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73 lines
1.8 KiB
Groff
73 lines
1.8 KiB
Groff
.Dd Sep 30, 2014
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.Dt RAHASH2 1
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.Sh NAME
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.Nm hasher2
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.Nd block based hashing utility
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.Sh SYNOPSIS
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.Nm hasher2
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.Op Fl dDheBrkv
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.Op Fl a Ar algorithm
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.Op Fl b Ar size
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.Op Fl s Ar string
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.Op Fl i Ar iterations
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.Op Fl S Ar seed
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.Op Fl f Ar from
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.Op Fl t Ar to
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.Op [file] ...
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.Sh DESCRIPTION
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This program is part of the radare project.
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.Pp
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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.
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.Pp
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You can hash big files by hashing each block and later determine what part of it has been modified. Useful for filesystem analysis.
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.Pp
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This command can be used to calculate hashes of a certain part of a file or a command line passed string.
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.Pp
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This is the command used by the '#' command of radare.
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.Bl -tag -width Fl
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.It Fl a Ar algo
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Select an algorithm for the hashing. Valid values are listed in: rahash2 -L
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.It Fl b Ar blocksize
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Define the block size
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.It Fl d
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encoDe base64 string or file
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.It Fl D
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Decode base64 string or file
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.It Fl e
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Use little endian to display checksums
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.It Fl i Ar iters
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Apply the hash Iters times to itself+seed
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.It Fl B
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Show per-block hash
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.It Fl k
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Show result using OpenSSH's VisualHostKey randomart algorithm
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.It Fl s Ar string
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Hash this string instead of using the 'source' and 'hash-file' arguments.
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.It Fl S Ar [^]s:string|hexstr
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Set seed to hash with, use ^to prefix seed, otherwise its suffixed.
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.It Fl f Ar from
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Start hashing at given address
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.It Fl t Ar to
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Stop hashing at given address
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.It Fl r
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Show output in radare commands
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.It Fl v
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Show version information
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.It Fl h
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Show usage help message.
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.El
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.Sh SEE ALSO
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.Pp
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.Xr radare2(1) ,
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.Xr rafind2(1) ,
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.Xr rahash2(1) ,
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.Xr rabin2(1) ,
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.Xr radiff2(1) ,
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.Xr rasm2(1) ,
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.Xr ragg2(1) ,
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.Xr rarun2(1) ,
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.Xr rax2(1) ,
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.Sh AUTHORS
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.Pp
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pancake <pancake@nopcode.org>
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