本文實例講述了python有證書的加密解密實現方法。分享給大家供大家參考。具體實現方法如下：
最近在做python的加解密工作，同時加完密的串能在php上能解出來，網上也找了一些靠譜的資料，剛好也有時間我就總結了一下python在加密與解密這塊的代碼，今后可能還能用的上。相對于php而言python這塊加解密組件較多的，分別是:
python-crypto - 這個組件是基本組件，使用的函式相對比較復雜。
ezPyCrypto - 相對簡單，但他作出來的公私鑰無法與其他程序相兼容???? SSLCrypto - 與 ezPyCrypto 是相同一個作者開發，效率上要比ezPyCrypto 好。但一樣不能與其它程序相兼容。
pyopenssl - 似乎是用在https 通訊上的，而我找不到加解密的用法。
M2Crypto - 終于讓我找到了，但它有一大缺點，它底層是用 SWIG 與 OpenSSL 交接的。
在Windows安裝SWIG 程序是非常難的。
我選擇使用的是M2Crypto，公鑰與私鑰證書生成有兩個方式，一種采用RSA生成，另一種是X509生成。我就把這兩種加解密代碼分享出來，供大家參考，但轉載或使用時請寫明出處。
一、 RSA標準方式生成的證書
1.加密解密、加密簽名、驗證加密簽名
復制代碼
代碼如下:
#encoding: utf8
import os
import M2Crypto
#隨機數生成器(1024位隨機)
M2Crypto.Rand.rand_seed(os.urandom(1024))
#生成一個1024位公鑰與私密鑰證書
Geekso = M2Crypto.RSA.gen_key(1024, 65537)
Geekso.save_key('jb51.net-private.pem', None)
Geekso.save_pub_key('jb51.net-public.pem')
#使用公鑰證書加密開始
WriteRSA = M2Crypto.RSA.load_pub_key('jb51.net-public.pem')
CipherText = WriteRSA.public_encrypt("這是一個秘密消息,只能用私鑰進行解密",M2Crypto.RSA.pkcs1_oaep_padding)
print "加密的串是:"
print CipherText.encode('base64')
#對加密串進行簽名
MsgDigest = M2Crypto.EVP.MessageDigest('sha1')
MsgDigest.update(CipherText)
#提示，這里也可以使用私鑰簽名
#WriteRSA = M2Crypto.RSA.load_key ('jb51.net-private.pem')
#Signature = WriteRSA.sign_rsassa_pss(MsgDigest.digest())
Signature = Geekso.sign_rsassa_pss(MsgDigest.digest())
print "簽名的串是:"
print Signature.encode('base64')
#使用私鑰證書解密開始
ReadRSA = M2Crypto.RSA.load_key ('jb51.net-private.pem')
try:
??? PlainText = ReadRSA.private_decrypt (CipherText, M2Crypto.RSA.pkcs1_oaep_padding)
except:
??? print "解密錯誤"
??? PlainText = ""
if PlainText :
?? print "解密出來的串是:"
?? print PlainText
?? # 驗證加密串的簽名
?? MsgDigest = M2Crypto.EVP.MessageDigest('sha1')
?? MsgDigest.update(CipherText)
?? #提示，如果是用私鑰簽名的那就用公鑰驗證
?? #VerifyRSA = M2Crypto.RSA.load_pub_key('Alice-public.pem')
?? #VerifyRSA.verify_rsassa_pss(MsgDigest.digest(), Signature)
?? if Geekso.verify_rsassa_pss(MsgDigest.digest(), Signature) == 1:
?????? print "簽名正確"
?? else:
?????? print "簽名不正確"
import os
import M2Crypto
#隨機數生成器(1024位隨機)
M2Crypto.Rand.rand_seed(os.urandom(1024))
#生成一個1024位公鑰與私密鑰證書
Geekso = M2Crypto.RSA.gen_key(1024, 65537)
Geekso.save_key('jb51.net-private.pem', None)
Geekso.save_pub_key('jb51.net-public.pem')
#使用公鑰證書加密開始
WriteRSA = M2Crypto.RSA.load_pub_key('jb51.net-public.pem')
CipherText = WriteRSA.public_encrypt("這是一個秘密消息,只能用私鑰進行解密",M2Crypto.RSA.pkcs1_oaep_padding)
print "加密的串是:"
print CipherText.encode('base64')
#對加密串進行簽名
MsgDigest = M2Crypto.EVP.MessageDigest('sha1')
MsgDigest.update(CipherText)
#提示，這里也可以使用私鑰簽名
#WriteRSA = M2Crypto.RSA.load_key ('jb51.net-private.pem')
#Signature = WriteRSA.sign_rsassa_pss(MsgDigest.digest())
Signature = Geekso.sign_rsassa_pss(MsgDigest.digest())
print "簽名的串是:"
print Signature.encode('base64')
#使用私鑰證書解密開始
ReadRSA = M2Crypto.RSA.load_key ('jb51.net-private.pem')
try:
??? PlainText = ReadRSA.private_decrypt (CipherText, M2Crypto.RSA.pkcs1_oaep_padding)
except:
??? print "解密錯誤"
??? PlainText = ""
if PlainText :
?? print "解密出來的串是:"
?? print PlainText
?? # 驗證加密串的簽名
?? MsgDigest = M2Crypto.EVP.MessageDigest('sha1')
?? MsgDigest.update(CipherText)
?? #提示，如果是用私鑰簽名的那就用公鑰驗證
?? #VerifyRSA = M2Crypto.RSA.load_pub_key('Alice-public.pem')
?? #VerifyRSA.verify_rsassa_pss(MsgDigest.digest(), Signature)
?? if Geekso.verify_rsassa_pss(MsgDigest.digest(), Signature) == 1:
?????? print "簽名正確"
?? else:
?????? print "簽名不正確"
2.字符串生成簽名、驗證簽名
復制代碼
代碼如下:
#用私鑰簽名
SignEVP = M2Crypto.EVP.load_key('jb51.net-private.pem')
SignEVP.sign_init()
SignEVP.sign_update('來自這一客(//www.jb51.net)的簽名串')
StringSignature = SignEVP.sign_final()
print "簽名串是:"
print StringSignature.encode('base64')
#用公鑰驗證簽名
PubKey = M2Crypto.RSA.load_pub_key('jb51.net-public.pem')
VerifyEVP = M2Crypto.EVP.PKey()
VerifyEVP.assign_rsa(PubKey)
VerifyEVP.verify_init()
VerifyEVP.verify_update('來自這一客(//www.jb51.net)的簽名串')
if VerifyEVP.verify_final(StringSignature) == 1:
??? print "字符串被成功驗證。"
else:
??? print "字符串驗證失敗!"
SignEVP = M2Crypto.EVP.load_key('jb51.net-private.pem')
SignEVP.sign_init()
SignEVP.sign_update('來自這一客(//www.jb51.net)的簽名串')
StringSignature = SignEVP.sign_final()
print "簽名串是:"
print StringSignature.encode('base64')
#用公鑰驗證簽名
PubKey = M2Crypto.RSA.load_pub_key('jb51.net-public.pem')
VerifyEVP = M2Crypto.EVP.PKey()
VerifyEVP.assign_rsa(PubKey)
VerifyEVP.verify_init()
VerifyEVP.verify_update('來自這一客(//www.jb51.net)的簽名串')
if VerifyEVP.verify_final(StringSignature) == 1:
??? print "字符串被成功驗證。"
else:
??? print "字符串驗證失敗!"
3.給證書加上密碼
給證書加密碼的好處是即使證書被人拿了，沒有密碼也用不了。
復制代碼
代碼如下:
def passphrase(v):
??? return '4567890'
??? return '4567890'
生成證書時用
復制代碼
代碼如下:
Geekso.save_key('jb51.net-private.pem',callback=passphrase)
使用證書時用
復制代碼
代碼如下:
ReadRSA = RSA.load_key ('jb51.net-private.pem', passphrase)
二、 X509標準方式生成的證書
1.生成證書、公鑰文件、私鑰文件
復制代碼
代碼如下:
import time
from M2Crypto import X509, EVP, RSA, ASN1
def issuer_name():
??? """
??? 證書發行人名稱(專有名稱)。
??? Parameters:
??????? none
??? Return:
??????? X509標準的發行人obj.
??? """
??? issuer = X509.X509_Name()
??? issuer.C = "CN"??????????????? # 國家名稱
??? issuer.CN = "*.jb51.net"?????? # 普通名字
??? issuer.ST = "Hunan Changsha"
??? issuer.L = "Hunan Changsha"
??? issuer.O = "Geekso Company Ltd"
??? issuer.OU = "Geekso Company Ltd"
??? issuer.Email = "123456@qq.com"
??? return issuer
def make_request(bits, cn):
??? """
??? 創建一個X509標準的請求。
??? Parameters:
??????? bits = 證書位數
??????? cn = 證書名稱
??? Return:
??????? 返回 X509 request 與 private key (EVP).
??? """
??? rsa = RSA.gen_key(bits, 65537, None)
??? pk = EVP.PKey()
??? pk.assign_rsa(rsa)
??? req = X509.Request()
??? req.set_pubkey(pk)
??? name = req.get_subject()
??? name.C = "US"
??? name.CN = cn
??? req.sign(pk,'sha256')
??? return req, pk
def make_certificate_valid_time(cert, days):
??? """
??? 從當前時間算起證書有效期幾天。
??? Parameters:
??????? cert = 證書obj
??????? days = 證書過期的天數
??? Return:
??????? none
??? """
??? t = long(time.time()) # 獲取當前時間
??? time_now = ASN1.ASN1_UTCTIME()
??? time_now.set_time(t)
??? time_exp = ASN1.ASN1_UTCTIME()
??? time_exp.set_time(t + days * 24 * 60 * 60)
??? cert.set_not_before(time_now)
??? cert.set_not_after(time_exp)
def make_certificate(bits):
??? """
??? 創建證書
??? Parameters:
??????? bits = 證快的位數
??? Return:
??????? 證書, 私鑰 key (EVP) 與 公鑰 key (EVP).
??? """
??? req, pk = make_request(bits, "localhost")
??? puk = req.get_pubkey()
??? cert = X509.X509()
??? cert.set_serial_number(1) # 證書的序例號
??? cert.set_version(1) # 證書的版本
??? cert.set_issuer(issuer_name()) # 發行人信息
??? cert.set_subject(issuer_name()) # 主題信息
??? cert.set_pubkey(puk)
??? make_certificate_valid_time(cert, 365) # 證書的過期時間
??? cert.sign(pk, 'sha256')
??? return cert, pk, puk
# 開始創建
cert, pk, puk= make_certificate(1024)
cert.save_pem('jb51.net-cret.pem')
pk.save_key('jb51.net-private.pem',cipher = None, callback = lambda: None)
puk.get_rsa().save_pub_key('jb51.net-public.pem')
from M2Crypto import X509, EVP, RSA, ASN1
def issuer_name():
??? """
??? 證書發行人名稱(專有名稱)。
??? Parameters:
??????? none
??? Return:
??????? X509標準的發行人obj.
??? """
??? issuer = X509.X509_Name()
??? issuer.C = "CN"??????????????? # 國家名稱
??? issuer.CN = "*.jb51.net"?????? # 普通名字
??? issuer.ST = "Hunan Changsha"
??? issuer.L = "Hunan Changsha"
??? issuer.O = "Geekso Company Ltd"
??? issuer.OU = "Geekso Company Ltd"
??? issuer.Email = "123456@qq.com"
??? return issuer
def make_request(bits, cn):
??? """
??? 創建一個X509標準的請求。
??? Parameters:
??????? bits = 證書位數
??????? cn = 證書名稱
??? Return:
??????? 返回 X509 request 與 private key (EVP).
??? """
??? rsa = RSA.gen_key(bits, 65537, None)
??? pk = EVP.PKey()
??? pk.assign_rsa(rsa)
??? req = X509.Request()
??? req.set_pubkey(pk)
??? name = req.get_subject()
??? name.C = "US"
??? name.CN = cn
??? req.sign(pk,'sha256')
??? return req, pk
def make_certificate_valid_time(cert, days):
??? """
??? 從當前時間算起證書有效期幾天。
??? Parameters:
??????? cert = 證書obj
??????? days = 證書過期的天數
??? Return:
??????? none
??? """
??? t = long(time.time()) # 獲取當前時間
??? time_now = ASN1.ASN1_UTCTIME()
??? time_now.set_time(t)
??? time_exp = ASN1.ASN1_UTCTIME()
??? time_exp.set_time(t + days * 24 * 60 * 60)
??? cert.set_not_before(time_now)
??? cert.set_not_after(time_exp)
def make_certificate(bits):
??? """
??? 創建證書
??? Parameters:
??????? bits = 證快的位數
??? Return:
??????? 證書, 私鑰 key (EVP) 與 公鑰 key (EVP).
??? """
??? req, pk = make_request(bits, "localhost")
??? puk = req.get_pubkey()
??? cert = X509.X509()
??? cert.set_serial_number(1) # 證書的序例號
??? cert.set_version(1) # 證書的版本
??? cert.set_issuer(issuer_name()) # 發行人信息
??? cert.set_subject(issuer_name()) # 主題信息
??? cert.set_pubkey(puk)
??? make_certificate_valid_time(cert, 365) # 證書的過期時間
??? cert.sign(pk, 'sha256')
??? return cert, pk, puk
# 開始創建
cert, pk, puk= make_certificate(1024)
cert.save_pem('jb51.net-cret.pem')
pk.save_key('jb51.net-private.pem',cipher = None, callback = lambda: None)
puk.get_rsa().save_pub_key('jb51.net-public.pem')
2.用證書加密、私鑰文件解密
復制代碼
代碼如下:
def geekso_encrypt_with_certificate(message, cert_loc):
??? """
??? cert證書加密，可以用私鑰文件解密.
??? Parameters:
??????? message = 要加密的串
??????? cert_loc = cert證書路徑
??? Return:
??????? 加密串 or 異常串
??? """
??? cert = X509.load_cert(cert_loc)
??? puk = cert.get_pubkey().get_rsa() # get RSA for encryption
??? message = base64.b64encode(message)
??? try:
??????? encrypted = puk.public_encrypt(message, RSA.pkcs1_padding)
??? except RSA.RSAError as e:
??????? return "ERROR encrypting " + e.message
??? return encrypted
encrypted = geekso_encrypt_with_certificate('www.jb51.net','jb51.net-cret.pem')
print '加密串',encrypted
def geekso_decrypt_with_private_key(message, pk_loc):
??? """
??? 私鑰解密證書生成的加密串
??? Parameters:
??????? message = 加密的串
??????? pk_loc = 私鑰路徑
??? Return:
??????? 解密串 or 異常串
??? """
??? pk = RSA.load_key(pk_loc) # load RSA for decryption
??? try:
??????? decrypted = pk.private_decrypt(message, RSA.pkcs1_padding)
??????? decrypted = base64.b64decode(decrypted)
??? except RSA.RSAError as e:
??????? return "ERROR decrypting " + e.message
??? return decrypted
print '解密串',geekso_decrypt_with_private_key(encrypted, 'jb51.net-private.pem')
??? """
??? cert證書加密，可以用私鑰文件解密.
??? Parameters:
??????? message = 要加密的串
??????? cert_loc = cert證書路徑
??? Return:
??????? 加密串 or 異常串
??? """
??? cert = X509.load_cert(cert_loc)
??? puk = cert.get_pubkey().get_rsa() # get RSA for encryption
??? message = base64.b64encode(message)
??? try:
??????? encrypted = puk.public_encrypt(message, RSA.pkcs1_padding)
??? except RSA.RSAError as e:
??????? return "ERROR encrypting " + e.message
??? return encrypted
encrypted = geekso_encrypt_with_certificate('www.jb51.net','jb51.net-cret.pem')
print '加密串',encrypted
def geekso_decrypt_with_private_key(message, pk_loc):
??? """
??? 私鑰解密證書生成的加密串
??? Parameters:
??????? message = 加密的串
??????? pk_loc = 私鑰路徑
??? Return:
??????? 解密串 or 異常串
??? """
??? pk = RSA.load_key(pk_loc) # load RSA for decryption
??? try:
??????? decrypted = pk.private_decrypt(message, RSA.pkcs1_padding)
??????? decrypted = base64.b64decode(decrypted)
??? except RSA.RSAError as e:
??????? return "ERROR decrypting " + e.message
??? return decrypted
print '解密串',geekso_decrypt_with_private_key(encrypted, 'jb51.net-private.pem')
3.用私鑰加密、證書解密
復制代碼
代碼如下:
def geekso_encrypt_with_private_key(message,pk_loc):
??? """
??? 私鑰加密
??? Parameters:
??????? message = 加密的串
??????? pk_loc = 私鑰路徑
??? Return:
??????? 加密串 or 異常串
??? """
??? ReadRSA = RSA.load_key(pk_loc);
??? message = base64.b64encode(message)
??? try:
??????? encrypted = ReadRSA.private_encrypt(message,RSA.pkcs1_padding)
??? except RSA.RSAError as e:
??????? return "ERROR encrypting " + e.message
??? return encrypted
encrypted = geekso_encrypt_with_private_key('www.jb51.net', 'jb51.net-private.pem')
print encrypted
def geekso_decrypt_with_certificate(message, cert_loc):
??? """
??? cert證書解密.
??? Parameters:
??????? message = 要解密的串
??????? cert_loc = cert證書路徑
??? Return:
??????? 解密后的串 or 異常串
??? """
??? cert = X509.load_cert(cert_loc)
??? puk = cert.get_pubkey().get_rsa()
??? try:
??????? decrypting = puk.public_decrypt(message, RSA.pkcs1_padding)
??????? decrypting = base64.b64decode(decrypting)
??? except RSA.RSAError as e:
??????? return "ERROR decrypting " + e.message
??? return decrypting
decrypting = geekso_decrypt_with_certificate(encrypted, 'jb51.net-cret.pem')
print decrypting
??? """
??? 私鑰加密
??? Parameters:
??????? message = 加密的串
??????? pk_loc = 私鑰路徑
??? Return:
??????? 加密串 or 異常串
??? """
??? ReadRSA = RSA.load_key(pk_loc);
??? message = base64.b64encode(message)
??? try:
??????? encrypted = ReadRSA.private_encrypt(message,RSA.pkcs1_padding)
??? except RSA.RSAError as e:
??????? return "ERROR encrypting " + e.message
??? return encrypted
encrypted = geekso_encrypt_with_private_key('www.jb51.net', 'jb51.net-private.pem')
print encrypted
def geekso_decrypt_with_certificate(message, cert_loc):
??? """
??? cert證書解密.
??? Parameters:
??????? message = 要解密的串
??????? cert_loc = cert證書路徑
??? Return:
??????? 解密后的串 or 異常串
??? """
??? cert = X509.load_cert(cert_loc)
??? puk = cert.get_pubkey().get_rsa()
??? try:
??????? decrypting = puk.public_decrypt(message, RSA.pkcs1_padding)
??????? decrypting = base64.b64decode(decrypting)
??? except RSA.RSAError as e:
??????? return "ERROR decrypting " + e.message
??? return decrypting
decrypting = geekso_decrypt_with_certificate(encrypted, 'jb51.net-cret.pem')
print decrypting
4.用私鑰簽名、證書驗證簽名
復制代碼
代碼如下:
def geekso_sign_with_private_key(message, pk_loc, base64 = True):
??? """
??? 私鑰簽名
??? Parameters:
??????? message = 待簽名的串
??????? pk_loc = 私鑰路徑
??????? base64 = True(bease64處理) False(16進制處理)
??? Return:
??????? 簽名后的串 or 異常串
??? """
??? pk = EVP.load_key(pk_loc)
??? pk.sign_init()
??? try:
??????? pk.sign_update(message)
??????? signature = pk.sign_final()
??? except EVP.EVPError as e:
??????? return "ERROR signature " + e.message
??? return signature.encode('base64') if base64 is True else signature.encode('hex')
signature = geekso_sign_with_private_key('www.jb51.net','jb51.net-private.pem')
print signature
def geekso_verifysign_with_certificate(message, signature, cert_loc, base64 = True):
??? """
??? 證書驗證簽名
??? Parameters:
??????? message = 原來簽名的串
??????? signature = 簽名后的串
??????? cert_loc = 證書路徑文件
??????? base64 = True(bease64處理) False(16進制處理)
??? Return:
??????? 成功or失敗串 or 異常串
??? """
??? signature = signature.decode('base64') if base64 is True else signature.decode('hex')
??? cert = X509.load_cert(cert_loc)
??? puk = cert.get_pubkey().get_rsa()
??? try:
??????? verifyEVP = EVP.PKey()
??????? verifyEVP.assign_rsa(puk)
??????? verifyEVP.verify_init()
??????? verifyEVP.verify_update(message)
??????? verifysign = verifyEVP.verify_final(signature)
??????? if verifysign == 1 :
??????????? return '成功'
??????? else :
??????????? return '失敗'
??? except EVP.EVPError as e:
??????? return "ERROR Verify Sign " + e.message
???
print geekso_verifysign_with_certificate('www.jb51.net', signature, 'jb51.net-cret.pem')
??? """
??? 私鑰簽名
??? Parameters:
??????? message = 待簽名的串
??????? pk_loc = 私鑰路徑
??????? base64 = True(bease64處理) False(16進制處理)
??? Return:
??????? 簽名后的串 or 異常串
??? """
??? pk = EVP.load_key(pk_loc)
??? pk.sign_init()
??? try:
??????? pk.sign_update(message)
??????? signature = pk.sign_final()
??? except EVP.EVPError as e:
??????? return "ERROR signature " + e.message
??? return signature.encode('base64') if base64 is True else signature.encode('hex')
signature = geekso_sign_with_private_key('www.jb51.net','jb51.net-private.pem')
print signature
def geekso_verifysign_with_certificate(message, signature, cert_loc, base64 = True):
??? """
??? 證書驗證簽名
??? Parameters:
??????? message = 原來簽名的串
??????? signature = 簽名后的串
??????? cert_loc = 證書路徑文件
??????? base64 = True(bease64處理) False(16進制處理)
??? Return:
??????? 成功or失敗串 or 異常串
??? """
??? signature = signature.decode('base64') if base64 is True else signature.decode('hex')
??? cert = X509.load_cert(cert_loc)
??? puk = cert.get_pubkey().get_rsa()
??? try:
??????? verifyEVP = EVP.PKey()
??????? verifyEVP.assign_rsa(puk)
??????? verifyEVP.verify_init()
??????? verifyEVP.verify_update(message)
??????? verifysign = verifyEVP.verify_final(signature)
??????? if verifysign == 1 :
??????????? return '成功'
??????? else :
??????????? return '失敗'
??? except EVP.EVPError as e:
??????? return "ERROR Verify Sign " + e.message
???
print geekso_verifysign_with_certificate('www.jb51.net', signature, 'jb51.net-cret.pem')
希望本文所述對大家的Python程序設計有所幫助。
更多文章、技術交流、商務合作、聯系博主
微信掃碼或搜索：z360901061
微信掃一掃加我為好友
QQ號聯系： 360901061
您的支持是博主寫作最大的動力，如果您喜歡我的文章，感覺我的文章對您有幫助，請用微信掃描下面二維碼支持博主2元、5元、10元、20元等您想捐的金額吧，狠狠點擊下面給點支持吧，站長非常感激您！手機微信長按不能支付解決辦法：請將微信支付二維碼保存到相冊，切換到微信，然后點擊微信右上角掃一掃功能，選擇支付二維碼完成支付。
【本文對您有幫助就好】元
