在C＃解密PKCS＃7加密数据 [英] Decrypting PKCS#7 encrypted data in C#

问题描述

我工作的一个解决方案，需要解密PKCS＃7加密数据，preferably在C＃。据我所看到的，.NET API支持这个功能通过System.Security.Cryptography.Pkcs命名空间。但似乎执行只能工作于字节数组。所以，我该怎么办时，我有一个不适合的内存？

I am working on a solution that needs to decrypt PKCS#7 encrypted data, preferably in C#. As far as I can see, the .NET api has support for this through the System.Security.Cryptography.Pkcs namespace. However it seems that the implementation can only work on byte arrays. So what do I do when I have a large encrypted file that does not fit into the memory?

我失去了一些东西在这里，或有另一种方式来做到这一点在流水平，而不是使用的ByteArray？

Am I missing something here, or is there another way to do this on a Stream level instead of using bytearrays?

推荐答案

在.NET框架对PKCS＃7 / CMS只有基本的支持，所以它不支持流媒体的数据。

The .NET framework has only rudimentary support for PKCS#7/CMS, so it does not support streaming the data.

您需要一个第三方库。正如其他人所说，BouncyCastle的是一个很好的选择。它支持的PKCS＃7（PKCS＃7也被称为CMS）的

You need a 3rd party library. As others have mentioned, BouncyCastle is an excellent choice. It does support PKCS#7 (PKCS#7 is also known as CMS).

他们的测试很可能是一个很好的地方去寻找样本code：<一href="http://www.bouncycastle.org/viewcvs/viewcvs.cgi/csharp/crypto/test/src/cms/test/EnvelopedDataStreamTest.cs?rev=1.5&content-type=text/vnd.viewcvs-markup"相对=nofollow> EnvelopedDataStreamTest.cs 。

Their tests are probably a good place to look for sample code: EnvelopedDataStreamTest.cs.

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