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util: move reading secret file into seperate helper

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this patch moves the logic to read a secret file (and check for correct
permissions) from `secret_from_file` into a new `read_secret_file`
helper.
This commit is contained in:
networkException 2023-10-19 03:29:48 +02:00
parent 5feb6a1f64
commit c99cb58d71
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GPG key ID: E3877443AE684391
1 changed files with 19 additions and 16 deletions
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35
src/util/config.rs
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@ -238,6 +238,24 @@ pub fn read_config(config_file: PathBuf) -> Result<Config, Error> {
Ok(parsed_config)
}
pub fn read_secret_file(file_path: &String) -> Result<String, Error> {
#[cfg(unix)]
if std::env::var("GARAGE_ALLOW_WORLD_READABLE_SECRETS").as_deref() != Ok("true") {
use std::os::unix::fs::MetadataExt;
let metadata = std::fs::metadata(file_path)?;
if metadata.mode() & 0o077 != 0 {
return Err(format!("File {} is world-readable! (mode: 0{:o}, expected 0600)\nRefusing to start until this is fixed, or environment variable GARAGE_ALLOW_WORLD_READABLE_SECRETS is set to true.", file_path, metadata.mode()).into());
}
}
let mut file = std::fs::OpenOptions::new().read(true).open(file_path)?;
let mut secret_buf = String::new();
file.read_to_string(&mut secret_buf)?;
// trim_end: allows for use case such as `echo "$(openssl rand -hex 32)" > somefile`.
// also editors sometimes add a trailing newline
Ok(String::from(secret_buf.trim_end()))
}
fn secret_from_file(
secret: &mut Option<String>,
secret_file: &Option<String>,
@ -250,22 +268,7 @@ fn secret_from_file(
(Some(_), Some(_)) => {
return Err(format!("only one of `{}` and `{}_file` can be set", name, name).into());
}
(None, Some(file_path)) => {
#[cfg(unix)]
if std::env::var("GARAGE_ALLOW_WORLD_READABLE_SECRETS").as_deref() != Ok("true") {
use std::os::unix::fs::MetadataExt;
let metadata = std::fs::metadata(file_path)?;
if metadata.mode() & 0o077 != 0 {
return Err(format!("File {} is world-readable! (mode: 0{:o}, expected 0600)\nRefusing to start until this is fixed, or environment variable GARAGE_ALLOW_WORLD_READABLE_SECRETS is set to true.", file_path, metadata.mode()).into());
}
}
let mut file = std::fs::OpenOptions::new().read(true).open(file_path)?;
let mut secret_buf = String::new();
file.read_to_string(&mut secret_buf)?;
// trim_end: allows for use case such as `echo "$(openssl rand -hex 32)" > somefile`.
// also editors sometimes add a trailing newline
*secret = Some(String::from(secret_buf.trim_end()));
}
(None, Some(file_path)) => *secret = Some(read_secret_file(file_path)?),
}
Ok(())
}