1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
.\" -*- mode: troff; coding: utf-8 -*-
.\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
.ie n \{\
. ds C` ""
. ds C' ""
'br\}
.el\{\
. ds C`
. ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
. de IX
. tm Index:\\$1\t\\n%\t"\\$2"
..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\" ========================================================================
.\"
.IX Title "EVP_KDF-HMAC-DRBG 7ssl"
.TH EVP_KDF-HMAC-DRBG 7ssl 2024-01-30 3.2.1 OpenSSL
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
EVP_KDF\-HMAC\-DRBG
\&\- The HMAC DRBG DETERMINISTIC EVP_KDF implementation
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Support for a deterministic HMAC DRBG using the \fBEVP_KDF\fR API. This is similar
to \fBEVP_RAND\-HMAC\-DRBG\fR\|(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).
.SS Identity
.IX Subsection "Identity"
"HMAC-DRBG-KDF" is the name for this implementation; it can be used
with the \fBEVP_KDF_fetch()\fR function.
.SS "Supported parameters"
.IX Subsection "Supported parameters"
The supported parameters are:
.IP """digest"" (\fBOSSL_DRBG_PARAM_DIGEST\fR) <UTF8 string>" 4
.IX Item """digest"" (OSSL_DRBG_PARAM_DIGEST) <UTF8 string>"
.PD 0
.IP """properties"" (\fBOSSL_DRBG_PARAM_PROPERTIES\fR) <UTF8 string>" 4
.IX Item """properties"" (OSSL_DRBG_PARAM_PROPERTIES) <UTF8 string>"
.PD
These parameters work as described in "PARAMETERS" in \fBEVP_KDF\fR\|(3).
.IP """entropy"" (\fBOSSL_KDF_PARAM_HMACDRBG_ENTROPY\fR) <octet string>" 4
.IX Item """entropy"" (OSSL_KDF_PARAM_HMACDRBG_ENTROPY) <octet string>"
Sets the entropy bytes supplied to the HMAC-DRBG.
.IP """nonce"" (\fBOSSL_KDF_PARAM_HMACDRBG_NONCE\fR) <octet string>" 4
.IX Item """nonce"" (OSSL_KDF_PARAM_HMACDRBG_NONCE) <octet string>"
Sets the nonce bytes supplied to the HMAC-DRBG.
.SH NOTES
.IX Header "NOTES"
A context for KDF HMAC DRBG can be obtained by calling:
.PP
.Vb 2
\& EVP_KDF *kdf = EVP_KDF_fetch(NULL, "HMAC\-DRBG\-KDF", NULL);
\& EVP_KDF_CTX *kdf_ctx = EVP_KDF_CTX_new(kdf, NULL);
.Ve
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
RFC 6979
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_KDF\fR\|(3),
"PARAMETERS" in \fBEVP_KDF\fR\|(3)
.SH HISTORY
.IX Header "HISTORY"
The EVP_KDF\-HMAC\-DRBG functionality was added in OpenSSL 3.2.
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright 2022\-2023 The OpenSSL Project Authors. All Rights Reserved.
.PP
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>.
|
