OpenCoreVault.c

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#include <Library/OcMainLib.h>
 
typedef struct {
  OC_RSA_PUBLIC_KEY_HDR    Hdr;
  UINT64                   Data[(2 * (2048 / OC_CHAR_BIT)) / sizeof (UINT64)];
} OC_RSA_PUBLIC_KEY_2048;
 
typedef struct {
  CHAR8                     StartMagic[16];
  OC_RSA_PUBLIC_KEY_2048    VaultKey;
  CHAR8                     EndMagic[16];
} OC_BUILTIN_VAULT_KEY;
 
BASE_ALIGNAS (16)
STATIC
OC_BUILTIN_VAULT_KEY
mOpenCoreVaultKey = {
  .StartMagic = { '=', 'B', 'E', 'G', 'I', 'N', ' ', 'O', 'C', ' ', 'V', 'A', 'U', 'L', 'T', '=' },
  .EndMagic   = { '=', '=', 'E', 'N', 'D', ' ', 'O', 'C', ' ', 'V', 'A', 'U', 'L', 'T', '=', '=' }
};
 
OC_RSA_PUBLIC_KEY *
OcGetVaultKey (
  VOID
  )
{
  UINT32   Index;
  BOOLEAN  AllZero;
 
  STATIC_ASSERT (
    sizeof (OC_RSA_PUBLIC_KEY_2048) == 528,
    "sizeof(OC_RSA_PUBLIC_KEY_2048)"
    );
  STATIC_ASSERT (
    sizeof (OC_BUILTIN_VAULT_KEY) == sizeof (OC_RSA_PUBLIC_KEY_2048) + 32,
    "sizeof(OC_BUILTIN_VAULT_KEY)"
    );
 
  //
  // TODO: Perhaps try to get the key from firmware too?
  //
 
  AllZero = TRUE;
  for (Index = 0; Index < sizeof (OC_RSA_PUBLIC_KEY); ++Index) {
    if (((UINT8 *)&mOpenCoreVaultKey.VaultKey)[Index] != 0) {
      AllZero = FALSE;
      break;
    }
  }
 
  if (!AllZero) {
    return (OC_RSA_PUBLIC_KEY *)&mOpenCoreVaultKey.VaultKey;
  }
 
  return NULL;
}