/** @file
  PKCS#7 SignedData Verification Wrapper Implementation which does not provide
  real capabilities.

Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include "InternalCryptLib.h"

/**
  Get the signer's certificates from PKCS#7 signed data as described in "PKCS #7:
  Cryptographic Message Syntax Standard". The input signed data could be wrapped
  in a ContentInfo structure.

  Return FALSE to indicate this interface is not supported.

  @param[in]  P7Data       Pointer to the PKCS#7 message to verify.
  @param[in]  P7Length     Length of the PKCS#7 message in bytes.
  @param[out] CertStack    Pointer to Signer's certificates retrieved from P7Data.
                           It's caller's responsibility to free the buffer with
                           Pkcs7FreeSigners().
                           This data structure is EFI_CERT_STACK type.
  @param[out] StackLength  Length of signer's certificates in bytes.
  @param[out] TrustedCert  Pointer to a trusted certificate from Signer's certificates.
                           It's caller's responsibility to free the buffer with
                           Pkcs7FreeSigners().
  @param[out] CertLength   Length of the trusted certificate in bytes.

  @retval FALSE  This interface is not supported.

**/
BOOLEAN
EFIAPI
Pkcs7GetSigners (
  IN  CONST UINT8  *P7Data,
  IN  UINTN        P7Length,
  OUT UINT8        **CertStack,
  OUT UINTN        *StackLength,
  OUT UINT8        **TrustedCert,
  OUT UINTN        *CertLength
  )
{
  ASSERT (FALSE);
  return FALSE;
}

/**
  Wrap function to use free() to free allocated memory for certificates.

  If the interface is not supported, then ASSERT().
  
  @param[in]  Certs        Pointer to the certificates to be freed.

**/
VOID
EFIAPI
Pkcs7FreeSigners (
  IN  UINT8        *Certs
  )
{
  ASSERT (FALSE);
}

/**
  Retrieves all embedded certificates from PKCS#7 signed data as described in "PKCS #7:
  Cryptographic Message Syntax Standard", and outputs two certificate lists chained and
  unchained to the signer's certificates.
  The input signed data could be wrapped in a ContentInfo structure.

  @param[in]  P7Data            Pointer to the PKCS#7 message.
  @param[in]  P7Length          Length of the PKCS#7 message in bytes.
  @param[out] SignerChainCerts  Pointer to the certificates list chained to signer's
                                certificate. It's caller's responsibility to free the buffer
                                with Pkcs7FreeSigners().
                                This data structure is EFI_CERT_STACK type.
  @param[out] ChainLength       Length of the chained certificates list buffer in bytes.
  @param[out] UnchainCerts      Pointer to the unchained certificates lists. It's caller's
                                responsibility to free the buffer with Pkcs7FreeSigners().
                                This data structure is EFI_CERT_STACK type.
  @param[out] UnchainLength     Length of the unchained certificates list buffer in bytes.

  @retval  TRUE         The operation is finished successfully.
  @retval  FALSE        Error occurs during the operation.

**/
BOOLEAN
EFIAPI
Pkcs7GetCertificatesList (
  IN  CONST UINT8  *P7Data,
  IN  UINTN        P7Length,
  OUT UINT8        **SignerChainCerts,
  OUT UINTN        *ChainLength,
  OUT UINT8        **UnchainCerts,
  OUT UINTN        *UnchainLength
  )
{
  ASSERT (FALSE);
  return FALSE;
}

/**
  Verifies the validity of a PKCS#7 signed data as described in "PKCS #7:
  Cryptographic Message Syntax Standard". The input signed data could be wrapped
  in a ContentInfo structure.

  Return FALSE to indicate this interface is not supported.

  @param[in]  P7Data       Pointer to the PKCS#7 message to verify.
  @param[in]  P7Length     Length of the PKCS#7 message in bytes.
  @param[in]  TrustedCert  Pointer to a trusted/root certificate encoded in DER, which
                           is used for certificate chain verification.
  @param[in]  CertLength   Length of the trusted certificate in bytes.
  @param[in]  InData       Pointer to the content to be verified.
  @param[in]  DataLength   Length of InData in bytes.

  @retval FALSE  This interface is not supported.

**/
BOOLEAN
EFIAPI
Pkcs7Verify (
  IN  CONST UINT8  *P7Data,
  IN  UINTN        P7Length,
  IN  CONST UINT8  *TrustedCert,
  IN  UINTN        CertLength,
  IN  CONST UINT8  *InData,
  IN  UINTN        DataLength
  )
{
  ASSERT (FALSE);
  return FALSE;
}

/**
  Extracts the attached content from a PKCS#7 signed data if existed. The input signed
  data could be wrapped in a ContentInfo structure.

  Return FALSE to indicate this interface is not supported.

  @param[in]   P7Data       Pointer to the PKCS#7 signed data to process.
  @param[in]   P7Length     Length of the PKCS#7 signed data in bytes.
  @param[out]  Content      Pointer to the extracted content from the PKCS#7 signedData.
                            It's caller's responsibility to free the buffer with FreePool().
  @param[out]  ContentSize  The size of the extracted content in bytes.

  @retval     TRUE          The P7Data was correctly formatted for processing.
  @retval     FALSE         The P7Data was not correctly formatted for processing.

**/
BOOLEAN
EFIAPI
Pkcs7GetAttachedContent (
  IN  CONST UINT8  *P7Data,
  IN  UINTN        P7Length,
  OUT VOID         **Content,
  OUT UINTN        *ContentSize
  )
{
  ASSERT (FALSE);
  return FALSE;
}