Курсовая работа: Анализ предметной области

return(info);

}

public static boolean CreateDigitalSignatureForFile(String puth)

{

try

{

KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA", "SUN");

SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");

keyGen.initialize(1024, random);

KeyPair pair = keyGen.generateKeyPair();

PrivateKey priv = pair.getPrivate();

PublicKey pub = pair.getPublic();

Signature dsa = Signature.getInstance("SHA1withDSA", "SUN");

dsa.initSign(priv);

FileInputStream fis = new FileInputStream(puth);

BufferedInputStream bufin = new BufferedInputStream(fis);

byte[] buffer = new byte[1024];

int len;

while (bufin.available() != 0)

{

len = bufin.read(buffer);

dsa.update(buffer, 0, len);

}

bufin.close();

byte[] realSig = dsa.sign();

saveToFile (realSig,puth+".sig");

byte[] key = pub.getEncoded();

saveToFile (key,puth+".pubkey");

//byte[] priv_key = priv.getEncoded();