Python中的RSA加密无法在Java中解密

发布于 2025-01-19 03:10:09 字数 1440 浏览 3 评论 0原文

我使用私钥在 python 中进行 RSA 加密，并且无法使用公钥在 Java 中解密。下面是Python/Java源代码和异常。我尝试了 PKCS1_OAEP 和哈希算法的多种组合，但得到了相同的错误。

同时，在同一平台内加密/解密工作正常（例如，使用公钥在 Java 或 Python 中加密并使用私钥解密，反之亦然，使用私钥在 Java 或 Python 中加密并使用公钥解密）

Java版本=1.8， Python 版本 = 3.10

Python

import base64
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5

KEY = "-----BEGIN RSA PRIVATE KEY-----\n" \
      "MII...WI=" \
      "\n-----END RSA PRIVATE KEY-----"

#import private key
priv_key = RSA.import_key(KEY)
rsa_cipher = PKCS1_v1_5.new(priv_key)
#encode text
enc_text = rsa_cipher.encrypt("Hello Stackoverflow".encode('utf-8'))
enc_text_64 = base64.b64encode(cipher_text).decode("utf-8")
print(enc_text_64)

Java

PublicKey pubKey = CertificateFactory.getInstance("X.509").generateCertificate(new ByteArrayInputStream(decodeBase64(PUBLIC_KEY))).getPublicKey();

Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", new BouncyCastleProvider());
cipher.init(Cipher.DECRYPT_MODE, pubKey);        
String res = new String(cipher.doFinal(Base64.getMimeDecoder().decode(str)), "utf-8");

Java 中的异常

org.bouncycastle.jcajce.provider.util.BadBlockException: unable to decrypt block
Caused by: org.bouncycastle.crypto.InvalidCipherTextException: block incorrect

原文

I make RSA encryption in python with private key and cannot decrypt in Java with public key. Below is Python/Java source codes and exception.
I tried multiple combinations with PKCS1_OAEP and hash algorythms but getting the same error.

At the same time encription / decription within the same platform works fine (e.g. encrypt in Java or Python with public key and decrypt with private and vice versa encrypt in Java or Python with private key and decrypt with public)

Java version = 1.8,
Python version = 3.10

Python

import base64
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5

KEY = "-----BEGIN RSA PRIVATE KEY-----\n" \
      "MII...WI=" \
      "\n-----END RSA PRIVATE KEY-----"

#import private key
priv_key = RSA.import_key(KEY)
rsa_cipher = PKCS1_v1_5.new(priv_key)
#encode text
enc_text = rsa_cipher.encrypt("Hello Stackoverflow".encode('utf-8'))
enc_text_64 = base64.b64encode(cipher_text).decode("utf-8")
print(enc_text_64)

Java

PublicKey pubKey = CertificateFactory.getInstance("X.509").generateCertificate(new ByteArrayInputStream(decodeBase64(PUBLIC_KEY))).getPublicKey();

Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", new BouncyCastleProvider());
cipher.init(Cipher.DECRYPT_MODE, pubKey);        
String res = new String(cipher.doFinal(Base64.getMimeDecoder().decode(str)), "utf-8");

Exception in Java

org.bouncycastle.jcajce.provider.util.BadBlockException: unable to decrypt block
Caused by: org.bouncycastle.crypto.InvalidCipherTextException: block incorrect

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