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Ruby 的 OpenSSL API 中的哪个 Cipher 等效于 OpenSSL C 函数DES_ecb2_encrypt()？

我看到以下密码：

 irb(main):003:0> OpenSSL::Cipher.ciphers
 => ["AES-128-CBC", "AES-128-CFB", "AES-128-CFB1", "AES-128-CFB8", "AES-128-ECB", 
     "AES-128-OFB", "AES-192-CBC", "AES-192-CFB", "AES-192-CFB1", "AES-192-CFB8", 
     "AES-192-ECB", "AES-192-OFB", "AES-256-CBC", "AES-256-CFB", "AES-256-CFB1", 
     "AES-256-CFB8", "AES-256-ECB", "AES-256-OFB", "AES128", "AES192", "AES256", 
     "BF", "BF-CBC", "BF-CFB", "BF-ECB", "BF-OFB", "CAMELLIA-128-CBC", "CAMELLIA-128-CFB",
     "CAMELLIA-128-CFB1", "CAMELLIA-128-CFB8", "CAMELLIA-128-ECB", "CAMELLIA-128-OFB",
     "CAMELLIA-192-CBC", "CAMELLIA-192-CFB", "CAMELLIA-192-CFB1", "CAMELLIA-192-CFB8",
     "CAMELLIA-192-ECB", "CAMELLIA-192-OFB", "CAMELLIA-256-CBC", "CAMELLIA-256-CFB",
     "CAMELLIA-256-CFB1", "CAMELLIA-256-CFB8", "CAMELLIA-256-ECB", "CAMELLIA-256-OFB",
     "CAMELLIA128", "CAMELLIA192", "CAMELLIA256", "CAST", "CAST-cbc", "CAST5-CBC", 
     "CAST5-CFB", "CAST5-ECB", "CAST5-OFB", "DES", "DES-CBC", "DES-CFB", "DES-CFB1", 
     "DES-CFB8", "DES-ECB", "DES-EDE", "DES-EDE-CBC", "DES-EDE-CFB", "DES-EDE-OFB", 
     "DES-EDE3", "DES-EDE3-CBC", "DES-EDE3-CFB", "DES-EDE3-CFB1", "DES-EDE3-CFB8", 
     "DES-EDE3-OFB", "DES-OFB", "DES3", "DESX", "DESX-CBC", "RC2", "RC2-40-CBC", 
     "RC2-64-CBC", "RC2-CBC", "RC2-CFB", "RC2-ECB", "RC2-OFB", "RC4", "RC4-40", "SEED",
     "SEED-CBC", "SEED-CFB", "SEED-ECB", "SEED-OFB", "aes-128-cbc", "aes-128-cfb", 
     "aes-128-cfb1", "aes-128-cfb8", "aes-128-ecb", "aes-128-ofb", "aes-192-cbc", 
     "aes-192-cfb", "aes-192-cfb1", "aes-192-cfb8", "aes-192-ecb", "aes-192-ofb", 
     "aes-256-cbc", "aes-256-cfb", "aes-256-cfb1", "aes-256-cfb8", "aes-256-ecb", 
     "aes-256-ofb", "aes128", "aes192", "aes256", "bf", "bf-cbc", "bf-cfb", "bf-ecb", 
     "bf-ofb", "blowfish", "camellia-128-cbc", "camellia-128-cfb", "camellia-128-cfb1",
     "camellia-128-cfb8", "camellia-128-ecb", "camellia-128-ofb", "camellia-192-cbc",
     "camellia-192-cfb", "camellia-192-cfb1", "camellia-192-cfb8", "camellia-192-ecb",
     "camellia-192-ofb", "camellia-256-cbc", "camellia-256-cfb", "camellia-256-cfb1",
     "camellia-256-cfb8", "camellia-256-ecb", "camellia-256-ofb", "camellia128",
     "camellia192", "camellia256", "cast", "cast-cbc", "cast5-cbc", "cast5-cfb", 
     "cast5-ecb", "cast5-ofb", "des", "des-cbc", "des-cfb", "des-cfb1", "des-cfb8", 
     "des-ecb", "des-ede", "des-ede-cbc", "des-ede-cfb", "des-ede-ofb", "des-ede3", 
     "des-ede3-cbc", "des-ede3-cfb", "des-ede3-cfb1", "des-ede3-cfb8", "des-ede3-ofb",
     "des-ofb", "des3", "desx", "desx-cbc", "rc2", "rc2-40-cbc", "rc2-64-cbc", "rc2-cbc",
     "rc2-cfb", "rc2-ecb", "rc2-ofb", "rc4", "rc4-40", "seed", "seed-cbc", "seed-cfb",
     "seed-ecb", "seed-ofb"]

我基本上需要 C 中这个函数调用的 Ruby 等价物：

 DES_ecb2_encrypt((const_DES_cblock *)data, (DES_cblock *)data, &des_key1, &des_key2, 1);
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2 回答 2

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我从未使用过这种方法，但看起来它使用 des_key1 进行 2 密钥 3DES 加密，而不是第 3 密钥进行最终加密。这是3DES 的键控选项 2。看起来des-ede选项可能会满足您的需求。

encrypt = OpenSSL::Cipher::Cipher.new("des-ede")
encrypt.encrypt
encrypt.key= des_key1+des_key2
ct = encrypt.update(plain_text) + encrypt.final

当然还有解密

decrypt = OpenSSL::Cipher::Cipher.new("des-ede")
decrypt.decrypt
decrypt.key= des_key1+des_key2
pt = decrypt.update(ct) + decrypt.final
于 2013-05-31T03:22:42.080 回答
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我不想在这里回答我自己的问题，但我找到了解决方案。

我有一段用这个 C 代码加密的加密数据：

  DES_ecb3_encrypt(input,output, key1, key2, key1, 1)

根据 Triple-DES 文档，它是这样做的：

  cipher_text =Encrypt(key1,Decrypt(key2,Encrypt(key1,plain_text)))

为了解码 Ruby 中的 cipher_text，我这样做了： 

  decrypt.OpenSSL::Cipher::Cipher.new('des-ede3')
  decrypt.decrypt
  decrypt.key = key1 + key2 + key1 
  plain_text = decrypt(cipher_text)  #  gives correct result, but decrypt.final gives errors

  # plain_text = decrypt(cipher_text) + decrypt.final # DOES NOT WORK
  #  => OpenSSL::Cipher::CipherError: wrong final block length   ; WHY??

如果有人可以发表评论，我将不胜感激：

  • 为什么decypt.final会导致错误，虽然结果是正确的
于 2013-06-14T22:25:07.140 回答