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fix(transport-smtp): Fix transparency codec (#627)

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It fails to add transparency when a period is preceded by two
successive CRLF.

Co-authored-by: Paolo Barbolini <paolo@paolo565.org>
This commit is contained in:
Alexis Mousset
2021-05-22 19:41:29 +02:00
committed by GitHub
parent 1d8249165c
commit b0e2fc9bca
1 changed files with 11 additions and 2 deletions
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13
src/transport/smtp/client/mod.rs
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@@ -78,7 +78,15 @@ impl ClientCodec {
match self.escape_count {
0 => self.escape_count = if *byte == b'\r' { 1 } else { 0 },
1 => self.escape_count = if *byte == b'\n' { 2 } else { 0 },
2 => self.escape_count = if *byte == b'.' { 3 } else { 0 },
2 => {
self.escape_count = if *byte == b'.' {
3
} else if *byte == b'\r' {
1
} else {
0
}
}
_ => unreachable!(),
}
if self.escape_count == 3 {
@@ -111,6 +119,7 @@ mod test {
let mut buf: Vec<u8> = vec![];
codec.encode(b"test\r\n", &mut buf);
codec.encode(b"test\r\n\r\n", &mut buf);
codec.encode(b".\r\n", &mut buf);
codec.encode(b"\r\ntest", &mut buf);
codec.encode(b"te\r\n.\r\nst", &mut buf);
@@ -121,7 +130,7 @@ mod test {
codec.encode(b"test", &mut buf);
assert_eq!(
String::from_utf8(buf).unwrap(),
"test\r\n..\r\n\r\ntestte\r\n..\r\nsttesttest.test\n.test\ntest"
"test\r\ntest\r\n\r\n..\r\n\r\ntestte\r\n..\r\nsttesttest.test\n.test\ntest"
);
}