import hashlib

def md5_encrypt_string(input_str: str) -> str:
    """對字符串進行MD5加密"""
    # 將字符串編碼為字節(jié)序列
    input_bytes = input_str.encode('utf-8')
    
    # 創(chuàng)建MD5哈希對象
    hasher = hashlib.md5()
    hasher.update(input_bytes)
    
    # 返回十六進制格式哈希值
    return hasher.hexdigest()

# 測試用例
print(md5_encrypt_string("Hello World"))  # 輸出：b10a8db164e0754105b7a99be72e3fe5
print(md5_encrypt_string("hello world"))  # 輸出：5eb63bbbe01eeed093cb22bb8f5acdc3

def md5_encrypt_file(file_path: str) -> str:
    """計算文件的MD5哈希值"""
    hasher = hashlib.md5()
    
    with open(file_path, 'rb') as f:
        while chunk := f.read(8192):  # 分塊讀取大文件
            hasher.update(chunk)
    
    return hasher.hexdigest()

# 示例：計算當(dāng)前腳本文件的哈希值
import __main__
print(md5_encrypt_file(__main__.__file__))

import os

def md5_encrypt_with_salt(input_str: str) -> (str, str):
    """帶隨機鹽值的MD5加密"""
    salt = os.urandom(16).hex()  # 生成16字節(jié)隨機鹽
    salted_input = salt.encode() + input_str.encode('utf-8')
    
    hasher = hashlib.md5()
    hasher.update(salted_input)
    
    return hasher.hexdigest(), salt

# 測試加鹽哈希
hashed, salt = md5_encrypt_with_salt("Password123")
print(f"鹽值：{salt}\n哈希值：{hashed}")

def multi_hash(input_str: str, iterations: int = 1000) -> str:
    hasher = hashlib.md5()
    hasher.update(input_str.encode())
    
    for _ in range(iterations):
        hasher.update(hasher.digest())
    
    return hasher.hexdigest()

import hmac

def hmac_md5(key: bytes, message: bytes) -> str:
    return hmac.new(key, message, hashlib.md5).hexdigest()

# 優(yōu)化大文件處理
def streaming_md5(file_path: str) -> str:
    hasher = hashlib.md5()
    
    with open(file_path, 'rb') as f:
        for chunk in iter(lambda: f.read(4096), b''):
            hasher.update(chunk)
    
    return hasher.hexdigest()