aes

问题 I have been using the openssl function for encrypting data with AES-256-CBC in php. I have been able to encrypt it using an unique IV (by generating with openssl_random_pseudo_bytes)for each new encryption. But I am struggling with the idea of authenticated encryption with aes cbc. How do I basically authenticate when I am about to decrypt the data? Do I need to use something like PBKDF2, blowfish or hash_hmac()? Do I need to hash the key somehow? Any help is extremely appreciated. 回答1:

问题 Gibberish library provides a nice CBC algo... // In Jascascript GibberishAES.enc("Made with Gibberish\n", "password"); // Outputs: "U2FsdGVkX1+21O5RB08bavFTq7Yq/gChmXrO3f00tvJaT55A5pPvqw0zFVnHSW1o" # On the command line echo "U2FsdGVkX1+21O5RB08bavFTq7Yq/gChmXrO3f00tvJaT55A5pPvqw0zFVnHSW1o" | openssl enc -d -aes-256-cbc -a -k password How can I do this decryption in ruby? The straightforward way doesn't work... require 'openssl' def aes(m,k,t) (aes = OpenSSL::Cipher::Cipher.new('aes-256-cbc')

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

问题 I wish to encrypt a piece of data using AES (cbc) in java , I Want to use my own IV, which I have held in a byte array and my own key held in a byte array. How would I go about doing this? I'm searching for it to find tutorials on this topic. 回答1: This is probably the best guide that I've found on the subject. It explains the basics, one concept at a time, in simple terms. 回答2: Formally it encrypts the string into unreadable format. Use same code to decrypt. ENCRYPT: String s1="arshad"; char[

问题 I need to encrypt/decrypt data with PHP. I am completely new to this, however I have read that Libsodium-PHP is the best tool for AES encryption. Much like the other PHP encryption libraries I have researched Libsoduim-PHP seemed to offer almost no documentation of how to use the library (that I was able to find). Can anyone that has experience with PHP encryption either point me in the direction of a good learning resource or write a few lines of sample code using Libsoduim-PHP? Thank you

问题 PHP Function: $privateKey = "1234567812345678"; $iv = "1234567812345678"; $data = "Test string"; $encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $privateKey, $data, MCRYPT_MODE_CBC, $iv); echo(base64_encode($encrypted)); Result: iz1qFlQJfs6Ycp+gcc2z4w== Java Function public static String encrypt() throws Exception{ try{ String data = "Test string"; String key = "1234567812345678"; String iv = "1234567812345678"; javax.crypto.spec.SecretKeySpec keyspec = new javax.crypto.spec.SecretKeySpec

问题 CLI $ echo -n "TEST1" | openssl enc -aes256 -k FUUU -nosalt -a bYbkQJcDFZt3y3UQEMbEeg== iOS NSString *leSYT = @"bYbkQJcDFZt3y3UQEMbEeg=="; NSData *data = [NSData dataFromBase64String:leSYT]; NSLog(@"%@",[data AES256DecryptWithKey:@"FUUU"]); iOS doesn't output anything since it failed. What am I missing? NSData additions: http://pastie.org/426530 // NSData+Base64 by Matt Gallagher 回答1: The -k option in OpenSSL's enc utility derives an AES key and IV from your passphrase "FUUU". You can use the

问题 I'm working on an encryption system that passes the data to a 3rd party application. The encryption is done in Java and the decryption is done in PHP. Despite several attempts I can't get the encrypted string to be opened by the PHP application. For testing purposes I created a PHP script that also encrypts the data, so I could compare the Java and PHP encrypted strings. The results match up to the 21st character, and then they differ. This is what I have: // Java - Encrypt private String

问题 AES Encryption in PHP and ColdFusion9 is producing different results. Could somebody please help me? The below PHP Code $key = "12345678123456781234567812345678"; $iv = "1234567812345678"; $data = "This is a plain string."; echo base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv)); gives me G+tdEOfQTtVCQGxW3N5uzkqN207OyfIPxS6zf2xrKKY= While the below ColdFusion Code <cfset thePlainData = "This is a plain string." /> <cfset theKey =

问题 I've compiled some AES implementation code from this site, it's supposed to perfrom a 128 bits key encryption. I tested the encryption/decryption programs which work OK together. However if I encrypt anything with the mentioned code and then try to decrypt it by openssl tool built-in in linux, I just can't get decrypt it, it even logs me the bad magic number error. Same, if I encrypt anything with openssl and try to decrypt with the code won't work. I tried with both cbc ecb. If they're both