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+
+=pod
+
+=head1 NAME
+
+openssl - OpenSSL command line tool
+
+=head1 SYNOPSIS
+
+B<openssl>
+I<command>
+[ I<command_opts> ]
+[ I<command_args> ]
+
+=head1 DESCRIPTION
+
+OpenSSL is a cryptography toolkit implementing the Secure Sockets Layer (SSL
+v2/v3) and Transport Layer Security (TLS v1) network protocols and related
+cryptography standards required by them.
+
+The B<openssl> program is a command line tool for using the various
+cryptography functions of OpenSSL's B<crypto> library from the shell. 
+It can be used for 
+
+ o  Creation of RSA, DH and DSA key parameters
+ o  Creation of X.509 certificates, CSRs and CRLs 
+ o  Calculation of Message Digests
+ o  Encryption and Decryption with Ciphers
+ o  SSL/TLS Client and Server Tests
+
+=head1 COMMAND SUMMARY
+
+The B<openssl> program provides a rich variety of commands (I<command> in the
+SYNOPSIS above), each of which often has a wealth of options and arguments
+(I<command_opts> and I<command_args> in the SYNOPSIS).
+
+=head2 STANDARD COMMANDS
+
+=over 10
+
+=item B<asn1parse> 
+
+Parse an ASN.1 sequence.
+
+=item B<ca>
+
+Certificate Authority (CA) Management.  
+
+=item B<ciphers>
+
+Cipher Suite Description Determination.
+
+=item B<crl>
+
+Certificate Revocation List (CRL) Management.
+
+=item B<crl2pkcs7>      
+
+CRL2 to PKCS#7 Conversion.
+
+=item B<dgst>
+
+Message Digest Calculation.
+
+=item B<dh>
+
+Diffie-Hellman Data Management.
+
+=item B<dsa>
+
+DSA Data Management.
+
+=item B<dsaparam>
+
+DSA Parameter Generation.
+
+=item B<enc>            
+
+Encoding with Ciphers.
+
+=item B<errstr>
+
+Error Number to Error String Conversion.
+
+=item B<gendh>
+
+Generation of Diffie-Hellman Parameters.
+
+=item B<gendsa>
+
+Generation of DSA Parameters.
+
+=item B<genrsa>
+
+Generation of RSA Parameters.
+
+=item B<pkcs7>
+
+PKCS#7 Data Management.
+
+=item B<req>
+
+X.509 Certificate Signing Request (CSR) Management.
+
+=item B<rsa>
+
+RSA Data Management.
+
+=item B<s_client>
+
+This implements a generic SSL/TLS client which can establish a transparent
+connection to a remote server speaking SSL/TLS. It's intended for testing
+purposes only and provides only rudimentary interface functionality but
+internally uses mostly all functionality of the OpenSSL B<ssl> library.
+
+=item B<s_server>
+
+This implements a generic SSL/TLS server which accepts connections from remote
+clients speaking SSL/TLS. It's intended for testing purposes only and provides
+only rudimentary interface functionality but internally uses mostly all
+functionality of the OpenSSL B<ssl> library.  It provides both an own command
+line oriented protocol for testing SSL functions and a simple HTTP response
+facility to emulate an SSL/TLS-aware webserver.
+
+=item B<s_time>        
+
+SSL Connection Timer.
+
+=item B<sess_id>
+
+SSL Session Data Management.
+
+=item B<speed>
+
+Algorithm Speed Measurement.
+
+=item B<verify>
+
+X.509 Certificate Verification.
+
+=item B<version>
+
+OpenSSL Version Information.
+
+=item B<x509>           
+
+X.509 Certificate Data Management.
+
+=back
+
+=head2 MESSAGE DIGEST COMMANDS
+
+=over 10
+
+=item B<md2>
+
+MD2 Digest
+
+=item B<md5>
+
+MD5 Digest
+
+=item B<mdc2>
+
+MDC2 Digest
+
+=item B<rmd160>
+
+RMD-160 Digest
+
+=item B<sha>            
+
+SHA Digest
+
+=item B<sha1>           
+
+SHA-1 Digest
+
+=back
+
+=head2 ENCODING AND CIPHER COMMANDS
+
+=over 10
+
+=item B<base64>
+
+Base64 Encoding
+
+=item B<bf bf-cbc bf-cfb bf-ecb bf-ofb>
+
+Blowfish Cipher
+
+=item B<cast cast-cbc>
+
+CAST Cipher
+
+=item B<cast5-cbc cast5-cfb cast5-ecb cast5-ofb>
+
+CAST5 Cipher
+
+=item B<des des-cbc des-cfb des-ecb des-ede des-ede-cbc des-ede-cfb des-ede-ofb des-ofb>
+
+DES Cipher
+
+=item B<des3 desx des-ede3 des-ede3-cbc des-ede3-cfb des-ede3-ofb>
+
+Triple-DES Cipher
+
+=item B<idea idea-cbc idea-cfb idea-ecb idea-ofb>
+
+IDEA Cipher
+
+=item B<rc2 rc2-cbc rc2-cfb rc2-ecb rc2-ofb>
+
+RC2 Cipher
+
+=item B<rc4>
+
+RC4 Cipher
+
+=item B<rc5 rc5-cbc rc5-cfb rc5-ecb rc5-ofb>
+
+RC5 Cipher
+
+=back
+
+=head1 DETAILED COMMAND DESCRIPTION
+
+The following is a detailed description of every B<openssl> I<command>.
+
+=over 4
+
+=item B<openssl> B<s_client>
+[B<-connect> I<host>B<:>I<port>]
+[B<-verify> I<arg>]
+[B<-cert> I<arg>]
+[B<-key> I<arg>]
+[B<-CApath> I<arg>]
+[B<-CAfile> I<arg>]
+[B<-reconnect>]
+[B<-pause>]
+[B<-debug>]
+[B<-nbio_test>]
+[B<-state>]
+[B<-nbio>]
+[B<-quiet>]
+[B<-ssl2>]
+[B<-ssl3>]
+[B<-tls1>]
+[B<-no_ssl2>]
+[B<-no_ssl3>]
+[B<-no_tls1>]
+[B<-bugs>]
+[B<-cipher>]
+
+The B<s_client> command implements a generic SSL/TLS client which can
+establish a transparent connection to a remote I<host> and I<port> speaking
+SSL/TLS. 
+
+=item B<openssl> B<s_server>
+[B<-accept> I<port>]
+[B<-verify> I<arg>]
+[B<-Verify> I<arg>]
+[B<-cert> I<arg>]
+[B<-key> I<arg>]
+[B<-dcert> I<arg>]
+[B<-dkey> I<arg>]
+[B<-nbio>]
+[B<-nbio_test>]
+[B<-debug>]
+[B<-state>]
+[B<-CApath> I<arg>]
+[B<-CAfile> I<arg>]
+[B<-nocert>]
+[B<-cipher> I<arg>]
+[B<-quiet>]
+[B<-no_tmp_rsa>]
+[B<-ssl2>]
+[B<-ssl3>]
+[B<-tls1>]
+[B<-no_ssl2>]
+[B<-no_ssl3>]
+[B<-no_tls1>]
+[B<-bugs>]
+[B<-www>]
+[B<-WWW>]
+
+The B<s_server> command implements a generic SSL/TLS server which accepts
+connections from remote clients on I<port> speaking SSL/TLS.
+
+=back
+
+...
+
+=head1 SEE ALSO
+
+crypto(3), ssl(3)
+
+=head1 HISTORY
+
+The openssl(3) document appeared in OpenSSL 0.9.2
+
+=cut
+