This is what you want:
ECDSA<ECP, SHA256>::Verifier verifier(public_key);
//signer.AccessKey().Initialize(prng, ASN1::secp160r1());
string signature(signer.MaxSignatureLength(), 0);
On Mon, Mar 26, 2018 at 1:29 PM, <[email protected]> wrote:
> Hello
> I'm having trouble verifying an ECDSA signature following instructions in
> the wiki, the following program prints FAIL and I cannot figure out why:
>
> #include <cryptopp/eccrypto.h>
> #include <cryptopp/oids.h>
> #include <cryptopp/osrng.h>
> #include <iostream>
> using namespace std;
> using namespace CryptoPP;
> int main() {
> AutoSeededRandomPool prng;
> ECDSA<ECP, SHA256>::PrivateKey private_key;
> ECDSA<ECP, SHA256>::PublicKey public_key;
> private_key.Initialize( prng, ASN1::secp160r1() );
> private_key.MakePublicKey(public_key);
> ECDSA<ECP, SHA256>::Signer signer(private_key);
> ECDSA<ECP, SHA256>::Verifier verifier(public_key);
> signer.AccessKey().Initialize(prng, ASN1::secp160r1());
> string signature(signer.MaxSignatureLength(), 0);
> string message = "asdf";
> auto signature_length = signer.SignMessage(
> prng, (const byte*)message.data(),
> message.size(), (byte*)signature.data());
> signature.resize(signature_length);
> bool verified = verifier.VerifyMessage(
> (const byte*)message.data(), message.size(),
> (const byte*)signature.data(), signature.size());
> if (verified)
> cout << "PASS" << endl;
> else
> cout << "FAIL" << endl;
> }
>
> Isn't this how it's supposed to work? Thanks!
> Ilja
>
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--
Regards,
Mouse
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