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-rw-r--r--lib/libalpm/be_sync.c56
1 files changed, 55 insertions, 1 deletions
diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c
index e5fc6a70..2cf90544 100644
--- a/lib/libalpm/be_sync.c
+++ b/lib/libalpm/be_sync.c
@@ -20,7 +20,9 @@
#include "config.h"
+#include <errno.h>
#include <sys/stat.h>
+#include <unistd.h>
/* libarchive */
#include <archive.h>
@@ -65,6 +67,37 @@ static char *get_sync_dir(pmhandle_t *handle)
return syncpath;
}
+static int sync_db_validate(pmdb_t *db)
+{
+ /* this takes into account the default verification level if UNKNOWN
+ * was assigned to this db */
+ pgp_verify_t check_sig = _alpm_db_get_sigverify_level(db);
+
+ if(check_sig != PM_PGP_VERIFY_NEVER) {
+ int ret;
+ const char *dbpath = _alpm_db_path(db);
+ if(!dbpath) {
+ /* pm_errno set in _alpm_db_path() */
+ return -1;
+ }
+
+ /* we can skip any validation if the database doesn't exist */
+ if(access(dbpath, R_OK) != 0 && errno == ENOENT) {
+ return 0;
+ }
+
+ _alpm_log(db->handle, PM_LOG_DEBUG, "checking signature for %s\n",
+ db->treename);
+ ret = _alpm_gpgme_checksig(db->handle, dbpath, NULL);
+ if((check_sig == PM_PGP_VERIFY_ALWAYS && ret != 0) ||
+ (check_sig == PM_PGP_VERIFY_OPTIONAL && ret == 1)) {
+ RET_ERR(db->handle, PM_ERR_SIG_INVALID, -1);
+ }
+ }
+
+ return 0;
+}
+
/** Update a package database
*
* An update of the package database \a db will be attempted. Unless
@@ -144,6 +177,15 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
if(ret == 0 && (check_sig == PM_PGP_VERIFY_ALWAYS ||
check_sig == PM_PGP_VERIFY_OPTIONAL)) {
+ /* an existing sig file is no good at this point */
+ char *sigpath = _alpm_db_sig_path(db);
+ if(!sigpath) {
+ ret = -1;
+ break;
+ }
+ unlink(sigpath);
+ free(sigpath);
+
int errors_ok = (check_sig == PM_PGP_VERIFY_OPTIONAL);
/* if we downloaded a DB, we want the .sig from the same server */
snprintf(fileurl, len, "%s/%s.db.sig", server, db->treename);
@@ -173,6 +215,11 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
/* Cache needs to be rebuilt */
_alpm_db_free_pkgcache(db);
+ if(sync_db_validate(db)) {
+ /* pm_errno should be set */
+ ret = -1;
+ }
+
cleanup:
free(syncpath);
@@ -523,7 +570,8 @@ struct db_operations sync_db_ops = {
.version = sync_db_version,
};
-pmdb_t *_alpm_db_register_sync(pmhandle_t *handle, const char *treename)
+pmdb_t *_alpm_db_register_sync(pmhandle_t *handle, const char *treename,
+ pgp_verify_t level)
{
pmdb_t *db;
@@ -535,6 +583,12 @@ pmdb_t *_alpm_db_register_sync(pmhandle_t *handle, const char *treename)
}
db->ops = &sync_db_ops;
db->handle = handle;
+ db->pgp_verify = level;
+
+ if(sync_db_validate(db)) {
+ _alpm_db_free(db);
+ return NULL;
+ }
handle->dbs_sync = alpm_list_add(handle->dbs_sync, db);
return db;