pyimg4_img4_decrypt_decompress_and_info_extraction.py

1from pyimg4 import Img4
2
3# Read an IMG4 file from disk
4with open('iBSS.iphone12.RELEASE.im4p', 'rb') as f:
5    data = f.read()
6
7# Initialize the Img4 object
8img4 = Img4(data)
9
10# Print information about the image
11print(f"Image Tag: {img4.tag}")
12print(f"Image Type: {img4.im4p.type}")
13
14# If the image is encrypted, decrypt it (requires keys)
15if img4.im4p.encrypted:
16    # Example keys (usually obtained from a firmware decryption site)
17    iv = bytes.fromhex('...')
18    key = bytes.fromhex('...')
19    img4.im4p.decrypt(iv, key)
20
21# Decompress the image data
22decrypted_data = img4.im4p.data