use std::time::Duration;
use chrono::Utc;
use serde::Deserialize;
use crate::{
CAARecord, DnsRecord, DnsRecordType, Error, IntoFqdn, KeyValue, MXRecord, SRVRecord,
crypto::{hmac_sha256, sha256_digest},
http::{HttpClient, HttpClientBuilder},
utils::strip_origin_from_name,
};
const DEFAULT_HOST: &str = "alidns.aliyuncs.com";
const API_VERSION: &str = "2015-01-09";
const ALGORITHM: &str = "ACS3-HMAC-SHA256";
#[derive(Clone)]
pub struct AlidnsProvider {
client: HttpClient,
access_key: String,
secret_key: String,
security_token: Option<String>,
line: Option<String>,
endpoint: String,
host: String,
}
#[derive(Deserialize, Debug)]
struct ApiError {
#[serde(rename = "Code", default)]
code: String,
#[serde(rename = "Message", default)]
message: String,
}
#[derive(Deserialize, Debug)]
struct DescribeDomainsResponse {
#[serde(rename = "Domains", default)]
domains: Option<DomainsField>,
#[serde(rename = "TotalCount", default)]
total_count: u64,
#[serde(rename = "PageSize", default)]
page_size: u64,
}
#[derive(Deserialize, Debug, Clone)]
struct DomainsField {
#[serde(rename = "Domain", default)]
domain: Vec<Domain>,
}
#[derive(Deserialize, Debug, Clone)]
struct Domain {
#[serde(rename = "DomainName")]
domain_name: String,
#[serde(rename = "PunyCode", default)]
puny_code: String,
}
#[derive(Deserialize, Debug)]
struct DescribeDomainRecordsResponse {
#[serde(rename = "DomainRecords", default)]
domain_records: Option<DomainRecordsField>,
}
#[derive(Deserialize, Debug, Clone)]
struct DomainRecordsField {
#[serde(rename = "Record", default)]
record: Vec<Record>,
}
#[derive(Deserialize, Debug, Clone)]
struct Record {
#[serde(rename = "RecordId")]
record_id: String,
#[serde(rename = "RR")]
rr: String,
#[serde(rename = "Type")]
record_type: String,
#[serde(rename = "Value", default)]
value: String,
#[serde(rename = "TTL", default)]
ttl: u32,
#[serde(rename = "Priority", default)]
priority: Option<u16>,
}
impl AlidnsProvider {
pub(crate) fn new(
access_key: impl AsRef<str>,
secret_key: impl AsRef<str>,
region: Option<impl AsRef<str>>,
security_token: Option<impl AsRef<str>>,
line: Option<impl AsRef<str>>,
timeout: Option<Duration>,
) -> crate::Result<Self> {
let client = HttpClientBuilder::default().with_timeout(timeout).build();
let host = region
.map(|r| {
let region = r.as_ref();
if region.is_empty() {
DEFAULT_HOST.to_string()
} else {
format!("alidns.{}.aliyuncs.com", region)
}
})
.unwrap_or_else(|| DEFAULT_HOST.to_string());
Ok(Self {
client,
access_key: access_key.as_ref().to_string(),
secret_key: secret_key.as_ref().to_string(),
security_token: security_token.map(|s| s.as_ref().to_string()),
line: line
.map(|l| l.as_ref().to_string())
.filter(|s| !s.is_empty()),
endpoint: format!("https://{}", host),
host,
})
}
#[cfg(test)]
pub(crate) fn with_endpoint(self, endpoint: impl AsRef<str>) -> Self {
let url = endpoint.as_ref().to_string();
let host = url
.strip_prefix("http://")
.or_else(|| url.strip_prefix("https://"))
.map(|s| s.split('/').next().unwrap_or(s).to_string())
.unwrap_or_else(|| DEFAULT_HOST.to_string());
Self {
endpoint: url,
host,
..self
}
}
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)?;
let name = name.into_name();
let origin = origin.into_name();
let zone = self.find_zone(&origin).await?;
let rr = strip_origin_from_name(&name, &zone, Some("@"));
let type_str = record_type.as_str();
if records.is_empty() {
return self.delete_sub_domain_records(&zone, &rr, type_str).await;
}
let desired = build_alidns_records(records)?;
let mut existing = self.list_rrset_records(&zone, &rr, type_str).await?;
let mut to_add: Vec<&AlidnsRecord> = Vec::new();
for d in &desired {
if let Some(idx) = existing
.iter()
.position(|c| c.value == d.value && c.priority == d.priority)
{
existing.swap_remove(idx);
} else {
to_add.push(d);
}
}
for stale in &existing {
self.delete_domain_record(&stale.record_id).await?;
}
for d in to_add {
self.add_domain_record(&zone, &rr, ttl, d).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<()> {
check_record_types(record_type, &records)?;
if records.is_empty() {
return Ok(());
}
let name = name.into_name();
let origin = origin.into_name();
let zone = self.find_zone(&origin).await?;
let rr = strip_origin_from_name(&name, &zone, Some("@"));
let type_str = record_type.as_str();
let desired = build_alidns_records(records)?;
let existing = self.list_rrset_records(&zone, &rr, type_str).await?;
for d in &desired {
if existing
.iter()
.any(|c| c.value == d.value && c.priority == d.priority)
{
continue;
}
self.add_domain_record(&zone, &rr, ttl, d).await?;
}
Ok(())
}
pub(crate) async fn remove_from_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
records: Vec<DnsRecord>,
origin: impl IntoFqdn<'_>,
) -> crate::Result<()> {
check_record_types(record_type, &records)?;
if records.is_empty() {
return Ok(());
}
let name = name.into_name();
let origin = origin.into_name();
let zone = self.find_zone(&origin).await?;
let rr = strip_origin_from_name(&name, &zone, Some("@"));
let type_str = record_type.as_str();
let to_remove = build_alidns_records(records)?;
let existing = self.list_rrset_records(&zone, &rr, type_str).await?;
for d in &to_remove {
if let Some(entry) = existing
.iter()
.find(|c| c.value == d.value && c.priority == d.priority)
{
self.delete_domain_record(&entry.record_id).await?;
}
}
Ok(())
}
pub(crate) async fn list_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
origin: impl IntoFqdn<'_>,
) -> crate::Result<Vec<DnsRecord>> {
let name = name.into_name();
let origin = origin.into_name();
let zone = self.find_zone(&origin).await?;
let rr = strip_origin_from_name(&name, &zone, Some("@"));
let type_str = record_type.as_str();
let listed = self.list_rrset_records(&zone, &rr, type_str).await?;
let mut out = Vec::with_capacity(listed.len());
for r in listed {
out.push(record_from_listed(record_type, &r)?);
}
Ok(out)
}
async fn list_rrset_records(
&self,
zone: &str,
rr: &str,
record_type: &str,
) -> crate::Result<Vec<ListedRrsetRecord>> {
let params = vec![
("Action".to_string(), "DescribeDomainRecords".to_string()),
("DomainName".to_string(), zone.to_string()),
("RRKeyWord".to_string(), rr.to_string()),
("TypeKeyWord".to_string(), record_type.to_string()),
("SearchMode".to_string(), "EXACT".to_string()),
("PageSize".to_string(), "500".to_string()),
];
let raw = self.send(params).await?;
let resp: DescribeDomainRecordsResponse = serde_json::from_str(&raw).map_err(|err| {
Error::Serialize(format!(
"Failed to parse Alidns DescribeDomainRecords: {err}"
))
})?;
let records = resp
.domain_records
.map(|f| f.record)
.unwrap_or_default()
.into_iter()
.filter(|r| r.rr == rr && r.record_type == record_type)
.map(|r| ListedRrsetRecord {
record_id: r.record_id,
value: r.value,
ttl: r.ttl,
priority: if record_type == "MX" {
r.priority
} else {
None
},
})
.collect();
Ok(records)
}
async fn add_domain_record(
&self,
zone: &str,
rr: &str,
ttl: u32,
record: &AlidnsRecord,
) -> crate::Result<()> {
let mut params = vec![
("Action".to_string(), "AddDomainRecord".to_string()),
("DomainName".to_string(), zone.to_string()),
("RR".to_string(), rr.to_string()),
("Type".to_string(), record.record_type.clone()),
("Value".to_string(), record.value.clone()),
("TTL".to_string(), ttl.to_string()),
];
if let Some(line) = &self.line {
params.push(("Line".to_string(), line.clone()));
}
if let Some(priority) = record.priority {
params.push(("Priority".to_string(), priority.to_string()));
}
self.send(params).await.map(|_| ())
}
async fn delete_domain_record(&self, record_id: &str) -> crate::Result<()> {
let params = vec![
("Action".to_string(), "DeleteDomainRecord".to_string()),
("RecordId".to_string(), record_id.to_string()),
];
self.send(params).await.map(|_| ())
}
async fn delete_sub_domain_records(
&self,
zone: &str,
rr: &str,
record_type: &str,
) -> crate::Result<()> {
let params = vec![
("Action".to_string(), "DeleteSubDomainRecords".to_string()),
("DomainName".to_string(), zone.to_string()),
("RR".to_string(), rr.to_string()),
("Type".to_string(), record_type.to_string()),
];
self.send(params).await.map(|_| ())
}
async fn find_zone(&self, origin: &str) -> crate::Result<String> {
let zone_name = origin.trim_end_matches('.').to_string();
let mut page: u64 = 1;
let mut collected: Vec<Domain> = Vec::new();
loop {
let params = vec![
("Action".to_string(), "DescribeDomains".to_string()),
("PageNumber".to_string(), page.to_string()),
("PageSize".to_string(), "100".to_string()),
];
let raw = self.send(params).await?;
let resp: DescribeDomainsResponse = serde_json::from_str(&raw).map_err(|err| {
Error::Serialize(format!("Failed to parse Alidns DescribeDomains: {err}"))
})?;
if let Some(field) = &resp.domains {
collected.extend(field.domain.iter().cloned());
}
let fetched = page * resp.page_size.max(1);
if fetched >= resp.total_count
|| resp
.domains
.as_ref()
.map(|f| f.domain.is_empty())
.unwrap_or(true)
{
break;
}
page += 1;
}
collected
.into_iter()
.find(|d| d.domain_name == zone_name || d.puny_code == zone_name)
.map(|d| d.domain_name)
.ok_or_else(|| Error::Api(format!("Alidns zone not found for {}", zone_name)))
}
async fn send(&self, mut params: Vec<(String, String)>) -> crate::Result<String> {
params.push(("Version".to_string(), API_VERSION.to_string()));
params.sort_by(|a, b| a.0.cmp(&b.0));
let canonical_querystring = params
.iter()
.map(|(k, v)| format!("{}={}", percent_encode(k), percent_encode(v)))
.collect::<Vec<_>>()
.join("&");
let url = format!("{}/?{}", self.endpoint, canonical_querystring);
let now = Utc::now();
let amz_date = now.format("%Y-%m-%dT%H:%M:%SZ").to_string();
let nonce = format!(
"{}{}",
now.timestamp_nanos_opt().unwrap_or(0),
now.timestamp_subsec_nanos()
);
let payload_hash = hex::encode(sha256_digest(b""));
let mut canonical_headers_pairs: Vec<(String, String)> = vec![
("host".to_string(), self.host.clone()),
("x-acs-action".to_string(), action_from_params(¶ms)),
("x-acs-content-sha256".to_string(), payload_hash.clone()),
("x-acs-date".to_string(), amz_date.clone()),
("x-acs-signature-nonce".to_string(), nonce.clone()),
("x-acs-version".to_string(), API_VERSION.to_string()),
];
if let Some(token) = &self.security_token {
canonical_headers_pairs.push(("x-acs-security-token".to_string(), token.clone()));
}
canonical_headers_pairs.sort_by(|a, b| a.0.cmp(&b.0));
let canonical_headers = canonical_headers_pairs
.iter()
.map(|(k, v)| format!("{}:{}\n", k, v.trim()))
.collect::<String>();
let signed_headers = canonical_headers_pairs
.iter()
.map(|(k, _)| k.clone())
.collect::<Vec<_>>()
.join(";");
let canonical_request = format!(
"GET\n/\n{}\n{}\n{}\n{}",
canonical_querystring, canonical_headers, signed_headers, payload_hash
);
let canonical_request_hash = hex::encode(sha256_digest(canonical_request.as_bytes()));
let string_to_sign = format!("{}\n{}", ALGORITHM, canonical_request_hash);
let signature = hex::encode(hmac_sha256(
self.secret_key.as_bytes(),
string_to_sign.as_bytes(),
));
let authorization = format!(
"{} Credential={},SignedHeaders={},Signature={}",
ALGORITHM, self.access_key, signed_headers, signature
);
let mut request = self
.client
.get(url)
.with_header("Authorization", authorization)
.with_header("Host", self.host.clone())
.with_header("x-acs-action", action_from_params(¶ms))
.with_header("x-acs-content-sha256", payload_hash)
.with_header("x-acs-date", amz_date)
.with_header("x-acs-signature-nonce", nonce)
.with_header("x-acs-version", API_VERSION);
if let Some(token) = &self.security_token {
request = request.with_header("x-acs-security-token", token.clone());
}
let raw = request.send_raw().await?;
if let Ok(error) = serde_json::from_str::<ApiError>(&raw)
&& !error.code.is_empty()
{
return Err(Error::Api(format!(
"Alidns error {}: {}",
error.code, error.message
)));
}
Ok(raw)
}
}
fn action_from_params(params: &[(String, String)]) -> String {
params
.iter()
.find(|(k, _)| k == "Action")
.map(|(_, v)| v.clone())
.unwrap_or_default()
}
fn percent_encode(input: &str) -> String {
let mut out = String::with_capacity(input.len());
for byte in input.as_bytes() {
match *byte {
b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9' | b'-' | b'_' | b'.' | b'~' => {
out.push(*byte as char);
}
other => {
out.push('%');
out.push_str(&format!("{:02X}", other));
}
}
}
out
}
#[derive(Debug, Clone)]
struct ListedRrsetRecord {
record_id: String,
value: String,
#[allow(dead_code)]
ttl: u32,
priority: Option<u16>,
}
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 build_alidns_records(records: Vec<DnsRecord>) -> crate::Result<Vec<AlidnsRecord>> {
let mut out = Vec::with_capacity(records.len());
for r in records {
out.push(AlidnsRecord::try_from(r)?);
}
Ok(out)
}
fn record_from_listed(
record_type: DnsRecordType,
listed: &ListedRrsetRecord,
) -> crate::Result<DnsRecord> {
match record_type {
DnsRecordType::A => {
listed.value.parse().map(DnsRecord::A).map_err(|e| {
Error::Parse(format!("Invalid A record value '{}': {}", listed.value, e))
})
}
DnsRecordType::AAAA => listed.value.parse().map(DnsRecord::AAAA).map_err(|e| {
Error::Parse(format!(
"Invalid AAAA record value '{}': {}",
listed.value, e
))
}),
DnsRecordType::CNAME => Ok(DnsRecord::CNAME(listed.value.clone())),
DnsRecordType::NS => Ok(DnsRecord::NS(listed.value.clone())),
DnsRecordType::TXT => Ok(DnsRecord::TXT(listed.value.clone())),
DnsRecordType::MX => Ok(DnsRecord::MX(MXRecord {
exchange: listed.value.clone(),
priority: listed.priority.unwrap_or(0),
})),
DnsRecordType::SRV => parse_srv_value(&listed.value).map(DnsRecord::SRV),
DnsRecordType::CAA => parse_caa_value(&listed.value).map(DnsRecord::CAA),
DnsRecordType::TLSA => Err(Error::Unsupported(
"TLSA records are not supported by Alibaba Cloud DNS".to_string(),
)),
}
}
fn parse_srv_value(value: &str) -> crate::Result<SRVRecord> {
let parts: Vec<&str> = value.split_whitespace().collect();
if parts.len() != 4 {
return Err(Error::Parse(format!(
"Invalid SRV record value '{}': expected 4 fields",
value
)));
}
let priority = parts[0]
.parse::<u16>()
.map_err(|e| Error::Parse(format!("Invalid SRV priority '{}': {}", parts[0], e)))?;
let weight = parts[1]
.parse::<u16>()
.map_err(|e| Error::Parse(format!("Invalid SRV weight '{}': {}", parts[1], e)))?;
let port = parts[2]
.parse::<u16>()
.map_err(|e| Error::Parse(format!("Invalid SRV port '{}': {}", parts[2], e)))?;
Ok(SRVRecord {
priority,
weight,
port,
target: parts[3].to_string(),
})
}
fn parse_caa_value(value: &str) -> crate::Result<CAARecord> {
let trimmed = value.trim();
let (flags_str, rest) = trimmed.split_once(char::is_whitespace).ok_or_else(|| {
Error::Parse(format!("Invalid CAA record value '{}': missing tag", value))
})?;
let flags: u8 = flags_str
.parse()
.map_err(|e| Error::Parse(format!("Invalid CAA flags '{}': {}", flags_str, e)))?;
let rest = rest.trim_start();
let (tag, raw_value) = rest.split_once(char::is_whitespace).ok_or_else(|| {
Error::Parse(format!(
"Invalid CAA record value '{}': missing value",
value
))
})?;
let raw_value = raw_value.trim();
let unquoted = raw_value
.strip_prefix('"')
.and_then(|s| s.strip_suffix('"'))
.unwrap_or(raw_value);
let issuer_critical = flags & 0x80 != 0;
match tag.to_ascii_lowercase().as_str() {
"issue" => Ok(CAARecord::Issue {
issuer_critical,
name: parse_caa_name_and_options(unquoted).0,
options: parse_caa_name_and_options(unquoted).1,
}),
"issuewild" => Ok(CAARecord::IssueWild {
issuer_critical,
name: parse_caa_name_and_options(unquoted).0,
options: parse_caa_name_and_options(unquoted).1,
}),
"iodef" => Ok(CAARecord::Iodef {
issuer_critical,
url: unquoted.to_string(),
}),
other => Err(Error::Parse(format!("Unknown CAA tag '{}'", other))),
}
}
fn parse_caa_name_and_options(unquoted: &str) -> (Option<String>, Vec<KeyValue>) {
let mut parts = unquoted.split(';');
let name_part = parts.next().unwrap_or("").trim();
let name = if name_part.is_empty() {
None
} else {
Some(name_part.to_string())
};
let options = parts
.map(|p| p.trim())
.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.to_string(),
value: String::new(),
},
})
.collect();
(name, options)
}
#[derive(Debug)]
pub(crate) struct AlidnsRecord {
pub record_type: String,
pub value: String,
pub priority: Option<u16>,
}
impl TryFrom<DnsRecord> for AlidnsRecord {
type Error = Error;
fn try_from(record: DnsRecord) -> Result<Self, Self::Error> {
match record {
DnsRecord::A(addr) => Ok(AlidnsRecord {
record_type: "A".to_string(),
value: addr.to_string(),
priority: None,
}),
DnsRecord::AAAA(addr) => Ok(AlidnsRecord {
record_type: "AAAA".to_string(),
value: addr.to_string(),
priority: None,
}),
DnsRecord::CNAME(target) => Ok(AlidnsRecord {
record_type: "CNAME".to_string(),
value: target.trim_end_matches('.').to_string(),
priority: None,
}),
DnsRecord::NS(target) => Ok(AlidnsRecord {
record_type: "NS".to_string(),
value: target.trim_end_matches('.').to_string(),
priority: None,
}),
DnsRecord::MX(mx) => Ok(AlidnsRecord {
record_type: "MX".to_string(),
value: mx.exchange.trim_end_matches('.').to_string(),
priority: Some(mx.priority),
}),
DnsRecord::TXT(text) => Ok(AlidnsRecord {
record_type: "TXT".to_string(),
value: text,
priority: None,
}),
DnsRecord::SRV(srv) => Ok(AlidnsRecord {
record_type: "SRV".to_string(),
value: format!(
"{} {} {} {}",
srv.priority,
srv.weight,
srv.port,
srv.target.trim_end_matches('.')
),
priority: None,
}),
DnsRecord::CAA(caa) => Ok(AlidnsRecord {
record_type: "CAA".to_string(),
value: caa.to_string(),
priority: None,
}),
DnsRecord::TLSA(_) => Err(Error::Unsupported(
"TLSA records are not supported by Alibaba Cloud DNS".to_string(),
)),
}
}
}