undefined4

AES_CCM_Decrypt(int param_1,uint param_2,undefined4 param_3,int param_4,int param_5,uint param_6,

               undefined4 param_7,undefined4 param_8,size_t param_9,int param_10,uint *param_11)

{

  byte bVar1;

  bool bVar2;

  undefined4 uVar3;

  uint uVar4;

  byte *pbVar5;

  int iVar6;

  byte *pbVar7;

  byte *pbVar8;

  uint uVar9;

  uint uVar10;

  undefined4 local_70;

  undefined1 auStack_6c [16];

  byte local_5c [16];

  byte local_4c [15];

  char local_3d;

  byte local_3c [20];

  local_70 = 0;

  if (param_4 == 0x10) {

    if (param_6 - 7 < 7) {

      if (((((param_9 == 4) || (param_9 == 6)) || (param_9 == 8)) ||

          ((param_9 == 10 || (param_9 == 0xc)))) || ((param_9 == 0xe || (param_9 == 0x10)))) {

        uVar10 = param_2 - param_9;

        if (*param_11 < uVar10) {

          uVar3 = 0xfffffffc;

          if (RTDebugLevel != 0) {

            printk("AES_CCM_Decrypt: The PlainTextLength is not enough.\n");

            uVar3 = 0xfffffffc;

          }

        }

        else {

          memset(local_4c,0,0x10)   //possible issue identified - semgrep

          local_4c[0] = 0xeU - (char)param_6 | local_4c[0];

          uVar4 = 0;

          while( true ) {

            bVar2 = param_6 <= uVar4;

            uVar4 = uVar4 + 1;

            if (bVar2) break;

            local_4c[uVar4] = *(byte *)(param_5 + uVar4 + -1);

          }

          local_70 = 0x10;

          RT_AES_Encrypt(local_4c,0x10,param_3,0x10,local_3c,&local_70);

          pbVar7 = (byte *)(param_1 + uVar10);

          iVar6 = 0;

          uVar4 = uVar10;

          while( true ) {

            bVar2 = param_2 <= uVar4;

            pbVar5 = local_3c + iVar6;

            pbVar8 = local_5c + iVar6;

            uVar4 = uVar4 + 1;

            iVar6 = iVar6 + 1;

            if (bVar2) break;

            bVar1 = *pbVar7;

            pbVar7 = pbVar7 + 1;

            *pbVar8 = *pbVar5 ^ bVar1;

          }

          for (uVar4 = 0; uVar4 < uVar10; uVar4 = uVar4 + uVar9) {

            local_3d = local_3d + '\x01';

            local_70 = 0x10;

            RT_AES_Encrypt(local_4c,0x10,param_3,0x10,local_3c,&local_70);

            uVar9 = 0x10;

            if (uVar10 - uVar4 < 0x11) {

              uVar9 = uVar10 - uVar4;

            }

            pbVar8 = (byte *)(param_1 + uVar4);

            pbVar5 = (byte *)(param_10 + uVar4);

            for (pbVar7 = local_3c; pbVar7 != local_3c + uVar9; pbVar7 = pbVar7 + 1) {

              bVar1 = *pbVar8;

              pbVar8 = pbVar8 + 1;

              *pbVar5 = *pbVar7 ^ bVar1;

              pbVar5 = pbVar5 + 1;

            }

          }

          *param_11 = uVar10;

          AES_CCM_MAC(param_10,uVar10,param_3,0x10,param_5,param_6,param_7,param_8,param_9,

                      auStack_6c);

          iVar6 = memcmp(local_5c,auStack_6c,param_9)   //possible issue identified - semgrep

          uVar3 = 0;

          if ((iVar6 != 0) && (uVar3 = 0xfffffffb, RTDebugLevel != 0)) {

            printk("AES_CCM_Decrypt: The MIC does not match.\n");

            uVar3 = 0xfffffffb;

          }

        }

      }

      else {

        uVar3 = 0xfffffffd;

        if (RTDebugLevel != 0) {

          printk("AES_CCM_Decrypt: The MAC length  must be 4, 6, 8, 10, 12, 14, or 16 bytes\n");

          uVar3 = 0xfffffffd;

        }

      }

    }

    else {

      uVar3 = 0xfffffffe;

      if (RTDebugLevel != 0) {

        printk("AES_CCM_Decrypt: A valid nonce length is 7-13 bytes\n");

        uVar3 = 0xfffffffe;

      }

    }

  }

  else {

    uVar3 = 0xffffffff;

    if (RTDebugLevel != 0) {

      printk("AES_CCM_Decrypt: The key length must be %d bytes\n",0x10);

      uVar3 = 0xffffffff;

    }

  }

  return uVar3;

}