LAUNCHCC3235MOD: Getting tcpechotls to work with python script from Windows

Malcolm Windham

Part Number: LAUNCHCC3235MOD
Other Parts Discussed in Thread: UNIFLASH,

I have modiefied the port and the wifi mode to be a client on local network in tcpechotls. I can ping before and after debug, but I always get refused connection. I am unsure this is intended for certs

define ROOT_CA_CERT_FILE     "caCert.pem"  //"DummyCA"
#define PRIVATE_KEY_FILE      "caKey.pem"   //"DummyKey"
#define TRUSTED_CERT_FILE     "serverCert.pem"  //"DummyTrustedCert"

and it fails on uart as "tcpHandler: failed to load objects"

//...
 status = SlNetIf_loadSecObj(SLNETIF_SEC_OBJ_TYPE_CERTIFICATE,
            ROOT_CA_CERT_FILE, strlen(ROOT_CA_CERT_FILE), srvCAPem,
            srvCAPemLen, SLNETIF_ID_1);
    status |= SlNetIf_loadSecObj(SLNETIF_SEC_OBJ_TYPE_CERTIFICATE,
            TRUSTED_CERT_FILE, strlen(TRUSTED_CERT_FILE), srvCertPem,
            srvCertPemLen, SLNETIF_ID_1);
    status |= SlNetIf_loadSecObj(SLNETIF_SEC_OBJ_TYPE_RSA_PRIVATE_KEY,
            PRIVATE_KEY_FILE, strlen(PRIVATE_KEY_FILE)-1, srvKeyPem,
            srvKeyPemLen, SLNETIF_ID_1);
    if(status < 0) {
        Display_printf(display, 0, 0, "tcpHandler: failed to load objects\n");
        goto shutdown;
    }

11 months ago

0 Malcolm Windham 11 months ago

Expert 1580 points

It seems to fail at

status |= SlNetIf_loadSecObj(SLNETIF_SEC_OBJ_TYPE_RSA_PRIVATE_KEY,
            PRIVATE_KEY_FILE, strlen(PRIVATE_KEY_FILE)-1, srvKeyPem,
            srvKeyPemLen, SLNETIF_ID_1);

0 Shlomi Itzhak 11 months ago in reply to Malcolm Windham

TI__Guru 57780 points

Hi,

It does not find the certificate key on the file system. Did you program it using Uniflash?

Shlomi

0 Malcolm Windham 11 months ago in reply to Shlomi Itzhak

Expert 1580 points

The two preceding returned 0 so I did not think about that. What files should be in the program as I was guessing for the "Dummy" stuff. Also, how do I see what files are on the LAUNCHCC3235MOD? It seems like a previous version of Uniflash would show such.

0 Shlomi Itzhak 11 months ago in reply to Malcolm Windham

TI__Guru 57780 points

you can see the files only in development mode.

In this example, it should flash from the application itself with the names provided. I don't see a reason it would fail. are srvCAPem, srvCertPem and srvKeyPem exist in your project? Can you tell what is the error?

0 Malcolm Windham 11 months ago in reply to Shlomi Itzhak

Expert 1580 points

Using the original code I get status=-2006, and the same with fiddling with #defines. Failure at last load .

/* Secure object names */
#define ROOT_CA_CERT_FILE     "DummyCA"
#define PRIVATE_KEY_FILE      "DummyKey"
#define TRUSTED_CERT_FILE     "DummyTrustedCert"
//...
status |= SlNetIf_loadSecObj(SLNETIF_SEC_OBJ_TYPE_RSA_PRIVATE_KEY,
            PRIVATE_KEY_FILE, strlen(PRIVATE_KEY_FILE)-1, srvKeyPem,
            srvKeyPemLen, SLNETIF_ID_1);

+1 Shlomi Itzhak 11 months ago in reply to Malcolm Windham

TI__Guru 57780 points

I think this is because of the strlen(PRIVATE_KEY_FILE)-1. I am not sure where the -1 is coming from.

All the rest are without the -1.

inside the function, it would test for the length and if there is a mismatch, you would get this error.

0 Malcolm Windham 11 months ago in reply to Shlomi Itzhak

Expert 1580 points

Wow! It is in SDK that way. Python script from tools works.

0 Shlomi Itzhak 11 months ago in reply to Malcolm Windham

TI__Guru 57780 points

thanks for validating, strange it didn't come up yet.

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LAUNCHCC3235MOD: Getting tcpechotls to work with python script from Windows