diff options
Diffstat (limited to 'upstream/archlinux/man7/EVP_RAND-SEED-SRC.7ssl')
| -rw-r--r-- | upstream/archlinux/man7/EVP_RAND-SEED-SRC.7ssl | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/upstream/archlinux/man7/EVP_RAND-SEED-SRC.7ssl b/upstream/archlinux/man7/EVP_RAND-SEED-SRC.7ssl new file mode 100644 index 00000000..cb04cd9c --- /dev/null +++ b/upstream/archlinux/man7/EVP_RAND-SEED-SRC.7ssl @@ -0,0 +1,139 @@ +.\" -*- 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_RAND-SEED-SRC 7ssl" +.TH EVP_RAND-SEED-SRC 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_RAND\-SEED\-SRC \- The randomness seed source EVP_RAND implementation +.SH DESCRIPTION +.IX Header "DESCRIPTION" +Support for deterministic random number generator seeding through the +\&\fBEVP_RAND\fR API. +.PP +The seed sources used are specified at the time OpenSSL is configured for +building using the \fB\-\-with\-rand\-seed=\fR option. By default, operating system +randomness sources are used. +.SS Identity +.IX Subsection "Identity" +"SEED-SRC" is the name for this implementation; it can be used with the +\&\fBEVP_RAND_fetch()\fR function. +.SS "Supported parameters" +.IX Subsection "Supported parameters" +The supported parameters are: +.IP """state"" (\fBOSSL_RAND_PARAM_STATE\fR) <integer>" 4 +.IX Item """state"" (OSSL_RAND_PARAM_STATE) <integer>" +.PD 0 +.IP """strength"" (\fBOSSL_RAND_PARAM_STRENGTH\fR) <unsigned integer>" 4 +.IX Item """strength"" (OSSL_RAND_PARAM_STRENGTH) <unsigned integer>" +.IP """max_request"" (\fBOSSL_RAND_PARAM_MAX_REQUEST\fR) <unsigned integer>" 4 +.IX Item """max_request"" (OSSL_RAND_PARAM_MAX_REQUEST) <unsigned integer>" +.PD +These parameters work as described in "PARAMETERS" in \fBEVP_RAND\fR\|(3). +.SH NOTES +.IX Header "NOTES" +A context for the seed source can be obtained by calling: +.PP +.Vb 2 +\& EVP_RAND *rand = EVP_RAND_fetch(NULL, "SEED\-SRC", NULL); +\& EVP_RAND_CTX *rctx = EVP_RAND_CTX_new(rand, NULL); +.Ve +.SH EXAMPLES +.IX Header "EXAMPLES" +.Vb 5 +\& EVP_RAND *rand; +\& EVP_RAND_CTX *seed, *rctx; +\& unsigned char bytes[100]; +\& OSSL_PARAM params[2], *p = params; +\& unsigned int strength = 128; +\& +\& /* Create and instantiate a seed source */ +\& rand = EVP_RAND_fetch(NULL, "SEED\-SRC", NULL); +\& seed = EVP_RAND_CTX_new(rand, NULL); +\& EVP_RAND_instantiate(seed, strength, 0, NULL, 0, NULL); +\& EVP_RAND_free(rand); +\& +\& /* Feed this into a DRBG */ +\& rand = EVP_RAND_fetch(NULL, "CTR\-DRBG", NULL); +\& rctx = EVP_RAND_CTX_new(rand, seed); +\& EVP_RAND_free(rand); +\& +\& /* Configure the DRBG */ +\& *p++ = OSSL_PARAM_construct_utf8_string(OSSL_DRBG_PARAM_CIPHER, +\& SN_aes_256_ctr, 0); +\& *p = OSSL_PARAM_construct_end(); +\& EVP_RAND_instantiate(rctx, strength, 0, NULL, 0, params); +\& +\& EVP_RAND_generate(rctx, bytes, sizeof(bytes), strength, 0, NULL, 0); +\& +\& EVP_RAND_CTX_free(rctx); +\& EVP_RAND_CTX_free(seed); +.Ve +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fBEVP_RAND\fR\|(3), +"PARAMETERS" in \fBEVP_RAND\fR\|(3) +.SH COPYRIGHT +.IX Header "COPYRIGHT" +Copyright 2020\-2021 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>. |