virgil exhash.1

NAME

exhash -- derives hash from the given data with PBKDF function

SYNOPSIS

    virgil exhash  [-i <file>] [-o <file>] -s <file> [-a <sha1|sha224|sha256|sha384
         |sha512>] [-c <int>] [-V] [--] [--version] [-h]

DESCRIPTION

Derives the obfuscated data from incoming parameters using PBKDF function.

OPTIONS

    -i <file>,  --in <file>
     The string value to be hashed. If omitted, stdout is used.

    -o <file>,  --out <file>
     Hash. If omitted, stdout is used.

    -s <file>,  --salt <file>
     (required)  The hash salt.

    -a <sha1|sha224|sha256|sha384|sha512>,  --algorithm <sha1|sha224|sha256
      |sha384|sha512>
     Underlying hash algorithm:

        * sha1 -   secure Hash Algorithm 1;

        * sha224 - secure Hash Algorithm 2, that are 224 bits;

        * sha256 - secure Hash Algorithm 2, that are 256 bits;

        * sha384 - secure Hash Algorithm 2, that are 384 bits(default);

        * sha512 - secure Hash Algorithm 2, that are 512 bits;


    -c <int>,  --iterations <int>
     Iterations count. Default - 2048

    -V,  --VERBOSE
     Shows detailed information.

    --,  --ignore_rest
     Ignores the rest of the labeled arguments following this flag.

    --version
     Displays version information and exits.

    -h,  --help
     Displays usage information and exits.

EXAMPLES

1. Underlying hash - SHA384 (default), iterations - 2048 (default):

   virgil exhash -i data.txt -o obfuscated_data.txt -s data_salt.txt
   

2. Underlying hash - SHA512, iterations - 4096:

   virgil exhash -i data.txt -o obfuscated_data.txt -s data_salt.txt -a sha512 -c 4096
   

SEE ALSO

virgil(1) virgil-card-create-private(1)