[B<-pass arg>]
[B<-e>]
[B<-d>]
-[B<-a>]
+[B<-a/-base64>]
[B<-A>]
[B<-k password>]
[B<-kfile filename>]
[B<-K key>]
[B<-iv IV>]
+[B<-S salt>]
+[B<-salt>]
+[B<-nosalt>]
+[B<-z>]
+[B<-md>]
[B<-p>]
[B<-P>]
[B<-bufsize number>]
[B<-nopad>]
[B<-debug>]
+[B<-none>]
+[B<-engine id>]
=head1 DESCRIPTION
=item B<-salt>
-use a salt in the key derivation routines. This option should B<ALWAYS>
-be used unless compatibility with previous versions of OpenSSL or SSLeay
-is required. This option is only present on OpenSSL versions 0.9.5 or
-above.
+use a salt in the key derivation routines. This is the default.
=item B<-nosalt>
-don't use a salt in the key derivation routines. This is the default for
-compatibility with previous versions of OpenSSL and SSLeay.
+don't use a salt in the key derivation routines. This option B<SHOULD NOT> be
+used except for test purposes or compatibility with ancient versions of OpenSSL
+and SSLeay.
=item B<-e>
the data is base64 encoded after encryption. If decryption is set then
the input data is base64 decoded before being decrypted.
+=item B<-base64>
+
+same as B<-a>
+
=item B<-A>
if the B<-a> option is set then base64 process the data on one line.
This is for compatibility with previous versions of OpenSSL. Superseded by
the B<-pass> argument.
+=item B<-nosalt>
+
+do not use a salt
+
+=item B<-salt>
+
+use salt (randomly generated or provide with B<-S> option) when
+encrypting (this is the default).
+
=item B<-S salt>
-the actual salt to use: this must be represented as a string comprised only
-of hex digits.
+the actual salt to use: this must be represented as a string of hex digits.
=item B<-K key>
debug the BIOs used for I/O.
+=item B<-z>
+
+Compress or decompress clear text using zlib before encryption or after
+decryption. This option exists only if OpenSSL with compiled with zlib
+or zlib-dynamic option.
+
+=item B<-none>
+
+Use NULL cipher (no encryption or decryption of input).
+
=back
=head1 NOTES
The program can be called either as B<openssl ciphername> or
-B<openssl enc -ciphername>.
+B<openssl enc -ciphername>. But the first form doesn't work with
+engine-provided ciphers, because this form is processed before the
+configuration file is read and any ENGINEs loaded.
+
+Engines which provide entirely new encryption algorithms (such as ccgost
+engine which provides gost89 algorithm) should be configured in the
+configuration file. Engines, specified in the command line using -engine
+options can only be used for hadrware-assisted implementations of
+ciphers, which are supported by OpenSSL core or other engine, specified
+in the configuration file.
+
+When enc command lists supported ciphers, ciphers provided by engines,
+specified in the configuration files are listed too.
A password will be prompted for to derive the key and IV if necessary.
=head1 SUPPORTED CIPHERS
+Note that some of these ciphers can be disabled at compile time
+and some are available only if an appropriate engine is configured
+in the configuration file. The output of the B<enc> command run with
+unsupported options (for example B<openssl enc -help>) includes a
+list of ciphers, supported by your versesion of OpenSSL, including
+ones provided by configured engines.
+
+
base64 Base 64
bf-cbc Blowfish in CBC mode
des-ecb DES in ECB mode
des-ede-cbc Two key triple DES EDE in CBC mode
- des-ede Alias for des-ede
+ des-ede Two key triple DES EDE in ECB mode
des-ede-cfb Two key triple DES EDE in CFB mode
des-ede-ofb Two key triple DES EDE in OFB mode
des-ede3-cbc Three key triple DES EDE in CBC mode
- des-ede3 Alias for des-ede3-cbc
+ des-ede3 Three key triple DES EDE in ECB mode
des3 Alias for des-ede3-cbc
des-ede3-cfb Three key triple DES EDE CFB mode
des-ede3-ofb Three key triple DES EDE in OFB mode
desx DESX algorithm.
+ gost89 GOST 28147-89 in CFB mode (provided by ccgost engine)
+ gost89-cnt `GOST 28147-89 in CNT mode (provided by ccgost engine)
+
idea-cbc IDEA algorithm in CBC mode
idea same as idea-cbc
idea-cfb IDEA in CFB mode
rc5-ecb RC5 cipher in ECB mode
rc5-ofb RC5 cipher in OFB mode
+ aes-[128|192|256]-cbc 128/192/256 bit AES in CBC mode
+ aes-[128|192|256] Alias for aes-[128|192|256]-cbc
+ aes-[128|192|256]-cfb 128/192/256 bit AES in 128 bit CFB mode
+ aes-[128|192|256]-cfb1 128/192/256 bit AES in 1 bit CFB mode
+ aes-[128|192|256]-cfb8 128/192/256 bit AES in 8 bit CFB mode
+ aes-[128|192|256]-ecb 128/192/256 bit AES in ECB mode
+ aes-[128|192|256]-ofb 128/192/256 bit AES in OFB mode
+
=head1 EXAMPLES
Just base64 encode a binary file:
certain parameters. So if, for example, you want to use RC2 with a
76 bit key or RC4 with an 84 bit key you can't use this program.
+The B<enc> program does not support authenticated encryption modes
+like CCM and GCM. The utility does not store or retrieve the
+authentication tag.
+
=cut
projects / openssl.git / blobdiff