a73d990e2b
The RAND_DRBG API was added in PR #5462 and modified by PR #5547. This commit adds the corresponding documention. Reviewed-by: Kurt Roeckx <kurt@roeckx.be> Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/5461)
58 lines
1.5 KiB
Text
58 lines
1.5 KiB
Text
=pod
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=head1 NAME
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RAND_bytes, RAND_priv_bytes, RAND_pseudo_bytes - generate random data
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=head1 SYNOPSIS
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#include <openssl/rand.h>
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int RAND_bytes(unsigned char *buf, int num);
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int RAND_priv_bytes(unsigned char *buf, int num);
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Deprecated:
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#if OPENSSL_API_COMPAT < 0x10100000L
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int RAND_pseudo_bytes(unsigned char *buf, int num);
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#endif
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=head1 DESCRIPTION
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RAND_bytes() puts B<num> cryptographically strong pseudo-random bytes
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into B<buf>. An error occurs if the CSPRNG has not been seeded with
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enough randomness to ensure an unpredictable byte sequence.
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RAND_priv_bytes() has the same semantics as RAND_bytes(). It is intended to
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be used for generating long-term private keys. If using the default
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RAND_METHOD, this function uses a separate instance of the PRNG so that
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a compromise of the global generator will not affect such key generation.
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=head1 RETURN VALUES
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RAND_bytes() and RAND_priv_bytes()
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return 1 on success, -1 if not supported by the current
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RAND method, or 0 on other failure. The error code can be
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obtained by L<ERR_get_error(3)>.
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=head1 HISTORY
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RAND_pseudo_bytes() was deprecated in OpenSSL 1.1.0; use RAND_bytes() instead.
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=head1 SEE ALSO
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L<RAND_add(3)>,
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L<RAND_bytes(3)>,
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L<ERR_get_error(3)>,
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L<RAND(7)>
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=head1 COPYRIGHT
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Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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