Package com.nimbusds.jose.crypto

Class DirectEncrypter

    • Constructor Detail

      • DirectEncrypter

        public DirectEncrypter​(SecretKey key)
                throws KeyLengthException
        Creates a new direct encrypter.
        Parameters:
        key - The symmetric key. Its algorithm should be "AES". Must be 128 bits (16 bytes), 192 bits (24 bytes), 256 bits (32 bytes), 384 bits (48 bytes) or 512 bits (64 bytes) long. Must not be null.
        Throws:
        KeyLengthException - If the symmetric key length is not compatible.

      • DirectEncrypter

        public DirectEncrypter​(byte[] keyBytes)
                throws KeyLengthException
        Creates a new direct encrypter.
        Parameters:
        keyBytes - The symmetric key, as a byte array. Must be 128 bits (16 bytes), 192 bits (24 bytes), 256 bits (32 bytes), 384 bits (48 bytes) or 512 bits (64 bytes) long. Must not be null.
        Throws:
        KeyLengthException - If the symmetric key length is not compatible.

      • DirectEncrypter

        public DirectEncrypter​(OctetSequenceKey octJWK)
                throws KeyLengthException
        Creates a new direct encrypter.
        Parameters:
        octJWK - The symmetric key, as a JWK. Must be 128 bits (16 bytes), 192 bits (24 bytes), 256 bits (32 bytes), 384 bits (48 bytes) or 512 bits (64 bytes) long. Must not be null.
        Throws:
        KeyLengthException - If the symmetric key length is not compatible.

    • Method Detail

      • encrypt

        @Deprecated
public JWECryptoParts encrypt​(JWEHeader header,
                              byte[] clearText)
                       throws JOSEException
        Deprecated.
        Encrypts the specified clear text of a JWE object.
        Parameters:
        header - The JSON Web Encryption (JWE) header. Must specify a supported JWE algorithm and method. Must not be null.
        clearText - The clear text to encrypt. Must not be null.
        Returns:
        The resulting JWE crypto parts.
        Throws:
        JOSEException - If the JWE algorithm or method is not supported or if encryption failed for some other internal reason.

      • encrypt

        public JWECryptoParts encrypt​(JWEHeader header,
                              byte[] clearText,
                              byte[] aad)
                       throws JOSEException
        Description copied from interface: JWEEncrypter
        Encrypts the specified clear text of a JWE object.
        Specified by:
        encrypt in interface JWEEncrypter
        Parameters:
        header - The JSON Web Encryption (JWE) header. Must specify a supported JWE algorithm and method. Must not be null.
        clearText - The clear text to encrypt. Must not be null.
        aad - The additional authenticated data. Must not be null.
        Returns:
        The resulting JWE crypto parts.
        Throws:
        JOSEException - If the JWE algorithm or method is not supported or if encryption failed for some other internal reason.

      • supportedJWEAlgorithms

        public Set<JWEAlgorithm> supportedJWEAlgorithms()
        Description copied from interface: JWEProvider
        Returns the names of the supported algorithms by the JWE provider instance. These correspond to the alg JWE header parameter.
        Specified by:
        supportedJWEAlgorithms in interface JWEProvider
        Returns:
        The supported JWE algorithms, empty set if none.

      • supportedEncryptionMethods

        public Set<EncryptionMethod> supportedEncryptionMethods()
        Description copied from interface: JWEProvider
        Returns the names of the supported encryption methods by the JWE provier. These correspond to the enc JWE header parameter.
        Specified by:
        supportedEncryptionMethods in interface JWEProvider
        Returns:
        The supported encryption methods, empty set if none.

      • getJCAContext

        public JWEJCAContext getJCAContext()
        Description copied from interface: JCAAware
        Returns the Java Cryptography Architecture (JCA) context. May be used to set a specific JCA security provider or secure random generator.
        Specified by:
        getJCAContext in interface JCAAware<JWEJCAContext>
        Returns:
        The JCA context. Not null.

      • isCEKProvided

        protected boolean isCEKProvided()
        Returns true if a content encryption key (CEK) was provided at construction time.
        Returns:
        true if a CEK was provided at construction time, false if CEKs will be internally generated.

      • getCEK

        protected SecretKey getCEK​(EncryptionMethod enc)
                    throws JOSEException
        Returns the content encryption key (CEK) to use. Unless a CEK was provided at construction time this will be a new internally generated CEK.
        Parameters:
        enc - The encryption method. Must not be null.
        Returns:
        The content encryption key (CEK).
        Throws:
        JOSEException - If an internal exception is encountered.