t_ser.c   [plain text]

/*
 * lib/krb5/krb/t_ser.c
 *
 * Copyright 1995 by the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 */

/*
 * t_ser.c - Test serialization.
 */
#include "k5-int.h"
#include "com_err.h"
#include "auth_con.h"

#include <ctype.h>

static const char stuff[]="You can't take a pointer to a function and convert \
it to a pointer to char; ANSI doesn't say it'll work, and in fact on the HPPA \
you can lose some bits of the function pointer, and get a pointer that you \
can't safely dereference.  This test file used to make this mistake, often.";

/*
 * Dump an external representation.
 */
static void
print_erep(krb5_octet *erep, size_t elen)
{
    int i, j;

    for (i=0; i<elen; ) {
	printf("%08d: ", i);
	for (j=0; j<15; j++) {
	    if ((i+j) < elen)
		printf("%02x ", erep[i+j]);
	    else
		printf("-- ");
	}
	printf("\t");
	for (j=0; j<15; j++) {
	    if ((i+j) < elen) {
		if (isprint(erep[i+j]) && (erep[i+j] != '\n'))
		    printf("%c", erep[i+j]);
		else
		    printf(".");
	    }
	    else
		printf("-");
	}
	printf("\n");
	i += 15;
    }
}

/*
 * Do a serialization test.
 */
static krb5_error_code
ser_data(int verbose, char *msg, krb5_pointer ctx, krb5_magic dtype)
{
    krb5_error_code	kret;
    krb5_context	ser_ctx;
    krb5_pointer	nctx;
    krb5_octet		*outrep, *ibuf, *outrep2;
    size_t		outlen, ilen, outlen2;

    /* Initialize context and initialize all Kerberos serializers */
    if ((kret = krb5_init_context(&ser_ctx))) {
	    printf("Couldn't initialize krb5 library: %s\n",
		   error_message(kret));
	    exit(1);
    }
    krb5_ser_context_init(ser_ctx);
    krb5_ser_auth_context_init(ser_ctx);
    krb5_ser_ccache_init(ser_ctx);
    krb5_ser_rcache_init(ser_ctx);
    krb5_ser_keytab_init(ser_ctx);

    /* Externalize the data */
    kret = krb5_externalize_data(ser_ctx, ctx, &outrep, &outlen);
    if (!kret) {
	if (verbose) {
	    printf("%s: externalized in %d bytes\n", msg, outlen);
	    print_erep(outrep, outlen);
	}

	/* Now attempt to re-constitute it */
	ibuf = outrep;
	ilen = outlen;
	kret = krb5_internalize_opaque(ser_ctx,
				       dtype,
				       (krb5_pointer *) &nctx,
				       &ibuf,
				       &ilen);
	if (!kret) {
	    if (ilen)
		printf("%s: %d bytes left over after internalize\n",
		       msg, ilen);
	    /* Now attempt to re-externalize it */
	    kret = krb5_externalize_data(ser_ctx, nctx, &outrep2, &outlen2);
	    if (!kret) {
		/* Compare the results. */
		if ((outlen2 != outlen) ||
		    memcmp(outrep, outrep2, outlen)) {
		    printf("%s: comparison failed\n", msg);
		    print_erep(outrep2, outlen2);
		}
		else {
		    if (verbose)
			printf("%s: compare succeeded\n", msg);
		}
		krb5_xfree(outrep2);
	    }
	    else
		printf("%s: second externalize returned %d\n", msg, kret);

	    /* Free the data */
	    switch (dtype) {
	    case KV5M_CONTEXT:
		krb5_db_fini((krb5_context) nctx);
		krb5_free_context((krb5_context) nctx);
		break;
	    case KV5M_AUTH_CONTEXT:
		if (nctx) {
		    krb5_auth_context	actx;

		    actx = (krb5_auth_context) nctx;
		    if (actx->i_vector)
			krb5_xfree(actx->i_vector);
		}
		krb5_auth_con_free(ser_ctx, (krb5_auth_context) nctx);
		break;
	    case KV5M_CCACHE:
		krb5_cc_close(ser_ctx, (krb5_ccache) nctx);
		break;
	    case KV5M_RCACHE:
		krb5_rc_close(ser_ctx, (krb5_rcache) nctx);
		break;
	    case KV5M_KEYTAB:
		krb5_kt_close(ser_ctx, (krb5_keytab) nctx);
		break;
	    case KV5M_ENCRYPT_BLOCK:
		if (nctx) {
		    krb5_encrypt_block *eblock;

		    eblock = (krb5_encrypt_block *) nctx;
#if 0
		    if (eblock->priv && eblock->priv_size)
			krb5_xfree(eblock->priv);
#endif
		    if (eblock->key)
			krb5_free_keyblock(ser_ctx, eblock->key);
		    krb5_xfree(eblock);
		}
		break;
	    case KV5M_PRINCIPAL:
		krb5_free_principal(ser_ctx, (krb5_principal) nctx);
		break;
	    case KV5M_CHECKSUM:
		krb5_free_checksum(ser_ctx, (krb5_checksum *) nctx);
		break;
	    default:
		printf("don't know how to free %d\n", dtype);
		break;
	    }
	}
	else
	    printf("%s: internalize returned %d\n", msg, kret);
	krb5_xfree(outrep);
    }
    else
	printf("%s: externalize_data returned %d\n", msg, kret);
    krb5_free_context(ser_ctx);
    return(kret);
}

/*
 * Serialize krb5_context.
 */
static krb5_error_code
ser_kcontext_test(krb5_context kcontext, int verbose)
{
    krb5_error_code	kret;
    profile_t		sprofile;
    char		dbname[128];

    sprintf(dbname, "temp_%d", (int) getpid());
    sprofile = kcontext->profile;
    kcontext->profile = (profile_t) NULL;
    if (!(kret = ser_data(verbose, "> Context with no profile",
			  (krb5_pointer) kcontext,
			  KV5M_CONTEXT))) {
	kcontext->profile = sprofile;
	if (!(kret = ser_data(verbose, "> Context with no realm", 
			      (krb5_pointer) kcontext,
			      KV5M_CONTEXT)) &&
	    !(kret = krb5_set_default_realm(kcontext, "this.is.a.test"))) {
	    if (!(kret = ser_data(verbose, "> Context with default realm",
				  (krb5_pointer) kcontext,
				  KV5M_CONTEXT))) {
		if (verbose)
		    printf("* krb5_context test succeeded\n");
	    }
	}
    }
    if (kret)
	printf("* krb5_context test failed\n");
    return(kret);
}

/* 
 * Serialize krb5_auth_context.
 */
static krb5_error_code
ser_acontext_test(krb5_context kcontext, int verbose)
{
    krb5_error_code	kret;
    krb5_auth_context	actx;
    krb5_address	local_address;
    krb5_address	remote_address;
    krb5_octet		laddr_bytes[16];
    krb5_octet		raddr_bytes[16];
    krb5_keyblock	ukeyblock;
    krb5_octet		keydata[8];
    krb5_authenticator	aent;
    char		clname[128];
    krb5_authdata	*adatalist[3];
    krb5_authdata	adataent;

    actx = (krb5_auth_context) NULL;
    if (!(kret = krb5_auth_con_init(kcontext, &actx)) &&
	!(kret = ser_data(verbose, "> Vanilla auth context",
			  (krb5_pointer) actx,
			  KV5M_AUTH_CONTEXT))) {
	memset(&local_address, 0, sizeof(local_address));
	memset(&remote_address, 0, sizeof(remote_address));
	memset(laddr_bytes, 0, sizeof(laddr_bytes));
	memset(raddr_bytes, 0, sizeof(raddr_bytes));
	local_address.addrtype = ADDRTYPE_INET;
	local_address.length = sizeof(laddr_bytes);
	local_address.contents = laddr_bytes;
	laddr_bytes[0] = 6;
	laddr_bytes[1] = 2;
	laddr_bytes[2] = 69;
	laddr_bytes[3] = 16;
	laddr_bytes[4] = 1;
	laddr_bytes[5] = 0;
	laddr_bytes[6] = 0;
	laddr_bytes[7] = 127;
	remote_address.addrtype = ADDRTYPE_INET;
	remote_address.length = sizeof(raddr_bytes);
	remote_address.contents = raddr_bytes;
	raddr_bytes[0] = 6;
	raddr_bytes[1] = 2;
	raddr_bytes[2] = 70;
	raddr_bytes[3] = 16;
	raddr_bytes[4] = 1;
	raddr_bytes[5] = 0;
	raddr_bytes[6] = 0;
	raddr_bytes[7] = 127;
	if (!(kret = krb5_auth_con_setaddrs(kcontext, actx,
					    &local_address,
					    &remote_address)) &&
	    !(kret = krb5_auth_con_setports(kcontext, actx,
					    &local_address,
					    &remote_address)) &&
	    !(kret = ser_data(verbose, "> Auth context with addrs/ports", 
			      (krb5_pointer) actx,
			      KV5M_AUTH_CONTEXT))) {
	    memset(&ukeyblock, 0, sizeof(ukeyblock));
	    memset(keydata, 0, sizeof(keydata));
	    ukeyblock.enctype = ENCTYPE_DES_CBC_MD5;
	    ukeyblock.length = sizeof(keydata);
	    ukeyblock.contents = keydata;
	    keydata[0] = 0xde;
	    keydata[1] = 0xad;
	    keydata[2] = 0xbe;
	    keydata[3] = 0xef;
	    keydata[4] = 0xfe;
	    keydata[5] = 0xed;
	    keydata[6] = 0xf0;
	    keydata[7] = 0xd;
	    if (!(kret = krb5_auth_con_setuseruserkey(kcontext, actx,
						      &ukeyblock)) &&
		!(kret = ser_data(verbose, "> Auth context with user key",
				  (krb5_pointer) actx,
				  KV5M_AUTH_CONTEXT)) &&
		!(kret = krb5_auth_con_initivector(kcontext, actx)) &&
		!(kret = ser_data(verbose, "> Auth context with new vector",
				  (krb5_pointer) actx,
				  KV5M_AUTH_CONTEXT)) &&
		(krb5_xfree(actx->i_vector), actx->i_vector) &&
		!(kret = krb5_auth_con_setivector(kcontext, actx,
						  (krb5_pointer) print_erep)
		  ) &&
		!(kret = ser_data(verbose, "> Auth context with set vector",
				  (krb5_pointer) actx,
				  KV5M_AUTH_CONTEXT))) {
		/*
		 * Finally, add an authenticator.
		 */
		memset(&aent, 0, sizeof(aent));
		aent.magic = KV5M_AUTHENTICATOR;
		sprintf(clname, "help/me/%d@this.is.a.test", (int) getpid());
		actx->authentp = &aent;
		if (!(kret = krb5_parse_name(kcontext, clname,
					     &aent.client)) &&
		    !(kret = ser_data(verbose,
				      "> Auth context with authenticator",
				      (krb5_pointer) actx,
				      KV5M_AUTH_CONTEXT))) {
		    adataent.magic = KV5M_AUTHDATA;
		    adataent.ad_type = 123;
		    adataent.length = 128;
		    adataent.contents = (krb5_octet *) stuff;
		    adatalist[0] = &adataent;
		    adatalist[1] = &adataent;
		    adatalist[2] = (krb5_authdata *) NULL;
		    aent.authorization_data = adatalist;
		    if (!(kret = ser_data(verbose,
					  "> Auth context with full auth",
					  (krb5_pointer) actx,
					  KV5M_AUTH_CONTEXT))) {
			if (verbose)
			    printf("* krb5_auth_context test succeeded\n");
		    }
		    krb5_free_principal(kcontext, aent.client);
		}
		actx->authentp = (krb5_authenticator *) NULL;
	    }
	}
    }
    if (actx)
	krb5_auth_con_free(kcontext, actx);
    if (kret)
	printf("* krb5_auth_context test failed\n");
    return(kret);
}

/*
 * Serialize krb5_ccache
 */
static krb5_error_code
ser_ccache_test(krb5_context kcontext, int verbose)
{
    krb5_error_code	kret;
    char		ccname[128];
    char		princname[256];
    krb5_ccache		ccache;
    krb5_principal	principal;

    sprintf(ccname, "temp_cc_%d", (int) getpid());
    sprintf(princname, "zowie%d/instance%d@this.is.a.test",
	    (int) getpid(), (int) getpid());
    if (!(kret = krb5_cc_resolve(kcontext, ccname, &ccache)) &&
	!(kret = ser_data(verbose, "> Resolved default ccache",
			  (krb5_pointer) ccache, KV5M_CCACHE)) &&
	!(kret = krb5_parse_name(kcontext, princname, &principal)) &&
	!(kret = krb5_cc_initialize(kcontext, ccache, principal)) &&
	!(kret = ser_data(verbose, "> Initialized default ccache",
			  (krb5_pointer) ccache, KV5M_CCACHE)) &&
	!(kret = krb5_cc_destroy(kcontext, ccache))) {
	krb5_free_principal(kcontext, principal);
	sprintf(ccname, "FILE:temp_cc_%d", (int) getpid());
	sprintf(princname, "xxx%d/i%d@this.is.a.test",
		(int) getpid(), (int) getpid());
	if (!(kret = krb5_cc_resolve(kcontext, ccname, &ccache)) &&
	    !(kret = ser_data(verbose, "> Resolved FILE ccache",
			      (krb5_pointer) ccache, KV5M_CCACHE)) &&
	    !(kret = krb5_parse_name(kcontext, princname, &principal)) &&
	    !(kret = krb5_cc_initialize(kcontext, ccache, principal)) &&
	    !(kret = ser_data(verbose, "> Initialized FILE ccache",
			      (krb5_pointer) ccache, KV5M_CCACHE)) &&
	    !(kret = krb5_cc_destroy(kcontext, ccache))) {
	    krb5_free_principal(kcontext, principal);

	    if (verbose)
		printf("* ccache test succeeded\n");
	}
    }
    if (kret)
	printf("* krb5_ccache test failed\n");
    return(kret);
}

/*
 * Serialize krb5_keytab.
 */
static krb5_error_code
ser_keytab_test(krb5_context kcontext, int verbose)
{
    krb5_error_code	kret;
    char		ccname[128];
    krb5_keytab		keytab;
    extern krb5_kt_ops	krb5_ktf_writable_ops;

    sprintf(ccname, "temp_kt_%d", (int) getpid());
    if (!(kret = krb5_kt_resolve(kcontext, ccname, &keytab)) &&
	!(kret = ser_data(verbose, "> Resolved default keytab",
			  (krb5_pointer) keytab, KV5M_KEYTAB)) &&
	!(kret = krb5_kt_close(kcontext, keytab))) {
	sprintf(ccname, "FILE:temp_kt_%d", (int) getpid());
	if (!(kret = krb5_kt_resolve(kcontext, ccname, &keytab)) &&
	    !(kret = ser_data(verbose, "> Resolved FILE keytab",
			      (krb5_pointer) keytab, KV5M_KEYTAB)) &&
	    !(kret = krb5_kt_close(kcontext, keytab))) {
	    sprintf(ccname, "WRFILE:temp_kt_%d", (int) getpid());
	    if ((kret = krb5_kt_resolve(kcontext, ccname, &keytab)))
		kret = krb5_kt_register(kcontext, &krb5_ktf_writable_ops);
	    else
		kret = krb5_kt_close(kcontext, keytab);
	    if (!kret &&
		!(kret = krb5_kt_resolve(kcontext, ccname, &keytab)) &&
		!(kret = ser_data(verbose, "> Resolved WRFILE keytab",
				  (krb5_pointer) keytab, KV5M_KEYTAB)) &&
		!(kret = krb5_kt_close(kcontext, keytab))) {
		if (verbose)
		    printf("* keytab test succeeded\n");
	    }
	}
    }
    if (kret)
	printf("* krb5_keytab test failed\n");
    return(kret);
}

/*
 * Serialize krb5_rcache.
 */
static krb5_error_code
ser_rcache_test(krb5_context kcontext, int verbose)
{
    krb5_error_code	kret;
    char		rcname[128];
    krb5_rcache		rcache;

    sprintf(rcname, "dfl:temp_rc_%d", (int) getpid());
    if (!(kret = krb5_rc_resolve_full(kcontext, &rcache, rcname)) &&
	!(kret = ser_data(verbose, "> Resolved FILE rcache",
			  (krb5_pointer) rcache, KV5M_RCACHE)) &&
	!(kret = krb5_rc_initialize(kcontext, rcache, 3600*24)) &&
	!(kret = ser_data(verbose, "> Initialized FILE rcache",
			  (krb5_pointer) rcache, KV5M_RCACHE)) &&
	!(kret = krb5_rc_destroy(kcontext, rcache))) {
	if (verbose)
	    printf("* rcache test succeeded\n");
    }
    if (kret)
	printf("* krb5_rcache test failed\n");
    return(kret);
}

#if 0
/*
 * Serialize krb5_encrypt_block.
 */
static krb5_error_code
ser_eblock_test(kcontext, verbose)
    krb5_context	kcontext;
    int			verbose;
{
    krb5_error_code	kret;
    krb5_encrypt_block	eblock;    
    krb5_keyblock	ukeyblock;
    krb5_octet		keydata[8];

    memset(&eblock, 0, sizeof(krb5_encrypt_block));
    eblock.magic = KV5M_ENCRYPT_BLOCK;
    krb5_use_enctype(kcontext, &eblock, DEFAULT_KDC_ENCTYPE);
    if (!(kret = ser_data(verbose, "> NULL eblock",
			  (krb5_pointer) &eblock, KV5M_ENCRYPT_BLOCK))) {
#if 0
	eblock.priv = (krb5_pointer) stuff;
	eblock.priv_size = 8;
#endif
	if (!(kret = ser_data(verbose, "> eblock with private data",
			      (krb5_pointer) &eblock,
			      KV5M_ENCRYPT_BLOCK))) {
	    memset(&ukeyblock, 0, sizeof(ukeyblock));
	    memset(keydata, 0, sizeof(keydata));
	    ukeyblock.enctype = ENCTYPE_DES_CBC_MD5;
	    ukeyblock.length = sizeof(keydata);
	    ukeyblock.contents = keydata;
	    keydata[0] = 0xde;
	    keydata[1] = 0xad;
	    keydata[2] = 0xbe;
	    keydata[3] = 0xef;
	    keydata[4] = 0xfe;
	    keydata[5] = 0xed;
	    keydata[6] = 0xf0;
	    keydata[7] = 0xd;
	    eblock.key = &ukeyblock;
	    if (!(kret = ser_data(verbose, "> eblock with private key",
				  (krb5_pointer) &eblock,
				  KV5M_ENCRYPT_BLOCK))) {
		if (verbose)
		    printf("* eblock test succeeded\n");
	    }
	}
    }
    if (kret)
	printf("* eblock test failed\n");
    return(kret);
}
#endif

/*
 * Serialize krb5_principal
 */
static krb5_error_code
ser_princ_test(krb5_context kcontext, int verbose)
{
    krb5_error_code	kret;
    krb5_principal	princ;
    char		pname[1024];

    sprintf(pname, "the/quick/brown/fox/jumped/over/the/lazy/dog/%d@this.is.a.test", (int) getpid());
    if (!(kret = krb5_parse_name(kcontext, pname, &princ))) {
	if (!(kret = ser_data(verbose, "> Principal",
			      (krb5_pointer) princ, KV5M_PRINCIPAL))) {
	    if (verbose)
		printf("* principal test succeeded\n");
	}
	krb5_free_principal(kcontext, princ);
    }
    if (kret)
	printf("* principal test failed\n");
    return(kret);
}

/*
 * Serialize krb5_checksum.
 */
static krb5_error_code
ser_cksum_test(krb5_context kcontext, int verbose)
{
    krb5_error_code	kret;
    krb5_checksum	checksum;
    krb5_octet		ckdata[24];

    memset(&checksum, 0, sizeof(krb5_checksum));
    checksum.magic = KV5M_CHECKSUM;
    if (!(kret = ser_data(verbose, "> NULL checksum",
			  (krb5_pointer) &checksum, KV5M_CHECKSUM))) {
	checksum.checksum_type = 123;
	checksum.length = sizeof(ckdata);
	checksum.contents = ckdata;
	memcpy(ckdata, (char *) &stuff, sizeof(ckdata)); 
	if (!(kret = ser_data(verbose, "> checksum with data",
			      (krb5_pointer) &checksum, KV5M_CHECKSUM))) {
	    if (verbose)
		printf("* checksum test succeeded\n");
	}
    }
    if (kret)
	printf("* checksum test failed\n");
    return(kret);
}

/*
 * Main procedure.
 */
int
main(int argc, char **argv)
{
    krb5_error_code	kret;
    krb5_context	kcontext;
    int			do_atest, do_ctest, do_ktest, do_rtest, do_xtest;
    int			do_etest, do_ptest, do_stest;
    int			verbose;
    int			option;
    extern char		*optarg;
    char		ch_err;

    kret = 0;
    verbose = 0;
    do_atest = 1;
    do_xtest = 1;
    do_ctest = 1;
    do_etest = 1;
    do_ktest = 1;
    do_ptest = 1;
    do_rtest = 1;
    do_stest = 1;
    while ((option = getopt(argc, argv, "acekprsxvACEKPRSX")) != -1) {
	switch (option) {
	case 'a':
	    do_atest = 0;
	    break;
	case 'c':
	    do_ctest = 0;
	    break;
	case 'e':
	    do_etest = 0;
	    break;
	case 'k':
	    do_ktest = 0;
	    break;
	case 'p':
	    do_ptest = 0;
	    break;
	case 'r':
	    do_rtest = 0;
	    break;
	case 's':
	    do_stest = 0;
	    break;
	case 'x':
	    do_xtest = 0;
	    break;
	case 'v':
	    verbose = 1;
	    break;
	case 'A':
	    do_atest = 1;
	    break;
	case 'C':
	    do_ctest = 1;
	    break;
#if 0
	case 'E':
	    do_etest = 1;
	    break;
#endif
	case 'K':
	    do_ktest = 1;
	    break;
	case 'P':
	    do_ptest = 1;
	    break;
	case 'R':
	    do_rtest = 1;
	    break;
	case 'S':
	    do_stest = 1;
	    break;
	case 'X':
	    do_xtest = 1;
	    break;
	default:
	    fprintf(stderr,
		    "%s: usage is %s [-acekprsxvACEKPRSX]\n",
		    argv[0], argv[0]);
	    exit(1);
	    break;
	}
    }
    if ((kret = krb5_init_context(&kcontext))) {
	    com_err(argv[0], kret, "while initializing krb5");
	    exit(1);
    }
    
    if (do_xtest) {
	    ch_err = 'x';
	    kret = ser_kcontext_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
    if (do_atest) {
	    ch_err = 'a';
	    kret = ser_acontext_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
    if (do_ctest) {
	    ch_err = 'c';
	    kret = ser_ccache_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
    if (do_ktest) {
	    ch_err = 'k';
	    kret = ser_keytab_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
    if (do_rtest) {
	    ch_err = 'r';
	    kret = ser_rcache_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
#if 0 /* code to be tested is currently disabled */
    if (do_etest) {
	    ch_err = 'e';
	    kret = ser_eblock_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
#endif
    if (do_ptest) {
	    ch_err = 'p';
	    kret = ser_princ_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
    if (do_stest) {
	    ch_err = 's';
	    kret = ser_cksum_test(kcontext, verbose);
	    if (kret)
		    goto fail;
    }
    krb5_free_context(kcontext);
    
    exit(0);
fail:
    com_err(argv[0], kret, "--- test %cfailed", ch_err);
    krb5_free_context(kcontext);
    exit(1);
}