diff -up gpgme-1.23.2/src/engine.c.sast_fix2 gpgme-1.23.2/src/engine.c
--- gpgme-1.23.2/src/engine.c.sast_fix2	2024-08-05 17:31:46.790089148 +0200
+++ gpgme-1.23.2/src/engine.c	2024-08-05 17:34:55.788069948 +0200
@@ -73,7 +73,7 @@ static char *engine_minimal_version;
 static const char *
 engine_get_file_name (gpgme_protocol_t proto)
 {
-  if (proto > DIM (engine_ops))
+  if (proto >= DIM (engine_ops))
     return NULL;
 
   if (engine_ops[proto] && engine_ops[proto]->get_file_name)
@@ -103,7 +103,7 @@ engine_get_home_dir (gpgme_protocol_t pr
 static char *
 engine_get_version (gpgme_protocol_t proto, const char *file_name)
 {
-  if (proto > DIM (engine_ops))
+  if (proto >= DIM (engine_ops))
     return NULL;
 
   if (engine_ops[proto] && engine_ops[proto]->get_version)
@@ -118,7 +118,7 @@ engine_get_version (gpgme_protocol_t pro
 static const char *
 engine_get_req_version (gpgme_protocol_t proto)
 {
-  if (proto > DIM (engine_ops))
+  if (proto >= DIM (engine_ops))
     return NULL;
 
   if (engine_ops[proto] && engine_ops[proto]->get_req_version)
@@ -403,7 +403,7 @@ _gpgme_set_engine_info (gpgme_engine_inf
   char *new_version;
 
   /* FIXME: Use some PROTO_MAX definition.  */
-  if (proto > DIM (engine_ops))
+  if (proto >= DIM (engine_ops))
     return gpg_error (GPG_ERR_INV_VALUE);
 
   while (info && info->protocol != proto)