[PATCH] Fix segfault when failing to import keys

[Allan McRae]

Avoid a segfault when a search of the keyserver returns that the
key is found but returns no primary IDs.  We are then likely going
to fail the import, but attempt anyway because no-one know what
a keyserver will do!

Fixes FS#73534.

Signed-off-by: Allan McRae <allan at archlinux.org>
---
 lib/libalpm/signing.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/lib/libalpm/signing.c b/lib/libalpm/signing.c
index 0e022624..8a7fd87c 100644
--- a/lib/libalpm/signing.c
+++ b/lib/libalpm/signing.c
@@ -359,14 +359,18 @@ static int key_search_keyserver(alpm_handle_t *handle, const char *fpr,
 	} else {
 		pgpkey->fingerprint = key->subkeys->keyid;
 	}
-	pgpkey->uid = key->uids->uid;
-	pgpkey->name = key->uids->name;
-	pgpkey->email = key->uids->email;
+
+	/* we are probably going to fail importing, but continue anyway... */
+	if(key->uids != NULL) {
+		pgpkey->uid = key->uids->uid;
+		pgpkey->name = key->uids->name;
+		pgpkey->email = key->uids->email;
+	}
+
 	pgpkey->created = key->subkeys->timestamp;
 	pgpkey->expires = key->subkeys->expires;
 	pgpkey->length = key->subkeys->length;
 	pgpkey->revoked = key->subkeys->revoked;
-
 	/* Initialize with '?', this is overwritten unless public key
 	 * algorithm is unknown. */
 	pgpkey->pubkey_algo = '?';
@@ -535,7 +539,7 @@ int _alpm_key_import(alpm_handle_t *handle, const char *uid, const char *fpr)
 					ret = 0;
 				} else {
 					_alpm_log(handle, ALPM_LOG_ERROR,
-							_("key \"%s\" could not be imported\n"), fetch_key.uid);
+							_("key \"%s\" could not be imported\n"), fpr);
 				}
 			} else {
 				_alpm_log(handle, ALPM_LOG_ERROR,
-- 
2.35.1