pub fn verifier_from_pem(
        &self,
        input: impl AsRef<[u8]>,
    ) -> Result<RsassaPssJwsVerifier, JoseError> {
        (|| -> anyhow::Result<RsassaPssJwsVerifier> {
            let (alg, data) = util::parse_pem(input.as_ref())?;
            let public_key = match alg.as_str() {
                "PUBLIC KEY" => match RsaPssKeyPair::detect_pkcs8(&data, true) {
                    Some((hash, mgf1_hash, salt_len)) => {
                        if hash != self.hash_algorithm() {
                            bail!("The message digest parameter is mismatched: {}", hash);
                        } else if mgf1_hash != self.hash_algorithm() {
                            bail!(
                                "The mgf1 message digest parameter is mismatched: {}",
                                mgf1_hash
                            );
                        } else if salt_len != self.salt_len() {
                            bail!("The salt size is mismatched: {}", salt_len);
                        }

                        PKey::public_key_from_der(&data)?
                    }
                    None => bail!("Invalid PEM contents."),
                },
                "RSA PUBLIC KEY" => {
                    let pkcs8 = RsaPssKeyPair::to_pkcs8(
                        &data,
                        true,
                        self.hash_algorithm(),
                        self.hash_algorithm(),
                        self.salt_len(),
                    );
                    PKey::public_key_from_der(&pkcs8)?
                }
                alg => bail!("Inappropriate algorithm: {}", alg),
            };

            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: None,
            })
        })()
        .map_err(|err| JoseError::InvalidKeyFormat(err))
    }
/// Return a verifier from a key of common or traditional PEM format.
///
/// Common PEM format is a DER and base64 encoded SubjectPublicKeyInfo
/// that surrounded by "-----BEGIN/END PUBLIC KEY----".
///
/// Traditional PEM format is a DER and base64 SubjectPublicKeyInfo or PKCS#1 RSAPublicKey
/// that surrounded by "-----BEGIN/END RSA-PSS/RSA PUBLIC KEY----".
///
/// # Arguments
/// * `input` - A public key of common or traditional PEM format.
Return a verifier from a key of common or traditional PEM format.
Common PEM format is a DER and base64 encoded SubjectPublicKeyInfo
that surrounded by "BEGIN/END PUBLIC KEY----".


Return a verifier from a key of common or traditional PEM format . Common PEM format is a DER and base64 encoded SubjectPublicKeyInfo that surrounded by " BEGIN / END PUBLIC KEY ---- " .
pub fn verifier_from_pem(
        &self,
        input: impl AsRef<[u8]>,
    ) -> Result<RsassaPssJwsVerifier, JoseError> {
        (|| -> anyhow::Result<RsassaPssJwsVerifier> {
            let (alg, data) = util::parse_pem(input.as_ref())?;
            let public_key = match alg.as_str() {
                "PUBLIC KEY" => match RsaPssKeyPair::detect_pkcs8(&data, true) {
                    Some((hash, mgf1_hash, salt_len)) => {
                        if hash != self.hash_algorithm() {
                            bail!("The message digest parameter is mismatched: {}", hash);
                        } else if mgf1_hash != self.hash_algorithm() {
                            bail!(
                                "The mgf1 message digest parameter is mismatched: {}",
                                mgf1_hash
                            );
                        } else if salt_len != self.salt_len() {
                            bail!("The salt size is mismatched: {}", salt_len);
                        }
                        PKey::public_key_from_der(&data)?
                    }
                    None => bail!("Invalid PEM contents."),
                },
                "RSA PUBLIC KEY" => {
                    let pkcs8 = RsaPssKeyPair::to_pkcs8(
                        &data,
                        true,
                        self.hash_algorithm(),
                        self.hash_algorithm(),
                        self.salt_len(),
                    );
                    PKey::public_key_from_der(&pkcs8)?
                }
                alg => bail!("Inappropriate algorithm: {}", alg),
            };
            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: None,
            })
        })()
        .map_err(|err| JoseError::InvalidKeyFormat(err))
    }
pub fn verifier_from_pem ( & self , input : impl AsRef < [ u8 ] > , ) -> Result < RsassaPssJwsVerifier , JoseError > { ( | | -> anyhow :: Result < RsassaPssJwsVerifier > { let ( alg , data ) = util :: parse_pem ( input . as_ref ( ) ) ? ; let public_key = match alg . as_str ( ) { " " => match RsaPssKeyPair :: detect_pkcs8 ( & data , true ) { Some ( ( hash , mgf1_hash , salt_len ) ) => { if hash != self . hash_algorithm ( ) { bail ! ( " " hash ) ; } else if mgf1_hash != self . hash_algorithm ( ) { bail ! ( " " mgf1_hash ) ; } else if salt_len != self . salt_len ( ) { bail ! ( " " salt_len ) ; } PKey :: public_key_from_der ( & data ) ? } None => bail ! ( " " ) , } , " " => { let pkcs8 = RsaPssKeyPair :: to_pkcs8 ( & data , true , self . hash_algorithm ( ) , self . hash_algorithm ( ) , self . salt_len ( ) , ) ; PKey :: public_key_from_der ( & pkcs8 ) ? } alg => bail ! ( " " alg ) , } ; let rsa = public_key . rsa ( ) ? ; if rsa . size ( ) * 8 < 2048 { bail ! ( " " ) ; } Ok ( RsassaPssJwsVerifier { algorithm : self . clone ( ) , public_key , key_id : None , } ) } ) ( ) . map_err ( | err | JoseError :: InvalidKeyFormat ( err ) ) }
Return a verifier from a key of common or traditional PEM format.
Return a verifier from a key of common or traditional PEM format .
&self
input
impl AsRef<[u8]>
&self
input
impl AsRef<[u8]>