Python Module Learning Note--hashlib

Hashlib is a security hash and message digest that provides a number of different cryptographic algorithm interfaces, such as SHA1, SHA224, SHA256, SHA384, SHA512, MD5, and so on.

Common Properties

hashlib.algorithms
List all encryption algorithms

h.digest_size
The size of the resulting hash byte.

h.block_size
The size of the hash inner block

Common Methods

hash.new([arg])
Creates a hash object that specifies the encryption mode

hash.update(arg)
Updates a hash object with a string parameter. If the same hash object calls the method repeatedly, M.update (a); M.update (b) equivalent to M.update (A+B)

hash.digest()
Returns the digest as a binary data string value.

hash.hexdigest()
Returns a summary, as a hexadecimal data string value

hash.copy()
Copy

Code Instance

import hashlibmd5 = hashlib.md5() md5.update("I am Sin_Geek")  print md5.digest()  printprint‘block_size:‘, md5.block_sizeprint‘digest_size:‘, md5.digest_size

import hashlibprint‘-‘25‘更简洁版本‘‘-‘25print hashlib.new("md5""I am Sin_Geek").hexdigest()

"I am Sin_Geek"print hashlib.md5(a).hexdigest()print hashlib.sha1(a).hexdigest()print hashlib.sha224(a).hexdigest()print hashlib.sha256(a).hexdigest()print hashlib.sha384(a).hexdigest()print hashlib.sha512(a).hexdigest()

Python Module Learning Note--hashlib