Introduction to the encryption of the Hashlib module

For cryptographic related operations, the 3.x replaces the MD5 module and the SHA module, mainly providing SHA1, SHA224, SHA256, SHA384, SHA512, MD5 algorithm

Import HASHLIBM = Hashlib.md5 () m.update (b "Hello") print (M.hexdigest ()) m.update (b "It ' s Me") print (M.hexdigest ()) M.update (b "It ' s been a long time since we spoken.") Print (M.hexdigest ()) m2 = Hashlib.md5 () m2.update (b "Helloit ' s Me") print (M2.hexdigest ()) # Output 5d41402abc4b2a76b9719d911017c59264f69d95135bc13d4827f871b37f780f0c9a83e10aa2f9e9629be61146db9cc264f69d95135bc13d4827f87 1b37f780f# the second and fourth MD5 values are the same, so the second one is encrypted Helloit ' SME

　　print(m.digest()) #2进制格式hash

　　print ( len (m.hexdigest())) #16进制格式hash

# ######## SHA1 ######## hash = HASHLIB.SHA1 () hash.update (' admin ') print (Hash.hexdigest ()) # ######## sha256 ######## Hash = hashlib.sha256 () hash.update (' admin ') print (Hash.hexdigest ())  # ######## sha384 ######## hash = hashlib.sha384 () Hash.update (' admin ') print (Hash.hexdigest ()) # ######## sha512 ######## hash = hashlib.sha512 () hash.update (' admin ') Print (Hash.hexdigest ())

Python also has an HMAC module that internally creates keys and content for us to process and then encrypt

Hash message authentication code, or HMAC, is an authentication mechanism based on the message identification Code (authentication code) of Mac. When using HMAC, both sides of the message communication authenticate the authenticity of the message by verifying the authentication key K added in the message;

Generally used in network communication message encryption, the premise is that both parties must first agree on a good key, like a connector password, and then send the message with key to encrypt the message, the receiver with key + message plaintext again encrypted, take the encrypted value with the sender's relative ratio is equal, so that the authenticity of the message can be verified, And the legitimacy of the sender.

import Hmach = Hmac.new ("King of the Land Tiger". Encode (encoding= "Utf-8"), "You are a little squirrel". Encode ( encoding= "Utf-8") print (H.digest ()) print (H.hexdigest ()) #输出b ' fx\xad\xdd\x9e\xd6\xddcqn\x82c\xcd\xd9\ x80-' 6678addd9ed6dd63514e8263cdd9802d