In this tutorial, we’ll learn how to program "How to Find the Hash of a File in Python." We’ll focus on accurately hashing the targeted file into a secure sequence of characters. The objective is to achieve a proper hash of a given file format. I'll provide a sample program to demonstrate the coding process, making it easy to understand and implement. So, let’s get started with coding!

This topic is straightforward to understand. Just follow the instructions I provide, and you'll be able to complete it with ease. The program I'll show you demonstrates the correct way to hash a file. I'll also provide a simple and efficient method to achieve this effectively. So, let’s start coding!

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.

1. import
   
   hashlib
   
2. 
   
3. def
   
   compute_file_hash(
   
   file_path,
   
   algorithm=
   
   'sha256'
   
   )
   
   :
   
4. hash_func =
   
   hashlib.new
   
   (
   
   algorithm)
   
5. 
   
6. with
   
   open
   
   (
   
   file_path,
   
   'rb'
   
   )
   
   as
   
   file
   
   :
   
7. while
   
   chunk
   
   :=
   
   file
   
   .read
   
   (
   
   8192
   
   )
   
   :
   
8. hash_func.update
   
   (
   
   chunk
   
   )
   
9. 
   
10. return
    
    hash_func.hexdigest
    
    (
    
    )
    
11. 
    
12. def
    
    main(
    
    )
    
    :
    
13. while
    
    True
    
    :
    
14. print
    
    (
    
    "\n
    
    ================= Find Hash of File =================\n
    
    \n
    
    "
    
    )
    
15. file_path =
    
    input
    
    (
    
    "Enter the full filename: "
    
    )
    
16. print
    
    (
    
    "\n
    
    "
    
    )
    
17. algorithm =
    
    input
    
    (
    
    "Enter the hash algorithm (e.g., md5, sha1, sha256): "
    
    )
    
18. print
    
    (
    
    "\n
    
    "
    
    )
    
19. try
    
    :
    
20. file_hash =
    
    compute_file_hash(
    
    file_path,
    
    algorithm)
    
21. print
    
    (
    
    f"The {algorithm} hash of the file is: {file_hash}"
    
    )
    
22. except
    
    FileNotFoundError:
    
23. print
    
    (
    
    "File not found. Please enter a valid file path."
    
    )
    
24. except
    
    ValueError
    
    :
    
25. print
    
    (
    
    f"Invalid hash algorithm: {algorithm}. Please enter a valid algorithm (e.g., md5, sha1, sha256)."
    
    )
    
26. 
    
27. opt =
    
    input
    
    (
    
    "\n
    
    Do you want to try again?(yes/no): "
    
    )
    
28. 
    
29. if
    
    opt.lower
    
    (
    
    )
    
    ==
    
    'yes'
    
    :
    
30. ret=
    
    False
    
31. elif
    
    opt.lower
    
    (
    
    )
    
    ==
    
    'no'
    
    :
    
32. ret=
    
    True
    
33. print
    
    (
    
    "Exiting program...."
    
    )
    
34. else
    
    :
    
35. print
    
    (
    
    "Please enter yes/no:"
    
    )
    
36. break
    
37. 
    
38. if
    
    ret ==
    
    False
    
    :
    
39. continue
    
40. if
    
    __name__ ==
    
    "__main__"
    
    :
    
41. main(
    
    )
    

This program calculates the cryptographic hash of a file based on a specified algorithm (such as MD5, SHA-1, or SHA-256). It reads the file in binary mode in chunks, updating the hash until the file is fully processed, and then returns the file's hash digest in hexadecimal format. The user can specify the hash algorithm and file path, and the program will validate both inputs, catching cases where the file doesn’t exist or the algorithm name is invalid. After each hash calculation, the user has the option to repeat the process or exit.

Output:


There you have it we successfully created How to Find Hash of File in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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