我正在开发一个使用 Crypto++ 使用 RSA 加密一些数据的项目。
这是我的 Crypto++ 代码:
string plain = "Text123", encoded, cipher;
string pkey = "...";
StringSource ss1(pkey, true);
RSA::PublicKey publicKey;
PEM_Load(ss, publicKey);
RSAES_OAEP_SHA_Encryptor e(publicKey);
StringSource ss2(plain, true,
new PK_EncryptorFilter(prng, e,
new StringSink(cipher)
)
);
StringSource ss3(cipher, true,
new Base64Encoder(
new StringSink(encoded)
)
);
cout << encoded;
我正在尝试用 Python 解密加密的消息。这是我的 Python 代码:
from Crypto.PublicKey import RSA
from base64 import b64decode
cipher_text = "[THE OUTPUT OF C++]"
rsakey = RSA.importKey(open("private.txt", "r").read())
raw_cipher_data = b64decode(cipher_text)
decrypted = rsakey.decrypt(raw_cipher_data)
但我得到了不可读的字符。
为什么我得到不可读的字符?谁能帮我这个?
提前致谢。
最佳答案
这是一个完整的工作示例,用于在 C++ 中加密明文并在 Python 中对其进行解密:
先决条件
加密
你的 C++ 做正确的事。为了完整起见,我使用必要的 header 包含和公钥的反序列化扩展了您的代码:
#include <cryptopp/base64.h>
#include <cryptopp/files.h>
#include <cryptopp/filters.h>
#include <cryptopp/osrng.h>
#include <cryptopp/pem.h>
#include <cryptopp/rng.h>
#include <cryptopp/rsa.h>
#include <iostream>
int main(int argc, char **argv) {
CryptoPP::AutoSeededRandomPool prng{};
std::string plain{"Text123"};
/**
* Read public key in PEM format.
*/
CryptoPP::FileSource fs{"public.pem", /*pumpAll=*/true};
CryptoPP::RSA::PublicKey publicKey{};
PEM_Load(fs, publicKey);
std::string encrypted{};
/**
* Pump plain text through RSA encryption scheme with OAEP/SHA1 padding.
*
* In general, manual memory allocations should be avoided. However,
* the CryptoPP API expects us to allocate memory for each transformer and
* then pass the pointer to the next transformer, which then takes ownership
* of the pointer and will free it. This design obviously predates
* modern C++ smart pointers, which should be preferred when possible.
*/
CryptoPP::RSAES_OAEP_SHA_Encryptor cipher{publicKey};
auto *encoder{
new CryptoPP::Base64Encoder{new CryptoPP::StringSink{encrypted}}};
auto *encryptor{new CryptoPP::PK_EncryptorFilter{prng, cipher, encoder}};
CryptoPP::StringSource ss{plain, /*pumpAll=*/true, encryptor};
std::cout << encrypted;
return 0;
}
解密在您的 Python 代码中,您没有指定填充方案。由于您的 C++ 代码使用 OAEP/SHA1 填充,您还必须在 Python 代码中指定此填充方案:
from base64 import b64decode
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_OAEP
from Crypto.Hash import SHA1
rsa_key = None
encrypted = None
with open("key.pem", "r") as f:
rsa_key = RSA.importKey(f.read())
with open("encrypted", "r") as f:
encrypted = b64decode(f.read())
cipher = PKCS1_OAEP.new(rsa_key, hashAlgo=SHA1)
decrypted = cipher.decrypt(encrypted)
print(decrypted)
关于python - 使用 Crypto++ 加密并使用 Python.CRYPTO 解密,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41700910/