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Merge branch 'release/0.1.0'

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Valentin Brandl 2018-07-15 19:31:01 +02:00
commit 99fd52adc3
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GPG Key ID: CAD4DA1A789125F9
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/target
**/*.rs.bk

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sudo: required
services:
- docker
script:
- docker run --rm -it -v "$(pwd)":/home/rust/src ekidd/rust-musl-builder sh -c 'sudo chown -R rust . && cargo test && cargo build --release'
before_deploy:
- ./ci/before_deploy.sh
deploy:
provider: releases
api_key:
secure: "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"
file_glob: true
file:
- deploy/*
skip_cleanup: true
on:
tags: true

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[workspace]
members = [ "server", "client", "data", "crypto" ]
[profile.release]
lto = true

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@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2018 Valentin Brandl
Permission is hereby granted, free of charge, to any person obtaining a copy
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SOFTWARE.

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# BIND9 API
This is an attempt to implement an API to create, update or delete DNS records
on a BIND9 DNS server.
## Server
The server will wait for incoming requests and uses the `nsupdate` command to
perform operations on the BIND9 nameserver. For the server to work, a DNS key is
needed to perform the updates.
```
$ dnssec-keygen -r /dev/urandom -a HMAC-SHA256 -b 256 -n HOST dnskey
```
Copy the `Key` section of the resulting `Kdnskey*.private` file into a file that
looks like this:
```
key "dns-key" {
algorithm hmac-sha256;
secret "<your secret>";
}
```
And extend the zone section of the zones you'd like to modify in your
`named.conf.local`
```
zone "example.com" {
type master;
file "/var/lib/bind/db.example.com";
...
allow-update { key "dns-key"; };
...
}
```
Now you can start the server:
```
$ ./bind9-api -k <path to dnskey> -t <your api token>
```
By default, the server will bind to `0.0.0.0:8000`. The host and port to bind
to, can be changed using the `-h` and `-p` flags respectively. For production
use, you should bind to a private IP address (LAN or VLAN) or to `127.0.0.1` and
put the server behind a reverse proxy that offers TLS.
## Client
The client is used to perform changes to the DNS zone from any server. My use
case is to perform LetsEncrypt DNS challenges. The client will look for a
configuration file in `/etc/bind9apiclient.toml` which looks like this:
```
# API server host
host = "http://127.0.0.1:8080"
# API secret
secret = "topsecret"
```
The client can perform two operations: Creating/updating and deleting DNS
records. The client is invoked like this
```
$ ./bind9-api-client -d foo.example.com -r TXT update -v foobar
$ ./bind9-api-client -d foo.example.com -r TXT delete
```
## API Description
```
POST /record
X-Api-Token: <api-token>
{
"name": "foo.example.com",
"value": "127.0.0.1",
"record": "A",
"ttl": 1337
}
```
```
DELETE /record
X-Api-Token: <api-token>
{
"name": "foo.example.com",
"record": "A"
}
```
The API token is a SHA256 HMAC over the request body using a pre-shared secret.
### Security Considerations
The current API design does not migrate replay attacks. An attacker that is able
to intercept a request to the API can resend the same request again to execute
the same operation. To prevent these kinds of attacks, you should use a reverse
proxy and encrypt the connections using TLS. Future versions of the server might
provide TLS functionality by itself.
## Usage with LetsEncrypt
In `letsencrypt/`, two example scripts can be found to use the client as a
certbot hook for DNS challenges. It assumes that the client is located somewhere
in `$PATH` and that the configurations file exists.
## License
This project is licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or
http://opensource.org/licenses/MIT)
at your option.

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#!/usr/bin/env bash
set -ex
main() {
local src=$(pwd) \
stage=$src/deploy
mkdir -p $deploy
test -f Cargo.lock || cargo generate-lockfile
cp target/x86_64-unknown-linux-musl/release/bind9-api $stage/bind9-api-${TRAVIS-TAG:1}-x86_64-musl
cp target/x86_64-unknown-linux-musl/release/bind9-api-client $stage/bind9-api-client-${TRAVIS-TAG:1}-x86_64-musl
}

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"checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
"checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
"checksum toml 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "a0263c6c02c4db6c8f7681f9fd35e90de799ebd4cfdeab77a38f4ff6b3d8c0d9"
"checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
"checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
"checksum winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "773ef9dcc5f24b7d850d0ff101e542ff24c3b090a9768e03ff889fdef41f00fd"
"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

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[package]
name = "bind9-api-client"
version = "0.1.0"
authors = ["Valentin Brandl <vbrandl@riseup.net>"]
description = "Client for the BIND9 API"
license = "MIT/Apache-2.0"
[dependencies]
clap = "2.32.0"
crypto = { path = "../crypto" }
data = { path = "../data" }
failure = "0.1.1"
hyper = "0.11"
log = "0.4.3"
openssl-probe = "0.1.2"
pretty_env_logger = "0.2.3"
reqwest = "0.8.6"
serde = "1.0.69"
serde_derive = "1.0.69"
serde_json = "1.0.22"
toml = "0.4.6"

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// Copyright (c) 2018 Brandl, Valentin <mail+rust@vbrandl.net>
// Author: Brandl, Valentin <mail+rust@vbrandl.net>
//
// Licensed unter the Apache License, Version 2.0 or the MIT license, at your
// option.
//
// ********************************************************************************
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ********************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
pub fn parse_cli() -> ::clap::ArgMatches<'static> {
clap_app!(bind9_api_client =>
(version: crate_version!())
(author: crate_authors!())
(about: crate_description!())
(@arg CONFIG: -c --config +takes_value "Path to config file (Defaults to /etc/bind9apiclient.toml)")
(@arg DOMAIN: -d --domain +takes_value +required "Domain to create")
(@arg RECORD: -r --record +takes_value "The record type (Defaults to TXT)")
(@subcommand update =>
(about: "Creates a new record")
(@arg VALUE: -v --value +takes_value +required "Value to write in the record")
(@arg TTL: -t --ttl + takes_value "TTL of the record (Defaults to 8640)")
)
(@subcommand delete =>
(about: "Deletes a record")
)
).get_matches()
}

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// Copyright (c) 2018 Brandl, Valentin <mail+rust@vbrandl.net>
// Author: Brandl, Valentin <mail+rust@vbrandl.net>
//
// Licensed unter the Apache License, Version 2.0 or the MIT license, at your
// option.
//
// ********************************************************************************
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ********************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#[macro_use]
extern crate clap;
extern crate crypto;
extern crate data;
extern crate failure;
#[macro_use]
extern crate hyper;
#[macro_use]
extern crate log;
extern crate openssl_probe;
extern crate pretty_env_logger;
extern crate reqwest;
extern crate serde;
extern crate toml;
#[macro_use]
extern crate serde_derive;
extern crate serde_json;
mod cli;
use failure::Error;
use data::{ApiError, Delete, Record, Update};
use std::borrow::Cow;
type Result<T> = std::result::Result<T, Error>;
header! { (XApiToken, data::TOKEN_HEADER) => [String] }
#[derive(Eq, PartialEq, Clone, Copy)]
enum Method {
POST,
DELETE,
}
#[derive(Deserialize)]
struct Config<'a> {
#[serde(borrow)]
host: Cow<'a, str>,
#[serde(borrow)]
secret: Cow<'a, str>,
}
fn delete(config: &Config, record: Record, domain: &str) -> Result<()> {
let delete = Delete::new(domain.to_owned(), record);
let res = call_api(config, delete, Method::DELETE)?;
if res.status().is_success() {
Ok(())
} else {
Err(ApiError::RequestError.into())
}
}
fn update(config: &Config, record: Record, domain: &str, value: &str, ttl: u32) -> Result<()> {
let update = Update::new(domain.to_owned(), value.to_owned(), record, ttl);
let res = call_api(config, update, Method::POST)?;
if res.status().is_success() {
Ok(())
} else {
Err(ApiError::RequestError.into())
}
}
fn call_api<D: serde::Serialize>(
config: &Config,
data: D,
method: Method,
) -> Result<reqwest::Response> {
let data_s = serde_json::to_string(&data)?;
info!("body: {}", data_s);
let signature = crypto::sign(config.secret.as_bytes(), data_s.as_bytes());
let signature = crypto::bytes_to_hex_str(&signature)?;
let client = reqwest::Client::new();
let url = format!("{}/record", config.host);
Ok(if method == Method::POST {
client.post(&url)
} else {
client.delete(&url)
}.header(XApiToken(signature))
.json(&data)
.send()?)
}
fn main() -> Result<()> {
openssl_probe::init_ssl_cert_env_vars();
std::env::set_var("RUST_LOG", "info");
pretty_env_logger::init();
let matches = cli::parse_cli();
let record: Record = matches
.value_of("RECORD")
.unwrap_or("TXT")
.parse()
.expect("Invalid record type");
let domain = matches.value_of("DOMAIN").unwrap();
let config_path = matches
.value_of("CONFIG")
.unwrap_or("/etc/bind9apiclient.toml");
let config = std::fs::read_to_string(config_path).expect("Cannot read config file");
let config: Config = toml::from_str(&config).expect("Cannot parse config file");
if let Some(matches) = matches.subcommand_matches("update") {
let ttl = matches
.value_of("TTL")
.unwrap_or("8640")
.parse()
.expect("Cannot parse TTL");
update(
&config,
record,
domain,
matches.value_of("VALUE").unwrap(),
ttl,
)?;
} else if matches.subcommand_matches("delete").is_some() {
delete(&config, record, domain)?;
}
Ok(())
}

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[package]
name = "crypto"
version = "0.1.0"
authors = ["Valentin Brandl <vbrandl@riseup.net>"]
license = "MIT/Apache-2.0"
[dependencies]
failure = "0.1.1"
hex = "0.3.2"
ring = "0.12.1"
[dev-dependencies]
proptest = "0.8.1"

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// Copyright (c) 2018 Brandl, Valentin <mail+rust@vbrandl.net>
// Author: Brandl, Valentin <mail+rust@vbrandl.net>
//
// Licensed unter the Apache License, Version 2.0 or the MIT license, at your
// option.
//
// ********************************************************************************
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ********************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#![deny(missing_docs)]
//! Helper crate for cryptographic operations.
extern crate failure;
extern crate hex;
extern crate ring;
#[cfg(test)]
#[macro_use]
extern crate proptest;
use failure::Error;
use hex::{FromHex, ToHex};
use ring::{digest, hmac};
type Result<T> = std::result::Result<T, Error>;
/// Converts a byte slice to a lowercase hex string.
pub fn bytes_to_hex_str(bytes: &[u8]) -> Result<String> {
let mut output = String::new();
bytes.write_hex(&mut output)?;
Ok(output)
}
/// Converts a hey string to a vec of bytes.
pub fn hex_str_to_bytes(hex_str: &str) -> Result<Vec<u8>> {
Ok(Vec::from_hex(hex_str)?)
}
/// Verifies a HMAC SHA256 signature.
pub fn verify_signature(key: &[u8], msg: &[u8], signature: &[u8]) -> bool {
let key = hmac::VerificationKey::new(&digest::SHA256, key);
hmac::verify(&key, msg, signature)
.map(|_| true)
.unwrap_or(false)
}
/// Creates a HMAC SHA256 signature.
pub fn sign(key: &[u8], msg: &[u8]) -> Vec<u8> {
let key = hmac::SigningKey::new(&digest::SHA256, key);
let signature = hmac::sign(&key, msg);
signature.as_ref().into_iter().cloned().collect()
}
#[cfg(test)]
mod tests {
use super::*;
proptest! {
#[test]
fn sign_verify(key: Vec<u8>, msg: Vec<u8>) {
let sig = sign(&key, &msg);
assert!(verify_signature(&key, &msg, &sig));
}
}
proptest! {
#[test]
fn to_from_hex(data: Vec<u8>) {
assert_eq!(hex_str_to_bytes(&bytes_to_hex_str(&data).unwrap()).unwrap(), data);
}
}
}

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[package]
name = "data"
version = "0.1.0"
authors = ["Valentin Brandl <vbrandl@riseup.net>"]
license = "MIT/Apache-2.0"
[dependencies]
failure = "0.1.1"
serde = "1.0.69"
serde_derive = "1.0.69"

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// Copyright (c) 2018 Brandl, Valentin <mail+rust@vbrandl.net>
// Author: Brandl, Valentin <mail+rust@vbrandl.net>
//
// Licensed unter the Apache License, Version 2.0 or the MIT license, at your
// option.
//
// ********************************************************************************
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ********************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#![deny(missing_docs)]
//! This crate provides definitions for shared types between the client and the server
#[macro_use]
extern crate failure;
#[macro_use]
extern crate serde_derive;
/// The name of the API token header: `X-Api-Token`
pub const TOKEN_HEADER: &str = "X-Api-Token";
/// Enumeration of DNS record types
#[derive(Eq, PartialEq, Deserialize, Serialize, Debug, Clone, Copy)]
pub enum Record {
/// A record
A,
/// AAAA record
AAAA,
/// AFSDB record
AFSDB,
/// APL record
APL,
/// CAA record
CAA,
/// CDNSKEY record
CDNSKEY,
/// CDS record
CDS,
/// CERT record
CERT,
/// CNAME record
CNAME,
/// DHCID record
DHCID,
/// DLV record
DLV,
/// DNAME record
DNAME,
/// DNSKEY record
DNSKEY,
/// DS record
DS,
/// HIP record
HIP,
/// IPSECKEY record
IPSECKEY,
/// KEY record
KEY,
/// KX record
KX,
/// LOC record
LOC,
/// MX record
MX,
/// NAPTR record
NAPTR,
/// NS record
NS,
/// NSEC record
NSEC,
/// NSEC3 record
NSEC3,
/// NSEC3PARAM record
NSEC3PARAM,
/// OPENPGPKEY record
OPENPGPKEY,
/// PTR record
PTR,
/// RRSIG record
RRSIG,
/// RP record
RP,
/// SIG record
SIG,
/// SOA record
SOA,
/// SRV record
SRV,
/// SSHFP record
SSHFP,
/// TA record
TA,
/// TKEY record
TKEY,
/// TLSA record
TLSA,
/// TSIG record
TSIG,
/// TXT record
TXT,
/// URI record
URI,
/// ALIAS record
ALIAS,
}
/// Error types that the API can yield
#[derive(Debug, Fail)]
pub enum ApiError {
/// Error while parsing a DNS record
#[fail(display = "Parse record error")]
ParseRecord,
/// Error while handling a request
#[fail(display = "API Error")]
RequestError,
}
impl std::str::FromStr for Record {
type Err = ApiError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"A" | "a" => Ok(Record::A),
"AAAA" | "aaaa" => Ok(Record::AAAA),
"AFSDB" | "afsdb" => Ok(Record::AFSDB),
"APL" | "apl" => Ok(Record::APL),
"CAA" | "caa" => Ok(Record::CAA),
"CDNSKEY" | "cdnskey" => Ok(Record::CDNSKEY),
"CDS" | "cds" => Ok(Record::CDS),
"CERT" | "cert" => Ok(Record::CERT),
"CNAME" | "cname" => Ok(Record::CNAME),
"DHCID" | "dhcid" => Ok(Record::DHCID),
"DLV" | "dlv" => Ok(Record::DLV),
"DNAME" | "dname" => Ok(Record::DNAME),
"DNSKEY" | "dnskey" => Ok(Record::DNSKEY),
"DS" | "ds" => Ok(Record::DS),
"HIP" | "hip" => Ok(Record::HIP),
"IPSECKEY" | "ipseckey" => Ok(Record::IPSECKEY),
"KEY" | "key" => Ok(Record::KEY),
"KX" | "kx" => Ok(Record::KX),
"LOC" | "loc" => Ok(Record::LOC),
"MX" | "mx" => Ok(Record::MX),
"NAPTR" | "naptr" => Ok(Record::NAPTR),
"NS" | "ns" => Ok(Record::NS),
"NSEC" | "nsec" => Ok(Record::NSEC),
"NSEC3" | "nsec3" => Ok(Record::NSEC3),
"NSEC3PARAM" | "nsec3param" => Ok(Record::NSEC3PARAM),
"OPENPGPKEY" | "openpgpkey" => Ok(Record::OPENPGPKEY),
"PTR" | "ptr" => Ok(Record::PTR),
"RRSIG" | "rrsig" => Ok(Record::RRSIG),
"RP" | "rp" => Ok(Record::RP),
"SIG" | "sig" => Ok(Record::SIG),
"SOA" | "soa" => Ok(Record::SOA),
"SRV" | "srv" => Ok(Record::SRV),
"SSHFP" | "sshfp" => Ok(Record::SSHFP),
"TA" | "ta" => Ok(Record::TA),
"TKEY" | "tkey" => Ok(Record::TKEY),
"TLSA" | "tlsa" => Ok(Record::TLSA),
"TSIG" | "tsig" => Ok(Record::TSIG),
"TXT" | "txt" => Ok(Record::TXT),
"URI" | "uri" => Ok(Record::URI),
"ALIAS" | "alias" => Ok(Record::ALIAS),
_ => Err(ApiError::ParseRecord),
}
}
}
impl std::fmt::Display for Record {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(
f,
"{}",
match *self {
Record::A => "A",
Record::AAAA => "AAAA",
Record::AFSDB => "AFSDB",
Record::APL => "APL",
Record::CAA => "CAA",
Record::CDNSKEY => "CDNSKEY",
Record::CDS => "CDS",
Record::CERT => "CERT",
Record::CNAME => "CNAME",
Record::DHCID => "DHCID",
Record::DLV => "DLV",
Record::DNAME => "DNAME",
Record::DNSKEY => "DNSKEY",
Record::DS => "DS",
Record::HIP => "HIP",
Record::IPSECKEY => "IPSECKEY",
Record::KEY => "KEY",
Record::KX => "KX",
Record::LOC => "LOC",
Record::MX => "MX",
Record::NAPTR => "NAPTR",
Record::NS => "NS",
Record::NSEC => "NSEC",
Record::NSEC3 => "NSEC3",
Record::NSEC3PARAM => "NSEC3PARAM",
Record::OPENPGPKEY => "OPENPGPKEY",
Record::PTR => "PTR",
Record::RRSIG => "RRSIG",
Record::RP => "RP",
Record::SIG => "SIG",
Record::SOA => "SOA",
Record::SRV => "SRV",
Record::SSHFP => "SSHFP",
Record::TA => "TA",
Record::TKEY => "TKEY",
Record::TLSA => "TLSA",
Record::TSIG => "TSIG",
Record::TXT => "TXT",
Record::URI => "URI",
Record::ALIAS => "ALIAS",
}
)
}
}
/// Data for an update request containing the domain name, record type,
/// record value and TTL.
#[derive(Deserialize, Serialize)]
pub struct Update {
name: String,
value: String,
record: Record,
ttl: u32,
}
impl Update {
/// Creates a new Update object.
pub fn new(name: String, value: String, record: Record, ttl: u32) -> Self {
Self {
name,
value,
record,
ttl,
}
}
/// Returns a reference to the name field.
#[inline]
pub fn name(&self) -> &str {
&self.name
}
/// Returns a reference to the value field.
#[inline]
pub fn value(&self) -> &str {
&self.value
}
/// Returns the record field.
#[inline]
pub fn record(&self) -> Record {
self.record
}
/// Returns the TTL.
#[inline]
pub fn ttl(&self) -> u32 {
self.ttl
}
}
/// Data of a delete request, containing the domain name and record type.
#[derive(Deserialize, Serialize)]
pub struct Delete {
name: String,
record: Record,
}
impl Delete {
/// Creates a new Delete object.
pub fn new(name: String, record: Record) -> Self {
Self { name, record }
}
/// Returns a reference to the name field.
#[inline]
pub fn name(&self) -> &str {
&self.name
}
/// Returns the record type.
#[inline]
pub fn record(&self) -> Record {
self.record
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn parse_record() {
assert_eq!("a".parse::<Record>().unwrap(), Record::A);
assert_eq!("A".parse::<Record>().unwrap(), Record::A);
assert_eq!("aaaa".parse::<Record>().unwrap(), Record::AAAA);
assert_eq!("AAAA".parse::<Record>().unwrap(), Record::AAAA);
assert_eq!("txt".parse::<Record>().unwrap(), Record::TXT);
assert_eq!("TXT".parse::<Record>().unwrap(), Record::TXT);
assert_eq!("PTR".parse::<Record>().unwrap(), Record::PTR);
assert_eq!("ptr".parse::<Record>().unwrap(), Record::PTR);
assert!(!"aAaA".parse::<Record>().is_ok());
}
#[test]
fn record_to_str_and_parse_equals_input() {
assert!(validate_record_parsing(Record::A));
assert!(validate_record_parsing(Record::AAAA));
assert!(validate_record_parsing(Record::AFSDB));
assert!(validate_record_parsing(Record::APL));
assert!(validate_record_parsing(Record::CAA));
assert!(validate_record_parsing(Record::CDNSKEY));
assert!(validate_record_parsing(Record::CDS));
assert!(validate_record_parsing(Record::CERT));
assert!(validate_record_parsing(Record::CNAME));
assert!(validate_record_parsing(Record::DHCID));
assert!(validate_record_parsing(Record::DLV));
assert!(validate_record_parsing(Record::DNAME));
assert!(validate_record_parsing(Record::DNSKEY));
assert!(validate_record_parsing(Record::DS));
assert!(validate_record_parsing(Record::HIP));
assert!(validate_record_parsing(Record::IPSECKEY));
assert!(validate_record_parsing(Record::KEY));
assert!(validate_record_parsing(Record::KX));
assert!(validate_record_parsing(Record::LOC));
assert!(validate_record_parsing(Record::MX));
assert!(validate_record_parsing(Record::NAPTR));
assert!(validate_record_parsing(Record::NS));
assert!(validate_record_parsing(Record::NSEC));
assert!(validate_record_parsing(Record::NSEC3));
assert!(validate_record_parsing(Record::NSEC3PARAM));
assert!(validate_record_parsing(Record::OPENPGPKEY));
assert!(validate_record_parsing(Record::PTR));
assert!(validate_record_parsing(Record::RRSIG));
assert!(validate_record_parsing(Record::RP));
assert!(validate_record_parsing(Record::SIG));
assert!(validate_record_parsing(Record::SOA));
assert!(validate_record_parsing(Record::SRV));
assert!(validate_record_parsing(Record::SSHFP));
assert!(validate_record_parsing(Record::TA));
assert!(validate_record_parsing(Record::TKEY));
assert!(validate_record_parsing(Record::TLSA));
assert!(validate_record_parsing(Record::TSIG));
assert!(validate_record_parsing(Record::TXT));
assert!(validate_record_parsing(Record::URI));
assert!(validate_record_parsing(Record::ALIAS));
}
fn validate_record_parsing(record: Record) -> bool {
format!("{}", record).parse::<Record>().unwrap() == record
}
}

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#!/usr/bin/env sh
bind9-api-client -d "_acme-challenge.$CERTBOT_DOMAIN" -r TXT update -v "$CERTBOT_VALIDATION"

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#!/usr/bin/env sh
bind9-api-client -d "_acme-challenge.$CERTBOT_DOMAIN" -r TXT delete

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[package]
name = "bind9-api"
version = "0.1.0"
authors = ["Valentin Brandl <vbrandl@riseup.net>"]
description = "Web API to create, update and remove DNS entries in bind9"
license = "MIT/Apache-2.0"
[dependencies]
actix-web = "0.6.14"
clap = "2.31.2"
crypto = { path = "../crypto" }
data = { path = "../data" }
failure = "0.1.1"
futures = "0.1.21"
log = "0.4.3"
pretty_env_logger = "0.2.3"
serde = "1.0.69"
serde_json = "1.0.22"

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// Copyright (c) 2018 Brandl, Valentin <mail+rust@vbrandl.net>
// Author: Brandl, Valentin <mail+rust@vbrandl.net>
//
// Licensed unter the Apache License, Version 2.0 or the MIT license, at your
// option.
//
// ********************************************************************************
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ********************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
pub fn parse_args() -> ::clap::ArgMatches<'static> {
clap_app!(api =>
(version: crate_version!())
(author: crate_authors!())
(about: crate_description!())
(@arg TOKEN: -t --token +required +takes_value "Token to authenticate against the API")
(@arg CMD: -c --command +takes_value "Nsupdate command (Defaults to nsupdate)")
(@arg KEYPATH: -k --keypath +required +takes_value "Path to the DNS key")
(@arg OKMARK: -m --marker +takes_value "Marker to detect if a operation was successful")
(@arg PORT: -p --port +takes_value "Port to listen on (Defaults to 8000)")
(@arg HOST: -h --host +takes_value "Host to listen on (Defaults to 0.0.0.0)")
(@arg SERVER: -s --server +takes_value "Bind server (Defaults to 127.0.0.1)")
).get_matches()
}

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// Copyright (c) 2018 Brandl, Valentin <mail+rust@vbrandl.net>
// Author: Brandl, Valentin <mail+rust@vbrandl.net>
//
// Licensed unter the Apache License, Version 2.0 or the MIT license, at your
// option.
//
// ********************************************************************************
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ********************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
extern crate actix_web;
extern crate crypto;
extern crate data;
#[macro_use]
extern crate clap;
#[macro_use]
extern crate failure;
extern crate futures;
#[macro_use]
extern crate log;
extern crate pretty_env_logger;
extern crate serde;
extern crate serde_json;
mod cli;
mod util;
use actix_web::{
error::{self, ErrorInternalServerError}, http, middleware::Logger, server, App, Result, State,
};
use data::{Delete, Update};
use failure::Error;
use std::{
io::Write, process::{Command, Stdio}, sync::Arc,
};
use util::{Config, ExecuteError, Validated};
fn execute_nsupdate(input: &str, config: &Config) -> Result<String, Error> {
info!("executing update: {}", input);
let mut cmd = Command::new(config.command())
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.args(&["-k", config.key_path()])
.spawn()?;
{
let stdin = cmd.stdin.as_mut().ok_or(ExecuteError::Stdin)?;
stdin.write_all(input.as_bytes())?;
}
let output = cmd.wait_with_output()?.stdout;
let output = String::from_utf8(output)?;
info!("output: {}", output);
Ok(output)
}
fn delete(
(delete, state): (Validated<Delete>, State<Arc<Config>>),
) -> Result<&'static str, error::Error> {
info!("Deleting {} record for {}", delete.record(), delete.name());
let stdin = format!(
"server {}\nupdate delete {} {}\nsend\n",
state.server(),
delete.name(),
delete.record()
);
Ok(execute_nsupdate(&stdin, &state)
.map_err(|_| ErrorInternalServerError("Error executing nsupdate"))
.and_then(|s| {
if s.contains(state.ok_marker()) {
Ok("OK")
} else {
Err(ErrorInternalServerError("Marker not found"))
}
})?)
}
fn update(
(update, state): (Validated<Update>, State<Arc<Config>>),
) -> Result<&'static str, error::Error> {
info!(
"Updating {} record for {} with value \"{}\"",
update.record(),
update.name(),
update.value()
);
let stdin = format!(
"server {}\nupdate add {} {} {} {}\nsend\n",
state.server(),
update.name(),
update.ttl(),
update.record(),
update.value()
);
Ok(execute_nsupdate(&stdin, &state)
.map_err(|_| ErrorInternalServerError("Error executing nsupdate"))
.and_then(|s| {
if s.contains(state.ok_marker()) {
Ok("OK")
} else {
Err(ErrorInternalServerError("Marker not found"))
}
})?)
}
fn main() {
std::env::set_var("RUST_LOG", "info");
pretty_env_logger::init();
let matches = cli::parse_args();
let token = matches.value_of("TOKEN").unwrap().to_owned();
let command = matches.value_of("CMD").unwrap_or("nsupdate").to_owned();
let key_path = matches.value_of("KEYPATH").unwrap().to_owned();
let ok_marker = matches.value_of("OKMARK").unwrap_or("").to_owned();
let server = matches.value_of("SERVER").unwrap_or("127.0.0.1").to_owned();
let config = Arc::new(Config::new(token, command, key_path, ok_marker, server));
let port: u16 = matches
.value_of("PORT")
.unwrap_or("8000")
.parse()
.expect("Cannot parse port");
let host = matches.value_of("HOST").unwrap_or("0.0.0.0");
let host = format!("{}:{}", host, port);
server::new(move || {
App::with_state(config.clone())
.middleware(Logger::default())
.route("/record", http::Method::POST, update)
.route("/record", http::Method::DELETE, delete)
}).bind(host)
.unwrap()
.run();
}

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// Copyright (c) 2018 Brandl, Valentin <mail+rust@vbrandl.net>
// Author: Brandl, Valentin <mail+rust@vbrandl.net>
//
// Licensed unter the Apache License, Version 2.0 or the MIT license, at your
// option.
//
// ********************************************************************************
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ********************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use actix_web::{
error::{Error, ErrorInternalServerError, ErrorUnauthorized, JsonPayloadError, ParseError},
FromRequest, HttpMessage, HttpRequest, Result,
};
use futures::future::{err as FutErr, Future};
use std::{ops::Deref, sync::Arc};
#[derive(Debug, Fail)]
pub enum ExecuteError {
#[fail(display = "Stdin error")]
Stdin,
}
pub struct Config {
token: String,
command: String,
key_path: String,
ok_marker: String,
server: String,
}
impl Config {
pub fn new(
token: String,
command: String,
key_path: String,
ok_marker: String,
server: String,
) -> Self {
Self {
token,
command,
key_path,
ok_marker,
server,
}
}
#[inline]
pub fn token(&self) -> &str {
&self.token
}
#[inline]
pub fn command(&self) -> &str {
&self.command
}
#[inline]
pub fn key_path(&self) -> &str {
&self.key_path
}
#[inline]
pub fn ok_marker(&self) -> &str {
&self.ok_marker
}
#[inline]
pub fn server(&self) -> &str {
&self.server
}
}
pub struct Validated<T>(T);
impl<T: 'static + ::serde::de::DeserializeOwned> FromRequest<Arc<Config>> for Validated<T> {
type Config = ();
type Result = Box<Future<Item = Self, Error = Error>>;
fn from_request(req: &HttpRequest<Arc<Config>>, _: &Self::Config) -> Self::Result {
let state = req.state().clone();
let sig = extract_signature(&req);
if sig.is_err() {
return Box::new(FutErr(sig.unwrap_err()));
}
let sig = sig.unwrap();
Box::new(req.clone().body().from_err().and_then(move |body| {
if ::crypto::verify_signature(state.token().as_bytes(), &body, &sig) {
let delete: T = ::serde_json::from_slice(&body)
.map_err(|e| ErrorInternalServerError(JsonPayloadError::Deserialize(e)))?;
Ok(Validated(delete))
} else {
Err(ErrorUnauthorized(ParseError::Header))
}
}))
}
}
impl<T> Deref for Validated<T> {
type Target = T;
fn deref(&self) -> &T {
&self.0
}
}
fn extract_signature<S>(req: &HttpRequest<S>) -> Result<Vec<u8>> {
Ok(req.headers()
.get(::data::TOKEN_HEADER)
.as_ref()
.ok_or_else(|| ErrorUnauthorized(ParseError::Header))?
.to_str()
.map_err(ErrorUnauthorized)
.and_then(|s| {
::crypto::hex_str_to_bytes(s).map_err(|_| ErrorUnauthorized(ParseError::Header))
})
.map_err(ErrorUnauthorized)?)
}