#include "globals.h"
#ifdef READER_NAGRA
#include "cscrypt/bn.h"
#include "cscrypt/idea.h"
#include "cscrypt/des.h"
#include "oscam-time.h"
#include "reader-common.h"
#include "reader-nagra-common.h"
#include "oscam-work.h"
#include "oscam-chk.h"

int8_t ins7e11_state = 0;

struct nagra_data
{
	IDEA_KEY_SCHEDULE ksSession;
	int8_t  is_pure_nagra;
	int8_t  is_tiger;
	int8_t  is_n3_na;
	int8_t  has_dt08;
	int8_t  swapCW;
	uint8_t ExpiryDate[2];
	uint8_t ActivationDate[2];
	uint8_t plainDT08RSA[64];
	uint8_t IdeaCamKey[16];
	uint8_t sessi[16];
	uint8_t signature[8];
	uint8_t ird_info;
	uint8_t cam_state[3];
};

// Card Status checks
#define HAS_CW()      ((csystem_data->cam_state[2]&6)==6)
#define RENEW_SESSIONKEY() ((csystem_data->cam_state[0]&128)==128 || (csystem_data->cam_state[0]&64)==64 || (csystem_data->cam_state[0]&32)==32 || (csystem_data->cam_state[2]&8)==8)
#define SENDDATETIME() (csystem_data->cam_state[0]&8)
// IRD Info
#define CW_NEEDS_3DES()	((csystem_data->ird_info&0x18)==0x18)
// Datatypes
#define DT01    0x01
#define IRDINFO 0x00
#define TIERS   0x05
#define DT06    0x06
#define CAMDATA 0x08

static time_t tier_date(uint32_t date, char *buf, int32_t l)
{
	time_t ut = 870393600L + date * (24 * 3600);
	if(buf)
	{
		struct tm t;
		t.tm_isdst = -1;
		cs_gmtime_r(&ut, &t);
		l = 27;
		snprintf(buf, l, "%04d/%02d/%02d", t.tm_year + 1900, t.tm_mon + 1, t.tm_mday);
	}
	return ut;
}

static char *nagra_datetime(struct s_reader *rdr, uint8_t *ndays, int32_t offset, char *result, time_t *t)
{
	struct nagra_data *csystem_data = rdr->csystem_data;
	struct tm tms;
	memset(&tms, 0, sizeof(tms));
	int32_t days = (ndays[0] << 8 | ndays[1]) + offset;
	int32_t sec = 0;

	if(!csystem_data->is_tiger)
	{
		sec = (ndays[2] << 8 | ndays[3]);
	}

	if(days > 0x41B4 && sizeof(time_t) < 8) // to overcome 32-bit systems limitations
	{
		days = 0x41A2; // 01-01-2038
	}

	tms.tm_year = 92;
	tms.tm_mday = days + 1;
	tms.tm_sec = sec;
	time_t ut = mktime(&tms);

	if(t)
	{
		*t = ut;
	}

	if(csystem_data->is_tiger)
	{
		snprintf(result, 27, "%02d/%02d/%04d", tms.tm_mday, tms.tm_mon + 1, tms.tm_year + 1900);
	}
	else
	{
		snprintf(result, 33, "%04d/%02d/%02d %02d:%02d", tms.tm_year + 1900, tms.tm_mon + 1, tms.tm_mday, tms.tm_hour, tms.tm_min);
	}
	return result;
}

static int32_t do_cmd(struct s_reader *reader, uint8_t cmd, int32_t ilen, uint8_t res, int32_t rlen, const uint8_t *data, uint8_t *cta_res, uint16_t *p_cta_lr)
{
	/*
	here we build the command related to the protocol T1 for ROM142 or T14 for ROM181
	the only different that i know is the command length byte msg[4], this msg[4]+=1 by a ROM181 smartcard (_nighti_)
	one example for the cmd$C0
	T14 protocol:       01 A0 CA 00 00 03 C0 00 06 91
	T1  protocol: 21 00 08 A0 CA 00 00 02 C0 00 06 87
	*/
	int32_t msglen = ilen + 6;
	uint8_t msg[msglen];
	static const char nagra_head[] = {0xA0, 0xCA, 0x00, 0x00};
	struct nagra_data *csystem_data = reader->csystem_data;

	memset(msg, 0, msglen);
	memcpy(msg, nagra_head, 4);
	msg[4] = ilen;
	msg[5] = cmd;
	int32_t dlen = ilen - 2;
	msg[6] = dlen;

	if(data && dlen > 0)
	{
		memcpy(msg + 7, data, dlen);
	}

	msg[dlen + 7] = rlen;
	if(dlen < 0)
	{
		rdr_log_dbg(reader, D_READER, "invalid data length encountered");
		return ERROR;
	}

	if(csystem_data->is_pure_nagra == 1)
	{
		msg[4] += 1;
	}

	if(!reader_cmd2icc(reader, msg, msglen, cta_res, p_cta_lr))
	{
		cs_sleepms(5);

		if(cta_res[0] != res)
		{
			rdr_log_dbg(reader, D_READER, "result not expected (%02x != %02x)", cta_res[0], res);
			return ERROR;
		}

		if((*p_cta_lr - 2) != rlen)
		{
			rdr_log_dbg(reader, D_READER, "result length expected (%d != %d)", (*p_cta_lr - 2), rlen);
			return ERROR;
		}
		return *p_cta_lr;
	}
	return ERROR;
}

static void ReverseMem(uint8_t *vIn, int32_t len)
{
	uint8_t temp;
	int32_t i;

	for(i = 0; i < (len / 2); i++)
	{
		temp = vIn[i];
		vIn[i] = vIn[len - i - 1];
		vIn[len - i - 1] = temp;
	}
}

static void Signature(uint8_t *sig, const uint8_t *vkey, const uint8_t *msg, int32_t len)
{
	IDEA_KEY_SCHEDULE ks;
	uint8_t v[8];
	uint8_t b200[16];
	uint8_t b0f0[8];
	memcpy(b200, vkey, sizeof(b200));
	int32_t i;
	int32_t j;

	for(i = 0; i < len; i += 8)
	{
		idea_set_encrypt_key(b200, &ks);
		memset(v, 0, sizeof(v));
		idea_cbc_encrypt(msg + i, b0f0, 8, &ks, v, IDEA_DECRYPT);

		for(j = 7; j >= 0; j--)
		{
			b0f0[j] ^= msg[i + j];
		}
		memcpy(b200 + 0, b0f0, 8);
		memcpy(b200 + 8, b0f0, 8);
	}
	memcpy(sig, b0f0, 8);
	return;
}

static int32_t CamStateRequest(struct s_reader *reader)
{
	def_resp;
	struct nagra_data *csystem_data = reader->csystem_data;
	char tmp_dbg[10];

	if(do_cmd(reader, 0xC0, 0x02, 0xB0, 0x06, NULL, cta_res, &cta_lr))
	{
		csystem_data->ird_info = cta_res[2];
		rdr_log_dbg(reader, D_READER, "Irdinfo: %02X", csystem_data->ird_info);
		memcpy(csystem_data->cam_state, cta_res + 3, 3);
		rdr_log_dbg(reader, D_READER, "Camstate: %s", cs_hexdump(1, csystem_data->cam_state, 3, tmp_dbg, sizeof(tmp_dbg)));
	}
	else
	{
		rdr_log_dbg(reader, D_READER, "CamStateRequest failed");
		return ERROR;
	}
	return OK;
}

static void DateTimeCMD(struct s_reader *reader)
{
	def_resp;
	if(!do_cmd(reader, 0xC8, 0x02, 0xB8, 0x06, NULL, cta_res, &cta_lr))
	{
		rdr_log_dbg(reader, D_READER, "DateTimeCMD failed!");
	}

}

static int32_t NegotiateSessionKey_Tiger(struct s_reader *reader)
{
	def_resp;
	uint8_t exponent = 0x11;
	uint8_t parte_fija[120];
	uint8_t parte_variable[88];
	uint8_t d1_rsa_modulo[88];
	uint8_t d2_data[88];
	uint8_t sign1[8];
	uint8_t sk[16];
	uint8_t tmp[104];
	uint8_t idea_key[16];
	uint8_t rnd[88];
	char tmp2[17];
	struct nagra_data *csystem_data = reader->csystem_data;

	if(!do_cmd(reader, 0xd1, 0x02, 0x51, 0xd2, NULL, cta_res, &cta_lr))
	{
		rdr_log_dbg(reader, D_READER, "CMD$D1 failed");
		return ERROR;
	}

	BN_CTX *ctx = BN_CTX_new();
#ifdef WITH_LIBCRYPTO
	BN_CTX_start(ctx);
#endif
	BIGNUM *bnN = BN_CTX_get(ctx);
	BIGNUM *bnE = BN_CTX_get(ctx);
	BIGNUM *bnCT = BN_CTX_get(ctx);
	BIGNUM *bnPT = BN_CTX_get(ctx);
	BN_bin2bn(reader->rsa_mod, 120, bnN);
	BN_bin2bn(&exponent, 1, bnE);
	BN_bin2bn(&cta_res[90], 120, bnCT);
	BN_mod_exp(bnPT, bnCT, bnE, bnN, ctx);
	memset(parte_fija, 0, 120);
	BN_bn2bin(bnPT, parte_fija + (120 - BN_num_bytes(bnPT)));
	BN_CTX_end(ctx);
	BN_CTX_free(ctx);

	rdr_log_dbg(reader, D_READER, "---------- SIG CHECK ---------------------");
	memset(tmp, 0, 104);
	memcpy(tmp + 4, parte_fija + 11, 100);
	memset(idea_key, 0x37, 16);
	Signature(sign1, idea_key, tmp, 104);
	rdr_log_dbg(reader, D_READER, "sign1: %s", cs_hexdump(0, sign1, 8, tmp2, sizeof(tmp2)));
	rdr_log_dbg(reader, D_READER, "sign2: %s", cs_hexdump(0, parte_fija + 111, 8, tmp2, sizeof(tmp2)));

	if((!memcmp(parte_fija + 111, sign1, 8)) == 0)
	{
		rdr_log_dbg(reader, D_READER, "signature check nok");
		rdr_log_dbg(reader, D_READER, "------------------------------------------");
		return ERROR;
	}
	rdr_log_dbg(reader, D_READER, "signature check ok");
	rdr_log_dbg(reader, D_READER, "------------------------------------------");

	memcpy(reader->hexserial + 2, parte_fija + 15, 4);
	memcpy(reader->sa[0], parte_fija + 15, 3);

	memcpy(reader->irdId, parte_fija + 19, 4);
	memcpy(d1_rsa_modulo, parte_fija + 23, 88);

	ReverseMem(cta_res + 2, 88);
	BN_CTX *ctx1 = BN_CTX_new();
#ifdef WITH_LIBCRYPTO
	BN_CTX_start(ctx1);
#endif
	BIGNUM *bnN1 = BN_CTX_get(ctx1);
	BIGNUM *bnE1 = BN_CTX_get(ctx1);
	BIGNUM *bnCT1 = BN_CTX_get(ctx1);
	BIGNUM *bnPT1 = BN_CTX_get(ctx1);
	BN_bin2bn(d1_rsa_modulo, 88, bnN1);
	BN_bin2bn(&exponent, 1, bnE1);
	BN_bin2bn(cta_res + 2, 88, bnCT1);
	BN_mod_exp(bnPT1, bnCT1, bnE1, bnN1, ctx1);
	memset(parte_variable, 0, 88);
	BN_bn2bin(bnPT1, parte_variable + (88 - BN_num_bytes(bnPT1)));
	BN_CTX_end(ctx1);
	BN_CTX_free(ctx1);

	csystem_data->ActivationDate[0] = parte_variable[65];
	csystem_data->ActivationDate[1] = parte_variable[66];
	csystem_data->ExpiryDate[0] = parte_variable[69];
	csystem_data->ExpiryDate[1] = parte_variable[70];

	reader->prid[0][0] = 0x00;
	reader->prid[0][1] = 0x00;
	reader->prid[0][2] = parte_variable[73];
	reader->prid[0][3] = parte_variable[74];
	reader->caid = (SYSTEM_NAGRA | parte_variable[76]);
	memcpy(sk, &parte_variable[79], 8);
	memset(sk + 8, 0xBB, 8);
	rdr_log_sensitive(reader, "type: NAGRA, caid: %04X, IRD ID: {%s}", reader->caid, cs_hexdump(1, reader->irdId, 4, tmp2, sizeof(tmp2)));
	rdr_log(reader, "ProviderID: %s", cs_hexdump(1, reader->prid[0], 4, tmp2, sizeof(tmp2)));

	memcpy(rnd, sk, 8);
	memset(&rnd[8], 0xBB, 79);
	rnd[87] = 0x6B;
	ReverseMem(rnd, 88);


	BN_CTX *ctx3 = BN_CTX_new();
#ifdef WITH_LIBCRYPTO
	BN_CTX_start(ctx3);
#endif
	BIGNUM *bnN3 = BN_CTX_get(ctx3);
	BIGNUM *bnE3 = BN_CTX_get(ctx3);
	BIGNUM *bnCT3 = BN_CTX_get(ctx3);
	BIGNUM *bnPT3 = BN_CTX_get(ctx3);
	BN_bin2bn(d1_rsa_modulo, 88, bnN3);
	BN_bin2bn(&exponent, 1, bnE3);
	BN_bin2bn(rnd, 88, bnCT3);
	BN_mod_exp(bnPT3, bnCT3, bnE3, bnN3, ctx3);
	memset(d2_data, 0, 88);
	BN_bn2bin(bnPT3, d2_data + (88 - BN_num_bytes(bnPT3)));
	BN_CTX_end(ctx3);
	BN_CTX_free(ctx3);
	ReverseMem(d2_data, 88);

	if(!do_cmd(reader, 0xd2, 0x5a, 0x52, 0x03, d2_data, cta_res, &cta_lr))
	{
		rdr_log_dbg(reader, D_READER, "CMD$D2 failed");
		return ERROR;
	}

	if(cta_res[2] == 0x00)
	{
		memcpy(csystem_data->sessi, sk, 16);
		IDEA_KEY_SCHEDULE ks;
		idea_set_encrypt_key(csystem_data->sessi, &ks);
		idea_set_decrypt_key(&ks, &csystem_data->ksSession);
		rdr_log_dbg(reader, D_READER, "Tiger session key negotiated");
		return OK;
	}

	rdr_log(reader, "Negotiate sessionkey was not successful! Please check tivusat rsa key");
	return ERROR;
}

static int32_t NegotiateSessionKey(struct s_reader *reader)
{
	def_resp;
	uint8_t negot[64];
	uint8_t cmd2b[] = {
		0x21, 0x40, 0x4D, 0xA0, 0xCA, 0x00, 0x00, 0x47, 0x27, 0x45,
		0x1C, 0x54, 0xd1, 0x26, 0xe7, 0xe2, 0x40, 0x20,
		0xd1, 0x66, 0xf4, 0x18, 0x97, 0x9d, 0x5f, 0x16,
		0x8f, 0x7f, 0x7a, 0x55, 0x15, 0x82, 0x31, 0x14,
		0x06, 0x57, 0x1a, 0x3f, 0xf0, 0x75, 0x62, 0x41,
		0xc2, 0x84, 0xda, 0x4c, 0x2e, 0x84, 0xe9, 0x29,
		0x13, 0x81, 0xee, 0xd6, 0xa9, 0xf5, 0xe9, 0xdb,
		0xaf, 0x22, 0x51, 0x3d, 0x44, 0xb3, 0x20, 0x83,
		0xde, 0xcb, 0x5f, 0x35, 0x2b, 0xb0, 0xce, 0x70,
		0x01, 0x02, 0x03, 0x04, //IRD nr
		0x00 };//keynr

	uint8_t cmd2a[] = {
		0x00,
		0xA5, 0xFB, 0x02, 0x76,	//NUID
		0x00, 0x08,		//OTP-CSC
		0x00, 0x00,		//OTA-CSC
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00,
		0x22, 0x11 }; //Provider ID

	uint8_t tmp[64];
	uint8_t idea1[16];
	uint8_t idea2[16];
	uint8_t sign1[8];
	uint8_t sign2[8];
	struct nagra_data *csystem_data = reader->csystem_data;

	if(csystem_data->is_tiger)
	{
		if(!NegotiateSessionKey_Tiger(reader))
		{
			rdr_log_dbg(reader, D_READER, "NegotiateSessionKey_Tiger failed");
			return ERROR;
		}
		return OK;
	}

	if(!csystem_data->has_dt08)  // if we have no valid dt08 calc then we use rsa from config and hexserial for calc of sessionkey
	{
		rdr_log_dbg(reader, D_READER, "No valid DT08 calc using rsa from config and serial from card");
		memcpy(csystem_data->plainDT08RSA, reader->rsa_mod, 64);
		memcpy(csystem_data->signature, reader->boxkey, 8);
	}

	if((csystem_data->is_n3_na) && (!do_cmd(reader, 0x29, 0x02, 0xA9, 0x04, NULL, cta_res, &cta_lr)))
	{
		rdr_log_dbg(reader, D_READER, "Nagra3: CMD$29 failed");
		return ERROR;
	}

	memcpy(tmp, reader->irdId, 4);
	tmp[4] = 0; //keynr 0

	if(!csystem_data->is_n3_na)
	{
		if (reader->cak63nuid_length == 4) //nuid is set
		{
			// inject provid
			cmd2a[26] = reader->prid[0][2];
			cmd2a[27] = reader->prid[0][3];

			memcpy(&cmd2a[1], reader->cak63nuid, 4); // inject NUID

			if (!do_cmd(reader, 0x2a,0x1E,0xAA,0x42, cmd2a, cta_res, &cta_lr))
			{
				rdr_log_dbg(reader, D_READER, "CMD$2A failed");
				return ERROR;
			}
		}
		else
		{
			if(!do_cmd(reader, 0x2a, 0x02, 0xaa, 0x42, NULL, cta_res, &cta_lr))
			{
				rdr_log_dbg(reader, D_READER, "CMD$2A failed");
				return ERROR;
			}

		}
	}
	else if(!do_cmd(reader, 0x26, 0x07, 0xa6, 0x42, tmp, cta_res, &cta_lr))
	{
		rdr_log_dbg(reader, D_READER, "CMD$26 failed");
		return ERROR;
	}

	// RSA decrypt of cmd$2a data, result is stored in "negot"
	ReverseMem(cta_res + 2, 64);
	uint8_t vFixed[] = {0, 1, 2, 3};
	BN_CTX *ctx = BN_CTX_new();
#ifdef WITH_LIBCRYPTO
	BN_CTX_start(ctx);
#endif
	BIGNUM *bnN = BN_CTX_get(ctx);
	BIGNUM *bnE = BN_CTX_get(ctx);
	BIGNUM *bnCT = BN_CTX_get(ctx);
	BIGNUM *bnPT = BN_CTX_get(ctx);
	BN_bin2bn(csystem_data->plainDT08RSA, 64, bnN);
	BN_bin2bn(vFixed + 3, 1, bnE);
	BN_bin2bn(cta_res + 2, 64, bnCT);
	BN_mod_exp(bnPT, bnCT, bnE, bnN, ctx);
	memset(negot, 0, 64);
	BN_bn2bin(bnPT, negot + (64 - BN_num_bytes(bnPT)));

	memcpy(tmp, negot, 64);
	ReverseMem(tmp, 64);

	// build sessionkey
	// first halve is IDEA Hashed in chuncs of 8 bytes using the Signature1 from dt08 calc, CamID-Inv.CamID(16 bytes key) the results are the First 8 bytes of the Session key
	memcpy(idea1, csystem_data->signature, 8);
	memcpy(idea1 + 8, reader->hexserial + 2, 4);
	idea1[12] = ~reader->hexserial[2];
	idea1[13] = ~reader->hexserial[3];
	idea1[14] = ~reader->hexserial[4];
	idea1[15] = ~reader->hexserial[5];

	Signature(sign1, idea1, tmp, 32);
	memcpy(idea2, sign1, 8);
	memcpy(idea2 + 8, sign1, 8);
	Signature(sign2, idea2, tmp, 32);
	memcpy(csystem_data->sessi, sign1, 8);
	memcpy(csystem_data->sessi + 8, sign2, 8);

	// prepare cmd$2b data
	BN_bin2bn(negot, 64, bnCT);
	BN_mod_exp(bnPT, bnCT, bnE, bnN, ctx);
	memset(cmd2b + 10, 0, 64);
	BN_bn2bin(bnPT, cmd2b + 10 + (64 - BN_num_bytes(bnPT)));
	BN_CTX_end(ctx);
	BN_CTX_free(ctx);
	ReverseMem(cmd2b + 10, 64);

	IDEA_KEY_SCHEDULE ks;
	idea_set_encrypt_key(csystem_data->sessi, &ks);
	idea_set_decrypt_key(&ks, &csystem_data->ksSession);

	memcpy(cmd2b + 74, reader->irdId, 4);
	cmd2b[78] = 0; //keynr

	if(!csystem_data->is_n3_na)
	{
		if(!do_cmd(reader, 0x2b, 0x42, 0xab, 0x02, cmd2b + 10, cta_res, &cta_lr))
		{
			rdr_log_dbg(reader, D_READER, "CMD$2B failed");
			return ERROR;
		}
	}
	else if(!do_cmd(reader, 0x27, 0x47, 0xa7, 0x02, cmd2b + 10, cta_res, &cta_lr))
	{
		rdr_log_dbg(reader, D_READER, "CMD$27 failed");
		return ERROR;
	}

	rdr_log_dbg(reader, D_READER, "session key negotiated");

	DateTimeCMD(reader);

	if(!CamStateRequest(reader))
	{
		rdr_log_dbg(reader, D_READER, "CamStateRequest failed");
		return ERROR;
	}

	if RENEW_SESSIONKEY()
	{
		rdr_log(reader, "Negotiate sessionkey was not successful! Please check rsa key and boxkey");
		return ERROR;
	}

	return OK;
}

static void decryptDT08(struct s_reader *reader, uint8_t *cta_res)
{
	uint8_t vFixed[] = {0, 1, 2, 3};
	uint8_t v[72];
	uint8_t buf[72];
	uint8_t sign2[8];
	uint8_t static_dt08[73];
	uint8_t camid[4];
	char tmp_dbg[13];
	int32_t i, n;
	BN_CTX *ctx;
	BIGNUM *bn_mod, *bn_exp, *bn_data, *bn_res;
	struct nagra_data *csystem_data = reader->csystem_data;

	memcpy(static_dt08, &cta_res[12], 73);
	// decrypt RSA Part of dt08
	bn_mod = BN_new();
	bn_exp = BN_new();
	bn_data = BN_new();
	bn_res = BN_new();
	ctx = BN_CTX_new();

	if(ctx == NULL)
	{
		rdr_log_dbg(reader, D_READER, "RSA Error in dt08 decrypt");
	}
	ReverseMem(static_dt08 + 1, 64);
	BN_bin2bn(reader->rsa_mod, 64, bn_mod); // rsa modulus
	BN_bin2bn(vFixed + 3, 1, bn_exp); // exponent
	BN_bin2bn(static_dt08 + 1, 64, bn_data);
	BN_mod_exp(bn_res, bn_data, bn_exp, bn_mod, ctx);
	memset(static_dt08 + 1, 0, 64);
	n = BN_bn2bin(bn_res, static_dt08 + 1);
	BN_CTX_free(ctx);
	ReverseMem(static_dt08 + 1, n);

	// RSA data can never be bigger than the modulo
	static_dt08[64] |= static_dt08[0] & 0x80;

	// IdeaCamKey
	memcpy(&csystem_data->IdeaCamKey[0], reader->boxkey, 8);
	memcpy(&csystem_data->IdeaCamKey[8], reader->irdId, 4);

	for(i = 0; i < 4; i++)
	{
		csystem_data->IdeaCamKey[12 + i] = ~reader->irdId[i];
	}

	// now IDEA decrypt
	IDEA_KEY_SCHEDULE ks;
	idea_set_encrypt_key(csystem_data->IdeaCamKey, &ks);
	idea_set_decrypt_key(&ks, &csystem_data->ksSession);
	memcpy(&buf[0], static_dt08 + 1, 64);
	memcpy(&buf[64], static_dt08 + 65, 8);
	memset(v, 0, sizeof(v));
	memset(static_dt08, 0, sizeof(static_dt08));
	idea_cbc_encrypt(buf, static_dt08, 72, &csystem_data->ksSession, v, IDEA_DECRYPT);

	if(csystem_data->swapCW == 1)
	{
		memset(camid, 0xff, 4);
	}
	else
	{
		memcpy(camid, reader->hexserial + 2, 4);
	}
	rdr_log_dbg(reader, D_READER, "using camid %s for dt08 calc", cs_hexdump(1, camid, 4, tmp_dbg, sizeof(tmp_dbg)));

	// Calculate csystem_data->signature
	memcpy(csystem_data->signature, static_dt08, 8);
	memset(static_dt08 + 0, 0, 4);
	memcpy(static_dt08 + 4, camid, 4);
	Signature(sign2, csystem_data->IdeaCamKey, static_dt08, 72);

	if(memcmp(csystem_data->signature, sign2, 8) == 0)
	{
		csystem_data->has_dt08 = 1;
		memcpy(csystem_data->plainDT08RSA, static_dt08 + 8, 64);
		rdr_log_dbg(reader, D_READER, "DT08 signature check ok");
	}
	else
	{
		csystem_data->has_dt08 = 0;
		rdr_log_dbg(reader, D_READER, "DT08 signature check nok");
	}

	BN_free(bn_mod);
	BN_free(bn_exp);
	BN_free(bn_data);
	BN_free(bn_res);
}

static void addProvider(struct s_reader *reader, uint8_t *cta_res)
{
	int32_t i;
	int32_t toadd = 1;
	for(i = 0; i < reader->nprov; i++)
	{
		if((cta_res[7] == reader->prid[i][2]) && (cta_res[8] == reader->prid[i][3]))
		{
			toadd = 0;
		}
	}

	if(toadd)
	{
		reader->prid[reader->nprov][0] = 0;
		reader->prid[reader->nprov][1] = 0;
		reader->prid[reader->nprov][2] = cta_res[7];
		reader->prid[reader->nprov][3] = cta_res[8];
		memcpy(reader->sa[reader->nprov], reader->sa[0], 4);
		reader->nprov += 1;
	}
}

static int32_t ParseDataType(struct s_reader *reader, uint8_t dt, uint8_t *cta_res, uint16_t cta_lr)
{
	struct nagra_data *csystem_data = reader->csystem_data;
	char ds[20], de[16];
	uint16_t chid;

	switch(dt)
	{
		case IRDINFO:
		{
			reader->prid[0][0] = 0;
			reader->prid[0][1] = 0;
			reader->prid[0][2] = cta_res[7];
			reader->prid[0][3] = cta_res[8];

			// provider 3411, 0401 needs cw swap
			if(((cta_res[7] == 0x34) && (cta_res[8] == 0x11)) || ((cta_res[7] == 0x04) && (cta_res[8] == 0x01)))
			{
				rdr_log_dbg(reader, D_READER, "detect provider with swap cw!");
				csystem_data->swapCW = 1;
			}

			reader->prid[1][0] = 0x00;
			reader->prid[1][1] = 0x00;
			reader->prid[1][2] = 0x00;
			reader->prid[1][3] = 0x00;
			memcpy(reader->sa[1], reader->sa[0], 4);
			reader->nprov += 1;

			reader->caid = (SYSTEM_NAGRA | cta_res[11]);
			memcpy(reader->irdId, cta_res + 14, 4);

			// do not output on init but only afterwards in card_info
			if(reader->csystem_active)
			{
				rdr_log_sensitive(reader, "IRD ID: {%s}", cs_hexdump(1, reader->irdId, 4, ds, sizeof(ds)));
				nagra_datetime(reader, cta_res + 24, 0, ds, &reader->card_valid_to);
				rdr_log(reader, "active to: %s", ds);
			}
			return OK;
		}

		case TIERS:
			if((cta_lr > 33) && (chid = b2i(2, cta_res + 11)))
			{
				int32_t id = (cta_res[7] * 256) | cta_res[8];
				int32_t expire_date1 = b2i(2, cta_res + 13);
				int32_t expire_date2 = b2i(2, cta_res + 24);
				int32_t sooner_expire_date = expire_date1 <= expire_date2 ? expire_date1 : expire_date2;
				// todo: add entitlements to list
				cs_add_entitlement(reader, reader->caid, id, chid, 0, tier_date(b2i(2, cta_res + 20) - 0x7f7, ds, 15), tier_date(sooner_expire_date - 0x7f7, de, 15), 4, 1);
				rdr_log(reader, "|%04X|%04X    |%s  |%s  |", id, chid, ds, de);
				addProvider(reader, cta_res);
			}
			return OK;

		case 0x08:
		case 0x88:
			if(cta_res[11] == 0x49)
			{
				decryptDT08(reader, cta_res);
			}
			return OK;

		default:
			return OK;
	}
	return ERROR;
}

static int32_t GetDataType(struct s_reader *reader, uint8_t dt, int32_t len)
{
	def_resp;
	int32_t result = OK;

	while(result == OK)
	{
		if(!do_cmd(reader, 0x22, 0x03, 0xA2, len, &dt, cta_res, &cta_lr))
		{
			rdr_log_dbg(reader, D_READER, "failed to get datatype %02X", dt);
			result = ERROR;
			break;
		}

		if((cta_res[2] == 0) && ((dt&0x80) == 0x80))
		{
			result = OK;
			break;
		}

		if(!ParseDataType(reader, dt & 0x0F, cta_res, cta_lr))
		{
			result = ERROR;
			break;
		}

		if(((dt&0x0F) != TIERS) && (cta_res[11] == 0x49) && ((dt&0x80) == 0x80))
		{
			result = OK;
			break;
		}
		dt |= 0x80; // get next item
	}
	return result;
}

static int32_t nagra2_card_init(struct s_reader *reader, ATR *newatr)
{
	get_atr;
	def_resp;
	memset(reader->rom, 0, 15);
	static const uint8_t ins80[] = { 0x80, 0xCA, 0x00, 0x00, 0x11 }; // switch to nagra layer
	static const uint8_t handshake[] = { 0xEE, 0x51, 0xDC, 0xB8, 0x4A, 0x1C, 0x15, 0x05, 0xB5, 0xA6, 0x9B, 0x91, 0xBA, 0x33, 0x19, 0xC4, 0x10 }; // nagra handshake

	int8_t is_pure_nagra = 0;
	int8_t is_tiger = 0;
	int8_t is_n3_na = 0;
	memset(reader->irdId, 0xff, 4);
	memset(reader->hexserial, 0, 8);

	cs_clear_entitlement(reader); // reset the entitlements

	if(memcmp(atr + 11, "DNASP240", 8) == 0 || memcmp(atr + 11, "DNASP241", 8) == 0)
	{
		rdr_log(reader, "detect nagra 3 NA card");
		memcpy(reader->rom, atr + 11, 15);
		is_n3_na = 1;
	}
	else if((memcmp(atr + 11, "DNASP", 5) == 0) && (memcmp(atr + 11, "DNASP4", 6) != 0))
	{
		rdr_log(reader, "detect native nagra card");
		memcpy(reader->rom, atr + 11, 15);
	}
	else if(memcmp(atr + 11, "TIGER", 5) == 0 || (memcmp(atr + 11, "NCMED", 5) == 0))
	{
		rdr_log(reader, "detect nagra tiger card");
		memcpy(reader->rom, atr + 11, 15);
		is_tiger = 1;
	}
	else if((!memcmp(atr + 4, "IRDETO", 6)) && ((atr[14] == 0x03) && (atr[15] == 0x84) && (atr[16] == 0x55)))
	{
		rdr_log(reader, "detect irdeto tunneled nagra card");
		if(!array_has_nonzero_byte(reader->rsa_mod, 64))
		{
			rdr_log(reader, "no rsa key configured -> using irdeto mode");
			return ERROR;
		}

		if(reader->force_irdeto)
		{
			rdr_log(reader, "rsa key configured but irdeto mode forced -> using irdeto mode");
			return ERROR;
		}

		rdr_log(reader, "rsa key configured -> using nagra mode");
		is_pure_nagra = 1;

		if(!cs_malloc(&reader->csystem_data, sizeof(struct nagra_data)))
		{
			return ERROR;
		}

		struct nagra_data *csystem_data = reader->csystem_data;
		csystem_data->is_pure_nagra = is_pure_nagra;

		if(!do_cmd(reader, 0x10, 0x02, 0x90, 0x11, 0, cta_res, &cta_lr))
		{
			rdr_log_dbg(reader, D_READER, "get rom version failed");
			return ERROR;
		}
		memcpy(reader->rom, cta_res + 2, 15);
	}
	else if(!reader->cak7_mode && reader->detect_seca_nagra_tunneled_card && memcmp(atr + 7, "pp", 2) == 0 && ((atr[9]&0x0F) >= 10))
	{
		rdr_log(reader, "detect seca/nagra tunneled card");

		if(!cs_malloc(&reader->csystem_data, sizeof(struct nagra_data)))
		{
			rdr_log(reader,"mem alloc error"); return ERROR;
		}

		if(!card_write(reader, ins80, handshake, cta_res, &cta_lr)) // try to init nagra layer
		{
			if(cta_res[0] == 0x61 && cta_res[1] == 0x10)
			{
				reader->seca_nagra_card = 1;
				if ((reader->typ == R_SMART || reader->typ == R_INTERNAL || is_smargo_reader(reader)) && !reader->ins7e11_fast_reset)
				{
					ins7e11_state = 1;
					reader->ins7e11_fast_reset = 1;
				}

				reader->card_atr_length = 23;
				const struct s_cardreader *crdr_ops = reader->crdr;

				if (!crdr_ops)
				{
					return ERROR;
				}

				call(crdr_ops->activate(reader, newatr)); // read nagra atr
				get_atr2;
				memcpy(reader->rom, atr2 + 8, 15); // get historical bytes containing romrev from nagra atr
				rdr_log(reader,"Nagra layer found");
				rdr_log(reader,"Rom revision: %.15s", reader->rom);
				reader->card_atr_length = 14;
				reader->seca_nagra_card = 2;
				call(crdr_ops->activate(reader, newatr)); // read seca atr to switch back

				if ((reader->typ == R_SMART || reader->typ == R_INTERNAL || is_smargo_reader(reader)) && ins7e11_state == 1)
				{
					ins7e11_state = 0;
					reader->ins7e11_fast_reset = 0;
				}
			}
			else
			{
				rdr_log(reader," Nagra atr not ok");
				return ERROR;
			}
		}
		NULLFREE(reader->csystem_data);
		return ERROR; // quitting csystem still not having needed commands to run on nagra layer
	}
	else
	{
		return ERROR;
	}

	// Private data may be already allocated, see above (the irdeto check).
	if(!reader->csystem_data)
	{
		if(!cs_malloc(&reader->csystem_data, sizeof(struct nagra_data)))
		{
			return ERROR;
		}
	}

	struct nagra_data *csystem_data = reader->csystem_data;
	csystem_data->is_pure_nagra = is_pure_nagra;
	csystem_data->is_tiger = is_tiger;
	csystem_data->is_n3_na = is_n3_na;

	reader->nprov = 1;

	if(!csystem_data->is_tiger)
	{
		CamStateRequest(reader);
		if(!do_cmd(reader, 0x12, 0x02, 0x92, 0x06, 0, cta_res, &cta_lr))
		{
			rdr_log_dbg(reader, D_READER, "get serial failed");
			return ERROR;
		}
		memcpy(reader->hexserial + 2, cta_res + 2, 4);
		memcpy(reader->sa[0], cta_res + 2, 3);

		if(!GetDataType(reader, DT01, 0x0E))
		{
			return ERROR;
		}
		rdr_log_dbg(reader, D_READER, "DT01 DONE");
		CamStateRequest(reader);
		if(!GetDataType(reader, IRDINFO, 0x39))
		{
			return ERROR;
		}
		rdr_log_dbg(reader, D_READER, "IRDINFO DONE");
		CamStateRequest(reader);
		if(!GetDataType(reader, CAMDATA, 0x55))
		{
			return ERROR;
		}
		rdr_log_dbg(reader, D_READER, "CAMDATA Done");
		if(!GetDataType(reader, 0x04, 0x44))
		{
			return ERROR;
		}
		rdr_log_dbg(reader, D_READER, "DT04 DONE");
		CamStateRequest(reader);
		if(!GetDataType(reader, DT06, 0x16))
		{
			return ERROR;
		}
		rdr_log_dbg(reader, D_READER, "DT06 DONE");
		CamStateRequest(reader);
	}

	if(!NegotiateSessionKey(reader))
	{
		rdr_log_dbg(reader, D_READER, "NegotiateSessionKey failed");
		return ERROR;
	}
	rdr_log(reader, "ready for requests");
	return OK;
}

typedef struct
{
	char date1[11];
	char date2[11];
	uint8_t type;
	uint16_t value;
	uint16_t price;
} ncmed_rec;

static time_t tiger_date2time(const char *date)
{
	struct tm timeinfo;
	int32_t y, m, d;

	sscanf(date, "%02d/%02d/%04d", &d, &m, &y);
	memset(&timeinfo, 0, sizeof(struct tm));
	timeinfo.tm_year = y - 1900;
	timeinfo.tm_mon = m - 1;
	timeinfo.tm_mday = d;

	return mktime(&timeinfo);
}

static int32_t reccmp(const void *r1, const void *r2)
{
	int32_t v1, v2, y, m, d;
	sscanf(((ncmed_rec *)r1)->date1, "%02d/%02d/%04d", &d, &m, &y);
	v1 = y * 372 + 1 + m * 31 + d;
	sscanf(((ncmed_rec *)r2)->date1, "%02d/%02d/%04d", &d, &m, &y);
	v2 = y * 372 + 1 + m * 31 + d;
	return (v1 == v2) ? 0 : (v1 < v2) ? -1 : 1;
}

static int32_t reccmp2(const void *r1, const void *r2)
{
	char rec1[13], rec2[13];
	snprintf(rec1, sizeof(rec1), "%04X", ((ncmed_rec *)r1)->value);
	memcpy(rec1 + 4, ((ncmed_rec *)r1)->date2 + 6, 4);
	memcpy(rec1 + 8, ((ncmed_rec *)r1)->date2 + 3, 2);
	memcpy(rec1 + 10, ((ncmed_rec *)r1)->date2, 2);
	snprintf(rec2, sizeof(rec2), "%04X", ((ncmed_rec *)r2)->value);
	memcpy(rec2 + 4, ((ncmed_rec *)r2)->date2 + 6, 4);
	memcpy(rec2 + 8, ((ncmed_rec *)r2)->date2 + 3, 2);
	memcpy(rec2 + 10, ((ncmed_rec *)r2)->date2, 2);
	rec1[12] = rec2[12] = 0;
	return strcmp(rec2, rec1);
}

static int32_t nagra2_card_info(struct s_reader *reader)
{
	int32_t i;
	char currdate[27], tmp[64];
	struct nagra_data *csystem_data = reader->csystem_data;
	rdr_log(reader, "ROM:    %c %c %c %c %c %c %c %c", reader->rom[0], reader->rom[1], reader->rom[2], reader->rom[3], reader->rom[4], reader->rom[5], reader->rom[6], reader->rom[7]);
	rdr_log(reader, "REV:    %c %c %c %c %c %c", reader->rom[9], reader->rom[10], reader->rom[11], reader->rom[12], reader->rom[13], reader->rom[14]);
	rdr_log_sensitive(reader, "SER:    {%s}", cs_hexdump(1, reader->hexserial + 2, 4, tmp, sizeof(tmp)));
	rdr_log(reader, "CAID:   %04X", reader->caid);
	rdr_log(reader, "Prv.ID: %s(sysid)", cs_hexdump(1, reader->prid[0], 4, tmp, sizeof(tmp)));

	for(i = 1; i < reader->nprov; i++)
	{
		rdr_log(reader, "Prv.ID: %s", cs_hexdump(1, reader->prid[i], 4, tmp, sizeof(tmp)));
	}
	cs_clear_entitlement(reader); // reset the entitlements

	if(csystem_data->is_tiger)
	{
		rdr_log(reader, "Activation Date : %s", nagra_datetime(reader, csystem_data->ActivationDate, 0, currdate, 0));
		rdr_log(reader, "Expiry Date : %s", nagra_datetime(reader, csystem_data->ExpiryDate, 0, currdate, &reader->card_valid_to));
	}

	if(reader->nagra_read && csystem_data->is_tiger && (memcmp(reader->rom, "NCMED", 5) == 0 || memcmp(reader->rom, "TIGER", 5) == 0))
	{
		ncmed_rec records[255];
		int32_t num_records = 0;
		uint8_t tier_cmd1[] = { 0x00, 0x00 };
		uint8_t tier_cmd2[] = { 0x01, 0x00 };
		def_resp;
		int32_t j;
		do_cmd(reader, 0xD0, 0x04, 0x50, 0x0A, tier_cmd1, cta_res, &cta_lr);

		if(cta_lr == 0x0C)
		{
			int32_t prepaid = 0;
			int32_t credit = 0;
			int32_t balance = 0;

			uint16_t credit_in = cta_res[8] << 8 | cta_res[9];
			uint16_t credit_out = cta_res[5] << 8 | cta_res[6];
			balance = (credit_in - credit_out) / 100;

			for(i = 0; i < 13; ++i)
			{
				tier_cmd2[1] = i;
				do_cmd(reader, 0xD0, 0x04, 0x50, 0xAA, tier_cmd2, cta_res, &cta_lr);
				if(cta_lr == 0xAC)
				{
					//rdr_log_dump(reader, cta_res, cta_lr, "NCMED Card Record %d", i+1);
					for(j = 2; j < cta_res[1] - 14; ++j)
					{
						if(cta_res[j] == 0x80 && cta_res[j + 6] != 0x00)
						{
							int32_t val_offs = 0;
							nagra_datetime(reader, &cta_res[j + 6], 0, records[num_records].date2, 0);

							switch(cta_res[j + 1])
							{
								case 0x00:
								case 0x01:
								case 0x20:
								case 0x21:
								case 0x29:
									nagra_datetime(reader, &cta_res[j + 8], 0, records[num_records].date1, 0);
									val_offs = 1;
									break;

								case 0x80:
									nagra_datetime(reader, &cta_res[j + 6], 0, records[num_records].date1, 0);
									val_offs = 1;
									break;

								default:
									rdr_log(reader, "Unknown record : %s", cs_hexdump(1, &cta_res[j], 17, tmp, sizeof(tmp)));
							}

							if(val_offs > 0)
							{
								records[num_records].type = cta_res[j + 1];
								records[num_records].value = cta_res[j + 4] << 8 | cta_res[j + 5];
								records[num_records++].price = cta_res[j + 11] << 8 | cta_res[j + 12];
							}
							j += 16;
						}
					}
				}
			}

			if(reader->nagra_read == 1)
			{
				qsort(records, num_records, sizeof(ncmed_rec), reccmp);
			}
			else
			{
				qsort(records, num_records, sizeof(ncmed_rec), reccmp2);
			}

			int32_t  euro = 0;
			char tiername[83];
			time_t rawtime;
			struct tm timeinfo;
			time(&rawtime);
			localtime_r(&rawtime, &timeinfo);
			snprintf(currdate, sizeof(currdate), "%02d/%02d/%04d", timeinfo.tm_mday, timeinfo.tm_mon + 1, timeinfo.tm_year + 1900);

			for(i = 0; i < num_records; ++i)
			{
				switch(records[i].type)
				{
					case 0x00:
					case 0x01:
						if(reccmp(records[i].date2, currdate) >= 0)
						{
							if(reader->nagra_read == 2)
							{
								rdr_log(reader, "Tier : %04X, expiry date: %s %s",
									records[i].value, records[i].date2, get_tiername(records[i].value, reader->caid, tiername));
							}
							else if(reader->nagra_read == 1)
							{
								euro = (records[i].price / 100);
								rdr_log(reader, "Activation     : ( %04X ) from %s to %s  (%3d euro) %s",
									records[i].value, records[i].date1, records[i].date2, euro, get_tiername(records[i].value, reader->caid, tiername));
							}
							cs_add_entitlement(
								reader,
								reader->caid,
								b2ll(4, reader->prid[0]),
								records[i].value,
								0,
								tiger_date2time(records[i].date1),
								tiger_date2time(records[i].date2)+ 0x1517F,
								4,
								1);
						} break;

					case 0x20:
					case 0x21:
						if(reccmp(records[i].date2, currdate) >= 0)
						{
							if(reader->nagra_read == 2)
							{
								rdr_log(reader, "Tier : %04X, expiry date: %s %s", records[i].value, records[i].date2, get_tiername(records[i].value, reader->caid, tiername));
							}
							cs_add_entitlement(
								reader,
								reader->caid,
								b2ll(4, reader->prid[0]),
								records[i].value,
								0,
								tiger_date2time(records[i].date1),
								tiger_date2time(records[i].date2)+ 0x1517F,
								4,
								1);
						} break;
				}

				if(reader->nagra_read == 2)
				{
					while(i < num_records - 1 && records[i].value == records[i + 1].value)
					{
						++i;
					}
				}
			}

			for(i = 0; i < num_records; ++i)
			{
				switch(records[i].type)
				{
					case 0x80:
						if(reader->nagra_read == 1)
						{
							euro = (records[i].price / 100) - prepaid;
							credit += euro;
							prepaid += euro;
							if(euro)
							{
								rdr_log(reader, "Recharge       :               %s                (%3d euro)", records[i].date2, euro);
							}
						} break;

					case 0x20:
					case 0x21:
						if(reader->nagra_read == 1)
						{
							euro = records[i].price / 100;
							credit -= euro;
							rdr_log(reader, "Subscription   : ( %04X ) from %s to %s  (%3d euro) %s",
								records[i].value, records[i].date1, records[i].date2, euro, get_tiername(records[i].value, reader->caid, tiername));
						} break;

					case 0x29:
						euro = records[i].price / 100;
						if(reader->nagra_read == 1) { credit -= euro; }
						rdr_log(reader, "Event purchase : ( %04X ) from %s to %s  (%3d euro)", records[i].value, records[i].date1, records[i].date2, euro);
						break;
				}
			}

			if(reader->nagra_read == 1)
			{
				rdr_log(reader, "Credit         :                                          %3d euro", credit);
			}
			else
			{
				rdr_log(reader, "Credit : %3d euro", balance);
			}
		}
	}
	else
	{
		def_resp;
		char tmp_dbg[13];
		CamStateRequest(reader);

		if(!do_cmd(reader, 0x12, 0x02, 0x92, 0x06, 0, cta_res, &cta_lr))
		{
			rdr_log_dbg(reader, D_READER, "get serial failed");
			return ERROR;
		}

		memcpy(reader->hexserial + 2, cta_res + 2, 4);
		rdr_log_dbg_sensitive(reader, D_READER, "SER:  {%s}", cs_hexdump(1, reader->hexserial + 2, 4, tmp_dbg, sizeof(tmp_dbg)));
		memcpy(reader->sa[0], cta_res + 2, 3);
		reader->nprov = 1;

		if(!GetDataType(reader, IRDINFO, 0x39))
		{
			return ERROR;
		}

		rdr_log_dbg(reader, D_READER, "IRDINFO DONE");
		CamStateRequest(reader);

		if((!memcmp(reader->rom + 5, "181", 3)) == 0) // dt05 is not supported by rom181
		{
			rdr_log(reader, "-----------------------------------------");
			rdr_log(reader, "|id  |tier    |valid from  |valid to    |");
			rdr_log(reader, "+----+--------+------------+------------+");

			if(!GetDataType(reader, TIERS, 0x57))
			{
				return ERROR;
			}

			rdr_log(reader, "-----------------------------------------");
			CamStateRequest(reader);
		}
	}
	return OK;
}

void nagra2_post_process(struct s_reader *reader)
{
	struct nagra_data *csystem_data = reader->csystem_data;
	if(!csystem_data->is_tiger)
	{
		CamStateRequest(reader);
		if RENEW_SESSIONKEY()
		{
			NegotiateSessionKey(reader);
		}

		if SENDDATETIME()
		{
			DateTimeCMD(reader);
		}
	}
}

static int32_t nagra2_do_ecm(struct s_reader *reader, const ECM_REQUEST *er, struct s_ecm_answer *ea)
{
	def_resp;
	struct nagra_data *csystem_data = reader->csystem_data;
	if(!csystem_data->is_tiger)
	{
		int32_t retry = 0;
		if(csystem_data->is_n3_na)
		{
			uint8_t ecm_pkt[256 + 16];
			memset(ecm_pkt, 0, sizeof(ecm_pkt));
			memcpy(ecm_pkt, er->ecm + 3 + 2, er->ecm[4]);

			while(!do_cmd(reader, er->ecm[3] + 1, er->ecm[4] + 5 + 2, 0x88, 0x04, ecm_pkt, cta_res, &cta_lr))
			{
				if(retry == 0)
				{
					rdr_log_dbg(reader, D_READER, "nagra2_do_ecm (N3_NA) failed, retry");
				}
				else
				{
					rdr_log_dbg(reader, D_READER, "nagra2_do_ecm (N3_NA) failed, retry failed!");
					return ERROR;
				}
				retry++;
				cs_sleepms(10);
			}
		}
		else
		{
			if(reader->ecmcommand < 5) // cache ecm commands until ecmcommand cache is full
			{
				reader->ecmcommandcache[reader->ecmcommand] = er->ecm[3];
				reader->ecmcommand++;

				if(reader->ecmcommand == 5) // cache is full, comparing!
				{
					int32_t t = 0;
					int32_t matchfound = 0;
					reader->ecmcommand++; // No more caching of ecm commands, next ecms will be compared!

					while(t < 5)
					{
						if(reader->ecmcommandcache[t] == er->ecm[3])
						{
							matchfound++;
						}
						t++;
					}

					if(matchfound != 5)
					{
						reader->ecmcommand = 0; // reset ecm filter, start a new auto filter attempt
						rdr_log_dbg(reader, D_READER, "Auto ecm command filter caid %04X failed!", reader->caid);
					}
					else
					{
						reader->ecmcommandcache[0] = er->ecm[3]; // Passed the filter, store the normal ecm command for this reader!
						rdr_log_dbg(reader, D_READER, "Auto ecm command filter caid %04X set to command %02X", reader->caid, er->ecm[3]);
					}
				}
			}
			else if(reader->ecmcommandcache[0] != er->ecm[3])
			{
				rdr_log_dbg(reader, D_READER, "Warning: received an abnominal ecm command %02X for caid: %04X, ignoring!", er->ecm[3], reader->caid);
				memset(ea, 0, sizeof(struct s_ecm_answer)); // give it back 00000000 to not disturb the loadbalancer for valid ecm requests on this channel.
				return OK;
			}

			while(!do_cmd(reader, er->ecm[3], er->ecm[4] + 2, 0x87, 0x02, er->ecm + 3 + 2, cta_res, &cta_lr))
			{
				if(retry == 0)
				{
					rdr_log_dbg(reader, D_READER, "nagra2_do_ecm failed, retry");
				}
				else
				{
					rdr_log_dbg(reader, D_READER, "nagra2_do_ecm failed, retry failed!");
					return ERROR;
				}
				retry++;
				cs_sleepms(10);
			}
		}
		cs_sleepms(10);

		retry = 0;
		while(!CamStateRequest(reader) && retry < 3)
		{
			rdr_log_dbg(reader, D_READER, "CamStateRequest failed, try: %d", retry);
			retry++;
			cs_sleepms(10);
		}

		if(HAS_CW() && (do_cmd(reader, 0x1C, 0x02, 0x9C, 0x36, NULL, cta_res, &cta_lr)))
		{
			uint8_t v[8];
			memset(v, 0, sizeof(v));
			uint8_t _cwe0[8];
			uint8_t _cwe1[8];
			char tmp_dbg[25];

			if(csystem_data->swapCW == 1)
			{
				rdr_log_dbg(reader, D_READER, "swap cws");
				idea_cbc_encrypt(&cta_res[30], &_cwe1[0], 8, &csystem_data->ksSession, v, IDEA_DECRYPT);
				memset(v, 0, sizeof(v));
				idea_cbc_encrypt(&cta_res[4], &_cwe0[0], 8, &csystem_data->ksSession, v, IDEA_DECRYPT);
			}
			else
			{
				idea_cbc_encrypt(&cta_res[30], &_cwe0[0], 8, &csystem_data->ksSession, v, IDEA_DECRYPT);
				memset(v, 0, sizeof(v));
				idea_cbc_encrypt(&cta_res[4], &_cwe1[0], 8, &csystem_data->ksSession, v, IDEA_DECRYPT);
			}
			rdr_log_dbg(reader, D_READER, "CW0 after IDEA decrypt: %s", cs_hexdump(1, _cwe0, 8, tmp_dbg, sizeof(tmp_dbg)));
			rdr_log_dbg(reader, D_READER, "CW1 after IDEA decrypt: %s", cs_hexdump(1, _cwe1, 8, tmp_dbg, sizeof(tmp_dbg)));

			if(CW_NEEDS_3DES())
			{
				rdr_log_dbg(reader, D_READER, "3DES encryption of CWs detected. Using CWPK index:%02X", (csystem_data->ird_info & 7));

				if(reader->cak63cwekey_length != 16)
				{
					rdr_log_dbg(reader, D_READER, "ERROR: Invalid CWPK, can not decrypt CW");
					return ERROR;
				}

				des_ecb3_decrypt(_cwe0, reader->cak63cwekey);
				des_ecb3_decrypt(_cwe1, reader->cak63cwekey);
				rdr_log_dbg(reader, D_READER, "CW0 after 3DES decrypt: %s", cs_hexdump(1, _cwe0, 8, tmp_dbg, sizeof(tmp_dbg)));
				rdr_log_dbg(reader, D_READER, "CW1 after 3DES decrypt: %s", cs_hexdump(1, _cwe1, 8, tmp_dbg, sizeof(tmp_dbg)));

				if (!cfg.disablecrccws && !reader->disablecrccws && !chk_if_ignore_checksum((ECM_REQUEST*) er, &cfg.disablecrccws_only_for) && !chk_if_ignore_checksum((ECM_REQUEST*) er, &reader->disablecrccws_only_for))
				{
					int chkok = 1;
					if(((_cwe0[0] + _cwe0[1] + _cwe0[2]) & 0xFF) != _cwe0[3])
					{
						chkok = 0;
						rdr_log_dbg(reader, D_READER, "CW0 checksum error [0]");
					}

					if(((_cwe0[4] + _cwe0[5] + _cwe0[6]) & 0xFF) != _cwe0[7])
					{
						chkok = 0;
						rdr_log_dbg(reader, D_READER, "CW0 checksum error [1]");
					}

					if(((_cwe1[0] + _cwe1[1] + _cwe1[2]) & 0xFF) != _cwe1[3])
					{
						chkok = 0;
						rdr_log_dbg(reader, D_READER, "CW1 checksum error [0]");
					}

					if(((_cwe1[4] + _cwe1[5] + _cwe1[6]) & 0xFF) != _cwe1[7])
					{
						chkok = 0;
						rdr_log_dbg(reader, D_READER, "CW1 checksum error [1]");
					}

					if(chkok == 0)
					{
						rdr_log_dbg(reader, D_READER, "CW Decrypt failed");
						return ERROR;
					}
				}
				else
				{
					rdr_log_dbg(reader, D_READER, "checksum test skipped");
				}
			}

			memcpy(ea->cw, _cwe0, 0x08);
			memcpy(ea->cw + 8, _cwe1, 0x08);

			return OK;
		}
	}
	else
	{
		// check ECM prov id
		if(memcmp(&reader->prid[0][2], er->ecm + 5, 2))
		{
			return ERROR;
		}

		// ecm_data: 80 30 89 D3 87 54 11 10 DA A6 0F 4B 92 05 34 00
		// serial_data: A0 CA 00 00 8C D3 8A 00 00 00 00 00 10 DA A6 0F
		uint8_t ecm_trim[150];
		memset(ecm_trim, 0, 150);
		memcpy(&ecm_trim[5], er->ecm + 3 + 2 + 2, er->ecm[4] + 2);

		if(do_cmd(reader, er->ecm[3], er->ecm[4] + 5, 0x53, 0x16, ecm_trim, cta_res, &cta_lr))
		{
			if(cta_res[2] == 0x01)
			{
				uint8_t v[8];
				memset(v, 0, sizeof(v));
				idea_cbc_encrypt(&cta_res[14], ea->cw, 8, &csystem_data->ksSession, v, IDEA_DECRYPT);
				memset(v, 0, sizeof(v));
				idea_cbc_encrypt(&cta_res[6], ea->cw + 8, 8, &csystem_data->ksSession, v, IDEA_DECRYPT);
				return OK;
			}
			rdr_log_dbg(reader, D_READER, "can't decode ecm");
			return ERROR;
		}
	}
	return ERROR;
}

static int32_t nagra2_do_emm(struct s_reader *reader, EMM_PACKET *ep)
{
	def_resp;
	struct nagra_data *csystem_data = reader->csystem_data;
	if(!csystem_data->is_tiger)
	{
		if(!do_cmd(reader, ep->emm[8], ep->emm[9] + 2, 0x84, 0x02, ep->emm + 8 + 2, cta_res, &cta_lr))
		{
			rdr_log_dbg(reader, D_READER, "nagra2_do_emm failed");
			return ERROR;
		}

		// for slow t14 nagra cards, we must do additional timeout
		if(csystem_data->is_pure_nagra == 1)
		{
			cs_sleepms(300);
		}
		cs_sleepms(250);
		nagra2_post_process(reader);
	}
	else
	{
		//check EMM prov id
		if(memcmp(&reader->prid[0][2], ep->emm + 10, 2))
		{
			rdr_log_dbg(reader, D_READER, "EMM skipped since provider doesnt match!");
			return SKIPPED;
		}

		//   emm_data: 82 70 8E 00 00 00 00 00 D3 87 8D 11 C0 F4 B1 27 2C 3D 25 94 ...
		//serial_data: A0 CA 00 00 8C D3 8A 01 00 00 00 00 C0 F4 B1 27 2C 3D 25 94 ...
		uint8_t emm_trim[150] = { 0x01, 0x00, 0x00, 0x00, 0x00 };
		memcpy(&emm_trim[5], ep->emm + 3 + 5 + 2 + 2, ep->emm[9] + 2);

		if(!do_cmd(reader, ep->emm[8], ep->emm[9] + 5, 0x53, 0x16, emm_trim, cta_res, &cta_lr))
		{
			rdr_log_dbg(reader, D_READER, "nagra2_do_emm failed");
			return ERROR;
		}
		cs_sleepms(300);
	}

	if(ep->type != GLOBAL)
	{
		struct timeb now;
		cs_ftime(&now);
		int64_t gone = comp_timeb(&now, &reader->emm_last);
		if(gone > 3600*1000)
		{
			add_job(reader->client, ACTION_READER_CARDINFO, NULL, 0); // refresh entitlement since it might have been changed!
		}
	}
	return OK;
}

const struct s_cardsystem reader_nagra =
{
	.desc           = "nagra",
	.caids          = (uint16_t[]){ 0x18, 0 },
	.do_emm         = nagra2_do_emm,
	.do_ecm         = nagra2_do_ecm,
	.post_process   = nagra2_post_process,
	.card_info      = nagra2_card_info,
	.card_init      = nagra2_card_init,
	.get_emm_type   = nagra_get_emm_type,
	.get_emm_filter = nagra_get_emm_filter,
};

#endif
