update: use U32_AT

diff --git a/src/misc/update_crypto.c b/src/misc/update_crypto.c
index 417b3ec821420497d4cdadd8f5d23ae6b382207b..c935b0320052e8173260d8d58be55fa5a2be1439 100644 (file)
--- a/src/misc/update_crypto.c
+++ b/src/misc/update_crypto.c
@@ -257,10 +257,8 @@ static size_t parse_signature_v4_packet( signature_packet_t *p_sig,
         {
             if( p + 4 > max_pos )
                 return 0;
-            i_subpacket_len = *++p << 24;
-            i_subpacket_len += *++p << 16;
-            i_subpacket_len += *++p << 8;
-            i_subpacket_len += *++p;
+            i_subpacket_len = U32_AT(p);
+            p += 4;
         }
 
         if( *p == ISSUER_SUBPACKET )