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Refactor openssl code one more time before rustls integration
Co-authored-by: Harald Gutmann <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,84 @@ | ||
| #[cfg(feature = "some_tls")] | ||
| // Copyright 2024 Cloudflare, Inc. | ||
| // | ||
| // 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. | ||
|
|
||
| #[cfg(feature = "openssl_derived")] | ||
| mod boringssl_openssl; | ||
|
|
||
| #[cfg(feature = "some_tls")] | ||
| #[cfg(feature = "openssl_derived")] | ||
| pub use boringssl_openssl::*; | ||
|
|
||
| /// OpenSSL considers underscores in hostnames non-compliant. | ||
| /// We replace the underscore in the leftmost label as we must support these | ||
| /// hostnames for wildcard matches and we have not patched OpenSSL. | ||
| /// | ||
| /// https://github.com/openssl/openssl/issues/12566 | ||
| /// | ||
| /// > The labels must follow the rules for ARPANET host names. They must | ||
| /// > start with a letter, end with a letter or digit, and have as interior | ||
| /// > characters only letters, digits, and hyphen. There are also some | ||
| /// > restrictions on the length. Labels must be 63 characters or less. | ||
| /// - https://datatracker.ietf.org/doc/html/rfc1034#section-3.5 | ||
| #[cfg(feature = "any_tls")] | ||
| pub fn replace_leftmost_underscore(sni: &str) -> Option<String> { | ||
| // wildcard is only leftmost label | ||
| if let Some((leftmost, rest)) = sni.split_once('.') { | ||
| // if not a subdomain or leftmost does not contain underscore return | ||
| if !rest.contains('.') || !leftmost.contains('_') { | ||
| return None; | ||
| } | ||
| // we have a subdomain, replace underscores | ||
| let leftmost = leftmost.replace('_', "-"); | ||
| return Some(format!("{leftmost}.{rest}")); | ||
| } | ||
| None | ||
| } | ||
|
|
||
| #[cfg(feature = "any_tls")] | ||
| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
|
|
||
| #[test] | ||
| fn test_replace_leftmost_underscore() { | ||
| let none_cases = [ | ||
| "", | ||
| "some", | ||
| "some.com", | ||
| "1.1.1.1:5050", | ||
| "dog.dot.com", | ||
| "dog.d_t.com", | ||
| "dog.dot.c_m", | ||
| "d_g.com", | ||
| "_", | ||
| "dog.c_m", | ||
| ]; | ||
|
|
||
| for case in none_cases { | ||
| assert!(replace_leftmost_underscore(case).is_none(), "{}", case); | ||
| } | ||
|
|
||
| assert_eq!( | ||
| Some("bb-b.some.com".to_string()), | ||
| replace_leftmost_underscore("bb_b.some.com") | ||
| ); | ||
| assert_eq!( | ||
| Some("a-a-a.some.com".to_string()), | ||
| replace_leftmost_underscore("a_a_a.some.com") | ||
| ); | ||
| assert_eq!( | ||
| Some("-.some.com".to_string()), | ||
| replace_leftmost_underscore("_.some.com") | ||
| ); | ||
| } | ||
| } |
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