tonhowtf/omniget · error · anyhow::Error

hex inválido

Error message

hex inválido: {}

What it means

In ctf/xor, when opts.input_hex is true the tool decodes opts.input from hexadecimal (after stripping spaces, newlines and colons). Any value rejected by the hex crate — odd number of digits or non-hex characters — produces 'hex inválido: <hex error>'.

Solutions

1. Fix the input so it is valid hex: even number of characters, only 0-9a-fA-F (optionally separated by spaces/newlines/colons)
2. Remove '0x' prefixes before passing the value
3. If the data is actually text/binary, set input_hex to false so it is treated as raw bytes

Example fix

// before
let opts = XorOptions { input_hex: true, input: "0x48 std".into(), .. }; // invalid
// after
let opts = XorOptions { input_hex: true, input: "48 65 6c 6c 6f".into(), .. };

fn is_hex(s: &str) -> bool {
    let cleaned: String = s.chars().filter(|c| !c.is_whitespace() && *c != ':').collect();
    cleaned.len() % 2 == 0 && cleaned.chars().all(|c| c.is_ascii_hexdigit())
}
if opts.input_hex && !is_hex(&opts.input) { anyhow::bail!("input is not valid hex"); }

fn valid_hex_input(opts: &XorOptions) -> bool {
    !opts.input_hex || (opts.input.trim().replace([' ', '\n', ':'], "").len() % 2 == 0
        && opts.input.chars().all(|c| c.is_whitespace() || c == ':' || c.is_ascii_hexdigit()))
}

When it happens

Trigger: Calling XorOptions { input_hex: true, .. } with input containing characters outside 0-9a-fA-F after whitespace/colon stripping, or an odd-length hex string.

Common situations: Pasting base64 or raw binary text instead of hex; leaving a '0x' prefix in the string; odd digit count from manual transcription; trailing punctuation like '.' or ';'.

Understand the failure class

Background: "Invalid ... format", "must be in format X", "does not look like a ..." — invalid argument format errors across CLI tools and libraries — this error's family across 17 libraries.

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AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/f3c3939a7cd4e888. Report an issue: GitHub.

Appendix: source

Thrown at src-tauri/omniget-core/src/core/tools/ctf/xor.rs:149

}

fn default_mode() -> String {
    "single".into()
}
fn default_max() -> usize {
    16
}

#[derive(Debug, Clone, Serialize)]
pub struct XorResult {
    pub candidates: Vec<XorCandidate>,
    pub key_sizes: Vec<(usize, f64)>,
}

pub fn run(opts: &XorOptions) -> anyhow::Result<XorResult> {
    let data = if opts.input_hex {
        hex::decode(opts.input.trim().replace([' ', '\n', ':'], ""))
            .map_err(|e| anyhow::anyhow!("hex inválido: {}", e))?
    } else {
        opts.input.as_bytes().to_vec()
    };
    Ok(match opts.mode.as_str() {
        "apply" => {
            let key = if opts.key_hex {
                hex::decode(opts.key.trim()).map_err(|e| anyhow::anyhow!("chave hex: {}", e))?
            } else {
                opts.key.as_bytes().to_vec()
            };
            let out = xor(&data, &key);
            XorResult {
                candidates: vec![XorCandidate {
                    key: opts.key.clone(),
                    key_hex: hex::encode(&key),
                    text: String::from_utf8_lossy(&out).to_string(),
                    score: 0.0,
                }],

View on GitHub (pinned to 8600b91f42)