use crate::{
CAARecord, DnsRecord, DnsRecordType, Error, IntoFqdn, KeyValue, MXRecord, SRVRecord,
crypto::hmac_sha1,
http::{HttpClient, HttpClientBuilder},
utils::strip_origin_from_name,
};
use base64::{Engine, engine::general_purpose::STANDARD as BASE64_STANDARD};
use chrono::{SecondsFormat, Utc};
use reqwest::Method;
use serde::{Deserialize, Serialize};
use std::time::Duration;
const DEFAULT_ENDPOINT: &str = "https://rest.websupport.sk";
const SERVICES_PAGE_SIZE: u32 = 500;
#[derive(Clone)]
pub struct WebSupportProvider {
client: HttpClient,
api_key: String,
secret: String,
endpoint: String,
}
#[derive(Serialize, Debug)]
struct CreateRecord<'a> {
#[serde(rename = "type")]
record_type: &'static str,
name: &'a str,
content: String,
ttl: u32,
#[serde(skip_serializing_if = "Option::is_none")]
priority: Option<u16>,
#[serde(skip_serializing_if = "Option::is_none")]
port: Option<u16>,
#[serde(skip_serializing_if = "Option::is_none")]
weight: Option<u16>,
}
#[derive(Deserialize, Debug)]
struct WebSupportRecord {
id: i64,
#[serde(rename = "type")]
record_type: String,
name: String,
#[serde(default)]
content: String,
#[serde(default)]
priority: Option<u16>,
#[serde(default)]
port: Option<u16>,
#[serde(default)]
weight: Option<u16>,
}
#[derive(Deserialize, Debug)]
struct RecordResponse {
data: Vec<WebSupportRecord>,
}
#[derive(Deserialize, Debug)]
struct Service {
id: i64,
#[serde(rename = "serviceName", default)]
service_name: String,
#[serde(default)]
name: String,
}
#[derive(Deserialize, Debug)]
struct ServicesResponse {
items: Vec<Service>,
#[serde(default)]
pager: Option<Pager>,
}
#[derive(Deserialize, Debug)]
struct Pager {
#[serde(default)]
pagesize: Option<u32>,
#[serde(default)]
items: u32,
}
#[derive(Debug, Clone, PartialEq, Eq)]
struct RecordContent {
content: String,
priority: Option<u16>,
port: Option<u16>,
weight: Option<u16>,
}
#[derive(Debug, Clone)]
struct ListedRecord {
id: i64,
content: RecordContent,
}
impl WebSupportProvider {
pub(crate) fn new(
api_key: impl AsRef<str>,
secret: impl AsRef<str>,
timeout: Option<Duration>,
) -> crate::Result<Self> {
let api_key = api_key.as_ref();
let secret = secret.as_ref();
if api_key.is_empty() || secret.is_empty() {
return Err(Error::Api("WebSupport credentials missing".into()));
}
let client = HttpClientBuilder::default()
.with_header("Accept", "application/json")
.with_header("Accept-Language", "en_us")
.with_timeout(timeout)
.build();
Ok(Self {
client,
api_key: api_key.to_string(),
secret: secret.to_string(),
endpoint: DEFAULT_ENDPOINT.to_string(),
})
}
#[cfg(test)]
pub(crate) fn with_endpoint(self, endpoint: impl AsRef<str>) -> Self {
Self {
endpoint: endpoint.as_ref().to_string(),
..self
}
}
fn signed(
&self,
request: crate::http::HttpRequest,
method: Method,
path: &str,
) -> crate::http::HttpRequest {
let now = Utc::now();
let timestamp = now.timestamp();
let date = now.to_rfc3339_opts(SecondsFormat::Secs, true);
let canonical = format!("{} {} {}", method.as_str(), path, timestamp);
let signature = hex::encode(hmac_sha1(self.secret.as_bytes(), canonical.as_bytes()));
let basic = BASE64_STANDARD.encode(format!("{}:{}", self.api_key, signature));
request
.with_header("Authorization", format!("Basic {}", basic))
.with_header("Date", date)
}
pub(crate) async fn set_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
ttl: u32,
records: Vec<DnsRecord>,
origin: impl IntoFqdn<'_>,
) -> crate::Result<()> {
check_record_types(record_type, &records)?;
reject_unsupported_type(record_type)?;
let name = name.into_name();
let domain = origin.into_name();
let subdomain = strip_origin_from_name(&name, &domain, None);
let service_id = self.obtain_service_id(&domain).await?;
let desired = build_contents(record_type, records)?;
let existing = self.list_at(service_id, &subdomain, record_type).await?;
let mut existing_pool: Vec<ListedRecord> = existing;
let mut to_add: Vec<RecordContent> = Vec::new();
for content in desired {
if let Some(idx) = existing_pool.iter().position(|r| r.content == content) {
existing_pool.swap_remove(idx);
} else {
to_add.push(content);
}
}
for entry in existing_pool {
self.delete_record(service_id, entry.id).await?;
}
for content in to_add {
let body = content_to_create(record_type, &subdomain, ttl, content);
self.create_record(service_id, body).await?;
}
Ok(())
}
pub(crate) async fn add_to_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
ttl: u32,
records: Vec<DnsRecord>,
origin: impl IntoFqdn<'_>,
) -> crate::Result<()> {
if records.is_empty() {
return Ok(());
}
check_record_types(record_type, &records)?;
reject_unsupported_type(record_type)?;
let name = name.into_name();
let domain = origin.into_name();
let subdomain = strip_origin_from_name(&name, &domain, None);
let service_id = self.obtain_service_id(&domain).await?;
let desired = build_contents(record_type, records)?;
let existing = self.list_at(service_id, &subdomain, record_type).await?;
for content in desired {
if existing.iter().any(|r| r.content == content) {
continue;
}
let body = content_to_create(record_type, &subdomain, ttl, content);
self.create_record(service_id, body).await?;
}
Ok(())
}
pub(crate) async fn remove_from_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
records: Vec<DnsRecord>,
origin: impl IntoFqdn<'_>,
) -> crate::Result<()> {
if records.is_empty() {
return Ok(());
}
check_record_types(record_type, &records)?;
reject_unsupported_type(record_type)?;
let name = name.into_name();
let domain = origin.into_name();
let subdomain = strip_origin_from_name(&name, &domain, None);
let service_id = self.obtain_service_id(&domain).await?;
let to_remove = build_contents(record_type, records)?;
let existing = self.list_at(service_id, &subdomain, record_type).await?;
for content in to_remove {
if let Some(entry) = existing.iter().find(|r| r.content == content) {
self.delete_record(service_id, entry.id).await?;
}
}
Ok(())
}
pub(crate) async fn list_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
origin: impl IntoFqdn<'_>,
) -> crate::Result<Vec<DnsRecord>> {
reject_unsupported_type(record_type)?;
let name = name.into_name();
let domain = origin.into_name();
let subdomain = strip_origin_from_name(&name, &domain, None);
let service_id = self.obtain_service_id(&domain).await?;
let existing = self.list_at(service_id, &subdomain, record_type).await?;
existing
.into_iter()
.map(|r| record_from_listed(record_type, r.content))
.collect()
}
async fn obtain_service_id(&self, domain: &str) -> crate::Result<i64> {
const SERVICES_PATH: &str = "/v1/user/self/service";
let mut page: u32 = 1;
loop {
let url = format!(
"{}{}?page={}&pagesize={}",
self.endpoint, SERVICES_PATH, page, SERVICES_PAGE_SIZE
);
let response: ServicesResponse = self
.signed(self.client.get(url), Method::GET, SERVICES_PATH)
.send()
.await?;
let returned = response.items.len() as u32;
if let Some(found) = response
.items
.into_iter()
.find(|s| s.service_name == "domain" && s.name == domain)
{
return Ok(found.id);
}
let total = response.pager.as_ref().map(|p| p.items).unwrap_or(0);
let pagesize = response
.pager
.as_ref()
.and_then(|p| p.pagesize)
.unwrap_or(SERVICES_PAGE_SIZE);
let seen = page.saturating_mul(pagesize.max(1));
if returned == 0 || total == 0 || seen >= total {
return Err(Error::Api(format!(
"WebSupport domain service {} not found",
domain
)));
}
page += 1;
}
}
async fn list_at(
&self,
service_id: i64,
subdomain: &str,
record_type: DnsRecordType,
) -> crate::Result<Vec<ListedRecord>> {
let path = format!("/v2/service/{}/dns/record", service_id);
let url = format!("{}{}", self.endpoint, path);
let response: RecordResponse = self
.signed(self.client.get(url), Method::GET, &path)
.send()
.await?;
let type_str = record_type.as_str();
let mut out = Vec::new();
for r in response.data {
if r.name != subdomain || r.record_type != type_str {
continue;
}
out.push(ListedRecord {
id: r.id,
content: RecordContent {
content: r.content,
priority: r.priority,
port: r.port,
weight: r.weight,
},
});
}
Ok(out)
}
async fn create_record<'a>(
&self,
service_id: i64,
body: CreateRecord<'a>,
) -> crate::Result<()> {
let path = format!("/v2/service/{}/dns/record", service_id);
let url = format!("{}{}", self.endpoint, path);
self.signed(self.client.post(url).with_body(body)?, Method::POST, &path)
.send_with_retry::<serde_json::Value>(3)
.await
.map(|_| ())
}
async fn delete_record(&self, service_id: i64, record_id: i64) -> crate::Result<()> {
let path = format!("/v2/service/{}/dns/record/{}", service_id, record_id);
let url = format!("{}{}", self.endpoint, path);
self.signed(self.client.delete(url), Method::DELETE, &path)
.send_with_retry::<serde_json::Value>(3)
.await
.map(|_| ())
}
}
fn check_record_types(expected: DnsRecordType, records: &[DnsRecord]) -> crate::Result<()> {
for r in records {
if r.as_type() != expected {
return Err(Error::Api(format!(
"RRSet record type mismatch: expected {}, got {}",
expected.as_str(),
r.as_type().as_str(),
)));
}
}
Ok(())
}
fn reject_unsupported_type(record_type: DnsRecordType) -> crate::Result<()> {
if matches!(record_type, DnsRecordType::TLSA) {
return Err(Error::Unsupported(
"TLSA records are not supported by WebSupport".into(),
));
}
Ok(())
}
fn build_contents(
expected_type: DnsRecordType,
records: Vec<DnsRecord>,
) -> crate::Result<Vec<RecordContent>> {
let mut out = Vec::with_capacity(records.len());
for record in records {
if record.as_type() != expected_type {
return Err(Error::Api(format!(
"RRSet record type mismatch: expected {}, got {}",
expected_type.as_str(),
record.as_type().as_str(),
)));
}
out.push(record_to_content(record)?);
}
Ok(out)
}
fn record_to_content(record: DnsRecord) -> crate::Result<RecordContent> {
Ok(match record {
DnsRecord::A(addr) => RecordContent {
content: addr.to_string(),
priority: None,
port: None,
weight: None,
},
DnsRecord::AAAA(addr) => RecordContent {
content: addr.to_string(),
priority: None,
port: None,
weight: None,
},
DnsRecord::CNAME(target) => RecordContent {
content: target,
priority: None,
port: None,
weight: None,
},
DnsRecord::NS(target) => RecordContent {
content: target,
priority: None,
port: None,
weight: None,
},
DnsRecord::MX(mx) => RecordContent {
content: mx.exchange,
priority: Some(mx.priority),
port: None,
weight: None,
},
DnsRecord::TXT(text) => RecordContent {
content: text,
priority: None,
port: None,
weight: None,
},
DnsRecord::SRV(srv) => RecordContent {
content: srv.target,
priority: Some(srv.priority),
port: Some(srv.port),
weight: Some(srv.weight),
},
DnsRecord::CAA(caa) => RecordContent {
content: format!("{}", caa),
priority: None,
port: None,
weight: None,
},
DnsRecord::TLSA(_) => {
return Err(Error::Unsupported(
"TLSA records are not supported by WebSupport".into(),
));
}
})
}
fn content_to_create<'a>(
record_type: DnsRecordType,
name: &'a str,
ttl: u32,
content: RecordContent,
) -> CreateRecord<'a> {
CreateRecord {
record_type: record_type.as_str(),
name,
content: content.content,
ttl,
priority: content.priority,
port: content.port,
weight: content.weight,
}
}
fn record_from_listed(
record_type: DnsRecordType,
content: RecordContent,
) -> crate::Result<DnsRecord> {
Ok(match record_type {
DnsRecordType::A => {
DnsRecord::A(content.content.parse().map_err(|e| {
Error::Parse(format!("invalid A address {}: {}", content.content, e))
})?)
}
DnsRecordType::AAAA => DnsRecord::AAAA(content.content.parse().map_err(|e| {
Error::Parse(format!("invalid AAAA address {}: {}", content.content, e))
})?),
DnsRecordType::CNAME => DnsRecord::CNAME(content.content),
DnsRecordType::NS => DnsRecord::NS(content.content),
DnsRecordType::MX => DnsRecord::MX(MXRecord {
exchange: content.content,
priority: content.priority.unwrap_or(0),
}),
DnsRecordType::TXT => DnsRecord::TXT(content.content),
DnsRecordType::SRV => DnsRecord::SRV(SRVRecord {
target: content.content,
priority: content.priority.unwrap_or(0),
weight: content.weight.unwrap_or(0),
port: content.port.unwrap_or(0),
}),
DnsRecordType::CAA => DnsRecord::CAA(parse_caa(&content.content)?),
DnsRecordType::TLSA => {
return Err(Error::Unsupported(
"TLSA records are not supported by WebSupport".into(),
));
}
})
}
fn parse_caa(raw: &str) -> crate::Result<CAARecord> {
let trimmed = raw.trim();
let mut parts = trimmed.splitn(3, char::is_whitespace);
let flags_str = parts
.next()
.ok_or_else(|| Error::Parse(format!("invalid CAA record: {raw}")))?;
let tag = parts
.next()
.ok_or_else(|| Error::Parse(format!("invalid CAA record: {raw}")))?;
let value = parts
.next()
.ok_or_else(|| Error::Parse(format!("invalid CAA record: {raw}")))?;
let flags: u8 = flags_str
.parse()
.map_err(|e| Error::Parse(format!("invalid CAA flags {flags_str}: {e}")))?;
let issuer_critical = flags & 0x80 != 0;
let value_unquoted = value
.trim()
.strip_prefix('"')
.and_then(|s| s.strip_suffix('"'))
.unwrap_or(value.trim())
.to_string();
match tag {
"issue" => {
let (name, options) = parse_caa_issue_value(&value_unquoted);
Ok(CAARecord::Issue {
issuer_critical,
name,
options,
})
}
"issuewild" => {
let (name, options) = parse_caa_issue_value(&value_unquoted);
Ok(CAARecord::IssueWild {
issuer_critical,
name,
options,
})
}
"iodef" => Ok(CAARecord::Iodef {
issuer_critical,
url: value_unquoted,
}),
other => Err(Error::Parse(format!("unknown CAA tag: {other}"))),
}
}
fn parse_caa_issue_value(value: &str) -> (Option<String>, Vec<KeyValue>) {
let mut parts = value.split(';').map(str::trim);
let name_part = parts.next().unwrap_or("").trim().to_string();
let name = if name_part.is_empty() {
None
} else {
Some(name_part)
};
let options = parts
.filter(|p| !p.is_empty())
.map(|p| match p.split_once('=') {
Some((k, v)) => KeyValue {
key: k.trim().to_string(),
value: v.trim().to_string(),
},
None => KeyValue {
key: p.trim().to_string(),
value: String::new(),
},
})
.collect();
(name, options)
}