145 lines
3.7 KiB
Rust
145 lines
3.7 KiB
Rust
use std::error::Error;
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use base64::{
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engine::{self, general_purpose},
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Engine,
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};
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use chrono::{DateTime, Utc};
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use hyper::http::HeaderValue;
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use serde::{Deserialize, Serialize};
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#[derive(Deserialize, Serialize, Debug, Clone)]
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#[allow(dead_code)]
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struct JwtHeader {
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alg: String,
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typ: String,
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}
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#[derive(Deserialize, Serialize, Debug, Clone)]
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#[allow(dead_code)]
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enum ExpValue {
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Integer(i64),
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String(String),
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}
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#[derive(Deserialize, Serialize, Debug, Clone)]
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#[allow(dead_code)]
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struct JwtPayload {
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#[serde(deserialize_with = "deserialize_exp")]
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exp: i64,
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iss: Option<String>,
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user: Option<String>,
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}
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fn deserialize_exp<'de, D>(deserializer: D) -> Result<i64, D::Error>
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where
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D: serde::Deserializer<'de>,
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{
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use serde::de::Error;
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#[derive(Deserialize)]
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#[serde(untagged)]
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enum ExpValue {
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String(String),
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Number(i64),
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}
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match ExpValue::deserialize(deserializer)? {
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ExpValue::String(s) => s.parse().map_err(D::Error::custom),
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ExpValue::Number(n) => Ok(n),
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}
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}
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#[derive(Deserialize, Serialize, Debug, Clone)]
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#[allow(dead_code)]
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pub struct JwtToken {
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header: JwtHeader,
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payload: JwtPayload,
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signature: Vec<u8>,
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expiration_date: DateTime<Utc>,
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token: String,
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}
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impl JwtToken {
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fn decode_token_using_engine(
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token: &str,
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engine: engine::GeneralPurpose,
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) -> Result<Self, Box<dyn Error + Send + Sync>> {
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let mut parts = token.split('.');
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let header = parts.next().unwrap();
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let payload = parts.next().unwrap();
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let signature = parts.next().unwrap();
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let header = engine.decode(header)?;
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let payload = engine.decode(payload)?;
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let signature = engine.decode(signature)?;
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// Parse jwt header
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let header: JwtHeader = serde_json::from_slice(&header)?;
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// Parse jwt payload
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let payload: JwtPayload = serde_json::from_slice(&payload)?;
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// Parse jwt expiration date
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let timestamp = DateTime::from_timestamp(payload.exp, 0).unwrap().naive_utc();
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let expiration_date = DateTime::from_naive_utc_and_offset(timestamp, Utc);
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Ok(JwtToken {
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header,
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payload,
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signature,
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expiration_date,
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token: token.to_string(),
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})
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}
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pub fn new(token: &str) -> Result<Self, Box<dyn Error + Send + Sync>> {
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// STUPID: My mock server uses a different encoding than the real server, so we have to
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// try both encodings here.
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log::debug!("Attempting to decode JWT token: {}", token);
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let result = Self::decode_token_using_engine(token, general_purpose::STANDARD).or(
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Self::decode_token_using_engine(token, general_purpose::URL_SAFE_NO_PAD),
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);
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if let Err(ref e) = result {
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log::error!("Failed to decode JWT token: {}", e);
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log::error!("Token length: {}", token.len());
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log::error!("Token parts: {:?}", token.split('.').collect::<Vec<_>>());
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}
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result
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}
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pub fn dummy() -> Self {
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JwtToken {
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header: JwtHeader {
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alg: "none".to_string(),
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typ: "JWT".to_string(),
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},
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payload: JwtPayload {
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exp: 0,
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iss: None,
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user: None,
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},
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signature: vec![],
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expiration_date: Utc::now(),
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token: "".to_string(),
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}
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}
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pub fn is_valid(&self) -> bool {
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self.expiration_date > Utc::now()
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}
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pub fn to_header_value(&self) -> HeaderValue {
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format!("Bearer {}", self.token).parse().unwrap()
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}
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pub fn to_string(&self) -> String {
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self.token.clone()
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}
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}
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