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freebsd-dev/crypto/heimdal/lib/hdb/hdb-ldap.c

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/*
* Copyright (c) 1999-2001, PADL Software Pty Ltd.
* 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"
RCSID("$Id: hdb-ldap.c,v 1.10 2002/09/04 18:42:22 joda Exp $");
#ifdef OPENLDAP
#include <lber.h>
#include <ldap.h>
#include <ctype.h>
#include <sys/un.h>
static krb5_error_code LDAP__connect(krb5_context context, HDB * db);
static krb5_error_code
LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
hdb_entry * ent);
static char *krb5kdcentry_attrs[] =
{ "krb5PrincipalName", "cn", "krb5PrincipalRealm",
"krb5KeyVersionNumber", "krb5Key",
"krb5ValidStart", "krb5ValidEnd", "krb5PasswordEnd",
"krb5MaxLife", "krb5MaxRenew", "krb5KDCFlags", "krb5EncryptionType",
"modifiersName", "modifyTimestamp", "creatorsName", "createTimestamp",
NULL
};
static char *krb5principal_attrs[] =
{ "krb5PrincipalName", "cn", "krb5PrincipalRealm",
"modifiersName", "modifyTimestamp", "creatorsName", "createTimestamp",
NULL
};
/* based on samba: source/passdb/ldap.c */
static krb5_error_code
LDAP_addmod_len(LDAPMod *** modlist, int modop, const char *attribute,
unsigned char *value, size_t len)
{
LDAPMod **mods = *modlist;
int i, j;
if (mods == NULL) {
mods = (LDAPMod **) calloc(1, sizeof(LDAPMod *));
if (mods == NULL) {
return ENOMEM;
}
mods[0] = NULL;
}
for (i = 0; mods[i] != NULL; ++i) {
if ((mods[i]->mod_op & (~LDAP_MOD_BVALUES)) == modop
&& (!strcasecmp(mods[i]->mod_type, attribute))) {
break;
}
}
if (mods[i] == NULL) {
mods = (LDAPMod **) realloc(mods, (i + 2) * sizeof(LDAPMod *));
if (mods == NULL) {
return ENOMEM;
}
mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod));
if (mods[i] == NULL) {
return ENOMEM;
}
mods[i]->mod_op = modop | LDAP_MOD_BVALUES;
mods[i]->mod_bvalues = NULL;
mods[i]->mod_type = strdup(attribute);
if (mods[i]->mod_type == NULL) {
return ENOMEM;
}
mods[i + 1] = NULL;
}
if (value != NULL) {
j = 0;
if (mods[i]->mod_bvalues != NULL) {
for (; mods[i]->mod_bvalues[j] != NULL; j++);
}
mods[i]->mod_bvalues =
(struct berval **) realloc(mods[i]->mod_bvalues,
(j + 2) * sizeof(struct berval *));
if (mods[i]->mod_bvalues == NULL) {
return ENOMEM;
}
/* Caller allocates memory on our behalf, unlike LDAP_addmod. */
mods[i]->mod_bvalues[j] =
(struct berval *) malloc(sizeof(struct berval));
if (mods[i]->mod_bvalues[j] == NULL) {
return ENOMEM;
}
mods[i]->mod_bvalues[j]->bv_val = value;
mods[i]->mod_bvalues[j]->bv_len = len;
mods[i]->mod_bvalues[j + 1] = NULL;
}
*modlist = mods;
return 0;
}
static krb5_error_code
LDAP_addmod(LDAPMod *** modlist, int modop, const char *attribute,
const char *value)
{
LDAPMod **mods = *modlist;
int i, j;
if (mods == NULL) {
mods = (LDAPMod **) calloc(1, sizeof(LDAPMod *));
if (mods == NULL) {
return ENOMEM;
}
mods[0] = NULL;
}
for (i = 0; mods[i] != NULL; ++i) {
if (mods[i]->mod_op == modop
&& (!strcasecmp(mods[i]->mod_type, attribute))) {
break;
}
}
if (mods[i] == NULL) {
mods = (LDAPMod **) realloc(mods, (i + 2) * sizeof(LDAPMod *));
if (mods == NULL) {
return ENOMEM;
}
mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod));
if (mods[i] == NULL) {
return ENOMEM;
}
mods[i]->mod_op = modop;
mods[i]->mod_values = NULL;
mods[i]->mod_type = strdup(attribute);
if (mods[i]->mod_type == NULL) {
return ENOMEM;
}
mods[i + 1] = NULL;
}
if (value != NULL) {
j = 0;
if (mods[i]->mod_values != NULL) {
for (; mods[i]->mod_values[j] != NULL; j++);
}
mods[i]->mod_values = (char **) realloc(mods[i]->mod_values,
(j + 2) * sizeof(char *));
if (mods[i]->mod_values == NULL) {
return ENOMEM;
}
mods[i]->mod_values[j] = strdup(value);
if (mods[i]->mod_values[j] == NULL) {
return ENOMEM;
}
mods[i]->mod_values[j + 1] = NULL;
}
*modlist = mods;
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_get_string_value(HDB * db, LDAPMessage * entry,
const char *attribute, char **ptr)
{
char **vals;
int ret;
vals = ldap_get_values((LDAP *) db->db, entry, (char *) attribute);
if (vals == NULL) {
return HDB_ERR_NOENTRY;
}
*ptr = strdup(vals[0]);
if (*ptr == NULL) {
ret = ENOMEM;
} else {
ret = 0;
}
ldap_value_free(vals);
return ret;
}
static krb5_error_code
LDAP_get_integer_value(HDB * db, LDAPMessage * entry,
const char *attribute, int *ptr)
{
char **vals;
vals = ldap_get_values((LDAP *) db->db, entry, (char *) attribute);
if (vals == NULL) {
return HDB_ERR_NOENTRY;
}
*ptr = atoi(vals[0]);
ldap_value_free(vals);
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 != 0) {
return ret;
}
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 krb5_error_code
LDAP_entry2mods(krb5_context context, HDB * db, hdb_entry * ent,
LDAPMessage * msg, LDAPMod *** pmods)
{
krb5_error_code ret;
krb5_boolean is_new_entry;
int rc, i;
char *tmp = NULL;
LDAPMod **mods = NULL;
hdb_entry orig;
unsigned long oflags, nflags;
if (msg != NULL) {
ret = LDAP_message2entry(context, db, msg, &orig);
if (ret != 0) {
goto out;
}
is_new_entry = FALSE;
} else {
/* to make it perfectly obvious we're depending on
* orig being intiialized to zero */
memset(&orig, 0, sizeof(orig));
is_new_entry = TRUE;
}
if (is_new_entry) {
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "top");
if (ret != 0) {
goto out;
}
/* person is the structural object class */
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "person");
if (ret != 0) {
goto out;
}
ret =
LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass",
"krb5Principal");
if (ret != 0) {
goto out;
}
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass",
"krb5KDCEntry");
if (ret != 0) {
goto out;
}
}
if (is_new_entry ||
krb5_principal_compare(context, ent->principal, orig.principal) ==
FALSE) {
ret = krb5_unparse_name(context, ent->principal, &tmp);
if (ret != 0) {
goto out;
}
ret =
LDAP_addmod(&mods, LDAP_MOD_REPLACE, "krb5PrincipalName", tmp);
if (ret != 0) {
free(tmp);
goto out;
}
free(tmp);
}
if (ent->kvno != orig.kvno) {
rc = asprintf(&tmp, "%d", ent->kvno);
if (rc < 0) {
krb5_set_error_string(context, "asprintf: out of memory");
ret = ENOMEM;
goto out;
}
ret =
LDAP_addmod(&mods, LDAP_MOD_REPLACE, "krb5KeyVersionNumber",
tmp);
free(tmp);
if (ret != 0) {
goto out;
}
}
if (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 != 0) {
goto out;
}
}
}
if (ent->valid_end) {
if (orig.valid_end == NULL
|| (*(ent->valid_end) != *(orig.valid_end))) {
ret =
LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
"krb5ValidEnd",
ent->valid_end);
if (ret != 0) {
goto out;
}
}
}
if (ent->pw_end) {
if (orig.pw_end == NULL || (*(ent->pw_end) != *(orig.pw_end))) {
ret =
LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
"krb5PasswordEnd",
ent->pw_end);
if (ret != 0) {
goto out;
}
}
}
if (ent->max_life) {
if (orig.max_life == NULL
|| (*(ent->max_life) != *(orig.max_life))) {
rc = asprintf(&tmp, "%d", *(ent->max_life));
if (rc < 0) {
krb5_set_error_string(context, "asprintf: out of memory");
ret = ENOMEM;
goto out;
}
ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "krb5MaxLife", tmp);
free(tmp);
if (ret != 0) {
goto out;
}
}
}
if (ent->max_renew) {
if (orig.max_renew == NULL
|| (*(ent->max_renew) != *(orig.max_renew))) {
rc = asprintf(&tmp, "%d", *(ent->max_renew));
if (rc < 0) {
krb5_set_error_string(context, "asprintf: out of memory");
ret = ENOMEM;
goto out;
}
ret =
LDAP_addmod(&mods, LDAP_MOD_REPLACE, "krb5MaxRenew", tmp);
free(tmp);
if (ret != 0) {
goto out;
}
}
}
memset(&oflags, 0, sizeof(oflags));
memcpy(&oflags, &orig.flags, sizeof(HDBFlags));
memset(&nflags, 0, sizeof(nflags));
memcpy(&nflags, &ent->flags, sizeof(HDBFlags));
if (memcmp(&oflags, &nflags, sizeof(HDBFlags))) {
rc = asprintf(&tmp, "%lu", nflags);
if (rc < 0) {
krb5_set_error_string(context, "asprintf: out of memory");
ret = ENOMEM;
goto out;
}
ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "krb5KDCFlags", tmp);
free(tmp);
if (ret != 0) {
goto out;
}
}
if (is_new_entry == FALSE && orig.keys.len > 0) {
/* for the moment, clobber and replace keys. */
ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5Key", NULL);
if (ret != 0) {
goto out;
}
}
for (i = 0; i < ent->keys.len; i++) {
unsigned char *buf;
size_t len;
ASN1_MALLOC_ENCODE(Key, buf, len, &ent->keys.val[i], &len, ret);
if (ret != 0)
goto out;
/* addmod_len _owns_ the key, doesn't need to copy it */
ret = LDAP_addmod_len(&mods, LDAP_MOD_ADD, "krb5Key", buf, len);
if (ret != 0) {
goto out;
}
}
if (ent->etypes) {
/* clobber and replace encryption types. */
if (is_new_entry == FALSE) {
ret =
LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5EncryptionType",
NULL);
}
for (i = 0; i < ent->etypes->len; i++) {
rc = asprintf(&tmp, "%d", ent->etypes->val[i]);
if (rc < 0) {
krb5_set_error_string(context, "asprintf: out of memory");
ret = ENOMEM;
goto out;
}
free(tmp);
ret =
LDAP_addmod(&mods, LDAP_MOD_ADD, "krb5EncryptionType",
tmp);
if (ret != 0) {
goto out;
}
}
}
/* for clarity */
ret = 0;
out:
if (ret == 0) {
*pmods = mods;
} else if (mods != NULL) {
ldap_mods_free(mods, 1);
*pmods = NULL;
}
if (msg != NULL) {
hdb_free_entry(context, &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, limit = 1;
char **values;
LDAPMessage *res = NULL, *e;
rc = ldap_set_option((LDAP *) db->db, LDAP_OPT_SIZELIMIT, (const void *)&limit);
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_set_option: %s", ldap_err2string(rc));
ret = HDB_ERR_BADVERSION;
goto out;
}
rc = ldap_search_s((LDAP *) db->db, dn, LDAP_SCOPE_BASE,
"(objectclass=krb5Principal)", krb5principal_attrs,
0, &res);
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_search_s: %s", ldap_err2string(rc));
ret = HDB_ERR_NOENTRY;
goto out;
}
e = ldap_first_entry((LDAP *) db->db, res);
if (e == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
values = ldap_get_values((LDAP *) db->db, e, "krb5PrincipalName");
if (values == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
ret = krb5_parse_name(context, values[0], principal);
ldap_value_free(values);
out:
if (res != NULL) {
ldap_msgfree(res);
}
return ret;
}
static krb5_error_code
LDAP__lookup_princ(krb5_context context, HDB * db, const char *princname,
LDAPMessage ** msg)
{
krb5_error_code ret;
int rc, limit = 1;
char *filter = NULL;
(void) LDAP__connect(context, db);
rc =
asprintf(&filter,
"(&(objectclass=krb5KDCEntry)(krb5PrincipalName=%s))",
princname);
if (rc < 0) {
krb5_set_error_string(context, "asprintf: out of memory");
ret = ENOMEM;
goto out;
}
rc = ldap_set_option((LDAP *) db->db, LDAP_OPT_SIZELIMIT, (const void *)&limit);
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_set_option: %s", ldap_err2string(rc));
ret = HDB_ERR_BADVERSION;
goto out;
}
rc = ldap_search_s((LDAP *) db->db, db->name, LDAP_SCOPE_ONELEVEL, filter,
krb5kdcentry_attrs, 0, msg);
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_search_s: %s", ldap_err2string(rc));
ret = HDB_ERR_NOENTRY;
goto out;
}
ret = 0;
out:
if (filter != NULL) {
free(filter);
}
return ret;
}
static krb5_error_code
LDAP_principal2message(krb5_context context, HDB * db,
krb5_principal princ, LDAPMessage ** msg)
{
char *princname = NULL;
krb5_error_code ret;
ret = krb5_unparse_name(context, princ, &princname);
if (ret != 0) {
return ret;
}
ret = LDAP__lookup_princ(context, db, princname, msg);
free(princname);
return ret;
}
/*
* Construct an hdb_entry from a directory entry.
*/
static krb5_error_code
LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
hdb_entry * ent)
{
char *unparsed_name = NULL, *dn = NULL;
int ret;
unsigned long tmp;
struct berval **keys;
char **values;
memset(ent, 0, sizeof(*ent));
memset(&ent->flags, 0, sizeof(HDBFlags));
ret =
LDAP_get_string_value(db, msg, "krb5PrincipalName",
&unparsed_name);
if (ret != 0) {
return ret;
}
ret = krb5_parse_name(context, unparsed_name, &ent->principal);
if (ret != 0) {
goto out;
}
ret =
LDAP_get_integer_value(db, msg, "krb5KeyVersionNumber",
&ent->kvno);
if (ret != 0) {
ent->kvno = 0;
}
keys = ldap_get_values_len((LDAP *) db->db, msg, "krb5Key");
if (keys != NULL) {
int i;
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) {
krb5_set_error_string(context, "calloc: out of memory");
ret = ENOMEM;
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
}
ret =
LDAP_get_generalized_time_value(db, msg, "createTimestamp",
&ent->created_by.time);
if (ret != 0) {
ent->created_by.time = time(NULL);
}
ent->created_by.principal = NULL;
ret = LDAP_get_string_value(db, msg, "creatorsName", &dn);
if (ret == 0) {
if (LDAP_dn2principal(context, db, dn, &ent->created_by.principal)
!= 0) {
ent->created_by.principal = NULL;
}
free(dn);
}
ent->modified_by = (Event *) malloc(sizeof(Event));
if (ent->modified_by == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
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 (LDAP_dn2principal
(context, db, dn, &ent->modified_by->principal) != 0) {
ent->modified_by->principal = NULL;
}
free(dn);
} else {
free(ent->modified_by);
ent->modified_by = NULL;
}
if ((ent->valid_start = (KerberosTime *) malloc(sizeof(KerberosTime)))
== NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
ret =
LDAP_get_generalized_time_value(db, msg, "krb5ValidStart",
ent->valid_start);
if (ret != 0) {
/* OPTIONAL */
free(ent->valid_start);
ent->valid_start = NULL;
}
if ((ent->valid_end = (KerberosTime *) malloc(sizeof(KerberosTime))) ==
NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
ret =
LDAP_get_generalized_time_value(db, msg, "krb5ValidEnd",
ent->valid_end);
if (ret != 0) {
/* OPTIONAL */
free(ent->valid_end);
ent->valid_end = NULL;
}
if ((ent->pw_end = (KerberosTime *) malloc(sizeof(KerberosTime))) ==
NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
ret =
LDAP_get_generalized_time_value(db, msg, "krb5PasswordEnd",
ent->pw_end);
if (ret != 0) {
/* OPTIONAL */
free(ent->pw_end);
ent->pw_end = NULL;
}
ent->max_life = (int *) malloc(sizeof(int));
if (ent->max_life == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
ret = LDAP_get_integer_value(db, msg, "krb5MaxLife", ent->max_life);
if (ret != 0) {
free(ent->max_life);
ent->max_life = NULL;
}
ent->max_renew = (int *) malloc(sizeof(int));
if (ent->max_renew == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
ret = LDAP_get_integer_value(db, msg, "krb5MaxRenew", ent->max_renew);
if (ret != 0) {
free(ent->max_renew);
ent->max_renew = NULL;
}
values = ldap_get_values((LDAP *) db->db, msg, "krb5KDCFlags");
if (values != NULL) {
tmp = strtoul(values[0], (char **) NULL, 10);
if (tmp == ULONG_MAX && errno == ERANGE) {
krb5_set_error_string(context, "strtoul: could not convert flag");
ret = ERANGE;
goto out;
}
} else {
tmp = 0;
}
memcpy(&ent->flags, &tmp, sizeof(HDBFlags));
values = ldap_get_values((LDAP *) db->db, msg, "krb5EncryptionType");
if (values != NULL) {
int i;
ent->etypes = malloc(sizeof(*(ent->etypes)));
if (ent->etypes == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
ent->etypes->len = ldap_count_values(values);
ent->etypes->val = calloc(ent->etypes->len, sizeof(int));
for (i = 0; i < ent->etypes->len; i++) {
ent->etypes->val[i] = atoi(values[i]);
}
ldap_value_free(values);
}
ret = 0;
out:
if (unparsed_name != NULL) {
free(unparsed_name);
}
if (ret != 0) {
/* I don't think this frees ent itself. */
hdb_free_entry(context, ent);
}
return ret;
}
static krb5_error_code LDAP_close(krb5_context context, HDB * db)
{
ldap_unbind_ext((LDAP *) db->db, NULL, NULL);
db->db = 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 = db->openp; /* BOGUS OVERLOADING */
if (msgid < 0) {
return HDB_ERR_NOENTRY;
}
do {
rc = ldap_result((LDAP *) db->db, msgid, LDAP_MSG_ONE, NULL, &e);
switch (rc) {
case LDAP_RES_SEARCH_ENTRY:
/* We have an entry. Parse it. */
ret = LDAP_message2entry(context, db, e, 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((LDAP *) db->db, e, NULL, NULL, NULL,
NULL, NULL, 1);
if (parserc != LDAP_SUCCESS
&& parserc != LDAP_MORE_RESULTS_TO_RETURN) {
krb5_set_error_string(context, "ldap_parse_result: %s", ldap_err2string(parserc));
ldap_abandon((LDAP *) db->db, msgid);
}
ret = HDB_ERR_NOENTRY;
db->openp = -1;
break;
case 0:
case -1:
default:
/* Some unspecified error (timeout?). Abandon. */
ldap_msgfree(e);
ldap_abandon((LDAP *) db->db, msgid);
ret = HDB_ERR_NOENTRY;
db->openp = -1;
break;
}
} while (rc == LDAP_RES_SEARCH_REFERENCE);
if (ret == 0) {
if (db->master_key_set && (flags & HDB_F_DECRYPT)) {
ret = hdb_unseal_keys(context, db, entry);
if (ret)
hdb_free_entry(context,entry);
}
}
return ret;
}
static krb5_error_code
LDAP_firstkey(krb5_context context, HDB * db, unsigned flags,
hdb_entry * entry)
{
int msgid, limit = LDAP_NO_LIMIT, rc;
(void) LDAP__connect(context, db);
rc = ldap_set_option((LDAP *) db->db, LDAP_OPT_SIZELIMIT, (const void *)&limit);
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_set_option: %s", ldap_err2string(rc));
return HDB_ERR_BADVERSION;
}
msgid = ldap_search((LDAP *) db->db, db->name,
LDAP_SCOPE_ONELEVEL, "(objectclass=krb5KDCEntry)",
krb5kdcentry_attrs, 0);
if (msgid < 0) {
return HDB_ERR_NOENTRY;
}
db->openp = 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_rename(krb5_context context, HDB * db, const char *new_name)
{
return HDB_ERR_DB_INUSE;
}
static krb5_error_code LDAP__connect(krb5_context context, HDB * db)
{
int rc, version = LDAP_VERSION3;
if (db->db != NULL) {
/* connection has been opened. ping server. */
struct sockaddr_un addr;
socklen_t len;
int sd;
if (ldap_get_option((LDAP *) db->db, LDAP_OPT_DESC, &sd) == 0 &&
getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
/* the other end has died. reopen. */
LDAP_close(context, db);
}
}
if (db->db != NULL) {
/* server is UP */
return 0;
}
rc = ldap_initialize((LDAP **) & db->db, "ldapi:///");
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_initialize: %s", ldap_err2string(rc));
return HDB_ERR_NOENTRY;
}
rc = ldap_set_option((LDAP *) db->db, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version);
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_set_option: %s", ldap_err2string(rc));
ldap_unbind_ext((LDAP *) db->db, NULL, NULL);
db->db = NULL;
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(krb5_context context, HDB * db, unsigned flags,
hdb_entry * entry)
{
LDAPMessage *msg, *e;
krb5_error_code ret;
ret = LDAP_principal2message(context, db, entry->principal, &msg);
if (ret != 0) {
return ret;
}
e = ldap_first_entry((LDAP *) db->db, msg);
if (e == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
ret = LDAP_message2entry(context, db, e, entry);
if (ret == 0) {
if (db->master_key_set && (flags & HDB_F_DECRYPT)) {
ret = hdb_unseal_keys(context, db, entry);
if (ret)
hdb_free_entry(context,entry);
}
}
out:
ldap_msgfree(msg);
return ret;
}
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;
ret = krb5_unparse_name(context, entry->principal, &name);
if (ret != 0) {
goto out;
}
ret = LDAP__lookup_princ(context, db, name, &msg);
if (ret == 0) {
e = ldap_first_entry((LDAP *) db->db, msg);
}
ret = hdb_seal_keys(context, db, entry);
if (ret != 0) {
goto out;
}
/* turn new entry into LDAPMod array */
ret = LDAP_entry2mods(context, db, entry, e, &mods);
if (ret != 0) {
goto out;
}
if (e == NULL) {
/* Doesn't exist yet. */
char *p;
e = NULL;
/* normalize the naming attribute */
for (p = name; *p != '\0'; p++) {
*p = (char) tolower((int) *p);
}
/*
* We could do getpwnam() on the local component of
* the principal to find cn/sn but that's probably
* bad thing to do from inside a KDC. Better leave
* it to management tools.
*/
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "cn", name);
if (ret < 0) {
goto out;
}
ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "sn", name);
if (ret < 0) {
goto out;
}
if (db->name != NULL) {
ret = asprintf(&dn, "cn=%s,%s", name, db->name);
} else {
/* A bit bogus, but we don't have a search base */
ret = asprintf(&dn, "cn=%s", name, db->name);
}
if (ret < 0) {
krb5_set_error_string(context, "asprintf: out of memory");
ret = ENOMEM;
goto out;
}
} else if (flags & HDB_F_REPLACE) {
/* Entry exists, and we're allowed to replace it. */
dn = ldap_get_dn((LDAP *) db->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_s((LDAP *) db->db, dn, mods);
errfn = "ldap_add_s";
} else {
/* already existed, send deltas only */
rc = ldap_modify_s((LDAP *) db->db, dn, mods);
errfn = "ldap_modify_s";
}
if (rc == LDAP_SUCCESS) {
ret = 0;
} else {
krb5_set_error_string(context, "%s: %s", errfn, ldap_err2string(rc));
ret = HDB_ERR_CANT_LOCK_DB;
}
out:
/* free stuff */
if (dn != NULL) {
free(dn);
}
if (msg != NULL) {
ldap_msgfree(msg);
}
if (mods != NULL) {
ldap_mods_free(mods, 1);
}
if (name != NULL) {
free(name);
}
return ret;
}
static krb5_error_code
LDAP_remove(krb5_context context, HDB * db, hdb_entry * entry)
{
krb5_error_code ret;
LDAPMessage *msg, *e;
char *dn = NULL;
int rc, limit = LDAP_NO_LIMIT;
ret = LDAP_principal2message(context, db, entry->principal, &msg);
if (ret != 0) {
goto out;
}
e = ldap_first_entry((LDAP *) db->db, msg);
if (e == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
dn = ldap_get_dn((LDAP *) db->db, e);
if (dn == NULL) {
ret = HDB_ERR_NOENTRY;
goto out;
}
rc = ldap_set_option((LDAP *) db->db, LDAP_OPT_SIZELIMIT, (const void *)&limit);
if (rc != LDAP_SUCCESS) {
krb5_set_error_string(context, "ldap_set_option: %s", ldap_err2string(rc));
ret = HDB_ERR_BADVERSION;
goto out;
}
rc = ldap_delete_s((LDAP *) db->db, dn);
if (rc == LDAP_SUCCESS) {
ret = 0;
} else {
krb5_set_error_string(context, "ldap_delete_s: %s", ldap_err2string(rc));
ret = HDB_ERR_CANT_LOCK_DB;
}
out:
if (dn != NULL) {
free(dn);
}
if (msg != NULL) {
ldap_msgfree(msg);
}
return ret;
}
static krb5_error_code
LDAP__get(krb5_context context, HDB * db, krb5_data key, krb5_data * reply)
{
fprintf(stderr, "LDAP__get not implemented\n");
abort();
return 0;
}
static krb5_error_code
LDAP__put(krb5_context context, HDB * db, int replace,
krb5_data key, krb5_data value)
{
fprintf(stderr, "LDAP__put not implemented\n");
abort();
return 0;
}
static krb5_error_code
LDAP__del(krb5_context context, HDB * db, krb5_data key)
{
fprintf(stderr, "LDAP__del not implemented\n");
abort();
return 0;
}
static krb5_error_code LDAP_destroy(krb5_context context, HDB * db)
{
krb5_error_code ret;
ret = hdb_clear_master_key(context, db);
if (db->name != NULL) {
free(db->name);
}
free(db);
return ret;
}
krb5_error_code
hdb_ldap_create(krb5_context context, HDB ** db, const char *arg)
{
*db = malloc(sizeof(**db));
if (*db == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
}
(*db)->db = NULL;
if (arg == NULL || arg[0] == '\0') {
/*
* if no argument specified in the configuration file
* then use NULL, which tells OpenLDAP to look in
* the ldap.conf file. This doesn't work for
* writing entries because we don't know where to
* put new principals.
*/
(*db)->name = NULL;
} else {
(*db)->name = strdup(arg);
if ((*db)->name == NULL) {
krb5_set_error_string(context, "strdup: out of memory");
free(*db);
*db = NULL;
return ENOMEM;
}
}
(*db)->master_key_set = 0;
(*db)->openp = 0;
(*db)->open = LDAP_open;
(*db)->close = LDAP_close;
(*db)->fetch = LDAP_fetch;
(*db)->store = LDAP_store;
(*db)->remove = LDAP_remove;
(*db)->firstkey = LDAP_firstkey;
(*db)->nextkey = LDAP_nextkey;
(*db)->lock = LDAP_lock;
(*db)->unlock = LDAP_unlock;
(*db)->rename = LDAP_rename;
/* can we ditch these? */
(*db)->_get = LDAP__get;
(*db)->_put = LDAP__put;
(*db)->_del = LDAP__del;
(*db)->destroy = LDAP_destroy;
return 0;
}
#endif /* OPENLDAP */
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