undefined4 RTMPSoftDecryptWEP(undefined4 param_1,int param_2,byte *param_3,ushort *param_4)

{

  byte bVar1;

  ushort uVar2;

  uint uVar3;

  char *pcVar4;

  uint uVar5;

  int local_20;

  uint local_1c [2];

  local_20 = 0;

  os_alloc_mem(0,&local_20,0x108);

  if (local_20 == 0) {

    if (RTDebugLevel == 0) {

      return 0;

    }

    pcVar4 = "%s: ARC4_CTX Allocate memory fail!!!\n";

  }

  else {

    if (*(char *)(param_2 + 0x41) != '\0') {

      RTMPInitWepEngine(param_3,param_2);

      uVar2 = *param_4;

      ARC4_Compute(local_20,param_3 + 4,uVar2 - 4,param_3);

      memmove(local_1c,param_3 + (ushort)(uVar2 - 8),4)   //possible issue identified - semgrep

      uVar3 = 0xffffffff;

      for (uVar5 = 0; (ushort)(uVar2 - 8) != uVar5; uVar5 = uVar5 + 1) {

        bVar1 = *param_3;

        param_3 = param_3 + 1;

        uVar3 = *(uint *)(FCSTAB_32 + ((uVar3 ^ bVar1) & 0xff) * 4) ^ uVar3 >> 8;

      }

      if (~uVar3 != local_1c[0]) {

        if (RTDebugLevel == 0) {

          return 0;

        }

        printk("! WEP Data CRC Error !\n");

        return 0;

      }

      *param_4 = uVar2 - 8;

      if (local_20 == 0) {

        return 1;

      }

      os_free_mem(0);

      return 1;

    }

    if (RTDebugLevel == 0) {

      return 0;

    }

    pcVar4 = "%s : The key is not available !\n";

  }

  printk(pcVar4,"RTMPSoftDecryptWEP");

  return 0;

}