我正在生成要从 Ruby 堆栈发送到 PHP 堆栈的数据。我在 Ruby 端使用 OpenSSL::Cipher 库和 PHP 中的“mcrypt”库。当我在 Ruby 中使用“aes-256-cbc”(256 位块大小)加密时,我需要在 PHP 中使用 MCRYPT_RIJNDAEL_128(128 位块大小)来解密它。我怀疑 Ruby 代码被破坏了,因为 cipher.iv_len 是 16;我认为应该是 32:
>> cipher = OpenSSL::Cipher::Cipher.new('aes-128-cbc')
=> #<OpenSSL::Cipher::Cipher:0x3067c5c>
>> cipher.key_len
=> 16
>> cipher.iv_len
=> 16
>> cipher = OpenSSL::Cipher::Cipher.new('aes-256-cbc')
=> #<OpenSSL::Cipher::Cipher:0x306de18>
>> cipher.key_len
=> 32
>> cipher.iv_len
=> 16
所以这是我的测试。在 Ruby 方面,首先我生成密钥和 iv:
>> cipher = OpenSSL::Cipher::Cipher.new('aes-256-cbc')
>> cipher.encrypt
>> iv = cipher.random_iv
>> iv64 = [iv].pack("m").strip
=> "vCkaypm5tPmtP3TF7aWrug=="
>> key = cipher.random_key
>> key64 = [key].pack("m").strip
=> "RIvFgoi9xZaHS/0Bp0J9WDRyND6Z7jrd3btiAfcQ8Y0="
然后我使用这些密钥进行加密:
>> plain_data = "Hi, Don, this is a string."
>> cipher = OpenSSL::Cipher::Cipher.new('aes-256-cbc')
>> cipher.encrypt
>> cipher.key = Base64.decode64(key64)
>> cipher.iv = Base64.decode64(iv64)
>> encrypted_data = cipher.update(plain_data)
>> encrypted_data << cipher.final
>> crypt64 = [encrypted_data].pack("m").strip
=> "5gfC/kJcnAV2fJI0haxnLcdraIKWgtu54UoznVxf8K0="
这是PHP解密:
$ruby_crypt = "5gfC/kJcnAV2fJI0haxnLcdraIKWgtu54UoznVxf8K0=";
$encrypted_data = base64_decode($ruby_crypt);
$key = base64_decode("RIvFgoi9xZaHS/0Bp0J9WDRyND6Z7jrd3btiAfcQ8Y0=");
$iv = base64_decode("vCkaypm5tPmtP3TF7aWrug==");
$result = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $encrypted_data, MCRYPT_MODE_CBC, $iv);
$unencrypt = rtrim($result, "\x00..\x1F");
print "\nUnencrypted token:\n'$unencrypt'\n";
RESULT:
Unencrypted token:
'Hi, Don, this is a string.'
我更喜欢使用更长的块大小。显然我误解了 API。帮助?