How do I hash two blocks of data with HashAlgorithm in C#?

Question

I need to hash a password with salt in C#. Salt is obtained from one source and is of type byte[], password is obtained from another source and is of type String.

Computing a hash of one block is quite easy - just call HashAlgorithm.ComputeHash() and it's done, but how do I compute a hash of two blocks without first building their concatenation?

Grant Thomas · Accepted Answer · 2011-04-28 11:39:23Z

3

You'll want to look into the TransformBlock and TransformFinalBlock methods.

The latter MSDN link exemplifies use of both with a code sample that is potentially to much to post here.

answered Apr 28, 2011 at 11:39

Grant Thomas

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Nick · Accepted Answer · 2011-04-28 11:38:51Z

1

Use TransformBlock and TransformFinalBlock and then use the Hash property.

answered Apr 28, 2011 at 11:38

Nick

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1 Comment

Jonathon Reinhart Over a year ago

I'm confused about the outbutBuffer parameter to TransformBlock - why do we need to copy the data?

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