diff --git a/firmware/lib/tpm_lite/mocked_tlcl.c b/firmware/lib/tpm_lite/mocked_tlcl.c
index 2657cb6..627ed66 100644
--- a/firmware/lib/tpm_lite/mocked_tlcl.c
+++ b/firmware/lib/tpm_lite/mocked_tlcl.c
@@ -153,3 +153,16 @@
   Memset(data, '\x9', *size);
   return TPM_SUCCESS;
 }
+
+int TlclPacketSize(const uint8_t* packet)
+{
+  uint32_t size;
+  FromTpmUint32(packet + sizeof(uint16_t), &size);
+  return (int) size;
+}
+
+uint32_t TlclSendReceive(const uint8_t* request, uint8_t* response,
+                         int max_length)
+{
+  return TPM_SUCCESS;
+}