#define SSH1_CMSG_AUTH_CCARD	70
#define SSH1_SMSG_AUTH_CCARD_CHALLENGE	71
#define SSH1_CMSG_AUTH_CCARD_RESPONSE	72

#define SSH1_AUTH_TIS		5
#define SSH1_AUTH_CCARD		16

#define SSH_AGENTC_REQUEST_RSA_IDENTITIES    1
#define SSH_AGENT_RSA_IDENTITIES_ANSWER      2
#define SSH_AGENTC_RSA_CHALLENGE             3
#define SSH_AGENT_RSA_RESPONSE               4
#define SSH_AGENT_FAILURE                    5
#define SSH_AGENT_SUCCESS                    6
#define SSH_AGENTC_ADD_RSA_IDENTITY          7
#define SSH_AGENTC_REMOVE_RSA_IDENTITY       8

#define SSH2_MSG_DISCONNECT             1
#define SSH2_MSG_IGNORE                 2
#define SSH2_MSG_UNIMPLEMENTED          3
#define SSH2_MSG_DEBUG                  4
#define SSH2_MSG_SERVICE_REQUEST        5
#define SSH2_MSG_SERVICE_ACCEPT         6
#define SSH2_MSG_KEXINIT                20

static void send_packet(int pkttype, ...)
{
    va_list args;
    unsigned char *p, *argp, argchar;
    unsigned long argint;
    int pktlen, argtype, arglen;
    Bignum bn;


    pktlen = 0;
    va_start(args, pkttype);
    while ((argtype = va_arg(args, int)) != PKT_END) {
	switch (argtype) {
	  case PKT_INT:
	    (void) va_arg(args, int);

	  case PKT_STR:
	    argp = va_arg(args, unsigned char *);
	    arglen = strlen(argp);
	    pktlen += 4 + arglen;
	    break;
	  case PKT_BIGNUM:
	    bn = va_arg(args, Bignum);



            pktlen += ssh1_bignum_length(bn);
	    break;
	  default:
	    assert(0);
	}
    }
    va_end(args);

	    arglen = strlen(argp);
	    PUT_32BIT(p, arglen);
	    memcpy(p + 4, argp, arglen);
	    p += 4 + arglen;
	    break;
	  case PKT_BIGNUM:
	    bn = va_arg(args, Bignum);
            p += ssh1_write_bignum(p, bn);











	    break;
	}
    }
    va_end(args);

    s_wrpkt();
}

    logevent("Successfully started encryption");

    fflush(stdout);
    {
	static char username[100];
	static int pos = 0;
	static char c;
	if ((flags & FLAG_CONNECTION) && !*cfg.username) {
	    c_write("login as: ", 10);
	    while (pos >= 0) {
		crWaitUntil(!ispkt);
		while (inlen--) switch (c = *in++) {
		  case 10: case 13:
		    username[pos] = 0;
		    pos = -1;

        static int pwpkt_type;
        /*
         * Show password prompt, having first obtained it via a TIS
         * or CryptoCard exchange if we're doing TIS or CryptoCard
         * authentication.
         */
        pwpkt_type = SSH1_CMSG_AUTH_PASSWORD;
        if (agent_exists()) {
            /*
             * Attempt RSA authentication using Pageant.
             */
            static unsigned char request[5], *response, *p;
            static int responselen;
            static int i, nkeys;
            static int authed = FALSE;
            void *r;

            logevent("Pageant is running. Requesting keys.");

            /* Request the keys held by the agent. */
            PUT_32BIT(request, 1);
            request[4] = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
            agent_query(request, 5, &r, &responselen);
            response = (unsigned char *)r;
            if (response) {
                p = response + 5;
                nkeys = GET_32BIT(p); p += 4;
                { char buf[64]; sprintf(buf, "Pageant has %d keys", nkeys);
                    logevent(buf); }
                for (i = 0; i < nkeys; i++) {
                    static struct RSAKey key;
                    static Bignum challenge;

                    { char buf[64]; sprintf(buf, "Trying Pageant key #%d", i);
                        logevent(buf); }
                    p += 4;
                    p += ssh1_read_bignum(p, &key.exponent);
                    p += ssh1_read_bignum(p, &key.modulus);
                    send_packet(SSH1_CMSG_AUTH_RSA,
                                PKT_BIGNUM, key.modulus, PKT_END);
                    crWaitUntil(ispkt);
                    if (pktin.type != SSH1_SMSG_AUTH_RSA_CHALLENGE) {
                        logevent("Key refused");
                        continue;
                    }
                    logevent("Received RSA challenge");
                    ssh1_read_bignum(pktin.body, &challenge);
                    {
                        char *agentreq, *q, *ret;
                        int len, retlen;
                        len = 1 + 4;   /* message type, bit count */
                        len += ssh1_bignum_length(key.exponent);
                        len += ssh1_bignum_length(key.modulus);
                        len += ssh1_bignum_length(challenge);
                        len += 16;     /* session id */
                        len += 4;      /* response format */
                        agentreq = malloc(4 + len);
                        PUT_32BIT(agentreq, len);
                        q = agentreq + 4;
                        *q++ = SSH_AGENTC_RSA_CHALLENGE;
                        PUT_32BIT(q, ssh1_bignum_bitcount(key.modulus));
                        q += 4;
                        q += ssh1_write_bignum(q, key.exponent);
                        q += ssh1_write_bignum(q, key.modulus);
                        q += ssh1_write_bignum(q, challenge);
                        memcpy(q, session_id, 16); q += 16;
                        PUT_32BIT(q, 1);   /* response format */
                        agent_query(agentreq, len+4, &ret, &retlen);
                        free(agentreq);
                        if (ret) {
                            if (ret[4] == SSH_AGENT_RSA_RESPONSE) {
                                logevent("Sending Pageant's response");
                                send_packet(SSH1_CMSG_AUTH_RSA_RESPONSE,
                                            PKT_DATA, ret+5, 16, PKT_END);
                                free(ret);
                                crWaitUntil(ispkt);
                                if (pktin.type == SSH1_SMSG_SUCCESS) {
                                    logevent("Pageant's response accepted");
                                    authed = TRUE;
                                } else
                                    logevent("Pageant's response not accepted");
                            } else {
                                logevent("Pageant failed to answer challenge");
                                free(ret);
                            }
                        } else {
                            logevent("No reply received from Pageant");
                        }
                    }
                    freebn(key.exponent);
                    freebn(key.modulus);
                    freebn(challenge);
                    if (authed)
                        break;
                }
            }
            if (authed)
                break;
        }
        if (*cfg.keyfile && !tried_publickey)
            pwpkt_type = SSH1_CMSG_AUTH_RSA;

	if (pwpkt_type == SSH1_CMSG_AUTH_PASSWORD && !FLAG_WINDOWED) {
	    char prompt[200];
	    sprintf(prompt, "%s@%s's password: ", cfg.username, savedhost);
	    if (!ssh_get_password(prompt, password, sizeof(password))) {