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/*
Copyright (C) 2019-Present SKALE Labs
This file is part of sgxwallet.
sgxwallet is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
sgxwallet is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with sgxwallet. If not, see <https://www.gnu.org/licenses/>.
@file ECDSACrypto.cpp
@author Stan Kladko
@date 2019
*/
#include "ECDSACrypto.h"
#include "BLSCrypto.h"
#include "sgxwallet.h"
#include "RPCException.h"
#include <iostream>
#include <gmp.h>
#include <random>
static std::default_random_engine rand_gen((unsigned int) time(0));
std::string concatPubKeyWith0x(char* pub_key_x, char* pub_key_y){
std::string px = pub_key_x;
std::string py = pub_key_y;
std::string result = "0x" + px + py;// + std::to_string(pub_key_x) + std::to_string(pub_key_y);
return result;
}
std::vector<std::string> gen_ecdsa_key(){
char *errMsg = (char *)calloc(1024, 1);
int err_status = 0;
uint8_t* encr_pr_key = (uint8_t *)calloc(1024, 1);
char *pub_key_x = (char *)calloc(1024, 1);
char *pub_key_y = (char *)calloc(1024, 1);
uint32_t enc_len = 0;
status = generate_ecdsa_key(eid, &err_status, errMsg, encr_pr_key, &enc_len, pub_key_x, pub_key_y );
if ( err_status != 0 ){
std::cerr << "RPCException thrown" << std::endl;
throw RPCException(-666, errMsg) ;
}
std::vector<std::string> keys(3);
std::cerr << "account key is " << errMsg << std::endl;
char *hexEncrKey = (char *) calloc(2*BUF_LEN, 1);
carray2Hex(encr_pr_key, enc_len, hexEncrKey);
keys.at(0) = hexEncrKey;
keys.at(1) = std::string(pub_key_x) + std::string(pub_key_y);//concatPubKeyWith0x(pub_key_x, pub_key_y);//
//std::cerr << "in ECDSACrypto encr key x " << keys.at(0) << std::endl;
//std::cerr << "in ECDSACrypto encr_len %d " << enc_len << std::endl;
unsigned long seed = rand_gen();
std::cerr << "seed is " << seed << std::endl;
gmp_randstate_t state;
gmp_randinit_default(state);
gmp_randseed_ui(state, seed);
mpz_t rand32;
mpz_init(rand32);
mpz_urandomb(rand32, state, 256);
char arr[mpz_sizeinbase (rand32, 16) + 2];
char * rand_str = mpz_get_str(arr, 16, rand32);
keys.at(2) = rand_str;
std::cerr << "rand_str length is " << strlen(rand_str) << std::endl;
gmp_randclear(state);
mpz_clear(rand32);
free(errMsg);
free(pub_key_x);
free(pub_key_y);
free(encr_pr_key);
free(hexEncrKey);
return keys;
}
std::string get_ecdsa_pubkey(const char* encryptedKeyHex){
char *errMsg = (char *)calloc(1024, 1);
int err_status = 0;
char *pub_key_x = (char *)calloc(1024, 1);
char *pub_key_y = (char *)calloc(1024, 1);
uint64_t enc_len = 0;
uint8_t encr_pr_key[BUF_LEN];
if (!hex2carray(encryptedKeyHex, &enc_len, encr_pr_key)){
throw RPCException(INVALID_HEX, "Invalid encryptedKeyHex");
}
status = get_public_ecdsa_key(eid, &err_status, errMsg, encr_pr_key, enc_len, pub_key_x, pub_key_y );
if ( err_status != 0){
throw RPCException(-666, errMsg) ;
}
std::string pubKey = std::string(pub_key_x) + std::string(pub_key_y);//concatPubKeyWith0x(pub_key_x, pub_key_y);//
std:: cerr << "pubkey is " << pubKey << std::endl;
std:: cerr << "pubkey length is " << pubKey.length() << std::endl;
std::cerr << "err str " << errMsg << std::endl;
free(errMsg);
free(pub_key_x);
free(pub_key_y);
return pubKey;
}
std::vector<std::string> ecdsa_sign_hash(const char* encryptedKeyHex, const char* hashHex, int base){
std::vector<std::string> signature_vect(3);
char *errMsg = (char *)calloc(1024, 1);
int err_status = 0;
char* signature_r = (char*)malloc(1024);
char* signature_s = (char*)malloc(1024);
uint8_t signature_v = 0;
uint64_t dec_len = 0;
uint8_t encr_key[BUF_LEN];
if (!hex2carray(encryptedKeyHex, &dec_len, encr_key)){
throw RPCException(INVALID_HEX, "Invalid encryptedKeyHex");
}
std::cerr << "encryptedKeyHex: "<< encryptedKeyHex << std::endl;
std::cerr << "HASH: "<< hashHex << std::endl;
std::cerr << "encrypted len" << dec_len << std::endl;
status = ecdsa_sign1(eid, &err_status, errMsg, encr_key, ECDSA_ENCR_LEN, (unsigned char*)hashHex, signature_r, signature_s, &signature_v, base );
if ( err_status != 0){
throw RPCException(-666, errMsg ) ;
}
std::cerr << "signature r in ecdsa_sign_hash "<< signature_r << std::endl;
std::cerr << "signature s in ecdsa_sign_hash "<< signature_s << std::endl;
if ( status != SGX_SUCCESS){
std::cerr << "failed to sign " << std::endl;
}
signature_vect.at(0) = std::to_string(signature_v);
if ( base == 16) {
signature_vect.at(1) = "0x" + std::string(signature_r);
signature_vect.at(2) = "0x" + std::string(signature_s);
}
else{
signature_vect.at(1) = std::string(signature_r);
signature_vect.at(2) = std::string(signature_s);
}
free(errMsg);
free(signature_r);
free(signature_s);
return signature_vect;
}