[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 digest>]
[B<-p>]
[B<-P>]
[B<-bufsize number>]
[B<-nopad>]
[B<-debug>]
+[B<-none>]
+[B<-engine id>]
=head1 DESCRIPTION
=item B<-pass arg>
the password source. For more information about the format of B<arg>
-see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)|openssl(1)>.
+see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)>.
=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.
=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.
=item B<-kfile filename>
read the password to derive the key from the first line of B<filename>.
-This is for computability with previous versions of OpenSSL. Superseded by
+This is for compatibility with previous versions of OpenSSL. Superseded by
the B<-pass> argument.
+=item B<-md digest>
+
+Use the specified digest to create the key from the passphrase.
+The default algorithm is sha-256.
+
+=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 hardware-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.
The B<-salt> option should B<ALWAYS> be used if the key is being derived
from a password unless you want compatibility with previous versions of
-OpenSSL and SSLeay.
+OpenSSL.
Without the B<-salt> option it is possible to perform efficient dictionary
attacks on the password and to attack stream cipher encrypted data. The reason
performed. However since the chance of random data passing the test is
better than 1 in 256 it isn't a very good test.
-If padding is disabled then the input data must be a muliple of the cipher
+If padding is disabled then the input data must be a multiple of the cipher
block length.
All RC2 ciphers have the same key and effective key length.
=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 version of OpenSSL, including
+ones provided by configured engines.
+
+The B<enc> program does not support authenticated encryption modes
+like CCM and GCM. The utility does not store or retrieve the
+authentication tag.
+
+
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
rc2-cbc 128 bit RC2 in CBC mode
rc2 Alias for rc2-cbc
- rc2-cfb 128 bit RC2 in CBC mode
- rc2-ecb 128 bit RC2 in CBC mode
- rc2-ofb 128 bit RC2 in CBC mode
+ rc2-cfb 128 bit RC2 in CFB mode
+ rc2-ecb 128 bit RC2 in ECB mode
+ rc2-ofb 128 bit RC2 in OFB mode
rc2-64-cbc 64 bit RC2 in CBC mode
rc2-40-cbc 40 bit RC2 in CBC mode
rc5-cbc RC5 cipher in CBC mode
rc5 Alias for rc5-cbc
- rc5-cfb RC5 cipher in CBC mode
- rc5-ecb RC5 cipher in CBC mode
- rc5-ofb RC5 cipher in CBC mode
+ rc5-cfb RC5 cipher 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
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.
+=head1 HISTORY
+
+The default digest was changed from MD5 to SHA256 in Openssl 1.1.
+
=cut
projects / openssl.git / blobdiff