202 lines
6.6 KiB
Groff
Executable File
202 lines
6.6 KiB
Groff
Executable File
.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
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.rm #[ #] #H #V #F C
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL_CONFIG 3"
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.TH OPENSSL_CONFIG 3 "2020-03-02" "1.1.1e-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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OPENSSL_config, OPENSSL_no_config \- simple OpenSSL configuration functions
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/conf.h>
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\&
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\& #if OPENSSL_API_COMPAT < 0x10100000L
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\& void OPENSSL_config(const char *appname);
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\& void OPENSSL_no_config(void);
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\& #endif
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fIOPENSSL_config()\fR configures OpenSSL using the standard \fBopenssl.cnf\fR and
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reads from the application section \fBappname\fR. If \fBappname\fR is \s-1NULL\s0 then
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the default section, \fBopenssl_conf\fR, will be used.
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Errors are silently ignored.
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Multiple calls have no effect.
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.PP
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\&\fIOPENSSL_no_config()\fR disables configuration. If called before \fIOPENSSL_config()\fR
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no configuration takes place.
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.PP
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If the application is built with \fB\s-1OPENSSL_LOAD_CONF\s0\fR defined, then a
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call to \fIOpenSSL_add_all_algorithms()\fR will implicitly call \fIOPENSSL_config()\fR
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first.
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.SH "NOTES"
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.IX Header "NOTES"
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The \fIOPENSSL_config()\fR function is designed to be a very simple \*(L"call it and
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forget it\*(R" function.
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It is however \fBmuch\fR better than nothing. Applications which need finer
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control over their configuration functionality should use the configuration
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functions such as \fICONF_modules_load()\fR directly. This function is deprecated
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and its use should be avoided.
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Applications should instead call \fICONF_modules_load()\fR during
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initialization (that is before starting any threads).
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.PP
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There are several reasons why calling the OpenSSL configuration routines is
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advisable. For example, to load dynamic ENGINEs from shared libraries (DSOs).
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However very few applications currently support the control interface and so
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very few can load and use dynamic ENGINEs. Equally in future more sophisticated
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ENGINEs will require certain control operations to customize them. If an
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application calls \fIOPENSSL_config()\fR it doesn't need to know or care about
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\&\s-1ENGINE\s0 control operations because they can be performed by editing a
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configuration file.
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.SH "ENVIRONMENT"
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.IX Header "ENVIRONMENT"
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.IP "\fB\s-1OPENSSL_CONF\s0\fR" 4
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.IX Item "OPENSSL_CONF"
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The path to the config file.
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Ignored in set-user-ID and set-group-ID programs.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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Neither \fIOPENSSL_config()\fR nor \fIOPENSSL_no_config()\fR return a value.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIconfig\fR\|(5),
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\&\fICONF_modules_load_file\fR\|(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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The \fIOPENSSL_no_config()\fR and \fIOPENSSL_config()\fR functions were
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deprecated in OpenSSL 1.1.0 by \fIOPENSSL_init_crypto()\fR.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2004\-2018 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the OpenSSL license (the \*(L"License\*(R"). 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 \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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