import java.io.File;
import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.Signature;
import java.util.Enumeration;

import javax.security.cert.Certificate;
import javax.security.cert.X509Certificate;

import com.sun.org.apache.xml.internal.security.utils.Base64;

public class Test {
	public static void main(String[] args) {
		String str =sign();
		verify(str);
	}

	public static String sign() {
		
		PrivateKey keyOfSigner=null;
		java.security.cert.Certificate certOfSigner=null;
		try{
		File file = new File("F:/pro.pfx");
		FileInputStream fis = new FileInputStream(file);
		KeyStore keyStore = KeyStore.getInstance("PKCS12");
		keyStore.load(fis, "password".toCharArray());
		fis.close();
		
		Enumeration enums = keyStore.aliases();
		while (enums.hasMoreElements()) {
			String keyAlias = (String) enums.nextElement();
			if (keyStore.isKeyEntry(keyAlias)) {
				 keyOfSigner = (PrivateKey) keyStore.getKey(keyAlias,
						"password".toCharArray());
				certOfSigner =keyStore.getCertificate(keyAlias);
			}
		}
		
		
		byte[] encryptedDigest;
			Signature signature = Signature.getInstance("SHA1withRSA");
			signature.initSign(keyOfSigner);
			signature.update("123".getBytes());
			encryptedDigest = signature.sign();
            System.out.println(Base64.encode(encryptedDigest));
            return Base64.encode(encryptedDigest);
		}
		catch(Exception e){
			e.printStackTrace();
		}
		
		return null;
	}

	public static void verify(String str) {
		File f = new File("D:/cert.cer");

		try {
			FileInputStream fs = new FileInputStream(f);
			byte[] be = new byte[fs.available()];
			fs.read(be);
			fs.close();
			Certificate x = X509Certificate.getInstance(be);
			Signature signature = Signature.getInstance("SHA1withRSA");
			signature.initVerify(x.getPublicKey());
			signature.update("123".getBytes());
			boolean b = signature
					.verify(Base64
							.decode(str));
//			boolean b = signature
//			.verify(Base64
//					.decode("r50rGj6Hrtq2MEHwrEcQQklEEdeQGokE6RJ84qLsRq/7CR+jdO2pSp4feQW3ufqmu2Cv/jR/T7hRI6qWXVTBZHu/+K2mUnYwk/iOJSQSvzo/fcwqC+HsNaIoWKoDJXIaBLorynd8vd5TeOzmY7FVcrSQG9xSkbA0RSKrRUk8UP1Cu3MuXE0R+YzDPElnwgMIVuM/t8R3WxVjgf4uzDbz/tgUcRHEgWAzD8YQqVR+cNUzjqpN06BmOO13pKqVO5CEY/xppXby7Y/qS7GKhIH7BYRIgoktUeh1TKZ8dsaWpjlyEOMP4YkMOZ1jvU6mGuCtlif92AVJX9OdJIMSBfjyEQ=="));
			System.out.println(b);
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

}