CryptoPei.c

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#include <PiPei.h>
#include <Library/PeiServicesLib.h>
#include <Library/DebugLib.h>
#include <Ppi/Crypto.h>
 
extern CONST EDKII_CRYPTO_PROTOCOL  mEdkiiCrypto;
 
CONST EFI_PEI_PPI_DESCRIPTOR  mEdkiiCryptoPpiList = {
  (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
  &gEdkiiCryptoPpiGuid,
  (EDKII_CRYPTO_PPI *)&mEdkiiCrypto
};
 
EFI_STATUS
EFIAPI
CryptoPeiEntry (
  IN       EFI_PEI_FILE_HANDLE  FileHandle,
  IN CONST EFI_PEI_SERVICES     **PeiServices
  )
{
  EFI_STATUS              Status;
  VOID                    *MemoryDiscoveredPpi;
  EDKII_CRYPTO_PPI        *EdkiiCryptoPpi;
  EFI_PEI_PPI_DESCRIPTOR  *EdkiiCryptoPpiDescriptor;
 
  //
  // Not all Open SSL services support XIP due to use of global variables.
  // Use gEfiPeiMemoryDiscoveredPpiGuid to detect Pre-Mem and Post-Mem and
  // always shadow this module in memory in Post-Mem.
  //
  Status = PeiServicesLocatePpi (
             &gEfiPeiMemoryDiscoveredPpiGuid,
             0,
             NULL,
             (VOID **)&MemoryDiscoveredPpi
             );
  if (Status == EFI_NOT_FOUND) {
    //
    // CryptoPei is dispatched before gEfiPeiMemoryDiscoveredPpiGuid
    //
    Status = PeiServicesRegisterForShadow (FileHandle);
    ASSERT_EFI_ERROR (Status);
    if (!EFI_ERROR (Status)) {
      //
      // First CryptoPpi installation. CryptoPei could come from memory or flash
      // it will be re-installed after gEfiPeiMemoryDiscoveredPpiGuid
      //
      DEBUG ((DEBUG_INFO, "CryptoPeiEntry: Install Pre-Memory Crypto PPI\n"));
      Status = PeiServicesInstallPpi (&mEdkiiCryptoPpiList);
      ASSERT_EFI_ERROR (Status);
    }
  } else if (Status == EFI_SUCCESS) {
    //
    // CryptoPei is dispatched after gEfiPeiMemoryDiscoveredPpiGuid
    //
    Status = PeiServicesLocatePpi (
               &gEdkiiCryptoPpiGuid,
               0,
               &EdkiiCryptoPpiDescriptor,
               (VOID **)&EdkiiCryptoPpi
               );
    if (!EFI_ERROR (Status)) {
      //
      // CryptoPei was also dispatched before gEfiPeiMemoryDiscoveredPpiGuid
      //
      DEBUG ((DEBUG_INFO, "CryptoPeiEntry: ReInstall Post-Memmory Crypto PPI\n"));
      Status = PeiServicesReInstallPpi (
                 EdkiiCryptoPpiDescriptor,
                 &mEdkiiCryptoPpiList
                 );
      ASSERT_EFI_ERROR (Status);
    } else {
      DEBUG ((DEBUG_INFO, "CryptoPeiEntry: Install Post-Memmory Crypto PPI\n"));
      Status = PeiServicesInstallPpi (&mEdkiiCryptoPpiList);
    }
  } else {
    ASSERT_EFI_ERROR (Status);
  }
 
  return Status;
}