mirror of https://github.com/openssl/openssl.git
72 lines
1.7 KiB
Plaintext
72 lines
1.7 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_KDF-HMAC-DRBG
|
|
- The HMAC DRBG DETERMINISTIC EVP_KDF implementation
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
Support for a deterministic HMAC DRBG using the B<EVP_KDF> API. This is similar
|
|
to L<EVP_RAND-HMAC-DRBG(7)>, but uses fixed values for its entropy and nonce
|
|
values. This is used to generate deterministic nonce value required by ECDSA
|
|
and DSA (as defined in RFC 6979).
|
|
|
|
=head2 Identity
|
|
|
|
"HMAC-DRBG-KDF" is the name for this implementation; it can be used
|
|
with the EVP_KDF_fetch() function.
|
|
|
|
=head2 Supported parameters
|
|
|
|
The supported parameters are:
|
|
|
|
=over 4
|
|
|
|
=item "digest" (B<OSSL_DRBG_PARAM_DIGEST>) <UTF8 string>
|
|
|
|
=item "properties" (B<OSSL_DRBG_PARAM_PROPERTIES>) <UTF8 string>
|
|
|
|
These parameters work as described in L<EVP_KDF(3)/PARAMETERS>.
|
|
|
|
=item "entropy" (B<OSSL_KDF_PARAM_HMACDRBG_ENTROPY>) <octet string>
|
|
|
|
Sets the entropy bytes supplied to the HMAC-DRBG.
|
|
|
|
=item "nonce" (B<OSSL_KDF_PARAM_HMACDRBG_NONCE>) <octet string>
|
|
|
|
Sets the nonce bytes supplied to the HMAC-DRBG.
|
|
|
|
=back
|
|
|
|
=head1 NOTES
|
|
|
|
A context for KDF HMAC DRBG can be obtained by calling:
|
|
|
|
EVP_KDF *kdf = EVP_KDF_fetch(NULL, "HMAC-DRBG-KDF", NULL);
|
|
EVP_KDF_CTX *kdf_ctx = EVP_KDF_CTX_new(kdf, NULL);
|
|
|
|
=head1 CONFORMING TO
|
|
|
|
RFC 6979
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<EVP_KDF(3)>,
|
|
L<EVP_KDF(3)/PARAMETERS>
|
|
|
|
=head1 HISTORY
|
|
|
|
The EVP_KDF-HMAC-DRBG functionality was added in OpenSSL 3.2.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2022-2023 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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|