Thanks. I gone through the RFC 2246 and understood the Master key generation
part. The Master key is generated and able to print the client side(test C
program) using ssl strucure.
printf("session A\n");
SSL_SESSION *session = SSL_get_session(ssl);
SSL_SESSION_print(out, session);
for (i=0; i<(unsigned int)session->master_key_length; i++)
{
BIO_printf(bp,"%02X",session->master_key[i]) );
}
How i can get the same Master key in server side?
in my scenario, server side program is running in C. JDBC clients will
establish the connection to the server. will the same Mester key generated
in the cross platforms(JDBC client side)?
Any help will be great.
Thanks for your time,
Krishnamurthy
On Mon, Aug 22, 2011 at 9:03 PM, Gayathri Sundar <suraj...@gmail.com> wrote:
> Please read the RFC, it would clearly explain how the master secret is
> dervied, and from that how the read and write keys are derived. With that
> you can get to know how to extract the read n write keys. Meanwhile the read
> and wirte keys are available as part of the ssl object.
> Check that structure out.
>
> Thanks
> --Gayathri
>
> On Mon, Aug 22, 2011 at 10:24 AM, krishnamurthy santhanam <
> krishnamurth...@gmail.com> wrote:
>
>> I have more than 100 clients that will connect to my server and
>> communicate the data. I am implementing SSL on server side to authenticate
>> the client certificate(X.509) and also client will authenticate the servers
>> certificate. Once the mutual authentication has completed I have to generate
>> master key for encryption and decryption. I am going to use AES for
>> encryption and decryption.
>>
>> I had generated the client and server certificates using the bellow
>> commands and signed by the root,
>>
>> 1. CLIENT CERTIFICATE:
>>
>> openssl req -newkey rsa:1024 -sha1 -keyout clientkey.pem -out
>> clientreq.pem
>>
>> openssl x509 -req -in clientreq.pem -sha1 -extfile openssl.cnf -extensions
>> usr_cert -CA rootcert.pem -CAkey rootkey.pem -CAcreateserial -out
>> clientcert.pem
>>
>> cat clientkey.pem clientcert.pem rootcert.pem > client.pem
>>
>> openssl x509 -subject -issuer -noout -in client.pem
>>
>> 2. SERVER CERTIFICATE:
>>
>> openssl req -newkey rsa:1024 -sha1 -keyout serverkey.pem -out
>> serverreq.pem
>>
>> openssl x509 -req -in serverreq.pem -sha1 -extfile openssl.cnf -extensions
>> usr_
>>
>> cert -CA rootcert.pem -CAkey rootkey.pem -CAcreateserial -out
>> servercert.pem
>>
>> cat serverkey.pem servercert.pem rootcert.pem > server.pem
>>
>> openssl x509 -subject -issuer -noout -in server.pem
>>
>> 3. ROOT CERTIFICATE:
>>
>> openssl req -newkey rsa:1024 -sha1 -keyout rootkey.pem -out rootreq.pem
>>
>> openssl x509 -req -in rootreq.pem -sha1 -extfile root.cnf -extensions
>> v3_ca -sig
>>
>> nkey rootkey.pem -out rootcert.pem
>>
>> cat rootcert.pem rootkey.pem > root.pem
>>
>> openssl x509 -subject -issuer -noout -in root.pem
>>
>>
>>
>> Initially I am writing ssl/tls programming for server and client. In
>> this I am able to communicate the data between client and server.
>>
>> I was struck on master key generation, I have added the below LOC to
>> programs to get MASTER KEY,
>>
>> printf("session A\n");
>>
>> SSL_SESSION *session = SSL_get_session(ssl);
>>
>> SSL_SESSION_print(out, session);
>>
>> It is printing like this ,
>>
>> session A
>>
>> SSL-Session:
>>
>> Protocol : TLSv1
>>
>> Cipher : AES256-SHA
>>
>> Session-ID:
>> 9FCE46513DD74882D3FF0E0E84CC4A6BE12192B65C426E0B27D0FA15F81D7D5E
>>
>> Session-ID-ctx:
>>
>> Master-Key:
>> 56F90B0D90DEB3430207A74793C9B6565744E06ECA191D9DFA04C29B1EE2B782
>>
>> 6B602878597465F739AD69091DDF6499
>>
>> Key-Arg : None
>>
>> Krb5 Principal: None
>>
>> Compression: 1 (zlib compression)
>>
>> Start Time: 1314015355
>>
>> Timeout : 7200 (sec)
>>
>> Is this the Master key for both the server and client?
>>
>> Is this the key that should be used for the encryption in client side and
>> decryption in server side?
>>
>> If this is the Master key how can I extract the key?
>>
>> Please guide me if I understood anything wrong.
>>
>
>
