NAME

akmos - sets of cryptography utils

SYNOPSIS

akmos {action} [options]

DESCRIPTION

The akmos utility is used for encryption/decryption files and streams, compute message digests and other.

Here is the list of available actions:

dgst

calculate message digests

enc, dec

symmetric ciphering

mac

compute message authentication code

base64

binary to text encoding

help

Print a short help

SYMMETRIC CIPHERING

akmos enc|dec [-a algo[:flag]] [-m mode] [-k keyfile] [-l keylen] [-p | -P passfile] [-y] [-V] [-h] {input} {output}

Options

-a algo[:flag]

Crypto algorithm to use. By default is Twofish

Supported FLAGS

:ede flag put cipher into Encrypt-Decrypt-Encrypt mode (like 3DES)

:eee flag put cipher into Encrypt-Encrypt-Encrypt mode

NOTE: TDEA not available with stream ciphers

-m mode

Crypto mode to use. By default is CBC for block ciphers, and CTR for stream ciphers.

-k keyfile

Specifies a file which contains the keyfile

NOTE: size of keyfile is limited by 1 MiB

-p

Use a passphrase as a component of the keyfile

-P passfile

Read passphrase from a file

-l keylen

Key length (in bits) to use with the given crypto algorithm. By default is 128 bits

-y

Overwrite output file without promt

-V

Display akmos version

-h

Print a short help

Supported symmetric crypto algorithms: Anubis, Blowfish, Chacha, Camellia, CAST6, RC6, Rijndael, Salsa, SEED, Serpent, Twofish, Threefish-256, Threefish-512, Threefish-1024

Modes

Supported cipher modes:

CBC - Cipher Block Chaining

CFB - Cipher Feedback

CTR - Counter

ECB - Electronic Codebook

OFB - Output Feedback

Key length

Anubis

128, 192, 256, 320

Blowfish

128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448

Chacha

256

Camellia

128, 192, 256

CAST6

128, 192, 256

RC6

128, 192, 256

Rijndael

128, 192, 256

Salsa

128, 256

SEED

128

Serpent

128, 192, 256

Threefish-256

256

Threefish-512

512

Threefish-1024

1024

Twofish

128, 192, 256

HASHING

akmos dgst [-a algo] [-n threads] [-b] [-V] [-h] input...

Options

-a algo

Digest algorithm to use. By default is SHA2-256

-n threads

Number of the threads to process multiple inputs. By default is 2

-b

Output result in binary format. By default use hexadecimal

-V

Display akmos version

-h

Print a short help

Algorithms

Supported digest algorithms: RIPEMD-160, RIPEMD-256, RIPEMD-320, SHA1, SHA2-224, SHA2-256, SHA2-384, SHA2-512, SHA3-224, SHA3-256, SHA3-384, SHA3-512, SKEIN-256, SKEIN-512, SKEIN-1024, TIGER, WHIRLPOOL