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Utilities Overview

The OpenSSL package

This section describes a version of the openssl program that is available with Eric Young’s OpenSSL package, which can be downloaded from the OpenSSL Web site, http://www.openssl.org. OpenSSL is a publicly available implementation of the SSL protocol. Consult Appendix C for information about the copyright terms of OpenSSL.

Note

For complete documentation of the OpenSSL utilities, consult the documentation at the OpenSSL web site http://www.openssl.org/docs.

Command syntax

An openssl command line takes the following form:

openssl utility arguments

For example:

openssl x509 -in OrbixCA -text

The openssl utilities

This appendix describes the following openssl utilities:

x509Manipulates X.509 certificates.
reqCreates and manipulates certificate signing requests, and self-signed certificates.
rsaManipulates RSA private keys.
caImplements a Certification Authority (CA).
s_clientImplements a generic SSL/TLS client.
s_serverImplements a generic SSL/TLS server.

The -help option

To get a list of the arguments associated with a particular command, use the -help option as follows:

openssl utility -help

For example:

openssl x509 -help
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