detect: fix some -Wshorten-64-to-32 warnings

Ticket: #6186

src/detect-engine.c

@@ -3487,9 +3487,10 @@ static uint32_t DetectKeywordCtxHashFunc(HashListTable *ht, void *data, uint16_t
 {
     DetectEngineThreadKeywordCtxItem *ctx = data;
     const char *name = ctx->name;
-    uint64_t hash = StringHashDjb2((const uint8_t *)name, strlen(name)) + (ptrdiff_t)ctx->data;
+    uint64_t hash =
+            StringHashDjb2((const uint8_t *)name, (uint32_t)strlen(name)) + (ptrdiff_t)ctx->data;
     hash %= ht->array_size;
-    return hash;
+    return (uint32_t)hash;
 }
 
 static char DetectKeywordCtxCompareFunc(void *data1, uint16_t len1, void *data2, uint16_t len2)

src/detect-ftp-reply.c

@@ -75,7 +75,7 @@ static bool DetectFTPReplyGetData(DetectEngineThreadCtx *_det_ctx, const void *t
             DEBUG_VALIDATE_BUG_ON(wrapper->response == NULL);
             if (index == count) {
                 *buffer = (const uint8_t *)wrapper->response->response;
-                *buffer_len = wrapper->response->length;
+                *buffer_len = (uint32_t)wrapper->response->length;
                 return true;
             }
             count++;

src/detect-http-header.c

@@ -462,7 +462,7 @@ static int g_response_header_thread_id = 0;
 
 typedef struct HttpMultiBufItem {
     uint8_t *buffer;
-    size_t len;
+    uint32_t len;
 } HttpMultiBufItem;
 
 typedef struct HttpMultiBufHeaderThreadData {
@@ -539,9 +539,9 @@ static bool GetHttp1HeaderData(DetectEngineThreadCtx *det_ctx, const void *txv,
         }
         for (size_t i = 0; i < no_of_headers; i++) {
             const htp_header_t *h = htp_headers_get_index(headers, i);
-            size_t size1 = htp_header_name_len(h);
-            size_t size2 = htp_header_value_len(h);
-            size_t size = size1 + size2 + 2;
+            uint32_t size1 = (uint32_t)htp_header_name_len(h);
+            uint32_t size2 = (uint32_t)htp_header_value_len(h);
+            uint32_t size = size1 + size2 + 2;
             if (hdr_td->items[i].len < size) {
                 // Use realloc, as this pointer is not freed until HttpMultiBufHeaderThreadDataFree
                 void *tmp = SCRealloc(hdr_td->items[i].buffer, size);