92 lines
3.1 KiB
Python
92 lines
3.1 KiB
Python
import base64
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives import serialization, hashes
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from cryptography.hazmat.primitives.asymmetric import rsa, padding
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class RSAUtils:
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@staticmethod
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def generate_rsa_key_pair() -> (str, str):
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"""
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生成RSA密钥对并返回Base64编码的公钥和私钥（DER格式）
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:return: Tuple containing Base64 encoded public key and private key
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"""
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# 生成RSA密钥对
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private_key = rsa.generate_private_key(
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public_exponent=65537,
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key_size=2048,
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)
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public_key = private_key.public_key()
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# 导出私钥为DER格式
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private_key_der = private_key.private_bytes(
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encoding=serialization.Encoding.DER,
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format=serialization.PrivateFormat.PKCS8,
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encryption_algorithm=serialization.NoEncryption()
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)
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# 导出公钥为DER格式
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public_key_der = public_key.public_bytes(
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encoding=serialization.Encoding.DER,
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format=serialization.PublicFormat.SubjectPublicKeyInfo
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)
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# 将DER格式的密钥编码为Base64
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private_key_b64 = base64.b64encode(private_key_der).decode('utf-8')
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public_key_b64 = base64.b64encode(public_key_der).decode('utf-8')
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return private_key_b64, public_key_b64
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@staticmethod
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def verify_rsa_keys(private_key: str, public_key: str) -> bool:
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"""
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使用 RSA 验证公钥和私钥是否匹配
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:param private_key: 私钥字符串 (Base64 编码，无标识符)
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:param public_key: 公钥字符串 (Base64 编码，无标识符)
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:return: 如果匹配则返回 True，否则返回 False
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"""
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if not private_key or not public_key:
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return False
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try:
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# 解码 Base64 编码的公钥和私钥
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public_key_bytes = base64.b64decode(public_key)
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private_key_bytes = base64.b64decode(private_key)
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# 加载公钥
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public_key = serialization.load_der_public_key(public_key_bytes, backend=default_backend())
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# 加载私钥
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private_key = serialization.load_der_private_key(private_key_bytes, password=None,
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backend=default_backend())
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# 测试加解密
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message = b'test'
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encrypted_message = public_key.encrypt(
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message,
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padding.OAEP(
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mgf=padding.MGF1(algorithm=hashes.SHA256()),
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algorithm=hashes.SHA256(),
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label=None
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)
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)
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decrypted_message = private_key.decrypt(
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encrypted_message,
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padding.OAEP(
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mgf=padding.MGF1(algorithm=hashes.SHA256()),
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algorithm=hashes.SHA256(),
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label=None
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)
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)
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return message == decrypted_message
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except Exception as e:
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print(f"RSA 密钥验证失败: {e}")
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return False
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