Package org.bouncycastle.crypto.encodings

Class PKCS1Encoding

  • All Implemented Interfaces:
    AsymmetricBlockCipher
    public class PKCS1Encoding
extends java.lang.Object
implements AsymmetricBlockCipher
    this does your basic PKCS 1 v1.5 padding - whether or not you should be using this depends on your application - see PKCS1 Version 2 for details.

    • Field Detail

      • STRICT_LENGTH_ENABLED_PROPERTY

        public static final java.lang.String STRICT_LENGTH_ENABLED_PROPERTY
        Deprecated.
        use NOT_STRICT_LENGTH_ENABLED_PROPERTY
        See Also:
        Constant Field Values

      • NOT_STRICT_LENGTH_ENABLED_PROPERTY

        public static final java.lang.String NOT_STRICT_LENGTH_ENABLED_PROPERTY
        some providers fail to include the leading zero in PKCS1 encoded blocks. If you need to work with one of these set the system property org.bouncycastle.pkcs1.not_strict to true.

        The system property is checked during construction of the encoding object, it is set to false by default.

        See Also:
        Constant Field Values

    • Constructor Detail

      • PKCS1Encoding

        public PKCS1Encoding​(AsymmetricBlockCipher cipher)
        Basic constructor.
        Parameters:
        cipher -

      • PKCS1Encoding

        public PKCS1Encoding​(AsymmetricBlockCipher cipher,
                     int pLen)
        Constructor for decryption with a fixed plaintext length.
        Parameters:
        cipher - The cipher to use for cryptographic operation.
        pLen - Length of the expected plaintext.

      • PKCS1Encoding

        public PKCS1Encoding​(AsymmetricBlockCipher cipher,
                     byte[] fallback)
        Constructor for decryption with a fixed plaintext length and a fallback value that is returned, if the padding is incorrect.
        Parameters:
        cipher - The cipher to use for cryptographic operation.
        fallback - The fallback value, we don't do an arraycopy here.

    • Method Detail

      • init

        public void init​(boolean forEncryption,
                 CipherParameters param)
        Description copied from interface: AsymmetricBlockCipher
        initialise the cipher.
        Specified by:
        init in interface AsymmetricBlockCipher
        Parameters:
        forEncryption - if true the cipher is initialised for encryption, if false for decryption.
        param - the key and other data required by the cipher.

      • getOutputBlockSize

        public int getOutputBlockSize()
        Description copied from interface: AsymmetricBlockCipher
        returns the maximum size of the block produced by this cipher.
        Specified by:
        getOutputBlockSize in interface AsymmetricBlockCipher
        Returns:
        maximum size of the output block produced by the cipher.

      • processBlock

        public byte[] processBlock​(byte[] in,
                           int inOff,
                           int inLen)
                    throws InvalidCipherTextException
        Description copied from interface: AsymmetricBlockCipher
        process the block of len bytes stored in in from offset inOff.
        Specified by:
        processBlock in interface AsymmetricBlockCipher
        Parameters:
        in - the input data
        inOff - offset into the in array where the data starts
        inLen - the length of the block to be processed.
        Returns:
        the resulting byte array of the encryption/decryption process.
        Throws:
        InvalidCipherTextException - data decrypts improperly.