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RSA解密时BadPaddingException解决方法(2)

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again: " + encrypt.bytesToString(clone));
byte[] d = encrypt.decrypt(privateKey, clone);
System.out.println("decrypted String's bytes, use
bytesToString() method convert bytes to string:"
+ encrypt.bytesToString(d));
System.out.println("construct a string by decrypted
string's bytes: " + new String(d));
} catch (Exception e) {
e.printStackTrace();
}
}

protected String bytesToString(byte[] encrytpByte) {
String result = "";
for (Byte bytes : encrytpByte) {
result += bytes.toString() + " ";
}
return result;
}

protected byte[] encrypt(RSAPublicKey publicKey, byte[] obj) {
if (publicKey != null) {
try {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
return cipher.doFinal(obj);
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}

protected byte[] decrypt(RSAPrivateKey privateKey, byte[] obj) {
if (privateKey != null) {
try {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, privateKey);
return cipher.doFinal(obj);
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
}

运行结果:
String will be encrypted: Hello World!
encrypted String's bytes, use bytesToString() method convert bytes to
string: 79 62 -105 -47 -61 45 64 -11 -8 -120 30 31 37 -111 49 -30 88
-12 93 -77 3 39 -13 -18 68 -104 0 30 85 26 104 15 -126 -39 12 110 -84
68 -43 73 35 121 -20 -69 -84 85 -33 -123 -48 -68 -85 -106 41 -84 20
-17 87 -81 42 -67 -87 122 -2 37 74 27 103 112 58 -125 -87 -32 96 -56
65 -2 -103 -28 70 107 2 28 87 75 -8 -62 54 12 -7 -108 -123 120 -63 -83
13 -89 -21 58 -51 -84 66 25 103 -114 -14 110 80 58 74 95 -57 -73 -78
-46 56 -83 -72 -38 2 43 25 12 56 12 101 15 91 -37
convert to String, then back to bytes again: 79 62 -105 -47 -61 45 64
-11 -8 -120 30 31 37 -111 49 -30 88 -12 93 -77 3 39 -13 -18 68 -104 0
30 85 26 104 15 -126 -39 12 110 -84 68 -43 73 35 121 -20 -69 -84 85
-33 -123 -48 -68 -85 -106 41 -84 20 -17 87 -81 42 -67 -87 122 -2 37 74
27 103 112 58 -125 -87 -32 96 -56 65 -2 -103 -28 70 107 2 28 87 75 -8
-62 54 12 -7 -108 -123 120 -63 -83 13 -89 -21 58 -51 -84 66 25 103
-114 -14 110 80 58 74 95 -57 -73 -78 -46 56 -83 -72 -38 2 43 25 12 56
12 101 15 91 -37
decrypted String's bytes, use bytesToString() method convert bytes to
string:72 101 108 108 111 32 87 111 114 108 100 33
construct a string by decrypted string's bytes: Hello World!

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