AES加密/解密Delphi& PHP

问题描述

我的Delphi应用程序使用TurboPower LockBox 3来加密使用AES 256的明文信息。我现在想用PHP解密这个信息。
但是TurboPower LockBox 3具有一些互操作性问题。

请查看LockBox 3作者在这里的详细信息：

在Stackoverflow上有一个类似的帖子

在LockBox 3中，在加密过程中，您设置了一个密码。然后将此密码用作种子以生成密钥，iv。所以有人能够模仿PHP方面的关键生成方法吗？或者有什么办法可以让LockBox 3生成Key / IV，并将其放在我的PHP代码中，以便可以对文件进行解密？

解决方案

IV

如前所述，是加密密文。所以要在PHP端获取它，只需提取前8个字节。

键

您需要决定共享密钥是密码字符串格式还是二进制密钥格式。对称关键类（TSymetricKey）有一个SaveToStream（）方法，它可以像您期望的那样工作。 TCodec组件具有Key属性，在您设置密码，链接模式和密码后，该属性将可用。

所有的方法都是自我记录的，几乎做了他们读的是什么，但是如果你需要一些演示代码，将一个密钥保存到流中，让我知道。

My Delphi application uses TurboPower LockBox 3 to encrypt a plaintext information using AES 256. I now want to decrypt this information using PHP.But TurboPower LockBox 3 has some interoperability issues.

Please check the post by LockBox 3 author here for details :

http://lockbox.seanbdurkin.id.au/tiki-view_forum_thread.php?comments_parentId=363&topics_offset=1

And a similar post on Stackoverflow

Secure keypair encryption solution in Delphi & PHP?

In LockBox 3, during encryption, you set a password. This password is then used as a seed to generate the key and iv. So has anyone been able to mimic the key generation method on PHP side ? Or is there any way i can get the Key/IV being generated by LockBox 3 and put it in my PHP code so the file can be decrypted ?

解决方案

IV

As stated to you before, the IV nonce is prepended to the ciphertext message. So to obtain it on the PHP side, simply extract the first 8 bytes.

Keys

You need to decide if the shared secret is in password-string format or binary key format. The symetric Key class (TSymetricKey) has a method SaveToStream(), which works as you would expect it to. The TCodec component has a Key property, which will be available after you set the cipher, chaining mode and password.

All of the methods are self-documenting and do pretty much what they read like, however if you need some demo code, saving a key to a stream, let me know.

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