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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 an Extendable Output Function (XOF), with a definition
15 L<EVP_MAC-KMAC(7)>).
24 =item KECCAK-KMAC-128
26 Known names are "KECCAK-KMAC-128" and "KECCAK-KMAC128".  This is used
27 by L<EVP_MAC-KMAC128(7)>.  Using the notation from NIST FIPS 202
28 (Section 6.2), we have S<KECCAK-KMAC-128(M, d)> = S<KECCAK[256](M || 00, d)>
29 (see the description of KMAC128 in Appendix A of NIST SP 800-185).
31 =item KECCAK-KMAC-256
33 Known names are "KECCAK-KMAC-256" and "KECCAK-KMAC256".  This is used
34 by L<EVP_MAC-KMAC256(7)>.  Using the notation from NIST FIPS 202
35 (Section 6.2), we have S<KECCAK-KMAC-256(M, d)> = S<KECCAK[512](M || 00, d)>
36 (see the description of KMAC256 in Appendix A of NIST SP 800-185).
38 =item SHAKE-128
40 Known names are "SHAKE-128" and "SHAKE128".
42 =item SHAKE-256
44 Known names are "SHAKE-256" and "SHAKE256".
50 This implementation supports the following L<OSSL_PARAM(3)> entries:
59 The SHAKE-128 and SHAKE-256 implementations do not have any default digest
73 See L<EVP_DigestInit(3)/PARAMETERS> for further information related to parameters
77 For SHAKE-128, to ensure the maximum security strength of 128 bits, the output
80 For SHAKE-256, to ensure the maximum security strength of 256 bits, the output
85 L<EVP_MD_CTX_set_params(3)>, L<provider-digest(7)>, L<OSSL_PROVIDER-default(7)>
89 Since OpenSSL 3.4 the SHAKE-128 and SHAKE-256 implementations have no default
94 Copyright 2020-2024 The OpenSSL Project Authors. All Rights Reserved.