_CTX *ctx, EVP_PKEY *pkey);