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## gnu.crypto.jce.mac
Class HMacSHA160Spi

    java.lang.Object
      |
      +--javax.crypto.MacSpi
            |
            +--gnu.crypto.jce.mac.MacAdapter
                  |
                  +--gnu.crypto.jce.mac.HMacSHA160Spi

public final class HMacSHA160Spi
extends gnu.crypto.jce.mac.MacAdapter

The implementation of the HMAC-SHA-160 Service Provider Interface (SPI) adapter.

Field Summary
`protected java.util.Map` `attributes` Our MAC attributes.
`protected IMac` `mac` Our MAC instance.

Constructor Summary
`HMacSHA160Spi()`

Method Summary
`java.lang.Object` `clone()` Returns a clone if the implementation is cloneable.
`protected byte[]` `engineDoFinal()` Completes the MAC computation and resets the MAC for further use, maintaining the secret key that the MAC was initialized with.
`protected int` `engineGetMacLength()` Returns the length of the MAC in bytes.
`protected void` `engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params)` Initializes the MAC with the given (secret) key and algorithm parameters.
`protected void` `engineReset()` Resets the MAC for further use, maintaining the secret key that the MAC was initialized with.
`protected void` `engineUpdate(byte b)` Processes the given byte.
`protected void` `engineUpdate(byte[] in, int off, int len)` Processes the first `len` bytes in `input`, starting at `offset` inclusive.

Methods inherited from class java.lang.Object
`equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### mac

    protected IMac mac

  Our MAC instance.

### attributes

    protected java.util.Map attributes

  Our MAC attributes.

Constructor Detail

### HMacSHA160Spi

    public HMacSHA160Spi()

Method Detail

### clone

    public java.lang.Object clone()

  Description copied from class: `MacSpi`
  Returns a clone if the implementation is cloneable.

  Overrides:
    `clone` in class `MacSpi`
  Returns:
    a clone if the implementation is cloneable.

### engineDoFinal

    protected byte[] engineDoFinal()

  Description copied from class: `MacSpi`
  Completes the MAC computation and resets the MAC for further use, maintaining the secret key that the MAC was initialized with.

  Specified by:
    `engineDoFinal` in class `MacSpi`
  Returns:
    the MAC result.

### engineGetMacLength

    protected int engineGetMacLength()

  Description copied from class: `MacSpi`
  Returns the length of the MAC in bytes.

  Specified by:
    `engineGetMacLength` in class `MacSpi`
  Returns:
    the MAC length in bytes.

### engineInit

    protected void engineInit(java.security.Key key,
                              java.security.spec.AlgorithmParameterSpec params)
                       throws java.security.InvalidKeyException,
                              java.security.InvalidAlgorithmParameterException

  Description copied from class: `MacSpi`
  Initializes the MAC with the given (secret) key and algorithm parameters.

  Specified by:
    `engineInit` in class `MacSpi`
  Parameters:
    `key` - - the (secret) key.
    `params` - - the algorithm parameters.
  Throws:
    `java.security.InvalidAlgorithmParameterException` - - if the given algorithm parameters are inappropriate for this MAC.
    `java.security.InvalidKeyException` - if the given key is inappropriate for initializing this MAC.

### engineReset

    protected void engineReset()

  Description copied from class: `MacSpi`
  Resets the MAC for further use, maintaining the secret key that the MAC was initialized with.

  Specified by:
    `engineReset` in class `MacSpi`

### engineUpdate

    protected void engineUpdate(byte b)

  Description copied from class: `MacSpi`
  Processes the given byte.

  Specified by:
    `engineUpdate` in class `MacSpi`
  Parameters:
    `b` - - the input byte to be processed.

### engineUpdate

    protected void engineUpdate(byte[] in,
                                int off,
                                int len)

  Description copied from class: `MacSpi`
  Processes the first `len` bytes in `input`, starting at `offset` inclusive.

  Specified by:
    `engineUpdate` in class `MacSpi`
  Parameters:
    `in` - the input buffer.
    `off` - the offset in `input` where the input starts.
    `len` - the number of bytes to process.

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