The following issues are patched: - CVE-2022-42898 PAC parse integer overflows - CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour - CVE-2021-44758 NULL dereference DoS in SPNEGO acceptors - CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec Note that CVE-2022-44640 is a severe vulnerability, possibly a 10.0 on the Common Vulnerability Scoring System (CVSS) v3, as we believe it should be possible to get an RCE on a KDC, which means that credentials can be compromised that can be used to impersonate anyone in a realm or forest of realms. Heimdal's ASN.1 compiler generates code that allows specially crafted DER encodings of CHOICEs to invoke the wrong free function on the decoded structure upon decode error. This is known to impact the Heimdal KDC, leading to an invalid free() of an address partly or wholly under the control of the attacker, in turn leading to a potential remote code execution (RCE) vulnerability. This error affects the DER codec for all extensible CHOICE types used in Heimdal, though not all cases will be exploitable. We have not completed a thorough analysis of all the Heimdal components affected, thus the Kerberos client, the X.509 library, and other parts, may be affected as well. This bug has been in Heimdal's ASN.1 compiler since 2005, but it may only affect Heimdal 1.6 and up. It was first reported by Douglas Bagnall, though it had been found independently by the Heimdal maintainers via fuzzing a few weeks earlier. While no zero-day exploit is known, such an exploit will likely be available soon after public disclosure. - CVE-2019-14870: Validate client attributes in protocol-transition - CVE-2019-14870: Apply forwardable policy in protocol-transition - CVE-2019-14870: Always lookup impersonate client in DB Sponsored by: so (philip) Obtained from: so (philip) Tested by: philip, cy MFC after: immediately
818 lines
22 KiB
C
818 lines
22 KiB
C
/*
|
|
* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Portions Copyright (c) 2009 Apple Inc. 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.
|
|
*/
|
|
|
|
#define KRB5_KDB_DISALLOW_POSTDATED 0x00000001
|
|
#define KRB5_KDB_DISALLOW_FORWARDABLE 0x00000002
|
|
#define KRB5_KDB_DISALLOW_TGT_BASED 0x00000004
|
|
#define KRB5_KDB_DISALLOW_RENEWABLE 0x00000008
|
|
#define KRB5_KDB_DISALLOW_PROXIABLE 0x00000010
|
|
#define KRB5_KDB_DISALLOW_DUP_SKEY 0x00000020
|
|
#define KRB5_KDB_DISALLOW_ALL_TIX 0x00000040
|
|
#define KRB5_KDB_REQUIRES_PRE_AUTH 0x00000080
|
|
#define KRB5_KDB_REQUIRES_HW_AUTH 0x00000100
|
|
#define KRB5_KDB_REQUIRES_PWCHANGE 0x00000200
|
|
#define KRB5_KDB_DISALLOW_SVR 0x00001000
|
|
#define KRB5_KDB_PWCHANGE_SERVICE 0x00002000
|
|
#define KRB5_KDB_SUPPORT_DESMD5 0x00004000
|
|
#define KRB5_KDB_NEW_PRINC 0x00008000
|
|
|
|
/*
|
|
|
|
key: krb5_unparse_name + NUL
|
|
|
|
16: baselength
|
|
32: attributes
|
|
32: max time
|
|
32: max renewable time
|
|
32: client expire
|
|
32: passwd expire
|
|
32: last successful passwd
|
|
32: last failed attempt
|
|
32: num of failed attempts
|
|
16: num tl data
|
|
16: num data data
|
|
16: principal length
|
|
length: principal
|
|
for num tl data times
|
|
16: tl data type
|
|
16: tl data length
|
|
length: length
|
|
for num key data times
|
|
16: version (num keyblocks)
|
|
16: kvno
|
|
for version times:
|
|
16: type
|
|
16: length
|
|
length: keydata
|
|
|
|
|
|
key_data_contents[0]
|
|
|
|
int16: length
|
|
read-of-data: key-encrypted, key-usage 0, master-key
|
|
|
|
salt:
|
|
version2 = salt in key_data->key_data_contents[1]
|
|
else default salt.
|
|
|
|
*/
|
|
|
|
#include "hdb_locl.h"
|
|
|
|
#define KDB_V1_BASE_LENGTH 38
|
|
|
|
#if HAVE_DB1
|
|
|
|
#if defined(HAVE_DB_185_H)
|
|
#include <db_185.h>
|
|
#elif defined(HAVE_DB_H)
|
|
#include <db.h>
|
|
#endif
|
|
|
|
#define CHECK(x) do { if ((x)) goto out; } while(0)
|
|
|
|
static krb5_error_code
|
|
mdb_principal2key(krb5_context context,
|
|
krb5_const_principal principal,
|
|
krb5_data *key)
|
|
{
|
|
krb5_error_code ret;
|
|
char *str;
|
|
|
|
ret = krb5_unparse_name(context, principal, &str);
|
|
if (ret)
|
|
return ret;
|
|
key->data = str;
|
|
key->length = strlen(str) + 1;
|
|
return 0;
|
|
}
|
|
|
|
#define KRB5_KDB_SALTTYPE_NORMAL 0
|
|
#define KRB5_KDB_SALTTYPE_V4 1
|
|
#define KRB5_KDB_SALTTYPE_NOREALM 2
|
|
#define KRB5_KDB_SALTTYPE_ONLYREALM 3
|
|
#define KRB5_KDB_SALTTYPE_SPECIAL 4
|
|
#define KRB5_KDB_SALTTYPE_AFS3 5
|
|
#define KRB5_KDB_SALTTYPE_CERTHASH 6
|
|
|
|
static krb5_error_code
|
|
fix_salt(krb5_context context, hdb_entry *ent, int key_num)
|
|
{
|
|
krb5_error_code ret;
|
|
Salt *salt = ent->keys.val[key_num].salt;
|
|
/* fix salt type */
|
|
switch((int)salt->type) {
|
|
case KRB5_KDB_SALTTYPE_NORMAL:
|
|
salt->type = KRB5_PADATA_PW_SALT;
|
|
break;
|
|
case KRB5_KDB_SALTTYPE_V4:
|
|
krb5_data_free(&salt->salt);
|
|
salt->type = KRB5_PADATA_PW_SALT;
|
|
break;
|
|
case KRB5_KDB_SALTTYPE_NOREALM:
|
|
{
|
|
size_t len;
|
|
size_t i;
|
|
char *p;
|
|
|
|
len = 0;
|
|
for (i = 0; i < ent->principal->name.name_string.len; ++i)
|
|
len += strlen(ent->principal->name.name_string.val[i]);
|
|
ret = krb5_data_alloc (&salt->salt, len);
|
|
if (ret)
|
|
return ret;
|
|
p = salt->salt.data;
|
|
for (i = 0; i < ent->principal->name.name_string.len; ++i) {
|
|
memcpy (p,
|
|
ent->principal->name.name_string.val[i],
|
|
strlen(ent->principal->name.name_string.val[i]));
|
|
p += strlen(ent->principal->name.name_string.val[i]);
|
|
}
|
|
|
|
salt->type = KRB5_PADATA_PW_SALT;
|
|
break;
|
|
}
|
|
case KRB5_KDB_SALTTYPE_ONLYREALM:
|
|
krb5_data_free(&salt->salt);
|
|
ret = krb5_data_copy(&salt->salt,
|
|
ent->principal->realm,
|
|
strlen(ent->principal->realm));
|
|
if(ret)
|
|
return ret;
|
|
salt->type = KRB5_PADATA_PW_SALT;
|
|
break;
|
|
case KRB5_KDB_SALTTYPE_SPECIAL:
|
|
salt->type = KRB5_PADATA_PW_SALT;
|
|
break;
|
|
case KRB5_KDB_SALTTYPE_AFS3:
|
|
krb5_data_free(&salt->salt);
|
|
ret = krb5_data_copy(&salt->salt,
|
|
ent->principal->realm,
|
|
strlen(ent->principal->realm));
|
|
if(ret)
|
|
return ret;
|
|
salt->type = KRB5_PADATA_AFS3_SALT;
|
|
break;
|
|
case KRB5_KDB_SALTTYPE_CERTHASH:
|
|
krb5_data_free(&salt->salt);
|
|
free(ent->keys.val[key_num].salt);
|
|
ent->keys.val[key_num].salt = NULL;
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
mdb_value2entry(krb5_context context, krb5_data *data, krb5_kvno kvno, hdb_entry *entry)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_storage *sp;
|
|
uint32_t u32;
|
|
uint16_t u16, num_keys, num_tl;
|
|
size_t i, j;
|
|
char *p;
|
|
|
|
sp = krb5_storage_from_data(data);
|
|
if (sp == NULL) {
|
|
krb5_set_error_message(context, ENOMEM, "out of memory");
|
|
return ENOMEM;
|
|
}
|
|
|
|
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_LE);
|
|
|
|
/*
|
|
* 16: baselength
|
|
*
|
|
* The story here is that these 16 bits have to be a constant:
|
|
* KDB_V1_BASE_LENGTH. Once upon a time a different value here
|
|
* would have been used to indicate the presence of "extra data"
|
|
* between the "base" contents and the {principal name, TL data,
|
|
* keys} that follow it. Nothing supports such "extra data"
|
|
* nowadays, so neither do we here.
|
|
*
|
|
* XXX But... surely we ought to log about this extra data, or skip
|
|
* it, or something, in case anyone has MIT KDBs with ancient
|
|
* entries in them... Logging would allow the admin to know which
|
|
* entries to dump with MIT krb5's kdb5_util.
|
|
*/
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
if (u16 != KDB_V1_BASE_LENGTH) { ret = EINVAL; goto out; }
|
|
/* 32: attributes */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
entry->flags.postdate = !(u32 & KRB5_KDB_DISALLOW_POSTDATED);
|
|
entry->flags.forwardable = !(u32 & KRB5_KDB_DISALLOW_FORWARDABLE);
|
|
entry->flags.initial = !!(u32 & KRB5_KDB_DISALLOW_TGT_BASED);
|
|
entry->flags.renewable = !(u32 & KRB5_KDB_DISALLOW_RENEWABLE);
|
|
entry->flags.proxiable = !(u32 & KRB5_KDB_DISALLOW_PROXIABLE);
|
|
/* DUP_SKEY */
|
|
entry->flags.invalid = !!(u32 & KRB5_KDB_DISALLOW_ALL_TIX);
|
|
entry->flags.require_preauth =!!(u32 & KRB5_KDB_REQUIRES_PRE_AUTH);
|
|
entry->flags.require_hwauth =!!(u32 & KRB5_KDB_REQUIRES_HW_AUTH);
|
|
entry->flags.server = !(u32 & KRB5_KDB_DISALLOW_SVR);
|
|
entry->flags.change_pw = !!(u32 & KRB5_KDB_PWCHANGE_SERVICE);
|
|
entry->flags.client = 1; /* XXX */
|
|
|
|
/* 32: max time */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
if (u32) {
|
|
entry->max_life = malloc(sizeof(*entry->max_life));
|
|
*entry->max_life = u32;
|
|
}
|
|
/* 32: max renewable time */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
if (u32) {
|
|
entry->max_renew = malloc(sizeof(*entry->max_renew));
|
|
*entry->max_renew = u32;
|
|
}
|
|
/* 32: client expire */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
if (u32) {
|
|
entry->valid_end = malloc(sizeof(*entry->valid_end));
|
|
*entry->valid_end = u32;
|
|
}
|
|
/* 32: passwd expire */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
if (u32) {
|
|
entry->pw_end = malloc(sizeof(*entry->pw_end));
|
|
*entry->pw_end = u32;
|
|
}
|
|
/* 32: last successful passwd */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
/* 32: last failed attempt */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
/* 32: num of failed attempts */
|
|
CHECK(ret = krb5_ret_uint32(sp, &u32));
|
|
/* 16: num tl data */
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
num_tl = u16;
|
|
/* 16: num key data */
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
num_keys = u16;
|
|
/* 16: principal length */
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
/* length: principal */
|
|
{
|
|
/*
|
|
* Note that the principal name includes the NUL in the entry,
|
|
* but we don't want to take chances, so we add an extra NUL.
|
|
*/
|
|
p = malloc(u16 + 1);
|
|
if (p == NULL) {
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
krb5_storage_read(sp, p, u16);
|
|
p[u16] = '\0';
|
|
CHECK(ret = krb5_parse_name(context, p, &entry->principal));
|
|
free(p);
|
|
}
|
|
/* for num tl data times
|
|
16: tl data type
|
|
16: tl data length
|
|
length: length */
|
|
for (i = 0; i < num_tl; i++) {
|
|
/* 16: TL data type */
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
/* 16: TL data length */
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
krb5_storage_seek(sp, u16, SEEK_CUR);
|
|
}
|
|
/*
|
|
* for num key data times
|
|
* 16: "version"
|
|
* 16: kvno
|
|
* for version times:
|
|
* 16: type
|
|
* 16: length
|
|
* length: keydata
|
|
*
|
|
* "version" here is really 1 or 2, the first meaning there's only
|
|
* keys for this kvno, the second meaning there's keys and salt[s?].
|
|
* That's right... hold that gag reflex, you can do it.
|
|
*/
|
|
for (i = 0; i < num_keys; i++) {
|
|
int keep = 0;
|
|
uint16_t version;
|
|
void *ptr;
|
|
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
version = u16;
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
|
|
/*
|
|
* First time through, and until we find one matching key,
|
|
* entry->kvno == 0.
|
|
*/
|
|
if ((entry->kvno < u16) && (kvno == 0 || kvno == u16)) {
|
|
keep = 1;
|
|
entry->kvno = u16;
|
|
/*
|
|
* Found a higher kvno than earlier, so free the old highest
|
|
* kvno keys.
|
|
*
|
|
* XXX Of course, we actually want to extract the old kvnos
|
|
* as well, for some of the kadm5 APIs. We shouldn't free
|
|
* these keys, but keep them elsewhere.
|
|
*/
|
|
for (j = 0; j < entry->keys.len; j++)
|
|
free_Key(&entry->keys.val[j]);
|
|
free(entry->keys.val);
|
|
entry->keys.len = 0;
|
|
entry->keys.val = NULL;
|
|
} else if (entry->kvno == u16)
|
|
/* Accumulate keys */
|
|
keep = 1;
|
|
|
|
if (keep) {
|
|
Key *k;
|
|
|
|
ptr = realloc(entry->keys.val, sizeof(entry->keys.val[0]) * (entry->keys.len + 1));
|
|
if (ptr == NULL) {
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
entry->keys.val = ptr;
|
|
|
|
/* k points to current Key */
|
|
k = &entry->keys.val[entry->keys.len];
|
|
|
|
memset(k, 0, sizeof(*k));
|
|
entry->keys.len += 1;
|
|
|
|
k->mkvno = malloc(sizeof(*k->mkvno));
|
|
if (k->mkvno == NULL) {
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
*k->mkvno = 1;
|
|
|
|
for (j = 0; j < version; j++) {
|
|
uint16_t type;
|
|
CHECK(ret = krb5_ret_uint16(sp, &type));
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
if (j == 0) {
|
|
/* This "version" means we have a key */
|
|
k->key.keytype = type;
|
|
if (u16 < 2) {
|
|
ret = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* MIT stores keys encrypted keys as {16-bit length
|
|
* of plaintext key, {encrypted key}}. The reason
|
|
* for this is that the Kerberos cryptosystem is not
|
|
* length-preserving. Heimdal's approach is to
|
|
* truncate the plaintext to the expected length of
|
|
* the key given its enctype, so we ignore this
|
|
* 16-bit length-of-plaintext-key field.
|
|
*/
|
|
krb5_storage_seek(sp, 2, SEEK_CUR); /* skip real length */
|
|
k->key.keyvalue.length = u16 - 2; /* adjust cipher len */
|
|
k->key.keyvalue.data = malloc(k->key.keyvalue.length);
|
|
krb5_storage_read(sp, k->key.keyvalue.data,
|
|
k->key.keyvalue.length);
|
|
} else if (j == 1) {
|
|
/* This "version" means we have a salt */
|
|
k->salt = calloc(1, sizeof(*k->salt));
|
|
if (k->salt == NULL) {
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
k->salt->type = type;
|
|
if (u16 != 0) {
|
|
k->salt->salt.data = malloc(u16);
|
|
if (k->salt->salt.data == NULL) {
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
k->salt->salt.length = u16;
|
|
krb5_storage_read(sp, k->salt->salt.data, k->salt->salt.length);
|
|
}
|
|
fix_salt(context, entry, entry->keys.len - 1);
|
|
} else {
|
|
/*
|
|
* Whatever this "version" might be, we skip it
|
|
*
|
|
* XXX A krb5.conf parameter requesting that we log
|
|
* about strangeness like this, or return an error
|
|
* from here, might be nice.
|
|
*/
|
|
krb5_storage_seek(sp, u16, SEEK_CUR);
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* XXX For now we skip older kvnos, but we should extract
|
|
* them...
|
|
*/
|
|
for (j = 0; j < version; j++) {
|
|
/* enctype */
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
/* encrypted key (or plaintext salt) */
|
|
CHECK(ret = krb5_ret_uint16(sp, &u16));
|
|
krb5_storage_seek(sp, u16, SEEK_CUR);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (entry->kvno == 0 && kvno != 0) {
|
|
ret = HDB_ERR_NOT_FOUND_HERE;
|
|
goto out;
|
|
}
|
|
|
|
return 0;
|
|
out:
|
|
if (ret == HEIM_ERR_EOF)
|
|
/* Better error code than "end of file" */
|
|
ret = HEIM_ERR_BAD_HDBENT_ENCODING;
|
|
return ret;
|
|
}
|
|
|
|
#if 0
|
|
static krb5_error_code
|
|
mdb_entry2value(krb5_context context, hdb_entry *entry, krb5_data *data)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
#endif
|
|
|
|
|
|
static krb5_error_code
|
|
mdb_close(krb5_context context, HDB *db)
|
|
{
|
|
DB *d = (DB*)db->hdb_db;
|
|
(*d->close)(d);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_destroy(krb5_context context, HDB *db)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
ret = hdb_clear_master_key (context, db);
|
|
free(db->hdb_name);
|
|
free(db);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_lock(krb5_context context, HDB *db, int operation)
|
|
{
|
|
DB *d = (DB*)db->hdb_db;
|
|
int fd = (*d->fd)(d);
|
|
if(fd < 0) {
|
|
krb5_set_error_message(context, HDB_ERR_CANT_LOCK_DB,
|
|
"Can't lock database: %s", db->hdb_name);
|
|
return HDB_ERR_CANT_LOCK_DB;
|
|
}
|
|
return hdb_lock(fd, operation);
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_unlock(krb5_context context, HDB *db)
|
|
{
|
|
DB *d = (DB*)db->hdb_db;
|
|
int fd = (*d->fd)(d);
|
|
if(fd < 0) {
|
|
krb5_set_error_message(context, HDB_ERR_CANT_LOCK_DB,
|
|
"Can't unlock database: %s", db->hdb_name);
|
|
return HDB_ERR_CANT_LOCK_DB;
|
|
}
|
|
return hdb_unlock(fd);
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
mdb_seq(krb5_context context, HDB *db,
|
|
unsigned flags, hdb_entry_ex *entry, int flag)
|
|
{
|
|
DB *d = (DB*)db->hdb_db;
|
|
DBT key, value;
|
|
krb5_data key_data, data;
|
|
int code;
|
|
|
|
code = db->hdb_lock(context, db, HDB_RLOCK);
|
|
if(code == -1) {
|
|
krb5_set_error_message(context, HDB_ERR_DB_INUSE, "Database %s in use", db->hdb_name);
|
|
return HDB_ERR_DB_INUSE;
|
|
}
|
|
code = (*d->seq)(d, &key, &value, flag);
|
|
db->hdb_unlock(context, db); /* XXX check value */
|
|
if(code == -1) {
|
|
code = errno;
|
|
krb5_set_error_message(context, code, "Database %s seq error: %s",
|
|
db->hdb_name, strerror(code));
|
|
return code;
|
|
}
|
|
if(code == 1) {
|
|
krb5_clear_error_message(context);
|
|
return HDB_ERR_NOENTRY;
|
|
}
|
|
|
|
key_data.data = key.data;
|
|
key_data.length = key.size;
|
|
data.data = value.data;
|
|
data.length = value.size;
|
|
memset(entry, 0, sizeof(*entry));
|
|
|
|
if (mdb_value2entry(context, &data, 0, &entry->entry))
|
|
return mdb_seq(context, db, flags, entry, R_NEXT);
|
|
|
|
if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
|
|
code = hdb_unseal_keys (context, db, &entry->entry);
|
|
if (code)
|
|
hdb_free_entry (context, entry);
|
|
}
|
|
|
|
return code;
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
mdb_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
|
|
{
|
|
return mdb_seq(context, db, flags, entry, R_FIRST);
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
mdb_nextkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
|
|
{
|
|
return mdb_seq(context, db, flags, entry, R_NEXT);
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_rename(krb5_context context, HDB *db, const char *new_name)
|
|
{
|
|
int ret;
|
|
char *old, *new;
|
|
|
|
asprintf(&old, "%s.db", db->hdb_name);
|
|
asprintf(&new, "%s.db", new_name);
|
|
ret = rename(old, new);
|
|
free(old);
|
|
free(new);
|
|
if(ret)
|
|
return errno;
|
|
|
|
free(db->hdb_name);
|
|
db->hdb_name = strdup(new_name);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
|
|
{
|
|
DB *d = (DB*)db->hdb_db;
|
|
DBT k, v;
|
|
int code;
|
|
|
|
k.data = key.data;
|
|
k.size = key.length;
|
|
code = db->hdb_lock(context, db, HDB_RLOCK);
|
|
if(code)
|
|
return code;
|
|
code = (*d->get)(d, &k, &v, 0);
|
|
db->hdb_unlock(context, db);
|
|
if(code < 0) {
|
|
code = errno;
|
|
krb5_set_error_message(context, code, "Database %s get error: %s",
|
|
db->hdb_name, strerror(code));
|
|
return code;
|
|
}
|
|
if(code == 1) {
|
|
krb5_clear_error_message(context);
|
|
return HDB_ERR_NOENTRY;
|
|
}
|
|
|
|
krb5_data_copy(reply, v.data, v.size);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb__put(krb5_context context, HDB *db, int replace,
|
|
krb5_data key, krb5_data value)
|
|
{
|
|
DB *d = (DB*)db->hdb_db;
|
|
DBT k, v;
|
|
int code;
|
|
|
|
k.data = key.data;
|
|
k.size = key.length;
|
|
v.data = value.data;
|
|
v.size = value.length;
|
|
code = db->hdb_lock(context, db, HDB_WLOCK);
|
|
if(code)
|
|
return code;
|
|
code = (*d->put)(d, &k, &v, replace ? 0 : R_NOOVERWRITE);
|
|
db->hdb_unlock(context, db);
|
|
if(code < 0) {
|
|
code = errno;
|
|
krb5_set_error_message(context, code, "Database %s put error: %s",
|
|
db->hdb_name, strerror(code));
|
|
return code;
|
|
}
|
|
if(code == 1) {
|
|
krb5_clear_error_message(context);
|
|
return HDB_ERR_EXISTS;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb__del(krb5_context context, HDB *db, krb5_data key)
|
|
{
|
|
DB *d = (DB*)db->hdb_db;
|
|
DBT k;
|
|
krb5_error_code code;
|
|
k.data = key.data;
|
|
k.size = key.length;
|
|
code = db->hdb_lock(context, db, HDB_WLOCK);
|
|
if(code)
|
|
return code;
|
|
code = (*d->del)(d, &k, 0);
|
|
db->hdb_unlock(context, db);
|
|
if(code == 1) {
|
|
code = errno;
|
|
krb5_set_error_message(context, code, "Database %s put error: %s",
|
|
db->hdb_name, strerror(code));
|
|
return code;
|
|
}
|
|
if(code < 0)
|
|
return errno;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_fetch_kvno(krb5_context context, HDB *db, krb5_const_principal principal,
|
|
unsigned flags, krb5_kvno kvno, hdb_entry_ex *entry)
|
|
{
|
|
krb5_data key, value;
|
|
krb5_error_code code;
|
|
|
|
code = mdb_principal2key(context, principal, &key);
|
|
if (code)
|
|
return code;
|
|
code = db->hdb__get(context, db, key, &value);
|
|
krb5_data_free(&key);
|
|
if(code)
|
|
return code;
|
|
code = mdb_value2entry(context, &value, kvno, &entry->entry);
|
|
krb5_data_free(&value);
|
|
if (code)
|
|
return code;
|
|
|
|
if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
|
|
code = hdb_unseal_keys (context, db, &entry->entry);
|
|
if (code)
|
|
hdb_free_entry(context, entry);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
|
|
{
|
|
krb5_set_error_message(context, EINVAL, "can't set principal in mdb");
|
|
return EINVAL;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_remove(krb5_context context, HDB *db, krb5_const_principal principal)
|
|
{
|
|
krb5_error_code code;
|
|
krb5_data key;
|
|
|
|
code = db->hdb__del(context, db, key);
|
|
krb5_data_free(&key);
|
|
return code;
|
|
}
|
|
|
|
static krb5_error_code
|
|
mdb_open(krb5_context context, HDB *db, int flags, mode_t mode)
|
|
{
|
|
char *fn;
|
|
krb5_error_code ret;
|
|
|
|
asprintf(&fn, "%s.db", db->hdb_name);
|
|
if (fn == NULL) {
|
|
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
db->hdb_db = dbopen(fn, flags, mode, DB_BTREE, NULL);
|
|
free(fn);
|
|
|
|
if (db->hdb_db == NULL) {
|
|
switch (errno) {
|
|
#ifdef EFTYPE
|
|
case EFTYPE:
|
|
#endif
|
|
case EINVAL:
|
|
db->hdb_db = dbopen(fn, flags, mode, DB_BTREE, NULL);
|
|
}
|
|
}
|
|
|
|
/* try to open without .db extension */
|
|
if(db->hdb_db == NULL && errno == ENOENT)
|
|
db->hdb_db = dbopen(db->hdb_name, flags, mode, DB_BTREE, NULL);
|
|
if(db->hdb_db == NULL) {
|
|
ret = errno;
|
|
krb5_set_error_message(context, ret, "dbopen (%s): %s",
|
|
db->hdb_name, strerror(ret));
|
|
return ret;
|
|
}
|
|
if((flags & O_ACCMODE) == O_RDONLY)
|
|
ret = hdb_check_db_format(context, db);
|
|
else
|
|
ret = hdb_init_db(context, db);
|
|
if(ret == HDB_ERR_NOENTRY) {
|
|
krb5_clear_error_message(context);
|
|
return 0;
|
|
}
|
|
if (ret) {
|
|
mdb_close(context, db);
|
|
krb5_set_error_message(context, ret, "hdb_open: failed %s database %s",
|
|
(flags & O_ACCMODE) == O_RDONLY ?
|
|
"checking format of" : "initialize",
|
|
db->hdb_name);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
hdb_mdb_create(krb5_context context, HDB **db,
|
|
const char *filename)
|
|
{
|
|
*db = calloc(1, sizeof(**db));
|
|
if (*db == NULL) {
|
|
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
|
|
(*db)->hdb_db = NULL;
|
|
(*db)->hdb_name = strdup(filename);
|
|
if ((*db)->hdb_name == NULL) {
|
|
free(*db);
|
|
*db = NULL;
|
|
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
(*db)->hdb_master_key_set = 0;
|
|
(*db)->hdb_openp = 0;
|
|
(*db)->hdb_capability_flags = 0;
|
|
(*db)->hdb_open = mdb_open;
|
|
(*db)->hdb_close = mdb_close;
|
|
(*db)->hdb_fetch_kvno = mdb_fetch_kvno;
|
|
(*db)->hdb_store = mdb_store;
|
|
(*db)->hdb_remove = mdb_remove;
|
|
(*db)->hdb_firstkey = mdb_firstkey;
|
|
(*db)->hdb_nextkey= mdb_nextkey;
|
|
(*db)->hdb_lock = mdb_lock;
|
|
(*db)->hdb_unlock = mdb_unlock;
|
|
(*db)->hdb_rename = mdb_rename;
|
|
(*db)->hdb__get = mdb__get;
|
|
(*db)->hdb__put = mdb__put;
|
|
(*db)->hdb__del = mdb__del;
|
|
(*db)->hdb_destroy = mdb_destroy;
|
|
return 0;
|
|
}
|
|
|
|
#endif /* HAVE_DB1 */
|