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## org.bouncycastle.util
Class Fingerprint

    java.lang.Object
      org.bouncycastle.util.Fingerprint

public class Fingerprint
extends java.lang.Object

Basic 20 byte finger print class.

Constructor Summary
`Fingerprint(byte[] source)` Base constructor - use SHAKE-256 (160 bits).
`Fingerprint(byte[] source, boolean useSHA512t)` Deprecated. use the SHAKE only version.
`Fingerprint(byte[] source, int bitLength)` Constructor with length - use SHAKE-256 (bitLength bits).

Method Summary
`static byte[]` | `calculateFingerprint(byte[] input)` Return a byte array containing a calculated fingerprint for the passed in input data.
`static byte[]` | `calculateFingerprint(byte[] input, int bitLength)` Return a byte array containing a calculated fingerprint for the passed in input data.
`static byte[]` | `calculateFingerprintSHA512_160(byte[] input)` Deprecated. use the SHAKE based version.
`boolean` | `equals(java.lang.Object o)`
`byte[]` | `getFingerprint()`
`int` | `hashCode()`
`java.lang.String` | `toString()`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Constructor Detail

### Fingerprint

    public Fingerprint(byte[] source)

  Base constructor - use SHAKE-256 (160 bits). This is the recommended one as it is also produced by the FIPS API.

Parameters:
  `source` - original data to calculate the fingerprint from.

### Fingerprint

    public Fingerprint(byte[] source,
                       int bitLength)

  Constructor with length - use SHAKE-256 (bitLength bits). This is the recommended one as it is also produced by the FIPS API.

Parameters:
  `source` - original data to calculate the fingerprint from.

### Fingerprint

    public Fingerprint(byte[] source,
                       boolean useSHA512t)

  Deprecated. use the SHAKE only version.

  Base constructor - for backwards compatibility.

Parameters:
  `source` - original data to calculate the fingerprint from.
  `useSHA512t` - use the old SHA512/160 calculation.

Method Detail

### getFingerprint

    public byte[] getFingerprint()

### toString

    public java.lang.String toString()

### equals

    public boolean equals(java.lang.Object o)

### hashCode

    public int hashCode()

### calculateFingerprint

    public static byte[] calculateFingerprint(byte[] input)

  Return a byte array containing a calculated fingerprint for the passed in input data. This calculation is compatible with the BC FIPS API.

  Parameters:
    `input` - data to base the fingerprint on.
  Returns:
    a byte array containing a 160 bit fingerprint.

### calculateFingerprint

    public static byte[] calculateFingerprint(byte[] input,
                                              int bitLength)

  Return a byte array containing a calculated fingerprint for the passed in input data. This calculation is compatible with the BC FIPS API.

  Parameters:
    `input` - data to base the fingerprint on.
    `bitLength` - bit length of finger print to be produced.
  Returns:
    a byte array containing a 20 byte fingerprint.

### calculateFingerprintSHA512_160

    public static byte[] calculateFingerprintSHA512_160(byte[] input)

  Deprecated. use the SHAKE based version.

  Return a byte array containing a calculated fingerprint for the passed in input data. The fingerprint is based on SHA512/160.

  Parameters:
    `input` - data to base the fingerprint on.
  Returns:
    a byte array containing a 20 byte fingerprint.

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