text: /*
   * corePKCS11 V3.0.1
   * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
   * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
   * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * http://aws.amazon.com/freertos
   * http://www.FreeRTOS.org
   */
  
  /**
   * @file C_Verify_harness.c
   * @brief Implements the proof harness for C_Verify function.
   */
  
  #include <stdbool.h>
  #include <stddef.h>
  #include "mbedtls/sha256.h"
  #include "mbedtls/pk.h"
  #include "core_pkcs11_config.h"
  #include "core_pkcs11.h"
  #include "core_pki_utils.h"
  
  /* Internal struct for corePKCS11 mbed TLS implementation, but we don't really care what it contains
   * in this proof.
   *
   * It is just copied over from "core_pkcs11_mbedtls.c" so the structure is correct.
   */
  typedef struct P11Session
  {
      CK_ULONG ulState;
      CK_BBOOL xOpened;
      CK_MECHANISM_TYPE xOperationDigestMechanism;
      CK_BYTE * pxFindObjectLabel;
      CK_ULONG xFindObjectLabelLen;
      CK_MECHANISM_TYPE xOperationVerifyMechanism;
      mbedtls_threading_mutex_t xVerifyMutex;
      CK_OBJECT_HANDLE xVerifyKeyHandle;
      mbedtls_pk_context xVerifyKey;
      CK_MECHANISM_TYPE xOperationSignMechanism;
      mbedtls_threading_mutex_t xSignMutex;
      CK_OBJECT_HANDLE xSignKeyHandle;
      mbedtls_pk_context xSignKey;
      mbedtls_sha256_context xSHA256Context;
  } P11Session_t;
  
  
  CK_RV __CPROVER_file_local_core_pkcs11_mbedtls_c_prvCheckValidSessionAndModule( P11Session_t * pxSession )
  {
      CK_MECHANISM_TYPE xOp;
      CK_RV xResult;
  
      __CPROVER_assert( pxSession != NULL, "pxSession was NULL." );
  
      /* The verify key just has to be not NULL for the proof to progress. */
      pxSession->xVerifyKey.pk_ctx = &xOp;
      pxSession->xOperationVerifyMechanism = xOp;
      return xResult;
  }
  
  CK_BBOOL __CPROVER_file_local_core_pkcs11_mbedtls_c_prvOperationActive( const P11Session_t * pxSession )
  {
      CK_BBOOL xBool;
  
      __CPROVER_assert( pxSession != NULL, "pxSession was NULL." );
      return xBool;
  }
  
  void __CPROVER_file_local_core_pkcs11_mbedtls_c_prvFindObjectInListByHandle( CK_OBJECT_HANDLE xAppHandle,
                                                                               CK_OBJECT_HANDLE_PTR pxPalHandle,
                                                                               CK_BYTE_PTR * ppcLabel,
                                                                               CK_ULONG_PTR pxLabelLength )
  {
      CK_OBJECT_HANDLE handle;
  
      __CPROVER_assert( pxPalHandle != NULL, "ppcLabel was NULL." );
      __CPROVER_assert( ppcLabel != NULL, "ppcLabel was NULL." );
      __CPROVER_assert( pxLabelLength != NULL, "ppcLabel was NULL." );
  
      __CPROVER_assume( handle < MAX_OBJECT_NUM );
      *pxPalHandle = handle;
  }
  
  void harness()
  {
      CK_SESSION_HANDLE xSession;
      CK_MECHANISM xMechanism;
      CK_ULONG ulDataLen;
      CK_ULONG ulSignatureLen;
  
      CK_BYTE_PTR pData = malloc( sizeof( CK_BYTE ) * ulDataLen );
      CK_BYTE_PTR pSignature = malloc( sizeof( CK_BYTE ) * ulSignatureLen );
  
      __CPROVER_assume( ( xSession > CK_INVALID_HANDLE ) && ( xSession <= pkcs11configMAX_SESSIONS ) );
      ( void ) C_Verify( xSession, pData, ulDataLen, pSignature, ulSignatureLen );
  }
  