Python 相当于来自 RSA 密钥 Java 代码的密码加密

Question

下面是使用 rsa 私钥的 Java 代码(例如：MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvBXTe278Lwg2MoI7iGKolSYuF+sNFKrsZplxCN9x0kItU3KIf8+1q60ILLwLewCEf7foxzpWp32j9YYU9vNBghuJ7BHcDYTffTRcv+QdNno491j701Hq7DIw13AGCQQTRcnfclvblnytIEWoQsiUvPJcdiWgqJIX3IQGA47a+uwIDAQAB(

并使用 RSA 公钥(从上面的 RSA 私钥生成的公钥(加密纯字符串test123

byte[] array = javax.xml.bind.DatatypeConverter.parseBase64Binary(key); KeyFactorykf = KeyFactory.getInstance(“RSA”);
publicKey = kf.generatePublic(new X509EncodedKeySpec(array)); Cipher = Cipher.getInstance(“RSA”);
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
byte[] result = cipher.doFinal (“test123”.getBytes(“UTF-8”));
String output = javax.xml.bind.DatatypeConverter.printBase64Binary(result);

我尝试了 m2crypto 库在 python 中这样做：

import base64
from M2Crypto import BIO, RSA
pubkey = 'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvBXTe278Lwg2MoI7iGKolSYuF+sNFKrsZplxCN9x0kItU3KIf8+1q60ILLwLewCEf7foxzpWp32j9YYU9vNBghuJ7BHcDYTffTRcv+QdNno491j701Hq7DIw13AGCQQTRcnfclvblnytIEWoQsiUvPJcdiWgqJIX3IQGA47a+uwIDAQAB'
# encryption
text = "test123".encode('utf-8')  # Plaintext
pub_bio = BIO.MemoryBuffer(pubkey.encode('utf-8'))  # Public key string
pub_rsa = RSA.load_pub_key_bio(pub_bio)  # Load public key
secret = pub_rsa.public_encrypt(text, RSA.pkcs1_padding)  # Public key encryption
sign = base64.b64encode(secret)  # Ciphertext base64 encoding
print(sign)

我得到的错误是：

Traceback (most recent call last):
File "encrypt_rsa_public_key.py", line 13, in <module>
pub_rsa = RSA.load_pub_key_bio(pub_bio)  # Load public key
File "/Users/umeshpathak/env/py3env/lib/python3.7/site-packages/M2Crypto/RSA.py", line 444, in load_pub_key_bio
rsa_error()
File "/Users/umeshpathak/env/py3env/lib/python3.7/site-packages/M2Crypto/RSA.py", line 333, in rsa_error
raise RSAError(Err.get_error_message())
M2Crypto.RSA.RSAError: no start line

我该如何解决这个问题？

Answer 1

您正在使用的库可能希望获取 PEM 格式的公钥，即包含在-----BEGIN PUBLIC KEY-----和-----END PUBLIC KEY-----之间。因此，您必须将pubkey更改为：

pubkey = '-----BEGIN PUBLIC KEY-----n' 
'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvBXTe278Lwg2MoI7iGKolSYuF+sNFKrsZplxCN9x0kItU3KIf8+1q60ILLwLewCEf7foxzpWp32j9YYU9vNBghuJ7BHcDYTffTRcv+QdNno491j701Hq7DIw13AGCQQTRcnfclvblnytIEWoQsiUvPJcdiWgqJIX3IQGA47a+uwIDAQAB' 
'n-----END PUBLIC KEY-----'

换行符很重要。