void RT_HMAC_SHA256(void *param_1,uint param_2,undefined4 param_3,undefined4 param_4,void *param_5,

                   size_t param_6)

{

  byte bVar1;

  byte *pbVar2;

  byte *pbVar3;

  undefined1 auStack_168 [32];

  byte local_148 [64];

  byte abStack_108 [112];

  undefined1 auStack_98 [116];

  memset(abStack_108,0,0x70)   //possible issue identified - semgrep

  memset(auStack_98,0,0x70)   //possible issue identified - semgrep

  memset(local_148,0,0x40)   //possible issue identified - semgrep

  if (param_2 < 0x41) {

    memmove(local_148,param_1,param_2)   //possible issue identified - semgrep

  }

  else {

    RT_SHA256(param_1,param_2,local_148);

  }

  pbVar3 = local_148;

  pbVar2 = pbVar3;

  bVar1 = local_148[0];

  while( true ) {

    *pbVar2 = bVar1 ^ 0x36;

    pbVar2 = pbVar2 + 1;

    if (pbVar2 == abStack_108) break;

    bVar1 = *pbVar2;

  }

  RT_SHA256_Init(pbVar2);

  RT_SHA256_Append(pbVar2,pbVar3,0x40);

  RT_SHA256_Append(pbVar2,param_3,param_4);

  RT_SHA256_End(pbVar2,auStack_168);

  while( true ) {

    *pbVar3 = local_148[0] ^ 0x6a;

    pbVar3 = pbVar3 + 1;

    if (pbVar3 == pbVar2) break;

    local_148[0] = *pbVar3;

  }

  RT_SHA256_Init(auStack_98);

  RT_SHA256_Append(auStack_98,local_148,0x40);

  RT_SHA256_Append(auStack_98,auStack_168,0x20);

  RT_SHA256_End(auStack_98,auStack_168);

  if (0x20 < param_6) {

    param_6 = 0x20   //possible issue identified - semgrep

  }

  memmove(param_5,auStack_168,param_6)   //possible issue identified - semgrep

  return;

}