Sha256: 19c8b47f7b0eff50f461f18a85b40efa2ecf2abe614e0693e6daf19bb21695bd
Contents?: true
Size: 820 Bytes
Versions: 7
Compression:
Stored size: 820 Bytes
Contents
# frozen_string_literal: true
module Noise
module Functions
module Cipher
class AesGcm
def encrypt(k, n, ad, plaintext)
cipher = OpenSSL::Cipher::AES.new(256, :GCM).encrypt
cipher.key = k
cipher.iv = nonce_to_bytes(n)
cipher.auth_data = ad
cipher.update(plaintext) + cipher.final + cipher.auth_tag
end
def decrypt(k, n, ad, ciphertext)
cipher = OpenSSL::Cipher::AES.new(256, :GCM).decrypt
cipher.key = k
cipher.iv = nonce_to_bytes(n)
cipher.auth_data = ad
cipher.auth_tag = ciphertext[-16..-1]
cipher.update(ciphertext[0...-16]) + cipher.final
end
def nonce_to_bytes(n)
"\x00" * 4 + format('%16x', n).htb
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems