Hi Kyle,

CA certificate chain is parsed properly. I also tried using only
RootCA(excluding intermediate CA's). Even with this I am getting the same
error. 
Could you please explain this:
client.crt also needs to have extendedKeyUsage of
"clientAuthentication" and keyUsage of "encipherment" and "key
negotiation" 

Prathima



wolfoftheair wrote:
> 
> This is not an Apache support mailing list, and so these suggestions
> are necessarily general in nature.
> 
> Check to make sure that the PEM-encoded certificates in cachain.crt
> are properly separated.  If there's a single line that says "=====END
> X509 CERTIFICATE==========BEGIN X509 CERTIFICATE=====", then it will
> not be parsed correctly.
> 
> Also, cachain.crt should only need to hold ROOTCA, not necessarily all 3.
> 
> Plus, make sure that ROOTCA is currently valid, that CA1 is currently
> valid, that CA2 is currently valid, and that client.crt is currently
> valid; client.crt also needs to have extendedKeyUsage of
> "clientAuthentication" and keyUsage of "encipherment" and "key
> negotiation".
> 
> For more information, please see RFC 3280 (for help decoding the
> certificates and their semantics); openssl x509 -noout -text will be
> your friend here (though you will need to split up cachain.crt into
> its individual certificates to be able to print their properties.
> 
> Good luck!
> 
> -Kyle H
> 
> On Tue, Mar 24, 2009 at 12:48 AM, prathima <prathima.gog...@polycom.com>
> wrote:
>>
>> I am using Apache server for HTTPS connection with client.
>> I had generated client certificate signed by an intermediate CA(CA1),
>> which
>> is further signed by an intermediate CA(CA2). CA2 is signed by a ROOTCA.
>> I  loaded chain of certificates on client excluding ROOTCA(i.e.,
>> clientcert+CA1+CA2).
>> Configuration on Apache server:
>> SSLCertificateFile      server.crt
>> SSLCertificateKeyFile   server.key
>> SSLCACertificateFile    cachain.crt [i.e, ROOTCA+CA1+CA2]
>> SSLVerifyClient         require
>> SSLVerifyDepth          3
>>
>> With the above setup, server terminated MutualTLS connection saying:
>> error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca
>>
>> Could someone help me in solving the above problem?
>>
>>
>>
>>
>>
>>
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>>
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