SmmCryptLib.c

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#include <PiSmm.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/SmmServicesTableLib.h>
#include <Protocol/SmmCrypto.h>
 
EDKII_SMM_CRYPTO_PROTOCOL  *mSmmCryptoProtocol = NULL;
 
VOID *
GetCryptoServices (
  VOID
  )
{
  return (VOID *)mSmmCryptoProtocol;
}
 
EFI_STATUS
EFIAPI
SmmCryptLibConstructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
  UINTN       Version;
 
  Status = gSmst->SmmLocateProtocol (
                    &gEdkiiSmmCryptoProtocolGuid,
                    NULL,
                    (VOID **)&mSmmCryptoProtocol
                    );
  if (EFI_ERROR (Status) || (mSmmCryptoProtocol == NULL)) {
    DEBUG ((DEBUG_ERROR, "[SmmCryptLib] Failed to locate Crypto SMM Protocol. Status = %r\n", Status));
    ASSERT_EFI_ERROR (Status);
    ASSERT (mSmmCryptoProtocol != NULL);
    mSmmCryptoProtocol = NULL;
    return EFI_NOT_FOUND;
  }
 
  Version = mSmmCryptoProtocol->GetVersion ();
  if (Version < EDKII_CRYPTO_VERSION) {
    DEBUG ((DEBUG_ERROR, "[SmmCryptLib] Crypto SMM Protocol unsupported version %d\n", Version));
    ASSERT (Version >= EDKII_CRYPTO_VERSION);
    mSmmCryptoProtocol = NULL;
    return EFI_NOT_FOUND;
  }
 
  return EFI_SUCCESS;
}