[OATH-Toolkit-help] Help with OATHLIB

[derek cooper]

Hello,

I am trying to generate TOTP tokens using OATHLIB, with the following test program:

#include <stdio.h>

#include <string.h>

#include <time.h>

#include <liboath/oath.h>

int main(int argc, char *argv[]){

int rc=1;

const char* secret="12345678901234567890123456789011";

size_t secretlen=32;

size_t window=0;

unsigned digits=6;

char mytoken[10];

time_t now;

        rc=oath_init();

if (rc == 0)

   printf("liboath: %i\n",OATH_OK);

        now=time(NULL);

        rc=oath_totp_generate(secret,

                              secretlen,

                              now,

     OATH_TOTP_DEFAULT_TIME_STEP_SIZE,

                              OATH_TOTP_DEFAULT_START_TIME,

                              digits,

                              mytoken);

if (rc == 0)

   printf("Time: %i Token: %s\n",now,&mytoken);

rc=oath_done();

return 0;

}

I compile the program with:

cc oath.c -o test1 -loath

However the token generated does not match with the same token using oathtool, when i use a real token (values above are dummy ones) oathtool returns the correct value, but the test c program does not. the results:

oathtool -v --totp 12345678901234567890123456789011 ;./test1 

Hex secret: 12345678901234567890123456789011

Base32 secret: CI2FM6EQCI2FM6EQCI2FM6EQCE======

Digits: 6

Window size: 0

Step size (seconds): 30

Start time: 1970-01-01 00:00:00 UTC (0)

Current time: 2016-03-29 08:19:44 UTC (1459239584)

Counter: 0x2E63527 (48641319)

012625

liboath: 0

Time: 1459239584 Token: 815393

As you can see oathtool time (seconds) 1459239584 matches ok, but the tokens are different? 012625 verses 815393

Any pointers or help would be most welcome.

Thanks

Derek