java.lang.Object
java.security.KeyPair
- All Implemented Interfaces:
- Serializable
- See Also:
- Top Examples, Source Code,
PublicKey,
PrivateKey
public PrivateKey getPrivate()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public PublicKey getPublic()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public KeyPair(PublicKey publicKey,
PrivateKey privateKey)- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
[1387]Public and private key
By Anonymous on 2005/04/12 09:43:10 Rate
class getByte {
public static void main ( String a [ ] ) {
try {
String algorithm = "DSA"; // or RSA, DH, etc.
// Generate a 1024-bit Digital Signature Algorithm ( DSA ) key pair
KeyPairGenerator keyGen = KeyPairGenerator.getInstance ( algorithm ) ;
keyGen.initialize ( 1024 ) ;
KeyPair keypair = keyGen.genKeyPair ( ) ;
PrivateKey privateKey = keypair.getPrivate ( ) ;
PublicKey publicKey = keypair.getPublic ( ) ;
// Get the bytes of the public and private keys
byte [ ] privateKeyBytes = privateKey.getEncoded ( ) ;
byte [ ] publicKeyBytes = publicKey.getEncoded ( ) ;
// Get the formats of the encoded bytes
String format = privateKey.getFormat ( ) ; // PKCS#8
format = publicKey.getFormat ( ) ; // X.509
// The bytes can be converted back to public and private key objects
KeyFactory keyFactory = KeyFactory.getInstance ( algorithm ) ;
EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec ( privateKeyBytes ) ;
PrivateKey privateKey2 = keyFactory.generatePrivate ( privateKeySpec ) ;
EncodedKeySpec publicKeySpec = new X509EncodedKeySpec ( publicKeyBytes ) ;
PublicKey publicKey2 = keyFactory.generatePublic ( publicKeySpec ) ;
// The orginal and new keys are the same
boolean same = privateKey.equals ( privateKey2 ) ; // true
same = publicKey.equals ( publicKey2 ) ; // true
} catch ( InvalidKeySpecException e ) {
} catch ( NoSuchAlgorithmException e ) {
}
}
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