これは、なにをしたくて書いたもの？
以前、OpenSSLとnmapを使って、サーバーが対応しているSSL／TLSプロトコルや暗号化アルゴリズムを確認する方法を調べてみました。
サーバーが対応しているSSL／TLSプロトコルを確認する（openssl s_client、nmap） - CLOVER🍀
他に、この用途ではtestssl.shというツールが便利そうなのでちょっと試してみることにしました。
testssl.sh
testssl.shは、サーバーのサポートしているSSL／TLS暗号化、プロトコル、最近の暗号化の血管などについてチェックしてくれるツールです。
testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
/bin/bash based SSL/TLS tester: testssl.sh
主な機能は、「Key features」に書かれています。
- 出力が明確で、良し悪しを容易に見分けられる
- LinuxやmacOS、FreeBSD等のbashが動作する環境ですぐに使用でき、追加モジュールのインストールは不要
- Dockerイメージも提供されている
- Webサーバーだけではなく、STARTTLSサービスに対してもテストができる
- いくつかのコマンドラインオプションは、利用者のテストの実行や構成の出力に役立つ
- クライアント側の機能が不足していて特定のチェックができない場合は、警告が出力される
manページもあります。
GitHub - drwetter/testssl.sh: Testing TLS/SSL encryption anywhere on any port
簡単に試してみましょう。
環境
今回の環境は、こちら。Ubuntu Linux 20.04 LTSです。
$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04.4 LTS Release: 20.04 Codename: focal $ uname -srvmpio Linux 5.4.0-117-generic #132-Ubuntu SMP Thu Jun 2 00:39:06 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
お題
IPアドレス192.168.33.11のサーバーに、SSL／TLSを有効にしたApacheを用意します。
ここに、別のサーバーからtestssl.shを使ってアクセスして、構築したApacheが対応しているSSL／TLSのバージョンを確認してみます。
Apacheの用意
まずは、Apacheをインストールします。
$ sudo apt install apache2 $ apache2 -v Server version: Apache/2.4.41 (Ubuntu) Server built: 2022-04-26T18:02:11
mod_sslを有効にして、SSL／TLS用のVirtualHostも有効にします。
$ sudo a2enmod ssl $ sudo a2ensite default-ssl $ sudo systemctl restart apache2
確認。
$ curl -I -k https://192.168.33.11 HTTP/1.1 200 OK Date: Mon, 13 Jun 2022 15:09:16 GMT Server: Apache/2.4.41 (Ubuntu) Last-Modified: Mon, 13 Jun 2022 15:07:29 GMT ETag: "2aa6-5e155a592c396" Accept-Ranges: bytes Content-Length: 10918 Vary: Accept-Encoding Content-Type: text/html
$ grep -v '.*#' /etc/apache2/mods-enabled/ssl.conf
<IfModule mod_ssl.c>
SSLRandomSeed startup builtin
SSLRandomSeed startup file:/dev/urandom 512
SSLRandomSeed connect builtin
SSLRandomSeed connect file:/dev/urandom 512
AddType application/x-x509-ca-cert .crt
AddType application/x-pkcs7-crl .crl
SSLPassPhraseDialog exec:/usr/share/apache2/ask-for-passphrase
SSLSessionCache shmcb:${APACHE_RUN_DIR}/ssl_scache(512000)
SSLSessionCacheTimeout 300
SSLCipherSuite HIGH:!aNULL
SSLProtocol all -SSLv3
</IfModule>
testssl.shをインストールする
testssl.shのインストール方法は、いくつかあるようです。
今回は、GitHubのReleasesからダウンロードする方法を取りたいと思います。
$ curl -OL https://github.com/drwetter/testssl.sh/archive/refs/tags/v3.0.7.tar.gz
ダウンロード後、展開してディレクトリ内へ移動。
$ tar xf v3.0.7.tar.gz $ cd testssl.sh-3.0.7
バージョン。
$ ./testssl.sh --version
###########################################################
testssl.sh 3.0.7 from https://testssl.sh/
This program is free software. Distribution and
modification under GPLv2 permitted.
USAGE w/o ANY WARRANTY. USE IT AT YOUR OWN RISK!
Please file bugs @ https://testssl.sh/bugs/
###########################################################
Using "OpenSSL 1.0.2-chacha (1.0.2k-dev)" [~183 ciphers]
on ubuntu2004:./bin/openssl.Linux.x86_64
(built: "Jan 18 17:12:17 2019", platform: "linux-x86_64")
ヘルプ。
$ ./testssl.sh --help
"testssl.sh [options] <URI>" or "testssl.sh <options>"
"testssl.sh <options>", where <options> is:
--help what you're looking at
-b, --banner displays banner + version of testssl.sh
-v, --version same as previous
-V, --local pretty print all local ciphers
-V, --local <pattern> which local ciphers with <pattern> are available? If pattern is not a number: word match
<pattern> is always an ignore case word pattern of cipher hexcode or any other string in the name, kx or bits
"testssl.sh <URI>", where <URI> is:
<URI> host|host:port|URL|URL:port port 443 is default, URL can only contain HTTPS protocol)
"testssl.sh [options] <URI>", where [options] is:
-t, --starttls <protocol> Does a default run against a STARTTLS enabled <protocol,
protocol is <ftp|smtp|lmtp|pop3|imap|xmpp|telnet|ldap|nntp|postgres|mysql>
--xmpphost <to_domain> For STARTTLS enabled XMPP it supplies the XML stream to-'' domain -- sometimes needed
--mx <domain/host> Tests MX records from high to low priority (STARTTLS, port 25)
〜省略〜
file output options (can also be preset via environment variables)
--log, --logging logs stdout to '${NODE}-p${port}${YYYYMMDD-HHMM}.log' in current working directory (cwd)
--logfile|-oL <logfile> logs stdout to 'dir/${NODE}-p${port}${YYYYMMDD-HHMM}.log'. If 'logfile' is a dir or to a specified 'logfile'
--json additional output of findings to flat JSON file '${NODE}-p${port}${YYYYMMDD-HHMM}.json' in cwd
--jsonfile|-oj <jsonfile> additional output to the specified flat JSON file or directory, similar to --logfile
--json-pretty additional JSON structured output of findings to a file '${NODE}-p${port}${YYYYMMDD-HHMM}.json' in cwd
--jsonfile-pretty|-oJ <jsonfile> additional JSON structured output to the specified file or directory, similar to --logfile
--csv additional output of findings to CSV file '${NODE}-p${port}${YYYYMMDD-HHMM}.csv' in cwd or directory
--csvfile|-oC <csvfile> additional output as CSV to the specified file or directory, similar to --logfile
--html additional output as HTML to file '${NODE}-p${port}${YYYYMMDD-HHMM}.html'
--htmlfile|-oH <htmlfile> additional output as HTML to the specified file or directory, similar to --logfile
--out(f,F)ile|-oa/-oA <fname> log to a LOG,JSON,CSV,HTML file (see nmap). -oA/-oa: pretty/flat JSON.
"auto" uses '${NODE}-p${port}${YYYYMMDD-HHMM}'. If fname if a dir uses 'dir/${NODE}-p${port}${YYYYMMDD-HHMM}'
--hints additional hints to findings
--severity <severity> severities with lower level will be filtered for CSV+JSON, possible values <LOW|MEDIUM|HIGH|CRITICAL>
--append if (non-empty) <logfile>, <csvfile>, <jsonfile> or <htmlfile> exists, append to file. Omits any header
--outprefix <fname_prefix> before '${NODE}.' above prepend <fname_prefix>
Options requiring a value can also be called with '=' e.g. testssl.sh -t=smtp --wide --openssl=/usr/bin/openssl <URI>.
<URI> always needs to be the last parameter.
使ってみる
では、testssl.shを使ってみましょう。
ドキュメントやmanによると、以下のコマンドで実行するようです。
$ testssl.sh [OPTIONS] <URI>, testssl.sh [OPTIONS] --file <FILE>
URIの書式は以下になります。URLを指定できるのは、HTTPSに限るようです。
"testssl.sh <URI>", where <URI> is:
<URI> host|host:port|URL|URL:port port 443 is default, URL can only contain HTTPS protocol)
つまり、今回の環境はHTTPSを有効にしたApacheなので、以下のどちらかで確認できることになります。
$ ./testssl.sh https://192.168.33.11 $ ./testssl.sh 192.168.33.11:443
実行してみます。
$ ./testssl.sh 192.168.33.11:443
###########################################################
testssl.sh 3.0.7 from https://testssl.sh/
This program is free software. Distribution and
modification under GPLv2 permitted.
USAGE w/o ANY WARRANTY. USE IT AT YOUR OWN RISK!
Please file bugs @ https://testssl.sh/bugs/
###########################################################
Using "OpenSSL 1.0.2-chacha (1.0.2k-dev)" [~183 ciphers]
on ubuntu2004:./bin/openssl.Linux.x86_64
(built: "Jan 18 17:12:17 2019", platform: "linux-x86_64")
Start 2022-06-14 01:42:14 -->> 192.168.33.11:443 (192.168.33.11) <<--
rDNS (192.168.33.11): --
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 http/1.1 (offered)
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
Obsolete CBC ciphers (AES, ARIA etc.) offered
Strong encryption (AEAD ciphers) offered (OK)
Testing robust (perfect) forward secrecy, (P)FS -- omitting Null Authentication/Encryption, 3DES, RC4
PFS is offered (OK) TLS_AES_256_GCM_SHA384 TLS_CHACHA20_POLY1305_SHA256 ECDHE-RSA-AES256-GCM-SHA384 ECDHE-RSA-AES256-SHA384
ECDHE-RSA-AES256-SHA DHE-RSA-AES256-GCM-SHA384 ECDHE-RSA-CHACHA20-POLY1305 DHE-RSA-CHACHA20-POLY1305
DHE-RSA-AES256-CCM8 DHE-RSA-AES256-CCM DHE-RSA-AES256-SHA256 DHE-RSA-AES256-SHA ECDHE-RSA-CAMELLIA256-SHA384
DHE-RSA-CAMELLIA256-SHA256 DHE-RSA-CAMELLIA256-SHA DHE-RSA-ARIA256-GCM-SHA384 ECDHE-ARIA256-GCM-SHA384
TLS_AES_128_GCM_SHA256 ECDHE-RSA-AES128-GCM-SHA256 ECDHE-RSA-AES128-SHA256 ECDHE-RSA-AES128-SHA
DHE-RSA-AES128-GCM-SHA256 DHE-RSA-AES128-CCM8 DHE-RSA-AES128-CCM DHE-RSA-AES128-SHA256 DHE-RSA-AES128-SHA
ECDHE-RSA-CAMELLIA128-SHA256 DHE-RSA-CAMELLIA128-SHA256 DHE-RSA-CAMELLIA128-SHA DHE-RSA-ARIA128-GCM-SHA256
ECDHE-ARIA128-GCM-SHA256
Elliptic curves offered: prime256v1 secp384r1 secp521r1 X25519 X448
DH group offered: RFC3526/Oakley Group 14 (2048 bits)
Testing server preferences
Has server cipher order? no (NOT ok)
Negotiated protocol TLSv1.3
Negotiated cipher TLS_AES_256_GCM_SHA384, 253 bit ECDH (X25519) (limited sense as client will pick)
Negotiated cipher per proto (limited sense as client will pick)
ECDHE-RSA-AES256-GCM-SHA384: TLSv1.2
TLS_AES_128_GCM_SHA256: TLSv1.3
No further cipher order check has been done as order is determined by the client
Testing server defaults (Server Hello)
TLS extensions (standard) "renegotiation info/#65281" "EC point formats/#11" "session ticket/#35" "supported versions/#43" "key share/#51"
"supported_groups/#10" "max fragment length/#1" "application layer protocol negotiation/#16" "encrypt-then-mac/#22"
"extended master secret/#23"
Session Ticket RFC 5077 hint 300 seconds, session tickets keys seems to be rotated < daily
SSL Session ID support yes
Session Resumption Tickets: yes, ID: yes
TLS clock skew Random values, no fingerprinting possible
Signature Algorithm SHA256 with RSA
Server key size RSA 2048 bits
Server key usage --
Server extended key usage --
Serial 529926083E8825C4B598C836C21C368E8A7A3C58 (OK: length 20)
Fingerprints SHA1 AFE6367C62663F465F166F9EAE2B75F63AA568D9
SHA256 43BEE2A6A9C92EFB380A5E3A0999860431A2B886970C15F0F18248FC594EB96B
Common Name (CN) web-server
subjectAltName (SAN) web-server
Issuer web-server
Trust (hostname) certificate does not match supplied URI
Chain of trust NOT ok (self signed)
EV cert (experimental) no
ETS/"eTLS", visibility info not present
Certificate Validity (UTC) 3649 >= 60 days (2022-06-13 16:40 --> 2032-06-10 16:40)
>= 10 years is way too long
# 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 200 OK
HTTP clock skew 0 sec from localtime
Strict Transport Security not offered
Public Key Pinning --
Server banner Apache/2.4.41 (Ubuntu)
Application banner --
Cookie(s) (none issued at "/")
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)
ROBOT not vulnerable (OK)
Secure Renegotiation (RFC 5746) supported (OK)
Secure Client-Initiated Renegotiation not vulnerable (OK)
CRIME, TLS (CVE-2012-4929) not vulnerable (OK)
BREACH (CVE-2013-3587) potentially NOT ok, "gzip" HTTP compression detected. - only supplied "/" tested
Can be ignored for static pages or if no secrets in the page
POODLE, SSL (CVE-2014-3566) not vulnerable (OK), no SSLv3 support
TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered
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=43BEE2A6A9C92EFB380A5E3A0999860431A2B886970C15F0F18248FC594EB96B could help you to find out
LOGJAM (CVE-2015-4000), experimental common prime with 2048 bits detected: RFC3526/Oakley Group 14 (2048 bits),
but no DH EXPORT ciphers
BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1
LUCKY13 (CVE-2013-0169), experimental potentially VULNERABLE, uses cipher block chaining (CBC) ciphers with TLS. Check patches
RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK)
Testing 370 ciphers via OpenSSL plus sockets against the server, ordered by encryption strength
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 521 AESGCM 256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
xc028 ECDHE-RSA-AES256-SHA384 ECDH 521 AES 256 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
xc014 ECDHE-RSA-AES256-SHA ECDH 521 AES 256 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
x9f DHE-RSA-AES256-GCM-SHA384 DH 2048 AESGCM 256 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
xcca8 ECDHE-RSA-CHACHA20-POLY1305 ECDH 521 ChaCha20 256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
xccaa DHE-RSA-CHACHA20-POLY1305 DH 2048 ChaCha20 256 TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256
xc0a3 DHE-RSA-AES256-CCM8 DH 2048 AESCCM8 256 TLS_DHE_RSA_WITH_AES_256_CCM_8
xc09f DHE-RSA-AES256-CCM DH 2048 AESCCM 256 TLS_DHE_RSA_WITH_AES_256_CCM
x6b DHE-RSA-AES256-SHA256 DH 2048 AES 256 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
x39 DHE-RSA-AES256-SHA DH 2048 AES 256 TLS_DHE_RSA_WITH_AES_256_CBC_SHA
xc077 ECDHE-RSA-CAMELLIA256-SHA384 ECDH 521 Camellia 256 TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384
xc4 DHE-RSA-CAMELLIA256-SHA256 DH 2048 Camellia 256 TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
x88 DHE-RSA-CAMELLIA256-SHA DH 2048 Camellia 256 TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
x9d AES256-GCM-SHA384 RSA AESGCM 256 TLS_RSA_WITH_AES_256_GCM_SHA384
xc0a1 AES256-CCM8 RSA AESCCM8 256 TLS_RSA_WITH_AES_256_CCM_8
xc09d AES256-CCM RSA AESCCM 256 TLS_RSA_WITH_AES_256_CCM
x3d AES256-SHA256 RSA AES 256 TLS_RSA_WITH_AES_256_CBC_SHA256
x35 AES256-SHA RSA AES 256 TLS_RSA_WITH_AES_256_CBC_SHA
xc0 CAMELLIA256-SHA256 RSA Camellia 256 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
x84 CAMELLIA256-SHA RSA Camellia 256 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
xc051 ARIA256-GCM-SHA384 RSA ARIAGCM 256 TLS_RSA_WITH_ARIA_256_GCM_SHA384
xc053 DHE-RSA-ARIA256-GCM-SHA384 DH 2048 ARIAGCM 256 TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384
xc061 ECDHE-ARIA256-GCM-SHA384 ECDH 521 ARIAGCM 256 TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384
x1301 TLS_AES_128_GCM_SHA256 ECDH 253 AESGCM 128 TLS_AES_128_GCM_SHA256
xc02f ECDHE-RSA-AES128-GCM-SHA256 ECDH 521 AESGCM 128 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
xc027 ECDHE-RSA-AES128-SHA256 ECDH 521 AES 128 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
xc013 ECDHE-RSA-AES128-SHA ECDH 521 AES 128 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
x9e DHE-RSA-AES128-GCM-SHA256 DH 2048 AESGCM 128 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
xc0a2 DHE-RSA-AES128-CCM8 DH 2048 AESCCM8 128 TLS_DHE_RSA_WITH_AES_128_CCM_8
xc09e DHE-RSA-AES128-CCM DH 2048 AESCCM 128 TLS_DHE_RSA_WITH_AES_128_CCM
xc0a0 AES128-CCM8 RSA AESCCM8 128 TLS_RSA_WITH_AES_128_CCM_8
xc09c AES128-CCM RSA AESCCM 128 TLS_RSA_WITH_AES_128_CCM
x67 DHE-RSA-AES128-SHA256 DH 2048 AES 128 TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
x33 DHE-RSA-AES128-SHA DH 2048 AES 128 TLS_DHE_RSA_WITH_AES_128_CBC_SHA
xc076 ECDHE-RSA-CAMELLIA128-SHA256 ECDH 521 Camellia 128 TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
xbe DHE-RSA-CAMELLIA128-SHA256 DH 2048 Camellia 128 TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
x45 DHE-RSA-CAMELLIA128-SHA DH 2048 Camellia 128 TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
x9c AES128-GCM-SHA256 RSA AESGCM 128 TLS_RSA_WITH_AES_128_GCM_SHA256
x3c AES128-SHA256 RSA AES 128 TLS_RSA_WITH_AES_128_CBC_SHA256
x2f AES128-SHA RSA AES 128 TLS_RSA_WITH_AES_128_CBC_SHA
xba CAMELLIA128-SHA256 RSA Camellia 128 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
x41 CAMELLIA128-SHA RSA Camellia 128 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
xc050 ARIA128-GCM-SHA256 RSA ARIAGCM 128 TLS_RSA_WITH_ARIA_128_GCM_SHA256
xc052 DHE-RSA-ARIA128-GCM-SHA256 DH 2048 ARIAGCM 128 TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256
xc060 ECDHE-ARIA128-GCM-SHA256 ECDH 521 ARIAGCM 128 TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256
Running client simulations (HTTP) via sockets
Android 4.4.2 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384, 521 bit ECDH (P-521)
Android 5.0.0 TLSv1.2 ECDHE-RSA-AES256-SHA, 521 bit ECDH (P-521)
Android 6.0 TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
Android 7.0 (native) TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
Android 8.1 (native) TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
Android 9.0 (native) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
Android 10.0 (native) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
Chrome 74 (Win 10) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
Chrome 79 (Win 10) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
Firefox 66 (Win 8.1/10) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
Firefox 71 (Win 10) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
IE 6 XP No connection
IE 8 Win 7 No connection
IE 8 XP No connection
IE 11 Win 7 TLSv1.2 ECDHE-RSA-AES256-SHA384, 256 bit ECDH (P-256)
IE 11 Win 8.1 TLSv1.2 ECDHE-RSA-AES256-SHA384, 256 bit ECDH (P-256)
IE 11 Win Phone 8.1 TLSv1.2 AES128-SHA256, No FS
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 66 (Win 10) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
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)
Safari 12.1 (iOS 12.2) TLSv1.3 TLS_CHACHA20_POLY1305_SHA256, 253 bit ECDH (X25519)
Safari 13.0 (macOS 10.14.6) TLSv1.3 TLS_CHACHA20_POLY1305_SHA256, 253 bit ECDH (X25519)
Apple ATS 9 iOS 9 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
Java 6u45 No connection
Java 7u25 No connection
Java 8u161 TLSv1.2 ECDHE-RSA-AES256-SHA384, 256 bit ECDH (P-256)
Java 11.0.2 (OpenJDK) TLSv1.3 TLS_AES_128_GCM_SHA256, 256 bit ECDH (P-256)
Java 12.0.1 (OpenJDK) TLSv1.3 TLS_AES_128_GCM_SHA256, 256 bit ECDH (P-256)
OpenSSL 1.0.2e TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
OpenSSL 1.1.0l (Debian) TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
OpenSSL 1.1.1d (Debian) TLSv1.3 TLS_AES_256_GCM_SHA384, 253 bit ECDH (X25519)
Thunderbird (68.3) TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
Done 2022-06-14 01:43:29 [ 76s] -->> 192.168.33.11:443 (192.168.33.11) <<--
ものすごく詳細に…というかいろいろ確認してくれますね。ビックリしました。
セキュリティに関する項目も含まれています。
チェックしている内容ですが、ドキュメントによるとtestssl.sh [URI]指定だと-Eおよび-gを除いた内容をチェックするようです。
single check as <options> ("testssl.sh URI" does everything except -E and -g):
-e, --each-cipher checks each local cipher remotely
-E, --cipher-per-proto checks those per protocol
-s, --std, --standard tests certain lists of cipher suites by strength
-p, --protocols checks TLS/SSL protocols (including SPDY/HTTP2)
-g, --grease tests several server implementation bugs like GREASE and size limitations
-S, --server-defaults displays the server's default picks and certificate info
-P, --server-preference displays the server's picks: protocol+cipher
-x, --single-cipher <pattern> tests matched <pattern> of ciphers
(if <pattern> not a number: word match)
-c, --client-simulation test client simulations, see which client negotiates with cipher and protocol
-h, --header, --headers tests HSTS, HPKP, server/app banner, security headers, cookie, reverse proxy, IPv4 address
-U, --vulnerable tests all (of the following) vulnerabilities (if applicable)
-H, --heartbleed tests for Heartbleed vulnerability
-I, --ccs, --ccs-injection tests for CCS injection vulnerability
-T, --ticketbleed tests for Ticketbleed vulnerability in BigIP loadbalancers
-BB, --robot tests for Return of Bleichenbacher's Oracle Threat (ROBOT) vulnerability
-R, --renegotiation tests for renegotiation vulnerabilities
-C, --compression, --crime tests for CRIME vulnerability (TLS compression issue)
-B, --breach tests for BREACH vulnerability (HTTP compression issue)
-O, --poodle tests for POODLE (SSL) vulnerability
-Z, --tls-fallback checks TLS_FALLBACK_SCSV mitigation
-W, --sweet32 tests 64 bit block ciphers (3DES, RC2 and IDEA): SWEET32 vulnerability
-A, --beast tests for BEAST vulnerability
-L, --lucky13 tests for LUCKY13
-F, --freak tests for FREAK vulnerability
-J, --logjam tests for LOGJAM vulnerability
-D, --drown tests for DROWN vulnerability
-f, --pfs, --fs, --nsa checks (perfect) forward secrecy settings
-4, --rc4, --appelbaum which RC4 ciphers are being offered?
個々のオプションを指定することで、チェックする内容を絞ることもできるようです。
たとえば、以下は-eと-pで暗号化スイートとプロトコルをチェックします。
$ ./testssl.sh -e -p 192.168.33.11:443
結果。
###########################################################
testssl.sh 3.0.7 from https://testssl.sh/
This program is free software. Distribution and
modification under GPLv2 permitted.
USAGE w/o ANY WARRANTY. USE IT AT YOUR OWN RISK!
Please file bugs @ https://testssl.sh/bugs/
###########################################################
Using "OpenSSL 1.0.2-chacha (1.0.2k-dev)" [~183 ciphers]
on ubuntu2004:./bin/openssl.Linux.x86_64
(built: "Jan 18 17:12:17 2019", platform: "linux-x86_64")
Start 2022-06-14 02:01:46 -->> 192.168.33.11:443 (192.168.33.11) <<--
rDNS (192.168.33.11): --
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 http/1.1 (offered)
Testing 370 ciphers via OpenSSL plus sockets against the server, ordered by encryption strength
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 521 AESGCM 256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
xc028 ECDHE-RSA-AES256-SHA384 ECDH 521 AES 256 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
xc014 ECDHE-RSA-AES256-SHA ECDH 521 AES 256 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
x9f DHE-RSA-AES256-GCM-SHA384 DH 2048 AESGCM 256 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
xcca8 ECDHE-RSA-CHACHA20-POLY1305 ECDH 521 ChaCha20 256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
xccaa DHE-RSA-CHACHA20-POLY1305 DH 2048 ChaCha20 256 TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256
xc0a3 DHE-RSA-AES256-CCM8 DH 2048 AESCCM8 256 TLS_DHE_RSA_WITH_AES_256_CCM_8
xc09f DHE-RSA-AES256-CCM DH 2048 AESCCM 256 TLS_DHE_RSA_WITH_AES_256_CCM
x6b DHE-RSA-AES256-SHA256 DH 2048 AES 256 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
x39 DHE-RSA-AES256-SHA DH 2048 AES 256 TLS_DHE_RSA_WITH_AES_256_CBC_SHA
xc077 ECDHE-RSA-CAMELLIA256-SHA384 ECDH 521 Camellia 256 TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384
xc4 DHE-RSA-CAMELLIA256-SHA256 DH 2048 Camellia 256 TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
x88 DHE-RSA-CAMELLIA256-SHA DH 2048 Camellia 256 TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
x9d AES256-GCM-SHA384 RSA AESGCM 256 TLS_RSA_WITH_AES_256_GCM_SHA384
xc0a1 AES256-CCM8 RSA AESCCM8 256 TLS_RSA_WITH_AES_256_CCM_8
xc09d AES256-CCM RSA AESCCM 256 TLS_RSA_WITH_AES_256_CCM
x3d AES256-SHA256 RSA AES 256 TLS_RSA_WITH_AES_256_CBC_SHA256
x35 AES256-SHA RSA AES 256 TLS_RSA_WITH_AES_256_CBC_SHA
xc0 CAMELLIA256-SHA256 RSA Camellia 256 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
x84 CAMELLIA256-SHA RSA Camellia 256 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
xc051 ARIA256-GCM-SHA384 RSA ARIAGCM 256 TLS_RSA_WITH_ARIA_256_GCM_SHA384
xc053 DHE-RSA-ARIA256-GCM-SHA384 DH 2048 ARIAGCM 256 TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384
xc061 ECDHE-ARIA256-GCM-SHA384 ECDH 521 ARIAGCM 256 TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384
x1301 TLS_AES_128_GCM_SHA256 ECDH 253 AESGCM 128 TLS_AES_128_GCM_SHA256
xc02f ECDHE-RSA-AES128-GCM-SHA256 ECDH 521 AESGCM 128 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
xc027 ECDHE-RSA-AES128-SHA256 ECDH 521 AES 128 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
xc013 ECDHE-RSA-AES128-SHA ECDH 521 AES 128 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
x9e DHE-RSA-AES128-GCM-SHA256 DH 2048 AESGCM 128 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
xc0a2 DHE-RSA-AES128-CCM8 DH 2048 AESCCM8 128 TLS_DHE_RSA_WITH_AES_128_CCM_8
xc09e DHE-RSA-AES128-CCM DH 2048 AESCCM 128 TLS_DHE_RSA_WITH_AES_128_CCM
xc0a0 AES128-CCM8 RSA AESCCM8 128 TLS_RSA_WITH_AES_128_CCM_8
xc09c AES128-CCM RSA AESCCM 128 TLS_RSA_WITH_AES_128_CCM
x67 DHE-RSA-AES128-SHA256 DH 2048 AES 128 TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
x33 DHE-RSA-AES128-SHA DH 2048 AES 128 TLS_DHE_RSA_WITH_AES_128_CBC_SHA
xc076 ECDHE-RSA-CAMELLIA128-SHA256 ECDH 521 Camellia 128 TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
xbe DHE-RSA-CAMELLIA128-SHA256 DH 2048 Camellia 128 TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
x45 DHE-RSA-CAMELLIA128-SHA DH 2048 Camellia 128 TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
x9c AES128-GCM-SHA256 RSA AESGCM 128 TLS_RSA_WITH_AES_128_GCM_SHA256
x3c AES128-SHA256 RSA AES 128 TLS_RSA_WITH_AES_128_CBC_SHA256
x2f AES128-SHA RSA AES 128 TLS_RSA_WITH_AES_128_CBC_SHA
xba CAMELLIA128-SHA256 RSA Camellia 128 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
x41 CAMELLIA128-SHA RSA Camellia 128 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
xc050 ARIA128-GCM-SHA256 RSA ARIAGCM 128 TLS_RSA_WITH_ARIA_128_GCM_SHA256
xc052 DHE-RSA-ARIA128-GCM-SHA256 DH 2048 ARIAGCM 128 TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256
xc060 ECDHE-ARIA128-GCM-SHA256 ECDH 521 ARIAGCM 128 TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256
Done 2022-06-14 02:02:03 [ 19s] -->> 192.168.33.11:443 (192.168.33.11) <<--
コマンドの実行結果を、ファイルに出力することもできるようです。
たとえば、--htmlオプションでカレントディレクトリにHTMLファイルを出力してくれます。
$ ./testssl.sh --html 192.168.33.11:443
指定したホスト名、ポートが含まれるHTMLファイルになるようです。
$ ll *.html -rw-rw-r-- 1 xxxxx xxxxx 25771 6月 14 01:52 192.168.33.11_p443-20220614-0151.html -rw-rw-r-- 1 xxxxx xxxxx 62258 2月 19 22:38 openssl-iana.mapping.html
確認。
けっこうお手軽に使えるので、覚えておくと便利そうですね。
