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NAME rahash2 -- Block-Based Hashing, Encoding, and Encryption Utility SYNOPSIS rahash2 [-BehjkLqRrvX] [-b S] [-a A] [-c H] [-E A] [-D A] [-s S] [-f O] [-t O] [-i num] [-I iv] [-S seed] [-x hexstr] [file ...] DESCRIPTION A utility for computing, verifying, and displaying hash values for each block of a file, with a default block size of 32768 bytes. Reads from stan- dard input using '-' and supports comparison against known hashes via exit status codes. Commonly used for forensic analysis, detecting file modifications, and ef- ficient processing of large files. Supports entropy calculation, targeted hashing of file segments or strings, and encoding, decoding, encryption, and decryption using various crypto- graphic algorithms. -a algo Comma separated list of algorithms (default is 'sha256') -b bsize Specify the size of the block (instead of full file) -B Show per-block hash -c hash Compare with this hash -e Swap endian (use little endian) -E algo Encrypt. Use -S to set key and -I to set IV -D algo Decrypt. Use -S to set key and -I to set IV -f from Start hashing at given address -i num Repeat hash N iterations (f.ex: 3DES) -I iv Use give initialization vector (IV) (hexa or s:string) -j Output in json -J New simplified json output (same as -jj) -S seed Use given seed (hexa or s:string) use ^ to prefix (key for -E) (- will slurp the key from stdin, the @ prefix points to a file -k Show hash using the openssh's randomkey algorithm -q Run in quiet mode (-qq to show only the hash) -L List muta plugins (combines with -q, used by -a, -E and -D) -r Output radare commands (comments), for example: $ rahash2 -a sha1 -r file | r2 -qni file -R Output radare2 sdb commands to store hashes under file.<algo> keys (works with any algorithm name), for example: $ rahash2 -a sha1 -R file | r2 -qni file rahash2 -R is incompatible with -B (per-block hashing). -s string Hash this string instead of files -t to Stop hashing at given address -x hexstr Hash this hexpair string instead of files -X Output in hexpairs instead of binary/plain -v Show version information ENVIRONMENT Rahash2 does not use any environment variables. EXAMPLES Calculate the MD5 hash of the 'ls' binary: $ rahash2 -qqa md5 /bin/ls Calculate the SHA256 hash of string from stdin: $ echo -n "Hello, World" | rahash2 -a sha256 - $ rahash2 -a sha256 -s "Hello, World" Compare CRC32 of the given file didnt changed: $ rahash2 -qqa crc32 /bin/ls 63212007 $ rahash2 -a crc32 -c 63212007 /bin/ls INFO: Computed hash matches the expected one $ echo $? 0 List all muta (hash, crypto, encoder, charset) plugins: $ rahash2 -L Encode the string "Hello World" with base64: $ rahash2 -E base64 -s "Hello World" Calculate SHA256 hash of a specific part of a file: $ rahash2 -qqa sha256 -f 0x1000 -t 0x2000 file_to_hash Encrypt and decrypt the "hello" string using the ror and rol plugins: $ rahash2 -S 12333 -E ror -s hello && echo Cell{ $ rahash2 -S 12333 -E rol -s Cell{ && echo hello Encrypting and decrypting using AES-CBC: $ export AES_KEY="11111111111111111111111111113211" $ rahash2 -E aes-ecb -S "$AES_KEY" -s "hello world you bastard" > .file $ cat .file | rahash2 -D aes-ecb -S "$AES_KEY" -s - && echo Encrypting a file using Blowfish and encode it into a json: $ rahash2 -E blowfish -S "11111111111111111111111111113211" -j /bin/ls > ls.json DIAGNOSTICS The rahash2 utility exits 0 on success, and >0 if an error occurs. When using the -c flag, an exit status of 0 indicates a match between the expected and computed hashes. SEE ALSO radare2(1) AUTHORS pancake <pancake@nopcode.org> Jul 10, 2025 RAHASH2(1)
NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | EXAMPLES | DIAGNOSTICS | SEE ALSO | AUTHORS
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