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oracle.security.crypto.core
Class RSAPublicKey

java.lang.Object
oracle.security.crypto.core.RSAKey
oracle.security.crypto.core.RSAPublicKey

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, java.security.interfaces.RSAKey, java.security.interfaces.RSAPublicKey, java.security.Key, java.security.PublicKey, ASN1Object, Streamable

public class RSAPublicKey

extends RSAKey

implements PublicKey, java.security.interfaces.RSAPublicKey

An RSA public key.

RSA public keys are output in X.509 SubjectPublicKeyInfo format, and this is also the preferred format for input. However, for backwards compatibility reasons, the PKCS #1 RSAPublicKey format is recognized for input as well.

See Also:

Serialized Form

Field Summary

Fields inherited from interface java.security.interfaces.RSAPublicKey

serialVersionUID

Constructor Summary

RSAPublicKey()
Empty constructor.

RSAPublicKey(java.math.BigInteger mod, java.math.BigInteger exp)
Constructs a new RSA public key with the given parameters.

RSAPublicKey(byte[] key)
Constructs a new RSA public key from the given encoding.

RSAPublicKey(java.io.InputStream is)
Creates a new RSAPublicKey from the specified input stream.

Method Summary

java.lang.Object	clone() Creates a deep copy of this RSAPublicKey instance.
void	erase() Erases the key material making the key un-usable.
void	finalize() Erases this object prior to being reclaimed by the garbage collector.
AlgorithmIdentifier	getAlgID() Returns the algorithm identifier for this key.
boolean	getAllowExport() Always returns true.
ASN1Object	getContents() Returns the contents of this key.
byte[]	getEncoded() Returns the encoded form of this key.
java.lang.String	getFormat() Returns a string which indicates the format of this object's encoding.
java.math.BigInteger	getPublicExponent()
void	initialize(AlgorithmIdentifier algID, ASN1Object contents) Initializes this instance from the given algorithm paramters and key contents.
void	input(java.io.InputStream is) Reads an RSA private key from the specified input stream.
boolean	isPublic() Indicates whether this is a public key.
int	length() Length of this object's encoding.
void	output(java.io.OutputStream os) Outputs this object to the specified output stream.
java.lang.String	toString() Returns a string representation of this object.

Methods inherited from class oracle.security.crypto.core.RSAKey

assertAllowExport, getAlgorithm, getBitLength, getExponent, getModulus, modulusLength, readExternal, setBytes, setModulusExponent, writeExternal

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface oracle.security.crypto.core.Key

getAlgorithm, getBitLength

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Methods inherited from interface java.security.interfaces.RSAKey

getModulus

Constructor Detail

RSAPublicKey

public RSAPublicKey()

Empty constructor.

RSAPublicKey

public RSAPublicKey(byte[] key)
             throws java.io.IOException

Constructs a new RSA public key from the given encoding.

Parameters:

key - DER-encoding of an RSA public key

Throws:

java.io.IOException

RSAPublicKey

public RSAPublicKey(java.io.InputStream is)
             throws java.io.IOException

Creates a new RSAPublicKey from the specified input stream.

Throws:

java.io.IOException

RSAPublicKey

public RSAPublicKey(java.math.BigInteger mod,
                    java.math.BigInteger exp)

Constructs a new RSA public key with the given parameters.

Parameters:

mod - The modulus.

exp - The exponent.

Method Detail

getPublicExponent

public java.math.BigInteger getPublicExponent()

Specified by:

getPublicExponent in interface java.security.interfaces.RSAPublicKey

getEncoded

public byte[] getEncoded()

Description copied from interface: Key

Returns the encoded form of this key.

Specified by:

getEncoded in interface java.security.Key

getAllowExport

public boolean getAllowExport()

Always returns true.

Returns:

Whether or not this key's material may be exported in plaintext.

Since:

3.0

See Also:

FIPS_140_2.getAllowKeyExport()

getFormat

public java.lang.String getFormat()

Returns a string which indicates the format of this object's encoding.

Specified by:

getFormat in interface java.security.Key

Returns:

"X.509"

erase

public void erase()

Erases the key material making the key un-usable.

Keys can be erased multiple times with no consequence.

Overrides:

erase in class RSAKey

finalize

public void finalize()

Erases this object prior to being reclaimed by the garbage collector.

Note: There is no guarantee of when, if ever, finalize will be invoked by the Java runtime.

Overrides:

finalize in class java.lang.Object

clone

public java.lang.Object clone()

Creates a deep copy of this RSAPublicKey instance.

Specified by:

clone in class RSAKey

Returns:

A deep clone of the Key instance.

initialize

public void initialize(AlgorithmIdentifier algID,
                       ASN1Object contents)
                throws AlgorithmIdentifierException,
                       InvalidInputException

Description copied from interface: PublicKey

Initializes this instance from the given algorithm paramters and key contents.

Throws:

AlgorithmIdentifierException

InvalidInputException

getAlgID

public AlgorithmIdentifier getAlgID()

Description copied from interface: PublicKey

Returns the algorithm identifier for this key.

getContents

public ASN1Object getContents()

Description copied from interface: PublicKey

Returns the contents of this key.

isPublic

public boolean isPublic()

Indicates whether this is a public key.

Specified by:

isPublic in class RSAKey

Returns:

Always returns true.

toString

public java.lang.String toString()

Returns a string representation of this object.

Overrides:

toString in class java.lang.Object

input

public void input(java.io.InputStream is)
           throws java.io.IOException

Reads an RSA private key from the specified input stream.

Specified by:

input in interface Streamable

Throws:

java.io.IOException

output

public void output(java.io.OutputStream os)
            throws java.io.IOException

Description copied from interface: Streamable

Outputs this object to the specified output stream.

Specified by:

output in interface Streamable

Throws:

java.io.IOException

length

public int length()

Description copied from interface: Streamable

Length of this object's encoding.

Specified by:

length in interface Streamable

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