47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
use crate::error::Error;
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pub fn validate(server_name: &str) -> Result<(), Error> {
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use std::net::Ipv6Addr;
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if server_name.is_empty() {
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return Err(Error::InvalidServerName);
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}
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let end_of_host = if server_name.starts_with('[') {
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let end_of_ipv6 = match server_name.find(']') {
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Some(idx) => idx,
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None => return Err(Error::InvalidServerName),
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};
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if server_name[1..end_of_ipv6].parse::<Ipv6Addr>().is_err() {
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return Err(Error::InvalidServerName);
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}
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end_of_ipv6 + 1
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} else {
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let end_of_host = server_name.find(':').unwrap_or_else(|| server_name.len());
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if server_name[..end_of_host]
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.bytes()
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.any(|byte| !(byte.is_ascii_alphanumeric() || byte == b'-' || byte == b'.'))
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{
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return Err(Error::InvalidServerName);
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}
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end_of_host
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};
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if server_name.len() != end_of_host
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&& (
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// hostname is followed by something other than ":port"
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server_name.as_bytes()[end_of_host] != b':'
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// the remaining characters after ':' are not a valid port
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|| server_name[end_of_host + 1..].parse::<u16>().is_err()
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)
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{
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Err(Error::InvalidServerName)
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} else {
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Ok(())
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}
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}
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