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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, ["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