TTCrypt

TTCrypt is a fast basic cryptography library written in C++ that implements only string encoded RSA variants and othe cryptoprimitives widely used in Thrift/iCodici projects, namely:

• RSAES-OAEP encryption
• RSASS-PSS signing (sha1, sha256 and sha512 are supported)
• Pollard 'rho' factorization
• Fast orime generation
• SHA1, SHA256 and SHA512 hashes

All long operation are being preformed releasing GVL so other ruby threads can execute while ttcrypt thinks.

Changes

After years in production we are added SHA512 signing hash and ability to caclulate hashes for strings - it's faster than using Digest module - at least on reasonable sized sources we use. Also it is possible to specify custom salt size on signature verification (almost never used though).

Installation

Current implementation targeted for MRI ruby 2.0+.

To install your computer should have GMP library installed. Use your target system's packet manager (apt, brew, whatever you have) or get it there: https://gmplib.org

Then, add this line to your application's Gemfile:

gem 'ttcrypt'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ttcrypt

Usage

Very simple, for example:

    private_key = TTCrypt::RsaKey.generate 2048
    public_key = private_key.extract_public
    
    ciphered = public_key.encrypt 'some message'
    decrypted = private_key.decrypt ciphered
    
    signature = private_key.sign 'some message to sign', :sha256
    is_ok = public_key.verify 'some message to sign', signature, :sha256

See online docs for more information.

Contributing

1. Fork it ( https://github.com/[my-github-username]/ttcrypt/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request