#!/bin/sh
alias curl="curl \
    -H 'Pragma: no-cache' \
    -H 'Connection: keep-alive' \
    -H 'Cache-Control: no-cache' \
    -H 'Upgrade-Insecure-Requests: 1' \
    -H 'User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/128.0' \
    -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8' \
    -H 'Accept-Encoding: gzip, deflate, br' \
    -H 'Accept-Language: es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3' \
    -H 'Referer: https://www.soportefirmadigital.com/sfdj/dl.aspx?lang=en' \
    -H 'Content-Type: application/x-www-form-urlencoded' \
    -H 'Sec-Fetch-Dest: document' \
    -H 'Sec-Fetch-Mode: navigate' \
    -H 'Sec-Fetch-Site: same-origin' \
    -H 'Sec-Fetch-User: ?1' \
"

urlencode() {
    ENCODEDURL="$(tr -d '\n' | curl -Gs -w %{url_effective} --data-urlencode @- ./ ||: | sed "s/%0[aA]$//;s/^[^?]*?\(.*\)/\1/")"
    printf '%s' "$ENCODEDURL" | sed 's/^http.*?//g'
}

get_asp_var() {
    VARS="$@" ; i=0
    for VAR in $VARS ; do
        VAL="$(printf '%s' "$REQUEST" | grep -o "id=\"$VAR\"\svalue=\".*\"" | cut -d '"' -f 4 | urlencode)"
        [ "$i" != 0 ] && printf '&'
        printf '%s=%s' "$VAR" "$VAL"
        i=+1
    done
}

download_iso() {
    SN="1234"
    URL="https://soportefirmadigital.com/sfdj/dl.aspx"
    hiddenISO="ClientesLinux_DEB64_Rev25.zip"
    ddlInstaladores="Usuarios+Linux+%28DEB+64bits%29"
    txtDescripcion="Distribuciones+basadas+en+DEB+x64.%0D%0AVersiones+Homologadas%0D%0A-Ubuntu+18.04+LTS+o+superior%28solo+versiones+LTS%29%0D%0A-Debian+10%0D%0A%0D%0ASoporte+%C3%BAnicamente+en+m%C3%A1quinas+F%C3%ADsicas.%0D%0AMD5%3A3a8c11d0273daee7bfc63a17615a8dc9"

    REQUEST="$(curl -s --compressed "$URL" -o -)"

    ASP_VARS="$(get_asp_var __VIEWSTATE __VIEWSTATEGENERATOR __EVENTVALIDATION)"
    REQUEST="$(curl -Ls --compressed "$URL" \
        --data-raw "__EVENTTARGET=ctl00%24certContents%24ddlInstaladores" \
        --data-raw "__EVENTARGUMENT=" \
        --data-raw "__LASTFOCUS=" \
        --data-raw "$ASP_VARS" \
        --data-raw "ctl00%24certContents%24hiddenISO=Windows_rev62.exe" \
        --data-raw "ctl00%24certContents%24hidden_ISO_URL=-" \
        --data-raw "ctl00%24certContents%24txtSerialNumber=" \
        --data-raw "ctl00%24certContents%24ddlInstaladores=$ddlInstaladores" \
        --data-raw "ctl00%24certContents%24txtDescripcion=$txtDescripcion" \
        --data-raw "ctl00%24certContents%24chkConfirmo=" \
        --data-raw "ctl00%24certContents%24hiddenABID=" \
        -o -)"

    ASP_VARS="$(get_asp_var __VIEWSTATE __VIEWSTATEGENERATOR __EVENTVALIDATION)"
    REQUEST="$(curl -H "Set-Cookie: SN=$SN" -s --compressed "$URL" \
        --cookie "SN=$SN" \
        --data-raw "__EVENTTARGET=ctl00%24certContents%24LinkButton3" \
        --data-raw "__EVENTARGUMENT=" \
        --data-raw "__LASTFOCUS=" \
        --data-raw "$ASP_VARS" \
        --data-raw "ctl00%24certContents%24hiddenISO=$hiddenISO" \
        --data-raw "ctl00%24certContents%24hidden_ISO_URL=-" \
        --data-raw "ctl00%24certContents%24txtSerialNumber=$SN" \
        --data-raw "ctl00%24certContents%24ddlInstaladores=$ddlInstaladores" \
        --data-raw "ctl00%24certContents%24txtDescripcion=$txtDescripcion" \
        --data-raw "ctl00%24certContents%24chkConfirmo=on" \
        --data-raw "ctl00%24certContents%24hiddenABID=" \
        -o -)"

    printf '%s' "$REQUEST"
}

download_iso