# phpman > man > OSSL_PROVIDER-BASE(7SSL)

[OSSL_PROVIDER-BASE(7SSL)](https://www.chedong.com/phpMan.php/man/OSSLPROVIDER-BASE/7SSL/markdown)                       OpenSSL                      [OSSL_PROVIDER-BASE(7SSL)](https://www.chedong.com/phpMan.php/man/OSSLPROVIDER-BASE/7SSL/markdown)



## NAME
       OSSL_PROVIDER-base - OpenSSL base provider

## DESCRIPTION
       The OpenSSL base provider supplies the encoding for OpenSSL's asymmetric cryptography.

### Properties
       The implementations in this provider specifically have this property defined:

       "provider=base"

       It may be used in a property query string with fetching functions.

       It isn't mandatory to query for this property, except to make sure to get implementations of
       this provider and none other.

       "type=parameters"
       "type=private"
       "type=public"

       These may be used in a property query string with fetching functions to select which data are
       to be encoded.  Either the private key material, the public key material or the domain
       parameters can be selected.

       "format=der"
       "format=pem"
       "format=text"

       These may be used in a property query string with fetching functions to select the encoding
       output format.  Either the DER, PEM and plaintext are currently permitted.

## OPERATIONS AND ALGORITHMS
       The OpenSSL base provider supports these operations and algorithms:

### Asymmetric Key Encoder
       In addition to "provider=base", some of these encoders define the property "fips=yes", to
       allow them to be used together with the FIPS provider.

       RSA, see **OSSL**___**[ENCODER-RSA**(7)](https://www.chedong.com/phpMan.php/man/ENCODER-RSA/7/markdown)
       DH, see **OSSL**___**[ENCODER-DH**(7)](https://www.chedong.com/phpMan.php/man/ENCODER-DH/7/markdown)
       DSA, see **OSSL**___**[ENCODER-DSA**(7)](https://www.chedong.com/phpMan.php/man/ENCODER-DSA/7/markdown)
       EC, see **OSSL**___**[ENCODER-EC**(7)](https://www.chedong.com/phpMan.php/man/ENCODER-EC/7/markdown)
       X25519, see **OSSL**___**[ENCODER-X25519**(7)](https://www.chedong.com/phpMan.php/man/ENCODER-X25519/7/markdown)
       X448, see **OSSL**___**[ENCODER-X448**(7)](https://www.chedong.com/phpMan.php/man/ENCODER-X448/7/markdown)

## SEE ALSO
       **OSSL**___**[PROVIDER-default**(7)](https://www.chedong.com/phpMan.php/man/PROVIDER-default/7/markdown), [**openssl-core.h**(7)](https://www.chedong.com/phpMan.php/man/openssl-core.h/7/markdown), **openssl-core**___**[dispatch.h**(7)](https://www.chedong.com/phpMan.php/man/dispatch.h/7/markdown), [**provider**(7)](https://www.chedong.com/phpMan.php/man/provider/7/markdown)

## COPYRIGHT
       Copyright 2020 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>>.



3.0.2                                        2026-06-02                     [OSSL_PROVIDER-BASE(7SSL)](https://www.chedong.com/phpMan.php/man/OSSLPROVIDER-BASE/7SSL/markdown)