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tls.py
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"""
Extract interesting metadata from TLS connection setup
"""
import dshell.core
from dshell.output.alertout import AlertOutput
import sys
import struct
import binascii
import hashlib
import OpenSSL
import time
try:
import ja3.ja3
ja3_available = True
except ModuleNotFoundError:
ja3_available = False
##################################################################################################
#
# Reference RFC 2246 (TLS Protocol Version 1.0)
# and RFC 3546 (TLS Extensions)
#
# http://www.ietf.org/rfc/rfc2246.txt
# http://www.ietf.org/rfc/rfc3546.txt
# http://www.ietf.org/rfc/rfc3280.txt
#
##################################################################################################
#####################
# Custom Exceptions #
#####################
class Error(Exception):
pass
class InsufficientData(Exception):
pass
class UnsupportedOption(Exception):
pass
####################################
# Constants borrowed from dpkt.ssl #
####################################
# SSLv3/TLS version
SSL3_VERSION = 0x0300
TLS1_VERSION = 0x0301
TLS1_2_VERSION = 0x0303
TLS1_3_VERSION = 0x0304
# Record type
SSL3_RT_CHANGE_CIPHER_SPEC = 20
SSL3_RT_ALERT = 21
SSL3_RT_HANDSHAKE = 22
SSL3_RT_APPLICATION_DATA = 23
# Handshake message type
SSL3_MT_HELLO_REQUEST = 0
SSL3_MT_CLIENT_HELLO = 1
SSL3_MT_SERVER_HELLO = 2
SSL3_MT_CERTIFICATE = 11
SSL3_MT_SERVER_KEY_EXCHANGE = 12
SSL3_MT_CERTIFICATE_REQUEST = 13
SSL3_MT_SERVER_DONE = 14
SSL3_MT_CERTIFICATE_VERIFY = 15
SSL3_MT_CLIENT_KEY_EXCHANGE = 16
SSL3_MT_FINISHED = 20
# SSL/TLS Version Text Strings
tls_version_text = {
0x0300 : 'SSL3',
0x0301 : 'TLS1.0',
0x0303 : 'TLS1.2',
0x0304 : 'TLS1.3'
}
# Cipher Suit Text Strings
ciphersuit_text = {
0x0000: 'TLS_NULL_WITH_NULL_NULL',
0x0001: 'TLS_RSA_WITH_NULL_MD5',
0x0002: 'TLS_RSA_WITH_NULL_SHA',
0x0003: 'TLS_RSA_EXPORT_WITH_RC4_40_MD5',
0x0004: 'TLS_RSA_WITH_RC4_128_MD5',
0x0005: 'TLS_RSA_WITH_RC4_128_SHA',
0x0006: 'TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5',
0x0007: 'TLS_RSA_WITH_IDEA_CBC_SHA',
0x0008: 'TLS_RSA_EXPORT_WITH_DES40_CBC_SHA',
0x0009: 'TLS_RSA_WITH_DES_CBC_SHA',
0x000A: 'TLS_RSA_WITH_3DES_EDE_CBC_SHA',
0x000B: 'TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA',
0x000C: 'TLS_DH_DSS_WITH_DES_CBC_SHA',
0x000D: 'TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA',
0x000E: 'TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA',
0x000F: 'TLS_DH_RSA_WITH_DES_CBC_SHA',
0x0010: 'TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA',
0x0011: 'TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA',
0x0012: 'TLS_DHE_DSS_WITH_DES_CBC_SHA',
0x0013: 'TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA',
0x0014: 'TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA',
0x0015: 'TLS_DHE_RSA_WITH_DES_CBC_SHA',
0x0016: 'TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA',
0x0017: 'TLS_DH_anon_EXPORT_WITH_RC4_40_MD5',
0x0018: 'TLS_DH_anon_WITH_RC4_128_MD5',
0x0019: 'TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA',
0x001A: 'TLS_DH_anon_WITH_DES_CBC_SHA',
0x001B: 'TLS_DH_anon_WITH_3DES_EDE_CBC_SHA',
0x001E: 'TLS_KRB5_WITH_DES_CBC_SHA',
0x001F: 'TLS_KRB5_WITH_3DES_EDE_CBC_SHA',
0x0020: 'TLS_KRB5_WITH_RC4_128_SHA',
0x0021: 'TLS_KRB5_WITH_IDEA_CBC_SHA',
0x0022: 'TLS_KRB5_WITH_DES_CBC_MD5',
0x0023: 'TLS_KRB5_WITH_3DES_EDE_CBC_MD5',
0x0024: 'TLS_KRB5_WITH_RC4_128_MD5',
0x0025: 'TLS_KRB5_WITH_IDEA_CBC_MD5',
0x0026: 'TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA',
0x0027: 'TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA',
0x0028: 'TLS_KRB5_EXPORT_WITH_RC4_40_SHA',
0x0029: 'TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5',
0x002A: 'TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5',
0x002B: 'TLS_KRB5_EXPORT_WITH_RC4_40_MD5',
0x002C: 'TLS_PSK_WITH_NULL_SHA',
0x002D: 'TLS_DHE_PSK_WITH_NULL_SHA',
0x002E: 'TLS_RSA_PSK_WITH_NULL_SHA',
0x002F: 'TLS_RSA_WITH_AES_128_CBC_SHA',
0x0030: 'TLS_DH_DSS_WITH_AES_128_CBC_SHA',
0x0031: 'TLS_DH_RSA_WITH_AES_128_CBC_SHA',
0x0032: 'TLS_DHE_DSS_WITH_AES_128_CBC_SHA',
0x0033: 'TLS_DHE_RSA_WITH_AES_128_CBC_SHA',
0x0034: 'TLS_DH_anon_WITH_AES_128_CBC_SHA',
0x0035: 'TLS_RSA_WITH_AES_256_CBC_SHA',
0x0036: 'TLS_DH_DSS_WITH_AES_256_CBC_SHA',
0x0037: 'TLS_DH_RSA_WITH_AES_256_CBC_SHA',
0x0038: 'TLS_DHE_DSS_WITH_AES_256_CBC_SHA',
0x0039: 'TLS_DHE_RSA_WITH_AES_256_CBC_SHA',
0x003A: 'TLS_DH_anon_WITH_AES_256_CBC_SHA',
0x003B: 'TLS_RSA_WITH_NULL_SHA256',
0x003C: 'TLS_RSA_WITH_AES_128_CBC_SHA256',
0x003D: 'TLS_RSA_WITH_AES_256_CBC_SHA256',
0x003E: 'TLS_DH_DSS_WITH_AES_128_CBC_SHA256',
0x003F: 'TLS_DH_RSA_WITH_AES_128_CBC_SHA256',
0x0040: 'TLS_DHE_DSS_WITH_AES_128_CBC_SHA256',
0x0041: 'TLS_RSA_WITH_CAMELLIA_128_CBC_SHA',
0x0042: 'TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA',
0x0043: 'TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA',
0x0044: 'TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA',
0x0045: 'TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA',
0x0046: 'TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA',
0x0067: 'TLS_DHE_RSA_WITH_AES_128_CBC_SHA256',
0x0068: 'TLS_DH_DSS_WITH_AES_256_CBC_SHA256',
0x0069: 'TLS_DH_RSA_WITH_AES_256_CBC_SHA256',
0x006A: 'TLS_DHE_DSS_WITH_AES_256_CBC_SHA256',
0x006B: 'TLS_DHE_RSA_WITH_AES_256_CBC_SHA256',
0x006C: 'TLS_DH_anon_WITH_AES_128_CBC_SHA256',
0x006D: 'TLS_DH_anon_WITH_AES_256_CBC_SHA256',
0x0084: 'TLS_RSA_WITH_CAMELLIA_256_CBC_SHA',
0x0085: 'TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA',
0x0086: 'TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA',
0x0087: 'TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA',
0x0088: 'TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA',
0x0089: 'TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA',
0x008A: 'TLS_PSK_WITH_RC4_128_SHA',
0x008B: 'TLS_PSK_WITH_3DES_EDE_CBC_SHA',
0x008C: 'TLS_PSK_WITH_AES_128_CBC_SHA',
0x008D: 'TLS_PSK_WITH_AES_256_CBC_SHA',
0x008E: 'TLS_DHE_PSK_WITH_RC4_128_SHA',
0x008F: 'TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA',
0x0090: 'TLS_DHE_PSK_WITH_AES_128_CBC_SHA',
0x0091: 'TLS_DHE_PSK_WITH_AES_256_CBC_SHA',
0x0092: 'TLS_RSA_PSK_WITH_RC4_128_SHA',
0x0093: 'TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA',
0x0094: 'TLS_RSA_PSK_WITH_AES_128_CBC_SHA',
0x0095: 'TLS_RSA_PSK_WITH_AES_256_CBC_SHA',
0x0096: 'TLS_RSA_WITH_SEED_CBC_SHA',
0x0097: 'TLS_DH_DSS_WITH_SEED_CBC_SHA',
0x0098: 'TLS_DH_RSA_WITH_SEED_CBC_SHA',
0x0099: 'TLS_DHE_DSS_WITH_SEED_CBC_SHA',
0x009A: 'TLS_DHE_RSA_WITH_SEED_CBC_SHA',
0x009B: 'TLS_DH_anon_WITH_SEED_CBC_SHA',
0x009C: 'TLS_RSA_WITH_AES_128_GCM_SHA256',
0x009D: 'TLS_RSA_WITH_AES_256_GCM_SHA384',
0x009E: 'TLS_DHE_RSA_WITH_AES_128_GCM_SHA256',
0x009F: 'TLS_DHE_RSA_WITH_AES_256_GCM_SHA384',
0x00A0: 'TLS_DH_RSA_WITH_AES_128_GCM_SHA256',
0x00A1: 'TLS_DH_RSA_WITH_AES_256_GCM_SHA384',
0x00A2: 'TLS_DHE_DSS_WITH_AES_128_GCM_SHA256',
0x00A3: 'TLS_DHE_DSS_WITH_AES_256_GCM_SHA384',
0x00A4: 'TLS_DH_DSS_WITH_AES_128_GCM_SHA256',
0x00A5: 'TLS_DH_DSS_WITH_AES_256_GCM_SHA384',
0x00A6: 'TLS_DH_anon_WITH_AES_128_GCM_SHA256',
0x00A7: 'TLS_DH_anon_WITH_AES_256_GCM_SHA384',
0x00A8: 'TLS_PSK_WITH_AES_128_GCM_SHA256',
0x00A9: 'TLS_PSK_WITH_AES_256_GCM_SHA384',
0x00AA: 'TLS_DHE_PSK_WITH_AES_128_GCM_SHA256',
0x00AB: 'TLS_DHE_PSK_WITH_AES_256_GCM_SHA384',
0x00AC: 'TLS_RSA_PSK_WITH_AES_128_GCM_SHA256',
0x00AD: 'TLS_RSA_PSK_WITH_AES_256_GCM_SHA384',
0x00AE: 'TLS_PSK_WITH_AES_128_CBC_SHA256',
0x00AF: 'TLS_PSK_WITH_AES_256_CBC_SHA384',
0x00B0: 'TLS_PSK_WITH_NULL_SHA256',
0x00B1: 'TLS_PSK_WITH_NULL_SHA384',
0x00B2: 'TLS_DHE_PSK_WITH_AES_128_CBC_SHA256',
0x00B3: 'TLS_DHE_PSK_WITH_AES_256_CBC_SHA384',
0x00B4: 'TLS_DHE_PSK_WITH_NULL_SHA256',
0x00B5: 'TLS_DHE_PSK_WITH_NULL_SHA384',
0x00B6: 'TLS_RSA_PSK_WITH_AES_128_CBC_SHA256',
0x00B7: 'TLS_RSA_PSK_WITH_AES_256_CBC_SHA384',
0x00B8: 'TLS_RSA_PSK_WITH_NULL_SHA256',
0x00B9: 'TLS_RSA_PSK_WITH_NULL_SHA384',
0x00BA: 'TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256',
0x00BB: 'TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256',
0x00BC: 'TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256',
0x00BD: 'TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256',
0x00BE: 'TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256',
0x00BF: 'TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256',
0x00C0: 'TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256',
0x00C1: 'TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256',
0x00C2: 'TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256',
0x00C3: 'TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256',
0x00C4: 'TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256',
0x00C5: 'TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256',
0x00FF: 'TLS_EMPTY_RENEGOTIATION_INFO_SCSV',
0xC001: 'TLS_ECDH_ECDSA_WITH_NULL_SHA',
0xC002: 'TLS_ECDH_ECDSA_WITH_RC4_128_SHA',
0xC003: 'TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA',
0xC004: 'TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA',
0xC005: 'TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA',
0xC006: 'TLS_ECDHE_ECDSA_WITH_NULL_SHA',
0xC007: 'TLS_ECDHE_ECDSA_WITH_RC4_128_SHA',
0xC008: 'TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA',
0xC009: 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA',
0xC00A: 'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA',
0xC00B: 'TLS_ECDH_RSA_WITH_NULL_SHA',
0xC00C: 'TLS_ECDH_RSA_WITH_RC4_128_SHA',
0xC00D: 'TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA',
0xC00E: 'TLS_ECDH_RSA_WITH_AES_128_CBC_SHA',
0xC00F: 'TLS_ECDH_RSA_WITH_AES_256_CBC_SHA',
0xC010: 'TLS_ECDHE_RSA_WITH_NULL_SHA',
0xC011: 'TLS_ECDHE_RSA_WITH_RC4_128_SHA',
0xC012: 'TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA',
0xC013: 'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA',
0xC014: 'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA',
0xC015: 'TLS_ECDH_anon_WITH_NULL_SHA',
0xC016: 'TLS_ECDH_anon_WITH_RC4_128_SHA',
0xC017: 'TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA',
0xC018: 'TLS_ECDH_anon_WITH_AES_128_CBC_SHA',
0xC019: 'TLS_ECDH_anon_WITH_AES_256_CBC_SHA',
0xC01A: 'TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA',
0xC01B: 'TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA',
0xC01C: 'TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA',
0xC01D: 'TLS_SRP_SHA_WITH_AES_128_CBC_SHA',
0xC01E: 'TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA',
0xC01F: 'TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA',
0xC020: 'TLS_SRP_SHA_WITH_AES_256_CBC_SHA',
0xC021: 'TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA',
0xC022: 'TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA',
0xC023: 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256',
0xC024: 'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384',
0xC025: 'TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256',
0xC026: 'TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384',
0xC027: 'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256',
0xC028: 'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384',
0xC029: 'TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256',
0xC02A: 'TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384',
0xC02B: 'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256',
0xC02C: 'TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384',
0xC02D: 'TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256',
0xC02E: 'TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384',
0xC02F: 'TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256',
0xC030: 'TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384',
0xC031: 'TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256',
0xC032: 'TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384',
0xC033: 'TLS_ECDHE_PSK_WITH_RC4_128_SHA',
0xC034: 'TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA',
0xC035: 'TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA',
0xC036: 'TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA',
0xC037: 'TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256',
0xC038: 'TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384',
0xC039: 'TLS_ECDHE_PSK_WITH_NULL_SHA',
0xC03A: 'TLS_ECDHE_PSK_WITH_NULL_SHA256',
0xC03B: 'TLS_ECDHE_PSK_WITH_NULL_SHA384',
0xC03C: 'TLS_RSA_WITH_ARIA_128_CBC_SHA256',
0xC03D: 'TLS_RSA_WITH_ARIA_256_CBC_SHA384',
0xC03E: 'TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256',
0xC03F: 'TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384',
0xC040: 'TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256',
0xC041: 'TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384',
0xC042: 'TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256',
0xC043: 'TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384',
0xC044: 'TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256',
0xC045: 'TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384',
0xC046: 'TLS_DH_anon_WITH_ARIA_128_CBC_SHA256',
0xC047: 'TLS_DH_anon_WITH_ARIA_256_CBC_SHA384',
0xC048: 'TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256',
0xC049: 'TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384',
0xC04A: 'TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256',
0xC04B: 'TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384',
0xC04C: 'TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256',
0xC04D: 'TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384',
0xC04E: 'TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256',
0xC04F: 'TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384',
0xC050: 'TLS_RSA_WITH_ARIA_128_GCM_SHA256',
0xC051: 'TLS_RSA_WITH_ARIA_256_GCM_SHA384',
0xC052: 'TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256',
0xC053: 'TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384',
0xC054: 'TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256',
0xC055: 'TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384',
0xC056: 'TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256',
0xC057: 'TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384',
0xC058: 'TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256',
0xC059: 'TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384',
0xC05A: 'TLS_DH_anon_WITH_ARIA_128_GCM_SHA256',
0xC05B: 'TLS_DH_anon_WITH_ARIA_256_GCM_SHA384',
0xC05C: 'TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256',
0xC05D: 'TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384',
0xC05E: 'TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256',
0xC05F: 'TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384',
0xC060: 'TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256',
0xC061: 'TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384',
0xC062: 'TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256',
0xC063: 'TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384',
0xC064: 'TLS_PSK_WITH_ARIA_128_CBC_SHA256',
0xC065: 'TLS_PSK_WITH_ARIA_256_CBC_SHA384',
0xC066: 'TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256',
0xC067: 'TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384',
0xC068: 'TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256',
0xC069: 'TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384',
0xC06A: 'TLS_PSK_WITH_ARIA_128_GCM_SHA256',
0xC06B: 'TLS_PSK_WITH_ARIA_256_GCM_SHA384',
0xC06C: 'TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256',
0xC06D: 'TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384',
0xC06E: 'TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256',
0xC06F: 'TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384',
0xC070: 'TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256',
0xC071: 'TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384',
0xC072: 'TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256',
0xC073: 'TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384',
0xC074: 'TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256',
0xC075: 'TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384',
0xC076: 'TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256',
0xC077: 'TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384',
0xC078: 'TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256',
0xC079: 'TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384',
0xC07A: 'TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256',
0xC07B: 'TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384',
0xC07C: 'TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256',
0xC07D: 'TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384',
0xC07E: 'TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256',
0xC07F: 'TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384',
0xC080: 'TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256',
0xC081: 'TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384',
0xC082: 'TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256',
0xC083: 'TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384',
0xC084: 'TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256',
0xC085: 'TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384',
0xC086: 'TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256',
0xC087: 'TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384',
0xC088: 'TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256',
0xC089: 'TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384',
0xC08A: 'TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256',
0xC08B: 'TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384',
0xC08C: 'TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256',
0xC08D: 'TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384',
0xC08E: 'TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256',
0xC08F: 'TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384',
0xC090: 'TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256',
0xC091: 'TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384',
0xC092: 'TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256',
0xC093: 'TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384',
0xC094: 'TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256',
0xC095: 'TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384',
0xC096: 'TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256',
0xC097: 'TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384',
0xC098: 'TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256',
0xC099: 'TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384',
0xC09A: 'TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256',
0xC09B: 'TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384',
0xC09C: 'TLS_RSA_WITH_AES_128_CCM',
0xC09D: 'TLS_RSA_WITH_AES_256_CCM',
0xC09E: 'TLS_DHE_RSA_WITH_AES_128_CCM',
0xC09F: 'TLS_DHE_RSA_WITH_AES_256_CCM',
0xC0A0: 'TLS_RSA_WITH_AES_128_CCM_8',
0xC0A1: 'TLS_RSA_WITH_AES_256_CCM_8',
0xC0A2: 'TLS_DHE_RSA_WITH_AES_128_CCM_8',
0xC0A3: 'TLS_DHE_RSA_WITH_AES_256_CCM_8',
0xC0A4: 'TLS_PSK_WITH_AES_128_CCM',
0xC0A5: 'TLS_PSK_WITH_AES_256_CCM',
0xC0A6: 'TLS_DHE_PSK_WITH_AES_128_CCM',
0xC0A7: 'TLS_DHE_PSK_WITH_AES_256_CCM',
0xC0A8: 'TLS_PSK_WITH_AES_128_CCM_8',
0xC0A9: 'TLS_PSK_WITH_AES_256_CCM_8',
0xC0AA: 'TLS_PSK_DHE_WITH_AES_128_CCM_8',
0xC0AB: 'TLS_PSK_DHE_WITH_AES_256_CCM_8',
}
keytypes = {
OpenSSL.crypto.TYPE_RSA: 'RSA',
OpenSSL.crypto.TYPE_DSA: 'DSA',
}
#####################################################################
# TLS - TLS message object, initialized from TCP segment
#
# Status: Currently only supports TLS 1.0 Handshake messages
#
#####################################################################
class TLS(object):
def __init__(self, data):
data_length = len(data)
offset = 0
#########################
# Unpack TLSPlaintext #
#########################
if data_length >= offset+5:
(self.ContentType, self.ProtocolVersion, self.TLSRecordLength) = struct.unpack(
'!BHH', data[offset:offset+5])
offset += 5
else:
raise InsufficientData('%d bytes received by TLS' % data_length)
#
# For now, only interested in TLS 1.0.
# Reason: SSL2.0 records do not support the server_name extension, which is the primary
# motivation for creating this library. Needs to be updated/extended eventually.
#
if self.ProtocolVersion != TLS1_VERSION and self.ProtocolVersion != SSL3_VERSION and self.ProtocolVersion != TLS1_2_VERSION:
raise UnsupportedOption(
'Protocol version 0x%x not supported' % self.ProtocolVersion)
#################
# Check Size #
#################
self.recordbytes = self.TLSRecordLength + 5
if data_length < self.recordbytes:
raise InsufficientData('%d bytes received by TLS' % data_length)
#########################################################################
# Content Types - Only Handshake supported for now
#########################################################################
self.Handshakes = []
if self.ContentType == SSL3_RT_HANDSHAKE:
###############################
# Loop Through Handshakes #
###############################
while self.recordbytes >= offset + 4: # Need minimum four bytes for the rest to contain another Handshake
HandshakeType = data[offset]
offset += 1
#
# Handshake Record length
#
HandshakeLength = struct.unpack(
'!I', b'\x00' + data[offset:offset+3])[0]
offset += 3
#
# Parse Handshake SubType
#
if HandshakeType == SSL3_MT_CLIENT_HELLO:
try:
self.Handshakes.append(TLSClientHello(
HandshakeType, HandshakeLength, data[offset:offset+HandshakeLength]))
except:
raise
elif HandshakeType == SSL3_MT_SERVER_HELLO:
try:
self.Handshakes.append(TLSServerHello(
HandshakeType, HandshakeLength, data[offset:offset+HandshakeLength]))
except:
raise
elif HandshakeType == SSL3_MT_CERTIFICATE:
try:
self.Handshakes.append(TLSCertificate(
HandshakeType, HandshakeLength, data[offset:offset+HandshakeLength]))
except:
raise
offset += HandshakeLength
###############################
# End Handshakes Loop #
###############################
#####################################################################
# TLSHandshake
#####################################################################
class TLSHandshake(object):
def __init__(self, HandshakeType, HandshakeLength):
self.HandshakeType = HandshakeType
self.HandshakeLength = HandshakeLength
#####################################################################
# TLSCertificate - Certificate Handshake type
#####################################################################
class TLSCertificate(TLSHandshake):
def __init__(self, HandshakeType, HandshakeLength, data):
TLSHandshake.__init__(self, HandshakeType, HandshakeLength)
data_length = len(data)
offset = 0
# length of all certificates
if data_length >= offset+3:
certificates_length = struct.unpack(
'!I', b'\x00' + data[offset:offset+3])[0]
offset += 3
else:
raise InsufficientData(
'%d bytes received by TLSCertificate, expected %d for client_version' % (data_length, offset + 2))
if data_length >= offset + certificates_length:
try:
self.Certificates = self.__parse_certs(
data[offset:offset+certificates_length])
offset += certificates_length
except:
offset += certificates_length
raise
else:
raise InsufficientData('%d bytes received by TLSCertificate, expected %d for client_version' % (
data_length, offset + certificates_length))
# Returns array of x509 objects (defined below)
def __parse_certs(self, data):
certs = []
while data:
try:
clen, data = self.l24(data)
if len(data) < clen:
raise InsufficientData(
'%d bytes in buffer, need %d' % (len(data), clen))
try:
cert = OpenSSL.crypto.load_certificate(
OpenSSL.crypto.FILETYPE_ASN1, data[:clen])
except:
return certs
certs.append(cert)
data = data[clen:]
except:
raise
return certs
def l24(self, data):
'''24-bit length decoder'''
(lh, ll), data = struct.unpack('!BH', data[0:3]), data[3:]
return lh << 16 | ll, data
#####################################################################
# TLSClientHello - ClientHello Handshake type
#####################################################################
class TLSClientHello(TLSHandshake):
def __init__(self, HandshakeType, HandshakeLength, data):
global ja3_available
TLSHandshake.__init__(self, HandshakeType, HandshakeLength)
data_length = len(data)
offset = 0
self.ja3_data = []
# self.client_version
if data_length >= offset+2:
self.client_version = struct.unpack('!H', data[offset:offset+2])[0]
if ja3_available:
self.ja3_data.append(self.client_version)
offset += 2
else:
raise InsufficientData(
'%d bytes received by TLSClientHello, expected %d for client_version' % (data_length, offset + 2))
# self.random
if data_length >= offset+32:
self.random = data[offset:offset+32]
offset += 32
else:
raise InsufficientData('%d bytes received by TLSClientHello, expected %d for random block' % (
data_length, offset + 32))
# self.session_id_length
if data_length >= offset+1:
self.session_id_length = struct.unpack(
'!B', data[offset:offset+1])[0]
offset += 1
else:
raise InsufficientData(
'%d bytes received by TLSClientHello, expected %d for session_id_length' % (data_length, offset + 1))
# self.session_id
if self.session_id_length > 0:
if data_length >= offset+self.session_id_length:
self.session_id = data[offset:offset+self.session_id_length]
offset += self.session_id_length
else:
raise InsufficientData('%d bytes received by TLSClientHello, expected %d for session_id' % (
data_length, offset + self.session_id_length))
else:
self.session_id = None
# self.cipher_suites_length
if data_length >= offset+2:
self.cipher_suites_length = struct.unpack(
'!H', data[offset:offset+2])[0]
offset += 2
else:
raise InsufficientData(
'%d bytes received by TLSClientHello, expected %d for cipher_suites_length' % (data_length, offset + 2))
# self.cipher_suites (array, two bytes each)
self.cipher_suites = []
if self.cipher_suites_length > 0:
if ja3_available:
self.ja3_data.append(ja3.ja3.convert_to_ja3_segment(
data[offset:offset+self.cipher_suites_length], 2))
if data_length >= offset + self.cipher_suites_length:
for j in range(0, self.cipher_suites_length, 2):
self.cipher_suites.append(data[offset+j:offset+j+2])
offset += self.cipher_suites_length
else:
raise InsufficientData('%d bytes received by TLSClientHello, expected %d for cipher_suites' % (
data_length, offset + self.cipher_suites_length))
# self.compression_methods_length
if data_length >= offset+1:
self.compression_methods_length = data[offset]
offset += 1
else:
raise InsufficientData(
'%d bytes received by TLSClientHello, expected %d for compression_methods_length' % (data_length, offset + 1))
# self.compression_methods (array, one bytes each)
self.compression_methods = []
if self.compression_methods_length > 0:
if data_length >= offset + self.compression_methods_length:
for j in range(0, self.compression_methods_length):
self.compression_methods.append(data[offset+j])
offset += self.compression_methods_length
else:
raise InsufficientData('%d bytes received by TLSClientHello, expected %d for compression_methods' % (
data_length, offset + self.compression_methods_length))
################################
# Slice Off the Extensions
################################
if ja3_available:
try:
self.ja3_data.extend(ja3.ja3.process_extensions(
ja3.ja3.dpkt.ssl.TLSClientHello(data)))
except ja3.ja3.dpkt.ssl.SSL3Exception:
self.debug("Error enumerating extensions for ja3")
self.extensions = {}
self.raw_extensions = [] # ordered list of tuples (ex_type, ex_data)
# self.extensions_length
if data_length >= offset+2:
self.extensions_length = struct.unpack(
'!H', data[offset:offset+2])[0]
offset += 2
else:
# No extensions
return
# Copy Extension Blob into a new working variable
try:
extensions_data = data[offset:offset+self.extensions_length]
except:
raise InsufficientData('%d bytes received by TLSClientHello, expected %d for extensions' % (
data_length, offset + self.extensions_length))
parse_tls_extensions(self, extensions_data)
def ja3(self):
if ja3_available:
return ','.join([str(x) for x in self.ja3_data])
else:
return None
def ja3_digest(self):
if ja3_available:
h = hashlib.md5(self.ja3().encode('utf-8'))
return h.hexdigest()
else:
return None
#####################################################################
# TLSServerHello - ServerHello Handshake type
#####################################################################
class TLSServerHello(TLSHandshake):
def __init__(self, HandshakeType, HandshakeLength, data):
TLSHandshake.__init__(self, HandshakeType, HandshakeLength)
data_length = len(data)
offset = 0
# self.server_version
if data_length >= offset+2:
self.server_version = struct.unpack('!H', data[offset:offset+2])[0]
offset += 2
else:
raise InsufficientData(
'%d bytes received by TLSServerHello, expected %d for server_version' % (data_length, offset + 2))
# self.random
if data_length >= offset+32:
self.random = data[offset:offset+32]
offset += 32
else:
raise InsufficientData('%d bytes received by TLSServerHello, expected %d for random block' % (
data_length, offset + 32))
# self.session_id_length
if data_length >= offset+1:
self.session_id_length = struct.unpack(
'!B', data[offset:offset+1])[0]
offset += 1
else:
raise InsufficientData(
'%d bytes received by TLSServerHello, expected %d for session_id_length' % (data_length, offset + 1))
# self.session_id
if self.session_id_length > 0:
if data_length >= offset+self.session_id_length:
self.session_id = data[offset:offset+self.session_id_length]
offset += self.session_id_length
else:
raise InsufficientData('%d bytes received by TLSServerHello, expected %d for session_id' % (
data_length, offset + self.session_id_length))
else:
self.session_id = None
# self.cipher_suite (single value, two bytes)
if data_length >= offset + 2:
self.cipher_suite = data[offset:offset+2]
offset += 2
else:
self.cipher_suite = None
raise InsufficientData(
'%d bytes received by TLSServerHello, expected %d for cipher_suite' % (data_length, offset + 2))
# self.compression_method (single value, one byte)
if data_length >= offset + 1:
self.compression_method = data[offset]
offset += 1
else:
raise InsufficientData(
'%d bytes received by TLSServerHello, expected %d for compression_method' % (data_length, offset + 1))
################################
# TLS Extensions
################################
self.extensions = {}
self.raw_extensions = [] # ordered list of tuples (ex_type, ex_data)
# self.extensions_length
if data_length >= offset+2:
self.extensions_length = struct.unpack(
'!H', data[offset:offset+2])[0]
offset += 2
else:
# No extensions
return
# Copy Extension Blob into a new working variable
try:
extensions_data = data[offset:offset+self.extensions_length]
except:
raise InsufficientData('%d bytes received by TLSServerHello, expected %d for extensions' % (
data_length, offset + self.extensions_length))
parse_tls_extensions(self, extensions_data)
##############################################################################
# Some Utility Functions
##############################################################################
def parse_tls_extensions(helloObj, extensions_data):
###########################
# Iterate the Extensions
###########################
extension_server_name_list = []
extension_supported_versions_list = []
while len(extensions_data) >= 4:
(ex_type, length) = struct.unpack('!HH', extensions_data[:4])
if len(extensions_data) > length+4:
this_extension_data = extensions_data[4:4+length]
extensions_data = extensions_data[4+length:]
else:
this_extension_data = extensions_data[4:]
extensions_data = ''
helloObj.raw_extensions.append((ex_type, this_extension_data))
# server_name extension
# this_extension_data is defined on page 8 of RFC 3546
# It is essentially a list of hostnames
if len(this_extension_data) > 2 and ex_type == 0:
server_name_list_length = struct.unpack(
'!H', this_extension_data[:2])[0]
if server_name_list_length > len(this_extension_data) - 2:
raise Error("Malformed ServerNameList")
server_name_list = this_extension_data[2:]
# Iterate the list
while len(server_name_list) > 0:
(name_type, name_length) = struct.unpack(
'!BH', server_name_list[0:3])
name_data = server_name_list[3:name_length + 3]
if len(server_name_list) > name_length + 3:
server_name_list = server_name_list[name_length + 3:]
else:
server_name_list = ''
if name_type == 0:
extension_server_name_list.append(name_data)
else:
raise UnsupportedOption("Unknown NameType")
# supported_versions extension
elif ex_type == 43:
if length == 2:
extension_supported_versions_list.append(struct.unpack('!H', this_extension_data[0:2])[0])
continue
supported_versions_length = this_extension_data[0]
# Iterate the list
for offset in range(0,supported_versions_length,2):
extension_supported_versions_list.append(struct.unpack('!H', this_extension_data[offset+1:offset+3])[0])
# After Loop
# add extension information to dictionary
if len(extension_server_name_list):
helloObj.extensions['server_name'] = extension_server_name_list
if len(extension_supported_versions_list):
helloObj.extensions['supported_versions'] = extension_supported_versions_list
def keyTypeToString(kt):
global keytypes
if kt in keytypes:
return keytypes[kt]
else:
try:
return "UNKNOWN(%s)" % str(kt)
except:
return "UNKNOWN(%s)" % repr(kt)
def parse_x509_dtm(dtm):
if type(dtm) == bytes:
dtm = dtm.decode('utf-8')
# Fmt: YYYYMMDDhhmmssZ
t = time.strptime(dtm, '%Y%m%d%H%M%SZ')
return time.strftime('%Y-%m-%d %H:%M:%S', t)
def render_x509_object(n):
output = b''
for component in n.get_components():
output += b"%s=%s " % component
return output.rstrip().decode('utf-8')
def openSSL_cert_to_info_dictionary(c):
d = {'fingerprints': {}}
for h in ('md5', 'sha1', 'sha256'):
d['fingerprints'][h] = c.digest(h).decode('utf-8')
d['subject'] = render_x509_object(c.get_subject())
d['subject_cn'] = c.get_subject().CN
d['issuer'] = render_x509_object(c.get_issuer())
d['notAfter'] = parse_x509_dtm(c.get_notAfter())
d['notBefore'] = parse_x509_dtm(c.get_notBefore())
#
# Look for subjectAltName
#
for i in range(0, c.get_extension_count()):
ext = c.get_extension(i)
if ext.get_short_name() == b'subjectAltName':
d['subjectAltName'] = str(ext)
public_key = c.get_pubkey()
d['pubkey_bits'] = public_key.bits()
d['pubkey_type'] = keyTypeToString(public_key.type())
d['pubkey_sha1'] = hashlib.sha1(OpenSSL.crypto.dump_publickey(
OpenSSL.crypto.FILETYPE_ASN1, public_key)).hexdigest()
return d
def split_subjectAltName_string(subjectAltName):
l = []
for an in subjectAltName.split(', '):
if an.startswith('DNS:'):
an = an[4:]
l.append(an)
return l
class DshellPlugin(dshell.core.ConnectionPlugin):
def __init__(self):
super().__init__(
name="tls",
author="amm",
description="Extract interesting metadata from TLS connection setup",
bpf="tcp and (port 443 or port 993 or port 25 or port 587 or port 465 or port 5269 or port 995 or port 3389)",
output=AlertOutput(label=__name__),
longdescription="""
Extract interesting metadata from TLS connection setup, including the ClientHello and Certificate handshake structures.
For JA3 support (ClientHello hash), install module pyja3
"""
)
def premodule(self):
if not ja3_available:
self.debug("ja3 capability disabled due to missing python module")
def connection_handler(self, conn):
inverted_ssl = False
info = conn.info()
client_names = set() # Agregate list of names specified by client
server_names = set() # Agregate list of names specified by server
certs_cs = []
certs_sc = []
server_cipher = None
client_cipher_list = []
tls_version = 0
for blob in conn.blobs:
blob.reassemble(allow_overlap=True, allow_padding=True)
data = blob.data
offset = 0
while offset < len(data):
tlsrecord = None
try:
tlsrecord = TLS(data[offset:])
offset += tlsrecord.recordbytes
if tlsrecord.ProtocolVersion > tls_version:
tls_version = tlsrecord.ProtocolVersion
if tlsrecord.ContentType == SSL3_RT_HANDSHAKE:
for hs in tlsrecord.Handshakes:
#
# Client hello. Looking for inversion.
#
if hs.HandshakeType == SSL3_MT_CLIENT_HELLO:
if blob.direction != 'cs':
inverted_ssl = True
if 'server_name' in hs.extensions:
for server in hs.extensions['server_name']:
client_names.add(
server.decode('utf-8'))
if 'supported_versions' in hs.extensions:
if 'supported_versions' not in info:
info['supported_versions'] = {}
info['supported_versions']['client'] = hs.extensions['supported_versions']
if ja3_available:
info['ja3'] = hs.ja3()
info['ja3_digest'] = hs.ja3_digest()
client_cipher_list = hs.cipher_suites
elif hs.HandshakeType == SSL3_MT_SERVER_HELLO:
server_cipher = hs.cipher_suite
if blob.direction != 'sc':
inverted_ssl = True
if 'supported_versions' in hs.extensions:
if 'supported_versions' not in info:
info['supported_versions'] = {}
info['supported_versions']['server'] = hs.extensions['supported_versions']
#
# Certificate. Looking for first server cert.
#
elif hs.HandshakeType == SSL3_MT_CERTIFICATE:
for cert in hs.Certificates:
cert_info = openSSL_cert_to_info_dictionary(
cert)
if blob.direction == 'cs':
certs_cs.append(cert_info)
else:
certs_sc.append(cert_info)
except InsufficientData:
self.log('Skipping small blob: %s\n' % (sys.exc_info()[1]))