crypto.proto

// TODO(Someone): copyright

syntax = "proto3";

package crypto;

enum Type {
	UNKNOWN = 0;
	P256 = 1;
}

// DO NOT modify its field directly, object of this class is immutable
message PublicKey256 {
  bytes data = 1;  // 256 bits long
}

// DO NOT modify its field directly, object of this class is immutable
message PrivateKey {
  Type type = 1;
  bytes data = 2;  // for ecdsa, this is the random number k
}

// DO NOT modify its field directly, object of this class is immutable
//
// TODO: signature compression
// Note for ECDSA compression:
// 1. secp256k1 implementation: https://github.com/ethereum/go-ethereum/tree/develop/crypto/secp256k1
// 2. <x, y> can be stored as <x, first_bit_of_y>
// 3. if h == 1 (e.g. secp256k1), r == s. For more about how to recover <x, y> from <r, s>, read http://www.secg.org/sec1-v2.pdf, page 47-48
message Signature {
  Type type = 1;
  bytes data = 2;  // for ecdsa, this is <r, s, x, y> (for now).
}

// DO NOT modify its field directly, object of this class is immutable
message Digest256 {
  bytes data = 1;
}

message Digests256 {
  repeated Digest256 digests = 1;
}