1 files changed, 96 insertions, 0 deletions
diff --git a/CryptoPkg/Library/MbedTlsLib/CrtWrapper.c b/CryptoPkg/Library/MbedTlsLib/CrtWrapper.c
new file mode 100644
index 0000000000..04d2877e7d
--- /dev/null
+++ b/CryptoPkg/Library/MbedTlsLib/CrtWrapper.c
@@ -0,0 +1,96 @@
+/** @file
+  C Run-Time Libraries (CRT) Wrapper Implementation for MbedTLS-based
+  Cryptographic Library.
+
+Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <stdio.h>
+
+#include <Library/MemoryAllocationLib.h>
+
+int
+my_snprintf (
+  char        *str,
+  size_t      size,
+  const char  *format,
+  ...
+  )
+{
+  return 0;
+}
+
+//
+// Extra header to record the memory buffer size from malloc routine.
+//
+#define CRYPTMEM_HEAD_SIGNATURE  SIGNATURE_32('c','m','h','d')
+typedef struct {
+  UINT32    Signature;
+  UINT32    Reserved;
+  UINTN     Size;
+} CRYPTMEM_HEAD;
+
+#define CRYPTMEM_OVERHEAD  sizeof(CRYPTMEM_HEAD)
+
+//
+// -- Memory-Allocation Routines --
+//
+
+/* Allocates memory blocks */
+void *
+mbedtls_calloc (
+  size_t  num,
+  size_t  size
+  )
+{
+  CRYPTMEM_HEAD  *PoolHdr;
+  UINTN          NewSize;
+  VOID           *Data;
+
+  //
+  // Adjust the size by the buffer header overhead
+  //
+  NewSize = (UINTN)(size * num) + CRYPTMEM_OVERHEAD;
+
+  Data = AllocateZeroPool (NewSize);
+  if (Data != NULL) {
+    PoolHdr = (CRYPTMEM_HEAD *)Data;
+    //
+    // Record the memory brief information
+    //
+    PoolHdr->Signature = CRYPTMEM_HEAD_SIGNATURE;
+    PoolHdr->Size      = size;
+
+    return (VOID *)(PoolHdr + 1);
+  } else {
+    //
+    // The buffer allocation failed.
+    //
+    return NULL;
+  }
+}
+
+/* De-allocates or frees a memory block */
+void
+mbedtls_free (
+  void  *ptr
+  )
+{
+  CRYPTMEM_HEAD  *PoolHdr;
+
+  //
+  // In Standard C, free() handles a null pointer argument transparently. This
+  // is not true of FreePool() below, so protect it.
+  //
+  if (ptr != NULL) {
+    PoolHdr = (CRYPTMEM_HEAD *)ptr - 1;
+    ASSERT (PoolHdr->Signature == CRYPTMEM_HEAD_SIGNATURE);
+    FreePool (PoolHdr);
+  }
+}