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0 Replies Latest reply: Jan 30, 2012 10:11 AM by 914106 RSS

Error verifying valid certificate chain: Violated path length constraints

914106 Newbie
Currently Being Moderated
Hi,

Recently the JSSE certificate validation has started to fail for certificate chains advertised by well known sites, namely https://mail.yahoo.com and https://foursquare.com.
Here is the exception stack trace:
sun.security.validator.ValidatorException: Violated path length constraints
at sun.security.validator.SimpleValidator.checkBasicConstraints(SimpleValidator.java:262)
at sun.security.validator.SimpleValidator.checkExtensions(SimpleValidator.java:169)
at sun.security.validator.SimpleValidator.engineValidate(SimpleValidator.java:154)
at sun.security.validator.Validator.validate(Validator.java:218)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)


I've inspected the certificate chains, and in all cases, the basic constraint has a valid value.
Is there a known bug in JSSE that does not handle basic constraint properly?

I've reviewed the online version of source code for SimpleValidator however that version seems to be not consistent with latest JRE 6 update (30).

The validation error can be consistently reproduced with the following code snippet:

<code>
X509Certificate[] chain = ... ; // server certificate chain
String authType = ...; // the authentication type used by certificate chain
// The attached example uses "RSA"

TrustManagerFactory tmf = TrustManagerFactory.getInstance( "SunX509", "SunJSSE" );
tmf.init( (KeyStore) null );
TrustManager[] tms = tmf.getTrustManagers();
for( TrustManager tm : tms ) {
if( tm instanceof X509TrustManager ) {
( (X509TrustManager) tm ).checkServerTrusted( chain, authType );
}
</code>


For convenience, I'm including the PEM certificate chain that failed verification and the code to load that chain into JSSE:

=============================================

<code>
String certFilePath = ... ; // a path to a PEM encoded certificate chain

InputStream fis = new FileInputStream( new File( certFilePath ) );
CertificateFactory cf = CertificateFactory.getInstance( "X.509" );
Collection< ? extends Certificate > certChain = cf.generateCertificates( fis );

X509Certificate[] chain = new X509Certificate[ certChain.size() ];
int i = 0;
for( Certificate cert : certChain ) {
chain[ i++ ] = (X509Certificate) cert;
}
</code>

============================
Certificate chain from https://mail.yahoo.com
============================

<file>
-----BEGIN CERTIFICATE-----
MIIGOzCCBSOgAwIBAgIQD1hJQVLDNUtt6+cgnnJuZzANBgkqhkiG9w0BAQUFADBm
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIGVTCCBT2gAwIBAgIQCFH5WYFBRcq94CTiEsnCDjANBgkqhkiG9w0BAQUFADBs
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIETzCCA7igAwIBAgIEBydYPTANBgkqhkiG9w0BAQUFADB1MQswCQYDVQQGEwJV
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----
</file>

Edited by: 911103 on Jan 30, 2012 10:11 AM

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