From 4cade3f5bea1a10ae19fb318229b903ba012fe49 Mon Sep 17 00:00:00 2001 From: ComplexSpaces Date: Wed, 8 Nov 2023 00:34:26 -0600 Subject: [PATCH] Allow additionally parsing \r newlines in PEM files --- src/pemfile.rs | 39 ++++++++++++++++++++++++++++- tests/data/mixed-line-endings.crt | 41 +++++++++++++++++++++++++++++++ tests/integration.rs | 34 +++++++++++++++++++++++++ 3 files changed, 113 insertions(+), 1 deletion(-) create mode 100644 tests/data/mixed-line-endings.crt diff --git a/src/pemfile.rs b/src/pemfile.rs index 10e5deb..476f220 100644 --- a/src/pemfile.rs +++ b/src/pemfile.rs @@ -51,7 +51,7 @@ pub fn read_one(rd: &mut dyn io::BufRead) -> Result, io::Error> { loop { line.clear(); - let len = rd.read_until(b'\n', &mut line)?; + let len = read_until_newline(rd, &mut line)?; if len == 0 { // EOF @@ -132,6 +132,43 @@ pub fn read_one(rd: &mut dyn io::BufRead) -> Result, io::Error> { } } +// Ported from https://github.com/rust-lang/rust/blob/91cfcb021935853caa06698b759c293c09d1e96a/library/std/src/io/mod.rs#L1990 and +// modified to look for our accepted newlines. +fn read_until_newline( + r: &mut R, + buf: &mut Vec, +) -> std::io::Result { + let mut read = 0; + loop { + let (done, used) = { + let available = match r.fill_buf() { + Ok(n) => n, + Err(ref e) if e.kind() == ErrorKind::Interrupted => continue, + Err(e) => return Err(e), + }; + match available + .iter() + .copied() + .position(|b| b == b'\n' || b == b'\r') + { + Some(i) => { + buf.extend_from_slice(&available[..=i]); + (true, i + 1) + } + None => { + buf.extend_from_slice(available); + (false, available.len()) + } + } + }; + r.consume(used); + read += used; + if done || used == 0 { + return Ok(read); + } + } +} + /// Extract and return all PEM sections by reading `rd`. pub fn read_all(rd: &mut dyn io::BufRead) -> impl Iterator> + '_ { iter::from_fn(move || read_one(rd).transpose()) diff --git a/tests/data/mixed-line-endings.crt b/tests/data/mixed-line-endings.crt new file mode 100644 index 0000000..6a82253 --- /dev/null +++ b/tests/data/mixed-line-endings.crt @@ -0,0 +1,41 @@ +-----BEGIN CERTIFICATE----- +MIIDQTCCAimgAwIBAgITBmyfz5m/jAo54vB4ikPmljZbyjANBgkqhkiG9w0BAQsF +ADA5MQswCQYDVQQGEwJVUzEPMA0GA1UEChMGQW1hem9uMRkwFwYDVQQDExBBbWF6 +b24gUm9vdCBDQSAxMB4XDTE1MDUyNjAwMDAwMFoXDTM4MDExNzAwMDAwMFowOTEL +MAkGA1UEBhMCVVMxDzANBgNVBAoTBkFtYXpvbjEZMBcGA1UEAxMQQW1hem9uIFJv +b3QgQ0EgMTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBALJ4gHHKeNXj +ca9HgFB0fW7Y14h29Jlo91ghYPl0hAEvrAIthtOgQ3pOsqTQNroBvo3bSMgHFzZM +9O6II8c+6zf1tRn4SWiw3te5djgdYZ6k/oI2peVKVuRF4fn9tBb6dNqcmzU5L/qw +IFAGbHrQgLKm+a/sRxmPUDgH3KKHOVj4utWp+UhnMJbulHheb4mjUcAwhmahRWa6 +VOujw5H5SNz/0egwLX0tdHA114gk957EWW67c4cX8jJGKLhD+rcdqsq08p8kDi1L +93FcXmn/6pUCyziKrlA4b9v7LWIbxcceVOF34GfID5yHI9Y/QCB/IIDEgEw+OyQm +jgSubJrIqg0CAwEAAaNCMEAwDwYDVR0TAQH/BAUwAwEB/zAOBgNVHQ8BAf8EBAMC 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contained_other_ending = true; + } + } + assert!(contained_unix_ending); + assert!(contained_other_ending); + + let mut reader = BufReader::new(&data[..]); + + let items = rustls_pemfile::read_all(&mut reader) + .collect::, _>>() + .unwrap(); + + assert_eq!(items.len(), 4); + for cert in items { + assert!(matches!(cert, rustls_pemfile::Item::X509Certificate(_))); + } +}