326 lines
12 KiB
Rust
326 lines
12 KiB
Rust
use anyhow::{Error, format_err, bail};
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use lazy_static::lazy_static;
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use serde_json::json;
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use serde::{Deserialize, Serialize};
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use regex::Regex;
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use proxmox::api::api;
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use crate::tools;
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use crate::tools::http;
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use proxmox::tools::fs::{replace_file, CreateOptions};
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/// How long the local key is valid for in between remote checks
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pub const MAX_LOCAL_KEY_AGE: i64 = 15 * 24 * 3600;
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const MAX_KEY_CHECK_FAILURE_AGE: i64 = 5 * 24 * 3600;
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const SHARED_KEY_DATA: &str = "kjfdlskfhiuewhfk947368";
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const SUBSCRIPTION_FN: &str = "/etc/proxmox-backup/subscription";
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const APT_AUTH_FN: &str = "/etc/apt/auth.conf.d/pbs.conf";
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#[api()]
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#[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
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#[serde(rename_all = "lowercase")]
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/// Subscription status
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pub enum SubscriptionStatus {
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// FIXME: remove?
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/// newly set subscription, not yet checked
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NEW,
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/// no subscription set
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NOTFOUND,
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/// subscription set and active
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ACTIVE,
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/// subscription set but invalid for this server
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INVALID,
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}
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impl Default for SubscriptionStatus {
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fn default() -> Self { SubscriptionStatus::NOTFOUND }
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}
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impl std::fmt::Display for SubscriptionStatus {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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SubscriptionStatus::NEW => write!(f, "New"),
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SubscriptionStatus::NOTFOUND => write!(f, "NotFound"),
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SubscriptionStatus::ACTIVE => write!(f, "Active"),
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SubscriptionStatus::INVALID => write!(f, "Invalid"),
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}
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}
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}
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#[api(
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properties: {
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status: {
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type: SubscriptionStatus,
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},
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},
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)]
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#[derive(Debug, Default, PartialEq, Serialize, Deserialize)]
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#[serde(rename_all="kebab-case")]
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/// Proxmox subscription information
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pub struct SubscriptionInfo {
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/// Subscription status from the last check
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pub status: SubscriptionStatus,
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/// the server ID, if permitted to access
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#[serde(skip_serializing_if="Option::is_none")]
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pub serverid: Option<String>,
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/// timestamp of the last check done
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#[serde(skip_serializing_if="Option::is_none")]
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pub checktime: Option<i64>,
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/// the subscription key, if set and permitted to access
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#[serde(skip_serializing_if="Option::is_none")]
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pub key: Option<String>,
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/// a more human readable status message
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#[serde(skip_serializing_if="Option::is_none")]
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pub message: Option<String>,
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/// human readable productname of the set subscription
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#[serde(skip_serializing_if="Option::is_none")]
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pub productname: Option<String>,
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/// register date of the set subscription
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#[serde(skip_serializing_if="Option::is_none")]
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pub regdate: Option<String>,
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/// next due date of the set subscription
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#[serde(skip_serializing_if="Option::is_none")]
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pub nextduedate: Option<String>,
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/// URL to the web shop
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#[serde(skip_serializing_if="Option::is_none")]
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pub url: Option<String>,
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}
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async fn register_subscription(
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key: &str,
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server_id: &str,
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checktime: i64
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) -> Result<(String, String), Error> {
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// WHCMS sample code feeds the key into this, but it's just a challenge, so keep it simple
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let rand = proxmox::tools::bin_to_hex(&proxmox::sys::linux::random_data(16)?);
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let challenge = format!("{}{}", checktime, rand);
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let params = json!({
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"licensekey": key,
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"dir": server_id,
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"domain": "www.proxmox.com",
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"ip": "localhost",
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"check_token": challenge,
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});
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let uri = "https://shop.maurer-it.com/modules/servers/licensing/verify.php";
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let query = tools::json_object_to_query(params)?;
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let response = http::post(uri, Some(query), Some("application/x-www-form-urlencoded")).await?;
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let body = http::response_body_string(response).await?;
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Ok((body, challenge))
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}
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fn parse_status(value: &str) -> SubscriptionStatus {
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match value.to_lowercase().as_str() {
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"active" => SubscriptionStatus::ACTIVE,
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"new" => SubscriptionStatus::NEW,
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"notfound" => SubscriptionStatus::NOTFOUND,
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"invalid" => SubscriptionStatus::INVALID,
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_ => SubscriptionStatus::INVALID,
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}
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}
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fn parse_register_response(
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body: &str,
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key: String,
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server_id: String,
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checktime: i64,
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challenge: &str,
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) -> Result<SubscriptionInfo, Error> {
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lazy_static! {
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static ref ATTR_RE: Regex = Regex::new(r"<([^>]+)>([^<]+)</[^>]+>").unwrap();
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}
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let mut info = SubscriptionInfo {
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key: Some(key),
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status: SubscriptionStatus::NOTFOUND,
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checktime: Some(checktime),
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url: Some("https://www.proxmox.com/en/proxmox-backup-server/pricing".into()),
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..Default::default()
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};
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let mut md5hash = String::new();
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let is_server_id = |id: &&str| *id == server_id;
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for caps in ATTR_RE.captures_iter(body) {
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let (key, value) = (&caps[1], &caps[2]);
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match key {
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"status" => info.status = parse_status(value),
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"productname" => info.productname = Some(value.into()),
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"regdate" => info.regdate = Some(value.into()),
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"nextduedate" => info.nextduedate = Some(value.into()),
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"message" if value == "Directory Invalid" =>
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info.message = Some("Invalid Server ID".into()),
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"message" => info.message = Some(value.into()),
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"validdirectory" => {
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if value.split(',').find(is_server_id) == None {
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bail!("Server ID does not match");
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}
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info.serverid = Some(server_id.to_owned());
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},
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"md5hash" => md5hash = value.to_owned(),
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_ => (),
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}
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}
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if let SubscriptionStatus::ACTIVE = info.status {
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let response_raw = format!("{}{}", SHARED_KEY_DATA, challenge);
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let expected = proxmox::tools::bin_to_hex(&tools::md5sum(response_raw.as_bytes())?);
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if expected != md5hash {
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bail!("Subscription API challenge failed, expected {} != got {}", expected, md5hash);
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}
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}
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Ok(info)
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}
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#[test]
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fn test_parse_register_response() -> Result<(), Error> {
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let response = r#"
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<status>Active</status>
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<companyname>Proxmox</companyname>
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<serviceid>41108</serviceid>
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<productid>71</productid>
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<productname>Proxmox Backup Server Test Subscription -1 year</productname>
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<regdate>2020-09-19 00:00:00</regdate>
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<nextduedate>2021-09-19</nextduedate>
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<billingcycle>Annually</billingcycle>
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<validdomain>proxmox.com,www.proxmox.com</validdomain>
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<validdirectory>830000000123456789ABCDEF00000042</validdirectory>
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<customfields>Notes=Test Key!</customfields>
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<addons></addons>
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<md5hash>969f4df84fe157ee4f5a2f71950ad154</md5hash>
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"#;
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let key = "pbst-123456789a".to_string();
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let server_id = "830000000123456789ABCDEF00000042".to_string();
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let checktime = 1600000000;
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let salt = "cf44486bddb6ad0145732642c45b2957";
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let info = parse_register_response(response, key.to_owned(), server_id.to_owned(), checktime, salt)?;
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assert_eq!(info, SubscriptionInfo {
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key: Some(key),
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serverid: Some(server_id),
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status: SubscriptionStatus::ACTIVE,
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checktime: Some(checktime),
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url: Some("https://www.proxmox.com/en/proxmox-backup-server/pricing".into()),
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message: None,
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nextduedate: Some("2021-09-19".into()),
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regdate: Some("2020-09-19 00:00:00".into()),
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productname: Some("Proxmox Backup Server Test Subscription -1 year".into()),
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});
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Ok(())
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}
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/// querys the up to date subscription status and parses the response
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pub fn check_subscription(key: String, server_id: String) -> Result<SubscriptionInfo, Error> {
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let now = proxmox::tools::time::epoch_i64();
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let (response, challenge) = tools::runtime::block_on(register_subscription(&key, &server_id, now))
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.map_err(|err| format_err!("Error checking subscription: {}", err))?;
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parse_register_response(&response, key, server_id, now, &challenge)
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.map_err(|err| format_err!("Error parsing subscription check response: {}", err))
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}
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/// reads in subscription information and does a basic integrity verification
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pub fn read_subscription() -> Result<Option<SubscriptionInfo>, Error> {
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let cfg = proxmox::tools::fs::file_read_optional_string(&SUBSCRIPTION_FN)?;
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let cfg = if let Some(cfg) = cfg { cfg } else { return Ok(None); };
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let mut cfg = cfg.lines();
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// first line is key in plain
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let _key = if let Some(key) = cfg.next() { key } else { return Ok(None) };
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// second line is checksum of encoded data
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let checksum = if let Some(csum) = cfg.next() { csum } else { return Ok(None) };
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let encoded: String = cfg.collect::<String>();
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let decoded = base64::decode(encoded.to_owned())?;
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let decoded = std::str::from_utf8(&decoded)?;
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let info: SubscriptionInfo = serde_json::from_str(decoded)?;
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let new_checksum = format!("{}{}{}", info.checktime.unwrap_or(0), encoded, SHARED_KEY_DATA);
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let new_checksum = base64::encode(tools::md5sum(new_checksum.as_bytes())?);
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if checksum != new_checksum {
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bail!("stored checksum doesn't matches computed one '{}' != '{}'", checksum, new_checksum);
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}
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let age = proxmox::tools::time::epoch_i64() - info.checktime.unwrap_or(0);
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if age < -5400 { // allow some delta for DST changes or time syncs, 1.5h
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bail!("Last check time to far in the future.");
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} else if age > MAX_LOCAL_KEY_AGE + MAX_KEY_CHECK_FAILURE_AGE {
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if let SubscriptionStatus::ACTIVE = info.status {
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bail!("subscription information too old");
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}
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}
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Ok(Some(info))
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}
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/// writes out subscription status
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pub fn write_subscription(info: SubscriptionInfo) -> Result<(), Error> {
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let key = info.key.to_owned();
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let server_id = info.serverid.to_owned();
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let raw = if info.key == None || info.checktime == None {
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String::new()
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} else if let SubscriptionStatus::NEW = info.status {
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format!("{}\n", info.key.unwrap())
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} else {
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let encoded = base64::encode(serde_json::to_string(&info)?);
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let csum = format!("{}{}{}", info.checktime.unwrap_or(0), encoded, SHARED_KEY_DATA);
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let csum = base64::encode(tools::md5sum(csum.as_bytes())?);
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format!("{}\n{}\n{}\n", info.key.unwrap(), csum, encoded)
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};
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let backup_user = crate::backup::backup_user()?;
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let mode = nix::sys::stat::Mode::from_bits_truncate(0o0640);
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let file_opts = CreateOptions::new()
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.perm(mode)
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.owner(nix::unistd::ROOT)
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.group(backup_user.gid);
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let subscription_file = std::path::Path::new(SUBSCRIPTION_FN);
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replace_file(subscription_file, raw.as_bytes(), file_opts)?;
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update_apt_auth(key, server_id)?;
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Ok(())
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}
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/// deletes subscription from server
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pub fn delete_subscription() -> Result<(), Error> {
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let subscription_file = std::path::Path::new(SUBSCRIPTION_FN);
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nix::unistd::unlink(subscription_file)?;
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update_apt_auth(None, None)?;
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Ok(())
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}
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/// updates apt authenification for repo access
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pub fn update_apt_auth(key: Option<String>, password: Option<String>) -> Result<(), Error> {
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let auth_conf = std::path::Path::new(APT_AUTH_FN);
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match (key, password) {
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(Some(key), Some(password)) => {
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let conf = format!(
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"machine enterprise.proxmox.com/debian/pbs\n login {}\n password {}\n",
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key,
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password,
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);
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let mode = nix::sys::stat::Mode::from_bits_truncate(0o0640);
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let file_opts = CreateOptions::new()
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.perm(mode)
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.owner(nix::unistd::ROOT);
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// we use a namespaced .conf file, so just overwrite..
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replace_file(auth_conf, conf.as_bytes(), file_opts)
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.map_err(|e| format_err!("Error saving apt auth config - {}", e))?;
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}
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_ => nix::unistd::unlink(auth_conf)
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.map_err(|e| format_err!("Error clearing apt auth config - {}", e))?,
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}
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Ok(())
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}
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