Command line binary

[hardbyte]

To aide testing integration between python-paillier and javallier, add a command line program to:

• generate and serialize key pairs (of different key sizes)
• encrypt and serialize given a public key and a plaintext number
• decrypt given a private key and the ciphertext
• add two encrypted numbers together
• add an encrypted number to a plaintext number
• multiply an encrypted number to a plaintext number

Initially use a standard encoding scheme.

Associated issue on python-paillier#6.

[hardbyte]

Apache commons provides a useful library to help: https://commons.apache.org/proper/commons-cli/usage.html

[mpnd]

CLI has been included in master branch as of dcdb3c8.

I notice the following issues:

• It cannot encrypt negative number (Issue Unable to encrypt negative number using CLI #34). The main problem is it can't properly read negative number from the command line, even after following the note in the help menu.
• Some options are inconsistent (Issue Inconsistent CLI options #35). Using -v and --verbose gives different results. Likewise for -h and --help.
• It currently only supports one type of Paillier Context (Issue PaillierContext in CLI #36). Ideally users should be able to provide a specific Paillier Context set up.