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Mask login tokens with UTF-8 safe slicing #387

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Mask login tokens with UTF-8 safe slicing #387

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20 changes: 17 additions & 3 deletions src/cortex-login/src/utils.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,11 +5,13 @@ use std::path::Path;

/// Mask an API key for safe display.
pub fn safe_format_key(key: &str) -> String {
if key.len() <= 13 {
let char_count = key.chars().count();
if char_count <= 13 {
return "***".to_string();
}
let prefix = &key[..8];
let suffix = &key[key.len() - 5..];

let prefix: String = key.chars().take(8).collect();
let suffix: String = key.chars().skip(char_count - 5).collect();
format!("{prefix}***{suffix}")
}

Expand Down Expand Up @@ -46,4 +48,16 @@ mod tests {
let key = "sk-proj-12345";
assert_eq!(safe_format_key(key), "***");
}

#[test]
fn test_safe_format_key_non_ascii_boundary() {
let key = "aaaaaaaéaaaaa";
assert_eq!(safe_format_key(key), "***");
}

#[test]
fn test_safe_format_key_long_non_ascii() {
let key = "sk-proj-ééééééé-token";
assert_eq!(safe_format_key(key), "sk-proj-***token");
}
}