aes

问题 I saw some code like string password = "11111111"; byte[] salt = Encoding.ASCII.GetBytes("22222222"); Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(password, salt); RijndaelAlg.Key = key.GetBytes(RijndaelAlg.KeySize / 8); I can see the key is generated by Rfc2898DeriveBytes with passphrase and salt. Then AES retrieves the key by GetBytes. But the question is, what does RFC2898DeriveBytes do and what key.GetBytes(cb) do? Could anyone elaborate this? I couldn't get it from the documentation.

问题 I have an SQL Server 2008 table with a structure similar to the following: ID int PRIMARY KEY IDENTITY(1,1) Name nvarchar(100) LongText ntext What I am trying to achieve is simple. Before inserting data inside this table, I want to encrypt the LongText using AES_192 algorithm. I am using the following SP to encrypt data: create proc sp_Encrypt_LongText @rawText ntext = null, @encryptedText nvarchar(max) output as begin OPEN SYMMETRIC KEY Encryption_Symmetric_Key DECRYPTION BY CERTIFICATE

问题 I have an SQL Server 2008 table with a structure similar to the following: ID int PRIMARY KEY IDENTITY(1,1) Name nvarchar(100) LongText ntext What I am trying to achieve is simple. Before inserting data inside this table, I want to encrypt the LongText using AES_192 algorithm. I am using the following SP to encrypt data: create proc sp_Encrypt_LongText @rawText ntext = null, @encryptedText nvarchar(max) output as begin OPEN SYMMETRIC KEY Encryption_Symmetric_Key DECRYPTION BY CERTIFICATE

问题 I have a Java Application that uses "AES-128 bits/ECB/PKCS5Padding" (java8 linux/window), the code is quite simple KeyGenerator keygen = KeyGenerator.getInstance("AES"); SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); secureRandom.setSeed(seed.getBytes()); keygen.init(128, secureRandom); ... Because I can't find the javascript equivalent to SHA1PRNG algorithm I can't decrypt the text using js code. But after reading Decrypt AES/CBC/PKCS5Padding with CryptoJS and with some

问题 I have decrypted a string and it works properly but when I am trying to encrypt the output string not getting the same result. public static void main(String[] args) { // TODO Auto-generated method stub String cipherstring = "9AnBHCNAZkfJiY5DW+DwtHVGDmJtTwU4G3yg3JLeELc="; byte[] cipherByte = Base64.getDecoder().decode(cipherstring); String cum006333 = decrypt(cipherstring, "KEY@CRISIL123"); System.out.println("decrpted output: " + cum006333); String enc = encrypt(cum006333, "KEY@CRISIL123");

问题 I have decrypted a string and it works properly but when I am trying to encrypt the output string not getting the same result. public static void main(String[] args) { // TODO Auto-generated method stub String cipherstring = "9AnBHCNAZkfJiY5DW+DwtHVGDmJtTwU4G3yg3JLeELc="; byte[] cipherByte = Base64.getDecoder().decode(cipherstring); String cum006333 = decrypt(cipherstring, "KEY@CRISIL123"); System.out.println("decrpted output: " + cum006333); String enc = encrypt(cum006333, "KEY@CRISIL123");

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

问题 I am implementing a basic encryption/decryption set of functions in nodejs and I keep getting the following error in the decryption part: Error: Unsupported state or unable to authenticate data This is my code so far: import crypto from 'crypto' import logger from './logger' const ALGORITHM = 'aes-256-gcm' export const encrypt = (keyBuffer, dataBuffer, aadBuffer) => { // iv stands for "initialization vector" const iv = Buffer.from(crypto.randomBytes(12), 'utf8') logger.debug('iv: ', iv) const

问题 I am implementing a basic encryption/decryption set of functions in nodejs and I keep getting the following error in the decryption part: Error: Unsupported state or unable to authenticate data This is my code so far: import crypto from 'crypto' import logger from './logger' const ALGORITHM = 'aes-256-gcm' export const encrypt = (keyBuffer, dataBuffer, aadBuffer) => { // iv stands for "initialization vector" const iv = Buffer.from(crypto.randomBytes(12), 'utf8') logger.debug('iv: ', iv) const

问题 I have implemented the AES encryption (homework), but I stumble upon the problem of padding the messages. If my messages are arrays of bytes as such: public byte[] encrypt(byte[] message) { int size = (int) Math.ceil(message.length / 16.0); byte[] result = new byte[size * 16]; for (int i = 0; i < size; i++) { if ((i+1) * 16 > message.length){ //padding here???? } else { byte[] block = Arrays.copyOfRange(message, i * 16, (i + 1) * 16); byte[] encryptedBlock = encryptBlock(block); System