0

我正在尝试使用 DiagStartGenerateKeyFromSeed 从 ECU 发送的种子生成密钥，但我得到的结果是“缓冲区太小”

on diagResponse ECU.SecurityAccess_Process
{
   long result ;
   result = diagGetParameterRaw (this, "securitySeed", gSeedArray, elcount(gSeedArray));
   if (result == 0 )
   {
      write("Seed is (hex) %X %X %X",gSeedArray[0],gSeedArray[1],gSeedArray[2]);
      result=DiagStartGenerateKeyFromSeed("ECU",gSeedArray,elcount(gSeedArray),1,"Common","");
      if (result == 0)
      {
         write(" Key computation for security Level 1 was started  ") ;
      }
      else
      {
         write("Error code %ld during key calculation",result);
         if(result==-84)
         write("invalid security level");
         if(result==-86)
         write("buffer too small");
      }

  }
  else
     {
       write("Could not retrieve parameter");
  }
 }



Diag_GenerateKeyResult( long result, BYTE computedKey[])
{
 
  int i;
  long ret;
  char keyBuffer[3], stringBuffer[10];

  if(result==0) // if key has been calculated
  {
      write("callback started ");
     // To output the key in one line, a composite string has to be build
     snprintf(stringBuffer, elCount(stringBuffer),""); // Clear the string buffer
     strncat(stringBuffer, "Key is (hex): ",
     elCount(stringBuffer)); // Begin to build composite string
     for(i=0;i<elCount(computedKey);i++)
     {
         snprintf(keyBuffer, elCount(keyBuffer), "%02X ",
         computedKey[i]); // Print current key byte into key buffer
         strncat(stringBuffer, keyBuffer,
         elCount(stringBuffer)); // Add current key byte to the string buffer
     }
     write(stringBuffer); // Output the string buffer (the key) in one line
  }
  else
   {
     write("Error code %ld during key calculation",result);
     if(result==-84)
     write("invalid security level");
     if(result==-86)
     write("buffer too small");
   }


 }

如果一旦 ECU 发送种子回调函数 _Diag_GenerateKeyResult 事件 OndiagResponse 处于活动状态，则 DiagStartGenerateKeyFromSeed 正常工作我得到“安全级别 1 的密钥计算已启动”

4

0 回答 0