path: root/plugins/CryptoPP/src/cpp_rsam.cpp

#include "commonheaders.h"

///////////////////////////////////////////////////////////////////////////

#define RAND_SIZE (256/8)

RSA_EXPORT exports = {
    rsa_gen_keypair,
    rsa_get_keypair,
    rsa_get_keyhash,
    rsa_set_keypair,
    rsa_get_pubkey,
    rsa_set_pubkey,
    rsa_set_timeout,
    rsa_get_state,
    rsa_get_hash,
    rsa_connect,
    rsa_disconnect,
    rsa_disabled,
    rsa_recv,
    rsa_send,
    rsa_encrypt_file,
    rsa_decrypt_file,
    utf8encode,
    utf8decode,
    is_7bit_string,
    is_utf8_string,
    rsa_export_keypair,
    rsa_import_keypair,
    rsa_export_pubkey,
    rsa_import_pubkey
};

pRSA_IMPORT imp;

string null;
int timeout = 10;

const string priv_beg = "-----BEGIN SECUREIM PRIVATE KEY BLOCK-----";
const string priv_end = "-----END SECUREIM PRIVATE KEY BLOCK-----";

const string pub_beg = "-----BEGIN SECUREIM PUBLIC KEY BLOCK-----";
const string pub_end = "-----END SECUREIM PUBLIC KEY BLOCK-----";

const string crlf = "\x0D\x0A";

///////////////////////////////////////////////////////////////////////////


int __cdecl rsa_init(pRSA_EXPORT* e, pRSA_IMPORT i) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_init");
#endif
	*e = &exports;
	imp = i;
	if ( !hRSA4096 ) {
		// create context for private rsa keys
		hRSA4096 = (HANDLE) cpp_create_context(MODE_RSA_4096|MODE_PRIV_KEY);
		pCNTX tmp = (pCNTX) hRSA4096;
		pRSAPRIV p = new RSAPRIV;
		tmp->pdata = (PBYTE) p;
	}
	return 1;
}


int __cdecl rsa_done(void) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_done");
#endif
	if ( hRSA4096 ) {
		pCNTX tmp = (pCNTX) hRSA4096;
		pRSAPRIV p = (pRSAPRIV)tmp->pdata;
		delete p;
		tmp->pdata = 0;
		cpp_delete_context(hRSA4096);
	}

	return 1;
}


///////////////////////////////////////////////////////////////////////////


pRSAPRIV rsa_gen_keys(HANDLE context) {

	if ( context!=hRSA4096 ) return 0;

#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_gen_keys: %d", context);
#endif
	pCNTX ptr = get_context_on_id(context);
	pRSAPRIV r = (pRSAPRIV) ptr->pdata;

	string priv, pub;
	GenerateRSAKey(4096, priv, pub);

	StringSource privsrc(priv, true, NULL);
	RSAES_PKCS1v15_Decryptor Decryptor(privsrc);

	priv = tlv(1, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetModulus() )) +
	       tlv(2, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPublicExponent() )) +
	       tlv(3, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPrivateExponent() )) +
	       tlv(4, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPrime1() )) +
	       tlv(5, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPrime2() )) +
	       tlv(6, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetModPrime1PrivateExponent() )) +
	       tlv(7, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetModPrime2PrivateExponent() )) +
	       tlv(8, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetMultiplicativeInverseOfPrime2ModPrime1() ));

	init_priv(r,priv);

	return r;
}


pRSAPRIV rsa_get_priv(pCNTX ptr) {
	pCNTX p = get_context_on_id(hRSA4096);
	pRSAPRIV r = (pRSAPRIV) p->pdata;
	return r;
}


int __cdecl rsa_gen_keypair(short mode) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_gen_keypair: %d", mode);
#endif
	if ( mode&MODE_RSA_4096 ) rsa_gen_keys(hRSA4096); // 4096

	return 1;
}


int __cdecl rsa_get_keypair(short mode, PBYTE privKey, int* privKeyLen, PBYTE pubKey, int* pubKeyLen) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_get_keypair: %d", mode);
#endif
	pCNTX ptr = get_context_on_id(hRSA4096);
	pRSAPRIV r = (pRSAPRIV) ptr->pdata;

	*privKeyLen = r->priv_k.length(); if ( privKey ) r->priv_k.copy((char*)privKey, *privKeyLen);
	*pubKeyLen = r->pub_k.length(); if ( pubKey ) r->pub_k.copy((char*)pubKey, *pubKeyLen);

	return 1;
}


int __cdecl rsa_get_keyhash(short mode, PBYTE privKey, int* privKeyLen, PBYTE pubKey, int* pubKeyLen) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_get_keyhash: %d", mode);
#endif
	pCNTX ptr = get_context_on_id(hRSA4096);
	pRSAPRIV r = (pRSAPRIV) ptr->pdata;

	if ( privKey ) { *privKeyLen = r->priv_s.length(); r->priv_s.copy((char*)privKey, *privKeyLen); }
	if ( pubKey ) { *pubKeyLen = r->pub_s.length(); r->pub_s.copy((char*)pubKey, *pubKeyLen); }

	return 1;
}


int __cdecl rsa_set_keypair(short mode, PBYTE privKey, int privKeyLen) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_set_keypair: %s", privKey);
#endif
	pCNTX ptr = get_context_on_id(hRSA4096);
	pRSAPRIV r = (pRSAPRIV) ptr->pdata;

	if ( privKey && privKeyLen ) {
	    string priv;
	    priv.assign((char*)privKey, privKeyLen);

	    if ( mode & MODE_RSA_BER ) {
		// old BER format
		StringStore s(priv);
		r->priv.BERDecode(s);

		RSAES_PKCS1v15_Decryptor Decryptor(r->priv);

		priv = tlv(1, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetModulus() )) +
		       tlv(2, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPublicExponent() )) +
		       tlv(3, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPrivateExponent() )) +
		       tlv(4, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPrime1() )) +
		       tlv(5, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetPrime2() )) +
		       tlv(6, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetModPrime1PrivateExponent() )) +
		       tlv(7, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetModPrime2PrivateExponent() )) +
		       tlv(8, IntegerToBinary(Decryptor.GetTrapdoorFunction().GetMultiplicativeInverseOfPrime2ModPrime1() ));

	    }
	    init_priv(r,priv);
	}

	return 1;
}


int __cdecl rsa_get_pubkey(HANDLE context, PBYTE pubKey, int* pubKeyLen) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_get_pubkey: %s", pubKey);
#endif
	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);

	*pubKeyLen = p->pub_k.length(); if ( pubKey ) p->pub_k.copy((char*)pubKey, *pubKeyLen);

	return 1;
}


int __cdecl rsa_set_pubkey(HANDLE context, PBYTE pubKey, int pubKeyLen) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_set_pubkey: %s", pubKey);
#endif
	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);

	if ( pubKey && pubKeyLen ) {
	    string pub;
	    pub.assign((char*)pubKey, pubKeyLen);
	    init_pub(p,pub);
	}

	return 1;
}


void __cdecl rsa_set_timeout(int t) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_set_timeout: %d", t);
#endif
	timeout = t;
}


int __cdecl rsa_get_state(HANDLE context) {

	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);

	return p->state;
}


int __cdecl rsa_get_hash(PBYTE pubKey, int pubKeyLen, PBYTE pubHash, int* pubHashLen) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_get_hash: %d", pubKeyLen);
#endif
	string sig;
	sig = ::hash(pubKey, pubKeyLen);

	*pubHashLen = sig.length();
	if ( pubHash ) sig.copy((char*)pubHash, *pubHashLen);

	return 1;
}


int __cdecl rsa_connect(HANDLE context) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_connect: %08x", context);
#endif
	pCNTX ptr = get_context_on_id(context); if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr); if (p->state) return p->state;
	pRSAPRIV r = rsa_get_priv(ptr);

        if (ptr->mode&MODE_RSA_ONLY) {
		inject_msg(context,0x0D,tlv(0,0)+tlv(1,r->pub_k)+tlv(2,p->pub_s));
		p->state = 0x0D;
        }
        else {
		inject_msg(context,0x10,tlv(0,0)+tlv(1,r->pub_s)+tlv(2,p->pub_s));
		p->state = 2;
	}
	p->time = gettime()+timeout;

	return p->state;
}


int __cdecl rsa_disconnect(HANDLE context) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_disconnect: %08x", context);
#endif
	pCNTX ptr = get_context_on_id(context); if (!ptr) return 0;
	rsa_free( ptr ); // óäàëèì òðýä è î÷åðåäü ñîîáùåíèé

	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr); 
	if ( !p->state ) return 1;

	PBYTE buffer=(PBYTE) alloca(RAND_SIZE);
	GlobalRNG().GenerateBlock(buffer,RAND_SIZE);
	inject_msg(context,0xF0,encode_msg(0,p,::hash(buffer,RAND_SIZE)));

	p->state = 0;
	imp->rsa_notify(context,-3); // ñîåäèíåíèå ðàçîðâàíî âðó÷íóþ

	return 1;
}


int __cdecl rsa_disabled(HANDLE context) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_disabled: %08x", context);
#endif
	pCNTX ptr = get_context_on_id(context); if (!ptr) return 0;
	rsa_free( ptr ); // óäàëèì òðýä è î÷åðåäü ñîîáùåíèé

	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr); 
	p->state = 0;
	inject_msg(context,0xFF,null);
//	imp->rsa_notify(-context,-8); // ñîåäèíåíèå ðàçîðâàíî ïî ïðè÷èíå "disabled"
	return 1;
}


LPSTR __cdecl rsa_recv(HANDLE context, LPCSTR msg) {

#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_recv: %s", msg);
#endif
	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);
	pRSAPRIV r = rsa_get_priv(ptr);

	rtrim(msg);

	string buf = base64decode(msg);
	if ( !buf.length() ) return 0;

	string data; int type;
	un_tlv(buf,type,data);
	if ( type==-1 ) return 0;

#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_recv: %02x %d", type, p->state);
#endif
	if ( type>0x10 && type<0xE0 )  // ïðîâåðèì òèï ñîîáùåíèÿ (êîãäà ñîåäèíåíèå åùå íå óñòàíîâëåíî)
	    if ( p->state==0 || p->state!=(type>>4) ) { // íåâåðíîå ñîñòîÿíèå
		// øëåì ïåðåðûâàíèå ñåññèè
		p->state=0; p->time=0;
		rsa_free( ptr ); // óäàëèì òðýä è î÷åðåäü ñîîáùåíèé
		null_msg(context,0x00,-1); // ñåññèÿ ðàçîðâàíà ïî îøèáêå, íåâåðíûé òèï ñîîáùåíèÿ
		return 0;
	    }

	switch( type ) {

	case 0x00: // ïðåðûâàíèå ñåññèè ïî îøèáêå äðóãîé ñòîðîíîé
	{
	        // åñëè ñîåäèíåíèå óñòàíîâëåíî - íè÷åãî íå äåëàåì
		if ( p->state == 0 || p->state == 7 ) return 0;
		// èíà÷å ñáðàñûâàåì òåêóùåå ñîñòîÿíèå
		p->state=0; p->time=0;
		imp->rsa_notify(context,-2); // ñåññèÿ ðàçîðâàíà ïî îøèáêå äðóãîé ñòîðîíîé
	} break;

	// ýòî âñå áóäåì îáðàáàòûâàòü â îòäåëüíîì ïîòîêå, ÷òîáû èçáåæàòü òàéìàóòîâ
	case 0x10: // çàïðîñ íà óñòàíîâêó ñîåäèíåíèÿ
	case 0x22: // ïîëó÷èëè óäàëåííûé ïàáëèê, îòïðàâëÿåì óæå êðèïòîêëþ÷
	case 0x23: // îòïðàâëÿåì ëîêàëüíûé ïàáëèê
	case 0x24: // ïîëó÷èëè óäàëåííûé ïàáëèê, îòïðàâèì ëîêàëüíûé ïàáëèê
	case 0x33: // ïîëó÷èëè óäàëåííûé ïàáëèê, îòïðàâëÿåì êðèïòîêëþ÷
	case 0x34:
	case 0x21: // ïîëó÷èëè êðèïòîêëþ÷, îòïðàâëÿåì êðèïòîòåñò
	case 0x32:
	case 0x40:
	case 0x0D: // çàïðîñ ïàáëèêà
	case 0xD0: // îòâåò ïàáëèêîì
	{
		if ( !p->event ) {
			p->event = CreateEvent(NULL,FALSE,FALSE,NULL);
			unsigned int tID;
			p->thread = (HANDLE) _beginthreadex(NULL, 0, sttConnectThread, (PVOID)context, 0, &tID);
#if defined(_DEBUG) || defined(NETLIB_LOG)
			Sent_NetLog("rsa_recv: _beginthreadex(sttConnectThread)");
#endif
		}
		EnterCriticalSection(&localQueueMutex);
		p->queue->push(tlv(type,data));
		LeaveCriticalSection(&localQueueMutex);
		SetEvent(p->event); // ñêàçàëè îáðàáàòûâàòü :)
	} break;

	case 0x50: // ïîëó÷èëè êðèïòîòåñò, îòïðàâëÿåì ñâîé êðèïòîòåñò
	{
		string msg = decode_msg(p,data);
		if ( !msg.length() ) {
			p->state=0; p->time=0;
			null_msg(context,0x00,-type); // ñåññèÿ ðàçîðâàíà ïî îøèáêå
			return 0;
		}
		PBYTE buffer=(PBYTE) alloca(RAND_SIZE);
		GlobalRNG().GenerateBlock(buffer,RAND_SIZE);
        	inject_msg(context,0x60,encode_msg(0,p,::hash(buffer,RAND_SIZE)));
		p->state=7; p->time=0;
		rsa_free_thread( p ); // óäàëèì òðýä è î÷åðåäü ñîîáùåíèé
		imp->rsa_notify(context,1);	// çàåáèñÿ, êðèïòîñåññèÿ óñòàíîâëåíà
	} break;

	case 0x60: // ïîëó÷èëè êðèïòîòåñò, ñåññèÿ óñòàíîâëåíà
	{
		string msg = decode_msg(p,data);
		if ( !msg.length() ) {
			p->state=0; p->time=0;
			null_msg(context,0x00,-type); // ñåññèÿ ðàçîðâàíà ïî îøèáêå
			return 0;
		}
		p->state=7; p->time=0;
		rsa_free_thread( p ); // óäàëèì òðýä è î÷åðåäü ñîîáùåíèé
		imp->rsa_notify(context,1);	// çàåáèñÿ, êðèïòîñåññèÿ óñòàíîâëåíà
	} break;

	case 0x70: // ïîëó÷èëè AES ñîîáùåíèå, äåêîäèðóåì
	{
		SAFE_FREE(ptr->tmp);
		string msg = decode_msg(p,data);
		if ( msg.length() ) {
			ptr->tmp = (LPSTR) _strdup(msg.c_str());
		}
		else {
			imp->rsa_notify(context,-5); // îøèáêà äåêîäèðîâàíèÿ AES ñîîáùåíèÿ
		}
		return ptr->tmp;
	} break;

	case 0xE0: // ïîëó÷èëè RSA ñîîáùåíèå, äåêîäèðóåì
	{
		SAFE_FREE(ptr->tmp);
		string msg = decode_rsa(p,r,data);
		if ( msg.length() ) {
			ptr->tmp = (LPSTR) _strdup(msg.c_str());
		}
		else {
			imp->rsa_notify(context,-6); // îøèáêà äåêîäèðîâàíèÿ RSA ñîîáùåíèÿ
		}
		return ptr->tmp;
	} break;

	case 0xF0: // ðàçðûâ ñîåäèíåíèÿ âðó÷íóþ
	{
		if ( p->state != 7 ) return 0;
		string msg = decode_msg(p,data);
		if ( !msg.length() ) return 0;
		p->state=0;
		rsa_free( ptr ); // óäàëèì òðýä è î÷åðåäü ñîîáùåíèé
		imp->rsa_notify(context,-4); // ñîåäèíåíèå ðàçîðâàíî âðó÷íóþ äðóãîé ñòîðîíîé
	} break;

	case 0xFF: // ðàçðûâ ñîåäèíåíèÿ ïî ïðè÷èíå "disabled"
	{
		p->state=0;
		rsa_free( ptr ); // óäàëèì òðýä è î÷åðåäü ñîîáùåíèé
		imp->rsa_notify(context,-8); // ñîåäèíåíèå ðàçîðâàíî ïî ïðè÷èíå "disabled"
	} break;

	}

	if ( p->state != 0 && p->state != 7 )
		p->time = gettime() + timeout;

	return 0;
}

int __cdecl rsa_send(HANDLE context, LPCSTR msg) {

	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr); if (p->state!=0 && p->state!=7) return 0;

	if ( p->state == 7 ) // ñåññèÿ óñòàíîâëåíà, øèôðóåì AES è îòïðàâëÿåì
		inject_msg(context,0x70,encode_msg(1,p,string(msg)));
	else
	if ( p->state == 0 ) { // ñåññèÿ  óñòàíîâëåíà, îòïðàâëÿåì RSA ñîîáùåíèå
		if ( !p->pub_k.length() ) return 0;
		// åñòü ïàáëèê êëþ÷ - îòïðàâèì ñîîáùåíèå
		pRSAPRIV r = rsa_get_priv(ptr);
		inject_msg(context,0xE0,encode_rsa(1,p,r,string(msg)));
	}

	return 1;
}


void inject_msg(HANDLE context, int type, const string& msg) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("inject_msg(%02x): %s", type, msg.c_str());
#endif
	string txt=base64encode(tlv(type,msg));
	imp->rsa_inject(context,(LPCSTR)txt.c_str());
}


string encode_msg(short z, pRSADATA p, string& msg) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("encode_msg: %s", msg.c_str());
#endif
	string zlib = (z) ? cpp_zlibc(msg) : msg;
	string sig = ::hash(zlib);

	string ciphered;
	try {
		CBC_Mode<AES>::Encryption enc((PBYTE)p->aes_k.data(),p->aes_k.length(),(PBYTE)p->aes_v.data());
		StreamTransformationFilter cbcEncryptor(enc,new StringSink(ciphered));
		cbcEncryptor.Put((PBYTE)zlib.data(),zlib.length());
		cbcEncryptor.MessageEnd();
	}
	catch (...) {
		;
	}
	return tlv(z,ciphered)+tlv(2,sig);
}


string decode_msg(pRSADATA p, string& msg) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("decode_msg: %s", msg.c_str());
#endif
	string ciphered,sig; int t1,t2;
	un_tlv(msg,t1,ciphered);
	un_tlv(msg,t2,sig);

	string unciphered,zlib;
	try {
		CBC_Mode<AES>::Decryption dec((PBYTE)p->aes_k.data(),p->aes_k.length(),(PBYTE)p->aes_v.data());
		StreamTransformationFilter cbcDecryptor(dec,new StringSink(zlib));
		cbcDecryptor.Put((PBYTE)ciphered.data(),ciphered.length());
		cbcDecryptor.MessageEnd();

		if ( sig == ::hash(zlib) ) {
			unciphered = (t1==1) ? cpp_zlibd(zlib) : zlib;
		}
	}
	catch (...) {
		;
	}
	return unciphered;
}


string encode_rsa(short z, pRSADATA p, pRSAPRIV r, string& msg) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("encode_rsa: %s", msg.c_str());
#endif
	string zlib = (z) ? cpp_zlibc(msg) : msg;

	string enc = RSAEncryptString(p->pub,zlib);
	string sig = RSASignString(r->priv,zlib);

	return tlv(z,enc)+tlv(2,sig);
}


string decode_rsa(pRSADATA p, pRSAPRIV r, string& msg) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("decode_rsa: %s", msg.c_str());
#endif
	string ciphered,sig; int t1,t2;
	un_tlv(msg,t1,ciphered);
	un_tlv(msg,t2,sig);

	string unciphered,zlib;
	zlib = RSADecryptString(r->priv,ciphered);
	if ( zlib.length() && RSAVerifyString(p->pub,zlib,sig) ) {
		unciphered = (t1==1) ? cpp_zlibd(zlib) : zlib;
	}
	return unciphered;
}


string gen_aes_key_iv(short m, pRSADATA p, pRSAPRIV r) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("gen_aes_key_iv: %04x", m);
#endif
	PBYTE buffer=(PBYTE) alloca(RAND_SIZE);

	GlobalRNG().GenerateBlock(buffer, RAND_SIZE);
	p->aes_k = hash256(buffer,RAND_SIZE);
	
	GlobalRNG().GenerateBlock(buffer, RAND_SIZE);
	p->aes_v = hash256(buffer,RAND_SIZE);

	string buf = tlv(10,p->aes_k)+tlv(11,p->aes_v);

	return encode_rsa(0,p,r,buf);
}


void init_priv(pRSAPRIV r, string& priv) {

	r->priv_k = priv;
	r->priv_s = ::hash(priv);

	int t;
	string tmp, n, e, d, p, q, dp, dq, u;

	while( priv.length() ) {
		un_tlv(priv,t,tmp);
		switch(t) {
		case 1: n = tmp; break;
		case 2: e = tmp; break;
		case 3: d = tmp; break;
		case 4: p = tmp; break;
		case 5: q = tmp; break;
		case 6: dp = tmp; break;
		case 7: dq = tmp; break;
		case 8: u = tmp; break;
		}
	}

	// if ( !empty );

	r->pub_k = tlv(1,n)+tlv(2,e);
	r->pub_s = ::hash(r->pub_k);

	r->priv.Initialize(BinaryToInteger(n),BinaryToInteger(e),
			   BinaryToInteger(d),BinaryToInteger(p),BinaryToInteger(q),
			   BinaryToInteger(dp),BinaryToInteger(dq),BinaryToInteger(u));
}


void init_pub(pRSADATA p, string& pub) {

	p->pub_k = pub;
	p->pub_s = ::hash(pub);

	int t;
	string tmp, n, e;

	while( pub.length() ) {
		un_tlv(pub,t,tmp);
		switch(t) {
		case 1: n = tmp; break;
		case 2: e = tmp; break;
		}
	}

	// if ( !empty );

	p->pub.Initialize(BinaryToInteger(n),BinaryToInteger(e));
}


void null_msg(HANDLE context, int type, int status) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("null_msg: %02x", status);
#endif
	inject_msg(context,type,null);
	imp->rsa_notify(context,status);
}


void rsa_timeout(HANDLE context, pRSADATA p) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_timeout");
#endif
	p->state=0; p->time=0;
//	null_msg(context,0x00,-7);
	imp->rsa_notify(context,-7); // ñåññèÿ ðàçîðâàíà ïî òàéìàóòó
}


int __cdecl rsa_encrypt_file(HANDLE context,LPCSTR file_in,LPCSTR file_out) {

	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr); if (p->state!=7) return 0;

	try {
		CBC_Mode<AES>::Encryption enc((PBYTE)p->aes_k.data(),p->aes_k.length(),(PBYTE)p->aes_v.data());
		FileSource *f = new FileSource(file_in,true,new StreamTransformationFilter (enc,new FileSink(file_out)));
		delete f;
	}
	catch (...) {
		return 0;
	}
	return 1;
}


int __cdecl rsa_decrypt_file(HANDLE context,LPCSTR file_in,LPCSTR file_out) {

	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr); if (p->state!=7) return 0;

	try {
		CBC_Mode<AES>::Decryption dec((PBYTE)p->aes_k.data(),p->aes_k.length(),(PBYTE)p->aes_v.data());
		FileSource *f = new FileSource(file_in,true,new StreamTransformationFilter (dec,new FileSink(file_out)));
		delete f;
	}
	catch (...) {
		return 0;
	}
	return 1;
}


int __cdecl rsa_recv_thread(HANDLE context, string& msg) {

#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_recv_thread: %s", msg.c_str());
#endif
	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);
	pRSAPRIV r = rsa_get_priv(ptr);

	string data; int type;
	un_tlv(msg,type,data);
	if ( type==-1 ) return 0;

#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_recv_thread: %02x %d", type, p->state);
#endif
	int t[4];

	switch( type ) {

	case 0x10:
	{
		int features; string sha1,sha2;
		un_tlv(un_tlv(un_tlv(data,t[0],features),t[1],sha1),t[2],sha2);
		BOOL lr = (p->pub_s==sha1); BOOL ll = (r->pub_s==sha2);
		switch( (lr<<4)|ll ) {
		case 0x11: { // îáà ïàáëèêà ñîâïàëè
			inject_msg(context,0x21,gen_aes_key_iv(ptr->mode,p,r));
			p->state=5;
		} break;
		case 0x10: { // ñîâïàë óäàëåííûé ïàáëèê, íóæåí ëîêàëüíûé
			inject_msg(context,0x22,tlv(0,features)+tlv(1,r->pub_k)+tlv(2,r->pub_s));
			p->state=3;
		} break;
		case 0x01: { // ñîâïàë ëîêàëüíûé ïàáëèê, íóæåí óäàëåííûé
			inject_msg(context,0x23,tlv(0,features));
			p->state=3;
		} break;
		case 0x00: { // íå ñîâïàëè îáà ïàáëèêà
			inject_msg(context,0x24,tlv(0,features)+tlv(1,r->pub_k)+tlv(2,r->pub_s));
			p->state=3;
		} break;
		}
	} break;

	case 0x22: // ïîëó÷èëè óäàëåííûé ïàáëèê, îòïðàâëÿåì óæå êðèïòîêëþ÷
	{
		int features; string pub;
		un_tlv(un_tlv(data,t[0],features),t[1],pub);
		string sig = ::hash(pub);
		if ( !imp->rsa_check_pub(context,(PBYTE)pub.data(),pub.length(),(PBYTE)sig.data(),sig.length()) ) {
			p->state=0; p->time=0;
			null_msg(context,0x00,-type); // ñåññèÿ ðàçîðâàíà ïî îøèáêå
			return 0;
		}
		init_pub(p,pub);
		if ( p->state==0 ) { // timeout
//			rsa_connect(context);
			return -1;
		}
		inject_msg(context,0x32,gen_aes_key_iv(ptr->mode,p,r));
		p->state=5;
	} break;

	case 0x23: // îòïðàâëÿåì ëîêàëüíûé ïàáëèê
	{
		int features;
		un_tlv(data,t[0],features);
		inject_msg(context,0x33,tlv(1,r->pub_k)+tlv(2,r->pub_s));
		p->state=4;
	} break;

	case 0x24: // ïîëó÷èëè óäàëåííûé ïàáëèê, îòïðàâèì ëîêàëüíûé ïàáëèê
	{
		int features; string pub;
		un_tlv(un_tlv(data,t[0],features),t[1],pub);
		string sig = ::hash(pub);
		if ( !imp->rsa_check_pub(context,(PBYTE)pub.data(),pub.length(),(PBYTE)sig.data(),sig.length()) ) {
			p->state=0; p->time=0;
			null_msg(context,0x00,-type); // ñåññèÿ ðàçîðâàíà ïî îøèáêå
			return 0;
		}
		init_pub(p,pub);
		if ( p->state==0 ) { // timeout
//			rsa_connect(context);
			return -1;
		}
		inject_msg(context,0x34,tlv(1,r->pub_k)+tlv(2,r->pub_s));
		p->state=4;
	} break;

	case 0x33: // ïîëó÷èëè óäàëåííûé ïàáëèê, îòïðàâëÿåì êðèïòîêëþ÷
	case 0x34:
	{
		string pub;
		un_tlv(data,t[0],pub);
		string sig = ::hash(pub);
		if ( !imp->rsa_check_pub(context,(PBYTE)pub.data(),pub.length(),(PBYTE)sig.data(),sig.length()) ) {
			p->state=0; p->time=0;
			null_msg(context,0x00,-type); // ñåññèÿ ðàçîðâàíà ïî îøèáêå
			return 0;
		}
		init_pub(p,pub);
		if ( p->state==0 ) { // timeout
//			rsa_connect(context);
			return -1;
		}
		inject_msg(context,0x40,gen_aes_key_iv(ptr->mode,p,r));
		p->state=5;
	} break;

	case 0x21: // ïîëó÷èëè êðèïòîêëþ÷, îòïðàâëÿåì êðèïòîòåñò
	case 0x32:
	case 0x40:
	{
		string key = decode_rsa(p,r,data);
		if ( !key.length() ) {
			p->state=0; p->time=0;
			null_msg(context,0x00,-type); // ñåññèÿ ðàçîðâàíà ïî îøèáêå
			return 0;
		}
		un_tlv(key,t[0],p->aes_k);
		un_tlv(key,t[1],p->aes_v);
		PBYTE buffer=(PBYTE) alloca(RAND_SIZE);
		GlobalRNG().GenerateBlock(buffer,RAND_SIZE);
		inject_msg(context,0x50,encode_msg(0, p, ::hash(buffer,RAND_SIZE)));
		p->state=6;
	} break;

	case 0x0D: // çàïðîñ ïàáëèêà
	case 0xD0: // îòâåò ïàáëèêîì
	{
		int features; string pub,sha;
		un_tlv(un_tlv(un_tlv(data,t[0],features),t[1],pub),t[2],sha);
		if ( p->pub_k!=pub ) { // ïðèøåë íîâûé ïàáëèê
			string sig = ::hash(pub);
			if ( !imp->rsa_check_pub(context,(PBYTE)pub.data(),pub.length(),(PBYTE)sig.data(),sig.length()) ) {
				p->state=0; p->time=0;
				null_msg(context,0x00,-type); // ñåññèÿ ðàçîðâàíà ïî îøèáêå
				return 0;
			}
			init_pub(p,pub);
		}
		if ( type == 0x0D ) { // íóæíî îòïðàâèòü ìîé ïàáëèê
			inject_msg(context,0xD0,tlv(0,features)+tlv(1,r->pub_k)+tlv(2,p->pub_s));
		}
		p->state=0; p->time=0;
	} break;

	}

	if ( p->state != 0 && p->state != 7 )
		p->time = gettime() + timeout;

	return 1;
}


void rsa_alloc( pCNTX ptr ) {
	pRSADATA p = new RSADATA;
	p->state = 0;
	p->time = 0;
	p->thread = p->event = NULL;
	p->thread_exit = 0;
	p->queue = new STRINGQUEUE;
	ptr->pdata = (PBYTE) p;
}


void rsa_free( pCNTX ptr ) {
	pRSADATA p = (pRSADATA) ptr->pdata;
	if (p && p->event) {
		p->thread_exit = 2; // îòïóñêàåì ïîòîê â ñâîáîäíîå ïëàâàíèå
		SetEvent( p->event );
	}
	else {
		delete p->queue;
		delete p;
		ptr->pdata = NULL;
	}
}


void rsa_free_thread( pRSADATA p ) {
	if ( p->event ) {
		p->thread_exit = 1;
		SetEvent( p->event );
		// æäåì çàâåðøåíèÿ ïîòîêà
		WaitForSingleObject(p->thread, INFINITE);
		CloseHandle( p->thread );
		CloseHandle( p->event );
		p->thread = p->event = NULL;
		p->thread_exit = 0;
	}
	p->time = 0;
	clear_queue( p );
}


void clear_queue( pRSADATA p ) {
	EnterCriticalSection(&localQueueMutex);
	while( p->queue && !p->queue->empty() ) {
       		p->queue->pop();
	}
	LeaveCriticalSection(&localQueueMutex);
}


// establish RSA/AES thread
unsigned __stdcall sttConnectThread( LPVOID arg ) {

	HANDLE context = (HANDLE) arg;

	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);

	while(1) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
		Sent_NetLog("sttConnectThread: WaitForSingleObject");
#endif
		WaitForSingleObject(p->event, INFINITE); // dwMsec rc==WAIT_TIMEOUT
		if ( p->thread_exit == 1 ) return 0;
		if ( p->thread_exit == 2 ) {
			// ìû â ñâîáîäíîì ïëàâàíèè - îñâîáîäèì ïàìÿòü è çàâåðøèì òðýä
			CloseHandle( p->thread );
			CloseHandle( p->event );
			SAFE_DELETE(p->queue);
			SAFE_DELETE(p);
			return 0;
		}
		// äîæäàëèñü ñîîáùåíèÿ â î÷åðåäè
		while( !p->thread_exit && p->queue && !p->queue->empty() ) {
			// îáðàáîòàåì ñîîáùåíèÿ èç î÷åðåäè
			if ( rsa_recv_thread(context, p->queue->front()) == -1 ) {
				// î÷èñòèòü î÷åðåäü
				clear_queue(p);
				break;
			}
			EnterCriticalSection(&localQueueMutex);
			p->queue->pop();
			LeaveCriticalSection(&localQueueMutex);
		}
	}
}


int __cdecl rsa_export_keypair(short mode, LPSTR privKey, LPSTR pubKey, LPSTR passPhrase) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_export_keypair: %d", mode);
#endif
	pCNTX ptr = get_context_on_id(hRSA4096);
	pRSAPRIV r = (pRSAPRIV) ptr->pdata;

	if ( pubKey ) {
		string pub;
		pub = tlv(3,r->pub_k) + tlv(4,r->pub_s);
		pub = pub_beg + crlf + add_delim(base64encode(pub),crlf,65) + pub_end + crlf;
		strcpy(pubKey, pub.c_str());
	}

	if ( privKey && passPhrase ) {
		string key = hash256(passPhrase);
		string iv = hash256(key);
		string priv = pad256(r->priv_k);

		string ciphered;
		try {
			CBC_Mode<AES>::Encryption enc((PBYTE)key.data(),key.length(),(PBYTE)iv.data());
			StreamTransformationFilter cbcEncryptor(enc,new StringSink(ciphered));
			cbcEncryptor.Put((PBYTE)priv.data(),priv.length());
			cbcEncryptor.MessageEnd();
		}
		catch (...) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
			Sent_NetLog("rsa_export_keypair: error bad_passphrase");
#endif
			return 0;
		}
		
		priv = tlv(1,ciphered) + tlv(2,::hash(ciphered));
		priv = priv_beg + crlf + add_delim(base64encode(priv),crlf,65) + priv_end + crlf;

		strcpy(privKey, priv.c_str());
	}

	return 1;
}


int __cdecl rsa_import_keypair(short mode, LPSTR privKey, LPSTR passPhrase) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_import_keypair: %d", mode);
#endif
	pCNTX ptr = get_context_on_id(hRSA4096);
	pRSAPRIV r = (pRSAPRIV) ptr->pdata;

	if ( !passPhrase ) return 0;

	string priv;
	u_int found;

	priv.assign(privKey);
	del_delim(priv,crlf);

	found = priv.find(priv_beg);
	if ( found != string::npos ) {
	    priv = priv.substr(found+priv_beg.length());
	    found = priv.find(priv_end);
	    if ( found != string::npos ) {
		priv = base64decode(priv.substr(0,found));
		TLV k(priv);
		if ( k.exist(1) && k.exist(2) && ::hash(k.get(1)) == k.get(2) ) {
		    priv = k.get(1);
		    
		    string key = hash256(passPhrase);
		    string iv = hash256(key);

		    string unciphered;
		    try {
			CBC_Mode<AES>::Decryption dec((PBYTE)key.data(),key.length(),(PBYTE)iv.data());
			StreamTransformationFilter cbcDecryptor(dec,new StringSink(unciphered));
			cbcDecryptor.Put((PBYTE)priv.data(),priv.length());
			cbcDecryptor.MessageEnd();
		    }
		    catch (...)	{
#if defined(_DEBUG) || defined(NETLIB_LOG)
			Sent_NetLog("rsa_import_keypair: error bad_passphrase");
#endif
			return 0;
		    }

		    init_priv(r,unciphered);
		    return 1;
		}
	    }
	}

	return 0;
}


int __cdecl rsa_export_pubkey(HANDLE context, LPSTR pubKey) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_export_pubkey: %08x", context);
#endif
	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);

	if ( !p->pub_k.length() || !pubKey ) return 0;

	string pub;
	pub = tlv(3,p->pub_k) + tlv(4,p->pub_s);
	pub = pub_beg + crlf + add_delim(base64encode(pub),crlf,65) + pub_end + crlf;
	strcpy(pubKey, pub.c_str());

	return 1;
}


int __cdecl rsa_import_pubkey(HANDLE context, LPSTR pubKey) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
	Sent_NetLog("rsa_import_pubkey: %08x", context);
#endif
	pCNTX ptr = get_context_on_id(context);	if (!ptr) return 0;
	pRSADATA p = (pRSADATA) cpp_alloc_pdata(ptr);

	if ( !pubKey ) return 0;

	string pub;
	u_int found;

	pub.assign(pubKey);
	del_delim(pub,crlf);

	found = pub.find(pub_beg);
	if ( found != string::npos ) {
	    pub = pub.substr(found+pub_beg.length());
	    found = pub.find(pub_end);
	    if ( found != string::npos ) {
		pub = base64decode(pub.substr(0,found));
		TLV k(pub);
		if ( k.exist(3) && k.exist(4) && ::hash(k.get(3)) == k.get(4) ) {
		    init_pub(p,k.get(3));
		    return 1;
		}
	    }	
	}	
	return 0;
}


// EOF