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import os
import hashlib
def sha256sum(file):
block_size = 16 * 1024 * 1024 # 16 MB block size
b = bytearray(block_size)
file_hash = hashlib.sha256()
mv = memoryview(b)
with open(file, 'rb', buffering=0) as f:
while True:
n = f.readinto(mv)
if not n:
break
file_hash.update(mv[:n])
return file_hash.hexdigest()
# Define the path to the llama directory (parent folder of script directory)
llama_path = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
# Define the file with the list of hashes and filenames
hash_list_file = os.path.join(llama_path, "SHA256SUMS")
# Check if the hash list file exists
if not os.path.exists(hash_list_file):
print(f"Hash list file not found: {hash_list_file}")
exit(1)
# Read the hash file content and split it into an array of lines
with open(hash_list_file, "r") as f:
hash_list = f.read().splitlines()
# Create an array to store the results
results = []
# Loop over each line in the hash list
for line in hash_list:
# Split the line into hash and filename
hash_value, filename = line.split(" ")
# Get the full path of the file by joining the llama path and the filename
file_path = os.path.join(llama_path, filename)
# Informing user of the progress of the integrity check
print(f"Verifying the checksum of {file_path}")
# Check if the file exists
if os.path.exists(file_path):
# Calculate the SHA256 checksum of the file using hashlib
file_hash = sha256sum(file_path)
# Compare the file hash with the expected hash
if file_hash == hash_value:
valid_checksum = "V"
file_missing = ""
else:
valid_checksum = ""
file_missing = ""
else:
valid_checksum = ""
file_missing = "X"
# Add the results to the array
results.append({
"filename": filename,
"valid checksum": valid_checksum,
"file missing": file_missing
})
# Print column headers for results table
print("\n" + "filename".ljust(40) + "valid checksum".center(20) + "file missing".center(20))
print("-" * 80)
# Output the results as a table
for r in results:
print(f"{r['filename']:40} {r['valid checksum']:^20} {r['file missing']:^20}")
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