Python的hashlib提供了常见的摘要算法

Python的hashlib提供了常见的摘要算法,如MD5,SHA1等等

计算出一个字符串的MD5值:

import hashlib
md5 = hashlib.md5()
md5.update('how to use md5 in python hashlib?'.encode("utf8"))  #需要指定转码 否则报错 update()必须指定要加密的字符串的字符编码
print( md5.hexdigest())#返回十六进制
print( md5.digest()) #二进制


# 如果数据量很大,可以分块多次调用update(),最后计算的结果是一样的:
md5 = hashlib.md5()
md5.update('how to use md5 in '.encode("utf8"))
md5.update('python hashlib?'.encode("utf8"))
print( md5.hexdigest())#返回十六进制

上述结果:

d26a53750bc40b38b65a520292f69306
b'\xd2jSu\x0b\xc4\x0b8\xb6ZR\x02\x92\xf6\x93\x06'
d26a53750bc40b38b65a520292f69306

 

计算出一个字符串SHA1值:

import hashlib
sha_1 = hashlib.sha1()
sha_1.update('how to use sha1 in '.encode("utf8"))    #需要指定转码 否则报错 update()必须指定要加密的字符串的字符编码
sha_1.update('python hashlib?'.encode("utf8"))
print (sha_1.hexdigest())

# 如果数据量很大,可以分块多次调用update(),最后计算的结果是一样的:
sha2 = hashlib.sha1()
sha2.update('how to use sha1 in python hashlib?'.encode("utf8"))
print (sha2.hexdigest())

打印结果:

2c76b57293ce30acef38d98f6046927161b46a44
2c76b57293ce30acef38d98f6046927161b46a44

 

读取文件获取MD5值:

import os
import hashlib
#文件md5
def file_md5(pathandname):
    if os.path.isfile(pathandname):
        hashmd5 = hashlib.md5()
        file = open(pathandname, 'rb')
        while True:
            b = file.read(1024)
            if not b:
                break
            hashmd5.update(b)
        file.close()
        return hashmd5.hexdigest()
    else:
        return None

print(file_md5("C:\\Users\\Administrator\\Desktop\\V2.6.1_B511\\hvr_dec"))     #aef87d1d673ca52412b4a950a06b9557

 

读取文件base64

import base64
import os
# base64,参数为文件路径名
def file_base64(filepath):
    if os.path.isfile(filepath):
        with open(filepath, 'rb') as file:
            file_base64_str = base64.b64encode(file.read())
        return file_base64_str
    else:
        return None

 

读取sha256

import hmac
import hashlib


def get_hmacsha256(key, message):
    key_bytes = bytes(key, 'utf-8')
    message_bytes = bytes(message, 'utf-8')
    hmacsha256_str = hmac.new(key_bytes, message_bytes, digestmod=hashlib.sha256).hexdigest()
    return hmacsha256_str
posted @ 2020-01-11 11:52  lucky8492  阅读(346)  评论(0编辑  收藏  举报