package crypto.proto.BGV;

// proto messages for key switch hints and secret keys from SymmBGV

import "Lol.proto";

// run this: hprotoc -I ../lol BGV.proto

message SecretKey {
  required crypto.proto.lol.R sk              = 1; // ring element
  required double v                           = 2; // scaled variance
}

// internally used in KSHint
message RqPolynomial {
  repeated crypto.proto.lol.RqProduct coeffs  = 1; // constant coefficient first, then linear, etc.
}

// linear or quadratic key switch hint
message KSHint {
  repeated RqPolynomial hint                  = 1;
  required crypto.proto.lol.TypeRep gad       = 2; // gadget used for key switching
}

// information for a single ring switch
message TunnelHint {
  required crypto.proto.lol.LinearRq func     = 1; // linear function to apply
  repeated KSHint hint                        = 2;
  required uint32 e                           = 3; // index of greatest common subring of r and s
  required uint32 r                           = 4; // input ring index
  required uint32 s                           = 5; // output ring index
  required uint64 p                           = 6; // plaintext modulus
}