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merge(alcoholic_jwt): Integrate at //net/alcoholic_jwt

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Vincent Ambo 2019-12-21 01:24:22 +00:00
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/target/
**/*.rs.bk
Cargo.lock

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[package]
name = "alcoholic_jwt"
description = "Library for validation of RS256 JWTs"
version = "1.0.0"
authors = ["Vincent Ambo <vincent@aprila.no>"]
keywords = ["jwt", "token", "jwks"]
categories = ["authentication"]
license = "GPL-3.0-or-later"
repository = "https://github.com/aprilabank/alcoholic_jwt"
[dependencies]
base64 = "0.10"
openssl = "0.10"
serde = "1.0"
serde_derive = "1.0"
serde_json = "1.0"

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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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alcoholic_jwt
=============
[![Build Status](https://travis-ci.org/aprilabank/alcoholic_jwt.svg?branch=master)](https://travis-ci.org/aprilabank/alcoholic_jwt)
This is a library for **validation** of **RS256** JWTs using keys from
a JWKS. Nothing more, nothing less.
RS256 is the most commonly used asymmetric signature mechanism for
JWTs, encountered in for example [Google][]'s or [Aprila][]'s APIs.
The name of the library stems from the potential side-effects of
trying to use the other Rust libraries that are made for similar
purposes.
## Usage overview
You are retrieving JWTs from some authentication provider that uses
`RS256` signatures and provides its public keys in [JWKS][] format.
Example for a token that provides the key ID used for signing in the
[`kid` claim][]:
```rust
extern crate alcoholic_jwt;
use alcoholic_jwt::{JWKS, Validation, validate, token_kid};
// The function implied here would usually perform an HTTP-GET
// on the JWKS-URL for an authentication provider and deserialize
// the result into the `alcoholic_jwt::JWKS`-struct.
let jwks: JWKS = jwks_fetching_function();
let token: String = some_token_fetching_function();
// Several types of built-in validations are provided:
let validations = vec![
Validation::Issuer("auth.test.aprila.no".into()),
Validation::SubjectPresent,
];
// If a JWKS contains multiple keys, the correct KID first
// needs to be fetched from the token headers.
let kid = token_kid(&token)
.expect("Failed to decode token headers")
.expect("No 'kid' claim present in token");
let jwk = jwks.find(&kid).expect("Specified key not found in set");
validate(token, jwk, validations).expect("Token validation has failed!");
```
## Under the hood
This library aims to only use trustworthy off-the-shelf components to
do the work. Cryptographic operations are provided by the `openssl`
crate, JSON-serialisation is provided by `serde_json`.
[Google]: https://www.google.com/
[Aprila]: https://www.aprila.no/
[JWKS]: https://tools.ietf.org/html/rfc7517
[`kid` claim]: https://tools.ietf.org/html/rfc7515#section-4.1.4

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// Copyright (C) 2018 Aprila Bank ASA
//
// alcoholic_jwt is free software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//! Implements a library for for **validation** of **RS256** JWTs
//! using keys from a JWKS. Nothing more, nothing less.
//!
//! The name of the library stems from the potential side-effects of
//! trying to use the other Rust libraries that are made for similar
//! purposes.
//!
//! This library is specifically aimed at developers that consume
//! tokens from services which provide their RSA public keys in
//! [JWKS][] format.
//!
//! ## Usage example (token with `kid`-claim)
//!
//! ```rust
//! # extern crate serde_json;
//! extern crate alcoholic_jwt;
//!
//! use alcoholic_jwt::{JWKS, Validation, validate, token_kid};
//!
//! # fn some_token_fetching_function() -> &'static str {
//! # "eyJraWQiOiI4ckRxOFB3MEZaY2FvWFdURVZRbzcrVGYyWXpTTDFmQnhOS1BDZWJhYWk0PSIsImFsZyI6IlJTMjU2IiwidHlwIjoiSldUIn0.eyJpc3MiOiJhdXRoLnRlc3QuYXByaWxhLm5vIiwiaWF0IjoxNTM2MDUwNjkzLCJleHAiOjE1MzYwNTQyOTMsInN1YiI6IjQyIiwiZXh0Ijoic21va2V0ZXN0IiwicHJ2IjoiYXJpc3RpIiwic2NwIjoicHJvY2VzcyJ9.gOLsv98109qLkmRK6Dn7WWRHLW7o8W78WZcWvFZoxPLzVO0qvRXXRLYc9h5chpfvcWreLZ4f1cOdvxv31_qnCRSQQPOeQ7r7hj_sPEDzhKjk-q2aoNHaGGJg1vabI--9EFkFsGQfoS7UbMMssS44dgR68XEnKtjn0Vys-Vzbvz_CBSCH6yQhRLik2SU2jR2L7BoFvh4LGZ6EKoQWzm8Z-CHXLGLUs4Hp5aPhF46dGzgAzwlPFW4t9G4DciX1uB4vv1XnfTc5wqJch6ltjKMde1GZwLR757a8dJSBcmGWze3UNE2YH_VLD7NCwH2kkqr3gh8rn7lWKG4AUIYPxsw9CB"
//! # }
//!
//! # fn jwks_fetching_function() -> JWKS {
//! # let jwks_json = "{\"keys\":[{\"kty\":\"RSA\",\"alg\":\"RS256\",\"use\":\"sig\",\"kid\":\"8rDq8Pw0FZcaoXWTEVQo7+Tf2YzSL1fBxNKPCebaai4=\",\"n\":\"l4UTgk1zr-8C8utt0E57DtBV6qqAPWzVRrIuQS2j0_hp2CviaNl5XzGRDnB8gwk0Hx95YOhJupAe6RNq5ok3fDdxL7DLvppJNRLz3Ag9CsmDLcbXgNEQys33fBJaPw1v3GcaFC4tisU5p-o1f5RfWwvwdBtdBfGiwT1GRvbc5sFx6M4iYjg9uv1lNKW60PqSJW4iDYrfqzZmB0zF1SJ0BL_rnQZ1Wi_UkFmNe9arM8W9tI9T3Ie59HITFuyVSTCt6qQEtSfa1e5PiBaVuV3qoFI2jPBiVZQ6LPGBWEDyz4QtrHLdECPPoTF30NN6TSVwwlRbCuUUrdNdXdjYe2dMFQ\",\"e\":\"DhaD5zC7mzaDvHO192wKT_9sfsVmdy8w8T8C9VG17_b1jG2srd3cmc6Ycw-0blDf53Wrpi9-KGZXKHX6_uIuJK249WhkP7N1SHrTJxO0sUJ8AhK482PLF09Qtu6cUfJqY1X1y1S2vACJZItU4Vjr3YAfiVGQXeA8frAf7Sm4O1CBStCyg6yCcIbGojII0jfh2vSB-GD9ok1F69Nmk-R-bClyqMCV_Oq-5a0gqClVS8pDyGYMgKTww2RHgZaFSUcG13KeLMQsG2UOB2OjSC8FkOXK00NBlAjU3d0Vv-IamaLIszO7FQBY3Oh0uxNOvIE9ofQyCOpB-xIK6V9CTTphxw\"}]}";
//! # serde_json::from_str(jwks_json).unwrap()
//! # }
//! #
//! // The function implied here would usually perform an HTTP-GET
//! // on the JWKS-URL for an authentication provider and deserialize
//! // the result into the `alcoholic_jwt::JWKS`-struct.
//! let jwks: JWKS = jwks_fetching_function();
//!
//! let token = some_token_fetching_function();
//!
//! // Several types of built-in validations are provided:
//! let validations = vec![
//! Validation::Issuer("auth.test.aprila.no".into()),
//! Validation::SubjectPresent,
//! ];
//!
//! // If a JWKS contains multiple keys, the correct KID first
//! // needs to be fetched from the token headers.
//! let kid = token_kid(&token)
//! .expect("Failed to decode token headers")
//! .expect("No 'kid' claim present in token");
//!
//! let jwk = jwks.find(&kid).expect("Specified key not found in set");
//!
//! validate(token, jwk, validations).expect("Token validation has failed!");
//! ```
//!
//! [JWKS]: https://tools.ietf.org/html/rfc7517
#[macro_use] extern crate serde_derive;
extern crate base64;
extern crate openssl;
extern crate serde;
extern crate serde_json;
use base64::{URL_SAFE_NO_PAD, Config, DecodeError};
use openssl::bn::BigNum;
use openssl::error::ErrorStack;
use openssl::hash::MessageDigest;
use openssl::pkey::{Public, PKey};
use openssl::rsa::Rsa;
use openssl::sign::Verifier;
use serde::de::DeserializeOwned;
use serde_json::Value;
use std::time::{UNIX_EPOCH, Duration, SystemTime};
#[cfg(test)]
mod tests;
/// URL-safe character set without padding that allows trailing bits,
/// which appear in some JWT implementations.
///
/// Note: The functions on `base64::Config` are not marked `const`,
/// and the constructors are not exported, which is why this is
/// implemented as a function.
fn jwt_forgiving() -> Config {
URL_SAFE_NO_PAD.decode_allow_trailing_bits(true)
}
/// JWT algorithm used. The only supported algorithm is currently
/// RS256.
#[derive(Clone, Deserialize, Debug)]
enum KeyAlgorithm { RS256 }
/// Type of key contained in a JWT. The only supported key type is
/// currently RSA.
#[derive(Clone, Deserialize, Debug)]
enum KeyType { RSA }
/// Representation of a single JSON Web Key. See [RFC
/// 7517](https://tools.ietf.org/html/rfc7517#section-4).
#[allow(dead_code)] // kty & alg only constrain deserialisation, but aren't used
#[derive(Clone, Debug, Deserialize)]
pub struct JWK {
kty: KeyType,
alg: Option<KeyAlgorithm>,
kid: Option<String>,
// Shared modulus
n: String,
// Public key exponent
e: String,
}
/// Representation of a set of JSON Web Keys. See [RFC
/// 7517](https://tools.ietf.org/html/rfc7517#section-5).
#[derive(Clone, Debug, Deserialize)]
pub struct JWKS {
// This is a vector instead of some kind of map-like structure
// because key IDs are in fact optional.
//
// Technically having multiple keys with the same KID would not
// violate the JWKS-definition either, but behaviour in that case
// is unspecified.
keys: Vec<JWK>,
}
impl JWKS {
/// Attempt to find a JWK by its key ID.
pub fn find(&self, kid: &str) -> Option<&JWK> {
self.keys.iter().find(|jwk| jwk.kid == Some(kid.into()))
}
}
/// Representation of an undecoded JSON Web Token. See [RFC
/// 7519](https://tools.ietf.org/html/rfc7519).
struct JWT<'a> (&'a str);
/// Representation of a decoded and validated JSON Web Token.
///
/// Specific claim fields are only decoded internally in the library
/// for validation purposes, while it is generally up to the consumer
/// of the validated JWT what structure they would like to impose.
pub struct ValidJWT {
/// JOSE header of the JSON Web Token. Certain fields are
/// guaranteed to be present in this header, consult section 5 of
/// RFC7519 for more information.
pub headers: Value,
/// Claims (i.e. primary data) contained in the JSON Web Token.
/// While there are several registered and recommended headers
/// (consult section 4.1 of RFC7519), the presence of no field is
/// guaranteed in these.
pub claims: Value,
}
/// Possible token claim validations. This enumeration only covers
/// common use-cases, for other types of validations the user is
/// encouraged to inspect the claim set manually.
pub enum Validation {
/// Validate that the issuer ("iss") claim matches a specified
/// value.
Issuer(String),
/// Validate that the audience ("aud") claim matches a specified
/// value.
Audience(String),
/// Validate that a subject value is present.
SubjectPresent,
/// Validate that the expiry time of the token ("exp"-claim) has
/// not yet been reached.
NotExpired,
}
/// Possible results of a token validation.
#[derive(Debug)]
pub enum ValidationError {
/// Invalid number of token components (not a JWT?)
InvalidComponents,
/// Token segments had invalid base64-encoding.
InvalidBase64(DecodeError),
/// Decoding of the provided JWK failed.
InvalidJWK,
/// Signature validation failed, i.e. because of a non-matching
/// public key.
InvalidSignature,
/// An OpenSSL operation failed along the way at a point at which
/// a more specific error variant could not be constructed.
OpenSSL(ErrorStack),
/// JSON decoding into a provided type failed.
JSON(serde_json::Error),
/// One or more claim validations failed. This variant contains
/// human-readable validation errors.
InvalidClaims(Vec<&'static str>),
}
type JWTResult<T> = Result<T, ValidationError>;
impl From<ErrorStack> for ValidationError {
fn from(err: ErrorStack) -> Self { ValidationError::OpenSSL(err) }
}
impl From<serde_json::Error> for ValidationError {
fn from(err: serde_json::Error) -> Self { ValidationError::JSON(err) }
}
impl From<DecodeError> for ValidationError {
fn from(err: DecodeError) -> Self { ValidationError::InvalidBase64(err) }
}
/// Attempt to extract the `kid`-claim out of a JWT's header claims.
///
/// This function is normally used when a token provider has multiple
/// public keys in rotation at the same time that could all still have
/// valid tokens issued under them.
///
/// This is only safe if the key set containing the currently allowed
/// key IDs is fetched from a trusted source.
pub fn token_kid(token: &str) -> JWTResult<Option<String>> {
// Fetch the header component of the JWT by splitting it out and
// dismissing the rest.
let parts: Vec<&str> = token.splitn(2, '.').collect();
if parts.len() != 2 {
return Err(ValidationError::InvalidComponents);
}
// Decode only the first part of the token into a specialised
// representation:
#[derive(Deserialize)]
struct KidOnly {
kid: Option<String>,
}
let kid_only: KidOnly = deserialize_part(parts[0])?;
Ok(kid_only.kid)
}
/// Validate the signature of a JSON Web Token and optionally apply
/// claim validations. Signatures are always verified before claims,
/// and if a signature verification passes *all* claim validations are
/// run and returned.
///
/// If validation succeeds a representation of the token is returned
/// that contains the header and claims as simple JSON values.
///
/// It is the user's task to ensure that the correct JWK is passed in
/// for validation.
pub fn validate(token: &str,
jwk: &JWK,
validations: Vec<Validation>) -> JWTResult<ValidJWT> {
let jwt = JWT(token);
let public_key = public_key_from_jwk(&jwk)?;
validate_jwt_signature(&jwt, public_key)?;
// Split out all three parts of the JWT this time, deserialising
// the first and second as appropriate.
let parts: Vec<&str> = jwt.0.splitn(3, '.').collect();
if parts.len() != 3 {
// This is unlikely considering that validation has already
// been performed at this point, but better safe than sorry.
return Err(ValidationError::InvalidComponents)
}
// Perform claim validations before constructing the valid token:
let partial_claims = deserialize_part(parts[1])?;
validate_claims(partial_claims, validations)?;
let headers = deserialize_part(parts[0])?;
let claims = deserialize_part(parts[1])?;
let valid_jwt = ValidJWT { headers, claims };
Ok(valid_jwt)
}
// Internal implementation
//
// The functions in the following section are not part of the public
// API of this library.
/// Decode a single key fragment (base64-url encoded integer) to an
/// OpenSSL BigNum.
fn decode_fragment(fragment: &str) -> JWTResult<BigNum> {
let bytes = base64::decode_config(fragment, jwt_forgiving())
.map_err(|_| ValidationError::InvalidJWK)?;
BigNum::from_slice(&bytes).map_err(Into::into)
}
/// Decode an RSA public key from a JWK by constructing it directly
/// from the public RSA key fragments.
fn public_key_from_jwk(jwk: &JWK) -> JWTResult<Rsa<Public>> {
let jwk_n = decode_fragment(&jwk.n)?;
let jwk_e = decode_fragment(&jwk.e)?;
Rsa::from_public_components(jwk_n, jwk_e).map_err(Into::into)
}
/// Decode a base64-URL encoded string and deserialise the resulting
/// JSON.
fn deserialize_part<T: DeserializeOwned>(part: &str) -> JWTResult<T> {
let json = base64::decode_config(part, jwt_forgiving())?;
serde_json::from_slice(&json).map_err(Into::into)
}
/// Validate the signature on a JWT using a provided public key.
///
/// A JWT is made up of three components (headers, claims, signature)
/// - only the first two are part of the signed data.
fn validate_jwt_signature(jwt: &JWT, key: Rsa<Public>) -> JWTResult<()> {
let key = PKey::from_rsa(key)?;
let mut verifier = Verifier::new(MessageDigest::sha256(), &key)?;
// Split the token from the back to a maximum of two elements.
// There are technically three components using the same separator
// ('.'), but we are interested in the first two together and
// splitting them is unnecessary.
let token_parts: Vec<&str> = jwt.0.rsplitn(2, '.').collect();
if token_parts.len() != 2 {
return Err(ValidationError::InvalidComponents);
}
// Second element of the vector will be the signed payload.
let data = token_parts[1];
// First element of the vector will be the (encoded) signature.
let sig_b64 = token_parts[0];
let sig = base64::decode_config(sig_b64, jwt_forgiving())?;
// Verify signature by inserting the payload data and checking it
// against the decoded signature.
verifier.update(data.as_bytes())?;
match verifier.verify(&sig)? {
true => Ok(()),
false => Err(ValidationError::InvalidSignature),
}
}
/// Internal helper struct for claims that are relevant for claim
/// validations.
#[derive(Deserialize)]
struct PartialClaims {
aud: Option<String>,
iss: Option<String>,
sub: Option<String>,
exp: Option<u64>,
}
/// Apply a single validation to the claim set of a token.
fn apply_validation(claims: &PartialClaims,
validation: Validation) -> Result<(), &'static str> {
match validation {
// Validate that an 'iss' claim is present and matches the
// supplied value.
Validation::Issuer(iss) => {
match claims.iss {
None => Err("'iss' claim is missing"),
Some(ref claim) => if *claim == iss {
Ok(())
} else {
Err("'iss' claim does not match")
}
}
},
// Validate that an 'aud' claim is present and matches the
// supplied value.
Validation::Audience(aud) => {
match claims.aud {
None => Err("'aud' claim is missing"),
Some(ref claim) => if *claim == aud {
Ok(())
} else {
Err("'aud' claim does not match")
}
}
},
Validation::SubjectPresent => match claims.sub {
Some(_) => Ok(()),
None => Err("'sub' claim is missing"),
},
Validation::NotExpired => match claims.exp {
None => Err("'exp' claim is missing"),
Some(exp) => {
// Determine the current timestamp in seconds since
// the UNIX epoch.
let now = SystemTime::now()
.duration_since(UNIX_EPOCH)
// this is an unrecoverable, critical error. There
// aren't many ways this can occur, other than
// system time being set into the far future or
// this library being used in some sort of future
// museum.
.expect("system time is likely incorrect");
// Convert the expiry time (which is also in epoch
// seconds) to a duration.
let exp_duration = Duration::from_secs(exp);
// The token has not expired if the expiry duration is
// larger than (i.e. in the future from) the current
// time.
if exp_duration > now {
Ok(())
} else {
Err("token has expired")
}
}
},
}
}
/// Apply all requested validations to a partial claim set.
fn validate_claims(claims: PartialClaims,
validations: Vec<Validation>) -> JWTResult<()> {
let validation_errors: Vec<_> = validations.into_iter()
.map(|v| apply_validation(&claims, v))
.filter_map(|result| match result {
Ok(_) => None,
Err(err) => Some(err),
})
.collect();
if validation_errors.is_empty() {
Ok(())
} else {
Err(ValidationError::InvalidClaims(validation_errors))
}
}

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// Copyright (C) 2018 Aprila Bank ASA
//
// alcoholic_jwt is free software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
use super::*;
#[test]
fn test_fragment_decoding() {
let fragment = "ngRRjNbXgPW29oNtF0JgsyyfTwPyEL0u_X16s453X2AOc33XGFxVKLEQ7R_TiMenaKcr-tPifYqgps_deyi0XOr4I3SOdOMtAVKDZJCANe--CANOHZb-meIfjKhCHisvT90fm5Apd6qPRVsXsZ7A8pmClZHKM5fwZUkBv8NsPLm2Xy2sGOZIiwP_7z8m3j0abUzniPQsx2b3xcWimB9vRtshFHN1KgPUf1ALQ5xzLfJnlFkCxC7kmOxKC7_NpQ4kJR_DKzKFV_r3HxTqf-jddHcXIrrMcLQXCSyeLQtLaz7whQ4F-EfL42z4XgwPr4ji3sct2gWL13EqlbE5DDxLKQ";
let bignum = decode_fragment(fragment).expect("Failed to decode fragment");
let expected = "19947781743618558124649689124245117083485690334420160711273532766920651190711502679542723943527557680293732686428091794139998732541701457212387600480039297092835433997837314251024513773285252960725418984381935183495143908023024822433135775773958512751261112853383693442999603704969543668619221464654540065497665889289271044207667765128672709218996183649696030570183970367596949687544839066873508106034650634722970893169823917299050098551447676778961773465887890052852528696684907153295689693676910831376066659456592813140662563597179711588277621736656871685099184755908108451080261403193680966083938080206832839445289";
assert_eq!(expected, format!("{}", bignum), "Decoded fragment should match ");
}
#[test]
fn test_decode_find_jwks() {
let json = "{\"keys\":[{\"kty\":\"RSA\",\"alg\":\"RS256\",\"use\":\"sig\",\"kid\":\"mUjI\\/rIMLLtung35BKZfdbrqtlEAAYJ4JX\\/SKvnLxJc=\",\"n\":\"ngRRjNbXgPW29oNtF0JgsyyfTwPyEL0u_X16s453X2AOc33XGFxVKLEQ7R_TiMenaKcr-tPifYqgps_deyi0XOr4I3SOdOMtAVKDZJCANe--CANOHZb-meIfjKhCHisvT90fm5Apd6qPRVsXsZ7A8pmClZHKM5fwZUkBv8NsPLm2Xy2sGOZIiwP_7z8m3j0abUzniPQsx2b3xcWimB9vRtshFHN1KgPUf1ALQ5xzLfJnlFkCxC7kmOxKC7_NpQ4kJR_DKzKFV_r3HxTqf-jddHcXIrrMcLQXCSyeLQtLaz7whQ4F-EfL42z4XgwPr4ji3sct2gWL13EqlbE5DDxLKQ\",\"e\":\"GK7oLCDbNPAF59LhvyseqcG04hDnPs58qGYolr_HHmaR4lulWJ90ozx6e4Ut363yKG2p9vwvivR5UIC-aLPtqT2qr-OtjhBFzUFVaMGZ6mPCvMKk0AgMYdOHvWTgBSqQtNJTvl1yYLnhcWyoE2fLQhoEbY9qUyCBCEOScXOZRDpnmBtz5I8q5yYMV6a920J24T_IYbxHgkGcEU2SGg-b1cOMD7Rja7vCfV---CQ2pR4leQ0jufzudDoe7z3mziJm-Ihcdrz2Ujy5kPEMdz6R55prJ-ENKrkD_X4u5aSlSRaetwmHS3oAVkjr1JwUNbqnpM-kOqieqHEp8LUmez-Znw\"}]}";
let jwks: JWKS = serde_json::from_str(json).expect("Failed to decode JWKS");
let jwk = jwks.find("mUjI/rIMLLtung35BKZfdbrqtlEAAYJ4JX/SKvnLxJc=")
.expect("Failed to find required JWK");
public_key_from_jwk(&jwk).expect("Failed to construct public key from JWK");
}
#[test]
fn test_token_kid() {
let jwt = "eyJraWQiOiI4ckRxOFB3MEZaY2FvWFdURVZRbzcrVGYyWXpTTDFmQnhOS1BDZWJhYWk0PSIsImFsZyI6IlJTMjU2IiwidHlwIjoiSldUIn0.eyJpc3MiOiJhdXRoLnRlc3QuYXByaWxhLm5vIiwiaWF0IjoxNTM2MDUwNjkzLCJleHAiOjE1MzYwNTQyOTMsInN1YiI6IjQyIiwiZXh0Ijoic21va2V0ZXN0IiwicHJ2IjoiYXJpc3RpIiwic2NwIjoicHJvY2VzcyJ9.gOLsv98109qLkmRK6Dn7WWRHLW7o8W78WZcWvFZoxPLzVO0qvRXXRLYc9h5chpfvcWreLZ4f1cOdvxv31_qnCRSQQPOeQ7r7hj_sPEDzhKjk-q2aoNHaGGJg1vabI--9EFkFsGQfoS7UbMMssS44dgR68XEnKtjn0Vys-Vzbvz_CBSCH6yQhRLik2SU2jR2L7BoFvh4LGZ6EKoQWzm8Z-CHXLGLUs4Hp5aPhF46dGzgAzwlPFW4t9G4DciX1uB4vv1XnfTc5wqJch6ltjKMde1GZwLR757a8dJSBcmGWze3UNE2YH_VLD7NCwH2kkqr3gh8rn7lWKG4AUIYPxsw9CB";
let kid = token_kid(&jwt).expect("Failed to extract token KID");
assert_eq!(Some("8rDq8Pw0FZcaoXWTEVQo7+Tf2YzSL1fBxNKPCebaai4=".into()),
kid, "Extracted KID did not match expected KID");
}
#[test]
fn test_validate_jwt() {
let jwks_json = "{\"keys\":[{\"kty\":\"RSA\",\"alg\":\"RS256\",\"use\":\"sig\",\"kid\":\"8rDq8Pw0FZcaoXWTEVQo7+Tf2YzSL1fBxNKPCebaai4=\",\"n\":\"l4UTgk1zr-8C8utt0E57DtBV6qqAPWzVRrIuQS2j0_hp2CviaNl5XzGRDnB8gwk0Hx95YOhJupAe6RNq5ok3fDdxL7DLvppJNRLz3Ag9CsmDLcbXgNEQys33fBJaPw1v3GcaFC4tisU5p-o1f5RfWwvwdBtdBfGiwT1GRvbc5sFx6M4iYjg9uv1lNKW60PqSJW4iDYrfqzZmB0zF1SJ0BL_rnQZ1Wi_UkFmNe9arM8W9tI9T3Ie59HITFuyVSTCt6qQEtSfa1e5PiBaVuV3qoFI2jPBiVZQ6LPGBWEDyz4QtrHLdECPPoTF30NN6TSVwwlRbCuUUrdNdXdjYe2dMFQ\",\"e\":\"DhaD5zC7mzaDvHO192wKT_9sfsVmdy8w8T8C9VG17_b1jG2srd3cmc6Ycw-0blDf53Wrpi9-KGZXKHX6_uIuJK249WhkP7N1SHrTJxO0sUJ8AhK482PLF09Qtu6cUfJqY1X1y1S2vACJZItU4Vjr3YAfiVGQXeA8frAf7Sm4O1CBStCyg6yCcIbGojII0jfh2vSB-GD9ok1F69Nmk-R-bClyqMCV_Oq-5a0gqClVS8pDyGYMgKTww2RHgZaFSUcG13KeLMQsG2UOB2OjSC8FkOXK00NBlAjU3d0Vv-IamaLIszO7FQBY3Oh0uxNOvIE9ofQyCOpB-xIK6V9CTTphxw\"}]}";
let jwks: JWKS = serde_json::from_str(jwks_json)
.expect("Failed to decode JWKS");
let jwk = jwks.find("8rDq8Pw0FZcaoXWTEVQo7+Tf2YzSL1fBxNKPCebaai4=")
.expect("Failed to find required JWK");
let pkey = public_key_from_jwk(&jwk).expect("Failed to construct public key");
let jwt = JWT("eyJraWQiOiI4ckRxOFB3MEZaY2FvWFdURVZRbzcrVGYyWXpTTDFmQnhOS1BDZWJhYWk0PSIsImFsZyI6IlJTMjU2IiwidHlwIjoiSldUIn0.eyJpc3MiOiJhdXRoLnRlc3QuYXByaWxhLm5vIiwiaWF0IjoxNTM2MDUwNjkzLCJleHAiOjE1MzYwNTQyOTMsInN1YiI6IjQyIiwiZXh0Ijoic21va2V0ZXN0IiwicHJ2IjoiYXJpc3RpIiwic2NwIjoicHJvY2VzcyJ9.gOLsv98109qLkmRK6Dn7WWRHLW7o8W78WZcWvFZoxPLzVO0qvRXXRLYc9h5chpfvcWreLZ4f1cOdvxv31_qnCRSQQPOeQ7r7hj_sPEDzhKjk-q2aoNHaGGJg1vabI--9EFkFsGQfoS7UbMMssS44dgR68XEnKtjn0Vys-Vzbvz_CBSCH6yQhRLik2SU2jR2L7BoFvh4LGZ6EKoQWzm8Z-CHXLGLUs4Hp5aPhF46dGzgAzwlPFW4t9G4DciX1uB4vv1XnfTc5wqJch6ltjKMde1GZwLR757a8dJSBcmGWze3UNE2YH_VLD7NCwH2kkqr3gh8rn7lWKG4AUIYPxsw9CB".into());
validate_jwt_signature(&jwt, pkey).expect("Validation failed unexpectedly");
}