一个文件按32768字节为一个逻辑块,然后查找块内

import sys

def filter_blocks(input_path, output_path, target_hex):

"""按32KB块过滤包含目标十六进制模式的块

Args:

input_path: 输入文件路径

output_path: 输出文件路径

target_hex: 要查找的十六进制字符串(带0x前缀)

"""

# 移除0x前缀并转换为字节

target_hex = target_hex.lower().replace('0x', '')

target_bytes = bytes.fromhex(target_hex)

block_size = 32768 # 32KB块大小

with open(input_path, 'rb') as infile, open(output_path, 'wb') as outfile:

while True:

block = infile.read(block_size)

if not block:

break

if target_bytes not in block:

outfile.write(block)

if __name__ == '__main__':

if len(sys.argv) != 4:

print("用法: python hex_block_filter.py 输入文件输出文件 0x目标十六进制")

print("示例: python hex_block_filter.py input.bin output.bin 0x9c351d")

sys.exit(1)

filter_blocks(sys.argv[1], sys.argv[2], sys.argv[3])