python密碼學(xué)RSA密碼解密教程

更新時(shí)間：2022年05月24日 14:35:44 作者：菜鳥教程

這篇文章主要為大家介紹了python密碼學(xué)RSA密碼解密教程，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進(jìn)步，早日升職加薪

授權(quán)

授權(quán)是確認(rèn)發(fā)件人是唯一發(fā)送郵件的人的過程.以下代碼解釋了這個(gè) :

def?sign(message,?priv_key,?hashAlg="SHA-256"):
???global?hash
???hash?=?hashAlg
???signer?=?PKCS1_v1_5.new(priv_key)
???
???if?(hash?==?"SHA-512"):
??????digest?=?SHA512.new()
???elif?(hash?==?"SHA-384"):
??????digest?=?SHA384.new()
???elif?(hash?==?"SHA-256"):
??????digest?=?SHA256.new()
???elif?(hash?==?"SHA-1"):
??????digest?=?SHA.new()
???else:
??????digest?=?MD5.new()
???digest.update(message)
???return?signer.sign(digest)

身份驗(yàn)證

身份驗(yàn)證可以通過驗(yàn)證方法解釋，如下所示去;

def?verify(message,?signature,?pub_key):
???signer?=?PKCS1_v1_5.new(pub_key)
???if?(hash?==?"SHA-512"):
??????digest?=?SHA512.new()
???elif?(hash?==?"SHA-384"):
??????digest?=?SHA384.new()
???elif?(hash?==?"SHA-256"):
??????digest?=?SHA256.new()
???elif?(hash?==?"SHA-1"):
??????digest?=?SHA.new()
???else:
??????digest?=?MD5.new()
???digest.update(message)
???return?signer.verify(digest,?signature)

驗(yàn)證數(shù)字簽名以及發(fā)件人和收件人的詳細(xì)信息.為安全起見，這會(huì)增加更多的權(quán)重年齡.

RSA密碼解密

您可以使用以下代碼進(jìn)行RSA密碼解密 :

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?cipher.encrypt(message)
def?decrypt(ciphertext,?priv_key):
???cipher?=?PKCS1_OAEP.new(priv_key)
???return?cipher.decrypt(ciphertext)
def?sign(message,?priv_key,?hashAlg?=?"SHA-256"):
???global?hash
???hash?=?hashAlg
???signer?=?PKCS1_v1_5.new(priv_key)
???
???if?(hash?==?"SHA-512"):
??????digest?=?SHA512.new()
???elif?(hash?==?"SHA-384"):
??????digest?=?SHA384.new()
???elif?(hash?==?"SHA-256"):
??????digest?=?SHA256.new()
???elif?(hash?==?"SHA-1"):
??????digest?=?SHA.new()
???else:
??????digest?=?MD5.new()
???digest.update(message)
???return?signer.sign(digest)
def?verify(message,?signature,?pub_key):
???signer?=?PKCS1_v1_5.new(pub_key)
???if?(hash?==?"SHA-512"):
??????digest?=?SHA512.new()
???elif?(hash?==?"SHA-384"):
??????digest?=?SHA384.new()
???elif?(hash?==?"SHA-256"):
??????digest?=?SHA256.new()
???elif?(hash?==?"SHA-1"):
??????digest?=?SHA.new()
???else:
??????digest?=?MD5.new()
???digest.update(message)
???return?signer.verify(digest,?signature)

以上就是python密碼學(xué)RSA密碼解密教程的詳細(xì)內(nèi)容，更多關(guān)于python密碼學(xué)RSA解密的資料請(qǐng)關(guān)注腳本之家其它相關(guān)文章！

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