feat(#289): add haveibeenpwned check (#1253)

backend/tests/check_email.rs

@@ -23,8 +23,8 @@ use reacher_backend::routes::create_routes;
 use warp::http::StatusCode;
 use warp::test::request;
 
-const FOO_BAR_RESPONSE: &str = r#"{"input":"foo@bar","is_reachable":"invalid","misc":{"is_disposable":false,"is_role_account":false,"gravatar_url":null},"mx":{"accepts_mail":false,"records":[]},"smtp":{"can_connect_smtp":false,"has_full_inbox":false,"is_catch_all":false,"is_deliverable":false,"is_disabled":false},"syntax":{"address":null,"domain":"","is_valid_syntax":false,"username":"","normalized_email":null,"suggestion":null}}"#;
-const FOO_BAR_BAZ_RESPONSE: &str = r#"{"input":"foo@bar.baz","is_reachable":"invalid","misc":{"is_disposable":false,"is_role_account":false,"gravatar_url":null},"mx":{"accepts_mail":false,"records":[]},"smtp":{"can_connect_smtp":false,"has_full_inbox":false,"is_catch_all":false,"is_deliverable":false,"is_disabled":false},"syntax":{"address":"foo@bar.baz","domain":"bar.baz","is_valid_syntax":true,"username":"foo","normalized_email":"foo@bar.baz","suggestion":null}}"#;
+const FOO_BAR_RESPONSE: &str = r#"{"input":"foo@bar","is_reachable":"invalid","misc":{"is_disposable":false,"is_role_account":false,"gravatar_url":null,"haveibeenpwned":null},"mx":{"accepts_mail":false,"records":[]},"smtp":{"can_connect_smtp":false,"has_full_inbox":false,"is_catch_all":false,"is_deliverable":false,"is_disabled":false},"syntax":{"address":null,"domain":"","is_valid_syntax":false,"username":"","normalized_email":null,"suggestion":null}}"#;
+const FOO_BAR_BAZ_RESPONSE: &str = r#"{"input":"foo@bar.baz","is_reachable":"invalid","misc":{"is_disposable":false,"is_role_account":false,"gravatar_url":null,"haveibeenpwned":null},"mx":{"accepts_mail":false,"records":[]},"smtp":{"can_connect_smtp":false,"has_full_inbox":false,"is_catch_all":false,"is_deliverable":false,"is_disabled":false},"syntax":{"address":"foo@bar.baz","domain":"bar.baz","is_valid_syntax":true,"username":"foo","normalized_email":"foo@bar.baz","suggestion":null}}"#;
 
 #[tokio::test]
 async fn test_input_foo_bar() {

cli/src/main.rs

@@ -77,6 +77,10 @@ pub struct Cli {
 	#[clap(long, env, default_value = "false", parse(try_from_str))]
 	pub check_gravatar: bool,
 
+	/// HaveIBeenPnwed API key, ignore if not provided.
+	#[clap(long, env, parse(try_from_str))]
+	pub haveibeenpwned_api_key: Option<String>,
+
 	/// The email to check.
 	pub to_email: String,
 }
@@ -99,7 +103,8 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
 		.set_gmail_use_api(CONF.gmail_use_api)
 		.set_microsoft365_use_api(CONF.microsoft365_use_api)
 		.set_check_gravatar(CONF.check_gravatar)
-		.set_hotmail_use_headless(CONF.hotmail_use_headless.clone());
+		.set_hotmail_use_headless(CONF.hotmail_use_headless.clone())
+		.set_haveibeenpwned_api_key(CONF.haveibeenpwned_api_key.clone());
 
 	if let Some(proxy_host) = &CONF.proxy_host {
 		input.set_proxy(CheckEmailInputProxy {

core/Cargo.toml

@@ -31,6 +31,7 @@ serde_json = "1.0.93"
 trust-dns-proto = "0.21.2"
 md5 = "0.7.0"
 levenshtein = "1.0.5"
+pwned = "0.5.0"
 
 [dev-dependencies]
 tokio = { version = "1.25.0" }

core/src/haveibeenpwned.rs

@@ -0,0 +1,55 @@
+// check-if-email-exists
+// Copyright (C) 2018-2022 Reacher
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+use crate::util::constants::LOG_TARGET;
+use pwned::api::PwnedBuilder;
+
+/// Check if the email has been found in any breach or paste using the
+/// HaveIBeenPwned API.
+/// This function will return the number of times the email has been found in
+/// any breach.
+pub async fn check_haveibeenpwned(to_email: &str, api_key: Option<String>) -> Option<bool> {
+	let pwned = PwnedBuilder::default()
+		.user_agent("reacher")
+		.api_key(api_key)
+		.build()
+		.unwrap();
+
+	match pwned.check_email(to_email).await {
+		Ok(answer) => {
+			log::debug!(
+				target: LOG_TARGET,
+				"Email found in {} breaches",
+				answer.len()
+			);
+			Some(!answer.is_empty())
+		}
+		Err(e) => {
+			log::error!(
+				target: LOG_TARGET,
+				"Error while checking if email has been pwned: {}",
+				e
+			);
+			match e {
+				pwned::errors::Error::IoError(e) => match e.kind() {
+					std::io::ErrorKind::NotFound => Some(false),
+					_ => None,
+				},
+				_ => None,
+			}
+		}
+	}
+}

core/src/lib.rs

@@ -62,6 +62,7 @@
 //! }
 //! ```
 
+mod haveibeenpwned;
 pub mod misc;
 pub mod mx;
 pub mod smtp;
@@ -177,7 +178,12 @@ pub async fn check_email(input: &CheckEmailInput) -> CheckEmailOutput {
 			.collect::<Vec<String>>()
 	);
 
-	let my_misc = check_misc(&my_syntax, input.check_gravatar).await;
+	let my_misc = check_misc(
+		&my_syntax,
+		input.check_gravatar,
+		input.haveibeenpwned_api_key.clone(),
+	)
+	.await;
 	log::debug!(
 		target: LOG_TARGET,
 		"[email={}] Found the following misc details: {:?}",

core/src/misc/mod.rs

@@ -15,6 +15,7 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 mod gravatar;
+use crate::haveibeenpwned::check_haveibeenpwned;
 
 use serde::{Deserialize, Serialize};
 use std::default::Default;
@@ -32,6 +33,9 @@ pub struct MiscDetails {
 	/// Is this email a role-based account?
 	pub is_role_account: bool,
 	pub gravatar_url: Option<String>,
+	/// Is this email address listed in the haveibeenpwned database for
+	/// previous breaches?
+	pub haveibeenpwned: Option<bool>,
 }
 
 /// Error occured connecting to this email server via SMTP. Right now this
@@ -42,7 +46,11 @@ pub struct MiscDetails {
 pub enum MiscError {}
 
 /// Fetch misc details about the email address, such as whether it's disposable.
-pub async fn check_misc(syntax: &SyntaxDetails, cfg_check_gravatar: bool) -> MiscDetails {
+pub async fn check_misc(
+	syntax: &SyntaxDetails,
+	cfg_check_gravatar: bool,
+	haveibeenpwned_api_key: Option<String>,
+) -> MiscDetails {
 	let role_accounts: Vec<&str> =
 		serde_json::from_str(ROLE_ACCOUNTS).expect("roles.json is a valid json. qed.");
 
@@ -58,12 +66,19 @@ pub async fn check_misc(syntax: &SyntaxDetails, cfg_check_gravatar: bool) -> Mis
 		gravatar_url = check_gravatar(address.as_ref()).await;
 	}
 
+	let mut haveibeenpwned: Option<bool> = None;
+
+	if haveibeenpwned_api_key.is_some() {
+		haveibeenpwned = check_haveibeenpwned(address.as_ref(), haveibeenpwned_api_key).await;
+	}
+
 	MiscDetails {
 		// mailchecker::is_valid checks also if the syntax is valid. But if
 		// we're here, it means we're sure the syntax is valid, so is_valid
 		// actually will only check if it's disposable.
 		is_disposable: !mailchecker::is_valid(address.as_ref()),
 		is_role_account: role_accounts.contains(&syntax.username.to_lowercase().as_ref()),
 		gravatar_url,
+		haveibeenpwned,
 	}
 }