Aladin Astronomy Software - Java Problem

[eve7]

Hey all,

I am running Fedora 35 Workstation. I have downloaded
java-1.8.0-openjdk.x86_64 and
java-11-openjdk.x86_64 to run Aladin Software.

My question is kind of exactly the same question given by this:

Java Crypto-Policies - Aladin Sky Atlas

Hi to everyone I hoper everything is going fine for you. I’m using Fedora 33 with the spin dedicated to Astronomy (Fedora Labs) and I’m trying to use a software called Aladin Sky Atlas (https://aladin.u-strasbg.fr/). This software is designed to run with Java, and the version that I have installed is openjdk version “11.0.10” 2021-01-19. So, the problem is that when I try to run Aladin Aplication, the Konsole show me the following error messages : Aladin (v11.024) is starting… Aladin is dev…

My error is something like this:

Aladin is developed by Pierre Fernique, Thomas Boch, Anaïs Oberto, François Bonnarel and Chaitra
  (c) 2020 Université de Strasbourg/CNRS - developed by CDS, distributed under GPLv3
Your JVM release is java 11.0.13 / Red Hat, Inc.
Caching not available for [https://vizier.cds.unistra.fr/viz-bin/asu-xml/V1.1?-meta.aladin=all] !!!
metaDataQuery : javax.net.ssl.SSLHandshakeException: Certificates do not conform to algorithm constraints
javax.net.ssl.SSLHandshakeException: Certificates do not conform to algorithm constraints
	at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:131)
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:349)
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:292)
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:287)
	at java.base/sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(CertificateMessage.java:1357)
	at java.base/sun.security.ssl.CertificateMessage$T13CertificateConsumer.onConsumeCertificate(CertificateMessage.java:1232)
	at java.base/sun.security.ssl.CertificateMessage$T13CertificateConsumer.consume(CertificateMessage.java:1175)
	at java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:392)
	at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:443)
	at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:421)
	at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:182)
	at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:172)
	at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1426)
	at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1336)
	at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:450)
	at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:421)
	at java.base/sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:572)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:197)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1592)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1520)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:250)
	at cds.tools.Util.openConnectionCheckRedirects1(Util.java:277)
	at cds.tools.Util.access$000(Util.java:126)
	at cds.tools.Util$OpenConnection.run(Util.java:254)
Caused by: java.security.cert.CertificateException: Certificates do not conform to algorithm constraints
	at java.base/sun.security.ssl.AbstractTrustManagerWrapper.checkAlgorithmConstraints(SSLContextImpl.java:1681)
	at java.base/sun.security.ssl.AbstractTrustManagerWrapper.checkAdditionalTrust(SSLContextImpl.java:1606)
	at java.base/sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:1550)
	at java.base/sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(CertificateMessage.java:1341)
	... 19 more
Caused by: java.security.cert.CertPathValidatorException: Algorithm constraints check failed on signature algorithm: SHA1withRSA
	at java.base/sun.security.provider.certpath.AlgorithmChecker.check(AlgorithmChecker.java:237)
	at java.base/sun.security.ssl.AbstractTrustManagerWrapper.checkAlgorithmConstraints(SSLContextImpl.java:1677)
	... 22 more
VizieR meta query error javax.net.ssl.SSLHandshakeException: Certificates do not conform to algorithm constraints

The given answers to that problem suggests to change the crypto-policies, however I do not want to to that for the security reasons. So is there any other way to solve the problem…? Is it safe to change the crypto-policies …?

[alciregi (Alessio)]

You have two choices:

• change the crypto-policies on your system, yes^[1]
• ask to and hope that Aladin folks deploy a more modern certificate

---

1. for the security reasons: it doesn’t expose your system to external attacks, but it simply allow to accept less secure certificates signed with deprecated and weak algorithms. If you are concerned, the alternative you have is to not use sites and services that provides such certificates. ↩︎

[eve7]

Well I’ll try to contact with them. Hope they can manage to change something…

[eve7]

Hey again, I have asked them, however no reply so far. I wonder if the problem cannot be due to my browser or browser settings, right?