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 =how to use md5 in ")) md5.update(python hashlib?)) 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:
hashlib sha_1 = hashlib.sha1() sha_1.update(how to use sha1 in ")) 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(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?print (sha2.hexdigest())
打印结果:
2c76b57293ce30acef38d98f6046927161b46a44
2c76b57293ce30acef38d98f6046927161b46a44
读取文件获取MD5值:
os 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: None print(file_md5(C:\\Users\\Administrator\\Desktop\\V2.6.1_B511\\hvr_dec")) aef87d1d673ca52412b4a950a06b9557
读取文件base64
base64 base64,参数为文件路径名 file_base64(filepath): os.path.isfile(filepath): with open(filepath,) as file: file_base64_str = base64.b64encode(file.read()) file_base64_str return None
读取sha256
hmac hashlib get_hmacsha256(key,message): key_bytes = bytes(key,1)">utf-8) message_bytes = bytes(message,1)">) hmacsha256_str = hmac.new(key_bytes,message_bytes,digestmod=hashlib.sha256).hexdigest() return hmacsha256_str