NAME

       OSSL_PROVIDER-legacy - OpenSSL legacy provider

DESCRIPTION

       The OpenSSL legacy provider supplies OpenSSL implementations of algorithms that have been deemed legacy.
       Such algorithms have commonly fallen out of use, have been deemed insecure by the cryptography community,
       or something similar.

       We can consider this the retirement home of cryptographic algorithms.

   Properties
       The implementations in this provider specifically has this property defined:

       "provider=legacy"

       It  may  be  used  in  a  property  query  string  with  fetching  functions  such  as EVP_MD_fetch(3) or
       EVP_CIPHER_fetch(3), as well as with  other  functions  that  take  a  property  query  string,  such  as
       EVP_PKEY_CTX_new_from_name(3).

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

OPERATIONS AND ALGORITHMS

       The OpenSSL legacy provider supports these operations and algorithms:

   Hashing Algorithms / Message Digests
       MD2, see EVP_MD-MD2(7)
           Disabled by default. Use enable-md2 config option to enable.

       MD4, see EVP_MD-MD4(7)
       MDC2, see EVP_MD-MDC2(7)
       WHIRLPOOL, see EVP_MD-WHIRLPOOL(7)
       RIPEMD160, see EVP_MD-RIPEMD160(7)

   Symmetric Ciphers
       Not all of these symmetric cipher algorithms are enabled by default.

       Blowfish, see EVP_CIPHER-BLOWFISH(7)
       CAST, see EVP_CIPHER-CAST(7)
       DES, see EVP_CIPHER-DES(7)
           The algorithm names are: DES_ECB, DES_CBC, DES_OFB, DES_CFB, DES_CFB1, DES_CFB8 and DESX_CBC.

       IDEA, see EVP_CIPHER-IDEA(7)
       RC2, see EVP_CIPHER-RC2(7)
       RC4, see EVP_CIPHER-RC4(7)
       RC5, see EVP_CIPHER-RC5(7)
           Disabled by default. Use enable-rc5 config option to enable.

       SEED, see EVP_CIPHER-SEED(7)

   Key Derivation Function (KDF)
       PBKDF1
       PVKKDF

SEE ALSO

       OSSL_PARAM(3), openssl-core.h(7), openssl-core_dispatch.h(7), provider(7)

HISTORY

       This functionality was added in OpenSSL 3.0.

COPYRIGHT

       Copyright 2020-2021 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>.

3.3.1                                              2025-02-05                         OSSL_PROVIDER-LEGACY(7SSL)