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1 .\" -*- mode: troff; coding: utf-8 -*-
57 .IX Title "EVP_RAND-HASH-DRBG 7ossl"
58 .TH EVP_RAND-HASH-DRBG 7ossl 2025-09-30 3.5.4 OpenSSL
64 EVP_RAND\-HASH\-DRBG \- The HASH DRBG EVP_RAND implementation
71 "HASH-DRBG" is the name for this implementation; it can be used with the
107 .IP """fips-indicator"" (\fBOSSL_DRBG_PARAM_FIPS_APPROVED_INDICATOR\fR) <integer>" 4
108 .IX Item """fips-indicator"" (OSSL_DRBG_PARAM_FIPS_APPROVED_INDICATOR) <integer>"
110 .IP """digest-check"" (\fBOSSL_DRBG_PARAM_FIPS_DIGEST_CHECK\fR) <integer>" 4
111 .IX Item """digest-check"" (OSSL_DRBG_PARAM_FIPS_DIGEST_CHECK) <integer>"
113 These parameters work as described in "PARAMETERS" in \fBprovider\-rand\fR\|(7).
116 When the FIPS provider is installed using the \fB\-no_drbg_truncated_digests\fR
118 FIPS 140\-3 IG D.R <https://csrc.nist.gov/CSRC/media/Projects/cryptographic-module-validation-progr…
120 The default HASH-DRBG implementation attempts to fetch the required internal
125 .IP SHA\-1 4
126 .IX Item "SHA-1"
128 .IP SHA2\-256 4
129 .IX Item "SHA2-256"
130 .IP SHA2\-512 4
131 .IX Item "SHA2-512"
132 .IP SHA3\-256 4
133 .IX Item "SHA3-256"
134 .IP SHA3\-512 4
135 .IX Item "SHA3-512"
141 \& EVP_RAND *rand = EVP_RAND_fetch(NULL, "HASH\-DRBG", NULL);
153 \& rand = EVP_RAND_fetch(NULL, "HASH\-DRBG", NULL);
167 NIST SP 800\-90A and SP 800\-90B
172 \&\fBopenssl\-fipsinstall\fR\|(1)
175 OpenSSL 3.1.1 introduced the \fB\-no_drbg_truncated_digests\fR option to
178 FIPS 140\-3 IG D.R <https://csrc.nist.gov/CSRC/media/Projects/cryptographic-module-validation-progr…
181 Copyright 2020\-2025 The OpenSSL Project Authors. All Rights Reserved.