Bouncy Castle Cryptography Library 1.80 · org.bouncycastle.util.Fingerprint

Modifier and Type	Field and Description
private static char[]	encodingTable
private final byte[]	fingerprint

Access	Constructor and Description
public	Fingerprint(byte[] original data to calculate the fingerprint from. source) Base constructor - use SHAKE-256 (160 bits).
public	Fingerprint(byte[] original data to calculate the fingerprint from. source, int bitLength) Constructor with length - use SHAKE-256 (bitLength bits).
public	Fingerprint(byte[] original data to calculate the fingerprint from. source, boolean use the old SHA512/160 calculation. useSHA512t) Deprecated use the SHAKE only version. Base constructor - for backwards compatibility.

Method Summary

Modifier and Type	Method and Description
public static byte[]	Returns: a byte array containing a 160 bit fingerprint. calculateFingerprint(byte[] data to base the fingerprint on. input) Return a byte array containing a calculated fingerprint for the passed in input data.
public static byte[]	Returns: a byte array containing a 20 byte fingerprint. calculateFingerprint(byte[] data to base the fingerprint on. input, int bit length of finger print to be produced. bitLength) Return a byte array containing a calculated fingerprint for the passed in input data.
public static byte[]	Returns: a byte array containing a 20 byte fingerprint. calculateFingerprintSHA512_160(byte[] data to base the fingerprint on. input) Deprecated use the SHAKE based version. Return a byte array containing a calculated fingerprint for the passed in input data.
public boolean	equals(Object the reference object with which to compare. o) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public byte[]	getFingerprint()
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll wait wait wait

encodingTable	back to summary
private static char[] encodingTable

fingerprint	back to summary
private final byte[] fingerprint

Fingerprint	back to summary
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:byte[] original data to calculate the fingerprint from.

Fingerprint	back to summary
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:byte[] original data to calculate the fingerprint from.

Fingerprint	back to summary
public Fingerprint(byte[] source, boolean useSHA512t) Deprecated use the SHAKE only version. Base constructor - for backwards compatibility. Parameters source:byte[] original data to calculate the fingerprint from. useSHA512t:boolean use the old SHA512/160 calculation.

Method Detail

calculateFingerprint	back to summary
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:byte[] data to base the fingerprint on. Returns:byte[] a byte array containing a 160 bit fingerprint.

calculateFingerprint

back to summary

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:byte[]: data to base the fingerprint on.

Returns:byte[]

a byte array containing a 160 bit fingerprint.

calculateFingerprint	back to summary
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:byte[] data to base the fingerprint on. bitLength:int bit length of finger print to be produced. Returns:byte[] a byte array containing a 20 byte fingerprint.

calculateFingerprint

back to summary

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:byte[]: data to base the fingerprint on.
bitLength:int: bit length of finger print to be produced.

Returns:byte[]

a byte array containing a 20 byte fingerprint.

calculateFingerprintSHA512_160	back to summary
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:byte[] data to base the fingerprint on. Returns:byte[] a byte array containing a 20 byte fingerprint.

calculateFingerprintSHA512_160

back to summary

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:byte[]: data to base the fingerprint on.

Returns:byte[]

a byte array containing a 20 byte fingerprint.

equals back to summary

equals	back to summary
public boolean equals(Object o) Overrides java.lang.Object.equals. Doc from java.lang.Object.equals. Indicates whether some other object is "equal to" this one. The `equals` method implements an equivalence relation on non-null object references: It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`. It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`. It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`. It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified. For any non-null reference value `x`, `x.equals(null)` should return `false`. An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes. Parameters o:Object the reference object with which to compare. Returns:boolean `true` if this object is the same as the obj argument; `false` otherwise.

public boolean equals(Object o)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters

o:Object: the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

getFingerprint	back to summary
public byte[] getFingerprint()

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. Returns:int a hash code value for this object

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns:int: a hash code value for this object

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Satisfying this method's contract implies a non-`null` result must be returned. Returns:String a string representation of the object

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String: a string representation of the object

public Class Fingerprint

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