static krb5_error_code
DB_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 (hdb_value2entry(context, &data, &entry->entry))
return DB_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);
}
if (code == 0 && entry->entry.principal == NULL) {
entry->entry.principal = malloc(sizeof(*entry->entry.principal));
if (entry->entry.principal == NULL) {
code = ENOMEM;
krb5_set_error_message(context, code, "malloc: out of memory");
hdb_free_entry (context, entry);
} else {
hdb_key2principal(context, &key_data, entry->entry.principal);
}
}
return code;
}
static krb5_error_code
DB_seq(krb5_context context, HDB *db,
unsigned flags, hdb_entry_ex *entry, int flag)
{
DBT key, value;
DBC *dbcp = db->hdb_dbc;
krb5_data key_data, data;
int code;
memset(&key, 0, sizeof(DBT));
memset(&value, 0, sizeof(DBT));
if ((*db->hdb_lock)(context, db, HDB_RLOCK))
return HDB_ERR_DB_INUSE;
code = (*dbcp->c_get)(dbcp, &key, &value, flag);
(*db->hdb_unlock)(context, db); /* XXX check value */
if (code == DB_NOTFOUND)
return HDB_ERR_NOENTRY;
if (code)
return code;
key_data.data = key.data;
key_data.length = key.size;
data.data = value.data;
data.length = value.size;
memset(entry, 0, sizeof(*entry));
if (hdb_value2entry(context, &data, &entry->entry))
return DB_seq(context, db, flags, entry, DB_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);
}
if (entry->entry.principal == NULL) {
entry->entry.principal = malloc(sizeof(*entry->entry.principal));
if (entry->entry.principal == NULL) {
hdb_free_entry (context, entry);
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
} else {
hdb_key2principal(context, &key_data, entry->entry.principal);
}
}
return 0;
}
static krb5_error_code
DB_nextkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
return DB_seq(context, db, flags, entry, R_NEXT);
}
static krb5_error_code
DB_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
return DB_seq(context, db, flags, entry, DB_FIRST);
}
