X509V3_set_ctx, X509V3_set_issuer_pkey - X.509 v3 extension generation utilities
 #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);
X509V3_set_ctx() fills in the basic fields of ctx of type
  X509V3_CTX, providing details potentially needed by functions producing
  X509 v3 extensions, e.g., to look up values for filling in authority key
  identifiers. Any of subject, req, or crl may be provided,
  pointing to a certificate, certification request, or certificate revocation
  list, respectively. 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
  to help generating an authority key identifier extension. Note that if
  subject is provided, issuer may be the same as subject,
  which means that subject is self-issued (or even self-signed).
  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 an 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 certificate that has been provided in ctx. This should be
    done for self-issued certificates (which may be self-signed or not) to
    provide fallback data for the authority key identifier extension.
X509V3_set_ctx() and X509V3_set_issuer_pkey() return 1 on success
  and 0 on error.
X509V3_set_issuer_pkey() was added in OpenSSL 3.0.
CTX_TEST was deprecated in OpenSSL 3.0; use X509V3_CTX_TEST
    instead.
Copyright 2015-2021 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>.