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X509_check_issued(3)                OpenSSL               X509_check_issued(3)



NAME
       X509_check_issued - checks if certificate is issued by another
       certificate

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/x509v3.h>

        int X509_check_issued(X509 *issuer, X509 *subject);

DESCRIPTION
       This function checks if certificate subject was issued using CA
       certificate issuer. This function takes into account not only matching
       of issuer field of subject with subject field of issuer, but also
       compares authorityKeyIdentifier extension of subject with
       subjectKeyIdentifier of issuer if authorityKeyIdentifier present in the
       subject certificate and checks keyUsage field of issuer.

RETURN VALUES
       Function return X509_V_OK if certificate subject is issued by issuer or
       some X509_V_ERR* constant to indicate an error.

SEE ALSO
       X509_verify_cert(3), X509_check_ca(3), openssl_verify(1)

COPYRIGHT
       Copyright 2015-2018 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>.



1.1.1                             2018-09-17              X509_check_issued(3)