Common API
java.security.KeyPairGenerator key generator class public static KeyPairGenerator getInstance (String algorithm) throws NoSuchAlgorithmException a specified algorithm returns KeyPairGenerator object Parameters: algorithm, such as algorithm name:. "DSA", "RSA"
Public void Initialize (int keysize)
Initialize the KeypairGenerator object with the specified length, if no initialization system is set by default 1024 length
Parameters: Keysize algorithm is long. The range must be between 512 and 1024, and must be a multiple of 64
Public Void Initialize (int key, secondom random) with the specified length initialization and random generator object parameters: Keysize algorithm is long. The range must be between 512 and 1024, and must be a multiple of 64 Random. Source (for Initialize (int Keysize) used by default
Public Abstract Keypair GenerateKeyPair () Generates a new key pair
Java.Security.KeyPAIR Key Public PrivateKey getPrivate () Returns private key
Public publickey getpublic () Returns public key
Java.security.signature GetInstance (String Algorithm) THROWS NOSUCHALGORITHMEXCEPTION Returns a specified algorithm Signature object parameter algorithm such as "DSA"
Public Final Void INITSIGN (PrivateKey PrivateKey) THROWS INVALIDKEYEXCEPTION uses the specified private key initialization parameter: private key when the privateKey is signed
public final void update (byte data) throws SignatureExceptionpublic final void update (byte [] data) throws SignatureExceptionpublic final void update (byte [] data, int off, int len) throws SignatureException signature information to be added
Public final byte [] sign () THROWS SIGNATureException Returns the array of signatures, provided INITSIGN and UPDATE
Public final void initverify (publickey publickey) THROWS INVALIDKEYEXCEPTION Published parameters with the specified public key: public key used in publickey verification
Public final boolean verify (Byte [] signature) THROWS SIGNATUREXCEPTION Verify that the signature is valid, the premise is already initverify initialization parameters: Signature Signature array
