gpgsm: keybox problem of KEYBOX_FLAG_CREATED_AT
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	• gniibe
	Thu, Apr 23, 4:09 AM

Description

I found a mistake for the calculation of KEYBOX_FLAG_CREATED_AT:

diff --git a/kbx/keybox-search.c b/kbx/keybox-search.c
index 6fb99cac6..0b1da0a24 100644
--- a/kbx/keybox-search.c
+++ b/kbx/keybox-search.c
@@ -163,7 +163,7 @@ _keybox_get_flag_location (const unsigned char *buffer, size_t length,
           break;
         case KEYBOX_FLAG_CREATED_AT:
           *flag_size = 4;
-          *flag_off += 1+2+4+4+4;
+          *flag_off += 1+1+2+4+4;
           break;
         case KEYBOX_FLAG_SIG_INFO:
           *flag_size = siginfolen * nsigs;

The impact of this mistake is only for gpgsm which uses ephemeral blob, because access with KEYBOX_FLAG_CREATED_AT is only with ephemeral blob.
When compressing the keybox file, ephemeral blob might be removed wrongly or might be skipped wrongly.

It's not severe issue.