5 OSSL_PROVIDER-legacy - OpenSSL legacy provider
9 The OpenSSL legacy provider supplies OpenSSL implementations of algorithms
10 that have been deemed legacy. Such algorithms have commonly fallen out of
11 use, have been deemed insecure by the cryptography community, or something
14 We can consider this the retirement home of cryptographic algorithms.
18 The implementations in this provider specifically has this property
23 =item "provider=legacy"
27 It may be used in a property query string with fetching functions such as
28 L<EVP_MD_fetch(3)> or L<EVP_CIPHER_fetch(3)>, as well as with other
29 functions that take a property query string, such as
30 L<EVP_PKEY_CTX_new_from_name(3)>.
32 It isn't mandatory to query for any of these properties, except to
33 make sure to get implementations of this provider and none other.
35 =head1 OPERATIONS AND ALGORITHMS
37 The OpenSSL legacy provider supports these operations and algorithms:
39 =head2 Hashing Algorithms / Message Digests
43 =item MD2, see L<EVP_MD-MD2(7)>
45 =item MD4, see L<EVP_MD-MD4(7)>
47 =item MDC2, see L<EVP_MD-MDC2(7)>
49 =item WHIRLPOOL, see L<EVP_MD-WHIRLPOOL(7)>
51 =item RIPEMD160, see L<EVP_MD-RIPEMD160(7)>
57 When algorithms for other operations start appearing, the
58 following =head2 titles are appropriate to use:
62 - Message Authentication Code (MAC)
64 - Key Derivation Function (KDF)
72 - Asymmetric Key Management
80 L<openssl-core_numbers.h(7)>,
85 Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
87 Licensed under the Apache License 2.0 (the "License"). You may not use
88 this file except in compliance with the License. You can obtain a copy
89 in the file LICENSE in the source distribution or at
90 L<https://www.openssl.org/source/license.html>.