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我正在尝试使用 CryptoPP 实现curve25519 验证。我首先尝试了libsignal图书馆,女巫显示了正确的结果。然后我用 CryptoPP 尝试了相同的数据,但显示错误的结果。

这是libsignal用于验证签名的代码:

string pub = str2hex("0504f05568cc7a16fa9b4bc1c9d9294a80b7727e349365f855031a180bf0f80910");
ec_public_key* pub_key;
curve_decode_point(&pub_key, (uint8_t*)pub.data(), pub.size(), 0);

string message = str2hex("05f1fd491d63f1860bdaf3f9b0eb46c2494b7f184a32d9e6c859a421ad284f4307");
string signature = str2hex("5e525df3360ea62281efe8fb9e183521105bb3d9ba8ad43be9fac9d87dd216a6ea9e64099f6f05fbcd6e5a39ab239aad8c1e03d27a1378e4bcbf8937eac4300a");

int ret = curve_verify_signature(
    pub_key, 
    (uint8_t*)message.data(), message.size(), 
    (uint8_t*)signature.data(), signature.size()
    );

cout << "ret: " << ret << endl; // shows 1 (correct)

结果为 1,表示正确。请注意libsignal要求pub_key以字节 0x05(key-type)开头,CryptoPP此处不适用。

使用的代码CryptoPP

string pub = str2hex("04f05568cc7a16fa9b4bc1c9d9294a80b7727e349365f855031a180bf0f80910");

string message = str2hex("05f1fd491d63f1860bdaf3f9b0eb46c2494b7f184a32d9e6c859a421ad284f4307");
string signature = str2hex("5e525df3360ea62281efe8fb9e183521105bb3d9ba8ad43be9fac9d87dd216a6ea9e64099f6f05fbcd6e5a39ab239aad8c1e03d27a1378e4bcbf8937eac4300a");

ed25519::Verifier verifier((uint8_t*)pub.data());
bool ret = verifier.VerifyMessage(
    (uint8_t*)message.data(), message.size(), 
    (uint8_t*)signature.data(), signature.size()
    );
cout << "ret: " << ret << endl; // shows 0 (wrong)

它显示0,代码有什么问题?

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