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tgross35 avatar tgross35 commented on June 23, 2024

This is what I currently have, it could probably be simplified internally

/// Get a verifier from a JWK
fn get_verifier(jwk: &Jwk) -> Result<Box<dyn JwsVerifier>> {
    // Start with most likely algorithms
    jws::ES512
        .verifier_from_jwk(jwk)
        .or_else(|_| jws::ES256.verifier_from_jwk(jwk))
        .or_else(|_| jws::ES256K.verifier_from_jwk(jwk))
        .or_else(|_| jws::ES384.verifier_from_jwk(jwk))
        .map(|v| Box::new(v) as Box<dyn JwsVerifier>)
        .or_else(|_| {
            // EdDSA
            jws::EdDSA
                .verifier_from_jwk(jwk)
                .map(|v| Box::new(v) as Box<dyn JwsVerifier>)
        })
        .or_else(|_| {
            // HMAC
            jws::HS256
                .verifier_from_jwk(jwk)
                .or_else(|_| jws::HS384.verifier_from_jwk(jwk))
                .or_else(|_| jws::HS512.verifier_from_jwk(jwk))
                .map(|v| Box::new(v) as Box<dyn JwsVerifier>)
        })
        .or_else(|_| {
            // RSA
            jws::RS256
                .verifier_from_jwk(jwk)
                .or_else(|_| jws::RS384.verifier_from_jwk(jwk))
                .or_else(|_| jws::RS512.verifier_from_jwk(jwk))
                .map(|v| Box::new(v) as Box<dyn JwsVerifier>)
        })
        .or_else(|_| {
            // RSA PSS
            jws::PS256
                .verifier_from_jwk(jwk)
                .or_else(|_| jws::PS384.verifier_from_jwk(jwk))
                .or_else(|_| jws::PS512.verifier_from_jwk(jwk))
                .map(|v| Box::new(v) as Box<dyn JwsVerifier>)
        })
        .map_err(Into::into)
}

from josekit-rs.

hidekatsu-izuno avatar hidekatsu-izuno commented on June 23, 2024

As JwsVerifier is extensively, There is not simple solution. But you can use a Box with trait.

For example:

        let verifier: Box<dyn JwsVerifier> = match jwk.algorithm() {
            Some("HS256") => Box::new(HS256.verifier_from_jwk(&jwk)?),
            Some("HS384") => Box::new(HS384.verifier_from_jwk(&jwk)?),
            Some("HS512") => Box::new(HS512.verifier_from_jwk(&jwk)?),
            Some("RS256") => Box::new(RS256.verifier_from_jwk(&jwk)?),
            Some("RS384") => Box::new(RS384.verifier_from_jwk(&jwk)?),
            Some("RS512") => Box::new(RS512.verifier_from_jwk(&jwk)?),
            Some("PS256") => Box::new(PS256.verifier_from_jwk(&jwk)?),
            Some("PS384") => Box::new(PS384.verifier_from_jwk(&jwk)?),
            Some("PS512") => Box::new(PS512.verifier_from_jwk(&jwk)?),
            Some("ES256") => Box::new(ES256.verifier_from_jwk(&jwk)?),
            Some("ES256K") => Box::new(ES256K.verifier_from_jwk(&jwk)?),
            Some("ES384") => Box::new(ES384.verifier_from_jwk(&jwk)?),
            Some("ES512") => Box::new(ES512.verifier_from_jwk(&jwk)?),
            Some("EdDSA") => Box::new(EdDSA.verifier_from_jwk(&jwk)?),
            _ => bail!("unknown algorthim."),
        };

from josekit-rs.

tgross35 avatar tgross35 commented on June 23, 2024

Thanks for confirming, I guess that is roughly what I am doing.

Would you consider adding this to the library, just to make it easier for others?

impl Jwk {
    /// Get a JWS verifier from a JWK
    fn get_verifier(&self) -> Result<Box<dyn JwsVerifier>> {
        let verifier: Box<dyn JwsVerifier> = match self.algorithm() {
            Some("HS256") => Box::new(HS256.verifier_from_jwk(&jwk)?),
            Some("HS384") => Box::new(HS384.verifier_from_jwk(&jwk)?),
            Some("HS512") => Box::new(HS512.verifier_from_jwk(&jwk)?),
            Some("RS256") => Box::new(RS256.verifier_from_jwk(&jwk)?),
            Some("RS384") => Box::new(RS384.verifier_from_jwk(&jwk)?),
            Some("RS512") => Box::new(RS512.verifier_from_jwk(&jwk)?),
            Some("PS256") => Box::new(PS256.verifier_from_jwk(&jwk)?),
            Some("PS384") => Box::new(PS384.verifier_from_jwk(&jwk)?),
            Some("PS512") => Box::new(PS512.verifier_from_jwk(&jwk)?),
            Some("ES256") => Box::new(ES256.verifier_from_jwk(&jwk)?),
            Some("ES256K") => Box::new(ES256K.verifier_from_jwk(&jwk)?),
            Some("ES384") => Box::new(ES384.verifier_from_jwk(&jwk)?),
            Some("ES512") => Box::new(ES512.verifier_from_jwk(&jwk)?),
            Some("EdDSA") => Box::new(EdDSA.verifier_from_jwk(&jwk)?),
            _ => bail!("unknown algorthim."),
        };
        Ok(verifier)
    }
}

from josekit-rs.

tgross35 avatar tgross35 commented on June 23, 2024

@hidekatsu-izuno in case yes, I added #27

from josekit-rs.

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