红宝石鱼在最后的位数差异 [英] Ruby blowfish difference in the last digits

问题描述

我有一些来自API提供商的测试数据键/文本/加密，现在尝试使用以下功能产生相同的加密结果，但是我的结果与241位数字中最后16位中提供的结果相同。你有什么想法，原因可能是什么？
我确保，bf-ecb是正确的模式，并尝试使用url编码，但迄今没有成功。

 code> require'openssl'
 
 def加密（key，data）
 cipher = OpenSSL :: Cipher :: Cipher.new（'bf-ecb'）send（加密）
 cipher.key = key 
 result = cipher.update（data）<< cipher.final 
 
 hexed =''
 result.each_byte {| c | hexed< '％02x'％c} 
 hexed.upcase 
 end 
  

更新

还尝试解密示例结果导致OpenSSL :: Cipher :: CipherErrorbad decrypt

解决方案

确实是填充问题。我解决了它，并将其自动执行。
到目前为止，它有效。

这是它的样子：

 code> require'openssl'
 
 def加密（key，data）
 cipher = OpenSSL :: Cipher :: Cipher.newbf-ecb
 cipher。 padding = 0 
 cipher.key = key 
 cipher.encrypt 
 enhex（cipher.update padd data）
 end 
 def decrypt（key，data，len）
 cipher = OpenSSL :: Cipher :: Cipher.newbf-ecb
 cipher.padding = 0 
 cipher.key = key 
 cipher.decrypt 
 .update dehex（data））。slice（0，len）
 end 
 def enhex（data）
 hexed =''
 data.each_byte {| c | hexed< '％02x'％c} 
 hexed.upcase 
 end 
 def dehex（data）
 data.scan（/../）。map {| b | b.to_i（16）} .pack（'C *'）
 end 
 def padd（data）
 data +*（8  - （data.length％8））
 end 
  

I have some testdata key/text/encrypted from an API provider and am now trying to yield the same encrypted result with the function below, but my result diverts from the provided one in the last 16 of 241 digits. Do you have an idea, what the reason may be? I ensured, that 'bf-ecb' is the right mode, and experimented with url-encoding, but so far without success.

require 'openssl'

def encrypt(key, data)
    cipher = OpenSSL::Cipher::Cipher.new('bf-ecb').send(:encrypt)
    cipher.key = key
    result = cipher.update(data) << cipher.final

    hexed = ''
    result.each_byte { |c| hexed << '%02x' % c }
    hexed.upcase
end

UPDATE

Also trying to decrypt the example result results in an OpenSSL::Cipher::CipherError "bad decrypt"

解决方案

It was indeed a problem with the padding. I worked around it with deactivating it and implementing it by myself. So far it works.

This is how it looks like:

require 'openssl'

def encrypt(key,data)
  cipher = OpenSSL::Cipher::Cipher.new "bf-ecb"
  cipher.padding = 0
  cipher.key = key
  cipher.encrypt
  enhex(cipher.update padd data)
end
def decrypt(key,data,len)
  cipher = OpenSSL::Cipher::Cipher.new "bf-ecb"
  cipher.padding = 0
  cipher.key = key
  cipher.decrypt
  (cipher.update dehex(data)).slice(0,len)
end
def enhex(data)
  hexed = ''
  data.each_byte { |c| hexed << '%02x' % c }
  hexed.upcase
end
def dehex(data)
  data.scan(/../).map{ |b| b.to_i(16) }.pack('C*')
end 
def padd(data)
  data + " "*(8 - (data.length % 8))
end

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