Hi Jeff,
Many thanks. Enclosed is the whole codes.
//General paramters
int Network_Nodes =100; //This parameter is the total number of nodes in
the network. This is used to create public and private key pairs.
int Block_Size=10; // The size of blocks in the bc
int BC_lenght=0; // This indicates the lenghtes of the BC, i.e.
the total number of blocks added to the BC.
int Fin_BC_size =20; //This indicates the final size of the BC.
std::vector<CryptoPP::RSA::PrivateKey> prk;
std::vector<CryptoPP::RSA::PublicKey> pk;
std::vector<std::string> prev_t; //this keeps the ID of the
previous trnasaction for each node.
struct Block {
std::string block_hash;
std::string block_num;
struct transactions {
std::string TransactionID;
std::string previousTransactionID;
std::string PK;
std::string Sign;
};
std::vector<transactions> trans;
};
std::vector<Block> BC;
//////////////////////////////////////////These are included for salsa
using CryptoPP::Salsa20;
using CryptoPP::AutoSeededRandomPool;
using std::cout;
using std::endl;
using std::string;
//////////////////////////////////////////End of encludes for Salsa
int generatekey()
{
for (int i=0;i<Network_Nodes;i++)
{
CryptoPP::AutoSeededRandomPool rng;
CryptoPP::InvertibleRSAFunction param;
param.GenerateRandomWithKeySize(rng,1536);
CryptoPP::RSA::PrivateKey privatekey(param);
CryptoPP::RSA::PublicKey publickey (param);
prk.push_back(privatekey);
pk.push_back(publickey);
}
return 0;
}
///////////////////////////////////////////////////////////////
void initialization()
{
for (int i=0;i<=Fin_BC_size;i++)
{
prev_t.push_back("NULL");
}
}
/////////////////////////////////////////////////////////////////
void populate_bc ()
{
int stored_trans_in_block=0; // the total number of transactions which
are stored in a single block. temporary to decide on whether to change the
block-number or not.
int node=0; //indicates which node we are currently using to fill
the BC.
std::string block_content,trans_cont; //collects all data in
the block, used for calcluating the hash of the block.
std::string pkstring; //the string of the PK
std::string signature;
std::string mes ="Used for signature";
Block::transactions tra;
// First we need to push empty classes for both BC and transactions
thus we can fill it later.
BC.push_back(Block());
BC[BC_lenght].trans.push_back(Block::transactions());
if (prev_t[node]=="NULL")
{
// BC[BC_lenght].trans[stored_trans_in_block].previousTransactionID
=="NULL";
pk[node].BEREncode(CryptoPP::StringSink(pkstring).Ref());
BC[BC_lenght].trans[stored_trans_in_block].PK=pkstring;
// CryptoPP::RSASS<CryptoPP::PSS, CryptoPP::SHA1>::Signer
signer(prk[2]);
CryptoPP::AutoSeededRandomPool rng;
CryptoPP::RSASSA_PKCS1v15_SHA_Signer signer(prk[node]);
CryptoPP::StringSource ss1(mes, true,
new CryptoPP::SignerFilter(rng, signer,
new CryptoPP::
StringSink(signature)
) // SignerFilter
); // StringSource
/* CryptoPP::StringSource ss1(mes, true,
new CryptoPP::SignerFilter(rng, signer,
new CryptoPP::HexEncoder(
new CryptoPP::StringSink(signature))));*/
// BC[BC_lenght].trans[stored_trans_in_block].Sign=signature;
}
pk[2].BEREncode(CryptoPP::StringSink(pkstring).Ref());
tra.PK = pkstring;
tra.previousTransactionID= " ";
tra.Sign=" ";
tra.TransactionID=" ";
BC[0].trans.push_back(tra);
}
int main(int argc, const char * argv[]) {
//1) create "Netwrok_Nodes" number of key pair sets
generatekey();
//2) initilaization
initialization();
//3) create blockchain with the above nodes.
populate_bc();
}
On Friday, August 11, 2017 at 12:23:08 PM UTC+10, Jeffrey Walton wrote:
>
>
> I installed crypto++ on my mac and try to run a simple code on xcode. I
>> can create keys using the following:
>>
>> CryptoPP::AutoSeededRandomPool rng;
>>
>> CryptoPP::InvertibleRSAFunction param;
>>
>> param.GenerateRandomWithKeySize(rng,1536);
>>
>> CryptoPP::RSA::PrivateKey privatekey(param);
>>
>> CryptoPP::RSA::PublicKey publickey (param);
>>
>> prk.push_back(privatekey);
>>
>> pk.push_back(publickey);
>>
>
> The push_back's look unusual. Do something else.
>
> If you show the code that calls the snippet above, we might be able to
> suggest something.
>
> But when I try to sign a message it goes to threat. I do not know what to
>> do with it. The exact threat message is:
>>
>> Thread 1: EXC_BAD_ACCESS
>>
>>
>> I am using the following code to sign:
>>
>> CryptoPP::StringSource ss1(mes, true,
>>
>> new CryptoPP::SignerFilter(rng, signer,
>>
>> new CryptoPP::StringSink(signature)
>>
>> ) // SignerFilter
>>
>> ); // StringSource
>>
>
> This looks OK.
>
> There's also some RSA examples on the wiki at
> https://www.cryptopp.com/wiki/RSA_Cryptography.
>
> Jeff
>
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