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Javax.Crypto Namespace

This package provides the classes and interfaces for cryptographic applications implementing algorithms for encryption, decryption, or key agreement.

Remarks

This package provides the classes and interfaces for cryptographic applications implementing algorithms for encryption, decryption, or key agreement.

Stream ciphers are supported as well as asymmetric, symmetric and block ciphers. Cipher implementations from different providers can be integrated using the SPI (Service Provider Interface) abstract classes. With class SealedObject a programmer can secure an object by encrypting it with a cipher.

Authentication may be based on MAC (Message Authentication Code) such as HMAC (Hash MAC, i.e. with a SHA-1 hash function).

Classes

TypeReason
AEADBadTagExceptionThrown by a Cipher that is using an Authenticated Encryption with Additional Data (AEAD) mode such as Galois/Counter Mode (GCM) and the tag failed verification.
BadPaddingExceptionThe exception that is thrown when a padding mechanism is expected for the input data, but the input data does not have the proper padding bytes.
CipherThis class provides access to implementations of cryptographic ciphers for encryption and decryption.
CipherInputStreamThis class wraps an InputStream and a cipher so that read() methods return data that are read from the underlying InputStream and processed by the cipher.
CipherModeEnumerates values returned by several types and taken as a parameter of several methods of Cipher.
CipherOutputStreamThis class wraps an output stream and a cipher so that write methods send the data through the cipher before writing them to the underlying output stream.
CipherSpiThis class defines the Service Provider Interface (SPI) for cryptographic ciphers.
EncryptedPrivateKeyInfoThis class implements the EncryptedPrivateKeyInfo ASN.1 type as specified in .
ExemptionMechanismThis class implements the functionality of an exemption mechanism such as key recovery, key weakening, or key escrow.
ExemptionMechanismExceptionThis is the base class for ExemptionMechanismException.
ExemptionMechanismSpiThe Service Provider Interface (SPI) definition for the ExemptionMechanism class.
IllegalBlockSizeExceptionThe exception, that is thrown when the data length provided to a block cipher does not match the block size of the cipher.
ISecretKeyA cryptographic secret (symmetric) key.
KeyAgreementThis class provides the functionality for a key exchange protocol.
KeyAgreementSpiThe Service Provider Interface (SPI) definition for the KeyAgreement class.
KeyGeneratorThis class provides the public API for generating symmetric cryptographic keys.
KeyGeneratorSpiThe Service Provider Interface (SPI) definition for the KeyGenerator class.
KeyTypeEnumerates values returned by several types and taken as a parameter of the Cipher.Unwrap member.
MacThis class provides the public API for Message Authentication Code (MAC) algorithms.
MacSpiThe Service-Provider Interface (SPI) definition for the Mac class.
NoSuchPaddingExceptionThe exception that is thrown when the requested padding mechanism is not supported.
NullCipherThis class provides an identity cipher that does not transform the input data in any way.
SealedObjectA SealedObject is a wrapper around a serializable object instance and encrypts it using a cryptographic cipher.
SecretKeyA cryptographic secret (symmetric) key.
SecretKeyConsts
SecretKeyFactoryThe public API for SecretKeyFactory implementations.
SecretKeyFactorySpiThe Service Provider Interface (SPI) definition for the SecretKeyFactory class.
ShortBufferExceptionThe exception that is thrown when the result of an operation is attempted to store in a user provided buffer that is too small.