OPENSSL-ENV(7SSL) - phpMan

OPENSSL-ENV(7SSL) OpenSSL OPENSSL-ENV(7SSL)

NAME
openssl-env - OpenSSL environment variables

DESCRIPTION
The OpenSSL libraries use environment variables to override the compiled-in default paths
for various data. To avoid security risks, the environment is usually not consulted when
the executable is set-user-ID or set-group-ID.

CTLOG_FILE
Specifies the path to a certificate transparency log list. See CTLOG_STORE_new(3).

OPENSSL
Specifies the path to the openssl executable. Used by the rehash script (see "Script
Configuration" in openssl-rehash(1)) and by the CA.pl script (see "NOTES" in CA.pl(1)

OPENSSL_CONF, OPENSSL_CONF_INCLUDE
Specifies the path to a configuration file and the directory for included files. See
config(5).

OPENSSL_CONFIG
Specifies a configuration option and filename for the req and ca commands invoked by
the CA.pl script. See CA.pl(1).

OPENSSL_ENGINES
Specifies the directory from which dynamic engines are loaded. See openssl-engine(1).

OPENSSL_MALLOC_FD, OPENSSL_MALLOC_FAILURES
If built with debugging, this allows memory allocation to fail. See
OPENSSL_malloc(3).

OPENSSL_MODULES
Specifies the directory from which cryptographic providers are loaded. Equivalently,
the generic -provider-path command-line option may be used.

OPENSSL_WIN32_UTF8
If set, then UI_OpenSSL(3) returns UTF-8 encoded strings, rather than ones encoded in
the current code page, and the openssl(1) program also transcodes the command-line
parameters from the current code page to UTF-8. This environment variable is only
checked on Microsoft Windows platforms.

RANDFILE
The state file for the random number generator. This should not be needed in normal
use. See RAND_load_file(3).

SSL_CERT_DIR, SSL_CERT_FILE
Specify the default directory or file containing CA certificates. See
SSL_CTX_load_verify_locations(3).

TSGET
Additional arguments for the tsget(1) command.

OPENSSL_ia32cap, OPENSSL_sparcv9cap, OPENSSL_ppccap, OPENSSL_armcap, OPENSSL_s390xcap
OpenSSL supports a number of different algorithm implementations for various machines
and, by default, it determines which to use based on the processor capabilities and
run time feature enquiry. These environment variables can be used to exert more
control over this selection process. See OPENSSL_ia32cap(3), OPENSSL_s390xcap(3).

NO_PROXY, HTTPS_PROXY, HTTP_PROXY
Specify a proxy hostname. See OSSL_HTTP_parse_url(3).

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>.

3.0.2 2025-09-18 OPENSSL-ENV(7SSL)

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