如何在Ruby中使用AES 256 ECB PKCS5Padding加密数据 [英] how to encrypt data with AES 256 ECB PKCS5Padding in ruby

问题描述

我想使用PKCS5padding以AES 256位ECB模式加密数据 我的红宝石方法如下，如何在此处使用PKCS5Padding

I want encrypt data with AES 256bit ECB mode using PKCS5padding My ruby method is as follows, how to use PKCS5Padding here

def encrypt(raw_data,key)
  cipher = OpenSSL::Cipher::AES.new(256, :ECB)
  cipher.encrypt
  cipher.key = key
  encrypted_data = cipher.update(raw_data) + cipher.final
end

这里的密钥是OpenSSL :: PKey :: RSA类型，抛出no implicit conversion of OpenSSL::PKey::RSA into String异常

here key is OpenSSL::PKey::RSA type, throwing no implicit conversion of OpenSSL::PKey::RSA into String exception

推荐答案

您应该使用

key = cipher.random_key

代替RSA密钥

我已按照以下目的使用它

I have used it in following way for my purpose

1. 生成密码随机密钥
2. 使用这些密钥对数据进行AES加密
3. 在提供密钥之前，先使用RSA公钥对其进行加密

在接收方结束

1. 使用RSA私钥解密密码密钥
2. 使用生成的密码密钥解密数据

注意:我们无法使用基于RSA私钥/公钥的技术来加密大数据

Note: We can not encrypt large data with RSA private/public key based technique

Super secured Example

  # At sender side
  public_key_file = 'public.pem'

  message = 'Hey vishh you are awesome!!'
  cipher = OpenSSL::Cipher::AES.new(128, :CBC)
  cipher.encrypt
  aes_key = cipher.random_key
  encrypted_data = cipher.update(message) + cipher.final
  # encrypted_data is ready to travel

  rsa = OpenSSL::PKey::RSA.new(File.read(public_key_file))  
  rsa_cypher_key = rsa.public_encrypt(aes_key)
  # rsa_cypher_key is ready to travel

  # sending these data in encoded format is good idea
  encrypted_data = Base64.encode64(encrypted_data)
  rsa_cypher_key = Base64.encode64(rsa_cypher_key) 
  ====> encrypted_data + rsa_cypher_key =====> Travelling
  encrypted_data = Base64.decode64(encrypted_data)
  rsa_cypher_key = Base64.decode64(rsa_cypher_key) # decode the data

  # At recevier side
  private_key_file = 'private.pem'
  # Decrypt the cypher key with private key
  rsp = OpenSSL::PKey::RSA.new(File.read('./config/private.pem'))
  aes_key = private_key.private_decrypt(rsa_cypher_key)

  decipher = OpenSSL::Cipher::AES.new(128, :CBC)
  decipher.decrypt
  decipher.key = aes_key
  message = decipher.update(encrypted_data) + decipher.final
  p message
  'Hey vishh you are awesome!!'

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