Error in the example with Tiva C and wolfssl lib

Dionisio Ramirez Prieto

Hello

I am starting with the example:

tcpEchoTLS_EK_TM4C1294XL_TI_TivaTM4C1294NCPDT

I am using a Tiva C EK-TMC1294XL (with no crypto) and after following all the set up instructions for the installation of the WolfSSL library and after to import and to build successfully the example, I got this error when I try to run the code (one colleague is using the crypto version and he gets the same error):

CONSOLE:

n flash
Starting the TLS/TCP Echo example
System provider is set to SysMin. Halt the target to view any SysMin contents in ROV.
Service Status: DHCPC : Enabled : : 000
Service Status: DHCPC : Enabled : Running : 000
tcpHandler: Error loading ca_cert_der_2048 please check the wolfssl/certs_test.h file.

Neverttheless, I have reviewed the project and I can see space reserved for the certificate in the map file:

.const 0 00023420 00006b64

...

00027cfc 000004ae tcpEchoTLS.obj (.const:.string:ca_cert_der_2048)

I've included the certs_test.h file itself into the project but even so I get the same error.

Please, can anybody help me out?

Thanks in advance

Dionisio

over 9 years ago

0 Vikram Adiga over 9 years ago

TI__Genius 10825 points

Dionisio,

Which version of TI-RTOS and WolfSSL are you using? The instructions for using WolfSSL with TI-RTOS are documented in this wiki. Can you have a look at instructions? We have validated the instructions for tcpEchoTLS example with the recently released TI-RTOS for TivaC 2.14.04.31 and WolfSSL 3.7.0.

Thanks,

Vikram

0 Dionisio Ramirez Prieto over 9 years ago in reply to Vikram Adiga

Intellectual 780 points

Hi Vikram

The version of my TI-RTOS is: tirtos_tivac_2_14_00_10

The Wolfssl version I have used is: wolfssl-3.6.8

My colleague and I (without contact between us) have carefully followed the instructions of this TI web page:

http://processors.wiki.ti.com/index.php/Using_wolfSSL_with_TI-RTOS (the same as you)

We have got, separately, exactly the same error.

Thank you.

Dionisio

0 Vikram Adiga over 9 years ago in reply to Dionisio Ramirez Prieto

TI__Genius 10825 points

Dionisio,

I think the error you are seeing is because the "CURRENTTIME" macro in tcpEchoTLS.c is not updated. As noted in the example's readme.txt, this macro has to be updated so that the SSL library can validate the certificates. Updating the macro should fix the runtime error.

But you may encounter another issue as you are using tirtos_tivac_2_14_00_10. With recent changes to wolfSSL, the stack requirement has increased. The default stack size in tcpEchoTLS example (in tirtos_tivac_2_14_00_10 version) is insufficient. This has been fixed in the latest version "tirtos_tivac_2_14_04_31". I would recommend using the latest version. Or you can manually update "TCPWORKERSTACKSIZE" in tcpEchoTLS.c.

Hope this helps.

Vikram

0 Dionisio Ramirez Prieto over 9 years ago in reply to Vikram Adiga

Intellectual 780 points

Hi Vikram

I've done the changes you suggested and, indeed, the code now works properly.

Nevertheless, I had to change:

/* USER STEP: update to current time (in secs) since epoch (i.e. Jan 1, 1970) */
#define CURRENTTIME 1410303972

to a new value:

#define CURRENTTIME 1459120000

But actually I don't figure out how this value must be chosen.

Could you explain this issue a little?

Thank you so much

Dionisio

0 Vikram Adiga over 9 years ago in reply to Dionisio Ramirez Prieto

TI__Genius 10825 points

Hi Dionisio,

The CURRENTTIME macro defines current time in seconds since epoch. Websites like epochconverter: http://www.epochconverter.com/ provide the current time in secs since epoch. You can get the time and use it in your application.

This macro is used to setup the system clock in the TI-RTOS. The SSL library uses the system clock to validate the certificates (i.e. CA certificates, Server certificates).

Hope this helps,

Vikram

0 Dionisio Ramirez Prieto over 9 years ago in reply to Vikram Adiga

Intellectual 780 points

Ok, I got it, thanks so much.

Dionisio

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Error in the example with Tiva C and wolfssl lib