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java.lang.Object net.rim.device.api.crypto.DHPublicKey
public final class DHPublicKey
Represents a public key in an DiffieHellman (DH) system.
DiffieHellman ( DH ) is defined in PKCS #3 and various other spots.
The DHPrivateKey
and DHPublicKey
classes make up a DiffieHelman key pair.
DHCryptoSystem
,
DHPrivateKey
Constructor Summary  


DHPublicKey(DHCryptoSystem cryptoSystem,
byte[] data)
Constructs a DHPublicKey object under the given crypto system using the
given data as the public key's mathematical representation. 


DHPublicKey(DHCryptoSystem cryptoSystem,
CryptoTokenPublicKeyData cryptoTokenData)
Constructs a DHPrivateKey object under the given crypto system associated with the given crypto token. 
Method Summary  


boolean 
equals(Object obj)
Indicates whether some other object is "equal to" this one. 

String 
getAlgorithm()
Returns a string containing the name of the algorithm associated with this key ("DH"). 

CryptoSystem 
getCryptoSystem()
Returns the crypto system associated with the key. 

CryptoTokenPublicKeyData 
getCryptoTokenData()
Returns the DH crypto token public key data. 

DHCryptoSystem 
getDHCryptoSystem()
Returns the DH crypto system associated with the key. 

DHCryptoToken 
getDHCryptoToken()
Returns the DH crypto token. 

byte[] 
getPublicKeyData()
Returns a copy of the public key data. 

int 
hashCode()
Returns a hash code value for the object. 

void 
verify()
Checks the integrity of the associated CryptoSystem , and then
performs integrity checks on the public key parameters. 
Methods inherited from class java.lang.Object 

getClass, notify, notifyAll, toString, wait, wait, wait 
Constructor Detail 

public DHPublicKey(DHCryptoSystem cryptoSystem, byte[] data) throws InvalidKeyException, CryptoTokenException, CryptoUnsupportedOperationException
DHPublicKey
object under the given crypto system using the
given data as the public key's mathematical representation.
cryptoSystem
 A DHCryptoSystem
that contains parameters for DH computations.data
 A byte array containing the keying material that is to be used for the public key operations.
InvalidKeyException
 Thrown if the key data is invalid.
CryptoTokenException
 Thrown when a problem occurs with a crypto
token or the crypto token is invalid.
CryptoUnsupportedOperationException
 Thrown when a call is made to
an unsupported operation.public DHPublicKey(DHCryptoSystem cryptoSystem, CryptoTokenPublicKeyData cryptoTokenData)
DHPrivateKey
object under the given crypto system associated with the given crypto token.
cryptoSystem
 A DHCryptoSystem
that contains parameters for the DH computations.cryptoTokenData
 The data associated and contained within with the
crypto token.Method Detail 

public String getAlgorithm()
This method will always return the String "DH".
getAlgorithm
in interface Key
public DHCryptoSystem getDHCryptoSystem()
getDHCryptoSystem
in interface DHKey
public CryptoSystem getCryptoSystem()
getCryptoSystem
in interface PublicKey
public void verify() throws InvalidKeyException, InvalidCryptoSystemException, CryptoTokenException, CryptoUnsupportedOperationException
CryptoSystem
, and then
performs integrity checks on the public key parameters. The CryptoSystem
is checked via its verify()
method, and then the following
are verified:
verify
in interface PublicKey
InvalidKeyException
 Thrown if the public key parameters are invalid.
InvalidCryptoSystemException
 Thrown if the crypto system
parameters are invalid.
CryptoTokenException
 Thrown if an error occurs with the crypto
token or the crypto token is invalid.
CryptoUnsupportedOperationException
 Thrown if a call is made to
an unsupported operation.public byte[] getPublicKeyData() throws CryptoTokenException, CryptoUnsupportedOperationException
CryptoTokenException
 Thrown when a problem occurs with a crypto
token or the crypto token is invalid.
CryptoUnsupportedOperationException
 Thrown when a call is made to
an unsupported operation.public DHCryptoToken getDHCryptoToken()
public CryptoTokenPublicKeyData getCryptoTokenData()
The public key data associated with the crypto token.
public int hashCode()
Object
java.util.Hashtable
.
The general contract of hashCode
is:
hashCode
method on each of
the two objects must produce the same integer result.
Object.equals(java.lang.Object)
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 hashtables.
As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java^{TM} programming language.)
hashCode
in class Object
Object.equals(java.lang.Object)
,
Hashtable
public boolean equals(Object obj)
Object
The equals
method implements an equivalence relation:
x
,
x.equals(x)
should return true
.
x
and
y
, x.equals(y)
should return
true
if and only if y.equals(x)
returns
true
.
x
,
y
, and z
, if x.equals(y)
returns true
and y.equals(z)
returns
true
, then x.equals(z)
should return
true
.
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 object is modified.
x
,
x.equals(null)
should return false
.
The equals method for class Object
implements
the most discriminating possible equivalence relation on objects;
that is, for any reference values x
and y
,
this method returns true
if and only if x
and
y
refer to the same object (x==y
has the
value true
).
equals
in class Object
obj
 the reference object with which to compare.
true
if this object is the same as the obj
argument; false
otherwise.Boolean.hashCode()
,
Hashtable


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