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use flate2::read::DeflateDecoder; use openssl::x509::X509; use quick_xml::de::from_str as from_xml_str; use serde::Deserialize; use std::io::Read; use crate::{ error::{Error, Result}, idp::IdentityProvider, }; #[derive(Deserialize)] pub struct AttributeValue { #[serde(rename = "xsi:type")] pub typ: String, #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct Attribute { #[serde(rename = "Name")] pub name: String, #[serde(rename = "NameFormat")] pub name_format: String, #[serde(rename = "AttributeValue")] pub attribute_values: Vec<AttributeValue>, } #[derive(Deserialize)] pub struct AttributeStatement { #[serde(rename = "Attribute")] pub attributes: Vec<Attribute>, } #[derive(Deserialize)] pub struct AuthnContextClassRef { #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct AuthnContext { #[serde(rename = "AuthnContextClassRef")] pub authn_context_class_ref: AuthnContextClassRef, } #[derive(Deserialize)] pub struct AuthnStatement { #[serde(rename = "AuthnInstant")] pub authn_instant: String, #[serde(rename = "SessionNotOnOrAfter")] pub session_not_on_or_after: String, #[serde(rename = "SessionIndex")] pub session_index: String, #[serde(rename = "AuthnContext")] pub authn_context: AuthnContext, } #[derive(Deserialize)] pub struct Audience { #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct AudienceRestriction { #[serde(rename = "Audience")] pub audience: Audience, } #[derive(Deserialize)] pub struct Conditions { #[serde(rename = "NotBefore")] pub not_before: String, #[serde(rename = "NotOnOrAfter")] pub not_on_or_after: String, #[serde(rename = "AudienceRestriction")] pub audience_restriction: AudienceRestriction, } #[derive(Deserialize)] pub struct SubjectConfirmationData { #[serde(rename = "NotOnOrAfter")] pub not_on_or_after: String, #[serde(rename = "Recipient")] pub recipient: String, #[serde(rename = "InResponseTo")] pub in_response_to: String, } #[derive(Deserialize)] pub struct SubjectConfirmation { #[serde(rename = "Method")] pub method: String, #[serde(rename = "SubjectConfirmationData")] pub subject_confirmation_data: SubjectConfirmationData, } #[derive(Deserialize)] pub struct NameID { #[serde(rename = "SPNameQualifier")] pub sp_name_qualifier: Option<String>, #[serde(rename = "Format")] pub format: String, #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct Subject { #[serde(rename = "NameID")] pub name_id: NameID, #[serde(rename = "SubjectConfirmation")] pub subject_confirmation: SubjectConfirmation, } #[derive(Deserialize)] pub struct StatusCode { #[serde(rename = "Value")] pub value: String, } #[derive(Deserialize)] pub struct Status { #[serde(rename = "StatusCode")] pub status_code: StatusCode, } #[derive(Deserialize)] pub struct X509Certificate { #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct X509Data { #[serde(rename = "X509Certificate")] pub x509_certificate: X509Certificate, } #[derive(Deserialize)] pub struct KeyInfo { #[serde(rename = "xmlns:ds")] pub ds: Option<String>, #[serde(rename = "X509Data")] pub x509_data: X509Data, } #[derive(Deserialize)] pub struct SignatureValue { #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct DigestValue { #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct DigestMethod { #[serde(rename = "Algorithm")] pub algorithm: String, } #[derive(Deserialize)] pub struct Transform { #[serde(rename = "Algorithm")] pub algorithm: String, } #[derive(Deserialize)] pub struct Transforms { #[serde(rename = "Transform")] pub transforms: Vec<Transform>, } #[derive(Deserialize)] pub struct Reference { #[serde(rename = "URI")] pub uri: String, #[serde(rename = "Transforms")] pub transforms: Transforms, #[serde(rename = "DigestMethod")] pub digest_method: DigestMethod, #[serde(rename = "DigestValue")] pub digest_value: DigestValue, } #[derive(Deserialize)] pub struct SignatureMethod { #[serde(rename = "Algorithm")] pub algorithm: String, } #[derive(Deserialize)] pub struct CanonicalizationMethod { #[serde(rename = "Algorithm")] pub algorithm: String, } #[derive(Deserialize)] pub struct SignedInfo { #[serde(rename = "CanonicalizationMethod")] pub canonicalization_method: CanonicalizationMethod, #[serde(rename = "SignatureMethod")] pub signature_method: SignatureMethod, #[serde(rename = "Reference")] pub reference: Reference, } #[derive(Deserialize)] pub struct Signature { #[serde(rename = "xmlns:ds")] pub ds: Option<String>, #[serde(rename = "SignedInfo")] pub signed_info: SignedInfo, #[serde(rename = "SignatureValue")] pub signature_value: SignatureValue, #[serde(rename = "KeyInfo")] pub key_info: KeyInfo, } #[derive(Deserialize)] pub struct Issuer { #[serde(rename = "$value")] pub value: String, } #[derive(Deserialize)] pub struct Assertion { #[serde(rename = "xmlns:xsi")] pub xsi: Option<String>, #[serde(rename = "xmlns:xs")] pub xs: Option<String>, #[serde(rename = "ID")] pub id: String, #[serde(rename = "Version")] pub version: String, #[serde(rename = "IssueInstant")] pub issue_instant: String, #[serde(rename = "Issuer")] pub issuer: Issuer, #[serde(rename = "Signature")] pub signature: Option<Signature>, #[serde(rename = "Subject")] pub subject: Subject, #[serde(rename = "Conditions")] pub conditions: Conditions, #[serde(rename = "AuthnStatement")] pub authn_statement: AuthnStatement, #[serde(rename = "AttributeStatement")] pub attribute_statement: AttributeStatement, } #[derive(Deserialize)] #[serde(rename = "samlp:Response")] pub struct Response { #[serde(rename = "xmlns:samlp")] pub samlp: String, #[serde(rename = "xmlns:saml")] pub saml: String, #[serde(rename = "ID")] pub id: String, #[serde(rename = "Version")] pub version: String, #[serde(rename = "IssueInstant")] pub issue_instant: String, #[serde(rename = "Destination")] pub destination: String, #[serde(rename = "InResponseTo")] pub in_response_to: String, #[serde(rename = "Issuer")] pub issuer: Issuer, #[serde(rename = "Signature")] pub signature: Option<Signature>, #[serde(rename = "Status")] pub status: Status, #[serde(rename = "Assertion")] pub assertion: Assertion, } pub fn decode_authn_response(encoded: &str) -> Result<String> { let deflated = base64::decode(encoded).map_err(|err| { Error::InvalidResponse(format!("SAMLResponse is not encoded to base64: {}", err)) })?; String::from_utf8(deflated).map_err(|err| { Error::InvalidResponse(format!("SAMLResponse contains invalid chars: {}", err)) }) } pub fn decode_inflate_authn_response(deflated_encoded: &str) -> Result<String> { let deflated = base64::decode(deflated_encoded).map_err(|err| { Error::InvalidResponse(format!("SAMLResponse is not encoded to base64: {}", err)) })?; let mut inflater = DeflateDecoder::new(deflated.as_slice()); let mut inflated = String::new(); inflater.read_to_string(&mut inflated)?; Ok(inflated) } impl IdentityProvider { pub fn authn_response(&self, xml: &str) -> Result<Response> { let response = from_xml_str::<Response>(xml)?; if let Some(signature) = response.signature.as_ref() { let cert = X509::from_pem( format!( "-----BEGIN CERTIFICATE-----\n{}\n-----END CERTIFICATE-----", signature.key_info.x509_data.x509_certificate.value ) .as_bytes(), )?; let mut is_valid = false; for public_key in self.certificates.iter() { if cert.verify(public_key.public_key()?.as_ref())? { is_valid = true; break; } } if !is_valid { return Err(Error::InvalidCert( "SAML response contains invalid cert".into(), )); } } Ok(response) } }