boost::asio::ssl::context is created using specifically TLSv1.2, which
blocks the ability to use superior version of TLS like TLSv1.3.
Filtering is also made specially later in the code to remove unsafe
version for TLS such SSLv2, SSLv3 etc..
This change is removing double filtering to allow TLSv1.2 and above to
be used.
testssl.sh 3.0rc5 now reports the following (please note monerod was
built with USE_EXTRA_EC_CERT):
$ ./testssl.sh --openssl=/usr/bin/openssl \
--each-cipher --cipher-per-proto \
--server-defaults --server-preference \
--vulnerable --heartbleed --ccs --ticketbleed \
--robot --renegotiation --compression --breach \
--poodle --tls-fallback --sweet32 --beast --lucky13 \
--freak --logjam --drown --pfs --rc4 --full \
--wide --hints 127.0.0.1:38081
Using "OpenSSL 1.1.1d 10 Sep 2019" [~80 ciphers]
on ip-10-97-15-6:/usr/bin/openssl
(built: "Dec 3 21:14:51 2019", platform: "linux-x86_64")
Start 2019-12-03 21:51:25 -->> 127.0.0.1:38081 (127.0.0.1) <<--
rDNS (127.0.0.1): --
Service detected: HTTP
Testing protocols via sockets except NPN+ALPN
SSLv2 not offered (OK)
SSLv3 not offered (OK)
TLS 1 not offered
TLS 1.1 not offered
TLS 1.2 offered (OK)
TLS 1.3 offered (OK): final
NPN/SPDY not offered
ALPN/HTTP2 not offered
Testing for server implementation bugs
No bugs found.
Testing cipher categories
NULL ciphers (no encryption) not offered (OK)
Anonymous NULL Ciphers (no authentication) not offered (OK)
Export ciphers (w/o ADH+NULL) not offered (OK)
LOW: 64 Bit + DES, RC[2,4] (w/o export) not offered (OK)
Triple DES Ciphers / IDEA not offered (OK)
Average: SEED + 128+256 Bit CBC ciphers not offered
Strong encryption (AEAD ciphers) offered (OK)
Testing robust (perfect) forward secrecy, (P)FS -- omitting Null Authentication/Encryption, 3DES, RC4
PFS is offered (OK), ciphers follow (client/browser support is important here)
Hexcode Cipher Suite Name (OpenSSL) KeyExch. Encryption Bits Cipher Suite Name (IANA/RFC)
-----------------------------------------------------------------------------------------------------------------------------
x1302 TLS_AES_256_GCM_SHA384 ECDH 253 AESGCM 256 TLS_AES_256_GCM_SHA384
x1303 TLS_CHACHA20_POLY1305_SHA256 ECDH 253 ChaCha20 256 TLS_CHACHA20_POLY1305_SHA256
xc030 ECDHE-RSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
xc02c ECDHE-ECDSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
xcca9 ECDHE-ECDSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
xcca8 ECDHE-RSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
x1301 TLS_AES_128_GCM_SHA256 ECDH 253 AESGCM 128 TLS_AES_128_GCM_SHA256
xc02f ECDHE-RSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
xc02b ECDHE-ECDSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
Elliptic curves offered: prime256v1 secp384r1 secp521r1 X25519 X448
Testing server preferences
Has server cipher order? yes (OK)
Negotiated protocol TLSv1.3
Negotiated cipher TLS_AES_256_GCM_SHA384, 253 bit ECDH (X25519)
Cipher order
TLSv1.2: ECDHE-ECDSA-CHACHA20-POLY1305 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-RSA-CHACHA20-POLY1305 ECDHE-RSA-AES256-GCM-SHA384 ECDHE-RSA-AES128-GCM-SHA256
TLSv1.3: TLS_AES_256_GCM_SHA384 TLS_CHACHA20_POLY1305_SHA256 TLS_AES_128_GCM_SHA256
Testing server defaults (Server Hello)
TLS extensions (standard) "renegotiation info/#65281" "EC point formats/#11" "supported versions/#43" "key share/#51" "max fragment length/#1" "extended master secret/#23"
Session Ticket RFC 5077 hint no -- no lifetime advertised
SSL Session ID support yes
Session Resumption Tickets no, ID: no
TLS clock skew Random values, no fingerprinting possible
Server Certificate #1 (in response to request w/o SNI)
Signature Algorithm SHA256 with RSA
Server key size RSA 4096 bits
Server key usage --
Server extended key usage --
Serial / Fingerprints 01 / SHA1 132E42981812F5575FA0AE64922B18A81B38C03F
SHA256 EBA3CC4AA09DEF26706E64A70DB4BC8D723533BB67EAE12B503A845019FB61DC
Common Name (CN) (no CN field in subject)
subjectAltName (SAN) missing (NOT ok) -- Browsers are complaining
Issuer
Trust (hostname) certificate does not match supplied URI
Chain of trust NOT ok (self signed)
EV cert (experimental) no
"eTLS" (visibility info) not present
Certificate Validity (UTC) 181 >= 60 days (2019-12-03 21:51 --> 2020-06-02 21:51)
# of certificates provided 1
Certificate Revocation List --
OCSP URI --
NOT ok -- neither CRL nor OCSP URI provided
OCSP stapling not offered
OCSP must staple extension --
DNS CAA RR (experimental) not offered
Certificate Transparency --
Server Certificate #2 (in response to request w/o SNI)
Signature Algorithm ECDSA with SHA256
Server key size EC 256 bits
Server key usage --
Server extended key usage --
Serial / Fingerprints 01 / SHA1 E17B765DD8124525B1407E827B89A31FB167647D
SHA256 AFB7F44B1C33831F521357E5AEEB813044CB02532143E92D35650A3FF792A7C3
Common Name (CN) (no CN field in subject)
subjectAltName (SAN) missing (NOT ok) -- Browsers are complaining
Issuer
Trust (hostname) certificate does not match supplied URI
Chain of trust NOT ok (self signed)
EV cert (experimental) no
"eTLS" (visibility info) not present
Certificate Validity (UTC) 181 >= 60 days (2019-12-03 21:51 --> 2020-06-02 21:51)
# of certificates provided 1
Certificate Revocation List --
OCSP URI --
NOT ok -- neither CRL nor OCSP URI provided
OCSP stapling not offered
OCSP must staple extension --
DNS CAA RR (experimental) not offered
Certificate Transparency --
Testing HTTP header response @ "/"
HTTP Status Code 404 Not found (Hint: supply a path which doesn't give a "404 Not found")
HTTP clock skew Got no HTTP time, maybe try different URL?
Strict Transport Security not offered
Public Key Pinning --
Server banner Epee-based
Application banner --
Cookie(s) (none issued at "/") -- maybe better try target URL of 30x
Security headers --
Reverse Proxy banner --
Testing vulnerabilities
Heartbleed (CVE-2014-0160) not vulnerable (OK), no heartbeat extension
CCS (CVE-2014-0224) not vulnerable (OK)
Ticketbleed (CVE-2016-9244), experiment. not vulnerable (OK), no session ticket extension
ROBOT Server does not support any cipher suites that use RSA key transport
Secure Renegotiation (CVE-2009-3555) not vulnerable (OK)
Secure Client-Initiated Renegotiation not vulnerable (OK)
CRIME, TLS (CVE-2012-4929) not vulnerable (OK)
BREACH (CVE-2013-3587) no HTTP compression (OK) - only supplied "/" tested
POODLE, SSL (CVE-2014-3566) not vulnerable (OK)
TLS_FALLBACK_SCSV (RFC 7507) No fallback possible, no protocol below TLS 1.2 offered (OK)
SWEET32 (CVE-2016-2183, CVE-2016-6329) not vulnerable (OK)
FREAK (CVE-2015-0204) not vulnerable (OK)
DROWN (CVE-2016-0800, CVE-2016-0703) not vulnerable on this host and port (OK)
make sure you don't use this certificate elsewhere with SSLv2 enabled services
https://censys.io/ipv4?q=EBA3CC4AA09DEF26706E64A70DB4BC8D723533BB67EAE12B503A845019FB61DC could help you to find out
LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2
BEAST (CVE-2011-3389) no SSL3 or TLS1 (OK)
LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK)
RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK)
Testing ciphers per protocol via OpenSSL plus sockets against the server, ordered by encryption strength
Hexcode Cipher Suite Name (OpenSSL) KeyExch. Encryption Bits Cipher Suite Name (IANA/RFC)
-----------------------------------------------------------------------------------------------------------------------------
SSLv2
SSLv3
TLS 1
TLS 1.1
TLS 1.2
xc030 ECDHE-RSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
xc02c ECDHE-ECDSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
xcca9 ECDHE-ECDSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
xcca8 ECDHE-RSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
xc02f ECDHE-RSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
xc02b ECDHE-ECDSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS 1.3
x1302 TLS_AES_256_GCM_SHA384 ECDH 253 AESGCM 256 TLS_AES_256_GCM_SHA384
x1303 TLS_CHACHA20_POLY1305_SHA256 ECDH 253 ChaCha20 256 TLS_CHACHA20_POLY1305_SHA256
x1301 TLS_AES_128_GCM_SHA256 ECDH 253 AESGCM 128 TLS_AES_128_GCM_SHA256
Running client simulations (HTTP) via sockets
Browser Protocol Cipher Suite Name (OpenSSL) Forward Secrecy
------------------------------------------------------------------------------------------------
Android 4.2.2 No connection
Android 4.4.2 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Android 5.0.0 TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256 256 bit ECDH (P-256)
Android 6.0 TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256 256 bit ECDH (P-256)
Android 7.0 TLSv1.2 ECDHE-RSA-CHACHA20-POLY1305 253 bit ECDH (X25519)
Android 8.1 (native) No connection
Android 9.0 (native) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Chrome 65 Win 7 TLSv1.2 ECDHE-RSA-CHACHA20-POLY1305 253 bit ECDH (X25519)
Chrome 74 (Win 10) No connection
Firefox 62 Win 7 TLSv1.2 ECDHE-RSA-CHACHA20-POLY1305 253 bit ECDH (X25519)
Firefox 66 (Win 8.1/10) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
IE 6 XP No connection
IE 7 Vista No connection
IE 8 Win 7 No connection
IE 8 XP No connection
IE 11 Win 7 No connection
IE 11 Win 8.1 No connection
IE 11 Win Phone 8.1 No connection
IE 11 Win 10 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Edge 15 Win 10 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 253 bit ECDH (X25519)
Edge 17 (Win 10) TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 253 bit ECDH (X25519)
Opera 60 (Win 10) No connection
Safari 9 iOS 9 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Safari 9 OS X 10.11 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Safari 10 OS X 10.12 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Apple ATS 9 iOS 9 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Tor 17.0.9 Win 7 No connection
Java 6u45 No connection
Java 7u25 No connection
Java 8u161 TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Java 9.0.4 TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
OpenSSL 1.0.1l TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
OpenSSL 1.0.2e TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
OpenSSL 1.1.0j (Debian) TLSv1.2 ECDHE-RSA-CHACHA20-POLY1305 253 bit ECDH (X25519)
OpenSSL 1.1.1b (Debian) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Thunderbird (60.6) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
add two RSA based ciphers for Windows/depends compatibility
also enforce server cipher ordering
also set ECDH to auto because vtnerd says it is good :)
When built with the depends system, openssl does not include any
cipher on the current whitelist, so add this one, which fixes the
problem, and does seem sensible.
An override for the wallet to daemon connection is provided, but not for
other SSL contexts. The intent is to prevent users from supplying a
system CA as the "user" whitelisted certificate, which is less secure
since the key is controlled by a third party.
This allows "chain" certificates to be used with the fingerprint
whitelist option. A user can get a system-ca signature as backup while
clients explicitly whitelist the server certificate. The user specified
CA can also be combined with fingerprint whitelisting.
The former has the same behavior with single self signed certificates
while allowing the server to have separate short-term authentication
keys with long-term authorization keys.
If the verification mode is `system_ca`, clients will now do hostname
verification. Thus, only certificates from expected hostnames are
allowed when SSL is enabled. This can be overridden by forcible setting
the SSL mode to autodetect.
Clients will also send the hostname even when `system_ca` is not being
performed. This leaks possible metadata, but allows servers providing
multiple hostnames to respond with the correct certificate. One example
is cloudflare, which getmonero.org is currently using.
If SSL is "enabled" via command line without specifying a fingerprint or
certificate, the system CA list is checked for server verification and
_now_ fails the handshake if that check fails. This change was made to
remain consistent with standard SSL/TLS client behavior. This can still
be overridden by using the allow any certificate flag.
If the SSL behavior is autodetect, the system CA list is still checked
but a warning is logged if this fails. The stream is not rejected
because a re-connect will be attempted - its better to have an
unverified encrypted stream than an unverified + unencrypted stream.
Using `verify_peer` on server side requests a certificate from the
client. If no certificate is provided, the server silently accepts the
connection and rejects if the client sends an unexpected certificate.
Adding `verify_fail_if_no_cert` has no affect on client and for server
requires that the peer sends a certificate or fails the handshake. This
is the desired behavior when the user specifies a fingerprint or CA file.
Currently a client must provide a certificate, even if the server is
configured to allow all certificates. This drops that requirement from
the client - unless the server is configured to use a CA file or
fingerprint(s) for verification - which is the standard behavior for SSL
servers.
The "system-wide" CA is not being used as a "fallback" to verify clients
before or after this patch.
Specifying SSL certificates for peer verification does an exact match,
making it a not-so-obvious alias for the fingerprints option. This
changes the checks to OpenSSL which loads concatenated certificate(s)
from a single file and does a certificate-authority (chain of trust)
check instead. There is no drop in security - a compromised exact match
fingerprint has the same worse case failure. There is increased security
in allowing separate long-term CA key and short-term SSL server keys.
This also removes loading of the system-default CA files if a custom
CA file or certificate fingerprint is specified.
RPC connections now have optional tranparent SSL.
An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.
SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.
Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.
To generate long term certificates:
openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT
/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.
SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.
RPC connections now have optional tranparent SSL.
An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.
SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.
Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.
To generate long term certificates:
openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT
/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.
SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.
Bertrand Jacquin
xiphon
moneromooo-monero
Lee Clagett
Martijn Otto
Dusan Klinec
Howard Chu