Hi gang,
Trying to figure out why Kamailio won't negotiate specific TLS1.2 ciphers, such as for example TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 i.e. *ECDHE-RSA-AES256-GCM-SHA384*
OpenSSL lists the cipher as supported, however Kamailio won't negotiate it:
# nmap --script ssl-enum-ciphers -p 5061 mysbc.domain.com PORT STATE SERVICE 5061/tcp open sip-tls | ssl-enum-ciphers: | TLSv1.2: | ciphers: | TLS_RSA_WITH_AES_256_GCM_SHA384 (rsa 2048) - A | TLS_RSA_WITH_AES_256_CBC_SHA256 (rsa 2048) - A | TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A | TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (rsa 2048) - A | TLS_RSA_WITH_AES_128_GCM_SHA256 (rsa 2048) - A | TLS_RSA_WITH_AES_128_CBC_SHA256 (rsa 2048) - A | TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A | TLS_RSA_WITH_SEED_CBC_SHA (rsa 2048) - A | TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (rsa 2048) - A | TLS_RSA_WITH_RC4_128_SHA (rsa 2048) - C | TLS_RSA_WITH_RC4_128_MD5 (rsa 2048) - C | TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 2048) - C | compressors: | NULL | cipher preference: server | warnings: | 64-bit block cipher 3DES vulnerable to SWEET32 attack | Broken cipher RC4 is deprecated by RFC 7465 | Ciphersuite uses MD5 for message integrity |_ least strength: C
OS:
- outdated Debian 8 Jessie - OpenSSL 1.0.1t 3 May 2016 - openssl ciphers -v | grep '*ECDHE-RSA-AES256-GCM-SHA384*' - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD
# kamailio -V version: kamailio 5.5.6 (x86_64/linux) ad1244 flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. compiled on 21:08:20 Apr 13 2023 with gcc 4.9.2
modparam("tls", "cipher_list", "ALL") method = TLSv1.2+
Elliptic Curve Diffie-Hellman (EDCH) https://kamailio.org/docs/modules/devel/modules/tls.html#tls.compile-Ciphers are only supported in OpenSSL 1.0.0e and later.
Any suggestions?
Thanks.
Hello,
Try to enable https://kamailio.org/docs/modules/devel/modules/tls.html#tls.p.renegotiation
On Fri, 14 Apr 2023 at 19:47 Sergiu Pojoga pojogas@gmail.com wrote:
Hello,
From the docs [1] "TLSv1.2+" seems to require openssl v1.1.1 at least. Can you try "TLSv1.1+" or "TLSv1.2" instead?
Lukas
[1] https://kamailio.org/docs/modules/devel/modules/tls.html#tls.p.tls_method
modparam("tls", "renegotiation", 1)
Tried to no positive result. Still getting "*SSL3_GET_CLIENT_HELLO:no shared cipher*" error and server doesn't list any ECDHE suite ciphers.
*> From the docs [1] "TLSv1.2+" seems to require openssl v1.1.1 at least.* I don't see it that way. Nmap test shows TLSv1.2 is supported, but missing the desired ECDHE cipher suite. Also, some less stringent clients in terms of ciphers do connect fine over TLS1.2
*> Can you try "TLSv1.1+" or "TLSv1.2" instead?* Tried - didn't make a diff.
I guess the question here boils down to the following: if local OpenSSL lists the ciphers as supported, why does a locally compiled Kamailio doesn't support them? Is there a way to compile Kamailio's TLS module differently to overcome this?
Thanks.
On Fri, Apr 14, 2023 at 2:34 PM Lukas Tribus lukas@ltri.eu wrote:
Hello,
if you are using the standard tls module (not e.g. tlsa etc..) there should not be a need to compile it differently.
Have you checked if maybe you have a conflicting setting in main kamailio configuration and dedicated tls.cfg file?
Probably also worth to check against which tls library the “tls.so” module is linked against, maybe you have multiple openssl libraries on that machine.
Cheers,
Henning
From: Sergiu Pojoga pojogas@gmail.com Sent: Freitag, 14. April 2023 21:56 To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: [SR-Users] Re: TLS1.2 ciphers
modparam("tls", "renegotiation", 1)
Tried to no positive result. Still getting "SSL3_GET_CLIENT_HELLO:no shared cipher" error and server doesn't list any ECDHE suite ciphers.
From the docs [1] "TLSv1.2+" seems to require openssl v1.1.1 at least.
I don't see it that way. Nmap test shows TLSv1.2 is supported, but missing the desired ECDHE cipher suite. Also, some less stringent clients in terms of ciphers do connect fine over TLS1.2
Can you try "TLSv1.1+" or "TLSv1.2" instead?
Tried - didn't make a diff.
I guess the question here boils down to the following: if local OpenSSL lists the ciphers as supported, why does a locally compiled Kamailio doesn't support them? Is there a way to compile Kamailio's TLS module differently to overcome this?
Thanks.
On Fri, Apr 14, 2023 at 2:34 PM Lukas Tribus <lukas@ltri.eumailto:lukas@ltri.eu> wrote: Hello,
From the docs [1] "TLSv1.2+" seems to require openssl v1.1.1 at least. Can you try "TLSv1.1+" or "TLSv1.2" instead?
Lukas
[1] https://kamailio.org/docs/modules/devel/modules/tls.html#tls.p.tls_method __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave@lists.kamailio.orgmailto:sr-users-leave@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
Hello,
some ciphers are only available if EC-certificates are used. I do not remember which ones. In theory it is possible to install on the same host:port (and the same iP address) both RSA and EC certificate. The correct one is choosen based on client capabilities/preferences. Nginx, Cyrus Imap, Sendmail support this.
Дилян
На 2023-04-20 08:56, Henning Westerholt написа:
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Henning Westerholt -
Lukas Tribus -
Nick F -
Sergiu Pojoga -
Дилян Пала узов