aes

I generate 128bit AES/CBC/PKCS5Padding key using Java javax.crypto API. Here is the algorithm that I use: public static String encryptAES(String data, String secretKey) { try { byte[] secretKeys = Hashing.sha1().hashString(secretKey, Charsets.UTF_8) .toString().substring(0, 16) .getBytes(Charsets.UTF_8); final SecretKey secret = new SecretKeySpec(secretKeys, "AES"); final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, secret); final AlgorithmParameters params = cipher.getParameters(); final byte[] iv = params.getParameterSpec(IvParameterSpec.class)

Something is funky with the following AES class I've written to do encryption and decryption. When I copy of the AES object and I choose to encrypt plain text, and then I immediately attempt to decrypt the text I just encrypted, it doesn't decrypt it fully (and does it differently every time). e.g. I'm initializing it with a simple JSP like this: <%@page import="com.myclass.util.AES"%> <% String hexMessage = "0xe800a86d90d2074fbf339aa70b6d0f62f047db15ef04c86b488a1dda3c6c4f2f2bbb444a8c709bbb4c29c7ff1f1e"; String keyText = "12345678abcdefgh";//*/ AES e = new AES(); //e.setKey(keyText); String

I need to encrypt an audio file while it is being generated. I am encrypting header with dummy data(because I don't know the actual size of audio data) at the starting and encrypting the audio data on the fly. My plan is to update the header at the end with actual data size of audio file. But, When I tried to overwrite the encrypted header data with newly encrypted header data of same size by using same key and IV and try to decrypt later, I am getting junk data generated. Why is this happening even though I am using same key and IV? In the below code I tried to simulate what I am doing.

I want to use rijndael aes128 for encryption in ruby. I have this code: cipher = OpenSSL::Cipher::Cipher.new("aes-128-cbc") cipher.encrypt cipher.key = 'abcdef0123456789abcdef0123456789' cipher.iv = '0000000000000000' encrypted = cipher.update('2~1~000024~0910~20130723092446~T~00002000~USD~F~375019001012120~0~0~00000000000~') encrypted << cipher.final which is not working. But using this PHP function: <?php function hex2bin($hex_string) { return pack('H*', $hex_string); } $data_to_encrypt = '2~1~000024~0910~20130723092446~T~00002000~USD~F~375019001012120~0~0~00000000000~'; $key =

I'm trying to decrypt AES-256 with IGE. But i don't know how use 256 bit key. in code key - byte[] with length == 32; IV . length == 32; BlockSize == 16 Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding"); cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key, "AES")); Xprev = java.util.Arrays.copyOfRange(IV, 0, BlockSize); Yprev = java.util.Arrays.copyOfRange(IV, BlockSize, IV.length); Decripted = new byte[0]; for (int i = 0; i < Message.length; i += BlockSize) { Y = java.util.Arrays.copyOfRange(Message, i, i+BlockSize); X = XOR(cipher.doFinal(XOR(Y,Xprev)), Yprev); Xprev = X; Yprev = Y;

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

This question already has answers here : Closed 2 years ago . InvalidKeyException Illegal key size (5 answers) Actually I am getting InvalidKeyException: Illegal key size, but same code is working in production. When I am trying to run this code locally, I am facing key size issue while decoding in below line: cipher.init(2, new SecretKeySpec(secretKey, "AES"), new IvParameterSpec(initVector)); In above line I am getting following exception: public byte[] getPageByteStream(String fileName) throws DMSApplicationException { logger.info(GridFsPagesDAOImpl.class + " Entering in to

I'm working on project when some arbitrary data are encrypted using Python simple-crypt (source here ) and same encrypted data are then used in java application. I would like to understand conceptual difference between JSSE and Pycrypto. This is python part doing encryption ( source ): counter = Counter.new(HALF_BLOCK, prefix=salt[:HALF_BLOCK//8]) cipher = AES.new(cipher_key, AES.MODE_CTR, counter=counter) This is my attempt for java re-implementation of same operation: SecretKeySpec key = new SecretKeySpec(cipher_key, "AES"); IvParameterSpec ivSpec = new IvParameterSpec(salt, 0, HALF_BLOCK /

I want to encrypt all the data I send through the Java/C# sockets (Java server, C# client). I would like to use AES256, but I can't get the Java and C# to generate the same encrypted code. Can anyone give me two examples, 1 in Java and 1 in C# that generate the same results and decrypts the results properly? What I tried so far: public Encrypt(AOBCore instance){ try { String message="This is just an example"; // Get the KeyGenerator KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(256); // 192 and 256 bits may not be available // Generate the secret key specs. SecretKey skey =

I am trying to encrypt in C++ using CryptoAPI and decrypt Java using SunJCE. I have gotten the RSA key to work -- and verified on a test string. However, my AES key is not working -- I get javax.crypto.BadPaddingException: Given final block not properly padded . C++ Encryption: // init and gen key HCRYPTPROV provider; CryptAcquireContext(&provider, NULL, MS_ENH_RSA_AES_PROV, PROV_RSA_AES, CRYPT_VERIFYCONTEXT); // Use symmetric key encryption HCRYPTKEY sessionKey; DWORD exportKeyLen; CryptGenKey(provider, CALG_AES_128, CRYPT_EXPORTABLE, &sessionKey); // Export key BYTE exportKey[1024];