void SecretShareFile(int threshold, int nShares, const char *filename, const char *seed)
{
assert(nShares<=1000);
RandomPool rng;
rng.IncorporateEntropy((byte *)seed, strlen(seed));
ChannelSwitch *channelSwitch;
FileSource source(filename, false, new SecretSharing(rng, threshold, nShares, channelSwitch = new ChannelSwitch));
vector_member_ptrs<FileSink> fileSinks(nShares);
string channel;
for (int i=0; i<nShares; i++)
{
char extension[5] = ".000";
extension[1]='0'+byte(i/100);
extension[2]='0'+byte((i/10)%10);
extension[3]='0'+byte(i%10);
fileSinks[i].reset(new FileSink((string(filename)+extension).c_str()));
channel = WordToString<word32>(i);
fileSinks[i]->Put((byte *)channel.data(), 4);
channelSwitch->AddRoute(channel, *fileSinks[i], DEFAULT_CHANNEL);
}
source.PumpAll();
}
string RSAEncryptString(const char *pubFilename, const char *seed, const char *message)
{
FileSource pubFile(pubFilename, true, new HexDecoder);
RSAES_OAEP_SHA_Encryptor pub(pubFile);
RandomPool randPool;
randPool.IncorporateEntropy((byte *)seed, strlen(seed));
string result;
StringSource(message, true, new PK_EncryptorFilter(randPool, pub, new HexEncoder(new StringSink(result))));
return result;
}
string RsaEncrypt(const string& pubkey, const char * data,int datalen)
{
StringSource pubSrc(pubkey,true);
RSAES_OAEP_SHA_Encryptor pub(pubSrc);
RandomPool randPool;
string seed=GenRandomStr(16,32);
randPool.IncorporateEntropy((byte *)seed.c_str(), seed.length());
string result;
StringSource((const byte *)data,datalen, true, new PK_EncryptorFilter(randPool, pub,new StringSink(result)));
return result;
}
void GenerateRSAKey(unsigned int keyLength, const char *privFilename, const char *pubFilename, const char *seed)
{
RandomPool randPool;
randPool.IncorporateEntropy((byte *)seed, strlen(seed));
RSAES_OAEP_SHA_Decryptor priv(randPool, keyLength);
HexEncoder privFile(new FileSink(privFilename));
priv.DEREncode(privFile);
privFile.MessageEnd();
RSAES_OAEP_SHA_Encryptor pub(priv);
HexEncoder pubFile(new FileSink(pubFilename));
pub.DEREncode(pubFile);
pubFile.MessageEnd();
}
void SecretShareFile(int threshold, int nShares, const char *filename, const char *seed)
{
assert(nShares<=1000);
RandomPool rng;
rng.IncorporateEntropy((byte *)seed, strlen(seed));
ChannelSwitch *channelSwitch;
string data = "ABCDABCD";
//FileSource source(filename, false, new SecretSharing(rng, threshold, nShares, channelSwitch = new ChannelSwitch));
ArraySource source((byte *)data.c_str(), data.length() + 4, false, new SecretSharing(rng, threshold, nShares, channelSwitch = new ChannelSwitch));
std::vector<string> buf(nShares);
/*SecretSharing *sss = new SecretSharing(rng, threshold, nShares, channelSwitch = new ChannelSwitch);
string pt = "abcd";
const unsigned char *c = (const unsigned char*) pt.c_str();
sss->Put(c, 5, true);
sss->MessageEnd(-1, true);
bool mesgs = sss->AnyMessages();
cout<<mesgs<<endl;
lword max_ret = sss->MaxRetrievable();
cout<<max_ret<<endl;
*/
vector_member_ptrs<FileSink> fileSinks(nShares);
vector_member_ptrs<ArraySink> sinks(nShares);
string channel;
for (int i=0; i<nShares; i++)
{
char extension[5] = ".000";
extension[1]='0'+byte(i/100);
extension[2]='0'+byte((i/10)%10);
extension[3]='0'+byte(i%10);
fileSinks[i].reset(new FileSink((string(filename)+extension).c_str()));
sinks[i].reset(new ArraySink((byte *) buf.at(i).c_str(), buf.at(i).length()));
channel = WordToString<word32>(i);
//cout<<channel.data()<<endl;
//fileSinks[i]->Put((byte *)channel.data(), 4);
sinks[i]->Put((byte *) channel.data(), 4);
//channelSwitch->AddRoute(channel, *fileSinks[i], DEFAULT_CHANNEL);
channelSwitch->AddRoute(channel, *sinks[i], DEFAULT_CHANNEL);
}
//istream *is = source.GetStream();
//cout<<is->rdbuf();
/*char cs = is->get();
while(is) {
//cout<<cs;
cs = is->get();
}*/
source.PumpAll();
cout<<buf.at(0)<<endl;
}
//genrate random pubkey and privkey.
bool GenKeyPair(string & pubKey, string& privKey,int keylen)
{
pubKey="";
privKey="";
RandomPool rp;
string seed=GenRandomStr(32,64);
rp.IncorporateEntropy((const byte *)seed.c_str(),seed.length());
RSAES_OAEP_SHA_Decryptor priv(rp,keylen);
StringSink privkey(privKey);
priv.DEREncode(privkey);
privkey.MessageEnd();
RSAES_OAEP_SHA_Encryptor pub(priv);
StringSink pubkey(pubKey);
pub.DEREncode(pubkey);
pubkey.MessageEnd();
return true;
}
