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Computer Forensics World :: View topic - Hash calculation between image and original file
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Hash calculation between image and original file

 
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dfsdfs
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PostPosted: Mon Sep 25, 2017 8:54 pm    Post subject: Hash calculation between image and original file Reply with quote

Most of the imaging software can image a large drive. The image saved as several files.

1) I want to know how they calculate hash among original file location and image file. Source location have several folders.

2) Image save as split files. There are several files. How to calculate a single hash using several images.
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athulin
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PostPosted: Sat Sep 30, 2017 4:24 pm    Post subject: Re: Hash calculation between image and original file Reply with quote

dfsdfs wrote:
1) I want to know how they calculate hash among original file location and image file. Source location have several folders.


You may need to try to rephrase that question: I'm not sure I understand what you are asking when you say 'among original file location'.

What kind of image? Logical image or physical? What imaging software?

As imaging software may do things differently, an answer is likely to depend on what software you're asking about, and how it was invoked, including what type of image you are asking about (physical or logical).

Quote:
2) Image save as split files. There are several files. How to calculate a single hash using several images.


Again, depends on what the image format is. The simplest would be a raw format, in which case you simply concatenate the files, and hash the result. However, if images have a structure (as for example EnCase images do), you need to use tools specific for that format.

How you do that depends on the platform you're using: Linux? Windows? something else?
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