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heimdal/lib/hdb/hdb-ldap.c
Joseph Sutton 806bf5f571 hdb: Initialize ‘tm’ structure 
‘tm’ must be initialized prior to calling strptime().

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2023-11-02 20:19:54 -05:00

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/*
* Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
* Copyright (c) 2004, Andrew Bartlett.
* Copyright (c) 2003 - 2008, Kungliga Tekniska Högskolan.
* Copyright (c) 2015, Timothy Pearson.
* 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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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 "hdb_locl.h"
#ifdef OPENLDAP
#include <lber.h>
#include <ldap.h>
#include <sys/un.h>
#include <hex.h>
static krb5_error_code LDAP__connect(krb5_context context, HDB *);
static krb5_error_code LDAP_close(krb5_context context, HDB *);
static krb5_error_code
LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
int flags, hdb_entry * ent);
static const char *default_structural_object = "account";
static char *structural_object;
static const char *default_ldap_url = "ldapi:///";
static krb5_boolean samba_forwardable;
struct hdbldapdb {
LDAP *h_lp;
int h_msgid;
char *h_base;
char *h_url;
char *h_bind_dn;
char *h_bind_password;
krb5_boolean h_start_tls;
char *h_createbase;
};
#define HDB2LDAP(db) (((struct hdbldapdb *)(db)->hdb_db)->h_lp)
#define HDB2MSGID(db) (((struct hdbldapdb *)(db)->hdb_db)->h_msgid)
#define HDBSETMSGID(db,msgid) \
do { ((struct hdbldapdb *)(db)->hdb_db)->h_msgid = msgid; } while(0)
#define HDB2BASE(dn) (((struct hdbldapdb *)(db)->hdb_db)->h_base)
#define HDB2URL(dn) (((struct hdbldapdb *)(db)->hdb_db)->h_url)
#define HDB2BINDDN(db) (((struct hdbldapdb *)(db)->hdb_db)->h_bind_dn)
#define HDB2BINDPW(db) (((struct hdbldapdb *)(db)->hdb_db)->h_bind_password)
#define HDB2CREATE(db) (((struct hdbldapdb *)(db)->hdb_db)->h_createbase)
/*
*
*/
static char * krb5kdcentry_attrs[] = {
"cn",
"createTimestamp",
"creatorsName",
"krb5EncryptionType",
"krb5KDCFlags",
"krb5Key",
"krb5KeyVersionNumber",
"krb5MaxLife",
"krb5MaxRenew",
"krb5PasswordEnd",
"krb5PrincipalName",
"krb5PrincipalRealm",
"krb5ExtendedAttributes",
"krb5ValidEnd",
"krb5ValidStart",
"modifiersName",
"modifyTimestamp",
"objectClass",
"sambaAcctFlags",
"sambaKickoffTime",
"sambaNTPassword",
"sambaPwdLastSet",
"sambaPwdMustChange",
"uid",
NULL
};
static char *krb5principal_attrs[] = {
"cn",
"createTimestamp",
"creatorsName",
"krb5PrincipalName",
"krb5PrincipalRealm",
"modifiersName",
"modifyTimestamp",
"objectClass",
"uid",
NULL
};
static int
LDAP_no_size_limit(krb5_context context, LDAP *lp)
{
int ret, limit = LDAP_NO_LIMIT;
ret = ldap_set_option(lp, LDAP_OPT_SIZELIMIT, (const void *)&limit);
if (ret != LDAP_SUCCESS) {
krb5_set_error_message(context, HDB_ERR_BADVERSION,
"ldap_set_option: %s",
ldap_err2string(ret));
return HDB_ERR_BADVERSION;
}
return 0;
}
static int
check_ldap(krb5_context context, HDB *db, int ret)
{
switch (ret) {
case LDAP_SUCCESS:
return 0;
case LDAP_SERVER_DOWN:
LDAP_close(context, db);
return 1;
default:
return 1;
}
}
static krb5_error_code
LDAP__setmod(LDAPMod *** modlist, int modop, const char *attribute,
int *pIndex)
{
int cMods;
if (*modlist == NULL) {
*modlist = (LDAPMod **)ber_memcalloc(1, sizeof(LDAPMod *));
if (*modlist == NULL)
return ENOMEM;
}
for (cMods = 0; (*modlist)[cMods] != NULL; cMods++) {
if ((*modlist)[cMods]->mod_op == modop &&
strcasecmp((*modlist)[cMods]->mod_type, attribute) == 0) {
break;
}
}
*pIndex = cMods;
if ((*modlist)[cMods] == NULL) {
LDAPMod *mod;
*modlist = (LDAPMod **)ber_memrealloc(*modlist,
(cMods + 2) * sizeof(LDAPMod *));
if (*modlist == NULL)
return ENOMEM;
(*modlist)[cMods] = (LDAPMod *)ber_memalloc(sizeof(LDAPMod));
if ((*modlist)[cMods] == NULL)
return ENOMEM;
mod = (*modlist)[cMods];
mod->mod_op = modop;
mod->mod_type = ber_strdup(attribute);
if (mod->mod_type == NULL) {
ber_memfree(mod);
(*modlist)[cMods] = NULL;
return ENOMEM;
}
if (modop & LDAP_MOD_BVALUES) {
mod->mod_bvalues = NULL;
} else {
mod->mod_values = NULL;
}
(*modlist)[cMods + 1] = NULL;
}
return 0;
}
static krb5_error_code
LDAP_addmod_len(LDAPMod *** modlist, int modop, const char *attribute,
unsigned char *value, size_t len)
{
krb5_error_code ret;
int cMods, i = 0;
ret = LDAP__setmod(modlist, modop | LDAP_MOD_BVALUES, attribute, &cMods);
if (ret)
return ret;
if (value != NULL) {
struct berval **bv;
bv = (*modlist)[cMods]->mod_bvalues;
if (bv != NULL) {
for (i = 0; bv[i] != NULL; i++)
;
bv = ber_memrealloc(bv, (i + 2) * sizeof(*bv));
} else
bv = ber_memalloc(2 * sizeof(*bv));
if (bv == NULL)
return ENOMEM;
(*modlist)[cMods]->mod_bvalues = bv;
bv[i] = ber_memalloc(sizeof(**bv));;
if (bv[i] == NULL)
return ENOMEM;
bv[i]->bv_val = (void *)value;
bv[i]->bv_len = len;
bv[i + 1] = NULL;
}
return 0;
}
static krb5_error_code
LDAP_addmod(LDAPMod *** modlist, int modop, const char *attribute,
const char *value)
{
int cMods, i = 0;
krb5_error_code ret;
ret = LDAP__setmod(modlist, modop, attribute, &cMods);
if (ret)
return ret;
if (value != NULL) {
char **bv;
bv = (*modlist)[cMods]->mod_values;
if (bv != NULL) {
for (i = 0; bv[i] != NULL; i++)
;
bv = ber_memrealloc(bv, (i + 2) * sizeof(*bv));
} else
bv = ber_memalloc(2 * sizeof(*bv));
if (bv == NULL)
return ENOMEM;
(*modlist)[cMods]->mod_values = bv;
bv[i] = ber_strdup(value);
if (bv[i] == NULL)
return ENOMEM;
bv[i + 1] = NULL;
}
return 0;
}
static krb5_error_code
LDAP_addmod_generalized_time(LDAPMod *** mods, int modop,
const char *attribute, KerberosTime * time)
{
char buf[22];
struct tm *tm;
/* XXX not threadsafe */
tm = gmtime(time);
strftime(buf, sizeof(buf), "%Y%m%d%H%M%SZ", tm);
return LDAP_addmod(mods, modop, attribute, buf);
}
static krb5_error_code
LDAP_addmod_integer(krb5_context context,
LDAPMod *** mods, int modop,
const char *attribute, unsigned long l)
{
krb5_error_code ret;
char *buf;
ret = asprintf(&buf, "%ld", l);
if (ret < 0) {
krb5_set_error_message(context, ENOMEM,
"asprintf: out of memory:");
return ENOMEM;
}
ret = LDAP_addmod(mods, modop, attribute, buf);
free (buf);
return ret;
}
static krb5_error_code
LDAP_get_string_value(HDB * db, LDAPMessage * entry,
const char *attribute, char **ptr)
{
struct berval **vals;
vals = ldap_get_values_len(HDB2LDAP(db), entry, attribute);
if (vals == NULL || vals[0] == NULL) {
*ptr = NULL;
return HDB_ERR_NOENTRY;
}
*ptr = malloc(vals[0]->bv_len + 1);
if (*ptr == NULL) {
ldap_value_free_len(vals);
return ENOMEM;
}
memcpy(*ptr, vals[0]->bv_val, vals[0]->bv_len);
(*ptr)[vals[0]->bv_len] = 0;
ldap_value_free_len(vals);
return 0;
}
static krb5_error_code
LDAP_get_integer_value(HDB * db, LDAPMessage * entry,
const char *attribute, int *ptr)
{
krb5_error_code ret;
char *val;
ret = LDAP_get_string_value(db, entry, attribute, &val);
if (ret)
return ret;
*ptr = atoi(val);
free(val);
return 0;
}
static krb5_error_code
LDAP_get_generalized_time_value(HDB * db, LDAPMessage * entry,
const char *attribute, KerberosTime * kt)
{
char *tmp, *gentime;
struct tm tm;
int ret;
*kt = 0;
ret = LDAP_get_string_value(db, entry, attribute, &gentime);
if (ret)
return ret;
memset(&tm, 0, sizeof tm);
tmp = strptime(gentime, "%Y%m%d%H%M%SZ", &tm);
if (tmp == NULL) {
free(gentime);
return HDB_ERR_NOENTRY;
}
free(gentime);
*kt = timegm(&tm);
return 0;
}
static int
bervalstrcmp(struct berval *v, const char *str)
{
size_t len = strlen(str);
return (v->bv_len == len) && strncasecmp(str, (char *)v->bv_val, len) == 0;
}
static krb5_error_code
LDAP_entry2mods(krb5_context context, HDB * db, hdb_entry * ent,
LDAPMessage * msg, LDAPMod *** pmods, krb5_boolean *pis_new_entry)
{
krb5_error_code ret;
krb5_boolean is_new_entry = FALSE;
char *tmp = NULL;
LDAPMod **mods = NULL;
hdb_entry orig;
unsigned long oflags, nflags;
int i;
krb5_boolean is_samba_account = FALSE;
krb5_boolean is_account = FALSE;
krb5_boolean is_heimdal_entry = FALSE;
krb5_boolean is_heimdal_principal = FALSE;
struct berval **vals;
*pmods = NULL;
if (msg != NULL) {
ret = LDAP_message2entry(context, db, msg, 0, &orig);
if (ret)
goto out;
vals = ldap_get_values_len(HDB2LDAP(db), msg, "objectClass");
if (vals) {
int num_objectclasses = ldap_count_values_len(vals);
for (i=0; i < num_objectclasses; i++) {
if (bervalstrcmp(vals[i], "sambaSamAccount"))
is_samba_account = TRUE;
else if (bervalstrcmp(vals[i], structural_object))
is_account = TRUE;
else if (bervalstrcmp(vals[i], "krb5Principal"))
is_heimdal_principal = TRUE;
else if (bervalstrcmp(vals[i], "krb5KDCEntry"))
is_heimdal_entry = TRUE;
}
ldap_value_free_len(vals);
}
/*
* If this is just a "account" entry and no other objectclass
* is hanging on this entry, it's really a new entry.
*/
if (is_samba_account == FALSE && is_heimdal_principal == FALSE &&
is_heimdal_entry == FALSE) {
if (is_account == TRUE) {
is_new_entry = TRUE;
} else {
ret = HDB_ERR_NOENTRY;
goto out;
}
}
} else
is_new_entry = TRUE;
if (is_new_entry) {
/* to make it perfectly obvious we're depending on
* orig being intiialized to zero */
memset(&orig, 0, sizeof(orig));
/* account is the structural object class */
if (is_account == FALSE) {
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "top");
if (ret)
goto out;
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass",
structural_object);
is_account = TRUE;
if (ret)
goto out;
}
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "krb5Principal");
is_heimdal_principal = TRUE;
if (ret)
goto out;
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "krb5KDCEntry");
is_heimdal_entry = TRUE;
if (ret)
goto out;
}
if (is_new_entry ||
krb5_principal_compare(context, ent->principal, orig.principal)
== FALSE)
{
if (is_heimdal_principal || is_heimdal_entry) {
ret = krb5_unparse_name(context, ent->principal, &tmp);
if (ret)
goto out;
ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE,
"krb5PrincipalName", tmp);
if (ret) {
free(tmp);
goto out;
}
free(tmp);
}
if (is_account || is_samba_account) {
ret = krb5_unparse_name_short(context, ent->principal, &tmp);
if (ret)
goto out;
ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "uid", tmp);
if (ret) {
free(tmp);
goto out;
}
free(tmp);
}
}
if (is_heimdal_entry && (ent->kvno != orig.kvno || is_new_entry)) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"krb5KeyVersionNumber",
ent->kvno);
if (ret)
goto out;
}
if (is_heimdal_entry && ent->extensions) {
if (!is_new_entry) {
vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5ExtendedAttributes");
if (vals) {
ldap_value_free_len(vals);
ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5ExtendedAttributes", NULL);
if (ret)
goto out;
}
}
for (i = 0; i < ent->extensions->len; i++) {
unsigned char *buf;
size_t size, sz = 0;
ASN1_MALLOC_ENCODE(HDB_extension, buf, size, &ent->extensions->val[i], &sz, ret);
if (ret)
goto out;
if (size != sz)
krb5_abortx(context, "internal error in ASN.1 encoder");
ret = LDAP_addmod_len(&mods, LDAP_MOD_ADD, "krb5ExtendedAttributes", buf, sz);
if (ret)
goto out;
}
}
if (is_heimdal_entry && ent->valid_start) {
if (orig.valid_end == NULL
|| (*(ent->valid_start) != *(orig.valid_start))) {
ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
"krb5ValidStart",
ent->valid_start);
if (ret)
goto out;
}
}
if (ent->valid_end) {
if (orig.valid_end == NULL || (*(ent->valid_end) != *(orig.valid_end))) {
if (is_heimdal_entry) {
ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
"krb5ValidEnd",
ent->valid_end);
if (ret)
goto out;
}
if (is_samba_account) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"sambaKickoffTime",
*(ent->valid_end));
if (ret)
goto out;
}
}
}
if (ent->pw_end) {
if (orig.pw_end == NULL || (*(ent->pw_end) != *(orig.pw_end))) {
if (is_heimdal_entry) {
ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
"krb5PasswordEnd",
ent->pw_end);
if (ret)
goto out;
}
if (is_samba_account) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"sambaPwdMustChange",
*(ent->pw_end));
if (ret)
goto out;
}
}
}
#if 0 /* we we have last_pw_change */
if (is_samba_account && ent->last_pw_change) {
if (orig.last_pw_change == NULL || (*(ent->last_pw_change) != *(orig.last_pw_change))) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"sambaPwdLastSet",
*(ent->last_pw_change));
if (ret)
goto out;
}
}
#endif
if (is_heimdal_entry && ent->max_life) {
if (orig.max_life == NULL
|| (*(ent->max_life) != *(orig.max_life))) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"krb5MaxLife",
*(ent->max_life));
if (ret)
goto out;
}
}
if (is_heimdal_entry && ent->max_renew) {
if (orig.max_renew == NULL
|| (*(ent->max_renew) != *(orig.max_renew))) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"krb5MaxRenew",
*(ent->max_renew));
if (ret)
goto out;
}
}
oflags = HDBFlags2int(orig.flags);
nflags = HDBFlags2int(ent->flags);
if (is_heimdal_entry && oflags != nflags) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"krb5KDCFlags",
nflags);
if (ret)
goto out;
}
/* Remove keys if they exists, and then replace keys. */
if (!is_new_entry && orig.keys.len > 0) {
vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5Key");
if (vals) {
ldap_value_free_len(vals);
ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5Key", NULL);
if (ret)
goto out;
}
}
for (i = 0; i < ent->keys.len; i++) {
if (is_samba_account
&& ent->keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5) {
char *ntHexPassword;
char *nt;
time_t now = time(NULL);
/* the key might have been 'sealed', but samba passwords
are clear in the directory */
ret = hdb_unseal_key(context, db, &ent->keys.val[i]);
if (ret)
goto out;
nt = ent->keys.val[i].key.keyvalue.data;
/* store in ntPassword, not krb5key */
ret = hex_encode(nt, 16, &ntHexPassword);
if (ret < 0) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "hdb-ldap: failed to "
"hex encode key");
goto out;
}
ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "sambaNTPassword",
ntHexPassword);
free(ntHexPassword);
if (ret)
goto out;
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
"sambaPwdLastSet", now);
if (ret)
goto out;
/* have to kill the LM passwod if it exists */
vals = ldap_get_values_len(HDB2LDAP(db), msg, "sambaLMPassword");
if (vals) {
ldap_value_free_len(vals);
ret = LDAP_addmod(&mods, LDAP_MOD_DELETE,
"sambaLMPassword", NULL);
if (ret)
goto out;
}
} else if (is_heimdal_entry) {
unsigned char *buf;
size_t len, buf_size;
ASN1_MALLOC_ENCODE(Key, buf, buf_size, &ent->keys.val[i], &len, ret);
if (ret)
goto out;
if(buf_size != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
/* addmod_len _owns_ the key, doesn't need to copy it */
ret = LDAP_addmod_len(&mods, LDAP_MOD_ADD, "krb5Key", buf, len);
if (ret)
goto out;
}
}
if (ent->etypes) {
int add_krb5EncryptionType = 0;
/*
* Only add/modify krb5EncryptionType if it's a new heimdal
* entry or krb5EncryptionType already exists on the entry.
*/
if (!is_new_entry) {
vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5EncryptionType");
if (vals) {
ldap_value_free_len(vals);
ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5EncryptionType",
NULL);
if (ret)
goto out;
add_krb5EncryptionType = 1;
}
} else if (is_heimdal_entry)
add_krb5EncryptionType = 1;
if (add_krb5EncryptionType) {
for (i = 0; i < ent->etypes->len; i++) {
if (is_samba_account &&
ent->keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5)
{
;
} else if (is_heimdal_entry) {
ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_ADD,
"krb5EncryptionType",
ent->etypes->val[i]);
if (ret)
goto out;
}
}
}
}
/* for clarity */
ret = 0;
out:
*pis_new_entry = is_new_entry;
if (ret == 0)
*pmods = mods;
else if (mods != NULL) {
ldap_mods_free(mods, 1);
*pmods = NULL;
}
if (msg)
hdb_free_entry(context, db, &orig);
return ret;
}
static krb5_error_code
LDAP_dn2principal(krb5_context context, HDB * db, const char *dn,
krb5_principal * principal)
{
krb5_error_code ret;
int rc;
const char *filter = "(objectClass=krb5Principal)";
LDAPMessage *res = NULL, *e;
char *p;
ret = LDAP_no_size_limit(context, HDB2LDAP(db));
if (ret)
goto out;
rc = ldap_search_ext_s(HDB2LDAP(db), dn, LDAP_SCOPE_SUBTREE,
filter, krb5principal_attrs, 0,
NULL, NULL, NULL,
0, &res);
if (check_ldap(context, db, rc)) {
ret = HDB_ERR_NOENTRY;
krb5_set_error_message(context, ret, "ldap_search_ext_s: "
"filter: %s error: %s",
filter, ldap_err2string(rc));
goto out;
}
e = ldap_first_entry(HDB2LDAP(db), res);
if (e == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
ret = LDAP_get_string_value(db, e, "krb5PrincipalName", &p);
if (ret) {
ret = HDB_ERR_NOENTRY;
goto out;
}
ret = krb5_parse_name(context, p, principal);
free(p);
out:
if (res)
ldap_msgfree(res);
return ret;
}
static int
need_quote(unsigned char c)
{
return (c & 0x80) ||
(c < 32) ||
(c == '(') ||
(c == ')') ||
(c == '*') ||
(c == '\\') ||
(c == 0x7f);
}
static const char hexchar[] = "0123456789ABCDEF";
static krb5_error_code
escape_value(krb5_context context, const char *unquoted, char **quoted)
{
size_t i, len;
for (i = 0, len = 0; unquoted[i] != '\0'; i++, len++) {
if (need_quote((unsigned char)unquoted[i]))
len += 2;
}
*quoted = malloc(len + 1);
if (*quoted == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
for (i = 0; unquoted[0] ; unquoted++) {
if (need_quote((unsigned char)unquoted[0])) {
(*quoted)[i++] = '\\';
(*quoted)[i++] = hexchar[(unquoted[0] >> 4) & 0xf];
(*quoted)[i++] = hexchar[(unquoted[0] ) & 0xf];
} else
(*quoted)[i++] = (char)unquoted[0];
}
(*quoted)[i] = '\0';
return 0;
}
static krb5_error_code
LDAP__lookup_princ(krb5_context context,
HDB *db,
const char *princname,
const char *userid,
LDAPMessage **msg)
{
krb5_error_code ret;
int rc;
char *quote, *filter = NULL;
ret = LDAP__connect(context, db);
if (ret)
return ret;
/*
* Quote searches that contain filter language, this quote
* searches for *@REALM, which takes very long time.
*/
ret = escape_value(context, princname, &quote);
if (ret)
goto out;
rc = asprintf(&filter,
"(&(objectClass=krb5Principal)(krb5PrincipalName=%s))",
quote);
free(quote);
if (rc < 0) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ret = LDAP_no_size_limit(context, HDB2LDAP(db));
if (ret)
goto out;
rc = ldap_search_ext_s(HDB2LDAP(db), HDB2BASE(db),
LDAP_SCOPE_SUBTREE, filter,
krb5kdcentry_attrs, 0,
NULL, NULL, NULL,
0, msg);
if (check_ldap(context, db, rc)) {
ret = HDB_ERR_NOENTRY;
krb5_set_error_message(context, ret, "ldap_search_ext_s: "
"filter: %s - error: %s",
filter, ldap_err2string(rc));
goto out;
}
if (userid && ldap_count_entries(HDB2LDAP(db), *msg) == 0) {
free(filter);
filter = NULL;
ldap_msgfree(*msg);
*msg = NULL;
ret = escape_value(context, userid, &quote);
if (ret)
goto out;
rc = asprintf(&filter,
"(&(|(objectClass=sambaSamAccount)(objectClass=%s))(uid=%s))",
structural_object, quote);
free(quote);
if (rc < 0) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "asprintf: out of memory");
goto out;
}
ret = LDAP_no_size_limit(context, HDB2LDAP(db));
if (ret)
goto out;
rc = ldap_search_ext_s(HDB2LDAP(db), HDB2BASE(db), LDAP_SCOPE_SUBTREE,
filter, krb5kdcentry_attrs, 0,
NULL, NULL, NULL,
0, msg);
if (check_ldap(context, db, rc)) {
ret = HDB_ERR_NOENTRY;
krb5_set_error_message(context, ret,
"ldap_search_ext_s: filter: %s error: %s",
filter, ldap_err2string(rc));
goto out;
}
}
ret = 0;
out:
if (filter)
free(filter);
return ret;
}
static krb5_error_code
LDAP_principal2message(krb5_context context, HDB * db,
krb5_const_principal princ, LDAPMessage ** msg)
{
char *name, *name_short = NULL;
krb5_error_code ret;
krb5_realm *r, *r0;
*msg = NULL;
ret = krb5_unparse_name(context, princ, &name);
if (ret)
return ret;
ret = krb5_get_default_realms(context, &r0);
if(ret) {
free(name);
return ret;
}
for (r = r0; *r != NULL; r++) {
if(strcmp(krb5_principal_get_realm(context, princ), *r) == 0) {
ret = krb5_unparse_name_short(context, princ, &name_short);
if (ret) {
krb5_free_host_realm(context, r0);
free(name);
return ret;
}
break;
}
}
krb5_free_host_realm(context, r0);
ret = LDAP__lookup_princ(context, db, name, name_short, msg);
free(name);
free(name_short);
return ret;
}
/*
* Construct an hdb_entry from a directory entry.
*/
static krb5_error_code
LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
int flags, hdb_entry * ent)
{
char *unparsed_name = NULL, *dn = NULL, *ntPasswordIN = NULL;
char *samba_acct_flags = NULL;
struct berval **keys;
struct berval **extensions;
struct berval **vals;
int tmp, tmp_time, i, ret, have_arcfour = 0;
memset(ent, 0, sizeof(*ent));
ent->flags = int2HDBFlags(0);
ret = LDAP_get_string_value(db, msg, "krb5PrincipalName", &unparsed_name);
if (ret == 0) {
ret = krb5_parse_name(context, unparsed_name, &ent->principal);
if (ret)
goto out;
} else {
ret = LDAP_get_string_value(db, msg, "uid",
&unparsed_name);
if (ret == 0) {
ret = krb5_parse_name(context, unparsed_name, &ent->principal);
if (ret)
goto out;
} else {
krb5_set_error_message(context, HDB_ERR_NOENTRY,
"hdb-ldap: ldap entry missing"
"principal name");
return HDB_ERR_NOENTRY;
}
}
{
int integer;
ret = LDAP_get_integer_value(db, msg, "krb5KeyVersionNumber",
&integer);
if (ret)
ent->kvno = 0;
else
ent->kvno = integer;
}
keys = ldap_get_values_len(HDB2LDAP(db), msg, "krb5Key");
if (keys != NULL) {
size_t l;
ent->keys.len = ldap_count_values_len(keys);
ent->keys.val = (Key *) calloc(ent->keys.len, sizeof(Key));
if (ent->keys.val == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "calloc: out of memory");
goto out;
}
for (i = 0; i < ent->keys.len; i++) {
decode_Key((unsigned char *) keys[i]->bv_val,
(size_t) keys[i]->bv_len, &ent->keys.val[i], &l);
}
ber_bvecfree(keys);
} else {
#if 1
/*
* This violates the ASN1 but it allows a principal to
* be related to a general directory entry without creating
* the keys. Hopefully it's OK.
*/
ent->keys.len = 0;
ent->keys.val = NULL;
#else
ret = HDB_ERR_NOENTRY;
goto out;
#endif
}
extensions = ldap_get_values_len(HDB2LDAP(db), msg, "krb5ExtendedAttributes");
if (extensions != NULL) {
size_t l;
ent->extensions = calloc(1, sizeof(*(ent->extensions)));
if (ent->extensions == NULL) {
ret = krb5_enomem(context);
goto out;
}
ent->extensions->len = ldap_count_values_len(extensions);
ent->extensions->val = (HDB_extension *) calloc(ent->extensions->len, sizeof(HDB_extension));
if (ent->extensions->val == NULL) {
ent->extensions->len = 0;
ret = krb5_enomem(context);
goto out;
}
for (i = 0; i < ent->extensions->len; i++) {
ret = decode_HDB_extension((unsigned char *) extensions[i]->bv_val,
(size_t) extensions[i]->bv_len, &ent->extensions->val[i], &l);
if (ret)
krb5_set_error_message(context, ret, "decode_HDB_extension failed");
}
ber_bvecfree(extensions);
} else {
ent->extensions = NULL;
}
vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5EncryptionType");
if (vals != NULL) {
ent->etypes = malloc(sizeof(*(ent->etypes)));
if (ent->etypes == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret,"malloc: out of memory");
goto out;
}
ent->etypes->len = ldap_count_values_len(vals);
ent->etypes->val = calloc(ent->etypes->len,
sizeof(ent->etypes->val[0]));
if (ent->etypes->val == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
ent->etypes->len = 0;
goto out;
}
for (i = 0; i < ent->etypes->len; i++) {
char *buf;
buf = malloc(vals[i]->bv_len + 1);
if (buf == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
memcpy(buf, vals[i]->bv_val, vals[i]->bv_len);
buf[vals[i]->bv_len] = '\0';
ent->etypes->val[i] = atoi(buf);
free(buf);
}
ldap_value_free_len(vals);
}
for (i = 0; i < ent->keys.len; i++) {
if (ent->keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5) {
have_arcfour = 1;
break;
}
}
/* manually construct the NT (type 23) key */
ret = LDAP_get_string_value(db, msg, "sambaNTPassword", &ntPasswordIN);
if (ret == 0 && have_arcfour == 0) {
unsigned *etypes;
Key *ks;
ks = realloc(ent->keys.val,
(ent->keys.len + 1) *
sizeof(ent->keys.val[0]));
if (ks == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ent->keys.val = ks;
memset(&ent->keys.val[ent->keys.len], 0, sizeof(Key));
ent->keys.val[ent->keys.len].key.keytype = ETYPE_ARCFOUR_HMAC_MD5;
ret = krb5_data_alloc (&ent->keys.val[ent->keys.len].key.keyvalue, 16);
if (ret) {
krb5_set_error_message(context, ret, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
ret = hex_decode(ntPasswordIN,
ent->keys.val[ent->keys.len].key.keyvalue.data, 16);
ent->keys.len++;
if (ret == -1) {
krb5_set_error_message(context, ret = EINVAL,
"invalid hex encoding of password");
goto out;
}
if (ent->etypes == NULL) {
ent->etypes = malloc(sizeof(*(ent->etypes)));
if (ent->etypes == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ent->etypes->val = NULL;
ent->etypes->len = 0;
}
for (i = 0; i < ent->etypes->len; i++)
if (ent->etypes->val[i] == ETYPE_ARCFOUR_HMAC_MD5)
break;
/* If there is no ARCFOUR enctype, add one */
if (i == ent->etypes->len) {
etypes = realloc(ent->etypes->val,
(ent->etypes->len + 1) *
sizeof(ent->etypes->val[0]));
if (etypes == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ent->etypes->val = etypes;
ent->etypes->val[ent->etypes->len] =
ETYPE_ARCFOUR_HMAC_MD5;
ent->etypes->len++;
}
}
ret = LDAP_get_generalized_time_value(db, msg, "createTimestamp",
&ent->created_by.time);
if (ret)
ent->created_by.time = time(NULL);
ent->created_by.principal = NULL;
if (flags & HDB_F_ADMIN_DATA) {
ret = LDAP_get_string_value(db, msg, "creatorsName", &dn);
if (ret == 0) {
LDAP_dn2principal(context, db, dn, &ent->created_by.principal);
free(dn);
}
ent->modified_by = calloc(1, sizeof(*ent->modified_by));
if (ent->modified_by == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ret = LDAP_get_generalized_time_value(db, msg, "modifyTimestamp",
&ent->modified_by->time);
if (ret == 0) {
ret = LDAP_get_string_value(db, msg, "modifiersName", &dn);
if (ret == 0) {
LDAP_dn2principal(context, db, dn, &ent->modified_by->principal);
free(dn);
} else {
free(ent->modified_by);
ent->modified_by = NULL;
}
}
}
ent->valid_start = malloc(sizeof(*ent->valid_start));
if (ent->valid_start == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ret = LDAP_get_generalized_time_value(db, msg, "krb5ValidStart",
ent->valid_start);
if (ret) {
/* OPTIONAL */
free(ent->valid_start);
ent->valid_start = NULL;
}
ent->valid_end = malloc(sizeof(*ent->valid_end));
if (ent->valid_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ret = LDAP_get_generalized_time_value(db, msg, "krb5ValidEnd",
ent->valid_end);
if (ret) {
/* OPTIONAL */
free(ent->valid_end);
ent->valid_end = NULL;
}
ret = LDAP_get_integer_value(db, msg, "sambaKickoffTime", &tmp_time);
if (ret == 0) {
if (ent->valid_end == NULL) {
ent->valid_end = malloc(sizeof(*ent->valid_end));
if (ent->valid_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
}
*ent->valid_end = tmp_time;
}
ent->pw_end = malloc(sizeof(*ent->pw_end));
if (ent->pw_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ret = LDAP_get_generalized_time_value(db, msg, "krb5PasswordEnd",
ent->pw_end);
if (ret) {
/* OPTIONAL */
free(ent->pw_end);
ent->pw_end = NULL;
}
ret = LDAP_get_integer_value(db, msg, "sambaPwdLastSet", &tmp_time);
if (ret == 0) {
time_t delta;
delta = krb5_config_get_time_default(context, NULL,
0,
"kadmin",
"password_lifetime",
NULL);
if (delta) {
if (ent->pw_end == NULL) {
ent->pw_end = malloc(sizeof(*ent->pw_end));
if (ent->pw_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
}
*ent->pw_end = tmp_time + delta;
}
}
ret = LDAP_get_integer_value(db, msg, "sambaPwdMustChange", &tmp_time);
if (ret == 0) {
if (ent->pw_end == NULL) {
ent->pw_end = malloc(sizeof(*ent->pw_end));
if (ent->pw_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
}
*ent->pw_end = tmp_time;
}
/* OPTIONAL */
ret = LDAP_get_integer_value(db, msg, "sambaPwdLastSet", &tmp_time);
if (ret == 0)
hdb_entry_set_pw_change_time(context, ent, tmp_time);
{
int max_life;
ent->max_life = malloc(sizeof(*ent->max_life));
if (ent->max_life == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ret = LDAP_get_integer_value(db, msg, "krb5MaxLife", &max_life);
if (ret) {
free(ent->max_life);
ent->max_life = NULL;
} else
*ent->max_life = max_life;
}
{
int max_renew;
ent->max_renew = malloc(sizeof(*ent->max_renew));
if (ent->max_renew == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
ret = LDAP_get_integer_value(db, msg, "krb5MaxRenew", &max_renew);
if (ret) {
free(ent->max_renew);
ent->max_renew = NULL;
} else
*ent->max_renew = max_renew;
}
ret = LDAP_get_integer_value(db, msg, "krb5KDCFlags", &tmp);
if (ret)
tmp = 0;
ent->flags = int2HDBFlags(tmp);
/* Try and find Samba flags to put into the mix */
ret = LDAP_get_string_value(db, msg, "sambaAcctFlags", &samba_acct_flags);
if (ret == 0) {
/* parse the [UXW...] string:
'N' No password
'D' Disabled
'H' Homedir required
'T' Temp account.
'U' User account (normal)
'M' MNS logon user account - what is this ?
'W' Workstation account
'S' Server account
'L' Locked account
'X' No Xpiry on password
'I' Interdomain trust account
*/
int flags_len = strlen(samba_acct_flags);
if (flags_len < 2)
goto out2;
if (samba_acct_flags[0] != '['
|| samba_acct_flags[flags_len - 1] != ']')
goto out2;
/* Allow forwarding */
if (samba_forwardable)
ent->flags.forwardable = TRUE;
for (i=0; i < flags_len; i++) {
switch (samba_acct_flags[i]) {
case ' ':
case '[':
case ']':
break;
case 'N':
/* how to handle no password in kerberos? */
break;
case 'D':
ent->flags.invalid = TRUE;
break;
case 'H':
break;
case 'T':
/* temp duplicate */
ent->flags.invalid = TRUE;
break;
case 'U':
ent->flags.client = TRUE;
break;
case 'M':
break;
case 'W':
case 'S':
ent->flags.server = TRUE;
ent->flags.client = TRUE;
break;
case 'L':
ent->flags.invalid = TRUE;
break;
case 'X':
if (ent->pw_end) {
free(ent->pw_end);
ent->pw_end = NULL;
}
break;
case 'I':
ent->flags.server = TRUE;
ent->flags.client = TRUE;
break;
}
}
out2:
free(samba_acct_flags);
}
ret = 0;
out:
free(unparsed_name);
free(ntPasswordIN);
if (ret)
hdb_free_entry(context, db, ent);
return ret;
}
static krb5_error_code
LDAP_close(krb5_context context, HDB * db)
{
if (HDB2LDAP(db)) {
ldap_unbind_ext(HDB2LDAP(db), NULL, NULL);
((struct hdbldapdb *)db->hdb_db)->h_lp = NULL;
}
return 0;
}
static krb5_error_code
LDAP_lock(krb5_context context, HDB * db, int operation)
{
return 0;
}
static krb5_error_code
LDAP_unlock(krb5_context context, HDB * db)
{
return 0;
}
static krb5_error_code
LDAP_seq(krb5_context context, HDB * db, unsigned flags, hdb_entry * entry)
{
int msgid, rc, parserc;
krb5_error_code ret;
LDAPMessage *e;
msgid = HDB2MSGID(db);
if (msgid < 0)
return HDB_ERR_NOENTRY;
do {
rc = ldap_result(HDB2LDAP(db), msgid, LDAP_MSG_ONE, NULL, &e);
switch (rc) {
case LDAP_RES_SEARCH_REFERENCE:
ldap_msgfree(e);
ret = 0;
break;
case LDAP_RES_SEARCH_ENTRY:
/* We have an entry. Parse it. */
ret = LDAP_message2entry(context, db, e, flags, entry);
ldap_msgfree(e);
break;
case LDAP_RES_SEARCH_RESULT:
/* We're probably at the end of the results. If not, abandon. */
parserc =
ldap_parse_result(HDB2LDAP(db), e, NULL, NULL, NULL,
NULL, NULL, 1);
ret = HDB_ERR_NOENTRY;
if (parserc != LDAP_SUCCESS
&& parserc != LDAP_MORE_RESULTS_TO_RETURN) {
krb5_set_error_message(context, ret, "ldap_parse_result: %s",
ldap_err2string(parserc));
ldap_abandon_ext(HDB2LDAP(db), msgid, NULL, NULL);
}
HDBSETMSGID(db, -1);
break;
case LDAP_SERVER_DOWN:
ldap_msgfree(e);
LDAP_close(context, db);
HDBSETMSGID(db, -1);
ret = ENETDOWN;
break;
default:
/* Some unspecified error (timeout?). Abandon. */
ldap_msgfree(e);
ldap_abandon_ext(HDB2LDAP(db), msgid, NULL, NULL);
ret = HDB_ERR_NOENTRY;
HDBSETMSGID(db, -1);
break;
}
} while (rc == LDAP_RES_SEARCH_REFERENCE);
if (ret == 0) {
if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
ret = hdb_unseal_keys(context, db, entry);
if (ret)
hdb_free_entry(context, db, entry);
}
}
return ret;
}
static krb5_error_code
LDAP_firstkey(krb5_context context, HDB *db, unsigned flags,
hdb_entry *entry)
{
krb5_error_code ret;
int msgid;
ret = LDAP__connect(context, db);
if (ret)
return ret;
ret = LDAP_no_size_limit(context, HDB2LDAP(db));
if (ret)
return ret;
ret = ldap_search_ext(HDB2LDAP(db), HDB2BASE(db),
LDAP_SCOPE_SUBTREE,
"(|(objectClass=krb5Principal)(objectClass=sambaSamAccount))",
krb5kdcentry_attrs, 0,
NULL, NULL, NULL, 0, &msgid);
if (ret != LDAP_SUCCESS || msgid < 0)
return HDB_ERR_NOENTRY;
HDBSETMSGID(db, msgid);
return LDAP_seq(context, db, flags, entry);
}
static krb5_error_code
LDAP_nextkey(krb5_context context, HDB * db, unsigned flags,
hdb_entry * entry)
{
return LDAP_seq(context, db, flags, entry);
}
static krb5_error_code
LDAP__connect(krb5_context context, HDB * db)
{
int rc, version = LDAP_VERSION3;
/*
* Empty credentials to do a SASL bind with LDAP. Note that empty
* different from NULL credentials. If you provide NULL
* credentials instead of empty credentials you will get a SASL
* bind in progress message.
*/
struct berval bv = { 0, "" };
const char *sasl_method = "EXTERNAL";
const char *bind_dn = NULL;
if (HDB2BINDDN(db) != NULL && HDB2BINDPW(db) != NULL) {
/* A bind DN was specified; use SASL SIMPLE */
bind_dn = HDB2BINDDN(db);
sasl_method = LDAP_SASL_SIMPLE;
bv.bv_val = HDB2BINDPW(db);
bv.bv_len = strlen(bv.bv_val);
}
if (HDB2LDAP(db)) {
/* connection has been opened. ping server. */
struct sockaddr_un addr;
socklen_t len = sizeof(addr);
int sd;
if (ldap_get_option(HDB2LDAP(db), LDAP_OPT_DESC, &sd) == 0 &&
getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
/* the other end has died. reopen. */
LDAP_close(context, db);
}
}
if (HDB2LDAP(db) != NULL) /* server is UP */
return 0;
rc = ldap_initialize(&((struct hdbldapdb *)db->hdb_db)->h_lp, HDB2URL(db));
if (rc != LDAP_SUCCESS) {
krb5_set_error_message(context, HDB_ERR_NOENTRY, "ldap_initialize: %s",
ldap_err2string(rc));
return HDB_ERR_NOENTRY;
}
rc = ldap_set_option(HDB2LDAP(db), LDAP_OPT_PROTOCOL_VERSION,
(const void *)&version);
if (rc != LDAP_SUCCESS) {
krb5_set_error_message(context, HDB_ERR_BADVERSION,
"ldap_set_option: %s", ldap_err2string(rc));
LDAP_close(context, db);
return HDB_ERR_BADVERSION;
}
if (((struct hdbldapdb *)db->hdb_db)->h_start_tls) {
rc = ldap_start_tls_s(HDB2LDAP(db), NULL, NULL);
if (rc != LDAP_SUCCESS) {
krb5_set_error_message(context, HDB_ERR_BADVERSION,
"ldap_start_tls_s: %s", ldap_err2string(rc));
LDAP_close(context, db);
return HDB_ERR_BADVERSION;
}
}
rc = ldap_sasl_bind_s(HDB2LDAP(db), bind_dn, sasl_method, &bv,
NULL, NULL, NULL);
if (rc != LDAP_SUCCESS) {
krb5_set_error_message(context, HDB_ERR_BADVERSION,
"ldap_sasl_bind_s: %s", ldap_err2string(rc));
LDAP_close(context, db);
return HDB_ERR_BADVERSION;
}
return 0;
}
static krb5_error_code
LDAP_open(krb5_context context, HDB * db, int flags, mode_t mode)
{
/* Not the right place for this. */
#ifdef HAVE_SIGACTION
struct sigaction sa;
sa.sa_flags = 0;
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sigaction(SIGPIPE, &sa, NULL);
#else
signal(SIGPIPE, SIG_IGN);
#endif /* HAVE_SIGACTION */
return LDAP__connect(context, db);
}
static krb5_error_code
LDAP_fetch_kvno(krb5_context context, HDB * db, krb5_const_principal principal,
unsigned flags, krb5_kvno kvno, hdb_entry * entry)
{
LDAPMessage *msg, *e;
krb5_error_code ret;
ret = LDAP_principal2message(context, db, principal, &msg);
if (ret)
return ret;
e = ldap_first_entry(HDB2LDAP(db), msg);
if (e == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
ret = LDAP_message2entry(context, db, e, flags, entry);
if (ret == 0) {
if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
ret = hdb_unseal_keys(context, db, entry);
if (ret)
hdb_free_entry(context, db, entry);
}
}
out:
ldap_msgfree(msg);
return ret;
}
#if 0
static krb5_error_code
LDAP_fetch(krb5_context context, HDB * db, krb5_const_principal principal,
unsigned flags, hdb_entry * entry)
{
return LDAP_fetch_kvno(context, db, principal,
flags & (~HDB_F_KVNO_SPECIFIED), 0, entry);
}
#endif
static krb5_error_code
LDAP_store(krb5_context context, HDB * db, unsigned flags,
hdb_entry * entry)
{
LDAPMod **mods = NULL;
krb5_error_code ret;
const char *errfn;
int rc;
LDAPMessage *msg = NULL, *e = NULL;
char *dn = NULL, *name = NULL;
krb5_boolean is_new_entry;
if ((flags & HDB_F_PRECHECK))
return 0; /* we can't guarantee whether we'll be able to perform it */
ret = LDAP_principal2message(context, db, entry->principal, &msg);
if (ret == 0)
e = ldap_first_entry(HDB2LDAP(db), msg);
ret = krb5_unparse_name(context, entry->principal, &name);
if (ret) {
free(name);
return ret;
}
ret = hdb_seal_keys(context, db, entry);
if (ret)
goto out;
/* turn new entry into LDAPMod array */
ret = LDAP_entry2mods(context, db, entry, e, &mods, &is_new_entry);
if (ret)
goto out;
if (e == NULL) {
ret = asprintf(&dn, "krb5PrincipalName=%s,%s", name, HDB2CREATE(db));
if (ret < 0) {
ret = ENOMEM;
krb5_set_error_message(context, ret, "asprintf: out of memory");
goto out;
}
} else if ((flags & HDB_F_REPLACE) || (is_new_entry)) {
/* Entry exists, and we're allowed to replace it. */
/* Entry may also exist but need to be modified to create a new principal. */
dn = ldap_get_dn(HDB2LDAP(db), e);
} else {
/* Entry exists, but we're not allowed to replace it. Bail. */
ret = HDB_ERR_EXISTS;
goto out;
}
/* write entry into directory */
if (e == NULL) {
/* didn't exist before */
rc = ldap_add_ext_s(HDB2LDAP(db), dn, mods, NULL, NULL );
errfn = "ldap_add_ext_s";
} else {
/* already existed, send deltas only */
rc = ldap_modify_ext_s(HDB2LDAP(db), dn, mods, NULL, NULL );
errfn = "ldap_modify_ext_s";
}
if (check_ldap(context, db, rc)) {
char *ld_error = NULL;
ldap_get_option(HDB2LDAP(db), LDAP_OPT_ERROR_STRING,
&ld_error);
ret = HDB_ERR_CANT_LOCK_DB;
krb5_set_error_message(context, ret, "%s: %s (DN=%s) %s: %s",
errfn, name, dn, ldap_err2string(rc), ld_error);
} else
ret = 0;
out:
/* free stuff */
if (dn)
free(dn);
if (msg)
ldap_msgfree(msg);
if (mods)
ldap_mods_free(mods, 1);
if (name)
free(name);
return ret;
}
static krb5_error_code
LDAP_remove(krb5_context context, HDB *db,
unsigned flags, krb5_const_principal principal)
{
krb5_error_code ret;
LDAPMessage *msg, *e;
char *dn = NULL;
int rc, limit = LDAP_NO_LIMIT;
if ((flags & HDB_F_PRECHECK))
return 0; /* we can't guarantee whether we'll be able to perform it */
ret = LDAP_principal2message(context, db, principal, &msg);
if (ret)
goto out;
e = ldap_first_entry(HDB2LDAP(db), msg);
if (e == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
dn = ldap_get_dn(HDB2LDAP(db), e);
if (dn == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
rc = ldap_set_option(HDB2LDAP(db), LDAP_OPT_SIZELIMIT, (const void *)&limit);
if (rc != LDAP_SUCCESS) {
ret = HDB_ERR_BADVERSION;
krb5_set_error_message(context, ret, "ldap_set_option: %s",
ldap_err2string(rc));
goto out;
}
/* HACK: This should check if we need to delete the object or just some attributes */
rc = ldap_delete_ext_s(HDB2LDAP(db), dn, NULL, NULL );
if (check_ldap(context, db, rc)) {
ret = HDB_ERR_CANT_LOCK_DB;
krb5_set_error_message(context, ret, "ldap_delete_ext_s: %s",
ldap_err2string(rc));
} else
ret = 0;
out:
if (dn != NULL)
free(dn);
if (msg != NULL)
ldap_msgfree(msg);
return ret;
}
static krb5_error_code
LDAP_destroy(krb5_context context, HDB * db)
{
krb5_error_code ret;
LDAP_close(context, db);
ret = hdb_clear_master_key(context, db);
if (HDB2BASE(db))
free(HDB2BASE(db));
if (HDB2CREATE(db))
free(HDB2CREATE(db));
if (HDB2URL(db))
free(HDB2URL(db));
krb5_config_free_strings(db->virtual_hostbased_princ_svcs);
if (db->hdb_name)
free(db->hdb_name);
free(db->hdb_db);
free(db);
return ret;
}
static krb5_error_code
LDAP_set_sync(krb5_context context, HDB * db, int on)
{
(void)on;
return 0;
}
static krb5_error_code
hdb_ldap_common(krb5_context context,
HDB ** db,
const char *search_base,
const char *url)
{
struct hdbldapdb *h;
const char *create_base = NULL;
const char *ldap_secret_file = NULL;
if (url == NULL || url[0] == '\0') {
const char *p;
p = krb5_config_get_string(context, NULL, "kdc",
"hdb-ldap-url", NULL);
if (p == NULL)
p = default_ldap_url;
url = p;
}
if (search_base == NULL || search_base[0] == '\0') {
krb5_set_error_message(context, ENOMEM, "ldap search base not configured");
return ENOMEM; /* XXX */
}
if (structural_object == NULL) {
const char *p;
p = krb5_config_get_string(context, NULL, "kdc",
"hdb-ldap-structural-object", NULL);
if (p == NULL)
p = default_structural_object;
structural_object = strdup(p);
if (structural_object == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
}
samba_forwardable =
krb5_config_get_bool_default(context, NULL, TRUE,
"kdc", "hdb-samba-forwardable", NULL);
*db = calloc(1, sizeof(**db));
if (*db == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
memset(*db, 0, sizeof(**db));
h = calloc(1, sizeof(*h));
if (h == NULL) {
free(*db);
*db = NULL;
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
(*db)->hdb_db = h;
/* XXX */
if (asprintf(&(*db)->hdb_name, "ldap:%s", search_base) == -1) {
LDAP_destroy(context, *db);
*db = NULL;
krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
return ENOMEM;
}
h->h_url = strdup(url);
h->h_base = strdup(search_base);
if (h->h_url == NULL || h->h_base == NULL) {
LDAP_destroy(context, *db);
*db = NULL;
krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
return ENOMEM;
}
ldap_secret_file = krb5_config_get_string(context, NULL, "kdc",
"hdb-ldap-secret-file", NULL);
if (ldap_secret_file != NULL) {
krb5_config_binding *tmp;
krb5_error_code ret;
const char *p;
ret = krb5_config_parse_file(context, ldap_secret_file, &tmp);
if (ret)
return ret;
p = krb5_config_get_string(context, tmp, "kdc",
"hdb-ldap-bind-dn", NULL);
if (p != NULL)
h->h_bind_dn = strdup(p);
p = krb5_config_get_string(context, tmp, "kdc",
"hdb-ldap-bind-password", NULL);
if (p != NULL)
h->h_bind_password = strdup(p);
krb5_config_file_free(context, tmp);
}
h->h_start_tls =
krb5_config_get_bool_default(context, NULL, FALSE,
"kdc", "hdb-ldap-start-tls", NULL);
create_base = krb5_config_get_string(context, NULL, "kdc",
"hdb-ldap-create-base", NULL);
if (create_base == NULL)
create_base = h->h_base;
h->h_createbase = strdup(create_base);
if (h->h_createbase == NULL) {
LDAP_destroy(context, *db);
*db = NULL;
krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
return ENOMEM;
}
(*db)->hdb_master_key_set = 0;
(*db)->hdb_openp = 0;
(*db)->hdb_capability_flags = HDB_CAP_F_SHARED_DIRECTORY;
(*db)->hdb_open = LDAP_open;
(*db)->hdb_close = LDAP_close;
(*db)->hdb_fetch_kvno = LDAP_fetch_kvno;
(*db)->hdb_store = LDAP_store;
(*db)->hdb_remove = LDAP_remove;
(*db)->hdb_firstkey = LDAP_firstkey;
(*db)->hdb_nextkey = LDAP_nextkey;
(*db)->hdb_lock = LDAP_lock;
(*db)->hdb_unlock = LDAP_unlock;
(*db)->hdb_rename = NULL;
(*db)->hdb__get = NULL;
(*db)->hdb__put = NULL;
(*db)->hdb__del = NULL;
(*db)->hdb_destroy = LDAP_destroy;
(*db)->hdb_set_sync = LDAP_set_sync;
return 0;
}
#ifdef OPENLDAP_MODULE
static
#endif
krb5_error_code
hdb_ldap_create(krb5_context context, HDB ** db, const char *arg)
{
return hdb_ldap_common(context, db, arg, NULL);
}
#ifdef OPENLDAP_MODULE
static
#endif
krb5_error_code
hdb_ldapi_create(krb5_context context, HDB ** db, const char *arg)
{
krb5_error_code ret;
char *search_base, *p;
if (asprintf(&p, "ldapi:%s", arg) == -1 || p == NULL) {
*db = NULL;
krb5_set_error_message(context, ENOMEM, "out of memory");
return ENOMEM;
}
search_base = strchr(p + strlen("ldapi://"), ':');
if (search_base == NULL) {
*db = NULL;
krb5_set_error_message(context, HDB_ERR_BADVERSION,
"search base missing");
return HDB_ERR_BADVERSION;
}
*search_base = '\0';
search_base++;
ret = hdb_ldap_common(context, db, search_base, p);
free(p);
return ret;
}
#ifdef OPENLDAP_MODULE
static krb5_error_code
init(krb5_context context, void **ctx)
{
*ctx = NULL;
return 0;
}
static void
fini(void *ctx)
{
}
struct hdb_method hdb_ldap_interface = {
HDB_INTERFACE_VERSION,
init,
fini,
0 /*is_file_based*/, 0 /*can_taste*/,
"ldap",
hdb_ldap_create
};
struct hdb_method hdb_ldapi_interface = {
HDB_INTERFACE_VERSION,
init,
fini,
0 /*is_file_based*/, 0 /*can_taste*/,
"ldapi",
hdb_ldapi_create
};
#endif
#endif /* OPENLDAP */
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