sun.security.x509

Class AlgorithmId

java.lang.Object

sun.security.x509.AlgorithmId

All Implemented Interfaces:

Serializable

public class AlgorithmId
extends Object
implements Serializable

Use this class to get OID of supported algorithms see get(String) The OID is handled in it's String format in this class. example 1.2.840.113549.1.1.11 for "SHA256withRSA"

Author:

David Brownell, Amit Kapoor, Hemma Prafullchandra

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AlgorithmId(String oid) Constructs a parameterless algorithm ID.

Method Summary

Modifier and Type	Method and Description
boolean	equals(AlgorithmId other) Returns true iff the argument indicates the same algorithm with the same parameters.
boolean	equals(Object other) Compares this AlgorithmID to another.
boolean	equals(String id) Compares two algorithm IDs for equality.
static AlgorithmId	get(String algname) Returns one of the algorithm IDs most commonly associated with this algorithm name.
static String	getDigAlgFromSigAlg(String signatureAlgorithm) Extracts the digest algorithm name from a signature algorithm name.
static String	getEncAlgFromSigAlg(String signatureAlgorithm) Extracts the encryption algorithm name from a signature algorithm name.
String	getOID() Returns the ISO OID for this algorithm.
int	hashCode() Returns a hashcode for this AlgorithmId.
static String	makeSigAlg(String digAlg, String encAlg) Creates a signature algorithm name from a digest algorithm name and a encryption algorithm name.

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AlgorithmId

public AlgorithmId(String oid)

Constructs a parameterless algorithm ID.

Parameters:

oid - the identifier for the algorithm

Method Detail

equals

public boolean equals(AlgorithmId other)

Returns true iff the argument indicates the same algorithm with the same parameters.

Parameters:

other -

Returns:

equals

public boolean equals(@Nullable
                      Object other)

Compares this AlgorithmID to another. If algorithm parameters are available, they are compared. Otherwise, just the object IDs for the algorithm are compared.

Overrides:

equals in class Object

Parameters:

other - preferably an AlgorithmId, else an ObjectIdentifier

Returns:

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

See Also:

Object.hashCode(), HashMap

equals

public final boolean equals(String id)

Compares two algorithm IDs for equality. Returns true iff they are the same algorithm, ignoring algorithm parameters.

get

public static AlgorithmId get(String algname)
                       throws NoSuchAlgorithmException

Returns one of the algorithm IDs most commonly associated with this algorithm name.

Parameters:

algname - the name being used

Throws:

NoSuchAlgorithmException - on error.

getDigAlgFromSigAlg

public static String getDigAlgFromSigAlg(String signatureAlgorithm)

Extracts the digest algorithm name from a signature algorithm name.

getEncAlgFromSigAlg

public static String getEncAlgFromSigAlg(String signatureAlgorithm)

Extracts the encryption algorithm name from a signature algorithm name.

getOID

public final String getOID()

Returns the ISO OID for this algorithm. This is usually converted to a string and used as part of an algorithm name, for example "OID.1.3.14.3.2.13" style notation. Use the getName call when you do not need to ensure cross-system portability of algorithm names, or need a user friendly name.

Returns:

hashCode

public int hashCode()

Returns a hashcode for this AlgorithmId.

Overrides:

hashCode in class Object

Returns:

a hashcode for this AlgorithmId.

See Also:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

makeSigAlg

public static String makeSigAlg(String digAlg,
                                String encAlg)

Creates a signature algorithm name from a digest algorithm name and a encryption algorithm name.