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OPENSSL(1) OpenSSL OPENSSL(1)
NAME
openssl - OpenSSL command line tool
SYNOPSIS
openssl command [ command_opts ] [ command_args ]
openssl [ list-standard-commands | list-message-digest-commands | list-cipher-com-
mands ]
openssl no-XXX [ arbitrary options ]
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 openssl program is a command line tool for using the various cryptography func-
tions of OpenSSL's 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
o Handling of S/MIME signed or encrypted mail
COMMAND SUMMARY
The openssl program provides a rich variety of commands (command in the SYNOPSIS
above), each of which often has a wealth of options and arguments (command_opts and
command_args in the SYNOPSIS).
The pseudo-commands list-standard-commands, list-message-digest-commands, and list-
cipher-commands output a list (one entry per line) of the names of all standard
commands, message digest commands, or cipher commands, respectively, that are
available in the present openssl utility.
The pseudo-command no-XXX tests whether a command of the specified name is avail-
able. If no command named XXX exists, it returns 0 (success) and prints no-XXX;
otherwise it returns 1 and prints XXX. In both cases, the output goes to stdout
and nothing is printed to stderr. Additional command line arguments are always
ignored. Since for each cipher there is a command of the same name, this provides
an easy way for shell scripts to test for the availability of ciphers in the
openssl program. (no-XXX is not able to detect pseudo-commands such as quit,
list-...-commands, or no-XXX itself.)
STANDARD COMMANDS
asn1parse Parse an ASN.1 sequence.
ca Certificate Authority (CA) Management.
ciphers Cipher Suite Description Determination.
crl Certificate Revocation List (CRL) Management.
crl2pkcs7 CRL to PKCS#7 Conversion.
dgst Message Digest Calculation.
dh Diffie-Hellman Parameter Management. Obsoleted by dhparam.
dsa DSA Data Management.
dsaparam DSA Parameter Generation.
enc Encoding with Ciphers.
errstr Error Number to Error String Conversion.
dhparam Generation and Management of Diffie-Hellman Parameters.
gendh Generation of Diffie-Hellman Parameters. Obsoleted by dhparam.
gendsa Generation of DSA Parameters.
genrsa Generation of RSA Parameters.
ocsp Online Certificate Status Protocol utility.
passwd Generation of hashed passwords.
pkcs12 PKCS#12 Data Management.
pkcs7 PKCS#7 Data Management.
rand Generate pseudo-random bytes.
req X.509 Certificate Signing Request (CSR) Management.
rsa RSA Data Management.
rsautl RSA utility for signing, verification, encryption, and decryption.
s_client This implements a generic SSL/TLS client which can establish a transpar-
ent connection to a remote server speaking SSL/TLS. It's intended for
testing purposes only and provides only rudimentary interface functional-
ity but internally uses mostly all functionality of the OpenSSL ssl
library.
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 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.
s_time SSL Connection Timer.
sess_id SSL Session Data Management.
smime S/MIME mail processing.
speed Algorithm Speed Measurement.
verify X.509 Certificate Verification.
version OpenSSL Version Information.
x509 X.509 Certificate Data Management.
MESSAGE DIGEST COMMANDS
md2 MD2 Digest
md5 MD5 Digest
mdc2 MDC2 Digest
rmd160 RMD-160 Digest
sha SHA Digest
sha1 SHA-1 Digest
sha224 SHA-224 Digest
sha256 SHA-256 Digest
sha384 SHA-384 Digest
sha512 SHA-512 Digest
ENCODING AND CIPHER COMMANDS
base64 Base64 Encoding
bf bf-cbc bf-cfb bf-ecb bf-ofb
Blowfish Cipher
cast cast-cbc
CAST Cipher
cast5-cbc cast5-cfb cast5-ecb cast5-ofb
CAST5 Cipher
des des-cbc des-cfb des-ecb des-ede des-ede-cbc des-ede-cfb des-ede-ofb des-ofb
DES Cipher
des3 desx des-ede3 des-ede3-cbc des-ede3-cfb des-ede3-ofb
Triple-DES Cipher
idea idea-cbc idea-cfb idea-ecb idea-ofb
IDEA Cipher
rc2 rc2-cbc rc2-cfb rc2-ecb rc2-ofb
RC2 Cipher
rc4 RC4 Cipher
rc5 rc5-cbc rc5-cfb rc5-ecb rc5-ofb
RC5 Cipher
PASS PHRASE ARGUMENTS
Several commands accept password arguments, typically using -passin and -passout
for input and output passwords respectively. These allow the password to be
obtained from a variety of sources. Both of these options take a single argument
whose format is described below. If no password argument is given and a password is
required then the user is prompted to enter one: this will typically be read from
the current terminal with echoing turned off.
pass:password
the actual password is password. Since the password is visible to utili-
ties (like 'ps' under Unix) this form should only be used where security
is not important.
env:var obtain the password from the environment variable var. Since the environ-
ment of other processes is visible on certain platforms (e.g. ps under
certain Unix OSes) this option should be used with caution.
file:pathname
the first line of pathname is the password. If the same pathname argument
is supplied to -passin and -passout arguments then the first line will be
used for the input password and the next line for the output password.
pathname need not refer to a regular file: it could for example refer to
a device or named pipe.
fd:number read the password from the file descriptor number. This can be used to
send the data via a pipe for example.
stdin read the password from standard input.
SEE ALSO
asn1parse(1), ca(1), config(5), crl(1), crl2pkcs7(1), dgst(1), dhparam(1), dsa(1),
dsaparam(1), enc(1), gendsa(1), genrsa(1), nseq(1), openssl(1), passwd(1),
pkcs12(1), pkcs7(1), pkcs8(1), rand(1), req(1), rsa(1), rsautl(1), s_client(1),
s_server(1), s_time(1), smime(1), spkac(1), verify(1), version(1), x509(1),
crypto(3), ssl(3)
HISTORY
The openssl(1) document appeared in OpenSSL 0.9.2. The list-XXX-commands pseudo-
commands were added in OpenSSL 0.9.3; the no-XXX pseudo-commands were added in
OpenSSL 0.9.5a. For notes on the availability of other commands, see their indi-
vidual manual pages.
0.9.8e-rhel5 2007-09-18 OPENSSL(1)
Generated by $Id: phpMan.php,v 4.54 2007/08/21 09:05:22 chedong Exp $ Author: Che Dong
On Apache/2.2.3 (CentOS)
Under GNU General Public License
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