DxeCryptLib.c

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#include <PiDxe.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/Crypto.h>
 
EDKII_CRYPTO_PROTOCOL  *mCryptoProtocol = NULL;
 
VOID *
GetCryptoServices (
  VOID
  )
{
  return (VOID *)mCryptoProtocol;
}
 
EFI_STATUS
EFIAPI
DxeCryptLibConstructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
  UINTN       Version;
 
  Status = gBS->LocateProtocol (
                  &gEdkiiCryptoProtocolGuid,
                  NULL,
                  (VOID **)&mCryptoProtocol
                  );
 
  if (EFI_ERROR (Status) || (mCryptoProtocol == NULL)) {
    DEBUG ((DEBUG_ERROR, "[DxeCryptLib] Failed to locate Crypto Protocol. Status = %r\n", Status));
    ASSERT_EFI_ERROR (Status);
    ASSERT (mCryptoProtocol != NULL);
    mCryptoProtocol = NULL;
    return EFI_NOT_FOUND;
  }
 
  Version = mCryptoProtocol->GetVersion ();
  if (Version < EDKII_CRYPTO_VERSION) {
    DEBUG ((DEBUG_ERROR, "[DxeCryptLib] Crypto Protocol unsupported version %d\n", Version));
    ASSERT (Version >= EDKII_CRYPTO_VERSION);
    mCryptoProtocol = NULL;
    return EFI_NOT_FOUND;
  }
 
  return EFI_SUCCESS;
}