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45 lines
1.7 KiB
45 lines
1.7 KiB
from Crypto.Cipher import DES
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import binascii
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from Crypto.Cipher import PKCS1_OAEP
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from Crypto.PublicKey import RSA
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.asymmetric import padding
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from cryptography.hazmat.primitives import serialization
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from cryptography.hazmat.backends import default_backend
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def verify():
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# 读取解密后的消息内容
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with open('inbox/decrypted_msg.txt', 'rb') as decrypted_file:
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message = decrypted_file.read() # 以二进制方式读取消息
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# 从 PEM 文件中加载公钥
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with open('public_key_sender.pem', 'rb') as f: # 以二进制模式打开
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public_key = serialization.load_pem_public_key(f.read(), backend=default_backend())
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# 读取十六进制格式的签名
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with open('sent/signature.txt', 'r') as signature_file:
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hex_signature = signature_file.read().strip() # 读取并去掉两端的空白字符
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# 将十六进制签名转换为字节数据
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signature = bytes.fromhex(hex_signature)
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# 计算消息的哈希（应与签名时一致）
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message_hash = hashes.Hash(hashes.SHA256(), backend=default_backend())
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message_hash.update(message)
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digest = message_hash.finalize()
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try:
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# 使用公钥对签名进行验证
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public_key.verify(
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signature,
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digest, # 使用哈希值进行验证
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padding.PSS(
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mgf=padding.MGF1(hashes.SHA256()),
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salt_length=padding.PSS.MAX_LENGTH
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),
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hashes.SHA256()
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)
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print("Signature verified successfully.")
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return True # 验证成功
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except Exception as e:
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print(f"Verification failed: {e}")
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return False # 验证失败 |