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nmap/scripts/ssl-enum-ciphers.nse

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local bin = require "bin"
local coroutine = require "coroutine"
local io = require "io"
local nmap = require "nmap"
local os = require "os"
local shortport = require "shortport"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
description = [[
This script repeatedly initiates SSL/TLS connections, each time trying a new
cipher or compressor while recording whether a host accepts or rejects it. The
end result is a list of all the ciphers and compressors that a server accepts.
Each cipher is shown with a strength rating: one of <code>strong</code>,
<code>weak</code>, or <code>unknown strength</code>. The output line
beginning with <code>Least strength</code> shows the strength of the
weakest cipher offered. If you are auditing for weak ciphers, you would
want to look more closely at any port where <code>Least strength</code>
is not <code>strong</code>. The cipher strength database is in the file
<code>nselib/data/ssl-ciphers</code>, or you can use a different file
through the script argument
<code>ssl-enum-ciphers.rankedcipherlist</code>.
SSLv3/TLSv1 requires more effort to determine which ciphers and compression
methods a server supports than SSLv2. A client lists the ciphers and compressors
that it is capable of supporting, and the server will respond with a single
cipher and compressor chosen, or a rejection notice.
This script is intrusive since it must initiate many connections to a server,
and therefore is quite noisy.
]]
---
-- @usage
-- nmap --script ssl-enum-ciphers -p 443 <host>
--
-- @args ssl-enum-ciphers.rankedcipherlist A path to a file of cipher names and strength ratings
--
-- @output
-- PORT STATE SERVICE REASON
-- 443/tcp open https syn-ack
-- | ssl-enum-ciphers:
-- | SSLv3
-- | Ciphers (6)
-- | TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA - unknown strength
-- | TLS_DHE_RSA_WITH_AES_128_CBC_SHA - strong
-- | TLS_DHE_RSA_WITH_AES_256_CBC_SHA - unknown strength
-- | TLS_RSA_WITH_3DES_EDE_CBC_SHA - strong
-- | TLS_RSA_WITH_AES_128_CBC_SHA - strong
-- | TLS_RSA_WITH_AES_256_CBC_SHA - unknown strength
-- | Compressors (1)
-- | uncompressed
-- | TLSv1.0
-- | Ciphers (6)
-- | TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA - unknown strength
-- | TLS_DHE_RSA_WITH_AES_128_CBC_SHA - strong
-- | TLS_DHE_RSA_WITH_AES_256_CBC_SHA - unknown strength
-- | TLS_RSA_WITH_3DES_EDE_CBC_SHA - strong
-- | TLS_RSA_WITH_AES_128_CBC_SHA - strong
-- | TLS_RSA_WITH_AES_256_CBC_SHA - unknown strength
-- | Compressors (1)
-- | uncompressed
-- |_ Least strength = unknown strength
--
-- @xmloutput
-- <table key="SSLv3">
-- <table key="ciphers">
-- <table>
-- <elem key="strength">strong</elem>
-- <elem key="name">TLS_RSA_WITH_3DES_EDE_CBC_SHA</elem>
-- </table>
-- <table>
-- <elem key="strength">weak</elem>
-- <elem key="name">TLS_RSA_WITH_DES_CBC_SHA</elem>
-- </table>
-- <table>
-- <elem key="strength">strong</elem>
-- <elem key="name">TLS_RSA_WITH_RC4_128_MD5</elem>
-- </table>
-- <table>
-- <elem key="strength">strong</elem>
-- <elem key="name">TLS_RSA_WITH_RC4_128_SHA</elem>
-- </table>
-- </table>
-- <table key="compressors">
-- <elem>NULL</elem>
-- </table>
-- </table>
-- <table key="TLSv1.0">
-- <table key="ciphers">
-- <table>
-- <elem key="strength">strong</elem>
-- <elem key="name">TLS_RSA_WITH_3DES_EDE_CBC_SHA</elem>
-- </table>
-- <table>
-- <elem key="strength">weak</elem>
-- <elem key="name">TLS_RSA_WITH_DES_CBC_SHA</elem>
-- </table>
-- <table>
-- <elem key="strength">strong</elem>
-- <elem key="name">TLS_RSA_WITH_RC4_128_MD5</elem>
-- </table>
-- <table>
-- <elem key="strength">strong</elem>
-- <elem key="name">TLS_RSA_WITH_RC4_128_SHA</elem>
-- </table>
-- </table>
-- <table key="compressors">
-- <elem>NULL</elem>
-- </table>
-- </table>
-- <elem key="least strength">weak</elem>
author = "Mak Kolybabi <mak@kolybabi.com>, Gabriel Lawrence"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"discovery", "intrusive"}
-- Most of the values in the tables below are from:
-- http://www.iana.org/assignments/tls-parameters/
PROTOCOLS = {
["SSLv3"] = 0x0300,
["TLSv1.0"] = 0x0301,
["TLSv1.1"] = 0x0302,
["TLSv1.2"] = 0x0303
}
--
-- TLS Record Types
--
TLS_RECORD_HEADER_LENGTH = 5
TLS_CONTENTTYPE_REGISTRY = {
["change_cipher_spec"] = 20,
["alert"] = 21,
["handshake"] = 22,
["application_data"] = 23
}
--
-- TLS Alert Levels
--
TLS_ALERT_LEVELS = {
["warning"] = 1,
["fatal"] = 2,
}
--
-- TLS Alert Record Types
--
TLS_ALERT_REGISTRY = {
["close_notify"] = 0,
["unexpected_message"] = 10,
["bad_record_mac"] = 20,
["decryption_failed"] = 21,
["record_overflow"] = 22,
["decompression_failure"] = 30,
["handshake_failure"] = 40,
["no_certificate"] = 41,
["bad_certificate"] = 42,
["unsupported_certificate"] = 43,
["certificate_revoked"] = 44,
["certificate_expired"] = 45,
["certificate_unknown"] = 46,
["illegal_parameter"] = 47,
["unknown_ca"] = 48,
["access_denied"] = 49,
["decode_error"] = 50,
["decrypt_error"] = 51,
["export_restriction"] = 60,
["protocol_version"] = 70,
["insufficient_security"] = 71,
["internal_error"] = 80,
["user_canceled"] = 90,
["no_renegotiation"] = 100,
["unsupported_extension"] = 110,
["certificate_unobtainable"] = 111,
["unrecognized_name"] = 112,
["bad_certificate_status_response"] = 113,
["bad_certificate_hash_value"] = 114,
["unknown_psk_identity"] = 115
}
--
-- TLS Handshake Record Types
--
TLS_HANDSHAKETYPE_REGISTRY = {
["hello_request"] = 0,
["client_hello"] = 1,
["server_hello"] = 2,
["hello_verify_request"] = 3,
["NewSessionTicket"] = 4,
["certificate"] = 11,
["server_key_exchange"] = 12,
["certificate_request"] = 13,
["server_hello_done"] = 14,
["certificate_verify"] = 15,
["client_key_exchange"] = 16,
["finished"] = 20,
["certificate_url"] = 21,
["certificate_status"] = 22,
["supplemental_data"] = 23
}
--
-- Compression Algorithms
-- http://www.iana.org/assignments/comp-meth-ids
--
COMPRESSORS = {
["NULL"] = 0,
["DEFLATE"] = 1,
["LZS"] = 64
}
--
-- Encryption Algorithms
--
CIPHERS = {
["TLS_NULL_WITH_NULL_NULL"] = 0x0000,
["TLS_RSA_WITH_NULL_MD5"] = 0x0001,
["TLS_RSA_WITH_NULL_SHA"] = 0x0002,
["TLS_RSA_EXPORT_WITH_RC4_40_MD5"] = 0x0003,
["TLS_RSA_WITH_RC4_128_MD5"] = 0x0004,
["TLS_RSA_WITH_RC4_128_SHA"] = 0x0005,
["TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5"] = 0x0006,
["TLS_RSA_WITH_IDEA_CBC_SHA"] = 0x0007,
["TLS_RSA_EXPORT_WITH_DES40_CBC_SHA"] = 0x0008,
["TLS_RSA_WITH_DES_CBC_SHA"] = 0x0009,
["TLS_RSA_WITH_3DES_EDE_CBC_SHA"] = 0x000A,
["TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA"] = 0x000B,
["TLS_DH_DSS_WITH_DES_CBC_SHA"] = 0x000C,
["TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA"] = 0x000D,
["TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA"] = 0x000E,
["TLS_DH_RSA_WITH_DES_CBC_SHA"] = 0x000F,
["TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA"] = 0x0010,
["TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA"] = 0x0011,
["TLS_DHE_DSS_WITH_DES_CBC_SHA"] = 0x0012,
["TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA"] = 0x0013,
["TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA"] = 0x0014,
["TLS_DHE_RSA_WITH_DES_CBC_SHA"] = 0x0015,
["TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA"] = 0x0016,
["TLS_DH_anon_EXPORT_WITH_RC4_40_MD5"] = 0x0017,
["TLS_DH_anon_WITH_RC4_128_MD5"] = 0x0018,
["TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA"] = 0x0019,
["TLS_DH_anon_WITH_DES_CBC_SHA"] = 0x001A,
["TLS_DH_anon_WITH_3DES_EDE_CBC_SHA"] = 0x001B,
["SSL_FORTEZZA_KEA_WITH_NULL_SHA"] = 0x001C,
["SSL_FORTEZZA_KEA_WITH_FORTEZZA_CBC_SHA"] = 0x001D,
["TLS_KRB5_WITH_DES_CBC_SHA-or-SSL_FORTEZZA_KEA_WITH_RC4_128_SHA"] = 0x001E, --TLS vs SSLv3
["TLS_KRB5_WITH_3DES_EDE_CBC_SHA"] = 0x001F,
["TLS_KRB5_WITH_RC4_128_SHA"] = 0x0020,
["TLS_KRB5_WITH_IDEA_CBC_SHA"] = 0x0021,
["TLS_KRB5_WITH_DES_CBC_MD5"] = 0x0022,
["TLS_KRB5_WITH_3DES_EDE_CBC_MD5"] = 0x0023,
["TLS_KRB5_WITH_RC4_128_MD5"] = 0x0024,
["TLS_KRB5_WITH_IDEA_CBC_MD5"] = 0x0025,
["TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA"] = 0x0026,
["TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA"] = 0x0027,
["TLS_KRB5_EXPORT_WITH_RC4_40_SHA"] = 0x0028,
["TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5"] = 0x0029,
["TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5"] = 0x002A,
["TLS_KRB5_EXPORT_WITH_RC4_40_MD5"] = 0x002B,
["TLS_PSK_WITH_NULL_SHA"] = 0x002C,
["TLS_DHE_PSK_WITH_NULL_SHA"] = 0x002D,
["TLS_RSA_PSK_WITH_NULL_SHA"] = 0x002E,
["TLS_RSA_WITH_AES_128_CBC_SHA"] = 0x002F,
["TLS_DH_DSS_WITH_AES_128_CBC_SHA"] = 0x0030,
["TLS_DH_RSA_WITH_AES_128_CBC_SHA"] = 0x0031,
["TLS_DHE_DSS_WITH_AES_128_CBC_SHA"] = 0x0032,
["TLS_DHE_RSA_WITH_AES_128_CBC_SHA"] = 0x0033,
["TLS_DH_anon_WITH_AES_128_CBC_SHA"] = 0x0034,
["TLS_RSA_WITH_AES_256_CBC_SHA"] = 0x0035,
["TLS_DH_DSS_WITH_AES_256_CBC_SHA"] = 0x0036,
["TLS_DH_RSA_WITH_AES_256_CBC_SHA"] = 0x0037,
["TLS_DHE_DSS_WITH_AES_256_CBC_SHA"] = 0x0038,
["TLS_DHE_RSA_WITH_AES_256_CBC_SHA"] = 0x0039,
["TLS_DH_anon_WITH_AES_256_CBC_SHA"] = 0x003A,
["TLS_RSA_WITH_NULL_SHA256"] = 0x003B,
["TLS_RSA_WITH_AES_128_CBC_SHA256"] = 0x003C,
["TLS_RSA_WITH_AES_256_CBC_SHA256"] = 0x003D,
["TLS_DH_DSS_WITH_AES_128_CBC_SHA256"] = 0x003E,
["TLS_DH_RSA_WITH_AES_128_CBC_SHA256"] = 0x003F,
["TLS_DHE_DSS_WITH_AES_128_CBC_SHA256"] = 0x0040,
["TLS_RSA_WITH_CAMELLIA_128_CBC_SHA"] = 0x0041,
["TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA"] = 0x0042,
["TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA"] = 0x0043,
["TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA"] = 0x0044,
["TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA"] = 0x0045,
["TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA"] = 0x0046,
["TLS_ECDH_ECDSA_WITH_NULL_SHA-draft"] = 0x0047, --draft-ietf-tls-ecc-00
["TLS_ECDH_ECDSA_WITH_RC4_128_SHA-draft"] = 0x0048, --draft-ietf-tls-ecc-00
["TLS_ECDH_ECDSA_WITH_DES_CBC_SHA-draft"] = 0x0049, --draft-ietf-tls-ecc-00
["TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA-draft"] = 0x004A, --draft-ietf-tls-ecc-00
["TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA-draft"] = 0x004B, --draft-ietf-tls-ecc-00
["TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA-draft"] = 0x004C, --draft-ietf-tls-ecc-00
["TLS_ECDH_ECNRA_WITH_DES_CBC_SHA-draft"] = 0x004D, --draft-ietf-tls-ecc-00
["TLS_ECDH_ECNRA_WITH_3DES_EDE_CBC_SHA-draft"] = 0x004E, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECDSA_NULL_SHA-draft"] = 0x004F, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECDSA_WITH_RC4_128_SHA-draft"] = 0x0050, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECDSA_WITH_DES_CBC_SHA-draft"] = 0x0051, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECDSA_WITH_3DES_EDE_CBC_SHA-draft"] = 0x0052, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECNRA_NULL_SHA-draft"] = 0x0053, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECNRA_WITH_RC4_128_SHA-draft"] = 0x0054, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECNRA_WITH_DES_CBC_SHA-draft"] = 0x0055, --draft-ietf-tls-ecc-00
["TLS_ECMQV_ECNRA_WITH_3DES_EDE_CBC_SHA-draft"] = 0x0056, --draft-ietf-tls-ecc-00
["TLS_ECDH_anon_NULL_WITH_SHA-draft"] = 0x0057, --draft-ietf-tls-ecc-00
["TLS_ECDH_anon_WITH_RC4_128_SHA-draft"] = 0x0058, --draft-ietf-tls-ecc-00
["TLS_ECDH_anon_WITH_DES_CBC_SHA-draft"] = 0x0059, --draft-ietf-tls-ecc-00
["TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA-draft"] = 0x005A, --draft-ietf-tls-ecc-00
["TLS_ECDH_anon_EXPORT_WITH_DES40_CBC_SHA-draft"] = 0x005B, --draft-ietf-tls-ecc-00
["TLS_ECDH_anon_EXPORT_WITH_RC4_40_SHA-draft"] = 0x005C, --draft-ietf-tls-ecc-00
["TLS_RSA_EXPORT1024_WITH_RC4_56_MD5"] = 0x0060,
["TLS_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5"] = 0x0061,
["TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA"] = 0x0062,
["TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA"] = 0x0063,
["TLS_RSA_EXPORT1024_WITH_RC4_56_SHA"] = 0x0064,
["TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA"] = 0x0065,
["TLS_DHE_DSS_WITH_RC4_128_SHA"] = 0x0066,
["TLS_DHE_RSA_WITH_AES_128_CBC_SHA256"] = 0x0067,
["TLS_DH_DSS_WITH_AES_256_CBC_SHA256"] = 0x0068,
["TLS_DH_RSA_WITH_AES_256_CBC_SHA256"] = 0x0069,
["TLS_DHE_DSS_WITH_AES_256_CBC_SHA256"] = 0x006A,
["TLS_DHE_RSA_WITH_AES_256_CBC_SHA256"] = 0x006B,
["TLS_DH_anon_WITH_AES_128_CBC_SHA256"] = 0x006C,
["TLS_DH_anon_WITH_AES_256_CBC_SHA256"] = 0x006D,
["TLS_DHE_DSS_WITH_3DES_EDE_CBC_RMD"] = 0x0072, --draft-ietf-tls-openpgp-keys-05
["TLS_DHE_DSS_WITH_AES_128_CBC_RMD"] = 0x0073, --draft-ietf-tls-openpgp-keys-05
["TLS_DHE_DSS_WITH_AES_256_CBC_RMD"] = 0x0074, --draft-ietf-tls-openpgp-keys-05
["TLS_DHE_RSA_WITH_3DES_EDE_CBC_RMD"] = 0x0077, --draft-ietf-tls-openpgp-keys-05
["TLS_DHE_RSA_WITH_AES_128_CBC_RMD"] = 0x0078, --draft-ietf-tls-openpgp-keys-05
["TLS_DHE_RSA_WITH_AES_256_CBC_RMD"] = 0x0079, --draft-ietf-tls-openpgp-keys-05
["TLS_RSA_WITH_3DES_EDE_CBC_RMD"] = 0x007C, --draft-ietf-tls-openpgp-keys-05
["TLS_RSA_WITH_AES_128_CBC_RMD"] = 0x007D, --draft-ietf-tls-openpgp-keys-05
["TLS_RSA_WITH_AES_256_CBC_RMD"] = 0x007E, --draft-ietf-tls-openpgp-keys-05
["TLS_GOSTR341094_WITH_28147_CNT_IMIT"] = 0x0080, --draft-chudov-cryptopro-cptls-04
["TLS_GOSTR341001_WITH_28147_CNT_IMIT"] = 0x0081, --draft-chudov-cryptopro-cptls-04
["TLS_GOSTR341094_WITH_NULL_GOSTR3411"] = 0x0082, --draft-chudov-cryptopro-cptls-04
["TLS_GOSTR341001_WITH_NULL_GOSTR3411"] = 0x0083, --draft-chudov-cryptopro-cptls-04
["TLS_RSA_WITH_CAMELLIA_256_CBC_SHA"] = 0x0084,
["TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA"] = 0x0085,
["TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA"] = 0x0086,
["TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA"] = 0x0087,
["TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA"] = 0x0088,
["TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA"] = 0x0089,
["TLS_PSK_WITH_RC4_128_SHA"] = 0x008A,
["TLS_PSK_WITH_3DES_EDE_CBC_SHA"] = 0x008B,
["TLS_PSK_WITH_AES_128_CBC_SHA"] = 0x008C,
["TLS_PSK_WITH_AES_256_CBC_SHA"] = 0x008D,
["TLS_DHE_PSK_WITH_RC4_128_SHA"] = 0x008E,
["TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA"] = 0x008F,
["TLS_DHE_PSK_WITH_AES_128_CBC_SHA"] = 0x0090,
["TLS_DHE_PSK_WITH_AES_256_CBC_SHA"] = 0x0091,
["TLS_RSA_PSK_WITH_RC4_128_SHA"] = 0x0092,
["TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA"] = 0x0093,
["TLS_RSA_PSK_WITH_AES_128_CBC_SHA"] = 0x0094,
["TLS_RSA_PSK_WITH_AES_256_CBC_SHA"] = 0x0095,
["TLS_RSA_WITH_SEED_CBC_SHA"] = 0x0096,
["TLS_DH_DSS_WITH_SEED_CBC_SHA"] = 0x0097,
["TLS_DH_RSA_WITH_SEED_CBC_SHA"] = 0x0098,
["TLS_DHE_DSS_WITH_SEED_CBC_SHA"] = 0x0099,
["TLS_DHE_RSA_WITH_SEED_CBC_SHA"] = 0x009A,
["TLS_DH_anon_WITH_SEED_CBC_SHA"] = 0x009B,
["TLS_RSA_WITH_AES_128_GCM_SHA256"] = 0x009C,
["TLS_RSA_WITH_AES_256_GCM_SHA384"] = 0x009D,
["TLS_DHE_RSA_WITH_AES_128_GCM_SHA256"] = 0x009E,
["TLS_DHE_RSA_WITH_AES_256_GCM_SHA384"] = 0x009F,
["TLS_DH_RSA_WITH_AES_128_GCM_SHA256"] = 0x00A0,
["TLS_DH_RSA_WITH_AES_256_GCM_SHA384"] = 0x00A1,
["TLS_DHE_DSS_WITH_AES_128_GCM_SHA256"] = 0x00A2,
["TLS_DHE_DSS_WITH_AES_256_GCM_SHA384"] = 0x00A3,
["TLS_DH_DSS_WITH_AES_128_GCM_SHA256"] = 0x00A4,
["TLS_DH_DSS_WITH_AES_256_GCM_SHA384"] = 0x00A5,
["TLS_DH_anon_WITH_AES_128_GCM_SHA256"] = 0x00A6,
["TLS_DH_anon_WITH_AES_256_GCM_SHA384"] = 0x00A7,
["TLS_PSK_WITH_AES_128_GCM_SHA256"] = 0x00A8,
["TLS_PSK_WITH_AES_256_GCM_SHA384"] = 0x00A9,
["TLS_DHE_PSK_WITH_AES_128_GCM_SHA256"] = 0x00AA,
["TLS_DHE_PSK_WITH_AES_256_GCM_SHA384"] = 0x00AB,
["TLS_RSA_PSK_WITH_AES_128_GCM_SHA256"] = 0x00AC,
["TLS_RSA_PSK_WITH_AES_256_GCM_SHA384"] = 0x00AD,
["TLS_PSK_WITH_AES_128_CBC_SHA256"] = 0x00AE,
["TLS_PSK_WITH_AES_256_CBC_SHA384"] = 0x00AF,
["TLS_PSK_WITH_NULL_SHA256"] = 0x00B0,
["TLS_PSK_WITH_NULL_SHA384"] = 0x00B1,
["TLS_DHE_PSK_WITH_AES_128_CBC_SHA256"] = 0x00B2,
["TLS_DHE_PSK_WITH_AES_256_CBC_SHA384"] = 0x00B3,
["TLS_DHE_PSK_WITH_NULL_SHA256"] = 0x00B4,
["TLS_DHE_PSK_WITH_NULL_SHA384"] = 0x00B5,
["TLS_RSA_PSK_WITH_AES_128_CBC_SHA256"] = 0x00B6,
["TLS_RSA_PSK_WITH_AES_256_CBC_SHA384"] = 0x00B7,
["TLS_RSA_PSK_WITH_NULL_SHA256"] = 0x00B8,
["TLS_RSA_PSK_WITH_NULL_SHA384"] = 0x00B9,
["TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256"] = 0x00BA,
["TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256"] = 0x00BB,
["TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256"] = 0x00BC,
["TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256"] = 0x00BD,
["TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256"] = 0x00BE,
["TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256"] = 0x00BF,
["TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256"] = 0x00C0,
["TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256"] = 0x00C1,
["TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256"] = 0x00C2,
["TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256"] = 0x00C3,
["TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256"] = 0x00C4,
["TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256"] = 0x00C5,
["TLS_ECDH_ECDSA_WITH_NULL_SHA"] = 0xC001,
["TLS_ECDH_ECDSA_WITH_RC4_128_SHA"] = 0xC002,
["TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA"] = 0xC003,
["TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA"] = 0xC004,
["TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA"] = 0xC005,
["TLS_ECDHE_ECDSA_WITH_NULL_SHA"] = 0xC006,
["TLS_ECDHE_ECDSA_WITH_RC4_128_SHA"] = 0xC007,
["TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA"] = 0xC008,
["TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA"] = 0xC009,
["TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA"] = 0xC00A,
["TLS_ECDH_RSA_WITH_NULL_SHA"] = 0xC00B,
["TLS_ECDH_RSA_WITH_RC4_128_SHA"] = 0xC00C,
["TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA"] = 0xC00D,
["TLS_ECDH_RSA_WITH_AES_128_CBC_SHA"] = 0xC00E,
["TLS_ECDH_RSA_WITH_AES_256_CBC_SHA"] = 0xC00F,
["TLS_ECDHE_RSA_WITH_NULL_SHA"] = 0xC010,
["TLS_ECDHE_RSA_WITH_RC4_128_SHA"] = 0xC011,
["TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA"] = 0xC012,
["TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA"] = 0xC013,
["TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA"] = 0xC014,
["TLS_ECDH_anon_WITH_NULL_SHA"] = 0xC015,
["TLS_ECDH_anon_WITH_RC4_128_SHA"] = 0xC016,
["TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA"] = 0xC017,
["TLS_ECDH_anon_WITH_AES_128_CBC_SHA"] = 0xC018,
["TLS_ECDH_anon_WITH_AES_256_CBC_SHA"] = 0xC019,
["TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA"] = 0xC01A,
["TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA"] = 0xC01B,
["TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA"] = 0xC01C,
["TLS_SRP_SHA_WITH_AES_128_CBC_SHA"] = 0xC01D,
["TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA"] = 0xC01E,
["TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA"] = 0xC01F,
["TLS_SRP_SHA_WITH_AES_256_CBC_SHA"] = 0xC020,
["TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA"] = 0xC021,
["TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA"] = 0xC022,
["TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256"] = 0xC023,
["TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384"] = 0xC024,
["TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256"] = 0xC025,
["TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384"] = 0xC026,
["TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"] = 0xC027,
["TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384"] = 0xC028,
["TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256"] = 0xC029,
["TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384"] = 0xC02A,
["TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256"] = 0xC02B,
["TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384"] = 0xC02C,
["TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256"] = 0xC02D,
["TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384"] = 0xC02E,
["TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256"] = 0xC02F,
["TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384"] = 0xC030,
["TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256"] = 0xC031,
["TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384"] = 0xC032,
["TLS_ECDHE_PSK_WITH_RC4_128_SHA"] = 0xC033,
["TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA"] = 0xC034,
["TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA"] = 0xC035,
["TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA"] = 0xC036,
["TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256"] = 0xC037,
["TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384"] = 0xC038,
["TLS_ECDHE_PSK_WITH_NULL_SHA"] = 0xC039,
["TLS_ECDHE_PSK_WITH_NULL_SHA256"] = 0xC03A,
["TLS_ECDHE_PSK_WITH_NULL_SHA384"] = 0xC03B,
["TLS_RSA_WITH_ARIA_128_CBC_SHA256"] = 0xC03C,
["TLS_RSA_WITH_ARIA_256_CBC_SHA384"] = 0xC03D,
["TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256"] = 0xC03E,
["TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384"] = 0xC03F,
["TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256"] = 0xC040,
["TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384"] = 0xC041,
["TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256"] = 0xC042,
["TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384"] = 0xC043,
["TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256"] = 0xC044,
["TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384"] = 0xC045,
["TLS_DH_anon_WITH_ARIA_128_CBC_SHA256"] = 0xC046,
["TLS_DH_anon_WITH_ARIA_256_CBC_SHA384"] = 0xC047,
["TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256"] = 0xC048,
["TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384"] = 0xC049,
["TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256"] = 0xC04A,
["TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384"] = 0xC04B,
["TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256"] = 0xC04C,
["TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384"] = 0xC04D,
["TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256"] = 0xC04E,
["TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384"] = 0xC04F,
["TLS_RSA_WITH_ARIA_128_GCM_SHA256"] = 0xC050,
["TLS_RSA_WITH_ARIA_256_GCM_SHA384"] = 0xC051,
["TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256"] = 0xC052,
["TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384"] = 0xC053,
["TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256"] = 0xC054,
["TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384"] = 0xC055,
["TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256"] = 0xC056,
["TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384"] = 0xC057,
["TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256"] = 0xC058,
["TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384"] = 0xC059,
["TLS_DH_anon_WITH_ARIA_128_GCM_SHA256"] = 0xC05A,
["TLS_DH_anon_WITH_ARIA_256_GCM_SHA384"] = 0xC05B,
["TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256"] = 0xC05C,
["TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384"] = 0xC05D,
["TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256"] = 0xC05E,
["TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384"] = 0xC05F,
["TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256"] = 0xC060,
["TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384"] = 0xC061,
["TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256"] = 0xC062,
["TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384"] = 0xC063,
["TLS_PSK_WITH_ARIA_128_CBC_SHA256"] = 0xC064,
["TLS_PSK_WITH_ARIA_256_CBC_SHA384"] = 0xC065,
["TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256"] = 0xC066,
["TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384"] = 0xC067,
["TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256"] = 0xC068,
["TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384"] = 0xC069,
["TLS_PSK_WITH_ARIA_128_GCM_SHA256"] = 0xC06A,
["TLS_PSK_WITH_ARIA_256_GCM_SHA384"] = 0xC06B,
["TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256"] = 0xC06C,
["TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384"] = 0xC06D,
["TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256"] = 0xC06E,
["TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384"] = 0xC06F,
["TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256"] = 0xC070,
["TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384"] = 0xC071,
["TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC072,
["TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC073,
["TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC074,
["TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC075,
["TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC076,
["TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC077,
["TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC078,
["TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC079,
["TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC07A,
["TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC07B,
["TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC07C,
["TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC07D,
["TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC07E,
["TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC07F,
["TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC080,
["TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC081,
["TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC082,
["TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC083,
["TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC084,
["TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC085,
["TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC086,
["TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC087,
["TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC088,
["TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC089,
["TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC08A,
["TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC08B,
["TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC08C,
["TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC08D,
["TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC08E,
["TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC08F,
["TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC090,
["TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC091,
["TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256"] = 0xC092,
["TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384"] = 0xC093,
["TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC094,
["TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC095,
["TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC096,
["TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC097,
["TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC098,
["TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC099,
["TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256"] = 0xC09A,
["TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384"] = 0xC09B,
["TLS_RSA_WITH_AES_128_CCM"] = 0xC09C,
["TLS_RSA_WITH_AES_256_CCM"] = 0xC09D,
["TLS_DHE_RSA_WITH_AES_128_CCM"] = 0xC09E,
["TLS_DHE_RSA_WITH_AES_256_CCM"] = 0xC09F,
["TLS_RSA_WITH_AES_128_CCM_8"] = 0xC0A0,
["TLS_RSA_WITH_AES_256_CCM_8"] = 0xC0A1,
["TLS_DHE_RSA_WITH_AES_128_CCM_8"] = 0xC0A2,
["TLS_DHE_RSA_WITH_AES_256_CCM_8"] = 0xC0A3,
["TLS_PSK_WITH_AES_128_CCM"] = 0xC0A4,
["TLS_PSK_WITH_AES_256_CCM"] = 0xC0A5,
["TLS_DHE_PSK_WITH_AES_128_CCM"] = 0xC0A6,
["TLS_DHE_PSK_WITH_AES_256_CCM"] = 0xC0A7,
["TLS_PSK_WITH_AES_128_CCM_8"] = 0xC0A8,
["TLS_PSK_WITH_AES_256_CCM_8"] = 0xC0A9,
["TLS_PSK_DHE_WITH_AES_128_CCM_8"] = 0xC0AA,
["TLS_PSK_DHE_WITH_AES_256_CCM_8"] = 0xC0AB,
["TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256"] = 0xCC13,
["TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256"] = 0xCC14,
["TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256"] = 0xCC15,
["SSL_RSA_FIPS_WITH_DES_CBC_SHA"] = 0xFEFE,
["SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA"] = 0xFEFF,
}
cipherstrength = {
["broken"] = 0,
["weak"] = 1,
["unknown strength"] = 2,
["strong"] = 3
}
local rankedciphers={}
local mincipherstrength=9999 --artificial "highest value"
local rankedciphersfilename=false
local policy=true
local function record_read(buffer, i)
local b, h, j, len
local function find_key(t, value)
local k, v
for k, v in pairs(t) do
if v == value then
return k
end
end
return nil
end
------------
-- Header --
------------
-- Ensure we have enough data for the header.
if #buffer - i < TLS_RECORD_HEADER_LENGTH then
return i, nil
end
-- Parse header.
h = {}
j, h["type"] = bin.unpack("C", buffer, i)
j, h["protocol"] = bin.unpack(">S", buffer, j)
j, h["length"] = bin.unpack(">S", buffer, j)
-- Ensure we have enough data for the body.
len = j + h["length"] - 1
if #buffer < len then
return i, nil
end
-- Convert to human-readable form.
h["type"] = find_key(TLS_CONTENTTYPE_REGISTRY, h["type"])
h["protocol"] = find_key(PROTOCOLS, h["protocol"])
----------
-- Body --
----------
b = {}
h["body"] = b
if h["type"] == "alert" then
-- Parse body.
j, b["level"] = bin.unpack("C", buffer, j)
j, b["description"] = bin.unpack("C", buffer, j)
-- Convert to human-readable form.
b["level"] = find_key(TLS_ALERT_LEVELS, b["level"])
b["description"] = find_key(TLS_ALERT_REGISTRY, b["description"])
elseif h["type"] == "handshake" then
-- Parse body.
j, b["type"] = bin.unpack("C", buffer, j)
local _
j, _ = bin.unpack("A3", buffer, j)
-- Convert to human-readable form.
b["type"] = find_key(TLS_HANDSHAKETYPE_REGISTRY, b["type"])
if b["type"] == "server_hello" then
-- Parse body.
j, b["protocol"] = bin.unpack(">S", buffer, j)
j, b["time"] = bin.unpack(">I", buffer, j)
j, b["random"] = bin.unpack("A28", buffer, j)
j, b["session_id_length"] = bin.unpack("C", buffer, j)
j, b["session_id"] = bin.unpack("A" .. b["session_id_length"], buffer, j)
j, b["cipher"] = bin.unpack(">S", buffer, j)
j, b["compressor"] = bin.unpack("C", buffer, j)
-- Convert to human-readable form.
b["protocol"] = find_key(PROTOCOLS, b["protocol"])
b["cipher"] = find_key(CIPHERS, b["cipher"])
b["compressor"] = find_key(COMPRESSORS, b["compressor"])
end
end
-- Ignore unparsed bytes.
j = len
return j, h
end
local function record_write(type, protocol, b)
local h
h = ""
-- Set the header as a handshake.
h = h .. bin.pack("C", TLS_CONTENTTYPE_REGISTRY[type])
-- Set the protocol.
h = h .. bin.pack(">S", PROTOCOLS[protocol])
-- Set the length of the header body.
h = h .. bin.pack(">S", #b)
return h .. b
end
local function client_hello(t)
local b, cipher, ciphers, compressor, compressors, h, len
----------
-- Body --
----------
b = ""
-- Set the protocol.
b = b .. bin.pack(">S", PROTOCOLS[t["protocol"]])
-- Set the random data.
b = b .. bin.pack(">I", os.time())
-- Set the random data.
b = b .. string.rep("nmap", 7)
-- Set the session ID.
b = b .. bin.pack("C", 0)
-- Cipher suites.
ciphers = ""
if t["ciphers"] ~= nil then
-- Add specified ciphers.
for _, cipher in pairs(t["ciphers"]) do
ciphers = ciphers .. bin.pack(">S", CIPHERS[cipher])
end
else
-- Add all known ciphers.
for _, cipher in pairs(CIPHERS) do
ciphers = ciphers .. bin.pack(">S", cipher)
end
end
b = b .. bin.pack(">S", #ciphers)
b = b .. ciphers
-- Compression methods.
compressors = ""
if t["compressors"] ~= nil then
-- Add specified compressors.
for _, compressor in pairs(t["compressors"]) do
if compressor ~= "NULL" then
compressors = compressors .. bin.pack("C", COMPRESSORS[compressor])
end
end
compressors = compressors .. bin.pack("C", 0) -- Always include NULL as last choice
else
-- Add all known compressors.
for _, compressor in pairs(COMPRESSORS) do
compressors = compressors .. bin.pack("C", compressor)
end
end
b = b .. bin.pack("C", #compressors)
b = b .. compressors
------------
-- Header --
------------
h = ""
-- Set type to ClientHello.
h = h .. bin.pack("C", TLS_HANDSHAKETYPE_REGISTRY["client_hello"])
-- Set the length of the body.
len = bin.pack(">I", #b)
h = h .. bin.pack("CCC", len:byte(2), len:byte(3), len:byte(4))
return record_write("handshake", t["protocol"], h .. b)
end
local function try_params(host, port, t)
local buffer, err, i, record, req, resp, sock, status
-- Create socket.
sock = nmap.new_socket()
sock:set_timeout(5000)
status, err = sock:connect(host, port, "tcp")
if not status then
stdnse.print_debug(1, "Can't connect: %s", err)
sock:close()
return nil
end
-- Send request.
req = client_hello(t)
status, err = sock:send(req)
if not status then
stdnse.print_debug(1, "Can't send: %s", err)
sock:close()
return nil
end
-- Read response.
i = 0
buffer = ""
record = nil
while true do
status, resp = sock:receive()
if not status then
sock:close()
return nil
end
buffer = buffer .. resp
-- Parse response.
i, record = record_read(buffer, i)
if record ~= nil then
sock:close()
return record
end
end
end
local function keys(t)
local ret = {}
for k, _ in pairs(t) do
ret[#ret+1] = k
end
return ret
end
local function keys_in_chunks(t)
local ret = {{}}
local c = 0
local b = 1
for k, _ in pairs(t) do
c = c+1
ret[b][c] = k
if c > 64 then
c = 0
b = b + 1
ret[b] = {}
end
end
return ret
end
local function remove(t, e)
for i, v in ipairs(t) do
if v == e then
table.remove(t, i)
return i
end
end
return nil
end
local function find_ciphers(host, port, protocol)
local name, protocol_worked, record, results, t,cipherstr
local ciphers = keys_in_chunks(CIPHERS)
results = {}
-- Try every cipher.
protocol_worked = false
for _, group in ipairs(ciphers) do
while (next(group)) do
-- Create structure.
t = {
["ciphers"] = group,
["protocol"] = protocol
}
record = try_params(host, port, t)
if record == nil then
if protocol_worked then
stdnse.print_debug(2, "%d ciphers rejected. (No handshake)", #group)
else
stdnse.print_debug(1, "%d ciphers and/or protocol %s rejected. (No handshake)", #group, protocol)
end
break
elseif record["protocol"] ~= protocol then
stdnse.print_debug(1, "Protocol %s rejected.", protocol)
protocol_worked = nil
break
elseif record["type"] == "alert" and record["body"]["description"] == "handshake_failure" then
protocol_worked = true
stdnse.print_debug(2, "%d ciphers rejected.", #group)
break
elseif record["type"] ~= "handshake" or record["body"]["type"] ~= "server_hello" then
stdnse.print_debug(2, "Unexpected record received.")
break
else
protocol_worked = true
name = record["body"]["cipher"]
stdnse.print_debug(2, "Cipher %s chosen.", name)
remove(group, name)
-- Add cipher to the list of accepted ciphers.
table.insert(results, name)
end
end
if protocol_worked == nil then return nil end
end
if not protocol_worked then return nil end
return results
end
local function find_compressors(host, port, protocol, good_cipher)
local name, protocol_worked, record, results, t
local compressors = keys(COMPRESSORS)
results = {}
-- Try every compressor.
protocol_worked = false
while (next(compressors)) do
-- Create structure.
t = {
["compressors"] = compressors,
["ciphers"] = {good_cipher},
["protocol"] = protocol
}
-- Try connecting with compressor.
record = try_params(host, port, t)
if record == nil then
if protocol_worked then
stdnse.print_debug(2, "%d compressors rejected. (No handshake)", #compressors)
else
stdnse.print_debug(1, "%d compressors and/or protocol %s rejected. (No handshake)", #compressors, protocol)
end
break
elseif record["protocol"] ~= protocol then
stdnse.print_debug(1, "Protocol %s rejected.", protocol)
break
elseif record["type"] == "alert" and record["body"]["description"] == "handshake_failure" then
protocol_worked = true
stdnse.print_debug(2, "%d compressors rejected.", #compressors)
break
elseif record["type"] ~= "handshake" or record["body"]["type"] ~= "server_hello" then
stdnse.print_debug(2, "Unexpected record received.")
break
else
protocol_worked = true
name = record["body"]["compressor"]
stdnse.print_debug(2, "Compressor %s chosen.", name)
remove(compressors, name)
-- Add compressor to the list of accepted compressors.
table.insert(results, name)
if name == "NULL" then
break -- NULL is always last choice, and must be included
end
end
end
return results
end
local function try_protocol(host, port, protocol, upresults)
local ciphers, compressors, results
local condvar = nmap.condvar(upresults)
results = stdnse.output_table()
-- Find all valid ciphers.
ciphers = find_ciphers(host, port, protocol)
if ciphers == nil then
condvar "signal"
return nil
end
if #ciphers == 0 then
results = {ciphers={},compressors={}}
setmetatable(results,{
__tostring=function(t) return "No supported ciphers found" end
})
upresults[protocol] = results
condvar "signal"
return nil
end
-- Find all valid compression methods.
compressors = find_compressors(host, port, protocol, ciphers[1])
-- Add rankings to ciphers
local cipherstr
for i, name in ipairs(ciphers) do
if rankedciphersfilename and rankedciphers[name] then
cipherstr=rankedciphers[name]
else
cipherstr="unknown strength"
end
stdnse.print_debug(2, "Strength of %s rated %d.",cipherstr,cipherstrength[cipherstr])
if mincipherstrength>cipherstrength[cipherstr] then
stdnse.print_debug(2, "Downgrading min cipher strength to %d.",cipherstrength[cipherstr])
mincipherstrength=cipherstrength[cipherstr]
end
local outcipher = {name=name, strength=cipherstr}
setmetatable(outcipher,{
__tostring=function(t) return string.format("%s - %s", t.name, t.strength) end
})
ciphers[i]=outcipher
end
-- Format the cipher table.
table.sort(ciphers, function(a, b) return a["name"] < b["name"] end)
results["ciphers"] = ciphers
-- Format the compressor table.
table.sort(compressors)
results["compressors"] = compressors
upresults[protocol] = results
condvar "signal"
return nil
end
-- Shamelessly stolen from nselib/unpwdb.lua and changed a bit. (Gabriel Lawrence)
local filltable = function(filename,table)
if #table ~= 0 then
return true
end
local file = io.open(filename, "r")
if not file then
return false
end
while true do
local l = file:read()
if not l then
break
end
-- Comments takes up a whole line
if not l:match("#!comment:") then
local lsplit=stdnse.strsplit("%s+", l)
if cipherstrength[lsplit[2]] then
table[lsplit[1]] = lsplit[2]
else
stdnse.print_debug(1,"Strength not defined, ignoring: %s:%s",lsplit[1],lsplit[2])
end
end
end
file:close()
return true
end
portrule = shortport.ssl
--- Return a table that yields elements sorted by key when iterated over with pairs()
-- Should probably put this in a formatting library later.
-- Depends on keys() function defined above.
--@param t The table whose data should be used
--@return out A table that can be passed to pairs() to get sorted results
function sorted_by_key(t)
local out = {}
setmetatable(out, {
__pairs = function(_)
local order = keys(t)
table.sort(order)
return coroutine.wrap(function()
for i,k in ipairs(order) do
coroutine.yield(k, t[k])
end
end)
end
})
return out
end
action = function(host, port)
local name, result, results
rankedciphersfilename=stdnse.get_script_args("ssl-enum-ciphers.rankedcipherlist")
if rankedciphersfilename then
filltable(rankedciphersfilename,rankedciphers)
else
rankedciphersfilename = nmap.fetchfile( "nselib/data/ssl-ciphers" )
stdnse.print_debug(1, "Ranked ciphers filename: %s", rankedciphersfilename)
filltable(rankedciphersfilename,rankedciphers)
end
results = {}
local condvar = nmap.condvar(results)
local threads = {}
for name, _ in pairs(PROTOCOLS) do
stdnse.print_debug(1, "Trying protocol %s.", name)
local co = stdnse.new_thread(try_protocol, host.ip, port.number, name, results)
threads[co] = true
end
repeat
for thread in pairs(threads) do
if coroutine.status(thread) == "dead" then threads[thread] = nil end
end
if ( next(threads) ) then
condvar "wait"
end
until next(threads) == nil
if #( keys(results) ) == 0 then
return nil
end
if rankedciphersfilename then
for k, v in pairs(cipherstrength) do
if v == mincipherstrength then
-- Should sort before or after SSLv3, TLSv*
results["least strength"] = k
end
end
end
return sorted_by_key(results)
end
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