Python进行MD5加密的实现全流程

import hashlib

def md5_encrypt_string(input_str: str) -> str:
    """对字符串进行MD5加密"""
    # 将字符串编码为字节序列
    input_bytes = input_str.encode('utf-8')
    
    # 创建MD5哈希对象
    hasher = hashlib.md5()
    hasher.update(input_bytes)
    
    # 返回十六进制格式哈希值
    return hasher.hexdigest()

# 测试用例
print(md5_encrypt_string("Hello World"))  # 输出：b10a8db164e0754105b7a99be72e3fe5
print(md5_encrypt_string("hello world"))  # 输出：5eb63bbbe01eeed093cb22bb8f5acdc3

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

# 示例：计算当前脚本文件的哈希值
import __main__
print(md5_encrypt_file(__main__.__file__))

import os

def md5_encrypt_with_salt(input_str: str) -> (str, str):
    """带随机盐值的MD5加密"""
    salt = os.urandom(16).hex()  # 生成16字节随机盐
    salted_input = salt.encode() + input_str.encode('utf-8')
    
    hasher = hashlib.md5()
    hasher.update(salted_input)
    
    return hasher.hexdigest(), salt

# 测试加盐哈希
hashed, salt = md5_encrypt_with_salt("Password123")
print(f"盐值：{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()

# 优化大文件处理
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()