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import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import javax.crypto.Cipher;
// ¹«Ô¿¼ÓÃÜ£¬Ë½Ô¿½âÃÜʾÀý³ÌÐò
public class A {
public static void main(String[] args) throws Exception {
// ǰÌ᣺JDKÒѰ²×°ÇÒÕýÈ·ÅäÖû·¾³±äÁ¿
// Ê×ÏÈÔÚCÅ̽¨Á¢Ä¿Â¼ MyKeyStore£¬ÓÃÀ´´æ·ÅÖ¤Êé¿âÒÔ¼°µ¼³öµÄÖ¤ÊéÎļþ£¬È»ºóÔÚÃüÁîÐÐÖ´ÐÐÏÂÁÐ2¾ä
// Ͼ京Ò壺ÔÚµ±Ç°Ä¿Â¼´´½¨ TestStore ÃÜÔ¿¿â£¬¿âÃÜÂë aaaaaa £¬´´½¨Ö¤Êé TestKey2 £º·Ç¶Ô³ÆÃÜÔ¿£¬RSA Ëã·¨£¬keyÃÜÂëΪ bbbbbb £¬´æÓÚ TestStore
// C:\MyKeyStore > keytool -genkey -alias TestKey2 -dname "CN=test222" -keyalg RSA -keystore TestStore -storepass aaaaaa -keypass bbbbbb
// Ͼ京Ò壺½« TestStore ¿âÖÐµÄ TestKey2 µ¼³öΪ֤ÊéÎļþ TestKey2.cer £¬ÕâÀï¿ÉÄÜÐèÒª½« export ÐÞ¸ÄΪ exportcert
// C:\MyKeyStore > keytool -export -alias TestKey2 -file TestKey2.cer -keystore TestStore -storepass aaaaaa
// Ö¤Êé¿âÖ¤Êé±£´æÖ¤ÊéµÄ¹«Ë½Ô¿£¬µ¼³öµÄÖ¤ÊéÎļþֻЯ´ø¹«Ô¿
byte[] msg = "·¸´óººÌìÍþÕߣ¬ËäÔ¶±ØÖ".getBytes("UTF8"); // ´ý¼Ó½âÃܵÄÏûÏ¢
// ÓÃÖ¤ÊéµÄ¹«Ô¿¼ÓÃÜ
CertificateFactory cff = CertificateFactory.getInstance("X.509");
FileInputStream fis1 = new FileInputStream("C:\\MyKeyStore\\TestKey2.cer"); // Ö¤ÊéÎļþ
Certificate cf = cff.generateCertificate(fis1);
PublicKey pk1 = cf.getPublicKey(); // µÃµ½Ö¤ÊéÎļþЯ´øµÄ¹«Ô¿
Cipher c1 = Cipher.getInstance("RSA/ECB/PKCS1Padding"); // ¶¨ÒåËã·¨£ºRSA
c1.init(Cipher.ENCRYPT_MODE, pk1);
byte[] msg1 = c1.doFinal(msg); &nbs
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