在 Ruby 中加密/解密 3DES

发布于 2024-10-07 15:17:07 字数 2462 浏览 2 评论 0原文

我有一个 key.bin 文件，其内容大致如下：

-12, 110, 93, 14, -48, ...

服务正在使用该文件来解密 3DES 内容，但我需要通过 Ruby 对其进行加密。

我已经尝试了很多关于如何设置密钥以及如何处理它的方案，但到目前为止还没有成功：

尝试将密钥按拆分，并将每个数字转换为十六进制，连接十六进制值以生成密钥
尝试过将数字字符串转换为二进制
尝试将生成的十六进制转换为二进制

我假设我需要做的事情很简单，例如：

des = OpenSSL::Cipher::Cipher.new('des3')
des.decrypt
des.key = mistery # this step is where i'm having problems at
final = des.update(encrypted) + des.final

关于我应该用这个密钥做什么的任何想法？

关键样本：

-62,-53,124,-110,37,-88,-48,31,-57,93,70,-101,44,69,-88,-57,-123,-99,118,-119,110,55,11,14

数据样本：

NEb2b9sYXgod6mTvaRv+MRsTJvIiTTI9VjnDGcxjxcN5qBH7FXvxYI6Oj16FeKKsoQvjAmdju2SQ
ifJqPJTl97xeEbjdwm+W8XJnWs99ku85EznVBhzQxI1H2jPiZIcrqIVCWdd/OQun7AjK4w2+5yb7
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原文

I have a key.bin file which content is something along the lines of:

-12, 110, 93, 14, -48, ...

This is being used by a service to decrypt 3DES content, but I need to encrypt it via Ruby.

I've tried loads of scenarios with how to set the key and what to do with it, but to no avail as of yet:

Tried splitting the key by , and converting each number to hex, concatenating the hex values to make the key
Tried converting the number string to binary
Tried converting the resulting hex to binary

I assume what I need to do is something simple like:

des = OpenSSL::Cipher::Cipher.new('des3')
des.decrypt
des.key = mistery # this step is where i'm having problems at
final = des.update(encrypted) + des.final

Any ideas on what I should do with this key?

Key sample:

-62,-53,124,-110,37,-88,-48,31,-57,93,70,-101,44,69,-88,-57,-123,-99,118,-119,110,55,11,14

Data sample:

NEb2b9sYXgod6mTvaRv+MRsTJvIiTTI9VjnDGcxjxcN5qBH7FXvxYI6Oj16FeKKsoQvjAmdju2SQ
ifJqPJTl97xeEbjdwm+W8XJnWs99ku85EznVBhzQxI1H2jPiZIcrqIVCWdd/OQun7AjK4w2+5yb7
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说谎友 2024-10-14 15:17:07

成功了！

具体方法如下：

解密

def read_key(key_file)
  File.read(key_file).split(',').map { |x| x.to_i }.pack('c*')
end
des = OpenSSL::Cipher::Cipher.new('des-ede3')
des.decrypt
des.key = read_key('key.bin')

result = des.update(decoded) + des.final

加密

def read_key(key_file)
  File.read(key_file).split(',').map { |x| x.to_i }.pack('c*')
end
des2 = OpenSSL::Cipher::Cipher.new('des-ede3')
des2.encrypt
des2.key = read_key('key.bin')

result = des2.update(result) + des2.final
puts Base64.encode64(result)

Got it working!

Here's how:

Decryption

def read_key(key_file)
  File.read(key_file).split(',').map { |x| x.to_i }.pack('c*')
end
des = OpenSSL::Cipher::Cipher.new('des-ede3')
des.decrypt
des.key = read_key('key.bin')

result = des.update(decoded) + des.final

Encryption

def read_key(key_file)
  File.read(key_file).split(',').map { |x| x.to_i }.pack('c*')
end
des2 = OpenSSL::Cipher::Cipher.new('des-ede3')
des2.encrypt
des2.key = read_key('key.bin')

result = des2.update(result) + des2.final
puts Base64.encode64(result)

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