openssl/doc/crypto/X509_check_issued.pod
Rich Salz c03726ca41 Various doc fixes.
Make all mention of digest algorithm use "any supported algorithm"

RT2071, some new manpages from Victor B. Wagner <vitus@cryptocom.ru>:
    X509_LOOKUP_hash_dir.pod
    X509_check_ca.pod
    X509_check_issued.pod

RT 1600:
    Remove references to non-existant objects(3)
    Add RETURN VALUES to BIO_do_accept page.

RT1818:
    RSA_sign Can return values other than 0 on failure.

RT3634:
    Fix AES CBC aliases (Steffen Nurpmeso <sdaoden@yandex.com>)

RT3678:
    Some clarifications to BIO_new_pair
    (Devchandra L Meetei <dlmeetei@gmail.com>)

RT3787:
    Fix some EVP_ function return values
    (Laetitia Baudoin <lbaudoin@google.com>)

Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-08-27 14:27:28 -04:00

37 lines
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=pod
=head1 NAME
X509_check_issued - checks if certificate is issued by another
certificate
=head1 SYNOPSIS
#include <openssl/x509v3.h>
int X509_check_issued(X509 *issuer, X509 *subject);
=head1 DESCRIPTION
This function checks if certificate I<subject> was issued using CA
certificate I<issuer>. This function takes into account not only
matching of issuer field of I<subject> with subject field of I<issuer>,
but also compares B<authorityKeyIdentifier> extension of I<subject> with
B<subjectKeyIdentifier> of I<issuer> if B<authorityKeyIdentifier>
present in the I<subject> certificate and checks B<keyUsage> field of
I<issuer>.
=head1 RETURN VALUE
Function return B<X509_V_OK> if certificate I<subject> is issued by
I<issuer> or some B<X509_V_ERR*> constant to indicate an error.
=head1 SEE ALSO
L<X509_verify_cert(3)>,
L<X509_check_ca(3)>,
L<verify(1)>
=cut