Python hashlib库数据安全加密必备指南

import hashlib
data = "Hello, World!"
# 计算MD5哈希值
md5_hash = hashlib.md5(data.encode()).hexdigest()
# 计算SHA-1哈希值
sha1_hash = hashlib.sha1(data.encode()).hexdigest()
# 计算SHA-256哈希值
sha256_hash = hashlib.sha256(data.encode()).hexdigest()
print("MD5 Hash:", md5_hash)
print("SHA-1 Hash:", sha1_hash)
print("SHA-256 Hash:", sha256_hash)

import hashlib

data = b"Hello, World!"

# 创建SHA-256哈希对象
sha256 = hashlib.sha256()
sha256.update(data)

# 生成SHA-256哈希摘要
hash_digest = sha256.digest()

print("SHA-256 Digest:", hash_digest)

import hashlib
def hash_password(password):
    # 添加盐值（salt）以增加密码安全性
    salted_password = password + "somesalt"
    hashed_password = hashlib.sha256(salted_password.encode()).hexdigest()
    return hashed_password
# 假设用户输入的密码
user_password = "mypassword123"
# 存储密码的哈希值
stored_password = hash_password(user_password)
# 验证密码
def verify_password(entered_password, stored_password):
    return stored_password == hash_password(entered_password)
# 验证密码是否匹配
print(verify_password("mypassword123", stored_password))  # 输出True

import hashlib

def hash_file(file_path):
    sha256 = hashlib.sha256()
    with open(file_path, 'rb') as file:
        while chunk := file.read(4096):
            sha256.update(chunk)
    return sha256.hexdigest()

# 获取文件的哈希值
file_hash = hash_file('file_to_check.txt')
print("File Hash:", file_hash)

import hashlib
# 下载文件后计算哈希值
def calculate_file_hash(downloaded_file):
    sha256 = hashlib.sha256()
    with open(downloaded_file, 'rb') as file:
        while chunk := file.read(4096):
            sha256.update(chunk)
    return sha256.hexdigest()
# 下载文件
# ...
# 从服务器获取文件的哈希值
expected_hash = "7c112e41182cc09ed8a100dd9ed09f77bdf7246d5d69a96bfe7336cfc88e1a29"
# 对下载的文件进行哈希验证
downloaded_file = "downloaded_file.txt"
downloaded_file_hash = calculate_file_hash(downloaded_file)
if downloaded_file_hash == expected_hash:
    print("文件完整，未被篡改")
else:
    print("文件可能已被篡改")

import hashlib
import secrets
def hash_password(password):
    salt = secrets.token_hex(8)
    salted_password = password + salt
    hashed_password = hashlib.sha256(salted_password.encode()).hexdigest()
    return (hashed_password, salt)
# 存储用户密码
user_password = "mysecurepassword123"
hashed_password, salt = hash_password(user_password)
# 将哈希密码和盐值存储在数据库中
# ...
# 验证用户密码
def verify_password(entered_password, stored_password, stored_salt):
    salted_password = entered_password + stored_salt
    hashed_entered_password = hashlib.sha256(salted_password.encode()).hexdigest()
    return hashed_entered_password == stored_password
# 验证密码是否匹配
print(verify_password("mysecurepassword123", hashed_password, salt))  # 输出True

import hashlib
import secrets
def hash_password(password):
    salt = secrets.token_hex(8)  # 生成盐值
    salted_password = password + salt
    hashed_password = hashlib.sha256(salted_password.encode()).hexdigest()
    return (hashed_password, salt)
# 存储哈希密码和盐值
user_password = "mysecurepassword123"
hashed_password, salt = hash_password(user_password)

import hashlib
data = "Hello, World!"
# 使用不同的哈希算法
md5_hash = hashlib.md5(data.encode()).hexdigest()
sha256_hash = hashlib.sha256(data.encode()).hexdigest()
print("MD5 Hash:", md5_hash)
print("SHA-256 Hash:", sha256_hash)