[IronPython] Copying a cryptographic context

Sanghyeon Seo sanxiyn at gmail.com
Wed Oct 11 10:44:48 CEST 2006

Python's hash objects can be copied by copy() method. To quote the
library reference, "This can be used to efficiently compute the
digests of strings that share a common initial substring."


I couldn't find any way to copy a cryptographic context encapsulated
by HashAlgorithm instances on .NET framework. I found this curious, as
this is so clearly useful.

Someone suggested that this is same as SSPI(Security Service Provider
Interface), which also doesn't provide any way to copy a cryptographic
context. But this can't be the reason, as .NET framework's SHA*
classes are implemented in the managed code.

Can anyone shed some light?

Seo Sanghyeon

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