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compare tls ciphers against Mozilla's recommendations

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This commit is contained in:
Joshua Tauberer 2015-05-20 19:41:04 -04:00
parent 610be9cf17
commit 2c44333679
2 changed files with 51 additions and 6 deletions
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42
tests/tls.py
View file

@ -49,14 +49,34 @@ SSLYZE = "sslyze-0_11-linux64/sslyze/sslyze.py"
common_opts = ["--sslv2", "--sslv3", "--tlsv1", "--tlsv1_1", "--tlsv1_2", "--reneg", "--resum", common_opts = ["--sslv2", "--sslv3", "--tlsv1", "--tlsv1_1", "--tlsv1_2", "--reneg", "--resum",
"--hide_rejected_ciphers", "--compression", "--heartbleed"] "--hide_rejected_ciphers", "--compression", "--heartbleed"]
# Recommendations from Mozilla as of May 20, 2015 at
# https://wiki.mozilla.org/Security/Server_Side_TLS.
#
# The 'modern' ciphers support Firefox 27, Chrome 22, IE 11,
# Opera 14, Safari 7, Android 4.4, Java 8. Assumes TLSv1.1,
# TLSv1.2 only, though we may also be allowing TLSv3.
#
# The 'intermediate' ciphers support Firefox 1, Chrome 1, IE 7,
# Opera 5, Safari 1, Windows XP IE8, Android 2.3, Java 7.
# Assumes TLSv1, TLSv1.1, TLSv1.2.
#
# The 'old' ciphers bring compatibility back to Win XP IE 6.
MOZILLA_CIPHERS_MODERN = "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK"
MOZILLA_CIPHERS_INTERMEDIATE = "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA"
MOZILLA_CIPHERS_OLD = "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA"
###################################################################### ######################################################################
def sslyze(opts, port): def sslyze(opts, port, ok_ciphers):
# Print header. # Print header.
header = ("PORT %d" % port) header = ("PORT %d" % port)
print(header) print(header)
print("-" * (len(header))) print("-" * (len(header)))
# What ciphers should we expect?
ok_ciphers = subprocess.check_output(["openssl", "ciphers", ok_ciphers]).decode("utf8").strip().split(":")
# Form the SSLyze connection string.
connection_string = host + ":" + str(port) connection_string = host + ":" + str(port)
# Proxy via SSH. # Proxy via SSH.
@ -81,6 +101,16 @@ def sslyze(opts, port):
# Print. # Print.
print(out) print(out)
# Pull out the accepted ciphers list for each SSL/TLS protocol
# version outputted.
accepted_ciphers = set()
for ciphers in re.findall(" Accepted:([\w\W]*?)\n *\n", out):
accepted_ciphers |= set(re.findall("\n\s*(\S*)", ciphers))
print(" Should Not Offer: " + (", ".join(sorted(accepted_ciphers-set(ok_ciphers))) or "(none -- good)"))
print(" Could Also Offer: " + (", ".join(sorted(set(ok_ciphers)-accepted_ciphers)) or "(none -- good)"))
print()
finally: finally:
if proxy_proc: if proxy_proc:
proxy_proc.terminate() proxy_proc.terminate()
@ -92,16 +122,16 @@ def sslyze(opts, port):
# Run SSLyze on various ports. # Run SSLyze on various ports.
# SMTP # SMTP
sslyze(["--starttls=smtp"], 25) sslyze(["--starttls=smtp"], 25, MOZILLA_CIPHERS_OLD)
# SMTP Submission # SMTP Submission
sslyze(["--starttls=smtp"], 587) sslyze(["--starttls=smtp"], 587, MOZILLA_CIPHERS_MODERN)
# HTTPS # HTTPS
sslyze(["--http_get", "--chrome_sha1", "--hsts"], 443) sslyze(["--http_get", "--chrome_sha1", "--hsts"], 443, MOZILLA_CIPHERS_INTERMEDIATE)
# IMAP # IMAP
sslyze([], 993) sslyze([], 993, MOZILLA_CIPHERS_MODERN)
# POP3 # POP3
sslyze([], 995) sslyze([], 995, MOZILLA_CIPHERS_MODERN)

15
tests/tls_results.txt
View file

@ -122,6 +122,9 @@ PORT 25
EDH-RSA-DES-CBC3-SHA DH-2048 bits 112 bits 250 2.0.0 Ok EDH-RSA-DES-CBC3-SHA DH-2048 bits 112 bits 250 2.0.0 Ok
DES-CBC3-SHA - 112 bits 250 2.0.0 Ok DES-CBC3-SHA - 112 bits 250 2.0.0 Ok
Should Not Offer: DHE-RSA-SEED-SHA, ECDHE-RSA-RC4-SHA, EDH-RSA-DES-CBC3-SHA, RC4-MD5, RC4-SHA, SEED-SHA
Could Also Offer: DHE-DSS-AES128-GCM-SHA256, DHE-DSS-AES128-SHA, DHE-DSS-AES128-SHA256, DHE-DSS-AES256-GCM-SHA384, DHE-DSS-AES256-SHA, DHE-DSS-AES256-SHA256, DHE-DSS-CAMELLIA128-SHA, DHE-DSS-CAMELLIA256-SHA, ECDHE-ECDSA-AES128-GCM-SHA256, ECDHE-ECDSA-AES128-SHA, ECDHE-ECDSA-AES128-SHA256, ECDHE-ECDSA-AES256-GCM-SHA384, ECDHE-ECDSA-AES256-SHA, ECDHE-ECDSA-AES256-SHA384, ECDHE-ECDSA-DES-CBC3-SHA, SRP-3DES-EDE-CBC-SHA, SRP-AES-128-CBC-SHA, SRP-AES-256-CBC-SHA, SRP-DSS-3DES-EDE-CBC-SHA, SRP-DSS-AES-128-CBC-SHA, SRP-DSS-AES-256-CBC-SHA, SRP-RSA-3DES-EDE-CBC-SHA, SRP-RSA-AES-128-CBC-SHA, SRP-RSA-AES-256-CBC-SHA
PORT 587 PORT 587
-------- --------
@ -208,6 +211,9 @@ PORT 587
CAMELLIA128-SHA - 128 bits 250 2.0.0 Ok CAMELLIA128-SHA - 128 bits 250 2.0.0 Ok
AES128-SHA - 128 bits 250 2.0.0 Ok AES128-SHA - 128 bits 250 2.0.0 Ok
Should Not Offer: AES128-GCM-SHA256, AES128-SHA, AES128-SHA256, AES256-GCM-SHA384, AES256-SHA, AES256-SHA256, CAMELLIA128-SHA, CAMELLIA256-SHA, DHE-RSA-CAMELLIA128-SHA, DHE-RSA-CAMELLIA256-SHA, DHE-RSA-SEED-SHA, SEED-SHA
Could Also Offer: DHE-DSS-AES128-GCM-SHA256, DHE-DSS-AES128-SHA256, DHE-DSS-AES256-GCM-SHA384, DHE-DSS-AES256-SHA, ECDHE-ECDSA-AES128-GCM-SHA256, ECDHE-ECDSA-AES128-SHA, ECDHE-ECDSA-AES128-SHA256, ECDHE-ECDSA-AES256-GCM-SHA384, ECDHE-ECDSA-AES256-SHA, ECDHE-ECDSA-AES256-SHA384
PORT 443 PORT 443
-------- --------
@ -275,6 +281,9 @@ PORT 443
DHE-RSA-AES128-SHA DH-2048 bits 128 bits HTTP 200 OK DHE-RSA-AES128-SHA DH-2048 bits 128 bits HTTP 200 OK
DES-CBC3-SHA - 112 bits HTTP 200 OK DES-CBC3-SHA - 112 bits HTTP 200 OK
Should Not Offer: (none -- good)
Could Also Offer: AES128-GCM-SHA256, AES128-SHA, AES128-SHA256, AES256-GCM-SHA384, AES256-SHA, AES256-SHA256, CAMELLIA128-SHA, CAMELLIA256-SHA, DHE-DSS-AES128-GCM-SHA256, DHE-DSS-AES128-SHA, DHE-DSS-AES128-SHA256, DHE-DSS-AES256-GCM-SHA384, DHE-DSS-AES256-SHA, DHE-DSS-AES256-SHA256, DHE-DSS-CAMELLIA128-SHA, DHE-DSS-CAMELLIA256-SHA, DHE-RSA-CAMELLIA128-SHA, DHE-RSA-CAMELLIA256-SHA, ECDHE-ECDSA-AES128-GCM-SHA256, ECDHE-ECDSA-AES128-SHA, ECDHE-ECDSA-AES128-SHA256, ECDHE-ECDSA-AES256-GCM-SHA384, ECDHE-ECDSA-AES256-SHA, ECDHE-ECDSA-AES256-SHA384, SRP-AES-128-CBC-SHA, SRP-AES-256-CBC-SHA, SRP-DSS-AES-128-CBC-SHA, SRP-DSS-AES-256-CBC-SHA, SRP-RSA-AES-128-CBC-SHA, SRP-RSA-AES-256-CBC-SHA
PORT 993 PORT 993
-------- --------
@ -342,6 +351,9 @@ _nassl.OpenSSLError - error:140940F5:SSL routines:ssl3_read_bytes:unexpected rec
CAMELLIA128-SHA - 128 bits CAMELLIA128-SHA - 128 bits
AES128-SHA - 128 bits AES128-SHA - 128 bits
Should Not Offer: AES128-SHA, AES256-SHA, CAMELLIA128-SHA, CAMELLIA256-SHA, DHE-RSA-CAMELLIA128-SHA, DHE-RSA-CAMELLIA256-SHA
Could Also Offer: DHE-DSS-AES128-GCM-SHA256, DHE-DSS-AES128-SHA256, DHE-DSS-AES256-GCM-SHA384, DHE-DSS-AES256-SHA, DHE-RSA-AES128-GCM-SHA256, DHE-RSA-AES128-SHA256, DHE-RSA-AES256-GCM-SHA384, DHE-RSA-AES256-SHA256, ECDHE-ECDSA-AES128-GCM-SHA256, ECDHE-ECDSA-AES128-SHA, ECDHE-ECDSA-AES128-SHA256, ECDHE-ECDSA-AES256-GCM-SHA384, ECDHE-ECDSA-AES256-SHA, ECDHE-ECDSA-AES256-SHA384, ECDHE-RSA-AES128-GCM-SHA256, ECDHE-RSA-AES128-SHA256, ECDHE-RSA-AES256-GCM-SHA384, ECDHE-RSA-AES256-SHA384
PORT 995 PORT 995
-------- --------
@ -409,3 +421,6 @@ _nassl.OpenSSLError - error:140940F5:SSL routines:ssl3_read_bytes:unexpected rec
CAMELLIA128-SHA - 128 bits CAMELLIA128-SHA - 128 bits
AES128-SHA - 128 bits AES128-SHA - 128 bits
Should Not Offer: AES128-SHA, AES256-SHA, CAMELLIA128-SHA, CAMELLIA256-SHA, DHE-RSA-CAMELLIA128-SHA, DHE-RSA-CAMELLIA256-SHA
Could Also Offer: DHE-DSS-AES128-GCM-SHA256, DHE-DSS-AES128-SHA256, DHE-DSS-AES256-GCM-SHA384, DHE-DSS-AES256-SHA, DHE-RSA-AES128-GCM-SHA256, DHE-RSA-AES128-SHA256, DHE-RSA-AES256-GCM-SHA384, DHE-RSA-AES256-SHA256, ECDHE-ECDSA-AES128-GCM-SHA256, ECDHE-ECDSA-AES128-SHA, ECDHE-ECDSA-AES128-SHA256, ECDHE-ECDSA-AES256-GCM-SHA384, ECDHE-ECDSA-AES256-SHA, ECDHE-ECDSA-AES256-SHA384, ECDHE-RSA-AES128-GCM-SHA256, ECDHE-RSA-AES128-SHA256, ECDHE-RSA-AES256-GCM-SHA384, ECDHE-RSA-AES256-SHA384