JAVA 암호 화 알고리즘(DSA)

34031 단어 자바 암호 화
DSA DSA-Digital Signature Algorithm 은 Schnorr 와 ElGamal 서명 알고리즘 의 변종 으로 미국 NIST 가 DSS(Digital Signature Standard)로 사용 하고 있다.쉽게 말 하면 디지털 서명 으로 사용 되 는 더 고 급 스 러 운 검증 방식 이다.공개 키,비밀 키 뿐만 아니 라 디지털 서명 도 있 습 니 다.비밀 키 암호 화 생 성 디지털 서명,공개 키 검증 데이터 및 서명.데이터 와 서명 이 일치 하지 않 으 면 인증 이 실 패 했 습 니 다!즉,전송 중인 데 이 터 는 더 이상 암호 화 되 지 않 고 수신 자가 데 이 터 를 얻 은 후에 공개 키 와 서명 을 받 는 것 이 데이터 에 효과 가 있 는 지 여부 입 니 다! 자바 코드 를 통 해 다음 과 같이 실현 합 니 다.Coder 류 는 자바 암호 화 기술(1)을 볼 수 있 습 니 다. 자바 코드  
import java.security.Key;   
import java.security.KeyFactory;   
import java.security.KeyPair;   
import java.security.KeyPairGenerator;   
import java.security.PrivateKey;   
import java.security.PublicKey;   
import java.security.SecureRandom;   
import java.security.Signature;   
import java.security.spec.PKCS8EncodedKeySpec;   
import java.security.spec.X509EncodedKeySpec;   
import java.util.HashMap;   
import java.util.Map;   
  
  
/**  
* DSA        
*   
*/  
public abstract class DSACoder extends Coder {   
    /**  
     *     DSA      ，     RSA      ，       。  
     *   
     * <code>  
     * public static final String KEY_ALGORITHM = "RSA";  
     * public static final String SIGNATURE_ALGORITHM = "MD5withRSA";  
     * </code>  
     **/  
    public static final String KEY_ALGORITHM = "DSA";   
    public static final String SIGNATURE_ALGORITHM = "DSA";   
  
    /**  
     *       
     */  
    private static final String DEFAULT_SEED = "0f22507a10bbddd07d8a3082122966e3";   
  
    private static final String PUBLIC_KEY = "DSAPublicKey";   
    private static final String PRIVATE_KEY = "DSAPrivateKey";   
  
    /**  
     *               
     *   
     * @param data  
     *                  
     * @param privateKey  
     *                
     * @return  
     * @throws Exception  
     */  
    public static String sign(byte[] data, String privateKey) throws Exception {   
        //    base64        
        byte[] keyBytes = decryptBASE64(privateKey);   
  
        //   PKCS8EncodedKeySpec     
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);   
  
        // KEY_ALGORITHM           
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);   
  
        //          
        PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);   
  
        //                
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);   
        signature.initSign(priKey);   
        signature.update(data);   
  
        return encryptBASE64(signature.sign());   
    }   
  
    /**  
     *         
     * @param data  
     *                  
     * @param publicKey  
     *                
     * @param sign  
     *                  
     *   
     * @return       true     false  
     * @throws Exception  
     *   
     */  
    public static boolean verify(byte[] data, String publicKey, String sign)   
            throws Exception {   
  
        //    base64        
        byte[] keyBytes = decryptBASE64(publicKey);   
  
        //   X509EncodedKeySpec     
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);   
  
        // KEY_ALGORITHM           
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);   
  
        //          
        PublicKey pubKey = keyFactory.generatePublic(keySpec);   
  
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);   
        signature.initVerify(pubKey);   
        signature.update(data);   
  
        //            
        return signature.verify(decryptBASE64(sign));   
    }   
  
    /**  
     *       
     *   
     * @param seed  
     *                
     * @return       
     * @throws Exception  
     */  
    public static Map<String, Object> initKey(String seed) throws Exception {   
        KeyPairGenerator keygen = KeyPairGenerator.getInstance(KEY_ALGORITHM);   
        //            
        SecureRandom secureRandom = new SecureRandom();   
        secureRandom.setSeed(seed.getBytes());   
        keygen.initialize(1024, secureRandom);   
  
        KeyPair keys = keygen.genKeyPair();   
  
        PublicKey publicKey = keys.getPublic();   
        PrivateKey privateKey = keys.getPrivate();   
  
        Map<String, Object> map = new HashMap<String, Object>(2);   
        map.put(PUBLIC_KEY, publicKey);   
        map.put(PRIVATE_KEY, privateKey);   
  
        return map;   
    }   
  
    /**  
     *         
     *   
     * @return       
     * @throws Exception  
     */  
    public static Map<String, Object> initKey() throws Exception {   
        return initKey(DEFAULT_SEED);   
    }   
  
    /**  
     *       
     *   
     * @param keyMap  
     * @return  
     * @throws Exception  
     */  
    public static String getPrivateKey(Map<String, Object> keyMap)   
            throws Exception {   
        Key key = (Key) keyMap.get(PRIVATE_KEY);   
  
        return encryptBASE64(key.getEncoded());   
    }   
  
    /**  
     *       
     *   
     * @param keyMap  
     * @return  
     * @throws Exception  
     */  
    public static String getPublicKey(Map<String, Object> keyMap)   
            throws Exception {   
        Key key = (Key) keyMap.get(PUBLIC_KEY);   
  
        return encryptBASE64(key.getEncoded());   
    }   
}  

import java.security.Key; 
import java.security.KeyFactory; 
import java.security.KeyPair; 
import java.security.KeyPairGenerator; 
import java.security.PrivateKey; 
import java.security.PublicKey; 
import java.security.SecureRandom; 
import java.security.Signature; 
import java.security.spec.PKCS8EncodedKeySpec; 
import java.security.spec.X509EncodedKeySpec; 
import java.util.HashMap; 
import java.util.Map; 


/** 
* DSA       
* 
*/ 
public abstract class DSACoder extends Coder { 
/** 
*     DSA      ，     RSA      ，       。 
* 
* <code> 
* public static final String KEY_ALGORITHM = "RSA"; 
* public static final String SIGNATURE_ALGORITHM = "MD5withRSA"; 
* </code> 
**/ 
public static final String KEY_ALGORITHM = "DSA"; 
public static final String SIGNATURE_ALGORITHM = "DSA"; 

/** 
*      
*/ 
private static final String DEFAULT_SEED = "0f22507a10bbddd07d8a3082122966e3"; 

private static final String PUBLIC_KEY = "DSAPublicKey"; 
private static final String PRIVATE_KEY = "DSAPrivateKey"; 

/** 
*              
* 
* @param data 
*                 
* @param privateKey 
*               
* @return 
* @throws Exception 
*/ 
public static String sign(byte[] data, String privateKey) throws Exception { 
//    base64      
byte[] keyBytes = decryptBASE64(privateKey); 

//   PKCS8EncodedKeySpec   
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes); 

// KEY_ALGORITHM         
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM); 

//        
PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec); 

//              
Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM); 
signature.initSign(priKey); 
signature.update(data); 

return encryptBASE64(signature.sign()); 
} 

/** 
*        
* @param data 
*                 
* @param publicKey 
*               
* @param sign 
*                 
* 
* @return       true     false 
* @throws Exception 
* 
*/ 
public static boolean verify(byte[] data, String publicKey, String sign) 
throws Exception { 

//    base64      
byte[] keyBytes = decryptBASE64(publicKey); 

//   X509EncodedKeySpec   
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes); 

// KEY_ALGORITHM         
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM); 

//        
PublicKey pubKey = keyFactory.generatePublic(keySpec); 

Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM); 
signature.initVerify(pubKey); 
signature.update(data); 

//          
return signature.verify(decryptBASE64(sign)); 
} 

/** 
*      
* 
* @param seed 
*               
* @return      
* @throws Exception 
*/ 
public static Map<String, Object> initKey(String seed) throws Exception { 
KeyPairGenerator keygen = KeyPairGenerator.getInstance(KEY_ALGORITHM); 
//          
SecureRandom secureRandom = new SecureRandom(); 
secureRandom.setSeed(seed.getBytes()); 
keygen.initialize(1024, secureRandom); 

KeyPair keys = keygen.genKeyPair(); 

PublicKey publicKey = keys.getPublic(); 
PrivateKey privateKey = keys.getPrivate(); 

Map<String, Object> map = new HashMap<String, Object>(2); 
map.put(PUBLIC_KEY, publicKey); 
map.put(PRIVATE_KEY, privateKey); 

return map; 
} 

/** 
*        
* 
* @return      
* @throws Exception 
*/ 
public static Map<String, Object> initKey() throws Exception { 
return initKey(DEFAULT_SEED); 
} 

/** 
*      
* 
* @param keyMap 
* @return 
* @throws Exception 
*/ 
public static String getPrivateKey(Map<String, Object> keyMap) 
throws Exception { 
Key key = (Key) keyMap.get(PRIVATE_KEY); 

return encryptBASE64(key.getEncoded()); 
} 

/** 
*      
* 
* @param keyMap 
* @return 
* @throws Exception 
*/ 
public static String getPublicKey(Map<String, Object> keyMap) 
throws Exception { 
Key key = (Key) keyMap.get(PUBLIC_KEY); 

return encryptBASE64(key.getEncoded()); 
} 
} 


      DSA  ，       RSA       ，        ： 
public static final String KEY_ALGORITHM = "RSA"; 
public static final String SIGNATURE_ALGORITHM = "MD5withRSA"; 

        ： 
Java   
import static org.junit.Assert.*;   
  
import java.util.Map;   
  
import org.junit.Test;   
  
/**  
*   
*/  
public class DSACoderTest {   
  
    @Test  
    public void test() throws Exception {   
        String inputStr = "abc";   
        byte[] data = inputStr.getBytes();   
  
        //        
        Map<String, Object> keyMap = DSACoder.initKey();   
  
        //        
        String publicKey = DSACoder.getPublicKey(keyMap);   
        String privateKey = DSACoder.getPrivateKey(keyMap);   
  
        System.err.println("  :\r" + publicKey);   
        System.err.println("  :\r" + privateKey);   
  
        //        
        String sign = DSACoder.sign(data, privateKey);   
        System.err.println("  :\r" + sign);   
  
        //        
        boolean status = DSACoder.verify(data, publicKey, sign);   
        System.err.println("  :\r" + status);   
        assertTrue(status);   
  
    }   
  
}  

import static org.junit.Assert.*; 

import java.util.Map; 

import org.junit.Test; 

/** 
* 
*/ 
public class DSACoderTest { 

@Test 
public void test() throws Exception { 
String inputStr = "abc"; 
byte[] data = inputStr.getBytes(); 

//      
Map<String, Object> keyMap = DSACoder.initKey(); 

//      
String publicKey = DSACoder.getPublicKey(keyMap); 
String privateKey = DSACoder.getPrivateKey(keyMap); 

System.err.println("  :\r" + publicKey); 
System.err.println("  :\r" + privateKey); 

//      
String sign = DSACoder.sign(data, privateKey); 
System.err.println("  :\r" + sign); 

//      
boolean status = DSACoder.verify(data, publicKey, sign); 
System.err.println("  :\r" + status); 
assertTrue(status); 

}
}

콘 솔 출력: 콘 솔 코드 공개 키:   MIIBtzCCASwGByqGSM44BAEwggEfAoGBAP1/U4EddRIpUt9KnC7s5Of2EbdSPO9EAMMeP4C2USZp   RV1AIlH7WT2NWPq/xfW6MPbLm1Vs14E7gB00b/JmYLdrmVClpJ+f6AR7ECLCT7up1/63xhv4O1fn   xqimFQ8E+4P208UewwI1VBNaFpEy9nXzrith1yrv8iIDGZ3RSAHHAhUAl2BQjxUjC8yykrmCouuE   C/BYHPUCgYEA9+GghdabPd7LvKtcNrhXuXmUr7v6OuqC+VdMCz0HgmdRWVeOutRZT+ZxBxCBgLRJ   FnEj6EwoFhO3zwkyjMim4TwWeotUfI0o4KOuHiuzpnWRbqN/C/ohNWLx+2J6ASQ7zKTxvqhRkImo   g9/hWuWfBpKLZl6Ae1UlZAFMO/7PSSoDgYQAAoGAIu4RUlcQLp49PI0MrbssOY+3uySVnp0TULSv   5T4VaHoKzsLHgGTrwOvsGA+V3yCNl2WDu3D84bSLF7liTWgOj+SMOEaPk4VyRTlLXZWGPsf1Mfd9   21XAbMeVyKDSHHVGbMjBScajf3bXooYQMlyoHiOt/WrCo+mv7efstMM0PGo=     비밀 키:   MIIBTAIBADCCASwGByqGSM44BAEwggEfAoGBAP1/U4EddRIpUt9KnC7s5Of2EbdSPO9EAMMeP4C2   USZpRV1AIlH7WT2NWPq/xfW6MPbLm1Vs14E7gB00b/JmYLdrmVClpJ+f6AR7ECLCT7up1/63xhv4   O1fnxqimFQ8E+4P208UewwI1VBNaFpEy9nXzrith1yrv8iIDGZ3RSAHHAhUAl2BQjxUjC8yykrmC   ouuEC/BYHPUCgYEA9+GghdabPd7LvKtcNrhXuXmUr7v6OuqC+VdMCz0HgmdRWVeOutRZT+ZxBxCB   gLRJFnEj6EwoFhO3zwkyjMim4TwWeotUfI0o4KOuHiuzpnWRbqN/C/ohNWLx+2J6ASQ7zKTxvqhR   kImog9/hWuWfBpKLZl6Ae1UlZAFMO/7PSSoEFwIVAIegLUtmm2oQKQJTOiLugHTSjl/q     서명:   MC0CFQCMg0J/uZmF8GuRpr3TNq48w60nDwIUJCyYNah+HtbU6NcQfy8Ac6LeLQs=     상태:   true  공개 키: MIIBtzCCASwGByqGSM44BAEwggEfAoGBAP1/U4EddRIpUt9KnC7s5Of2EbdSPO9EAMMeP4C2USZp RV1AIlH7WT2NWPq/xfW6MPbLm1Vs14E7gB00b/JmYLdrmVClpJ+f6AR7ECLCT7up1/63xhv4O1fn xqimFQ8E+4P208UewwI1VBNaFpEy9nXzrith1yrv8iIDGZ3RSAHHAhUAl2BQjxUjC8yykrmCouuE C/BYHPUCgYEA9+GghdabPd7LvKtcNrhXuXmUr7v6OuqC+VdMCz0HgmdRWVeOutRZT+ZxBxCBgLRJ FnEj6EwoFhO3zwkyjMim4TwWeotUfI0o4KOuHiuzpnWRbqN/C/ohNWLx+2J6ASQ7zKTxvqhRkImo g9/hWuWfBpKLZl6Ae1UlZAFMO/7PSSoDgYQAAoGAIu4RUlcQLp49PI0MrbssOY+3uySVnp0TULSv 5T4VaHoKzsLHgGTrwOvsGA+V3yCNl2WDu3D84bSLF7liTWgOj+SMOEaPk4VyRTlLXZWGPsf1Mfd9 21XAbMeVyKDSHHVGbMjBScajf3bXooYQMlyoHiOt/WrCo+mv7efstMM0PGo= 비밀 키: MIIBTAIBADCCASwGByqGSM44BAEwggEfAoGBAP1/U4EddRIpUt9KnC7s5Of2EbdSPO9EAMMeP4C2 USZpRV1AIlH7WT2NWPq/xfW6MPbLm1Vs14E7gB00b/JmYLdrmVClpJ+f6AR7ECLCT7up1/63xhv4 O1fnxqimFQ8E+4P208UewwI1VBNaFpEy9nXzrith1yrv8iIDGZ3RSAHHAhUAl2BQjxUjC8yykrmC ouuEC/BYHPUCgYEA9+GghdabPd7LvKtcNrhXuXmUr7v6OuqC+VdMCz0HgmdRWVeOutRZT+ZxBxCB gLRJFnEj6EwoFhO3zwkyjMim4TwWeotUfI0o4KOuHiuzpnWRbqN/C/ohNWLx+2J6ASQ7zKTxvqhR kImog9/hWuWfBpKLZl6Ae1UlZAFMO/7PSSoEFwIVAIegLUtmm2oQKQJTOiLugHTSjl/q 서명: MC0CFQCMg0J/uZmF8GuRpr3TNq48w60nDwIUJCyYNah+HtbU6NcQfy8Ac6LeLQs= 상태: true
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Python 은 pymssql 을 이용 하여 my sql 데이터 베 이 스 를 방문 합 니 다.

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