NAME
SSL_CTX_add_extra_chain_cert,
SSL_CTX_get_extra_chain_certs,
SSL_CTX_clear_extra_chain_certs —
add, retrieve, and clear extra chain
certificates
SYNOPSIS
#include
<openssl/ssl.h>
long
SSL_CTX_add_extra_chain_cert(SSL_CTX
*ctx, X509
*x509);
long
SSL_CTX_get_extra_chain_certs(SSL_CTX
*ctx, STACK_OF(X509)
**certs);
long
SSL_CTX_clear_extra_chain_certs(SSL_CTX
*ctx);
DESCRIPTION
SSL_CTX_add_extra_chain_cert()
adds the certificate x509 to the extra chain
certificates associated with ctx. Several certificates
can be added one after another.
SSL_CTX_get_extra_chain_certs()
retrieves an internal pointer to the stack of extra chain certificates
associated with ctx.
SSL_CTX_clear_extra_chain_certs()
clears all extra chain certificates associated with
ctx.
These functions are implemented as macros.
When sending a certificate chain, extra chain certificates are sent in order following the end entity certificate.
If no chain is specified, the library will try to complete the chain from the available CA certificates in the trusted CA storage, see SSL_CTX_load_verify_locations(3).
The x509 certificate provided
to
SSL_CTX_add_extra_chain_cert()
will be freed by the library when the SSL_CTX is
destroyed. An application should not free the x509
object, nor the *certs object retrieved by
SSL_CTX_get_extra_chain_certs().
RETURN VALUES
These functions return 1 on success or 0 for failure. Check out the error stack to find out the reason for failure.
SEE ALSO
ssl(3), SSL_CTX_add1_chain_cert(3), SSL_CTX_ctrl(3), SSL_CTX_load_verify_locations(3), SSL_CTX_set_client_cert_cb(3), SSL_CTX_use_certificate(3)
HISTORY
SSL_CTX_add_extra_chain_cert() first
appeared in SSLeay 0.9.1 and has been available since
OpenBSD 2.6.
SSL_CTX_get_extra_chain_certs() and
SSL_CTX_clear_extra_chain_certs() first appeared in
OpenSSL 1.0.1 and have been available since OpenBSD
5.3.
CAVEATS
Certificates added with
SSL_CTX_add_extra_chain_cert() are ignored when
certificates are also available that have been added using the functions
documented in
SSL_CTX_set1_chain(3).
Only one set of extra chain certificates can be specified per
SSL_CTX structure using
SSL_CTX_add_extra_chain_cert(). Different chains for
different certificates (for example if both RSA and DSA certificates are
specified by the same server) or different SSL structures with the same
parent SSL_CTX require using the functions documented
in
SSL_CTX_set1_chain(3) instead.