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README.md
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README.md
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@ -6,8 +6,8 @@
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Add the following to Cargo.toml:
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```toml
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jsonwebtoken = "1"
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rustc-serialize = "0.3"
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jsonwebtoken = "2"
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serde_derive = "0.9"
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```
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## How to use
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@ -16,9 +16,10 @@ There is a complete example in `examples/claims.rs` but here's a quick one.
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In terms of imports:
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```rust
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extern crate jsonwebtoken as jwt;
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extern crate rustc_serialize;
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#[macro_use]
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extern crate serde_derive;
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use jwt::{encode, decode, Header, Algorithm};
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use jwt::{encode, decode, Header, Algorithm, Validation};
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```
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Look at the examples directory for 2 examples: a basic one and one with a custom
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@ -28,24 +29,43 @@ header.
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```rust
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let token = encode(&Header::default(), &my_claims, "secret".as_ref()).unwrap();
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```
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In that example, `my_claims` is an instance of a Claims struct that derives `RustcEncodable` and `RustcDecodable`.
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In that example, `my_claims` is an instance of a Claims struct that derives `Serialize` and `Deserialize`.
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The default algorithm is HS256.
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Look at custom headers section to see how to change that.
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### Decoding
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```rust
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let token = decode::<Claims>(&token, "secret", Algorithm::HS256).unwrap();
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let token = decode::<Claims>(&token, "secret", Algorithm::HS256, &Validation::default()).unwrap();
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// token is a struct with 2 params: header and claims
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```
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In addition to the normal base64/json decoding errors, `decode` can return two custom errors:
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`decode` can error for a variety of reasons:
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- **InvalidToken**: if the token is not a valid JWT
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- **InvalidSignature**: if the signature doesn't match
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- **WrongAlgorithmHeader**: if the alg in the header doesn't match the one given to decode
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- the token or its signature is invalid
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- error while decoding base64 or the result of decoding base64 is not valid UTF-8
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- validation failed
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### Validation
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The library only validates the algorithm type used but does not verify claims such as expiration.
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Feel free to add a `validate` method to your claims struct to handle that: there is an example of that in `examples/claims.rs`.
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This library validates automatically the `iat`, `exp` and `nbf` claims if found. You can also validate the `sub`, `iss` and `aud` but
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those require setting the expected value.
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You can add some leeway to the `iat`, `exp` and `nbf` validation by setting the `leeway` parameter as shown in the example below.
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```rust
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use jsonwebtoken::Validation;
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// Default valuation
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let validation = Validation::default();
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// Adding some leeway
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let mut validation = Validation {leeway: 1000 * 60, ..Default::default()};
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// Checking issuer
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let mut validation = Validation {iss: Some("issuer".to_string()), ..Default::default()};
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// Setting audience
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let mut validation = Validation::default();
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validation.set_audience(&"Me"); // string
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validation.set_audience(&["Me", "You"]); // array of strings
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```
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It's also possible to disable verifying the signature of a token by setting the `validate_signature` to `false`. This should
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only be done if you know what you are doing.
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### Custom headers
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All the parameters from the RFC are supported but the default header only has `typ` and `alg` set: all the other fields are optional.
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Look at `examples/custom_header.rs` for a full working example.
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## Algorithms
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The HMAC SHA family is supported: HMAC SHA256, HMAC SHA384 and HMAC SHA512 as well as the RSA PKCS1: RSA_PKCS1_SHA256,
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RSA_PKCS1_SHA384 and RSA_PKCS1_SHA512.
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This library currently supports the following:
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- HS256
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- HS384
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- HS512
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- RS256
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- RS384
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- RS512
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@ -1,5 +1,6 @@
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extern crate jsonwebtoken as jwt;
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#[macro_use] extern crate serde_derive;
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#[macro_use]
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extern crate serde_derive;
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use jwt::{encode, decode, Header, Algorithm, Validation};
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use jwt::errors::{ErrorKind};
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@ -11,18 +12,6 @@ struct Claims {
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company: String
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}
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// Example validation implementation
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impl Claims {
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fn is_valid(&self) -> bool {
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if self.company != "ACME" {
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return false;
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}
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// expiration etc
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true
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}
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}
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fn main() {
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let my_claims = Claims {
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sub: "b@b.com".to_owned(),
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@ -35,15 +24,16 @@ fn main() {
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};
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println!("{:?}", token);
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let validation = Validation {sub: Some("b@b.com".to_string()), ..Validation::default()};
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let token_data = match decode::<Claims>(&token, key.as_ref(), Algorithm::HS256, Validation::default()) {
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let token_data = match decode::<Claims>(&token, key.as_ref(), Algorithm::HS256, validation) {
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Ok(c) => c,
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Err(err) => match *err.kind() {
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ErrorKind::InvalidToken => panic!(), // Example on how to handle a specific error
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ErrorKind::InvalidIssuer => panic!(), // Example on how to handle a specific error
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_ => panic!()
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}
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};
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println!("{:?}", token_data.claims);
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println!("{:?}", token_data.header);
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println!("{:?}", token_data.claims.is_valid());
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}
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