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.\" ========================================================================
.\"
.IX Title "SSL_CTX_SET_CERT_STORE 3"
.TH SSL_CTX_SET_CERT_STORE 3 "2019-09-10" "1.1.1d" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
SSL_CTX_set_cert_store, SSL_CTX_set1_cert_store, SSL_CTX_get_cert_store \- manipulate X509 certificate verification storage
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_CTX_set_cert_store()\fR sets/replaces the certificate verification storage
of \fBctx\fR to/with \fBstore\fR. If another X509_STORE object is currently
set in \fBctx\fR, it will be \fBX509_STORE_free()\fRed.
.PP
\&\fBSSL_CTX_set1_cert_store()\fR sets/replaces the certificate verification storage
of \fBctx\fR to/with \fBstore\fR. The \fBstore\fR's reference count is incremented.
If another X509_STORE object is currently set in \fBctx\fR, it will be \fBX509_STORE_free()\fRed.
.PP
\&\fBSSL_CTX_get_cert_store()\fR returns a pointer to the current certificate
verification storage.
.SH "NOTES"
.IX Header "NOTES"
In order to verify the certificates presented by the peer, trusted \s-1CA\s0
certificates must be accessed. These \s-1CA\s0 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.
.PP
Typically the trusted certificate store is handled indirectly via using
\&\fBSSL_CTX_load_verify_locations\fR\|(3).
Using the \fBSSL_CTX_set_cert_store()\fR and \fBSSL_CTX_get_cert_store()\fR functions
it is possible to manipulate the X509_STORE object beyond the
\&\fBSSL_CTX_load_verify_locations\fR\|(3)
call.
.PP
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 \fBverify_callback()\fR be
overridden with the \fBverify_callback()\fR set via the
\&\fBSSL_CTX_set_verify\fR\|(3) family of functions.
This document must therefore be updated when documentation about the
X509_STORE object and its handling becomes available.
.PP
\&\fBSSL_CTX_set_cert_store()\fR does not increment the \fBstore\fR's reference
count, so it should not be used to assign an X509_STORE that is owned
by another \s-1SSL_CTX.\s0
.PP
To share X509_STOREs between two SSL_CTXs, use \fBSSL_CTX_get_cert_store()\fR
to get the X509_STORE from the first \s-1SSL_CTX,\s0 and then use
\&\fBSSL_CTX_set1_cert_store()\fR to assign to the second \s-1SSL_CTX\s0 and
increment the reference count of the X509_STORE.
.SH "RESTRICTIONS"
.IX Header "RESTRICTIONS"
The X509_STORE structure used by an \s-1SSL_CTX\s0 is used for verifying peer
certificates and building certificate chains, it is also shared by
every child \s-1SSL\s0 structure. Applications wanting finer control can use
functions such as \fBSSL_CTX_set1_verify_cert_store()\fR instead.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBSSL_CTX_set_cert_store()\fR does not return diagnostic output.
.PP
\&\fBSSL_CTX_set1_cert_store()\fR does not return diagnostic output.
.PP
\&\fBSSL_CTX_get_cert_store()\fR returns the current setting.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(7),
\&\fBSSL_CTX_load_verify_locations\fR\|(3),
\&\fBSSL_CTX_set_verify\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2001\-2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.
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