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(Ruby) Twofish CFB Mode EncryptionDemonstrates how to encrypt using Twofish CFB (Cipher Feedback) mode.
require 'chilkat' # This example assumes the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. crypt = Chilkat::CkCrypt2.new() crypt.put_CryptAlgorithm("twofish") crypt.put_CipherMode("cfb") crypt.put_KeyLength(256) # EncodingMode specifies the encoding of the output for # encryption, and the input for decryption. # It may be "hex", "url", "base64", "quoted-printable", or many other choices. crypt.put_EncodingMode("hex") ivHex = "000102030405060708090A0B0C0D0E0F" crypt.SetEncodedIV(ivHex,"hex") # The secret key must equal the size of the key. For # 256-bit encryption, the binary secret key is 32 bytes. keyHex = "603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4" crypt.SetEncodedKey(keyHex,"hex") # Encrypt a string... encStr = crypt.encryptStringENC("We must face the fact that the preservation of individual freedom is incompatible with a full satisfaction of our views of distributive justice. -- Friedrich Hayek") print encStr + "\n"; decrypt = Chilkat::CkCrypt2.new() decrypt.put_CryptAlgorithm("twofish") decrypt.put_CipherMode("cfb") decrypt.put_KeyLength(256) decrypt.put_EncodingMode("hex") decrypt.SetEncodedIV(ivHex,"hex") decrypt.SetEncodedKey(keyHex,"hex") # Now decrypt: decStr = decrypt.decryptStringENC(encStr) print decStr + "\n"; |
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