如何从PEM文件加载RSA密钥并在python-crypto中使用它

pip install cryptography

from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.backends import default_backend

# 将此路径替换为您的PEM文件的路径
pem_file_path = "path/to/your/pem/file.pem"

# 加载私钥
with open(pem_file_path, "rb") as key_file:
    private_key = serialization.load_pem_private_key(
        key_file.read(),
        password=None,
        backend=default_backend()
    )

# 加载公钥
with open(pem_file_path, "rb") as key_file:
    public_key = serialization.load_pem_public_key(
        key_file.read(),
        backend=default_backend()
    )

# 使用私钥加密
plaintext = b"Hello, world!"
ciphertext = private_key.encrypt(
    plaintext,
    padding.OAEP(
        mgf=padding.MGF1(algorithm=hashes.SHA256()),
        algorithm=hashes.SHA256(),
        label=None
    )
)

# 使用公钥解密
plaintext = public_key.decrypt(
    ciphertext,
    padding.OAEP(
        mgf=padding.MGF1(algorithm=hashes.SHA256()),
        algorithm=hashes.SHA256(),
        label=None
    )
)

print(plaintext)