aes

问题 I have been trying to implement Ciphertext Stealing(CTS) in PHP for CBC. Referring below two links How can I encrypt/decrypt data using AES CBC+CTS (ciphertext stealing) mode in PHP? and http://en.wikipedia.org/wiki/Ciphertext_stealing I am confused and stuck on the last and simplest step of XOR. I know this is silly but having tried all the combinations, i don't know what am i missing. Code follows. // 1. Decrypt the second to last ciphertext block, using zeros as IV. $second_to_last_cipher

问题 I tried to make simple test program with AES decryption using OpenSSL ibaries. The compiler/linker shows me an error. Compiler: Dev-Cpp [Linker error] undefined reference to `AES_set_decrypt_key' [Linker error] undefined reference to `AES_decrypt' code: #include <stdio.h> #include <openssl/aes.h> int main(){ AES_KEY k; unsigned char key[]="2641cf97291c6ea02b930a4e2a824990"; unsigned char in[]="adc8f4ad114433ffaf4597c9738d257c504db763c29d238aa05bd21e1107809f"; unsigned char out[150]; AES_set

问题 I am using the AES methods here: http://msdn.microsoft.com/en-us/library/system.security.cryptography.rijndaelmanaged.aspx I want to have a string value that I will convert to byte array and pass it to the AES encrypt method. How many characters should the string be to produce the correct byte array size that the method expects? static byte[] encryptStringToBytes_AES(string plainText, byte[] Key, byte[] IV) { // Check arguments. if (plainText == null || plainText.Length <= 0) throw new

问题 I am using OpenSSL's EVP interfaces to implement AES encryption using GCM mode. Now GCM, being one of the authentication modes, provides cipher text integrity. Meaning it generates a tag (MAC - message authentication code) on the cipher text (and additional data, if provided). This tag can later be checked before decryption, to ensure that the cipher text has not been modified. I have implemented the encryption as per this blog post: http://incog-izick.blogspot.in/2011/08/using-openssl-aes

问题 I'm trying to use BouncyCastle's CMac implementation but apparently I'm doing it wrong. At least the following unit test (based on RFC 5297 test vectors) fails: @Test public void testCMacOfZeros() { byte[] key = {(byte) 0xff, (byte) 0xfe, (byte) 0xfd, (byte) 0xfc, // (byte) 0xfb, (byte) 0xfa, (byte) 0xf9, (byte) 0xf8, // (byte) 0xf7, (byte) 0xf6, (byte) 0xf5, (byte) 0xf4, // (byte) 0xf3, (byte) 0xf2, (byte) 0xf1, (byte) 0xf0, // (byte) 0xf0, (byte) 0xf1, (byte) 0xf2, (byte) 0xf3, // (byte)

问题 I understand that in AES Counter mode I need to use a 128 bit nonce. The naïve way to do that would be to use a random 128 bit nonce, but I'm not sure the algorithm will be able to increment the counter correctly if it's passed as all random bits. I thought the correct way to do it is to use a 96 bit nonce and also a 32 bit counter starting at 0, for example: var key = CryptoJS.enc.Hex.parse('01ab23cd45ef67089a1b2c3d4e5f6a7b'); // 128 bits / 16 bytes var nonce = '2301cd4ef785690a1b2c3dab'; //

问题 I need to be compatible with Solaris crypto mech SUN_CKM_AES_CCM. In Linux, I believe I should setup an AEAD request to get "ccm(aes)" mech. Documentation for Linux Crypto does seem rather poor, the best example appears to be tcrypt.c test, and kernel sources. From Solaris, I did a test encryption of a 512 byte block, with 16 byte hmac, and 12 byte iv. This needs to stay the same, and hopefully the results be identical. However, what I think should would work, does not; struct crypto_aead

问题 I have an aes encryption code, i want to make it only return alphanumerical characters like {0123456789ABCDEFGHIJKLMNOPQRSTWUVYZ} But however i could not figure out how to do that. I have almost no idea about encryption, could not figure out where to fix. I would really apreciate your feedback. Regards... public class clsCrypto { private string _KEY = string.Empty; protected internal string KEY { get { return _KEY; } set { if (!string.IsNullOrEmpty(value)) { _KEY = value; } } } private string

问题 Alright, turns out I suck at Encryption/Decryption. I just dont get it. How can I make Java encrypt String message1 = "hello world"; with String salt = "mySalt"; using AES encryption? also how can I decrypt it once encrypted? If you have the time to provide the most basic code, it would help me a lot. Also 1 general question about AES encryption, using the same salt, will the same message always have the same encryption? Thanks in advance. 回答1: AES doesn't have a concept of a salt. It just

问题 I'm reverse engineering an API and I found out that it uses AES-256-CBC for encryption. I also found out that it uses EVP_BytesToKey to encrypt HTTP requests. After I found out about this I tested it but I had some issues (probably because I'm inexperienced). I don't know where to put the password And this is what needs to be decrypted: FP2xttTh/wm5Kr45Vh/PEvsdxgfL3NgxxMMk9hTkPfJd7vSJXTlhjiZlQajnBcMAVknANpv5FNCMRD+epDSOA2epKOzstSmhC0il2TlwgKqaT