NAME

       hasher2 - block based hashing utility

SYNOPSIS

     hasher2 [-hBrkv] [-a algorithm] [-b size] [-s string] [-i iterations] [-S seed] [-f from]
             [-t to] [[file] ...]

DESCRIPTION

     This program is part of the radare project.

     Hasher allows you to calculate, check and show the hash values of each block of a target
     file. The block size is 32768 bytes by default. It's allowed to hash from stdin using '-' as
     a target file.

     You can hash big files by hashing each block and later determine what part of it has been
     modified. Useful for filesystem analysis.

     This command can be used to calculate hashes of a certain part of a file or a command line
     passed string.

     This is the command used by the '#' command of radare.

     -a algo     Select an algorithm for the hashing. Valid values are md5, crc32 and sha1

     -b blocksize
                 Define the block size

     -i iters    Apply the hash Iters times to itself+seed

     -B          Show per-block hash

     -k          Show result using OpenSSH's VisualHostKey randomart algorithm

     -s string   Hash this string instead of using the 'source' and 'hash-file' arguments.

     -S [^]s:string|hexstr
                 Set seed to hash with, use ^to prefix seed, otherwise its suffixed.

     -f from     Start hashing at given address

     -t to       Stop hashing at given address

     -r          Show output in radare commands

     -v          Show version information

     -h          Show usage help message.

SEE ALSO

     radare2(1), rafind2(1), rahash2(1), rabin2(1), radiff2(1), rasm2(1), ragg2(1), rarun2(1),
     rax2(1),

AUTHORS

     pancake <pancake@nopcode.org>, nibble <nibble@develsec.org>

                                                                                       RAHASH2(1)