java - Signature trust establishment failed for SAML metadata entry

Question

In order to fetch metadata from a remote source, I defined an ExtendedMetadataDelegate bean as follows:

@Bean
@Qualifier("replyMeta")
public ExtendedMetadataDelegate replyMetadataProvider() throws MetadataProviderException {
    String metadataURL = "https://ststest.mydomain.it/FederationMetadata/2007-06/FederationMetadata.xml";
    final Timer backgroundTaskTimer = new Timer(true);
    HTTPMetadataProvider provider = new HTTPMetadataProvider(
            backgroundTaskTimer, httpClient(), metadataURL);
    provider.setParserPool(parserPool());
    ExtendedMetadataDelegate emd = new ExtendedMetadataDelegate(
            provider, new ExtendedMetadata());
    return emd;
}

To ensure the signature trust establishment, I added the related key both in JDK keystore and application keystore (the second step might not be enough); despite that, an error occurs by running the webapp.

[2014-08-18 14:36:47.200] boot - 6000 DEBUG [localhost-startStop-1] --- SignatureValidator: Attempting to validate signature using key from supplied credential
[2014-08-18 14:36:47.200] boot - 6000 DEBUG [localhost-startStop-1] --- SignatureValidator: Creating XMLSignature object
[2014-08-18 14:36:47.206] boot - 6000 DEBUG [localhost-startStop-1] --- SignatureValidator: Validating signature with signature algorithm URI: http://www.w3.org/2001/04/xmldsig-more#rsa-sha256
[2014-08-18 14:36:47.207] boot - 6000 DEBUG [localhost-startStop-1] --- SignatureValidator: Validation credential key algorithm 'RSA', key instance class 'sun.security.rsa.RSAPublicKeyImpl'
[2014-08-18 14:36:47.329] boot - 6000 DEBUG [localhost-startStop-1] --- SignatureValidator: Signature validated with key from supplied credential
[2014-08-18 14:36:47.329] boot - 6000 DEBUG [localhost-startStop-1] --- BaseSignatureTrustEngine: Signature validation using candidate credential was successful
[2014-08-18 14:36:47.330] boot - 6000 DEBUG [localhost-startStop-1] --- BaseSignatureTrustEngine: Successfully verified signature using KeyInfo-derived credential
[2014-08-18 14:36:47.330] boot - 6000 DEBUG [localhost-startStop-1] --- BaseSignatureTrustEngine: Attempting to establish trust of KeyInfo-derived credential
[2014-08-18 14:36:47.330] boot - 6000 DEBUG [localhost-startStop-1] --- BasicX509CredentialNameEvaluator: Supplied trusted names are null or empty, skipping name evaluation
[2014-08-18 14:36:47.331] boot - 6000 DEBUG [localhost-startStop-1] --- MetadataCredentialResolver: Attempting PKIX path validation on untrusted credential: [subjectName='CN=ADFS Signing - ststest-replynet.reply.it']
[2014-08-18 14:36:47.346] boot - 6000 ERROR [localhost-startStop-1] --- MetadataCredentialResolver: PKIX path construction failed for untrusted credential: [subjectName='CN=ADFS Signing - ststest-replynet.reply.it']: unable to find valid certification path to requested target
[2014-08-18 14:36:47.347] boot - 6000 DEBUG [localhost-startStop-1] --- PKIXSignatureTrustEngine: Signature trust could not be established via PKIX validation of signing credential
[2014-08-18 14:36:47.347] boot - 6000 DEBUG [localhost-startStop-1] --- BaseSignatureTrustEngine: Failed to establish trust of KeyInfo-derived credential
[2014-08-18 14:36:47.347] boot - 6000 DEBUG [localhost-startStop-1] --- BaseSignatureTrustEngine: Failed to verify signature and/or establish trust using any KeyInfo-derived credentials
[2014-08-18 14:36:47.347] boot - 6000 DEBUG [localhost-startStop-1] --- PKIXSignatureTrustEngine: PKIX validation of signature failed, unable to resolve valid and trusted signing key
[2014-08-18 14:36:47.347] boot - 6000 ERROR [localhost-startStop-1] --- SignatureValidationFilter: Signature trust establishment failed for metadata entry http://ststest-replynet.reply.it/adfs/services/trust
[2014-08-18 14:36:47.349] boot - 6000 ERROR [localhost-startStop-1] --- AbstractReloadingMetadataProvider: Error filtering metadata from https://ststest-replynet.reply.it/FederationMetadata/2007-06/FederationMetadata.xml
org.opensaml.saml2.metadata.provider.FilterException: Signature trust establishment failed for metadata entry

The error disappears by setting:

emd.setMetadataTrustCheck(false); 

... but I'd like to check used metadata.

Is there a way to resolve this error?

---

Update:

I tried to setup the ExtendedMetadata as follows but the error persists.

em.setAlias("defaultAlias");
em.setSigningKey("*.mydomain.it (Go Daddy Secure Certification Authority)");

Answer 1

You have most likely imported the HTTPS certificate, but not the certificate which is used to create the signature - they differ. You should:

1. Create file signature.cer with the following content taken from the metadata:

   -----BEGIN CERTIFICATE-----
   MIIC7jCCAdagAwIBAgIQa+pSaOoDP6ZL3qAi564CxzANBgkqhkiG9w0BAQs
   FADAzMTEwLwYDVQQDEyhBREZTIFNpZ25pbmcgLSBzdHN0ZXN0LXJlcGx5bm
   V0LnJlcGx5Lml0MB4XDTE0MDQyMTAwMzUyNVoXDTE1MDQyMTAwMzUyNVowM
   zExMC8GA1UEAxMoQURGUyBTaWduaW5nIC0gc3RzdGVzdC1yZXBseW5ldC5y
   ZXBseS5pdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAJyI7Se
   +UGGHOGRcwHF8LrmivtcPJyNKyicPJ8UJ8pIsEmgYBnJIrpS05RkYtdUdk+
   aumDlc3ACt23FxGDLy9hkJJlRbZwklzh4W3RqGC3W5Y+t7KeIuB8d7ZrrLb
   2AoJpVHICRagsLjjHMwz9sJUt+PZdUFFc0pZckHba3TY2Y+MgPYVsyjlEkf
   QrwL0ggh23g9Pe1VQ9HaInXZvwVMGWZ1oL4Uk0cW11URa8x53ZOWMQSsksi
   MUlquItssiuJjRnI9Df+GaDxbQJi51esY2EF1o2JxqGJSA71Apy9EahDho8
   eFkfOS0fYbVNBU5X/Wn7BKsf2Rmg3r6mQM94+gAA8CAwEAATANBgkqhkiG9
   w0BAQsFAAOCAQEAIX5FEt5JWtINzy4C0LtTtta3DMOsLIBH3raRr53+6MKG
   sPP75VAt7fYUutopuk5Y2o++sVPuEuTzcogz5Dj8eglDESkPwR0PrlClVcG
   FLFEx9qOOidYIEa90g462niIOgkNkIpb1JRrmZEFo+yrYYdFSR2iXzC3O1f
   7JAhNwi+d4a8cOTrqynqL6p1z+hiWEub39FlWDPacELw9HSDIYY151hiiPz
   vIRQDBOjDg3Ws8fRwYNjJH4ElwjP2z+1r+sktD/kkh8jj3iWhT37JnQG72D
   7c63ovYICwEZUqS4L3vepO0pv6xewkUbfX4KBQbUPaVVgmVUcSecj85mvMx
   42g==
   -----END CERTIFICATE-----
   

2. Import the certificate to your samlKeystore.jks with:

    keytool -importcert -alias adfssigning -keystore samlKeystore.jks -file signature.cer
   

This should be all you need, just restart Tomcat and your metadata loading should now pass.

You don't need to include the HTTPS certificate in your JDK's cacerts in case you include the following bean which configures the HTTP client (available in Spring SAML 1.0.0.RELEASE):

 <bean class="org.springframework.security.saml.trust.httpclient.TLSProtocolConfigurer"/>