badpaddingexception

Decryption Error bad padding

由 我的梦境 提交于 2019-12-13 05:43:42
问题 I am trying to send encrypted messages between two agents .I have a string that contains information that I convert to bytes encrypt it and then to string again to send the message. Messages are received however, at the receiving agent I get the following exception javax.crypto.BadPaddingException: Decryption error at sun.security.rsa.RSAPadding.unpadV15(Unknown Source) at sun.security.rsa.RSAPadding.unpad(Unknown Source) at com.sun.crypto.provider.RSACipher.doFinal(RSACipher.java:354) at com

Java AES decryption BadPaddingException

由 心已入冬 提交于 2019-12-12 08:16:49
问题 note: Java NOOB. Alright, I know this has been answered a few dozen times on here, but the solutions don't seem to work/apply directly to where I understand them. (Yes, I know I don't completely understand encryption/decryption, AES, etc. but that is not the point, I am trying to understand this) I have a utility api where I want to pass a string and return an encrypted string. Then I want to pass the encrypted string, and return a decrypted string. Simple. It works fine for many strings I

Android AES decryption and data from iOS:javax.crypto.BadPaddingException: pad block corrupted

由 江枫思渺然 提交于 2019-12-09 07:18:23
问题 I tried to decrypt a backup on Android which is sent from iOS , and the exception javax.crypto.BadPaddingException: pad block corrupted is showed at method doFinal. public String decrypt(byte[] cipherText, SecretKey key, byte [] initialVector) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding"); IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector); cipher.init(Cipher.DECRYPT_MODE, key, ivParameterSpec); cipherText = cipher.doFinal(cipherText); return

Encrypt a file appending IVSBytes in unique file - Execption: Given final block not properly padded

由 谁说我不能喝 提交于 2019-12-05 10:53:28
问题 I'm trying to encrypt a file using AES with a SHA-256 Key. When I generate the IVs I preppend it at the beggining of the encrypted file, and append the rest. When I recover the IV's and compare it (the IV's after and then of the proces) they are the same. The problem is when I try to decrypt the file: javax.crypto.BadPaddingException: Given final block not properly padded I think it could be because i don't read properly the following bytes, but I revise the code and it seems Ok. Crypto class

Why do I get BadPaddingException when trying to encrypt a string?

由 不打扰是莪最后的温柔 提交于 2019-12-05 10:42:15
问题 I create an Encryption class to encryt/decrypt binary data in my Android project, by this link. package com.my.package; import java.security.SecureRandom; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; // TODO Incomplete class public class Encryption { private static final byte[] salt = { (byte) 0xA4, (byte) 0x0B, (byte) 0xC8, (byte) 0x34, (byte) 0xD6, (byte) 0x95, (byte) 0xF3, (byte) 0x13 }; private static

AES File decrypting “given final block not properly padded”

由 做~自己de王妃 提交于 2019-12-05 07:32:44
问题 I want to encrypt and then decrypt file use AES. I have read many topics about error "Given final block not properly padded" . But i don't find solution for me. Sorry about specify the language of my code, i don't know write language java Here is my code : Variables // IV, secret, salt in the same time private byte[] salt = { 'h', 'u', 'n', 'g', 'd', 'h', '9', '4' }; public byte[] iv; public SecretKey secret; createSecretKey public void createSecretKey(String password){ SecretKeyFactory

Encrypt a file appending IVSBytes in unique file - Execption: Given final block not properly padded

由 ε祈祈猫儿з 提交于 2019-12-03 21:51:21
I'm trying to encrypt a file using AES with a SHA-256 Key. When I generate the IVs I preppend it at the beggining of the encrypted file, and append the rest. When I recover the IV's and compare it (the IV's after and then of the proces) they are the same. The problem is when I try to decrypt the file: javax.crypto.BadPaddingException: Given final block not properly padded I think it could be because i don't read properly the following bytes, but I revise the code and it seems Ok. Crypto class: private static String password; private static String salt; private static int pswdIterations = 65536

Java AES decryption BadPaddingException

由 十年热恋 提交于 2019-12-03 20:47:34
note: Java NOOB. Alright, I know this has been answered a few dozen times on here, but the solutions don't seem to work/apply directly to where I understand them. (Yes, I know I don't completely understand encryption/decryption, AES, etc. but that is not the point, I am trying to understand this) I have a utility api where I want to pass a string and return an encrypted string. Then I want to pass the encrypted string, and return a decrypted string. Simple. It works fine for many strings I pass in, but on some, I'm getting the exception javax.crypto.BadPaddingException: Given final block not

BadPaddingException when decrypting AES with the same key

由 三世轮回 提交于 2019-12-03 15:00:59
问题 This is the tester: public class CryptographySimpleTests extends ActivityTestCase { public void testsCryptographyClass_encryptAndDecrypt() { final String orgVal = "hi world! :D"; final String key = "key"; try { final byte[] encryptKey = Cryptography.deriveAES256Key(key); final byte[] decryptKey = Cryptography.deriveAES256Key(key); //Deviation method Assert.assertTrue(Arrays.equals(encryptKey, decryptKey)); byte[] encrypted = Cryptography.encryptAES(encryptKey, orgVal.getBytes()); Assert

RSA BadPaddingException in Java - encrypt in Android decrypt in JRE

由 青春壹個敷衍的年華 提交于 2019-12-03 14:02:28
问题 i found some other questions but i did not find a explaination what causes this. I wrote a function in Java to encrypt data, store it into a file and decrypt it loading the file again. As it is a asymetric encryption, i have a public and a private key that is directly stored in the code for testing purpose. The problem seem to be a difference in the encryption itselfs as the function work on android as well as on a windows machine with java RE 7 installed. But it is not possible to encrypt
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