NAME

       SSL_CTX_set_cert_store, SSL_CTX_set1_cert_store, SSL_CTX_get_cert_store - manipulate X509
       certificate verification storage

SYNOPSIS

        #include <openssl/ssl.h>

        void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store);
        void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store);
        X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx);

DESCRIPTION

       SSL_CTX_set_cert_store() sets/replaces the certificate verification storage of ctx to/with
       store. If another X509_STORE object is currently set in ctx, it will be
       X509_STORE_free()ed.

       SSL_CTX_set1_cert_store() sets/replaces the certificate verification storage of ctx
       to/with store. The store's reference count is incremented.  If another X509_STORE object
       is currently set in ctx, it will be X509_STORE_free()ed.

       SSL_CTX_get_cert_store() returns a pointer to the current certificate verification
       storage.

NOTES

       In order to verify the certificates presented by the peer, trusted CA certificates must be
       accessed. These CA certificates are made available via lookup methods, handled inside the
       X509_STORE. From the X509_STORE the X509_STORE_CTX used when verifying certificates is
       created.

       Typically the trusted certificate store is handled indirectly via using
       SSL_CTX_load_verify_locations(3).  Using the SSL_CTX_set_cert_store() and
       SSL_CTX_get_cert_store() functions it is possible to manipulate the X509_STORE object
       beyond the SSL_CTX_load_verify_locations(3) call.

       Currently no detailed documentation on how to use the X509_STORE object is available. Not
       all members of the X509_STORE are used when the verification takes place. So will e.g. the
       verify_callback() be overridden with the verify_callback() set via the
       SSL_CTX_set_verify(3) family of functions.  This document must therefore be updated when
       documentation about the X509_STORE object and its handling becomes available.

       SSL_CTX_set_cert_store() does not increment the store's reference count, so it should not
       be used to assign an X509_STORE that is owned by another SSL_CTX.

       To share X509_STOREs between two SSL_CTXs, use SSL_CTX_get_cert_store() to get the
       X509_STORE from the first SSL_CTX, and then use SSL_CTX_set1_cert_store() to assign to the
       second SSL_CTX and increment the reference count of the X509_STORE.

RESTRICTIONS

       The X509_STORE structure used by an SSL_CTX is used for verifying peer certificates and
       building certificate chains, it is also shared by every child SSL structure. Applications
       wanting finer control can use functions such as SSL_CTX_set1_verify_cert_store() instead.

RETURN VALUES

       SSL_CTX_set_cert_store() does not return diagnostic output.

       SSL_CTX_set1_cert_store() does not return diagnostic output.

       SSL_CTX_get_cert_store() returns the current setting.

SEE ALSO

       ssl(7), SSL_CTX_load_verify_locations(3), SSL_CTX_set_verify(3)

COPYRIGHT

       Copyright 2001-2016 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>.