Exception in thread "main" javax.crypto.BadPaddingException: Decryption error
    at sun.security.rsa.RSAPadding.unpadV15(RSAPadding.java:380)
    at sun.security.rsa.RSAPadding.unpad(RSAPadding.java:291)
    at com.sun.crypto.provider.RSACipher.doFinal(RSACipher.java:356)
    at com.sun.crypto.provider.RSACipher.engineDoFinal(RSACipher.java:389)
    at javax.crypto.Cipher.doFinal(Cipher.java:2223)
    at com.asymmetric.rsa.TestRSA.testDecrypt(TestRSA.java:115)

at com.asymmetric.rsa.TestRSA.main(TestRSA.java:34)

简单解释:

字面意思就是解密的时候填充错误,rsa 加解密都是把数据必须满足一定的长度,如果  不满足就要进行填充(一般是补0)直到满足特定的长度

测试代码



  1. 

    

    

    

    package com.asymmetric.rsa;
    

    2. 

  2. 

    

    

    

     
    

    3. 

  3. 

    

    

    

    import java.io.ByteArrayOutputStream;
    

    4. 

  4. 

    

    

    

    import java.io.IOException;
    

    5. 

  5. 

    

    

    

    import java.security.InvalidKeyException;
    

    6. 

  6. 

    

    

    

    import java.security.KeyFactory;
    

    7. 

  7. 

    

    

    

    import java.security.NoSuchAlgorithmException;
    

    8. 

  8. 

    

    

    

    import java.security.PrivateKey;
    

    9. 

  9. 

    

    

    

    import java.security.PublicKey;
    

    10. 

  10. 

    

    

    

    import java.security.spec.InvalidKeySpecException;
    

    11. 

  11. 

    

    

    

    import java.security.spec.PKCS8EncodedKeySpec;
    

    12. 

  12. 

    

    

    

    import java.security.spec.X509EncodedKeySpec;
    

    13. 

  13. 

    

    

    

    import java.util.Base64;
    

    14. 

  14. 

    

    

    

     
    

    15. 

  15. 

    

    

    

    import javax.crypto.BadPaddingException;
    

    16. 

  16. 

    

    

    

    import javax.crypto.Cipher;
    

    17. 

  17. 

    

    

    

    import javax.crypto.IllegalBlockSizeException;
    

    18. 

  18. 

    

    

    

    import javax.crypto.NoSuchPaddingException;
    

    19. 

  19. 

    

    

    

     
    

    20. 

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    21. 

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    22. 

  22. 

    

    

    

    public class TestRSA {
    

    23. 

  23. 

    

    

    

    	
    

    24. 

  24. 

    

    

    

    	public static String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDQgEoj3z9JrdPNI23DbMQkl3gkGuDke7iBr5yrYyqolkTyxuBLWFwHNuGv4VKOj9fXg61QxpaJ/fxDBvMvmkBSRowHBloGFceVTx8wV/8u0DcjvTCu0IZ1zp6wjG6xBn5j66Sg/q+9hvaY2p7fkKmsvcW6VoNPgQHU1Cf01DLZmQIDAQAB+oXcINOiE3AsuZ4VJmwNZg9Y/7fY+OFRS2JAh5YMsrv2qyoGP+Z9ksre26NYR+Lt91B2lhdwJHLpQpziaANZm/ONb31fj/lwIDAQAB";
    

    25. 

  25. 

    

    

    

    	public static String privateKey = "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";
    

    26. 

  26. 

    

    

    

    	
    

    27. 

  27. 

    

    

    

    	private static String algorithm = "RSA"; //$NON-NLS-1$
    

    28. 

  28. 

    

    

    

    	private static final int MAX_ENCRYPT_BLOCK = 117;
    

    29. 

  29. 

    

    

    

    	private static final int MAX_DECRYPT_BLOCK = 128;
    

    30. 

  30. 

    

    

    

    	private static String data = "test jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihg"; //$NON-NLS-1$
    

    31. 

  31. 

    

    

    

    	
    

    32. 

  32. 

    

    

    

    	public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException {
    

    33. 

  33. 

    

    

    

    		String test = testEncrypt(privateKey,data);
    

    34. 

  34. 

    

    

    

    		String testDecrypt = testDecrypt(publicKey, test);
    

    35. 

  35. 

    

    

    

    		System.out.println(testDecrypt);
    

    36. 

  36. 

    

    

    

    		
    

    37. 

  37. 

    

    

    

    	}
    

    38. 

  38. 

    

    

    

    	
    

    39. 

  39. 

    

    

    

     
    

    40. 

  40. 

    

    

    

    	/**
    

    41. 

  41. 

    

    

    

    	 * 加密
    

    42. 

  42. 

    

    

    

    	 * @param key
    

    43. 

  43. 

    

    

    

    	 * @param data
    

    44. 

  44. 

    

    

    

    	 * @return
    

    45. 

  45. 

    

    

    

    	 * @throws NoSuchAlgorithmException
    

    46. 

  46. 

    

    

    

    	 * @throws InvalidKeySpecException
    

    47. 

  47. 

    

    

    

    	 * @throws NoSuchPaddingException
    

    48. 

  48. 

    

    

    

    	 * @throws IllegalBlockSizeException
    

    49. 

  49. 

    

    

    

    	 * @throws BadPaddingException
    

    50. 

  50. 

    

    

    

    	 * @throws InvalidKeyException
    

    51. 

  51. 

    

    

    

    	 * @throws IOException 
    

    52. 

  52. 

    

    

    

    	 */
    

    53. 

  53. 

    

    

    

    	public static String testEncrypt(String key,String data) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException{
    

    54. 

  54. 

    

    

    

    		byte[] decode = Base64.getDecoder().decode(key);
    

    55. 

  55. 

    

    

    

    		PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(decode);
    

    56. 

  56. 

    

    

    

    		KeyFactory kf = KeyFactory.getInstance(algorithm);
    

    57. 

  57. 

    

    

    

    		PrivateKey generatePrivate = kf.generatePrivate(pkcs8EncodedKeySpec);
    

    58. 

  58. 

    

    

    

    		Cipher ci = Cipher.getInstance(algorithm);
    

    59. 

  59. 

    

    

    

    		ci.init(Cipher.ENCRYPT_MODE, generatePrivate);
    

    60. 

  60. 

    

    

    

    		
    

    61. 

  61. 

    

    

    

    		byte[] bytes = data.getBytes();
    

    62. 

  62. 

    

    

    

    		int inputLen = bytes.length;
    

    63. 

  63. 

    

    

    

    		int offLen = 0;//偏移量
    

    64. 

  64. 

    

    

    

    		int i = 0;
    

    65. 

  65. 

    

    

    

    		ByteArrayOutputStream bops = new ByteArrayOutputStream();
    

    66. 

  66. 

    

    

    

    		while(inputLen - offLen > 0){
    

    67. 

  67. 

    

    

    

    			byte [] cache;
    

    68. 

  68. 

    

    

    

    			if(inputLen - offLen > 117){
    

    69. 

  69. 

    

    

    

    				cache = ci.doFinal(bytes, offLen,117);
    

    70. 

  70. 

    

    

    

    			}else{
    

    71. 

  71. 

    

    

    

    				cache = ci.doFinal(bytes, offLen,inputLen - offLen);
    

    72. 

  72. 

    

    

    

    			}
    

    73. 

  73. 

    

    

    

    			bops.write(cache);
    

    74. 

  74. 

    

    

    

    			i++;
    

    75. 

  75. 

    

    

    

    			offLen = 117 * i;
    

    76. 

  76. 

    

    

    

    		}
    

    77. 

  77. 

    

    

    

    		bops.close();
    

    78. 

  78. 

    

    

    

    		byte[] encryptedData = bops.toByteArray();
    

    79. 

  79. 

    

    

    

    		String encodeToString = Base64.getEncoder().encodeToString(encryptedData);
    

    80. 

  80. 

    

    

    

    		return encodeToString;
    

    81. 

  81. 

    

    

    

    	}
    

    82. 

  82. 

    

    

    

    	
    

    83. 

  83. 

    

    

    

     
    

    84. 

  84. 

    

    

    

     
    

    85. 

  85. 

    

    

    

    	
    

    86. 

  86. 

    

    

    

    	/**
    

    87. 

  87. 

    

    

    

    	 * 解密
    

    88. 

  88. 

    

    

    

    	 * @param key
    

    89. 

  89. 

    

    

    

    	 * @param data
    

    90. 

  90. 

    

    

    

    	 * @return
    

    91. 

  91. 

    

    

    

    	 * @throws NoSuchAlgorithmException
    

    92. 

  92. 

    

    

    

    	 * @throws InvalidKeyException 
    

    93. 

  93. 

    

    

    

    	 * @throws NoSuchPaddingException 
    

    94. 

  94. 

    

    

    

    	 * @throws InvalidKeySpecException 
    

    95. 

  95. 

    

    

    

    	 * @throws BadPaddingException 
    

    96. 

  96. 

    

    

    

    	 * @throws IllegalBlockSizeException 
    

    97. 

  97. 

    

    

    

    	 * @throws IOException 
    

    98. 

  98. 

    

    

    

    	 */
    

    99. 

  99. 

    

    

    

    	public static String testDecrypt(String key,String data) throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, InvalidKeySpecException, IllegalBlockSizeException, BadPaddingException, IOException{
    

    100. 

  100. 

    

    

    

    		byte[] decode = Base64.getDecoder().decode(key);
    

    101. 

  101. 

    

    

    

    //		PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(decode); //java底层 RSA公钥只支持X509EncodedKeySpec这种格式
    

    102. 

  102. 

    

    

    

    		X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(decode);
    

    103. 

  103. 

    

    

    

    		KeyFactory kf = KeyFactory.getInstance(algorithm);
    

    104. 

  104. 

    

    

    

    		PublicKey generatePublic = kf.generatePublic(x509EncodedKeySpec);
    

    105. 

  105. 

    

    

    

    		Cipher ci = Cipher.getInstance(algorithm);
    

    106. 

  106. 

    

    

    

    		ci.init(Cipher.DECRYPT_MODE,generatePublic);
    

    107. 

  107. 

    

    

    

    		
    

    108. 

  108. 

    

    

    

    		int inputLen = data.getBytes().length;
    

    109. 

  109. 

    

    

    

    		byte[] bytes = data.getBytes();
    

    110. 

  110. 

    

    

    

    		int offLen = 0;
    

    111. 

  111. 

    

    

    

    		int i = 0;
    

    112. 

  112. 

    

    

    

    		ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    

    113. 

  113. 

    

    

    

    		while(inputLen - offLen > 0){
    

    114. 

  114. 

    

    

    

    			byte[] cache;
    

    115. 

  115. 

    

    

    

    			if(inputLen - offLen > 128){
    

    116. 

  116. 

    

    

    

    				cache = ci.doFinal(bytes,offLen,128); 
    

    117. 

  117. 

    

    

    

    			}else{
    

    118. 

  118. 

    

    

    

    				cache = ci.doFinal(bytes,offLen,inputLen - offLen);
    

    119. 

  119. 

    

    

    

    			}
    

    120. 

  120. 

    

    

    

    			byteArrayOutputStream.write(cache);
    

    121. 

  121. 

    

    

    

    			i++;
    

    122. 

  122. 

    

    

    

    			offLen = 128 * i;
    

    123. 

  123. 

    

    

    

    			
    

    124. 

  124. 

    

    

    

    		}
    

    125. 

  125. 

    

    

    

    		byteArrayOutputStream.close();
    

    126. 

  126. 

    

    

    

    		byte[] byteArray = byteArrayOutputStream.toByteArray();
    

    127. 

  127. 

    

    

    

    		return new String(byteArray);
    

    128. 

  128. 

    

    

    

    	}
    

    129. 

  129. 

    

    

    

    	
    

    130. 

  130. 

    

    

    

    	
    

    131. 

  131. 

    

    

    

    	
    

    132. 

  132. 

    

    

    

    }

问题点:

后来发现确实是我自己的错误,rsa 加密后返回的字符串使用Base64编码的,忘了解密直接getBytes()就出错了

api 指出:BadPaddingException - 如果此 Cipher 为解密模式，并且未请求填充（或不填充），但解密的数据没有用适当的填充字节进行限制

只要是cipher.doFinal()解密时报 BadPaddingException 肯定是传入的字节数组有问题,传的不是加密时生成的数组

修正后的代码:



  1. 

    

    

    

    package com.asymmetric.rsa;
    

    2. 

  2. 

    

    

    

     
    

    3. 

  3. 

    

    

    

    import java.io.ByteArrayOutputStream;
    

    4. 

  4. 

    

    

    

    import java.io.IOException;
    

    5. 

  5. 

    

    

    

    import java.security.InvalidKeyException;
    

    6. 

  6. 

    

    

    

    import java.security.KeyFactory;
    

    7. 

  7. 

    

    

    

    import java.security.NoSuchAlgorithmException;
    

    8. 

  8. 

    

    

    

    import java.security.PrivateKey;
    

    9. 

  9. 

    

    

    

    import java.security.PublicKey;
    

    10. 

  10. 

    

    

    

    import java.security.spec.InvalidKeySpecException;
    

    11. 

  11. 

    

    

    

    import java.security.spec.PKCS8EncodedKeySpec;
    

    12. 

  12. 

    

    

    

    import java.security.spec.X509EncodedKeySpec;
    

    13. 

  13. 

    

    

    

    import java.util.Base64;
    

    14. 

  14. 

    

    

    

     
    

    15. 

  15. 

    

    

    

    import javax.crypto.BadPaddingException;
    

    16. 

  16. 

    

    

    

    import javax.crypto.Cipher;
    

    17. 

  17. 

    

    

    

    import javax.crypto.IllegalBlockSizeException;
    

    18. 

  18. 

    

    

    

    import javax.crypto.NoSuchPaddingException;
    

    19. 

  19. 

    

    

    

     
    

    20. 

  20. 

    

    

    

     
    

    21. 

  21. 

    

    

    

     
    

    22. 

  22. 

    

    

    

    public class TestRSA {
    

    23. 

  23. 

    

    

    

    	
    

    24. 

  24. 

    

    

    

    	public static String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDQgEoj3z9JrdPNI23DbMQkl3gkGuDke7iBr5yrYyqolkTyxuBLWFwHNuGv4VKOj9fXg61QxpaJ/fxDBvMvmkBSRowHBloGFceVTx8wV/8u0DcjvTCu0IZ1zp6wjG6xBn5j66Sg/q+9hvaY2p7fkKmsvcW6VoNPgQHU1Cf01DLZmQIDAQAB+oXcINOiE3AsuZ4VJmwNZg9Y/7fY+OFRS2JAh5YMsrv2qyoGP+Z9ksre26NYR+Lt91B2lhdwJHLpQpziaANZm/ONb31fj/lwIDAQAB";
    

    25. 

  25. 

    

    

    

    	public static String privateKey = "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";
    

    26. 

  26. 

    

    

    

    	
    

    27. 

  27. 

    

    

    

    	private static String algorithm = "RSA"; //$NON-NLS-1$
    

    28. 

  28. 

    

    

    

    	private static final int MAX_ENCRYPT_BLOCK = 117;
    

    29. 

  29. 

    

    

    

    	private static final int MAX_DECRYPT_BLOCK = 128;
    

    30. 

  30. 

    

    

    

    	private static String data = "test jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihgtest jiojiogeiojigouihg"; //$NON-NLS-1$
    

    31. 

  31. 

    

    

    

    	
    

    32. 

  32. 

    

    

    

    	public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException {
    

    33. 

  33. 

    

    

    

    		String test = testEncrypt(privateKey,data);
    

    34. 

  34. 

    

    

    

    		String testDecrypt = testDecrypt(publicKey, test);
    

    35. 

  35. 

    

    

    

    		System.out.println(testDecrypt);
    

    36. 

  36. 

    

    

    

    		
    

    37. 

  37. 

    

    

    

    	}
    

    38. 

  38. 

    

    

    

    	
    

    39. 

  39. 

    

    

    

     
    

    40. 

  40. 

    

    

    

    	/**
    

    41. 

  41. 

    

    

    

    	 * 加密
    

    42. 

  42. 

    

    

    

    	 * @param key
    

    43. 

  43. 

    

    

    

    	 * @param data
    

    44. 

  44. 

    

    

    

    	 * @return
    

    45. 

  45. 

    

    

    

    	 * @throws NoSuchAlgorithmException
    

    46. 

  46. 

    

    

    

    	 * @throws InvalidKeySpecException
    

    47. 

  47. 

    

    

    

    	 * @throws NoSuchPaddingException
    

    48. 

  48. 

    

    

    

    	 * @throws IllegalBlockSizeException
    

    49. 

  49. 

    

    

    

    	 * @throws BadPaddingException
    

    50. 

  50. 

    

    

    

    	 * @throws InvalidKeyException
    

    51. 

  51. 

    

    

    

    	 * @throws IOException 
    

    52. 

  52. 

    

    

    

    	 */
    

    53. 

  53. 

    

    

    

    	public static String testEncrypt(String key,String data) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException{
    

    54. 

  54. 

    

    

    

    		byte[] decode = Base64.getDecoder().decode(key);
    

    55. 

  55. 

    

    

    

    		PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(decode);
    

    56. 

  56. 

    

    

    

    		KeyFactory kf = KeyFactory.getInstance(algorithm);
    

    57. 

  57. 

    

    

    

    		PrivateKey generatePrivate = kf.generatePrivate(pkcs8EncodedKeySpec);
    

    58. 

  58. 

    

    

    

    		Cipher ci = Cipher.getInstance(algorithm);
    

    59. 

  59. 

    

    

    

    		ci.init(Cipher.ENCRYPT_MODE, generatePrivate);
    

    60. 

  60. 

    

    

    

    		
    

    61. 

  61. 

    

    

    

    		byte[] bytes = data.getBytes();
    

    62. 

  62. 

    

    

    

    		int inputLen = bytes.length;
    

    63. 

  63. 

    

    

    

    		int offLen = 0;//偏移量
    

    64. 

  64. 

    

    

    

    		int i = 0;
    

    65. 

  65. 

    

    

    

    		ByteArrayOutputStream bops = new ByteArrayOutputStream();
    

    66. 

  66. 

    

    

    

    		while(inputLen - offLen > 0){
    

    67. 

  67. 

    

    

    

    			byte [] cache;
    

    68. 

  68. 

    

    

    

    			if(inputLen - offLen > 117){
    

    69. 

  69. 

    

    

    

    				cache = ci.doFinal(bytes, offLen,117);
    

    70. 

  70. 

    

    

    

    			}else{
    

    71. 

  71. 

    

    

    

    				cache = ci.doFinal(bytes, offLen,inputLen - offLen);
    

    72. 

  72. 

    

    

    

    			}
    

    73. 

  73. 

    

    

    

    			bops.write(cache);
    

    74. 

  74. 

    

    

    

    			i++;
    

    75. 

  75. 

    

    

    

    			offLen = 117 * i;
    

    76. 

  76. 

    

    

    

    		}
    

    77. 

  77. 

    

    

    

    		bops.close();
    

    78. 

  78. 

    

    

    

    		byte[] encryptedData = bops.toByteArray();
    

    79. 

  79. 

    

    

    

    		String encodeToString = Base64.getEncoder().encodeToString(encryptedData);
    

    80. 

  80. 

    

    

    

    		return encodeToString;
    

    81. 

  81. 

    

    

    

    	}
    

    82. 

  82. 

    

    

    

    	
    

    83. 

  83. 

    

    

    

     
    

    84. 

  84. 

    

    

    

     
    

    85. 

  85. 

    

    

    

    	
    

    86. 

  86. 

    

    

    

    	/**
    

    87. 

  87. 

    

    

    

    	 * 解密
    

    88. 

  88. 

    

    

    

    	 * @param key
    

    89. 

  89. 

    

    

    

    	 * @param data
    

    90. 

  90. 

    

    

    

    	 * @return
    

    91. 

  91. 

    

    

    

    	 * @throws NoSuchAlgorithmException
    

    92. 

  92. 

    

    

    

    	 * @throws InvalidKeyException 
    

    93. 

  93. 

    

    

    

    	 * @throws NoSuchPaddingException 
    

    94. 

  94. 

    

    

    

    	 * @throws InvalidKeySpecException 
    

    95. 

  95. 

    

    

    

    	 * @throws BadPaddingException 
    

    96. 

  96. 

    

    

    

    	 * @throws IllegalBlockSizeException 
    

    97. 

  97. 

    

    

    

    	 * @throws IOException 
    

    98. 

  98. 

    

    

    

    	 */
    

    99. 

  99. 

    

    

    

    	public static String testDecrypt(String key,String data) throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, InvalidKeySpecException, IllegalBlockSizeException, BadPaddingException, IOException{
    

    100. 

  100. 

    

    

    

    		byte[] decode = Base64.getDecoder().decode(key);
    

    101. 

  101. 

    

    

    

    //		PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(decode); //java底层 RSA公钥只支持X509EncodedKeySpec这种格式
    

    102. 

  102. 

    

    

    

    		X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(decode);
    

    103. 

  103. 

    

    

    

    		KeyFactory kf = KeyFactory.getInstance(algorithm);
    

    104. 

  104. 

    

    

    

    		PublicKey generatePublic = kf.generatePublic(x509EncodedKeySpec);
    

    105. 

  105. 

    

    

    

    		Cipher ci = Cipher.getInstance(algorithm);
    

    106. 

  106. 

    

    

    

    		ci.init(Cipher.DECRYPT_MODE,generatePublic);
    

    107. 

  107. 

    

    

    

    		
    

    108. 

  108. 

    

    

    

    		byte[] bytes = Base64.getDecoder().decode(data);
    

    109. 

  109. 

    

    

    

    		int inputLen = bytes.length;
    

    110. 

  110. 

    

    

    

    		int offLen = 0;
    

    111. 

  111. 

    

    

    

    		int i = 0;
    

    112. 

  112. 

    

    

    

    		ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    

    113. 

  113. 

    

    

    

    		while(inputLen - offLen > 0){
    

    114. 

  114. 

    

    

    

    			byte[] cache;
    

    115. 

  115. 

    

    

    

    			if(inputLen - offLen > 128){
    

    116. 

  116. 

    

    

    

    				cache = ci.doFinal(bytes,offLen,128); 
    

    117. 

  117. 

    

    

    

    			}else{
    

    118. 

  118. 

    

    

    

    				cache = ci.doFinal(bytes,offLen,inputLen - offLen);
    

    119. 

  119. 

    

    

    

    			}
    

    120. 

  120. 

    

    

    

    			byteArrayOutputStream.write(cache);
    

    121. 

  121. 

    

    

    

    			i++;
    

    122. 

  122. 

    

    

    

    			offLen = 128 * i;
    

    123. 

  123. 

    

    

    

    			
    

    124. 

  124. 

    

    

    

    		}
    

    125. 

  125. 

    

    

    

    		byteArrayOutputStream.close();
    

    126. 

  126. 

    

    

    

    		byte[] byteArray = byteArrayOutputStream.toByteArray();
    

    127. 

  127. 

    

    

    

    		return new String(byteArray);
    

    128. 

  128. 

    

    

    

    	}
    

    129. 

  129. 

    

    

    

    	
    

    130. 

  130. 

    

    

    

    	
    

    131. 

  131. 

    

    

    

    	
    

    132. 

  132. 

    

    

    

    }

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