privkey.py
from cryptography.hazmat.primitives.asymmetric import rsa, paddingfrom cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.asymmetric import utils
from cryptography.hazmat.backends import default_backend
# 生成一个RSA私钥
private_key = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
backend=default_backend()
)
# 打印私钥的PEM格式（一种常见的私钥格式）
pem = private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=serialization.NoEncryption()
).decode('utf-8')
print("Private Key (PEM):")
print(pem)
# 使用私钥进行签名
message = b"This is a secret message"
signature = private_key.sign(
message,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
# 打印签名
print("\nSignature:")
print(signature.hex())
# 假设你已经有了对应的公钥，你可以使用公钥来验证签名
public_key = private_key.public_key()
pem_public = public_key.public_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo
).decode('utf-8')
print("\nPublic Key (PEM):")
print(pem_public)
# 验证签名
try:
public_key.verify(
signature,
message,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
print("\nSignature verification succeeded.")
except Exception as e:
print(f"\nSignature verification failed: {e}")
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