RSA 공개 키를 사용하는 Android 암호화 문자열

Question

RSA 공개 키를 사용하여 비밀번호를 암호화해야하는 프로젝트에서 일하고 있습니다. 나는 RSA using SpongyCastle

Android RSA encryption from public string

을 다음과 같이 SO에서 많은 샘플 및 솔루션을 시도하지만 해결책으로는 불행하게도 내 경우에는 작동하지 않습니다. 내가

오류 로그 주위의 모든 작업과 함께하려고하면 나는 반복적으로 다음과 같은 예외를 얻고 있었다 :

04-21 07:50:57.876 18842-18842/com.takeoffandroid.passwordencryption W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable 
04-21 07:50:57.986 18842-18842/com.takeoffandroid.passwordencryption W/System.err: java.security.spec.InvalidKeySpecException: java.lang.RuntimeException: error:0c0890ba:ASN.1 encoding routines:asn1_check_tlen:WRONG_TAG 
04-21 07:50:57.986 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.android.org.conscrypt.OpenSSLKey.getPublicKey(OpenSSLKey.java:250) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.android.org.conscrypt.OpenSSLRSAKeyFactory.engineGeneratePublic(OpenSSLRSAKeyFactory.java:47) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at java.security.KeyFactory.generatePublic(KeyFactory.java:172) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.takeoffandroid.passwordencryption.MainActivity.RSAEncrypt(MainActivity.java:181) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.takeoffandroid.passwordencryption.MainActivity.onCreate(MainActivity.java:80) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.app.Activity.performCreate(Activity.java:6532) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2383) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.app.ActivityThread.access$900(ActivityThread.java:157) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1351) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.os.Handler.dispatchMessage(Handler.java:102) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.os.Looper.loop(Looper.java:148) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at android.app.ActivityThread.main(ActivityThread.java:5437) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at java.lang.reflect.Method.invoke(Native Method) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err: Caused by: java.lang.RuntimeException: error:0c0890ba:ASN.1 encoding routines:asn1_check_tlen:WRONG_TAG 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.android.org.conscrypt.NativeCrypto.d2i_PUBKEY(Native Method) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err:  at com.android.org.conscrypt.OpenSSLKey.getPublicKey(OpenSSLKey.java:248) 
04-21 07:50:57.987 18842-18842/com.takeoffandroid.passwordencryption W/System.err: ... 16 more 

내 요구 사항 :

나는 나와 함께 공개 키를 가지고 있고 암호화 싶어 그 공개 키로 edittext에 입력 된 텍스트. 예 : 암호 @ 123은 공개 키를 사용하여 암호화해야합니다.

공개 키 :

public static String PUBLIC_KEY = "-----BEGIN RSA PUBLIC KEY-----\n" + 
      "MMDDFDFK43545mmdf499Mdfdasl43ND/GGKLGKL4434safddEcBFfbTZUM517\n" + 
      "VDSVFS45fwdGJGGLKGGL332XSA3=d/S/2ETegJPFQ4sjiY7/DsS2o9Gr\n" + 
      "asBASF3465243FCDXSDCDxsSFC39NkDiNO2QKNXivAQVpuJeuoDeK\n" + 
      "wNGmwDkIsvxBn8u55QpOwvdaRBeLqllJ6xoF6OuwnD0IB4tVDL2MbMVj1U9GtEGL\n" + 
      "DJKHSJAH434jjhdds54KkhjbvGJGGGG/Vn4OYNooIWE9uuiyxm2M\n" + 
      "AFSDAFXZB546FGHxcvv324FDGJIYTaa346/9xQIDAQAB\n" + 
      "-----END RSA PUBLIC KEY-----"; 

코드 구현 나는 시도 :

샘플 I :

public static String encryptDataRSA(final String data) throws IOException { 
     final byte[] dataToEncrypt = data.getBytes(); 
     byte[] encryptedData = null; 

     try { 

      PublicKey publicKey = KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(RSAUtils.PUBLIC_KEY.getBytes())); 

      final Cipher cipher = Cipher.getInstance("RSA"); 
      cipher.init(Cipher.ENCRYPT_MODE, publicKey); 
      encryptedData = cipher.doFinal(dataToEncrypt); 

      try { 
       final String encryptedText = new String(Base64.encode(encryptedData, Base64.DEFAULT), "UTF-8"); 
       return encryptedText.toString(); 
      } 
      catch (final UnsupportedEncodingException e1) { return null; } 
     } catch (Exception e) { e.printStackTrace(); } 

     return "ERROR"; 
    } 

샘플 II :

를

public byte[] RSAEncrypt(final String plain) throws NoSuchAlgorithmException, NoSuchPaddingException, 
      InvalidKeyException, IllegalBlockSizeException, BadPaddingException, InvalidKeySpecException { 
     KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA"); 
     kpg.initialize(1024); 
     KeyPair kp = kpg.genKeyPair(); 
     PublicKey publicKey = KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(RSAUtils.PUBLIC_KEY.getBytes())); 

     Cipher cipher = Cipher.getInstance("RSA"); 
     cipher.init(Cipher.ENCRYPT_MODE, publicKey); 
     byte[] encryptedBytes = cipher.doFinal(plain.getBytes()); 
     System.out.println("EEncrypted?????" + org.apache.commons.codec.binary.Hex.encodeHexString(encryptedBytes)); 
     return encryptedBytes; 
    } 

샘플 III :

public static String encryptRSAToString(String text, String strPublicKey) { 
     byte[] cipherText = null; 
     String strEncryInfoData=""; 
     try { 

      KeyFactory keyFac = KeyFactory.getInstance("RSA"); 
      KeySpec keySpec = new X509EncodedKeySpec(Base64.decode(strPublicKey.trim().getBytes(), Base64.DEFAULT)); 
      Key publicKey = keyFac.generatePublic(keySpec); 

      // get an RSA cipher object and print the provider 
      final Cipher cipher = Cipher.getInstance("RSA"); 
      // encrypt the plain text using the public key 
      cipher.init(Cipher.ENCRYPT_MODE, publicKey); 
      cipherText = cipher.doFinal(text.getBytes()); 
      strEncryInfoData = new String(Base64.encode(cipherText,Base64.DEFAULT)); 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
     return strEncryInfoData.replaceAll("(\\r|\\n)", ""); 
    } 

어떤 도움이나 제안이 나에게 정말 도움이 될 것입니다. 미리 감사드립니다.

Answer 1

시도해보십시오.

public static String PUBLIC_KEY = "YOUR PUBLIC KEY"; 

static String enccriptData(String txt) 
{ 
    String encoded = ""; 
    byte[] encrypted = null; 
    try { 
     byte[] publicBytes = Base64.decode(PUBLIC_KEY, Base64.DEFAULT); 
     X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicBytes); 
     KeyFactory keyFactory = KeyFactory.getInstance("RSA"); 
     PublicKey pubKey = keyFactory.generatePublic(keySpec); 
     Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1PADDING"); //or try with "RSA" 
     cipher.init(Cipher.ENCRYPT_MODE, pubKey); 
     encrypted = cipher.doFinal(txt.getBytes()); 
     encoded = Base64.encodeToString(encrypted, Base64.DEFAULT); 
    } 
    catch (Exception e) { 
     e.printStackTrace(); 
    } 
    return encoded; 
} 

편집 :

당신은 내 코드를 사용하지만 제임스 K. 포크의 코멘트를 읽을 수있는, 그가 공개 키 명확하게 손상