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heimdal Add support for extracting a particular KVNO from the database

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This should allow master key rollover.

(but the real reason is to allow multiple krbtgt accounts, as used by
Active Directory to implement RODC support)

Signed-off-by: Love Hornquist Astrand <lha@h5l.org>
This commit is contained in:
Andrew Bartlett
2010-10-02 10:29:24 +10:00
committed by Love Hornquist Astrand
parent e189d712ce
commit f469fc6d49
10 changed files with 112 additions and 36 deletions
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19
lib/hdb/hdb-keytab.c
View File

@@ -117,13 +117,18 @@ hkt_open(krb5_context context, HDB * db, int flags, mode_t mode)
}
static krb5_error_code
hkt_fetch(krb5_context context, HDB * db, krb5_const_principal principal,
unsigned flags, hdb_entry_ex * entry)
hkt_fetch_kvno(krb5_context context, HDB * db, krb5_const_principal principal,
unsigned flags, unsigned kvno, hdb_entry_ex * entry)
{
hdb_keytab k = (hdb_keytab)db->hdb_db;
krb5_error_code ret;
krb5_keytab_entry ktentry;
if (!(flags & HDB_F_KVNO_SPECIFIED)) {
/* Preserve previous behaviour if no kvno specified */
kvno = 0;
}
memset(&ktentry, 0, sizeof(ktentry));
entry->entry.flags.server = 1;
@@ -143,7 +148,7 @@ hkt_fetch(krb5_context context, HDB * db, krb5_const_principal principal,
* enctypes should work.
*/
ret = krb5_kt_get_entry(context, k->keytab, principal, 0, 0, &ktentry);
ret = krb5_kt_get_entry(context, k->keytab, principal, kvno, 0, &ktentry);
if (ret) {
ret = HDB_ERR_NOENTRY;
goto out;
@@ -165,6 +170,13 @@ hkt_fetch(krb5_context context, HDB * db, krb5_const_principal principal,
return ret;
}
static krb5_error_code
hkt_fetch(krb5_context context, HDB * db, krb5_const_principal principal,
unsigned flags, hdb_entry_ex * entry)
{
return hkt_fetch_kvno(context, db, principal, flags & ~HDB_F_KVNO_SPECIFIED, 0, entry);
}
static krb5_error_code
hkt_store(krb5_context context, HDB * db, unsigned flags,
hdb_entry_ex * entry)
@@ -210,6 +222,7 @@ hdb_keytab_create(krb5_context context, HDB ** db, const char *arg)
(*db)->hdb_open = hkt_open;
(*db)->hdb_close = hkt_close;
(*db)->hdb_fetch = hkt_fetch;
(*db)->hdb_fetch_kvno = hkt_fetch_kvno;
(*db)->hdb_store = hkt_store;
(*db)->hdb_remove = NULL;
(*db)->hdb_firstkey = hkt_firstkey;

13
lib/hdb/hdb.h
View File

@@ -54,6 +54,7 @@ enum hdb_lockop{ HDB_RLOCK, HDB_WLOCK };
#define HDB_F_GET_ANY 28 /* fetch any of client,server,krbtgt */
#define HDB_F_CANON 32 /* want canonicalition */
#define HDB_F_ADMIN_DATA 64 /* want data that kdc don't use */
#define HDB_F_KVNO_SPECIFIED 128 /* we want a particular KVNO */
/* hdb_capability_flags */
#define HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL 1
@@ -129,8 +130,18 @@ typedef struct HDB{
* should be fetch: client, server, krbtgt.
*/
krb5_error_code (*hdb_fetch)(krb5_context, struct HDB*,
krb5_const_principal, unsigned,
krb5_const_principal, unsigned,
hdb_entry_ex*);
/**
* Fetch an entry from the backend
*
* Fetch an entry from the backend, flags are what type of entry
* should be fetch: client, server, krbtgt.
* knvo (if specified and flags HDB_F_KVNO_SPECIFIED set) is the kvno to get
*/
krb5_error_code (*hdb_fetch_kvno)(krb5_context, struct HDB*,
krb5_const_principal, unsigned, unsigned,
hdb_entry_ex*);
/**
* Store an entry to database
*/

16
lib/hdb/keytab.c
View File

@@ -210,10 +210,18 @@ hdb_get_entry(krb5_context context,
(*db->hdb_destroy)(context, db);
goto out2;
}
ret = (*db->hdb_fetch)(context, db, principal,
HDB_F_DECRYPT|
HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
&ent);
if (*db->hdb_fetch_kvno) {
ret = (*db->hdb_fetch_kvno)(context, db, principal,
HDB_F_DECRYPT|HDB_F_KVNO_SPECIFIED|
HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
kvno, &ent);
} else {
ret = (*db->hdb_fetch)(context, db, principal,
HDB_F_DECRYPT|
HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
&ent);
}
if(ret == HDB_ERR_NOENTRY) {
ret = KRB5_KT_NOTFOUND;