5 EVP_MD-SHAKE, EVP_MD-KECCAK-KMAC
6 - The SHAKE / KECCAK family EVP_MD implementations
10 Support for computing SHAKE or KECCAK-KMAC digests through the
13 KECCAK-KMAC is a special digest that's used by the KMAC EVP_MAC
14 implementation (see L<EVP_MAC-KMAC(7)>).
18 This implementation is only available with the default provider, and
19 includes the following varieties:
25 Known names are "KECCAK-KMAC-128" and "KECCAK-KMAC128"
29 Known names are "KECCAK-KMAC-256" and "KECCAK-KMAC256"
33 Known names are "SHAKE-128" and "SHAKE128"
37 Known names are "SHAKE-256" and "SHAKE256"
41 =head2 Gettable Parameters
43 This implementation supports the common gettable parameters described
44 in L<EVP_MD-common(7)>.
46 =head2 Settable Context Parameters
48 These implementations support the following L<OSSL_PARAM(3)> entries,
49 settable for an B<EVP_MD_CTX> with L<EVP_MD_CTX_set_params(3)>:
53 =item "xoflen" (B<OSSL_DIGEST_PARAM_XOFLEN>) <unsigned integer>
55 Sets the digest length for extendable output functions.
56 The length of the "xoflen" parameter should not exceed that of a B<size_t>.
62 L<EVP_MD_CTX_set_params(3)>, L<provider-digest(7)>, L<OSSL_PROVIDER-default(7)>
66 Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
68 Licensed under the Apache License 2.0 (the "License"). You may not use
69 this file except in compliance with the License. You can obtain a copy
70 in the file LICENSE in the source distribution or at
71 L<https://www.openssl.org/source/license.html>.