aes | 易学教程

Using Jasypt for password based AES encryption with PBKDF2WithHmacSHA1 key

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问题 I'm implementing an encryption mechanism where I work, and the security guy's demands are as follows: Create a 256 bit key using PBKDF2WithHmacSHA512, secret password, 256bit salt and 20000 iterations minimum. Salt should be generated using SecureRandom.getInstance("SHA1PRNG"); Encrypt using AES256 with the derived key. I'm trying to use Jasypt's StandardPBEStringEncryptor class encryptor.setPassword(PASSWORD); encryptor.setAlgorithm("AES/CBC/PKCS5Padding"); encryptor

AES encryption/decryption

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问题 Here is some code that works well for strings: Public Function AESEncrypt(ByVal PlainText As String, ByVal Password As String, ByVal salt As String) Dim HashAlgorithm As String = "SHA1" 'Can be SHA1 or MD5 Dim PasswordIterations As String = 2 Dim InitialVector As String = "CanEncryption123" 'This should be a string of 16 ASCII characters. Dim KeySize As Integer = 256 'Can be 128, 192, or 256. If (String.IsNullOrEmpty(PlainText)) Then Return "" Exit Function End If Dim InitialVectorBytes As

How to encrypt serializable objects

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问题 I'm currently working on a client-server application in Java. Due to the requirements for the application I need to encrypt the traffic between client and server and decided to use a hybrid encryption approach where the server generates a public/private RSA key pair and the client generates an AES session key which will be encrypted using the RSA public key. As I'm completely new to encryption in Java I didn't start implementing it directly into my application so I don't crash anything. I set

Retrieve IV from RNCryptor AES 256 header in PHP

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问题 Using the latest source of RNCryptor and attempting to send the encrypted data to a PHP script. RNCryptor packages the IV into the header section which is prepended onto the actual encrypted data. - (NSData *)header { uint8_t header[2] = {kRNCryptorFileVersion, self.options}; NSMutableData *headerData = [NSMutableData dataWithBytes:header length:sizeof(header)]; if (self.options & kRNCryptorOptionHasPassword) { [headerData appendData:self.encryptionSalt]; // 8 bytes [headerData appendData

GSSException: [..] Encryption type AES256CTS mode with HMAC SHA1-96 is not supported/enabled

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问题 After setting our domain users to support AES encryption for Kerberos tokens (Windows Server 2008R2), on a web-application server side we get the following exception: GSSException: Failure unspecified at GSS-API level (Mechanism level: Encryption type AES256CTS mode with HMAC SHA1-96 is not supported/enabled) Strangely we have Java 6 (1.6.0_27) , which means that AES should be supported, according to this document: http://docs.oracle.com/javase/6/docs/technotes/guides/security/jgss/jgss

Encrypt folder or zip file using python

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问题 So I am trying to encrypt a directory using python and I'm not sure what the best way to do that is. I am easily able to turn the folder into a zip file, but from there I have tried looking up how to encrypt it with AES, but couldn't get that to work and I have also tried encrypting using 7zip to archive the folder, but also couldn't get that to work, so if anybody has another solution to encrypt a directory or could point me in the right direction on how to use one of the previous methods

R Tidyverse dplyr包学习笔记2

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Tidyverse 学习笔记 1.gapminder 我理解的gapminder应该是一个内置的数据集加载之后使用 > # Load the gapminder package > library(gapminder) > # Load the dplyr package > library(dplyr) > # Look at the gapminder dataset > gapminder A tibble: 1,704 x 6 country continent year lifeExp pop gdpPercap <fct> <fct> <int> <dbl> <int> <dbl> 1 Afghanistan Asia 1952 28.8 8425333 779. 2 Afghanistan Asia 1957 30.3 9240934 821. 3 Afghanistan Asia 1962 32.0 10267083 853. 4 Afghanistan Asia 1967 34.0 11537966 836. 5 Afghanistan Asia 1972 36.1 13079460 740. 6 Afghanistan Asia 1977 38.4 14880372 786. 7 Afghanistan Asia 1982 39.9 12881816 978.

Python AES Decryption Routine (Code Help)

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问题 I developed a code based on information available online regarding an AES Encryption and Decryption routine. Language: Python 2.7.x Complete Code - #!/usr/bin/python import sys, os import hashlib import base64 from Crypto.Cipher import AES ## Variables in computation. IV = u'1234567890123456' BLOCK_SIZE = 32 INTERRUPT = u'\u0001' PAD = u'\u0000' SECRET = os.urandom(32) filename=sys.argv[1] def AddPadding(data, interrupt, pad, block_size): new_data = ''.join([data, interrupt]) new_data_len =

CryptoJS AES Decryption Not Giving original ZIP/EPUB file in react native

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问题 I am using CryptoJS to encrypt my epub (or zip) file and decrypt it. I am using react native to create the app. But I don't know why the decrypted file is not the original epub file. The error while opening the decrypted epub file is: Error in opening zip file. And I am using react-native-fetch-blob for file reading and writing. Here is my code: Encryption encrypt() { // ENCRYPTION RNFetchBlob.fs.readFile(`${RNFetchBlob.fs.dirs.DownloadDir}/startup.epub`, 'base64') .then(result => { console

Encrypt/decrypt for Image on IOS

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问题 We are working with encrypt/decrypt and UIIMAGE. If we are encrypting and decrypting and UIIMAge without save into the iphone gallery, it works fine but If we encrypt, save into the gallery, load (the image encrypted)into the app and decryting it works bad. We are using this functions to encrypt/decrypt/save/load //encrypt UIImage *image = self.imageView.image; CGContextRef ctx; CGImageRef imageRef = [image CGImage]; NSUInteger width = CGImageGetWidth(imageRef); NSUInteger height =