NAME

       hasher2 - block based hashing utility

                                                                                                      RAHASH2(1)
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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>