void RT_SHA1_Append(int param_1,int param_2,int param_3)

{

  int iVar1;

  uint uVar2;

  void *__dest;

  void *__src;

  int iVar3;

  size_t __n;

  iVar3 = 0;

  while (__n = param_3 - iVar3, iVar3 != param_3) {   //possible issue identified - semgrep

    iVar1 = *(int *)(param_1 + 0x60);

    __src = (void *)(param_2 + iVar3);

    __dest = (void *)(param_1 + iVar1 + 0x20);

    if (__n + iVar1 < 0x40) {

      iVar3 = iVar3 + __n   //possible issue identified - semgrep

      memmove(__dest,__src,__n)   //possible issue identified - semgrep

      *(size_t *)(param_1 + 0x60) = *(int *)(param_1 + 0x60) + __n;

    }

    else {

      memmove(__dest,__src,0x40 - iVar1)   //possible issue identified - semgrep

      iVar1 = *(int *)(param_1 + 0x60);

      *(undefined4 *)(param_1 + 0x60) = 0x40;

      iVar3 = iVar3 + (0x40 - iVar1);

      RT_SHA1_Hash(param_1);

    }

  }

  uVar2 = *(uint *)(param_1 + 0x18) + iVar3;

  *(uint *)(param_1 + 0x1c) = (uint)(uVar2 < *(uint *)(param_1 + 0x18)) + *(int *)(param_1 + 0x1c);

  *(uint *)(param_1 + 0x18) = uVar2;

  return;

}