如何将私钥和公钥存储到python的rsa模块生成的pem文件中

我在 python 中使用以下模块进行rsa加密。
https://github.com/sybrenstuvel/python-rsa
可以通过pip安装，如下pip3 install rsa

我已经阅读了在此处使用此模块的信息：https : //github.com/sybrenstuvel/python-rsa/blob/master/doc/usage.rst

我能够生成公钥和私钥，还能够使用以下代码使用公钥加密消息

import rsa
pubKey, priKey = rsa.newkeys(1024)
print("Public key: ",pubKey)
print("Private key: ",priKey)

msg = "vinay kumar shukla".encode('utf8')
print("Message without encryption:",msg)

msgEnc = rsa.encrypt(msg, pubKey)
print("encrypted message:",msgEnc)

但我想将私钥存储到某个文件中，正如您可以在该模块的使用文件中读取的那样，他们提供了从.pem文件中读取密钥的方法，因此这意味着我也应该将密钥存储在pem文件中，但我是不知道如何将这个模块生成的密钥存储到文件中。

当我打印此模块生成的私钥时，它给了我以下输出

PrivateKey(8647494628885176696347621451257950700244697066080136004727560667550523829374958314554596272099668415472356485265099323795859891239567212729331504592847959, 65537, 80620400968137738399200401402545247384675983145016755403642821122013062179228267902734675759971390409853232911734749752372599473758015795215587460952985, 6068766834338315918835399238932380729501892761840591316766866213831546939444337723, 1424917922362067845458877023625137340152906787710542109910805914692739733)

如果我创建一个文件key.pem并将此密钥存储到文件中，则存储此密钥。文件的内容是

-----BEGIN RSA PRIVATE KEY-----
PrivateKey(8647494628885176696347621451257950700244697066080136004727560667550523829374958314554596272099668415472356485265099323795859891239567212729331504592847959, 65537, 80620400968137738399200401402545247384675983145016755403642821122013062179228267902734675759971390409853232911734749752372599473758015795215587460952985, 6068766834338315918835399238932380729501892761840591316766866213831546939444337723, 1424917922362067845458877023625137340152906787710542109910805914692739733)
-----END RSA PRIVATE KEY-----

当我尝试阅读它时，它给了我错误，例如padding error etc请告诉我如何存储这些密钥，然后将其读取以进行解密。

回答

import rsa

# Use at least 2048 bit keys nowadays, see e.g. https://www.keylength.com/en/4/
publicKey, privateKey = rsa.newkeys(2048) 

# Export public key in PKCS#1 format, PEM encoded 
publicKeyPkcs1PEM = publicKey.save_pkcs1().decode('utf8') 
print(publicKeyPkcs1PEM)
# Export private key in PKCS#1 format, PEM encoded 
privateKeyPkcs1PEM = privateKey.save_pkcs1().decode('utf8') 
print(privateKeyPkcs1PEM)

# Save and load the PEM encoded keys as you like

# Import public key in PKCS#1 format, PEM encoded 
publicKeyReloaded = rsa.PublicKey.load_pkcs1(publicKeyPkcs1PEM.encode('utf8')) 
# Import private key in PKCS#1 format, PEM encoded 
privateKeyReloaded = rsa.PrivateKey.load_pkcs1(privateKeyPkcs1PEM.encode('utf8')) 

plaintext = "vinay kumar shukla".encode('utf8')
print("Plaintext: ", plaintext)

ciphertext = rsa.encrypt(plaintext, publicKeyReloaded)
print("Ciphertext: ", ciphertext)
 
decryptedMessage = rsa.decrypt(ciphertext, privateKeyReloaded)
print("Decrypted message: ", decryptedMessage)