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.\" ========================================================================
.\"
.IX Title "EVP_SET_DEFAULT_PROPERTIES 3ossl"
.TH EVP_SET_DEFAULT_PROPERTIES 3ossl "2023-09-19" "3.0.11" "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"
EVP_set_default_properties, EVP_default_properties_enable_fips,
EVP_default_properties_is_fips_enabled
\&\- Set default properties for future algorithm fetches
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& int EVP_set_default_properties(OSSL_LIB_CTX *libctx, const char *propq);
\& int EVP_default_properties_enable_fips(OSSL_LIB_CTX *libctx, int enable);
\& int EVP_default_properties_is_fips_enabled(OSSL_LIB_CTX *libctx);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBEVP_set_default_properties()\fR sets the default properties for all
future \s-1EVP\s0 algorithm fetches, implicit as well as explicit. See
\&\*(L"\s-1ALGORITHM FETCHING\*(R"\s0 in \fBcrypto\fR\|(7) for information about implicit and explicit
fetching.
.PP
EVP_set_default_properties stores the properties given with the string
\&\fIpropq\fR among the \s-1EVP\s0 data that's been stored in the library context
given with \fIlibctx\fR (\s-1NULL\s0 signifies the default library context).
.PP
Any previous default property for the specified library context will
be dropped.
.PP
\&\fBEVP_default_properties_enable_fips()\fR sets the 'fips=yes' to be a default property
if \fIenable\fR is non zero, otherwise it clears 'fips' from the default property
query for the given \fIlibctx\fR. It merges the fips default property query with any
existing query strings that have been set via \fBEVP_set_default_properties()\fR.
.PP
\&\fBEVP_default_properties_is_fips_enabled()\fR indicates if 'fips=yes' is a default
property for the given \fIlibctx\fR.
.SH "NOTES"
.IX Header "NOTES"
\&\fBEVP_set_default_properties()\fR and \fBEVP_default_properties_enable_fips()\fR are not
thread safe. They are intended to be called only during the initialisation
phase of a \fIlibctx\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBEVP_set_default_properties()\fR and \fBEVP_default_properties_enable_fips()\fR return 1
on success, or 0 on failure. An error is placed on the error stack if a
failure occurs.
.PP
\&\fBEVP_default_properties_is_fips_enabled()\fR returns 1 if the 'fips=yes' default
property is set for the given \fIlibctx\fR, otherwise it returns 0.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_MD_fetch\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The functions described here were added in OpenSSL 3.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2019\-2022 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (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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