parse_oid()

Converts the name of the security mechanism provided on the command line (if any is provided) to an OID for GSS-API to work with.

Despite this sample, applications are strongly recommended to use the default mechanism provided by the GSS-API implementation, rather than specifying one. The default mechanism can be obtained by setting the mechanism OID value to GSS_C_NULL_OID. Also, the function gss_str_to_oid() is not supported by all GSS-API implementations.

Example A–3 parse_oid()

static void parse_oid(char *mechanism, gss_OID *oid)
{
    char        *mechstr = 0, *cp;
    gss_buffer_desc tok;
    OM_uint32 maj_stat, min_stat;
   
    if (isdigit(mechanism[0])) {
        mechstr = malloc(strlen(mechanism)+5);
        if (!mechstr) {
            printf("Couldn't allocate mechanism scratch!\n");
            return;
        }
        sprintf(mechstr, "{ %s }", mechanism);
        for (cp = mechstr; *cp; cp++)
            if (*cp == '.')
                *cp = ' ';
        tok.value = mechstr;
    } else
        tok.value = mechanism;
    tok.length = strlen(tok.value);
    maj_stat = gss_str_to_oid(&min_stat, &tok, oid);
    if (maj_stat != GSS_S_COMPLETE) {
        display_status("str_to_oid", maj_stat, min_stat);
        return;
    }
    if (mechstr)
        free(mechstr);
}