3des

php: mcrypt_encrypt to openssl_encrypt, and OPENSSL_ZERO_PADDING problems

由 [亡魂溺海] 提交于 2019-11-27 05:03:44
I have this mcrypt_encrypt call, for a given $key, $message and $iv: $string = mcrypt_encrypt(MCRYPT_3DES, $key, $message, MCRYPT_MODE_CBC, $iv); I'd like to change the mcrypt_encrypt call to an openssl_encrypt one, to future-proof this. By having $mode = 'des-ede3-cbc' or $mode = '3DES'; and $options = true I get the more similar response, but not identical. Is there other way to call it to get a perfect match? I'm getting this (base64_encoded) for a lorem-ipsum $message + $key combinations, so I'm starting to believe one function or the other are padding somewhat the message before

Is DES or 3DES still being used today?

由 白昼怎懂夜的黑 提交于 2019-11-27 02:55:53
问题 I've written a DES implementation as an exercice and am now wondering if and where (triple-)DES is used today. I've read about banking cards using it, but I can't find any reliable source for it. 回答1: Triple-DES is still in use today but is widely considered a legacy encryption algorithm. DES is inherently insecure, while Triple-DES has much better security characteristics but is still considered problematic. NIST is the government organization that standardizes on cryptographic algorithms.

how to use RSA to encrypt files (huge data) in C#

由 拜拜、爱过 提交于 2019-11-26 21:28:39
I'm new to encryption. I need to implement asymmetric encryption algorithm, which i think it uses private/public key. I started using a sample of RSACryptoServiceProvider. it was ok with small data to encrypt. But when using it on relatively larger data "2 lines", i get the exception CryptographicException "Bad Length"! //Create a new instance of RSACryptoServiceProvider. using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider()) { //Import the RSA Key information. This only needs //toinclude the public key information. //RSA.ImportParameters(RSAKeyInfo); byte[] keyValue = Convert

3DES Key Size Matter in C#.Net

由 百般思念 提交于 2019-11-26 20:52:45
问题 Below Code is Working Fine in c#.NET byte[] key = Encoding.ASCII.GetByte("012345678901234567890123"); //24characters byte[] plainText = Encoding.ASCII.GetBytes("lasaa"); TripleDES des = TripleDES.Create(); des.Key = key; des.Mode = CipherMode.CBC; ICryptoTransform ic = des.CreateEncryptor(); byte[] enc = ic.TransformFinalBlock(plainText, 0, plainText.Length); MessageBox.Show(UTF8Encoding.UTF8.GetString(enc)); My questions regarding above are... How can I specify KeySize? if i use des.KeySize=

php: mcrypt_encrypt to openssl_encrypt, and OPENSSL_ZERO_PADDING problems

由 本小妞迷上赌 提交于 2019-11-26 12:46:58
问题 I have this mcrypt_encrypt call, for a given $key , $message and $iv : $string = mcrypt_encrypt(MCRYPT_3DES, $key, $message, MCRYPT_MODE_CBC, $iv); I\'d like to change the mcrypt_encrypt call to an openssl_encrypt one, to future-proof this. By having $mode = \'des-ede3-cbc\' or $mode = \'3DES\'; and $options = true I get the more similar response, but not identical. Is there other way to call it to get a perfect match? I\'m getting this (base64_encoded) for a lorem-ipsum $message + $key

How do I use 3DES encryption/decryption in Java?

由 牧云@^-^@ 提交于 2019-11-25 23:53:43
问题 Every method I write to encode a string in Java using 3DES can\'t be decrypted back to the original string. Does anyone have a simple code snippet that can just encode and then decode the string back to the original string? I know I\'m making a very silly mistake somewhere in this code. Here\'s what I\'ve been working with so far: ** note, I am not returning the BASE64 text from the encrypt method, and I am not base64 un-encoding in the decrypt method because I was trying to see if I was
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