//Generate Signing Keys
//This function is called by each participant in
//A ring multisignature transaction.
//The participant will send the returned parameters
//to whomever is managing the transaction.
//returns a, aG, aHP and I
tuple<key, key, key, key> InitiateRMS(key x) {
key I = scalarmultKey(hashToPoint(scalarmultBase(x)), x);
key a, aG;
skpkGen(a, aG);
key aHP = scalarmultKey(hashToPoint(scalarmultBase(x)), a);
return make_tuple(a, aG, aHP, I);
}
key commit(xmr_amount amount, key mask) {
mask = scalarmultBase(mask);
key am = d2h(amount);
key bH = scalarmultH(am);
addKeys(mask, mask, bH);
return mask;
}
key commit(xmr_amount amount, const key &mask) {
key c = scalarmultBase(mask);
key am = d2h(amount);
key bH = scalarmultH(am);
addKeys(c, c, bH);
return c;
}
key zeroCommit(xmr_amount amount) {
key mask = identity();
mask = scalarmultBase(mask);
key am = d2h(amount);
key bH = scalarmultH(am);
addKeys(mask, mask, bH);
return mask;
}
//addKeys1
//aGB = aG + B where a is a scalar, G is the basepoint, and B is a point
void addKeys1(key &aGB, const key &a, const key & B) {
key aG = scalarmultBase(a);
addKeys(aGB, aG, B);
}
//generates a random secret and corresponding public key
tuple<key, key> skpkGen() {
key sk = skGen();
key pk = scalarmultBase(sk);
return make_tuple(sk, pk);
}
//generates a random secret and corresponding public key
void skpkGen(key &sk, key &pk) {
skGen(sk);
scalarmultBase(pk, sk);
}
//generates a random curve point (for testing)
key pkGen() {
key sk = skGen();
key pk = scalarmultBase(sk);
return pk;
}
