AESCrypt: Rijndael encryption for shell scripts.

Usage:

Encrypt/decrypt stdin using the Advanced Encryption Standard winner "Rijndael" encryption algorithm in Cipher Block Feedback (stream) mode. Uses /dev/urandom to create a salt. Prepends the output stream with salt when encrypting, strips it off when decrypting.

Keyfile format:

...
kk=hexdits\n
...
where hexdits is:

32 chars for 128 bit
48 chars for 196 bits.
64 chars for 256 bits

Note that there may be other text in the file. But the key must be at start of a line, and must start with 'kk=', and must be hex.

If the key file is "-", it instead reads the first 33 bytes off stdin and treats them as a null-terminated hex key. Using "-" limits you to 128-bit keys, but prevents having to put the key onto disk for those cases where you are using public key encryption to chat session keys for aescrypt and do not want the session key anywhere that it could get intercepted.

Limitations:

1. The keyfile is *NOT* encrypted.
2. Keysize = 128 bits, hard-coded at the moment, despite any documentation to the contrary. Need a "-s" option to specify key size, sigh.
3. Need a key generator! ( This should be a simple shell script -- use dd to grab some data, then md5sum to create a hex mix of that data, then 'awk' to grab the hex part of the output of md5sum ).
4. Relies upon having /dev/urandom. See the Ocotillo PRNG if you don't have a /dev/urandom.
5. This program was deliberately kept extremely simple. It is not intended to be a full encryption solution, it is intended to be used within scripts as part of a complete solution. Keychain management, public key signatures, etc. are all expected to be done external to this program.

Legal Notices

Obtaining Source

• aescrypt-0.6.tar.gz

Installation:

Authors:

AESCrypt was written by Eric Lee Green, and was modified to use Rijndael rather than Twofish by Randy Kielber. AESCrypt is copyrighted by Enhanced Software Technologies Inc., but is released under a BSD-style Open Source license. See file LICENSE for info.

Attribution information: This software includes Rijndael encryption routines by Antoon Bosselaers and Vincent Rijmen. They have stated that their routines are free for public use.

Hosting: