rasign2 - radare2 signature management tool

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NAME

rasign2 — radare2 signature management tool

SYNOPSIS

rasign2 [−afjhqrvSm] [−A [AAA]] [−i script.r2] [−o sigs.sdb] [−s signspace] [−c] [file]

DESCRIPTION

Generates, dumps, and manages zignature scripts for function identification and cataloging. Zignatures are Radare2 scripts that capture metadata associated with function signatures.

Supports interpretation of FLIRT ’.sig’ files, execution of zignature scripts, and exporting signatures in various formats.

OPTIONS
−a

Make signatures from all .o files in the provided .a file

−A [AAA]

Same as r2 -A, the more ’A’s the more analysis is performed

−f

Interpret the file as a FLIRT .sig file and dump signatures

−h

Show help menu

−j

Show signatures in json

−i script.r2

Execute this script in the r2 instance

−o sigs.sdb

Add signatures to file, create if it does not exist

−q

Quiet mode

−r

Show output in radare commands

−S

Perform operation on sdb signature file (’-o -’ to save to same file)

−s signspace

Save all signatures under this signspace

−c

Add collision signatures before writing file

−v

Show version information

−m

Merge/overwrite signatures with same name

ENVIRONMENT

rasign2 does not use any environment variables.

EXAMPLES

Generate signatures from a library file:

$ rasign2 -o libc.sdb libc.so.6

Perform deep analysis before generating signatures:

$ rasign2 -AA -o enhanced_libc.sdb libc.so.6

Output signatures in JSON format:

$ rasign2 -j input_file

Show signatures as radare2 commands:

$ rasign2 -r input_file

Merge new signatures into an existing file:

$ rasign2 -m -o existing.sdb new_binary

Extract signatures from a FLIRT .sig file:

$ rasign2 -f flirt_signatures.sig

THE Z COMMAND IN RADARE2

The ’z’ command in radare2 is dedicated to the management of binary signatures, known as zignatures. Here are the key subcommands:

z

Show zignatures

z.

Find matching zignatures in current offset

zb

Search for best match

zd

Diff current function and signature

z*

Show zignatures in radare format

zo

Manage zignature files

zf

Manage FLIRT signatures

z/

Search zignatures

zc

Compare current zignspace zignatures

zs

Manage zignspaces

zi

Show zignatures matching information

These commands facilitate a robust workflow for binary analysis, enabling the identification of known functions and comparing binary similarities.

SUPPORTED ZIGNATURE METRICS

Zignatures in radare2 can be created with various metrics:

a

Bytes pattern (masked)

b

Raw bytes pattern

c

Base64 comment

n

Real function name

g

Graph metrics (complexity, edges, basic blocks)

o

Original offset

r

References

x

Cross references

h

Basic block hashes

v

Variables and arguments

SEE ALSO

radare2(1)

AUTHORS

pancake <[email protected]> Jul 10, 2025 RASIGN2(1)

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