/// <summary> /// Initializes a new instance of the <see cref="SessionCrypter" /> class. /// </summary> /// <param name="keyEncrypter">The key encrypter.</param> /// <param name="signer">The signer, optionally used to certify sender. (Equivialent to SignedSessionEncrypter)</param> /// <param name="keySize">Size of the key.</param> /// <param name="symmetricKeyType">Type of the symmetric key. (requires unofficial keypacker)</param> /// <param name="keyPacker">The key packer.</param> /// <exception cref="System.ArgumentException">Without a supplying a keypacker you may only use KeyType.AES;symmetricKeyType</exception> public SessionCrypter(Encrypter keyEncrypter, AttachedSigner signer = null, int?keySize = null, KeyType symmetricKeyType = null, ISessionKeyPacker keyPacker = null) { symmetricKeyType = symmetricKeyType ?? KeyType.Aes; if (keyPacker == null && symmetricKeyType != KeyType.Aes) { throw new ArgumentException("Without a supplying a keypacker you may only use KeyType.AES", "symmetricKeyType"); } if (signer != null) { keyPacker = keyPacker ?? new NonceSignedSessionPacker(); } keyPacker = keyPacker ?? new SimpleAesHmacSha1KeyPacker(); var key = Key.Generate(symmetricKeyType, keySize ?? symmetricKeyType.DefaultSize); _keyset = new ImportedKeySet(key, KeyPurpose.DecryptAndEncrypt); _crypter = new Crypter(_keyset); _signer = signer; byte[] packedKey; var sessionPacker = keyPacker as IInteroperableSessionMaterialPacker; if (sessionPacker == null) { packedKey = keyPacker.Pack(key); } else { var nonceSession = new NonceSessionMaterial((AesKey)key); packedKey = sessionPacker.PackMaterial(nonceSession); _nonce = nonceSession.Nonce.ToBytes(); } _sessionMaterial = WebBase64.FromBytes(keyEncrypter.Encrypt(packedKey)); if (sessionPacker == null && _signer != null) { _sessionMaterial = WebBase64.FromBytes(_signer.Sign(_sessionMaterial.ToBytes())); } }
/// <summary> /// Initializes a new instance of the <see cref="EncryptedKeySetWriter"/> class. /// </summary> /// <param name="writer">The writer.</param> /// <param name="encrypter">The encrypter.</param> public EncryptedKeySetWriter(IKeySetWriter writer, Encrypter encrypter) { _encrypter = encrypter; _writer = writer; }
public static Func <IKeySetWriter, EncryptedKeySetWriter> Creator(Encrypter encrypter) { return(writer => new EncryptedKeySetWriter(writer, encrypter)); }