{"record":{"id":"f1beae27741d354f","repo":"Hmbown/CodeWhale","slug":"the-codewhale-service-returned-an-invalid-device-a","errorCode":null,"errorMessage":"The Codewhale service returned an invalid device authorization response","messagePattern":"The Codewhale service returned an invalid device authorization response","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/cli/src/cloud.rs","lineNumber":873,"sourceCode":"        || bytes[4] != b'-'\n        || bytes[9] != b'-'\n        || bytes\n            .iter()\n            .enumerate()\n            .any(|(index, byte)| !matches!(index, 4 | 9) && !ALPHABET.contains(byte))\n    {\n        bail!(\"The Codewhale service returned an invalid user code\");\n    }\n    Ok(())\n}\n\nfn validate_device_code(code: &str) -> Result<()> {\n    if code.len() != 43\n        || !code\n            .bytes()\n            .all(|byte| byte.is_ascii_alphanumeric() || matches!(byte, b'-' | b'_'))\n    {\n        bail!(\"The Codewhale service returned an invalid device authorization response\");\n    }\n    Ok(())\n}\n\nfn validate_api_key(key: &str) -> Result<()> {\n    let bytes = key.len();\n    if bytes < MIN_API_KEY_BYTES || bytes as u64 > MAX_API_KEY_BYTES {\n        bail!(\"API key must be {MIN_API_KEY_BYTES}-{MAX_API_KEY_BYTES} UTF-8 bytes\");\n    }\n    if key.chars().any(is_ascii_control) {\n        bail!(\"API key contains invalid control characters\");\n    }\n    Ok(())\n}\n\nfn validate_label(label: &str) -> Result<String> {\n    let label = label.split_whitespace().collect::<Vec<_>>().join(\" \");\n    if label.is_empty()","sourceCodeStart":855,"sourceCodeEnd":891,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/0c42157ee52f9d55af2b506d71b46249910f77d3/crates/cli/src/cloud.rs#L855-L891","documentation":"The device_code from the device-authorization response must be exactly 43 characters of ASCII alphanumeric, hyphen, or underscore - the shape of a base64url-encoded 32-byte token. This bail fires when the token has a different length or contains characters like '=', '+', or '/', meaning the response is malformed or from an incompatible service version.","triggerScenarios":"validate_device_code receives a code with standard base64 padding ('...=='), a 64-char hex token, a JWT, or any length other than 43; also truncated codes cut off by header/line-length limits.","commonSituations":"A backend switching token encodings (hex, padded base64, JWT) without a CLI update; proxies or logs that truncate long tokens; a mock returning an opaque placeholder string.","solutions":["Emit the device_code as unpadded base64url (43 chars for 32 bytes of entropy) from the service","Update the CLI to the version matching the service's device-code encoding","Verify the full response body is received without truncation (check content-length, proxy buffering)","For local testing, generate codes with 43 chars from [A-Za-z0-9_-]"],"exampleFix":"// before\ndevice_code: \"c29tZS1kZXZpY2UtY29kZS10b2tlbi1wYWRkZWQ=\"\n// after\ndevice_code: \"c29tZS1kZXZpY2UtY29kZS10b2tlbi11bnBhZGRlZA\"  // 43 chars, [A-Za-z0-9_-]","handlingStrategy":"validation","validationCode":"fn is_valid_device_code(code: &str) -> bool {\n    code.len() == 43\n        && code.bytes().all(|b| b.is_ascii_alphanumeric() || matches!(b, b'-' | b'_'))\n}","typeGuard":"fn is_valid_device_code(code: &str) -> bool {\n    code.len() == 43\n        && code.bytes().all(|b| b.is_ascii_alphanumeric() || matches!(b, b'-' | b'_'))\n}","tryCatchPattern":null,"preventionTips":["Emit device codes as unpadded base64url of 32 random bytes (always 43 chars)","Property-test the encoder against the validator","Check for truncation when tokens pass through logs or header-limited proxies"],"tags":["cloud","oauth","device-flow","validation","token-format"],"backgroundTag":"oauth-device-code-format","analyzedSha":"0c42157ee52f9d55af2b506d71b46249910f77d3","analyzedAt":"2026-08-20T21:50:45.477Z","schemaVersion":2},"datasetVersion":"2026-08-21T13:17:26.733Z"}