Precompute headers
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parent
4ebcfca049
commit
0f41c31687
31
src/lib.rs
31
src/lib.rs
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@ -19,7 +19,7 @@ use crypto::util::fixed_time_eq;
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pub mod errors;
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use errors::Error;
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#[derive(Debug, PartialEq, Copy, Clone, RustcDecodable, RustcEncodable)]
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#[derive(Debug, PartialEq, Copy, Clone)]
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/// The algorithms supported for signing/verifying
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pub enum Algorithm {
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HS256,
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@ -47,23 +47,46 @@ impl<T> Part for T where T: Encodable + Decodable {
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}
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}
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#[derive(Debug, PartialEq, RustcEncodable, RustcDecodable)]
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#[derive(Debug, PartialEq)]
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/// A basic JWT header part, the alg is automatically filled for use
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/// It's missing things like the kid but that's for later
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pub struct Header {
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typ: String,
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typ: &'static str,
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alg: Algorithm,
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}
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impl Header {
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pub fn new(algorithm: Algorithm) -> Header {
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Header {
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typ: "JWT".to_owned(),
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typ: "JWT",
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alg: algorithm,
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}
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}
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}
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impl Part for Header {
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fn from_base64<B: AsRef<[u8]>>(encoded: B) -> Result<Self, Error> where Self: Sized {
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let algoritm = match encoded.as_ref() {
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b"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9" => { Algorithm::HS256 },
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b"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzM4NCJ9" => { Algorithm::HS384 },
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b"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9" => { Algorithm::HS512 },
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_ => return Err(Error::InvalidToken)
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};
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Ok(Header::new(algoritm))
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}
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fn to_base64(&self) -> Result<String, Error> {
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let encoded = match self.alg {
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Algorithm::HS256 => { "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9" },
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Algorithm::HS384 => { "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzM4NCJ9" },
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Algorithm::HS512 => { "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9" },
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};
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Ok(encoded.into())
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}
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}
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/// Take the payload of a JWT and sign it using the algorithm given.
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/// Returns the base64 url safe encoded of the hmac result
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fn sign(data: &str, secret: &[u8], algorithm: Algorithm) -> String {
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