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Jan-Erik Rediger 2018-02-07 09:15:21 +01:00
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_posts/2018-02-07-d-oh-dns-over-https-in-rust.md
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Last weekend I met [Daniel Stenberg][bagder], author of curl, at FOSDEM and we talked a bit about curl, Firefox and also Rust. Last weekend I met [Daniel Stenberg][bagder], author of curl, at FOSDEM and we talked a bit about curl, Firefox and also Rust.
One recent project he was working on was *DNS over HTTPS* [support for Firefox][firefox] and [eventually for curl][curl] as well. One recent project he was working on was *DNS over HTTPS* [support for Firefox][firefox] and [eventually for curl][curl] as well.
*DNS over HTTPS*, short *DOH*, is a recent idea to do DNS queries over HTTPS for privacy, performance and security reasons. There's a [RFC draft in version 3][draft03][^1] at the IETF describing it in more detail. *DNS over HTTPS*, short *DOH*, is a recent idea to do DNS queries over HTTPS for privacy, performance and security reasons. There's an [RFC draft in version 3][draft03][^1] at the IETF describing it in more detail.
The *tl;dr*: Send the DNS protocol in a HTTP POST request or base64-encoded in a GET request, The *tl;dr*: Send the DNS protocol in an HTTP POST request or base64-encoded in a GET request,
get back the DNS protocol in the response body and parse it. get back the DNS protocol in the response body and parse it.
Given how simple that sounds, I decided to implement a minimal DOH client in Rust. Given how simple that sounds, I decided to implement a minimal DOH client in Rust.