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fix: validate --cwd and --date for system-prompt (#99)

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--cwd now validates the path exists and is a directory before passing
it to the system prompt renderer. --date rejects values with newlines
or >20 chars to prevent prompt injection.

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Co-authored-by: Gajae Code <dev@gajae-code.com>
This commit is contained in:
bellman
2026-06-05 05:18:31 +09:00
parent b220366176
commit adf5bd165e
2 changed files with 25 additions and 1 deletions
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24
rust/crates/rusty-claude-cli/src/main.rs
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@@ -3131,6 +3131,17 @@ fn parse_system_prompt_args(
"missing_flag_value: missing value for --cwd.\nUsage: --cwd <path>".to_string()
})?;
cwd = PathBuf::from(value);
// #99: validate --cwd path exists and is a directory
if !cwd.exists() {
return Err(format!(
"invalid_cwd: path '{value}' does not exist.\nUsage: claw system-prompt --cwd <existing-directory>"
));
}
if !cwd.is_dir() {
return Err(format!(
"invalid_cwd: path '{value}' is not a directory.\nUsage: claw system-prompt --cwd <existing-directory>"
));
}
index += 2;
}
"--date" => {
@@ -3138,9 +3149,22 @@ fn parse_system_prompt_args(
"missing_flag_value: missing value for --date.\nUsage: --date <YYYY-MM-DD>"
.to_string()
})?;
// #99: validate --date is a plausible date string (no newlines, reasonable length)
if value.contains('\n') || value.contains('\r') {
return Err(format!(
"invalid_flag_value: --date value contains invalid characters.\nUsage: --date <YYYY-MM-DD>"
));
}
if value.len() > 20 {
return Err(format!(
"invalid_flag_value: --date value is too long ({len} chars, expected YYYY-MM-DD).\nUsage: --date <YYYY-MM-DD>",
len = value.len()
));
}
date.clone_from(value);
index += 2;
}
other => {
// #152: hint `--output-format json` when user types `--json`.
// #790: use unknown_option: prefix + \n hint so classify_error_kind returns