cbc-mode

问题 I have created an application for Android in Java and used Cipher class to encrypt data with AES. Now I wanna take that algorithm into iOS with CommonCrypto class. The code works but has different results. This is the code in Java : public static String Decrypt(String text, String key) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); byte[] keyBytes = new byte[16]; byte[] b = key.getBytes("UTF-8"); int len = b.length; if (len > keyBytes.length) len = keyBytes

问题 I am trying to encrypt and decrypt a communication between a C++ library and a PHP server using OPENSSL library in both of them. I want to use the Blowfish CBC algorithm but it seems that the results are different between the C++ code and the PHP code. The C++ code is taken from here: This is the PHP code: <?php function strtohex($x) { $s=''; foreach (str_split($x) as $c) $s.=sprintf("%02X",ord($c)); return($s); } $encryptedMessage = openssl_encrypt("input", "BF-CBC", "123456", 0, "initvect")

问题 I am trying to encrypt and decrypt a communication between a C++ library and a PHP server using OPENSSL library in both of them. I want to use the Blowfish CBC algorithm but it seems that the results are different between the C++ code and the PHP code. The C++ code is taken from here: This is the PHP code: <?php function strtohex($x) { $s=''; foreach (str_split($x) as $c) $s.=sprintf("%02X",ord($c)); return($s); } $encryptedMessage = openssl_encrypt("input", "BF-CBC", "123456", 0, "initvect")

问题 I am already having encryption code in java. Now I want to consume APIs from my server. Even after trying various tutorials and sample codes I am not able to successfully decrypt the hash. I know fixed salt and IV is not recommended at all. But for simplicity and to understand the issue I have kept salt and IV to "00000000000000000000000000000000"; Hash After Encryption from Java = "XjxCg0KK0ZDWa4XMFhykIw=="; Private key used = "Mayur12354673645" Can someone please help me to decrypt above

来源： https://stackoverflow.com/questions/62987347/invalid-key-length-error-using-createdecipheriv-from-crypto

来源： https://stackoverflow.com/questions/62987347/invalid-key-length-error-using-createdecipheriv-from-crypto

来源： https://stackoverflow.com/questions/63730549/vba-aes-cbc-encryption

问题 I am implementing DES - CBC. I am confused as to what cipher.init , cipher.update and cipher.dofinal do. I just use init to set the key and dofinal to get the result. I don't use update. Is that correct? Also whats the difference to the result when using UTF-8 and ASCII encodings? Here is my code: byte[] ciphertext; Cipher enc = Cipher.getInstance("DES/CBC/PKCS5Padding"); enc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "DES"), new IvParameterSpec(vector)); // Is this the complete

问题 I am using C-API of OpenSSL, but I am confused on how IV (Initialization Vector) is used in OpenSSL. Say, I have plaintext.txt file = "This is a top secret." Key = "example#########" IV = 010203040506070809000a0b0c0d0e0f when I encrypt this using OpenSSL AES-128-CBC , I should get: e5accdb667e8e569b1b34f423508c15422631198454e104ceb658f5918800c22 Which is true when I try this (key converted to hex): openssl enc -aes-128-cbc -e -in plaintext.txt -out ciphertext.bin -K

问题 Am trying to create a simple encryption/decryption using pycryptodome but keeping getting the following error: ValueError: Error 3 while encrypting in CBC mode after some digging I saw that you get this error if there is not enough data to encrypt, as in there is no padding in effect. The thing is that I've added a padding function. After debugging it seems as if my code literally skips the padding part completely and causes this error. What am I doing wrong? import os, random from Crypto