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REOP(1) General Commands Manual REOP(1)

reopreasonable expectation of privacy

reop -D -x encfile

reop -E [-1b] [-i ident] -m message -p pubkey -s seckey

reop -S [-e] [-x sigfile] -s seckey -m message

reop -V [-eq] [-x sigfile] -p pubkey -m message

The reop utility creates and verifies cryptographic signatures and encrypts and decrypts files. The mode of operation is selected with the following options:

Decryption, both public key and symmetric.
Encryption, both public key and symmetric. When run without a public key, will ask for a password and perform symmetric encryption.

When run with a public key, will encrypt the message so that it can be decrypted by the matching secret key. Public key encryption also uses encryptor's secret key to authenticate the message. Once encrypted, the message can only be decrypted by recipient's secret key. Although authenticated, messages are deniable (forgeable by recipient).

Generate a new key pair.
Sign the specified message file and create a signature.
Verify the message and signature match.

The other options are as follows:

Encrypt messages using older v1 format.
Use a binary format for encrypted files. This can result in a considerable space savings over the default base64 encoded format. Decryption automatically detects the correct format.
When signing, create a signed message instead of just a signature.
ident
Specify the ident to be created during key generation or looked up when using public cryptography.
message
When signing, the file containing the message to sign. When verifying, the file containing the message to verify. When encrypting or decrypting, the plaintext.
Do not ask for a passphrase during key generation. Otherwise, reop will prompt the user for a passphrase to protect the secret key.
pubkey
Public key produced by -G, and used by other commands.
Quiet mode. Suppress informational output.
seckey
Secret (private) key produced by -G, and used by other commands.
xfile
The signature file to create or verify. The default is message.sig. When encrypting, the encrypted file. The default is message.enc.

The key and data files created by reop have similar format. A plain text line of the form ident: is used to match key pairs. Most of the actual key data follows and is base64 encoded.

The ~/.reop directory is searched for default keys named:

seckey
User's secret key
pubkey
User's public key
pubkeyring
User's set trusted of trusted third party keys, searched by ident.

The reop utility exits 0 on success, and >0 if an error occurs. It may fail because of one of the following reasons:

Create a new key pair.

$ reop -G -p newkey.pub -s newkey.sec

Create a new key pair, assuming the ~/.reop directory exists:

$ reop -G

Sign a file, specifying a signature name:

$ reop -S -s key.sec -m message.txt -x msg.sig

Verify a signed message, using the default identity:

$ reop -V -x generalsorders.sig
March 16, 2014 man