AutoLogin.ps1

<#
.SYNOPSIS
    Auto-login to IUST captive portal.

.DESCRIPTION
    Set your credentials below, or leave blank to be prompted.
#>

# ========== CONFIG ==========
$Username = ""  # e.g. "student123"
$Password = ""  # e.g. "pa$$w0rd"
# ============================

# Prompt for username/password if empty
if ([string]::IsNullOrWhiteSpace($Username)) {
    $Username = Read-Host "Enter your username"
}
if ([string]::IsNullOrWhiteSpace($Password)) {
    $Secure = Read-Host "Enter your password" -AsSecureString
    $Password = [Runtime.InteropServices.Marshal]::PtrToStringAuto(
        [Runtime.InteropServices.Marshal]::SecureStringToBSTR($Secure)
    )
}

# Initialize session
$session = New-Object Microsoft.PowerShell.Commands.WebRequestSession

# STEP 1: Submit login.php to get response
Write-Host "`n[Step 1] Logging in..." -ForegroundColor Cyan
$response = Invoke-WebRequest -UseBasicParsing -Uri "https://login.iust.ac.ir/login.php" `
  -Method "POST" `
  -WebSession $session `
  -ContentType "application/x-www-form-urlencoded" `
  -Body "dst=status.html&popup=false&username=$Username&password=$Password"

# Extract values using regex
$formAction = ""
$dst = ""
$jsUsername = ""
$jsPassword = ""

if ($response.RawContent -match '<form[^>]*action="([^"]+)"') {
    $formAction = $matches[1]
}
if ($response.Content -match '<input[^>]*name="dst"[^>]*value="([^"]+)"') {
    $dst = $matches[1]
}
if ($response.RawContent -match "document\.login\.username\.value\s*=\s*'([^']+)'") {
    $jsUsername = $matches[1]
}
if ($response.RawContent -match "document\.login\.password\.value\s*=\s*'([^']+)'") {
    $jsPassword = $matches[1]
}

Write-Host "→ Form action URL: $formAction"
Write-Host "→ Hidden dst value: $dst"
Write-Host "→ JS username: $jsUsername"
Write-Host "→ JS password hash: $jsPassword"

# STEP 2: Submit actual login form
Write-Host "`n[Step 2] Submitting form..." -ForegroundColor Cyan

$authResponse = Invoke-WebRequest -UseBasicParsing `
    -Uri $formAction `
    -Method POST `
    -WebSession $session `
    -ContentType "application/x-www-form-urlencoded" `
    -Body @{
        username = $jsUsername
        password = $jsPassword
        dst      = $dst
        popup    = "true"
    }

# Show results
Write-Host "`n=== Captive Portal Response ===" -ForegroundColor Green
Write-Host "Status Code : $($authResponse.StatusCode)"
Write-Host "Final URL   : $($authResponse.BaseResponse.ResponseUri)"
$snippet = $authResponse.RawContent.Substring(0, [Math]::Min(200, $authResponse.RawContent.Length))
Write-Host "Body Snippet:`n$snippet…"

autologin.sh

#!/usr/bin/env bash
#
# Auto‑login to IUST captive portal using bash + curl
#

set -euo pipefail

# ========= CONFIG =========
USER=""  # e.g. "student123"
PASS=""  # e.g. "myp@ssw0rd"
# ==========================

# Prompt for missing fields
if [[ -z "$USER" ]]; then
  read -p "Enter your username: " USER
fi

if [[ -z "$PASS" ]]; then
  read -s -p "Enter your password: " PASS
  echo
fi

LOGIN_URL="https://login.iust.ac.ir/login.php"

# Temporary files
COOKIE_JAR=$(mktemp)
FIRST_RESP=$(mktemp)
SECOND_BODY=$(mktemp)

cleanup() {
  rm -f "$COOKIE_JAR" "$FIRST_RESP" "$SECOND_BODY"
}
trap cleanup EXIT

echo -e "\n[Step 1] Submitting login form…"
curl -s -L \
  -c "$COOKIE_JAR" \
  -e "$LOGIN_URL" \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "dst=status.html&popup=false&username=${USER}&password=${PASS}" \
  "$LOGIN_URL" > "$FIRST_RESP"

# Extract fields using grep + PCRE
FORM_ACTION=$(grep -oP '<form[^>]*action="\K[^"]+' "$FIRST_RESP" || echo "")
DST=$(grep -oP '<input[^>]*name="dst"[^>]*value="\K[^"]+' "$FIRST_RESP" || echo "")
JS_USER=$(grep -oP "document\.login\.username\.value\s*=\s*'\K[^']+" "$FIRST_RESP" || echo "")
JS_PASS=$(grep -oP "document\.login\.password\.value\s*=\s*'\K[^']+" "$FIRST_RESP" || echo "")

echo "→ Form action URL : $FORM_ACTION"
echo "→ Hidden dst value: $DST"
echo "→ JS username     : $JS_USER"
echo "→ JS password hash: $JS_PASS"

if [[ -z "$FORM_ACTION" || -z "$JS_USER" || -z "$JS_PASS" ]]; then
  echo "✖ Failed to parse response. Aborting."
  exit 1
fi

echo -e "\n[Step 2] Sending login to captive portal…"
HTTP_CODE=$(curl -s -L \
  -b "$COOKIE_JAR" \
  -c "$COOKIE_JAR" \
  -e "$FORM_ACTION" \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "username=${JS_USER}&password=${JS_PASS}&dst=${DST}&popup=true" \
  -w "%{http_code}" \
  -o "$SECOND_BODY" \
  "$FORM_ACTION")

echo -e "\n=== Captive Portal Response ==="
echo "Status Code : $HTTP_CODE"
FINAL_URL=$(grep -i '^location:' -m1 "$SECOND_BODY" | sed -E 's/^[Ll]ocation:[[:space:]]*//')
[[ -n "$FINAL_URL" ]] && echo "Final URL   : $FINAL_URL"
echo -e "Body Snippet:\n$(head -c 200 "$SECOND_BODY")…"

RunLogin.bat

@echo off
REM -------------------------
REM Runs IUST captive‑portal login (with creds in script)
REM -------------------------

powershell.exe -NoProfile -ExecutionPolicy Bypass -File "%~dp0AutoLogin.ps1"
pause

WhatIsThis.md

What is this?

just enter you credentials and let it do the sign in

There is PowerShell version and BASH version too