org.apache.harmony.security.x509

Class AlgorithmIdentifier

java.lang.Object

org.apache.harmony.security.x509.AlgorithmIdentifier

public final class AlgorithmIdentifier
extends Object

The class encapsulates the ASN.1 DER encoding/decoding work with the Algorithm Identifier which is a part of X.509 certificate (as specified in RFC 3280 - Internet X.509 Public Key Infrastructure. Certificate and Certificate Revocation List (CRL) Profile. http://www.ietf.org/rfc/rfc3280.txt):

  AlgorithmIdentifier ::= SEQUENCE {
      algorithm OBJECT IDENTIFIER,
      parameters ANY DEFINED BY algorithm OPTIONAL
  }
 

Field Summary

Fields

Modifier and Type	Field and Description
static ASN1Sequence	ASN1 Custom AlgorithmIdentifier DER encoder/decoder

Constructor Summary

Constructors

Constructor and Description
AlgorithmIdentifier(String algorithm)
AlgorithmIdentifier(String algorithm, byte[] parameters)
AlgorithmIdentifier(String algorithm, String algorithmName) For testing when algorithmName is not known, but algorithm OID is.

Method Summary

Modifier and Type	Method and Description
void	dumpValue(StringBuilder sb)
boolean	equals(Object ai) Compares this instance with the specified object and indicates if they are equal.
String	getAlgorithm() Returns the value of algorithm field of the structure.
String	getAlgorithmName() Returns the name of the algorithm corresponding to its OID.
byte[]	getEncoded() Returns ASN.1 encoded form of this X.509 AlgorithmIdentifier value.
byte[]	getParameters() Returns the value of parameters field of the structure.
int	hashCode() Returns an integer hash code for this object.

Methods inherited from class java.lang.Object

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

Field Detail

ASN1

public static final ASN1Sequence ASN1

Custom AlgorithmIdentifier DER encoder/decoder

Constructor Detail

AlgorithmIdentifier

public AlgorithmIdentifier(String algorithm)

AlgorithmIdentifier

public AlgorithmIdentifier(String algorithm,
                           byte[] parameters)

AlgorithmIdentifier

public AlgorithmIdentifier(String algorithm,
                           String algorithmName)

For testing when algorithmName is not known, but algorithm OID is.

Method Detail

getAlgorithm

public String getAlgorithm()

Returns the value of algorithm field of the structure.

getAlgorithmName

public String getAlgorithmName()

Returns the name of the algorithm corresponding to its OID. If there is no the such correspondence, algorithm OID is returned.

getParameters

public byte[] getParameters()

Returns the value of parameters field of the structure.

getEncoded

public byte[] getEncoded()

Returns ASN.1 encoded form of this X.509 AlgorithmIdentifier value.

equals

public boolean equals(Object ai)

Description copied from class: Object

Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must represent the same object as this instance using a class-specific comparison. The general contract is that this comparison should be reflexive, symmetric, and transitive. Also, no object reference other than null is equal to null.

The default implementation returns true only if this == o. See Writing a correct equals method if you intend implementing your own equals method.

The general contract for the equals and Object.hashCode() methods is that if equals returns true for any two objects, then hashCode() must return the same value for these objects. This means that subclasses of Object usually override either both methods or neither of them.

Overrides:

equals in class Object

Parameters:

ai - the object to compare this instance with.

Returns:

true if the specified object is equal to this Object; false otherwise.

See Also:

Object.hashCode()

hashCode

public int hashCode()

Description copied from class: Object

Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

Note that hash values must not change over time unless information used in equals comparisons also changes.

See Writing a correct hashCode method if you intend implementing your own hashCode method.

Overrides:

hashCode in class Object

Returns:

this object's hash code.

See Also:

Object.equals(java.lang.Object)

dumpValue

public void dumpValue(StringBuilder sb)