pub fn verifier_from_jwk(&self, jwk: &Jwk) -> Result<RsassaPssJwsVerifier, JoseError> {
        (|| -> anyhow::Result<RsassaPssJwsVerifier> {
            match jwk.key_type() {
                val if val == "RSA" => {}
                val => bail!("A parameter kty must be RSA: {}", val),
            };
            match jwk.key_use() {
                Some(val) if val == "sig" => {}
                None => {}
                Some(val) => bail!("A parameter use must be sig: {}", val),
            };
            if !jwk.is_for_key_operation("verify") {
                bail!("A parameter key_ops must contains verify.");
            }
            match jwk.algorithm() {
                Some(val) if val == self.name() => {}
                None => {}
                Some(val) => bail!("A parameter alg must be {} but {}", self.name(), val),
            }
            let n = match jwk.parameter("n") {
                Some(Value::String(val)) => base64::decode_config(val, base64::URL_SAFE_NO_PAD)?,
                Some(_) => bail!("A parameter n must be a string."),
                None => bail!("A parameter n is required."),
            };
            let e = match jwk.parameter("e") {
                Some(Value::String(val)) => base64::decode_config(val, base64::URL_SAFE_NO_PAD)?,
                Some(_) => bail!("A parameter e must be a string."),
                None => bail!("A parameter e is required."),
            };

            let mut builder = DerBuilder::new();
            builder.begin(DerType::Sequence);
            {
                builder.append_integer_from_be_slice(&n, false); // n
                builder.append_integer_from_be_slice(&e, false); // e
            }
            builder.end();

            let pkcs8 = RsaPssKeyPair::to_pkcs8(
                &builder.build(),
                true,
                self.hash_algorithm(),
                self.hash_algorithm(),
                self.salt_len(),
            );
            let public_key = PKey::public_key_from_der(&pkcs8)?;
            let key_id = jwk.key_id().map(|val| val.to_string());

            let rsa = public_key.rsa()?;
            if rsa.size() * 8 < 2048 {
                bail!("key length must be 2048 or more.");
            }

            Ok(RsassaPssJwsVerifier {
                algorithm: self.clone(),
                public_key,
                key_id,
            })
        })()
        .map_err(|err| JoseError::InvalidKeyFormat(err))
    }
/// Return a verifier from a public key that is formatted by a JWK of RSA type.
///
/// # Arguments
/// * `jwk` - A public key that is formatted by a JWK of RSA type.
Return a verifier from a public key that is formatted by a JWK of RSA type.
Return a verifier from a public key that is formatted by a JWK of RSA type .
pub fn verifier_from_jwk(&self, jwk: &Jwk) -> Result<RsassaPssJwsVerifier, JoseError> {
        (|| -> anyhow::Result<RsassaPssJwsVerifier> {
            match jwk.key_type() {
                val if val == "RSA" => {}
                val => bail!("A parameter kty must be RSA: {}", val),
            };
            match jwk.key_use() {
                Some(val) if val == "sig" => {}
                None => {}
                Some(val) => bail!("A parameter use must be sig: {}", val),
            };
            if !jwk.is_for_key_operation("verify") {
                bail!("A parameter key_ops must contains verify.");
            }
            match jwk.algorithm() {
                Some(val) if val == self.name() => {}
                None => {}
                Some(val) => bail!("A parameter alg must be {} but {}", self.name(), val),
            }
            let n = match jwk.parameter("n") {
                Some(Value::String(val)) => base64::decode_config(val, base64::URL_SAFE_NO_PAD)?,
                Some(_) => bail!("A parameter n must be a string."),
                None => bail!("A parameter n is required."),
            };
            let e = match jwk.parameter("e") {
                Some(Value::String(val)) => base64::decode_config(val, base64::URL_SAFE_NO_PAD)?,
                Some(_) => bail!("A parameter e must be a string."),
                None => bail!("A parameter e is required."),
            };
            let mut builder = DerBuilder::new();
            builder.begin(DerType::Sequence);
            {
                builder.append_integer_from_be_slice(&n, false); // n
                builder.append_integer_from_be_slice(&e, false); // e
            }
            builder.end();
            let pkcs8 = RsaPssKeyPair::to_pkcs8(
                &builder.build(),
                true,
                self.hash_algorithm(),
                self.hash_algorithm(),
                self.salt_len(),
            );
            let public_key = PKey::public_key_from_der(&pkcs8)?;
            let key_id = jwk.key_id().map(|val| val.to_string());
            let rsa = public_key.rsa()?;
            if rsa.size() * 8 < 2048 {
                bail!("key length must be 2048 or more.");
            }
            Ok(RsassaPssJwsVerifier {
                algorithm: self.clone(),
                public_key,
                key_id,
            })
        })()
        .map_err(|err| JoseError::InvalidKeyFormat(err))
    }
pub fn verifier_from_jwk ( & self , jwk : & Jwk ) -> Result < RsassaPssJwsVerifier , JoseError > { ( | | -> anyhow :: Result < RsassaPssJwsVerifier > { match jwk . key_type ( ) { val if val == " " => { } val => bail ! ( " " val ) , } ; match jwk . key_use ( ) { Some ( val ) if val == " " => { } None => { } Some ( val ) => bail ! ( " " val ) , } ; if ! jwk . is_for_key_operation ( " " ) { bail ! ( " " ) ; } match jwk . algorithm ( ) { Some ( val ) if val == self . name ( ) => { } None => { } Some ( val ) => bail ! ( " " self name ( ) val ) , } let n = match jwk . parameter ( " " ) { Some ( Value :: String ( val ) ) => base64 :: decode_config ( val , base64 :: URL_SAFE_NO_PAD ) ? , Some ( _ ) => bail ! ( " " ) , None => bail ! ( " " ) , } ; let e = match jwk . parameter ( " " ) { Some ( Value :: String ( val ) ) => base64 :: decode_config ( val , base64 :: URL_SAFE_NO_PAD ) ? , Some ( _ ) => bail ! ( " " ) , None => bail ! ( " " ) , } ; let mut builder = DerBuilder :: new ( ) ; builder . begin ( DerType :: Sequence ) ; { builder . append_integer_from_be_slice ( & n , false ) ; // n builder . append_integer_from_be_slice ( & e , false ) ; // e } builder . end ( ) ; let pkcs8 = RsaPssKeyPair :: to_pkcs8 ( & builder . build ( ) , true , self . hash_algorithm ( ) , self . hash_algorithm ( ) , self . salt_len ( ) , ) ; let public_key = PKey :: public_key_from_der ( & pkcs8 ) ? ; let key_id = jwk . key_id ( ) . map ( | val | val . to_string ( ) ) ; let rsa = public_key . rsa ( ) ? ; if rsa . size ( ) * 8 < 2048 { bail ! ( " " ) ; } Ok ( RsassaPssJwsVerifier { algorithm : self . clone ( ) , public_key , key_id , } ) } ) ( ) . map_err ( | err | JoseError :: InvalidKeyFormat ( err ) ) }
Return a verifier from a public key that is formatted by a JWK of RSA type.
Return a verifier from a public key that is formatted by a JWK of RSA type .
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&self
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&Jwk