GPG: Decrypt BLOWFISH encrypted file

Question

I have received encrypted files from someone who used something called omziff to encrypt using BLOWFISH cipher. When I try to decrypt this using GPG like so:

gpg -d --cipher-algo BLOWFISH file.txt

I get the following error message:

gpg: no valid OpenPGP data found.
gpg: decrypt_message failed: eof

When I query GPG for supported ciphers, I see blowfish in that list:

gpg (GnuPG) 1.4.11
...
Cipher: 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH, CAMELLIA128, 
    CAMELLIA192, CAMELLIA256
Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2

Thanks for any pointers.

-Raj

Answer 1

Your file needs to be in PGP format for GPG to recognize it. It's unlikely you'd be able to decrypt this file using GPG.