Updated: 2022/Sep/29

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EVP_set_default_properties(3)       OpenSSL      EVP_set_default_properties(3)



NAME
       EVP_set_default_properties, EVP_default_properties_enable_fips,
       EVP_default_properties_is_fips_enabled - Set default properties for
       future algorithm fetches

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #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);

DESCRIPTION
       EVP_set_default_properties() sets the default properties for all future
       EVP algorithm fetches, implicit as well as explicit. See "ALGORITHM
       FETCHING" in crypto(7) for information about implicit and explicit
       fetching.

       EVP_set_default_properties stores the properties given with the string
       propq among the EVP data that's been stored in the library context
       given with libctx (NULL signifies the default library context).

       Any previous default property for the specified library context will be
       dropped.

       EVP_default_properties_enable_fips() sets the 'fips=yes' to be a
       default property if enable is non zero, otherwise it clears 'fips' from
       the default property query for the given libctx. It merges the fips
       default property query with any existing query strings that have been
       set via EVP_set_default_properties().

       EVP_default_properties_is_fips_enabled() indicates if 'fips=yes' is a
       default property for the given libctx.

NOTES
       EVP_set_default_properties() and  EVP_default_properties_enable_fips()
       are not thread safe. They are intended to be called only during the
       initialisation phase of a libctx.

RETURN VALUES
       EVP_set_default_properties() and  EVP_default_properties_enable_fips()
       return 1 on success, or 0 on failure. An error is placed on the error
       stack if a failure occurs.

       EVP_default_properties_is_fips_enabled() returns 1 if the 'fips=yes'
       default property is set for the given libctx, otherwise it returns 0.

SEE ALSO
       EVP_MD_fetch(3)

HISTORY
       The functions described here were added in OpenSSL 3.0.

COPYRIGHT
       Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (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>.



3.0.12                            2023-05-07     EVP_set_default_properties(3)