class DbchainClient::AESCrypt
Public Class Methods
new()
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# File lib/dbchain_client/aes.rb, line 7 def initialize @cipher = OpenSSL::Cipher.new('AES-256-CBC') end
Public Instance Methods
decrypt(password, secret_data_with_iv)
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# File lib/dbchain_client/aes.rb, line 23 def decrypt(password, secret_data_with_iv) iv_encrypted = Base64::decode64(secret_data_with_iv) iv, encrypted = extract_iv_and_encrypted(iv_encrypted) @cipher.decrypt @cipher.key = Digest::SHA256.digest(password) @cipher.iv = iv @cipher.update(encrypted) + @cipher.final end
encrypt(password, clear_data)
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# File lib/dbchain_client/aes.rb, line 11 def encrypt(password, clear_data) iv = generate_iv @cipher.encrypt @cipher.key = Digest::SHA256.digest(password) @cipher.iv = iv encrypted = @cipher.update(clear_data) + @cipher.final encrypted_with_iv = prefix_iv(iv, encrypted) Base64.strict_encode64(encrypted_with_iv) end
Private Instance Methods
extract_iv_and_encrypted(iv_encrypted)
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# File lib/dbchain_client/aes.rb, line 43 def extract_iv_and_encrypted(iv_encrypted) iv = iv_encrypted[0..15] encrypted = iv_encrypted[16..-1] [iv, encrypted] end
generate_iv()
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# File lib/dbchain_client/aes.rb, line 39 def generate_iv OpenSSL::Random.random_bytes(16) end
prefix_iv(iv, encrypted)
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# File lib/dbchain_client/aes.rb, line 35 def prefix_iv(iv, encrypted) iv + encrypted end