File Manager

003 File Manager

Current Path: /usr/src/crypto/heimdal/lib/krb5

usr / src / crypto / heimdal / lib / krb5 /

📁 ..
📄 Makefile.am(7.68 KB)
📄 Makefile.in(224.98 KB)
📄 acache.c(26.87 KB)
📄 acl.c(7.58 KB)
📄 add_et_list.c(2.2 KB)
📄 addr_families.c(38.89 KB)
📄 aes-test.c(22.56 KB)
📄 aname_to_localname.c(2.83 KB)
📄 appdefault.c(4.41 KB)
📄 asn1_glue.c(2.37 KB)
📄 auth_context.c(14.97 KB)
📄 build_ap_req.c(2.77 KB)
📄 build_auth.c(5.5 KB)
📄 cache.c(41.88 KB)
📄 ccache_plugin.h(1.67 KB)
📄 changepw.c(20.59 KB)
📄 codec.c(6.1 KB)
📄 config_file.c(31.7 KB)
📄 constants.c(2.51 KB)
📄 context.c(37.71 KB)
📄 convert_creds.c(3.46 KB)
📄 copy_host_realm.c(2.66 KB)
📄 crc.c(2.19 KB)
📄 creds.c(8.75 KB)
📄 crypto-aes.c(4.62 KB)
📄 crypto-algs.c(3.04 KB)
📄 crypto-arcfour.c(8.78 KB)
📄 crypto-des-common.c(4.37 KB)
📄 crypto-des.c(8.8 KB)
📄 crypto-des3.c(5.36 KB)
📄 crypto-evp.c(5.45 KB)
📄 crypto-null.c(2.55 KB)
📄 crypto-pk.c(8.4 KB)
📄 crypto-rand.c(3.43 KB)
📄 crypto-stubs.c(3.1 KB)
📄 crypto.c(66.51 KB)
📄 crypto.h(6.5 KB)
📄 data.c(5.66 KB)
📄 deprecated.c(14.72 KB)
📄 derived-key-test.c(6.48 KB)
📄 digest.c(31.6 KB)
📄 doxygen.c(25.72 KB)
📄 eai_to_heim_errno.c(3.46 KB)
📄 error_string.c(8.93 KB)
📄 expand_hostname.c(5.59 KB)
📄 expand_path.c(12.35 KB)
📄 fcache.c(25.36 KB)
📄 free.c(2.01 KB)
📄 free_host_realm.c(2.1 KB)
📄 generate_seq_number.c(2.03 KB)
📄 generate_subkey.c(2.6 KB)
📄 get_addrs.c(8.2 KB)
📄 get_cred.c(38.45 KB)
📄 get_default_principal.c(4.47 KB)
📄 get_default_realm.c(2.74 KB)
📄 get_for_creds.c(13.48 KB)
📄 get_host_realm.c(7.06 KB)
📄 get_in_tkt.c(14.45 KB)
📄 get_port.c(2.04 KB)
📄 heim_err.et(1.7 KB)
📄 init_creds.c(12.11 KB)
📄 init_creds_pw.c(52.57 KB)
📄 k524_err.et(577 B)
📄 kcm.c(26.55 KB)
📄 kcm.h(2.83 KB)
📄 kerberos.8(4.14 KB)
📄 keyblock.c(5.31 KB)
📄 keytab.c(23.88 KB)
📄 keytab_any.c(6.48 KB)
📄 keytab_file.c(19.7 KB)
📄 keytab_keyfile.c(10.74 KB)
📄 keytab_memory.c(6.29 KB)
📄 krb5-private.h(12.91 KB)
📄 krb5-protos.h(113.43 KB)
📄 krb5-v4compat.h(4.44 KB)
📄 krb5.conf.5(18.31 KB)
📄 krb5.h(29.75 KB)
📄 krb5.moduli(1.11 KB)
📄 krb524_convert_creds_kdc.3(3.12 KB)
📄 krb5_425_conv_principal.3(7.02 KB)
📄 krb5_acl_match_file.3(3.49 KB)
📄 krb5_aname_to_localname.3(2.87 KB)
📄 krb5_appdefault.3(3.08 KB)
📄 krb5_auth_context.3(10.8 KB)
📄 krb5_c_make_checksum.3(6.92 KB)
📄 krb5_ccapi.h(7.52 KB)
📄 krb5_check_transited.3(3.28 KB)
📄 krb5_create_checksum.3(6.02 KB)
📄 krb5_creds.3(3.31 KB)
📄 krb5_digest.3(6.57 KB)
📄 krb5_eai_to_heim_errno.3(2.4 KB)
📄 krb5_encrypt.3(7 KB)
📄 krb5_err.et(12.86 KB)
📄 krb5_find_padata.3(2.53 KB)
📄 krb5_generate_random_block.3(2.1 KB)
📄 krb5_get_all_client_addrs.3(2.83 KB)
📄 krb5_get_credentials.3(5.03 KB)
📄 krb5_get_creds.3(5.28 KB)
📄 krb5_get_forwarded_creds.3(2.74 KB)
📄 krb5_get_in_cred.3(7.46 KB)
📄 krb5_get_init_creds.3(11.03 KB)
📄 krb5_get_krbhst.3(3.26 KB)
📄 krb5_getportbyname.3(2.32 KB)
📄 krb5_init_context.3(7.88 KB)
📄 krb5_is_thread_safe.3(2.24 KB)
📄 krb5_krbhst_init.3(5.67 KB)
📄 krb5_locl.h(8.47 KB)
📄 krb5_mk_req.3(5.18 KB)
📄 krb5_mk_safe.3(2.78 KB)
📄 krb5_openlog.3(7.96 KB)
📄 krb5_parse_name.3(2.57 KB)
📄 krb5_principal.3(11.85 KB)
📄 krb5_rcache.3(4.21 KB)
📄 krb5_rd_error.3(3.33 KB)
📄 krb5_rd_safe.3(2.77 KB)
📄 krb5_set_default_realm.3(4.29 KB)
📄 krb5_set_password.3(4.11 KB)
📄 krb5_string_to_key.3(4.39 KB)
📄 krb5_timeofday.3(3.33 KB)
📄 krb5_verify_init_creds.3(3.51 KB)
📄 krb5_verify_user.3(6.71 KB)
📄 krb_err.et(2.55 KB)
📄 krbhst-test.c(3.02 KB)
📄 krbhst.c(26.94 KB)
📄 kuserok.c(8.14 KB)
📄 locate_plugin.h(2.36 KB)
📄 log.c(11.94 KB)
📄 mcache.c(11.54 KB)
📄 misc.c(3.9 KB)
📄 mit_glue.c(11.14 KB)
📄 mk_error.c(3.23 KB)
📄 mk_priv.c(4.54 KB)
📄 mk_rep.c(3.99 KB)
📄 mk_req.c(3.58 KB)
📄 mk_req_ext.c(4.78 KB)
📄 mk_safe.c(4.36 KB)
📄 n-fold-test.c(4.14 KB)
📄 n-fold.c(3.8 KB)
📄 net_read.c(1.86 KB)
📄 net_write.c(3.05 KB)
📄 pac.c(28.37 KB)
📄 padata.c(2.35 KB)
📄 parse-name-test.c(5.81 KB)
📄 pcache.c(2.33 KB)
📄 pkinit.c(63.8 KB)
📄 plugin.c(13.71 KB)
📄 principal.c(28.4 KB)
📄 prog_setup.c(2.34 KB)
📄 prompter_posix.c(2.45 KB)
📄 rd_cred.c(9.44 KB)
📄 rd_error.c(3.83 KB)
📄 rd_priv.c(5.38 KB)
📄 rd_rep.c(3.72 KB)
📄 rd_req.c(25.6 KB)
📄 rd_safe.c(6.34 KB)
📄 read_message.c(3.22 KB)
📄 recvauth.c(6.16 KB)
📄 replay.c(8.24 KB)
📄 salt-aes.c(3.34 KB)
📄 salt-arcfour.c(3.24 KB)
📄 salt-des.c(6.68 KB)
📄 salt-des3.c(4.36 KB)
📄 salt.c(9 KB)
📄 scache.c(32.86 KB)
📄 send_to_kdc.c(16.06 KB)
📄 send_to_kdc_plugin.h(2.22 KB)
📄 sendauth.c(6.12 KB)
📄 set_default_realm.c(3.01 KB)
📄 sock_principal.c(2.52 KB)
📄 store-int.c(2.14 KB)
📄 store-int.h(2.07 KB)
📄 store-test.c(3.63 KB)
📄 store.c(35.77 KB)
📄 store_emem.c(5.06 KB)
📄 store_fd.c(3.4 KB)
📄 store_mem.c(5.42 KB)
📄 string-to-key-test.c(5.75 KB)
📄 test_acl.c(4.56 KB)
📄 test_addr.c(7.27 KB)
📄 test_alname.c(4.28 KB)
📄 test_cc.c(19.39 KB)
📄 test_config.c(7.92 KB)
📄 test_crypto.c(5.68 KB)
📄 test_crypto_wrapping.c(4.48 KB)
📄 test_forward.c(3.64 KB)
📄 test_get_addrs.c(3.21 KB)
📄 test_hostname.c(3.82 KB)
📄 test_keytab.c(7.42 KB)
📄 test_kuserok.c(2.9 KB)
📄 test_mem.c(2.21 KB)
📄 test_pac.c(15.1 KB)
📄 test_pkinit_dh2key.c(6.9 KB)
📄 test_plugin.c(3.4 KB)
📄 test_prf.c(3.21 KB)
📄 test_princ.c(10.44 KB)
📄 test_renew.c(3.22 KB)
📄 test_store.c(7.96 KB)
📄 test_time.c(2.57 KB)
📄 ticket.c(21.91 KB)
📄 time.c(3.84 KB)
📄 transited.c(11.11 KB)
📄 verify_init.c(6.47 KB)
📄 verify_krb5_conf.8(3.41 KB)
📄 verify_krb5_conf.c(20.63 KB)
📄 verify_user.c(7 KB)
📄 version-script.map(18.82 KB)
📄 version.c(1.71 KB)
📄 warn.c(8.98 KB)
📄 write_message.c(2.87 KB)

Editing: keytab_file.c

/*
 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "krb5_locl.h"

#define KRB5_KT_VNO_1 1
#define KRB5_KT_VNO_2 2
#define KRB5_KT_VNO   KRB5_KT_VNO_2

#define KRB5_KT_FL_JAVA 1

/* file operations -------------------------------------------- */

struct fkt_data {
    char *filename;
    int flags;
};

static krb5_error_code
krb5_kt_ret_data(krb5_context context,
		 krb5_storage *sp,
		 krb5_data *data)
{
    int ret;
    int16_t size;
    ret = krb5_ret_int16(sp, &size);
    if(ret)
	return ret;
    data->length = size;
    data->data = malloc(size);
    if (data->data == NULL) {
	krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
	return ENOMEM;
    }
    ret = krb5_storage_read(sp, data->data, size);
    if(ret != size)
	return (ret < 0)? errno : KRB5_KT_END;
    return 0;
}

static krb5_error_code
krb5_kt_ret_string(krb5_context context,
		   krb5_storage *sp,
		   heim_general_string *data)
{
    int ret;
    int16_t size;
    ret = krb5_ret_int16(sp, &size);
    if(ret)
	return ret;
    *data = malloc(size + 1);
    if (*data == NULL) {
	krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
	return ENOMEM;
    }
    ret = krb5_storage_read(sp, *data, size);
    (*data)[size] = '\0';
    if(ret != size)
	return (ret < 0)? errno : KRB5_KT_END;
    return 0;
}

static krb5_error_code
krb5_kt_store_data(krb5_context context,
		   krb5_storage *sp,
		   krb5_data data)
{
    int ret;
    ret = krb5_store_int16(sp, data.length);
    if(ret < 0)
	return ret;
    ret = krb5_storage_write(sp, data.data, data.length);
    if(ret != (int)data.length){
	if(ret < 0)
	    return errno;
	return KRB5_KT_END;
    }
    return 0;
}

static krb5_error_code
krb5_kt_store_string(krb5_storage *sp,
		     heim_general_string data)
{
    int ret;
    size_t len = strlen(data);
    ret = krb5_store_int16(sp, len);
    if(ret < 0)
	return ret;
    ret = krb5_storage_write(sp, data, len);
    if(ret != (int)len){
	if(ret < 0)
	    return errno;
	return KRB5_KT_END;
    }
    return 0;
}

static krb5_error_code
krb5_kt_ret_keyblock(krb5_context context,
		     struct fkt_data *fkt,
		     krb5_storage *sp,
		     krb5_keyblock *p)
{
    int ret;
    int16_t tmp;

ret = krb5_ret_int16(sp, &tmp); /* keytype + etype */
    if(ret)  {
	krb5_set_error_message(context, ret,
			       N_("Cant read keyblock from file %s", ""),
			       fkt->filename);
	return ret;
    }
    p->keytype = tmp;
    ret = krb5_kt_ret_data(context, sp, &p->keyvalue);
    if (ret)
	krb5_set_error_message(context, ret,
			       N_("Cant read keyblock from file %s", ""),
			       fkt->filename);
    return ret;
}

static krb5_error_code
krb5_kt_store_keyblock(krb5_context context,
		       struct fkt_data *fkt,
		       krb5_storage *sp,
		       krb5_keyblock *p)
{
    int ret;

ret = krb5_store_int16(sp, p->keytype); /* keytype + etype */
    if(ret) {
	krb5_set_error_message(context, ret,
			       N_("Cant store keyblock to file %s", ""),
			       fkt->filename);
	return ret;
    }
    ret = krb5_kt_store_data(context, sp, p->keyvalue);
    if (ret)
	krb5_set_error_message(context, ret,
			       N_("Cant store keyblock to file %s", ""),
			       fkt->filename);
    return ret;
}

static krb5_error_code
krb5_kt_ret_principal(krb5_context context,
		      struct fkt_data *fkt,
		      krb5_storage *sp,
		      krb5_principal *princ)
{
    size_t i;
    int ret;
    krb5_principal p;
    int16_t len;

ALLOC(p, 1);
    if(p == NULL) {
	krb5_set_error_message(context, ENOMEM,
			       N_("malloc: out of memory", ""));
	return ENOMEM;
    }

ret = krb5_ret_int16(sp, &len);
    if(ret) {
	krb5_set_error_message(context, ret,
			       N_("Failed decoding length of "
				  "keytab principal in keytab file %s", ""),
			       fkt->filename);
	goto out;
    }
    if(krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS))
	len--;
    if (len < 0) {
	ret = KRB5_KT_END;
	krb5_set_error_message(context, ret,
			       N_("Keytab principal contains "
				  "invalid length in keytab %s", ""),
			       fkt->filename);
	goto out;
    }
    ret = krb5_kt_ret_string(context, sp, &p->realm);
    if(ret) {
	krb5_set_error_message(context, ret,
			       N_("Can't read realm from keytab: %s", ""),
			       fkt->filename);
	goto out;
    }
    p->name.name_string.val = calloc(len, sizeof(*p->name.name_string.val));
    if(p->name.name_string.val == NULL) {
	ret = ENOMEM;
	krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
	goto out;
    }
    p->name.name_string.len = len;
    for(i = 0; i < p->name.name_string.len; i++){
	ret = krb5_kt_ret_string(context, sp, p->name.name_string.val + i);
	if(ret) {
	    krb5_set_error_message(context, ret,
				   N_("Can't read principal from "
				      "keytab: %s", ""),
				   fkt->filename);
	    goto out;
	}
    }
    if (krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE))
	p->name.name_type = KRB5_NT_UNKNOWN;
    else {
	int32_t tmp32;
	ret = krb5_ret_int32(sp, &tmp32);
	p->name.name_type = tmp32;
	if (ret) {
	    krb5_set_error_message(context, ret,
				   N_("Can't read name-type from "
				      "keytab: %s", ""),
				   fkt->filename);
	    goto out;
	}
    }
    *princ = p;
    return 0;
out:
    krb5_free_principal(context, p);
    return ret;
}

static krb5_error_code
krb5_kt_store_principal(krb5_context context,
			krb5_storage *sp,
			krb5_principal p)
{
    size_t i;
    int ret;

if(krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS))
	ret = krb5_store_int16(sp, p->name.name_string.len + 1);
    else
	ret = krb5_store_int16(sp, p->name.name_string.len);
    if(ret) return ret;
    ret = krb5_kt_store_string(sp, p->realm);
    if(ret) return ret;
    for(i = 0; i < p->name.name_string.len; i++){
	ret = krb5_kt_store_string(sp, p->name.name_string.val[i]);
	if(ret)
	    return ret;
    }
    if(!krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE)) {
	ret = krb5_store_int32(sp, p->name.name_type);
	if(ret)
	    return ret;
    }

return 0;
}

static krb5_error_code KRB5_CALLCONV
fkt_resolve(krb5_context context, const char *name, krb5_keytab id)
{
    struct fkt_data *d;

d = malloc(sizeof(*d));
    if(d == NULL) {
	krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
	return ENOMEM;
    }
    d->filename = strdup(name);
    if(d->filename == NULL) {
	free(d);
	krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
	return ENOMEM;
    }
    d->flags = 0;
    id->data = d;
    return 0;
}

static krb5_error_code KRB5_CALLCONV
fkt_resolve_java14(krb5_context context, const char *name, krb5_keytab id)
{
    krb5_error_code ret;

ret = fkt_resolve(context, name, id);
    if (ret == 0) {
	struct fkt_data *d = id->data;
	d->flags |= KRB5_KT_FL_JAVA;
    }
    return ret;
}

static krb5_error_code KRB5_CALLCONV
fkt_close(krb5_context context, krb5_keytab id)
{
    struct fkt_data *d = id->data;
    free(d->filename);
    free(d);
    return 0;
}

static krb5_error_code KRB5_CALLCONV
fkt_destroy(krb5_context context, krb5_keytab id)
{
    struct fkt_data *d = id->data;
    _krb5_erase_file(context, d->filename);
    return 0;
}

static krb5_error_code KRB5_CALLCONV
fkt_get_name(krb5_context context,
	     krb5_keytab id,
	     char *name,
	     size_t namesize)
{
    /* This function is XXX */
    struct fkt_data *d = id->data;
    strlcpy(name, d->filename, namesize);
    return 0;
}

static void
storage_set_flags(krb5_context context, krb5_storage *sp, int vno)
{
    int flags = 0;
    switch(vno) {
    case KRB5_KT_VNO_1:
	flags |= KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS;
	flags |= KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE;
	flags |= KRB5_STORAGE_HOST_BYTEORDER;
	break;
    case KRB5_KT_VNO_2:
	break;
    default:
	krb5_warnx(context,
		   "storage_set_flags called with bad vno (%d)", vno);
    }
    krb5_storage_set_flags(sp, flags);
}

static krb5_error_code
fkt_start_seq_get_int(krb5_context context,
		      krb5_keytab id,
		      int flags,
		      int exclusive,
		      krb5_kt_cursor *c)
{
    int8_t pvno, tag;
    krb5_error_code ret;
    struct fkt_data *d = id->data;

c->fd = open (d->filename, flags);
    if (c->fd < 0) {
	ret = errno;
	krb5_set_error_message(context, ret,
			       N_("keytab %s open failed: %s", ""),
			       d->filename, strerror(ret));
	return ret;
    }
    rk_cloexec(c->fd);
    ret = _krb5_xlock(context, c->fd, exclusive, d->filename);
    if (ret) {
	close(c->fd);
	return ret;
    }
    c->sp = krb5_storage_from_fd(c->fd);
    if (c->sp == NULL) {
	_krb5_xunlock(context, c->fd);
	close(c->fd);
	krb5_set_error_message(context, ENOMEM,
			       N_("malloc: out of memory", ""));
	return ENOMEM;
    }
    krb5_storage_set_eof_code(c->sp, KRB5_KT_END);
    ret = krb5_ret_int8(c->sp, &pvno);
    if(ret) {
	krb5_storage_free(c->sp);
	_krb5_xunlock(context, c->fd);
	close(c->fd);
	krb5_clear_error_message(context);
	return ret;
    }
    if(pvno != 5) {
	krb5_storage_free(c->sp);
	_krb5_xunlock(context, c->fd);
	close(c->fd);
	krb5_clear_error_message (context);
	return KRB5_KEYTAB_BADVNO;
    }
    ret = krb5_ret_int8(c->sp, &tag);
    if (ret) {
	krb5_storage_free(c->sp);
	_krb5_xunlock(context, c->fd);
	close(c->fd);
	krb5_clear_error_message(context);
	return ret;
    }
    id->version = tag;
    storage_set_flags(context, c->sp, id->version);
    return 0;
}

static krb5_error_code KRB5_CALLCONV
fkt_start_seq_get(krb5_context context,
		  krb5_keytab id,
		  krb5_kt_cursor *c)
{
    return fkt_start_seq_get_int(context, id, O_RDONLY | O_BINARY | O_CLOEXEC, 0, c);
}

static krb5_error_code
fkt_next_entry_int(krb5_context context,
		   krb5_keytab id,
		   krb5_keytab_entry *entry,
		   krb5_kt_cursor *cursor,
		   off_t *start,
		   off_t *end)
{
    struct fkt_data *d = id->data;
    int32_t len;
    int ret;
    int8_t tmp8;
    int32_t tmp32;
    uint32_t utmp32;
    off_t pos, curpos;

pos = krb5_storage_seek(cursor->sp, 0, SEEK_CUR);
loop:
    ret = krb5_ret_int32(cursor->sp, &len);
    if (ret)
	return ret;
    if(len < 0) {
	pos = krb5_storage_seek(cursor->sp, -len, SEEK_CUR);
	goto loop;
    }
    ret = krb5_kt_ret_principal (context, d, cursor->sp, &entry->principal);
    if (ret)
	goto out;
    ret = krb5_ret_uint32(cursor->sp, &utmp32);
    entry->timestamp = utmp32;
    if (ret)
	goto out;
    ret = krb5_ret_int8(cursor->sp, &tmp8);
    if (ret)
	goto out;
    entry->vno = tmp8;
    ret = krb5_kt_ret_keyblock (context, d, cursor->sp, &entry->keyblock);
    if (ret)
	goto out;
    /* there might be a 32 bit kvno here
     * if it's zero, assume that the 8bit one was right,
     * otherwise trust the new value */
    curpos = krb5_storage_seek(cursor->sp, 0, SEEK_CUR);
    if(len + 4 + pos - curpos >= 4) {
	ret = krb5_ret_int32(cursor->sp, &tmp32);
	if (ret == 0 && tmp32 != 0)
	    entry->vno = tmp32;
    }
    /* there might be a flags field here */
    if(len + 4 + pos - curpos >= 8) {
	ret = krb5_ret_uint32(cursor->sp, &utmp32);
	if (ret == 0)
	    entry->flags = utmp32;
    } else
	entry->flags = 0;

entry->aliases = NULL;

if(start) *start = pos;
    if(end) *end = pos + 4 + len;
 out:
    krb5_storage_seek(cursor->sp, pos + 4 + len, SEEK_SET);
    return ret;
}

static krb5_error_code KRB5_CALLCONV
fkt_next_entry(krb5_context context,
	       krb5_keytab id,
	       krb5_keytab_entry *entry,
	       krb5_kt_cursor *cursor)
{
    return fkt_next_entry_int(context, id, entry, cursor, NULL, NULL);
}

static krb5_error_code KRB5_CALLCONV
fkt_end_seq_get(krb5_context context,
		krb5_keytab id,
		krb5_kt_cursor *cursor)
{
    krb5_storage_free(cursor->sp);
    _krb5_xunlock(context, cursor->fd);
    close(cursor->fd);
    return 0;
}

static krb5_error_code KRB5_CALLCONV
fkt_setup_keytab(krb5_context context,
		 krb5_keytab id,
		 krb5_storage *sp)
{
    krb5_error_code ret;
    ret = krb5_store_int8(sp, 5);
    if(ret)
	return ret;
    if(id->version == 0)
	id->version = KRB5_KT_VNO;
    return krb5_store_int8 (sp, id->version);
}

static krb5_error_code KRB5_CALLCONV
fkt_add_entry(krb5_context context,
	      krb5_keytab id,
	      krb5_keytab_entry *entry)
{
    int ret;
    int fd;
    krb5_storage *sp;
    struct fkt_data *d = id->data;
    krb5_data keytab;
    int32_t len;

fd = open (d->filename, O_RDWR | O_BINARY | O_CLOEXEC);
    if (fd < 0) {
	fd = open (d->filename, O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_CLOEXEC, 0600);
	if (fd < 0) {
	    ret = errno;
	    krb5_set_error_message(context, ret,
				   N_("open(%s): %s", ""), d->filename,
				   strerror(ret));
	    return ret;
	}
	rk_cloexec(fd);

ret = _krb5_xlock(context, fd, 1, d->filename);
	if (ret) {
	    close(fd);
	    return ret;
	}
	sp = krb5_storage_from_fd(fd);
	krb5_storage_set_eof_code(sp, KRB5_KT_END);
	ret = fkt_setup_keytab(context, id, sp);
	if(ret) {
	    goto out;
	}
	storage_set_flags(context, sp, id->version);
    } else {
	int8_t pvno, tag;

rk_cloexec(fd);

ret = _krb5_xlock(context, fd, 1, d->filename);
	if (ret) {
	    close(fd);
	    return ret;
	}
	sp = krb5_storage_from_fd(fd);
	krb5_storage_set_eof_code(sp, KRB5_KT_END);
	ret = krb5_ret_int8(sp, &pvno);
	if(ret) {
	    /* we probably have a zero byte file, so try to set it up
               properly */
	    ret = fkt_setup_keytab(context, id, sp);
	    if(ret) {
		krb5_set_error_message(context, ret,
				       N_("%s: keytab is corrupted: %s", ""),
				       d->filename, strerror(ret));
		goto out;
	    }
	    storage_set_flags(context, sp, id->version);
	} else {
	    if(pvno != 5) {
		ret = KRB5_KEYTAB_BADVNO;
		krb5_set_error_message(context, ret,
				       N_("Bad version in keytab %s", ""),
				       d->filename);
		goto out;
	    }
	    ret = krb5_ret_int8 (sp, &tag);
	    if (ret) {
		krb5_set_error_message(context, ret,
				       N_("failed reading tag from "
					  "keytab %s", ""),
				       d->filename);
		goto out;
	    }
	    id->version = tag;
	    storage_set_flags(context, sp, id->version);
	}
    }

{
	krb5_storage *emem;
	emem = krb5_storage_emem();
	if(emem == NULL) {
	    ret = ENOMEM;
	    krb5_set_error_message(context, ret,
				   N_("malloc: out of memory", ""));
	    goto out;
	}
	ret = krb5_kt_store_principal(context, emem, entry->principal);
	if(ret) {
	    krb5_set_error_message(context, ret,
				   N_("Failed storing principal "
				      "in keytab %s", ""),
				   d->filename);
	    krb5_storage_free(emem);
	    goto out;
	}
	ret = krb5_store_int32 (emem, entry->timestamp);
	if(ret) {
	    krb5_set_error_message(context, ret,
				   N_("Failed storing timpstamp "
				      "in keytab %s", ""),
				   d->filename);
	    krb5_storage_free(emem);
	    goto out;
	}
	ret = krb5_store_int8 (emem, entry->vno % 256);
	if(ret) {
	    krb5_set_error_message(context, ret,
				   N_("Failed storing kvno "
				      "in keytab %s", ""),
				   d->filename);
	    krb5_storage_free(emem);
	    goto out;
	}
	ret = krb5_kt_store_keyblock (context, d, emem, &entry->keyblock);
	if(ret) {
	    krb5_storage_free(emem);
	    goto out;
	}
	if ((d->flags & KRB5_KT_FL_JAVA) == 0) {
	    ret = krb5_store_int32 (emem, entry->vno);
	    if (ret) {
		krb5_set_error_message(context, ret,
				       N_("Failed storing extended kvno "
					  "in keytab %s", ""),
				       d->filename);
		krb5_storage_free(emem);
		goto out;
	    }
	    ret = krb5_store_uint32 (emem, entry->flags);
	    if (ret) {
		krb5_set_error_message(context, ret,
				       N_("Failed storing extended kvno "
					  "in keytab %s", ""),
				       d->filename);
		krb5_storage_free(emem);
		goto out;
	    }
	}

ret = krb5_storage_to_data(emem, &keytab);
	krb5_storage_free(emem);
	if(ret) {
	    krb5_set_error_message(context, ret,
				   N_("Failed converting keytab entry "
				      "to memory block for keytab %s", ""),
				   d->filename);
	    goto out;
	}
    }

while(1) {
	ret = krb5_ret_int32(sp, &len);
	if(ret == KRB5_KT_END) {
	    len = keytab.length;
	    break;
	}
	if(len < 0) {
	    len = -len;
	    if(len >= (int)keytab.length) {
		krb5_storage_seek(sp, -4, SEEK_CUR);
		break;
	    }
	}
	krb5_storage_seek(sp, len, SEEK_CUR);
    }
    ret = krb5_store_int32(sp, len);
    if(krb5_storage_write(sp, keytab.data, keytab.length) < 0) {
	ret = errno;
	krb5_set_error_message(context, ret,
			       N_("Failed writing keytab block "
				  "in keytab %s: %s", ""),
			       d->filename, strerror(ret));
    }
    memset(keytab.data, 0, keytab.length);
    krb5_data_free(&keytab);
  out:
    krb5_storage_free(sp);
    _krb5_xunlock(context, fd);
    close(fd);
    return ret;
}

static krb5_error_code KRB5_CALLCONV
fkt_remove_entry(krb5_context context,
		 krb5_keytab id,
		 krb5_keytab_entry *entry)
{
    krb5_keytab_entry e;
    krb5_kt_cursor cursor;
    off_t pos_start, pos_end;
    int found = 0;
    krb5_error_code ret;

ret = fkt_start_seq_get_int(context, id, O_RDWR | O_BINARY | O_CLOEXEC, 1, &cursor);
    if(ret != 0)
	goto out; /* return other error here? */
    while(fkt_next_entry_int(context, id, &e, &cursor,
			     &pos_start, &pos_end) == 0) {
	if(krb5_kt_compare(context, &e, entry->principal,
			   entry->vno, entry->keyblock.keytype)) {
	    int32_t len;
	    unsigned char buf[128];
	    found = 1;
	    krb5_storage_seek(cursor.sp, pos_start, SEEK_SET);
	    len = pos_end - pos_start - 4;
	    krb5_store_int32(cursor.sp, -len);
	    memset(buf, 0, sizeof(buf));
	    while(len > 0) {
		krb5_storage_write(cursor.sp, buf,
		    min((size_t)len, sizeof(buf)));
		len -= min((size_t)len, sizeof(buf));
	    }
	}
	krb5_kt_free_entry(context, &e);
    }
    krb5_kt_end_seq_get(context, id, &cursor);
  out:
    if (!found) {
	krb5_clear_error_message (context);
	return KRB5_KT_NOTFOUND;
    }
    return 0;
}

const krb5_kt_ops krb5_fkt_ops = {
    "FILE",
    fkt_resolve,
    fkt_get_name,
    fkt_close,
    fkt_destroy,
    NULL, /* get */
    fkt_start_seq_get,
    fkt_next_entry,
    fkt_end_seq_get,
    fkt_add_entry,
    fkt_remove_entry
};

const krb5_kt_ops krb5_wrfkt_ops = {
    "WRFILE",
    fkt_resolve,
    fkt_get_name,
    fkt_close,
    fkt_destroy,
    NULL, /* get */
    fkt_start_seq_get,
    fkt_next_entry,
    fkt_end_seq_get,
    fkt_add_entry,
    fkt_remove_entry
};

const krb5_kt_ops krb5_javakt_ops = {
    "JAVA14",
    fkt_resolve_java14,
    fkt_get_name,
    fkt_close,
    fkt_destroy,
    NULL, /* get */
    fkt_start_seq_get,
    fkt_next_entry,
    fkt_end_seq_get,
    fkt_add_entry,
    fkt_remove_entry
};

003 File Manager

Editing: keytab_file.c

Upload File

Create Folder