1 files changed, 20 insertions, 0 deletions
diff --git a/tools/imagetool.c b/tools/imagetool.c
index 08d191d9f8..855a096d0a 100644
--- a/tools/imagetool.c
+++ b/tools/imagetool.c
@@ -115,3 +115,23 @@ int imagetool_get_filesize(struct image_tool_params *params, const char *fname)
 
 	return sbuf.st_size;
 }
+
+time_t imagetool_get_source_date(
+	 struct image_tool_params *params,
+	 time_t fallback)
+{
+	char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+
+	if (source_date_epoch == NULL)
+		return fallback;
+
+	time_t time = (time_t) strtol(source_date_epoch, NULL, 10);
+
+	if (gmtime(&time) == NULL) {
+		fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n",
+			params->cmdname);
+		time = 0;
+	}
+
+	return time;
+}