asterisk users - Aug 2023 - Quick patch for updated NL-ips

Thanks to those on IRC confirming quickly that this was not something supported
(yet) in Asterisk.

Below is a quick fix/patch to tcptls.c for Asterisk 18 against this particular
provider.

Dw


static int check_tcptls_cert_name(ASN1_STRING *cert_str, const char *hostname,
const char *desc)
{
        unsigned char *str;
        int ret;

        ret = ASN1_STRING_to_UTF8(&str, cert_str);
        if (ret < 0 || !str) {
                return -1;
        }

        if (strlen((char *) str) != ret) {
                ast_log(LOG_WARNING, "Invalid certificate %s length
(contains NULL bytes?)\n", desc);

                ret = -1;
        } else if (!strcasecmp(hostname, (char *) str)) {
                ret = 0;
        } else if (strlen(str) > 2 && str[0] == '*'
&& str[1] == '.' && strlen(str) - 2 <=
strlen(hostname) && strcasecmp(hostname+strlen(hostname)-strlen(str)+2,
str+2) == 0) {
                ast_log(LOG_WARNING,"Warning: allowing match on wildcard
(%s =~ %s)\n", hostname, str);
                ret = 0;
        } else {
                ret = -1;
        }

        ast_debug(3, "SSL %s compare s1='%s'
s2='%s'\n", desc, hostname, str);
        OPENSSL_free(str);

        return ret;
}



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