path: root/test/bls_test.cpp

#include <bls.hpp>
#include <cybozu/test.hpp>
#include <iostream>
#include <sstream>

template<class T>
void streamTest(const T& t)
{
    std::ostringstream oss;
    oss << t;
    std::istringstream iss(oss.str());
    T t2;
    iss >> t2;
    CYBOZU_TEST_EQUAL(t, t2);
}
CYBOZU_TEST_AUTO(bls)
{
    bls::init();
    bls::PrivateKey prv;
    prv.init();
    streamTest(prv);
    bls::PublicKey pub;
    prv.getPublicKey(pub);
    streamTest(pub);
    for (int i = 0; i < 5; i++) {
        std::string m = "hello";
        m += char('0' + i);
        bls::Sign s;
        prv.sign(s, m);
        CYBOZU_TEST_ASSERT(s.verify(pub, m));
        CYBOZU_TEST_ASSERT(!s.verify(pub, m + "a"));
        streamTest(s);
    }
}

CYBOZU_TEST_AUTO(k_of_n)
{
    const std::string m = "abc";
    const int n = 5;
    const int k = 3;
    bls::PrivateKey prv0;
    prv0.init();
    bls::Sign s0;
    prv0.sign(s0, m);
    bls::PublicKey pub0;
    prv0.getPublicKey(pub0);
    CYBOZU_TEST_ASSERT(s0.verify(pub0, m));

    bls::MasterPrivateKey msk;
    prv0.getMasterPrivateKey(msk, k);

    std::vector<bls::PrivateKey> allPrvVec(n);
    for (int i = 0; i < n; i++) {
        int id = i + 1;
        allPrvVec[i].set(msk, id);
    }
    CYBOZU_TEST_EQUAL(allPrvVec.size(), n);
    for (int i = 0; i < n; i++) {
        CYBOZU_TEST_EQUAL(allPrvVec[i].getId(), i + 1);
    }

    std::vector<bls::Sign> allSignVec(n);
    for (int i = 0; i < n; i++) {
        CYBOZU_TEST_ASSERT(allPrvVec[i] != prv0);
        allPrvVec[i].sign(allSignVec[i], m);
        bls::PublicKey pub;
        allPrvVec[i].getPublicKey(pub);
        CYBOZU_TEST_ASSERT(pub != pub0);
        CYBOZU_TEST_ASSERT(allSignVec[i].verify(pub, m));
    }

    /*
        3-out-of-n
        can recover
    */
    std::vector<bls::PrivateKey> prvVec(3);
    for (int a = 0; a < n; a++) {
        prvVec[0] = allPrvVec[a];
        for (int b = a + 1; b < n; b++) {
            prvVec[1] = allPrvVec[b];
            for (int c = b + 1; c < n; c++) {
                prvVec[2] = allPrvVec[c];
                bls::PrivateKey prv;
                prv.recover(prvVec);
                CYBOZU_TEST_EQUAL(prv, prv0);
            }
        }
    }
    {
        prvVec[0] = allPrvVec[0];
        prvVec[1] = allPrvVec[1];
        prvVec[2] = allPrvVec[0]; // same of prvVec[0]
        bls::PrivateKey prv;
        CYBOZU_TEST_EXCEPTION_MESSAGE(prv.recover(prvVec), std::exception, "same id");
    }
    {
        /*
            n-out-of-n
            can recover
        */
        bls::PrivateKey prv;
        prv.recover(allPrvVec);
        CYBOZU_TEST_EQUAL(prv, prv0);
    }
    /*
        2-out-of-n
        can't recover
    */
    prvVec.resize(2);
    for (int a = 0; a < n; a++) {
        prvVec[0] = allPrvVec[a];
        for (int b = a + 1; b < n; b++) {
            prvVec[1] = allPrvVec[b];
            bls::PrivateKey prv;
            prv.recover(prvVec);
            CYBOZU_TEST_ASSERT(prv != prv0);
        }
    }
    /*
        3-out-of-n
        can recover
    */
    std::vector<bls::Sign> signVec(3);
    for (int a = 0; a < n; a++) {
        signVec[0] = allSignVec[a];
        for (int b = a + 1; b < n; b++) {
            signVec[1] = allSignVec[b];
            for (int c = b + 1; c < n; c++) {
                signVec[2] = allSignVec[c];
                bls::Sign s;
                s.recover(signVec);
                CYBOZU_TEST_EQUAL(s, s0);
            }
        }
    }
    {
        /*
            n-out-of-n
            can recover
        */
        bls::Sign s;
        s.recover(allSignVec);
        CYBOZU_TEST_EQUAL(s, s0);
    }
    /*
        2-out-of-n
        can't recover
    */
    signVec.resize(2);
    for (int a = 0; a < n; a++) {
        signVec[0] = allSignVec[a];
        for (int b = a + 1; b < n; b++) {
            signVec[1] = allSignVec[b];
            bls::Sign s;
            s.recover(signVec);
            CYBOZU_TEST_ASSERT(s != s0);
        }
    }
    // share and recover publicKey
    {
        std::vector<bls::PublicKey> pubVec(k);
        // select [0, k) publicKey
        for (int i = 0; i < k; i++) {
            allPrvVec[i].getPublicKey(pubVec[i]);
        }
        bls::PublicKey pub;
        pub.recover(pubVec);
        CYBOZU_TEST_EQUAL(pub, pub0);
    }
}

CYBOZU_TEST_AUTO(MasterPrivateKey)
{
    const int k = 3;
    const int n = 6;
    bls::PrivateKey prv0;
    prv0.init();
    bls::PublicKey pub0;
    prv0.getPublicKey(pub0);
    bls::MasterPrivateKey msk;
    prv0.getMasterPrivateKey(msk, k);

    bls::MasterPublicKey mpk;
    bls::getMasterPublicKey(mpk, msk);

    const int idTbl[n] = {
        3, 5, 193, 22, 15
    };
    bls::PrivateKeyVec prvVec(n);
    bls::PublicKeyVec pubVec(n);
    for (int i = 0; i < n; i++) {
        int id = idTbl[i];
        prvVec[i].set(msk, id);
        prvVec[i].getPublicKey(pubVec[i]);
        bls::PublicKey pub;
        pub.set(mpk, id);
        CYBOZU_TEST_EQUAL(pubVec[i], pub);
    }
}

CYBOZU_TEST_AUTO(add)
{
    bls::PrivateKey prv1, prv2;
    prv1.init();
    prv2.init();
    CYBOZU_TEST_ASSERT(prv1 != prv2);

    bls::PublicKey pub1, pub2;
    prv1.getPublicKey(pub1);
    prv2.getPublicKey(pub2);

    const std::string m = "doremi";
    bls::Sign s1, s2;
    prv1.sign(s1, m);
    prv2.sign(s2, m);
    CYBOZU_TEST_ASSERT((s1 + s2).verify(pub1 + pub2, m));
}