python密碼學(xué)RSA密碼加密教程

第python密碼學(xué)RSA密碼加密教程目錄加密算法模塊哈希值初始化函數(shù)algorithm加密程序的完整代碼在本章中，我們將重點(diǎn)介紹RSA密碼加密的不同實(shí)現(xiàn)及其所涉及的功能.您可以引用或包含此python文件以實(shí)現(xiàn)RSA密碼算法實(shí)現(xiàn).

加密算法模塊

加密算法包含的模塊如下

from

Crypto.PublicKey

import

RSA

from

Crypto.Cipher

import

PKCS1_OAEP

from

Crypto.Signature

import

PKCS1_v1_5

from

Crypto.Hash

import

SHA512,

SHA384,

SHA256,

SHA,

MD5

from

Crypto

import

Random

from

base64

import

b64encode,

b64decode

hash

=

"SHA-256"

哈希值初始化

為了更好的安全性，我們將哈希值初始化為SHA-256.我們將使用函數(shù)生成新密鑰或一對(duì)公鑰和私鑰.

使用以下代碼.

def

newkeys(keysize):

random_generator

=

Random.new().read

key

=

RSA.generate(keysize,

random_generator)

private,

public

=

key,

key.publickey()

return

public,

private

def

importKey(externKey):

return

RSA.importKey(externKey)

函數(shù)algorithm

對(duì)于加密，在RSA之后使用以下函數(shù)algorithm:

def

encrypt(message,

pub_key):

cipher

=

PKCS1_OAEP.new(pub_key)

return

cipher.encrypt(message)

兩個(gè)參數(shù)是必需的:消息和pub_key，它指的是公鑰.公鑰用于加密，私鑰用于解密.

加密程序的完整代碼

from

Crypto.PublicKey

import

RSA

from

Crypto.Cipher

import

PKCS1_OAEP

from

Crypto.Signature

import

PKCS1_v1_5

from

Crypto.Hash

import

SHA512,

SHA384,

SHA256,

SHA,

MD5

from

Crypto

import

Random

from

base64

import

b64encode,

b64decode

hash

=

"SHA-256"

def

newkeys(keysize):

random_generator

=

Random.new().read

key

=

RSA.generate(keysize,

random_generator)

private,

public

=

key,

key.publickey()

return

public,

private

def

importKey(externKey):

return

RSA.importKey(externKey)

def

getpublickey(priv_key):

return

priv_key.publickey()

def

encrypt(message,

pub_key):

cipher

=

PKCS1_OAEP.new(pub_key)

return

ciph