SSL_CTX_set_cert_store(3) | OpenSSL | SSL_CTX_set_cert_store(3)

# NAME

SSL_CTX_set_cert_store, SSL_CTX_set1_cert_store, SSL_CTX_get_cert_store - manipulate X509 certificate verification storage

# LIBRARY

libcrypto, -lcrypto

# 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>.

2018-09-23 | 1.1.1c