diff options
Diffstat (limited to 'crypto/openssl/doc/apps/enc.pod')
| -rw-r--r-- | crypto/openssl/doc/apps/enc.pod | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/crypto/openssl/doc/apps/enc.pod b/crypto/openssl/doc/apps/enc.pod index a68ddca..ddf0816 100644 --- a/crypto/openssl/doc/apps/enc.pod +++ b/crypto/openssl/doc/apps/enc.pod @@ -21,6 +21,7 @@ B<openssl enc -ciphername> [B<-p>] [B<-P>] [B<-bufsize number>] +[B<-nopad>] [B<-debug>] =head1 DESCRIPTION @@ -122,6 +123,10 @@ or decryption. set the buffer size for I/O +=item B<-nopad> + +disable standard block padding + =item B<-debug> debug the BIOs used for I/O. @@ -150,11 +155,14 @@ Some of the ciphers do not have large keys and others have security implications if not used correctly. A beginner is advised to just use a strong block cipher in CBC mode such as bf or des3. -All the block ciphers use PKCS#5 padding also known as standard block +All the block ciphers normally use PKCS#5 padding also known as standard block padding: this allows a rudimentary integrity or password check to be 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 multiple of the cipher +block length. + All RC2 ciphers have the same key and effective key length. Blowfish and RC5 algorithms use a 128 bit key. @@ -256,8 +264,8 @@ The B<-A> option when used with large files doesn't work properly. There should be an option to allow an iteration count to be included. -Like the EVP library the B<enc> program only supports a fixed number of -algorithms with 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 only supports a fixed number of algorithms with +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. =cut |
