diff --git a/components/common/mbedtls/mbedtls_utils.c b/components/common/mbedtls/mbedtls_utils.c
new file mode 100644
index 0000000..e7c97e9
--- /dev/null
+++ b/components/common/mbedtls/mbedtls_utils.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2024, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <string.h>
+#include "mbedtls_utils.h"
+
+/*
+ * Official value: http://www.oid-info.com/get/2.5.4.3
+ * Hex converter: https://misc.daniel-marschall.de/asn.1/oid-converter/online.php
+ */
+#define CN_OID_TAG (0x06)
+#define CN_OID_LEN (0x03)
+#define CN_OID_VAL {0x55, 0x04, 0x03}
+
+/* Searches for the common name field in an mbedtls_asn1_named_data object */
+const mbedtls_asn1_buf* findCommonName(const mbedtls_asn1_named_data *name)
+{
+	static const uint8_t cn_oid_values[CN_OID_LEN] = CN_OID_VAL;
+
+	while (name)
+	{
+		if (name->oid.tag == CN_OID_TAG && name->oid.len == CN_OID_LEN) {
+			if (name->oid.p != NULL) {
+				if (!memcmp(name->oid.p, cn_oid_values, (size_t) CN_OID_LEN))
+					return &name->val;
+			}
+		}
+
+		name = name->next;
+	}
+
+	return NULL;
+}