CK_RV PKCS11_PAL_GetObjectValue()

in source/portable/os/freertos_winsim/core_pkcs11_pal.c [160:241]
64 lines of code
11 McCabe index (conditional complexity)

CK_RV PKCS11_PAL_GetObjectValue( CK_OBJECT_HANDLE xHandle,
                                 CK_BYTE_PTR * ppucData,
                                 CK_ULONG_PTR pulDataSize,
                                 CK_BBOOL * pIsPrivate )
{
    CK_RV ulReturn = CKR_KEY_HANDLE_INVALID;
    uint32_t ulDriverReturn = 0;
    HANDLE hFile = INVALID_HANDLE_VALUE;
    uint32_t ulSize = 0;
    char * pcFileName = NULL;


    ulReturn = PAL_UTILS_HandleToFilename( xHandle,
                                           &pcFileName,
                                           pIsPrivate );

    if( ( pcFileName != NULL ) && ( pdTRUE == prvFileExists( pcFileName ) ) )
    {
        /* Open the file. */
        hFile = CreateFileA( pcFileName,
                             GENERIC_READ,
                             FILE_SHARE_READ,
                             NULL,
                             OPEN_EXISTING,
                             FILE_ATTRIBUTE_NORMAL,
                             NULL );

        if( INVALID_HANDLE_VALUE == hFile )
        {
            ulDriverReturn = GetLastError();
            LogError( ( "Unable to open file %d \r\n", ulDriverReturn ) );
            ulReturn = CKR_FUNCTION_FAILED;
        }

        if( 0 == ulReturn )
        {
            /* Get the file size. */
            *pulDataSize = GetFileSize( hFile, ( LPDWORD ) ( &ulSize ) );

            /* Create a buffer. */
            *ppucData = pvPortMalloc( *pulDataSize );

            if( NULL == *ppucData )
            {
                ulReturn = CKR_HOST_MEMORY;
            }
        }

        /* Read the file. */
        if( 0 == ulReturn )
        {
            if( FALSE == ReadFile( hFile,
                                   *ppucData,
                                   *pulDataSize,
                                   ( LPDWORD ) ( &ulSize ),
                                   NULL ) )
            {
                LogError( ( "Unable to read file \r\n" ) );
                ulReturn = CKR_FUNCTION_FAILED;
            }
        }

        /* Confirm the amount of data read. */
        if( 0 == ulReturn )
        {
            ulReturn = CKR_OK;

            if( ulSize != *pulDataSize )
            {
                ulReturn = CKR_FUNCTION_FAILED;
            }
        }

        /* Clean up. */
        if( INVALID_HANDLE_VALUE != hFile )
        {
            CloseHandle( hFile );
        }
    }

    return ulReturn;
}