i2pd/Identity.cpp
2014-08-06 11:09:06 -04:00

112 lines
3.0 KiB
C++
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#include <time.h>
#include <stdio.h>
#include <cryptopp/sha.h>
#include <cryptopp/osrng.h>
#include <cryptopp/dh.h>
#include <cryptopp/dsa.h>
#include "CryptoConst.h"
#include "Identity.h"
#include "base64.h"
namespace i2p
{
namespace data
{
Identity& Identity::operator=(const Keys& keys)
{
// copy public and signing keys together
memcpy (publicKey, keys.publicKey, sizeof (publicKey) + sizeof (signingKey));
memset (&certificate, 0, sizeof (certificate));
return *this;
}
bool Identity::FromBase64 (const std::string& s)
{
size_t count = Base64ToByteStream (s.c_str(), s.length(), publicKey, DEFAULT_IDENTITY_SIZE);
return count == DEFAULT_IDENTITY_SIZE;
}
size_t Identity::FromBuffer (const uint8_t * buf, size_t len)
{
memcpy (publicKey, buf, DEFAULT_IDENTITY_SIZE);
// TODO: process certificate
return DEFAULT_IDENTITY_SIZE;
}
IdentHash Identity::Hash() const
{
IdentHash hash;
CryptoPP::SHA256().CalculateDigest(hash, publicKey, DEFAULT_IDENTITY_SIZE);
return hash;
}
PrivateKeys& PrivateKeys::operator=(const Keys& keys)
{
pub = keys;
memcpy (privateKey, keys.privateKey, 276); // 256 + 20
return *this;
}
Keys CreateRandomKeys ()
{
Keys keys;
CryptoPP::AutoSeededRandomPool rnd;
// encryption
CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
dh.GenerateKeyPair(rnd, keys.privateKey, keys.publicKey);
// signing
CryptoPP::DSA::PrivateKey privateKey;
CryptoPP::DSA::PublicKey publicKey;
privateKey.Initialize (rnd, i2p::crypto::dsap, i2p::crypto::dsaq, i2p::crypto::dsag);
privateKey.MakePublicKey (publicKey);
privateKey.GetPrivateExponent ().Encode (keys.signingPrivateKey, 20);
publicKey.GetPublicElement ().Encode (keys.signingKey, 128);
return keys;
}
void CreateRandomDHKeysPair (DHKeysPair * keys)
{
if (!keys) return;
CryptoPP::AutoSeededRandomPool rnd;
CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
dh.GenerateKeyPair(rnd, keys->privateKey, keys->publicKey);
}
RoutingKey CreateRoutingKey (const IdentHash& ident)
{
uint8_t buf[41]; // ident + yyyymmdd
memcpy (buf, (const uint8_t *)ident, 32);
time_t t = time (nullptr);
struct tm tm;
// WARNING!!! check if it is correct
#ifdef _WIN32
gmtime_s(&tm, &t);
// <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>-<2D><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> sprintf'<27><>. <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
// http://msdn.microsoft.com/en-us/library/ce3zzk1k.aspx
sprintf_s((char *)(buf + 32), 9, "%4i%2i%2i", tm.tm_year, tm.tm_mon, tm.tm_mday);
#else
gmtime_r(&t, &tm);
// <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>-<2D><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> sprintf'<27><>. <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
sprintf((char *)(buf + 32), "%4i%2i%2i", tm.tm_year, tm.tm_mon, tm.tm_mday);
#endif
RoutingKey key;
CryptoPP::SHA256().CalculateDigest(key.hash, buf, 40);
return key;
}
XORMetric operator^(const RoutingKey& key1, const RoutingKey& key2)
{
XORMetric m;
m.metric_ll[0] = key1.hash_ll[0] ^ key2.hash_ll[0];
m.metric_ll[1] = key1.hash_ll[1] ^ key2.hash_ll[1];
m.metric_ll[2] = key1.hash_ll[2] ^ key2.hash_ll[2];
m.metric_ll[3] = key1.hash_ll[3] ^ key2.hash_ll[3];
return m;
}
}
}