mirror of
https://github.com/vel21ripn/nDPI.git
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5f312c0cd6
* Fix JA4 ALPN fingerprint to use first and last characters According to the JA4 specification (line 2139), the ALPN field should contain the first and last characters of the first ALPN extension value. Currently, nDPI uses the first and second characters (alpn[0] and alpn[1]), which produces incorrect fingerprints that don't match other JA4 implementations like Wireshark. For example, with ALPN 'http/1.1': - Current (incorrect): 'ht' (first + second char) - Fixed (correct): 'h1' (first + last char) This change ensures nDPI's JA4 implementation conforms to the official specification and maintains interoperability with other JA4 tools. Fixes: Incorrect JA4 ALPN fingerprint generation * Fix JA4 ALPN implementation to correctly parse first ALPN protocol The previous fix attempted to use strlen(ja->client.alpn)-1 but this was insufficient because nDPI modifies the ALPN string by: 1. Adding null terminators that truncate the last character 2. Converting semicolons to dashes, affecting multi-protocol ALPNs This complete fix: - Adds alpn_original_last field to store the true last character - Captures the last character of the FIRST ALPN protocol only (before ;/,) - Preserves the original character before nDPI's string modifications Now correctly implements JA4 spec: first + last characters of first ALPN protocol Examples: - ALPN 'h2;http/1.1' -> 'h2' (not 'h.' or 'h1') - ALPN 'http/1.1' -> 'h1' (not 'ht' or 'h.') Fixes: #2914 * Fix JA4 SNI detection to properly handle missing SNI extensions Previously, nDPI incorrectly set JA4 SNI flag to 'd' (domain present) for flows without any SNI extension. This was because the logic only checked for NDPI_NUMERIC_IP_HOST risk (set when SNI contains IP) but didn't distinguish between missing SNI and domain SNI. Now properly detects: - No SNI extension → 'i' flag - SNI with IP address → 'i' flag - SNI with domain → 'd' flag This matches the JA4 specification.
49 lines
7.6 KiB
Text
49 lines
7.6 KiB
Text
DPI Packets (TCP): 34 (6.80 pkts/flow)
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DPI Packets (UDP): 4 (2.00 pkts/flow)
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Confidence DPI : 7 (flows)
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Num dissector calls: 15 (2.14 diss/flow)
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LRU cache ookla: 0/0/0 (insert/search/found)
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LRU cache bittorrent: 0/0/0 (insert/search/found)
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LRU cache stun: 0/0/0 (insert/search/found)
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LRU cache tls_cert: 3/6/0 (insert/search/found)
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LRU cache mining: 0/0/0 (insert/search/found)
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LRU cache msteams: 0/0/0 (insert/search/found)
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LRU cache fpc_dns: 2/4/0 (insert/search/found)
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Automa host: 4/4 (search/found)
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Automa domain: 4/0 (search/found)
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Automa tls cert: 3/3 (search/found)
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Automa risk mask: 0/0 (search/found)
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Automa common alpns: 1/0 (search/found)
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Patricia risk mask: 8/0 (search/found)
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Patricia risk mask IPv6: 0/0 (search/found)
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Patricia risk: 0/0 (search/found)
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Patricia risk IPv6: 0/0 (search/found)
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Patricia protocols: 12/2 (search/found)
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Patricia protocols IPv6: 0/0 (search/found)
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DNS 4 392 2
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TLS 20 1717 1
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AnyDesk 150 44008 4
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Safe 20 1717 1
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Acceptable 154 44400 6
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Web 20 1717 1
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RemoteAccess 150 44008 4
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Network 4 392 2
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JA Host Stats:
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IP Address # JA4C
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1 192.168.1.178 1
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2 192.168.1.187 1
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3 192.168.1.128 1
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4 192.168.149.129 1
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1 TCP 192.168.149.129:43535 <-> 51.83.238.219:80 [proto: 91.252/TLS.AnyDesk][IP: 252/AnyDesk][Encrypted][Confidence: DPI][FPC: 252/AnyDesk, Confidence: IP address][DPI packets: 8][cat: RemoteAccess/12][19 pkts/6843 bytes <-> 22 pkts/9152 bytes][Goodput ratio: 85/86][10.60 sec][bytes ratio: -0.144 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 624/488 7028/7028 1803/1610][Pkt Len c2s/s2c min/avg/max/stddev: 54/60 360/416 1514/1514 525/549][Risk: ** Known Proto on Non Std Port **** TLS (probably) Not Carrying HTTPS **** Missing SNI TLS Extn **** Desktop/File Sharing **][Risk Score: 120][Risk Info: Found AnyDesk / SNI should always be present / No ALPN / Expected on port 443][TCP Fingerprint: 2_64_64240_2e3cee914fc1/Linux][TLSv1.2][JA4: t12i640500_9197985d2161_a1e935682795][JA3S: 107030a763c7224285717ff1569a17f3][Issuer: CN=AnyNet Root CA, O=philandro Software GmbH, C=DE][Subject: C=DE, O=philandro Software GmbH, CN=AnyNet Relay][Certificate SHA-1: 9E:08:D2:58:A9:02:CD:4F:E2:4A:26:B8:48:5C:43:0B:81:29:99:E3][Firefox][Validity: 2018-11-18 02:14:23 - 2028-11-15 02:14:23][Cipher: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384][Plen Bins: 4,13,13,9,9,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,4,4,0,4,0,0,9,0,0,0,0,18,0,0]
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2 TCP 192.168.1.128:48260 <-> 195.181.174.176:443 [proto: 91.252/TLS.AnyDesk][IP: 0/Unknown][Encrypted][Confidence: DPI][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 8][cat: RemoteAccess/12][27 pkts/7693 bytes <-> 27 pkts/4853 bytes][Goodput ratio: 77/63][58.81 sec][(Advertised) ALPNs: anydesk/6.2.0/linux][bytes ratio: 0.226 (Upload)][IAT c2s/s2c min/avg/max/stddev: 0/0 2284/1898 10210/10228 4074/3857][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 285/180 1514/1514 460/331][Risk: ** Missing SNI TLS Extn **** Desktop/File Sharing **** Uncommon TLS ALPN **][Risk Score: 110][Risk Info: anydesk/6.2.0/linu / Found AnyDesk / SNI should always be present][TCP Fingerprint: 2_64_64240_2e3cee914fc1/Linux][TLSv1.2][JA4: t12i6406ax_9197985d2161_a1e935682795][JA3S: e58f0b3c1e9eefb8ee4f92aeceee5858][Issuer: CN=AnyNet Root CA, O=philandro Software GmbH, C=DE][Subject: C=DE, O=philandro Software GmbH, CN=AnyNet Relay][Certificate SHA-1: 9E:08:D2:58:A9:02:CD:4F:E2:4A:26:B8:48:5C:43:0B:81:29:99:E3][Firefox][Validity: 2018-11-18 02:14:23 - 2028-11-15 02:14:23][Cipher: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384][Plen Bins: 0,35,20,0,10,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,5,0,0,0,5,0,0,0,0,0,0,15,0,0]
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3 TCP 192.168.1.187:54164 <-> 192.168.1.178:7070 [proto: 91.252/TLS.AnyDesk][IP: 0/Unknown][Encrypted][Confidence: DPI][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 7][cat: RemoteAccess/12][19 pkts/7324 bytes <-> 21 pkts/3951 bytes][Goodput ratio: 86/69][7.29 sec][bytes ratio: 0.299 (Upload)][IAT c2s/s2c min/avg/max/stddev: 0/0 481/137 2966/1753 831/422][Pkt Len c2s/s2c min/avg/max/stddev: 54/60 385/188 3980/1514 894/354][Risk: ** Known Proto on Non Std Port **** TLS (probably) Not Carrying HTTPS **** Missing SNI TLS Extn **** Desktop/File Sharing **][Risk Score: 120][Risk Info: Found AnyDesk / SNI should always be present / No ALPN / Expected on port 443][TCP Fingerprint: 2_128_64240_6bb88f5575fd/Windows][TLSv1.2][JA4: t12i550500_168bb377f8c8_a1e935682795][JA3S: ee644a8a34c434abca4b737ec1d9efad][Subject: CN=AnyDesk Client, CN=AnyDesk Client][Certificate SHA-1: F8:4E:27:4E:F9:33:35:2F:1A:69:71:D5:02:6B:B8:72:EF:B7:BA:B0][Firefox][Cipher: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 0,45,15,5,5,0,0,5,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,5,0,5]
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4 TCP 192.168.1.178:52039 <-> 192.168.1.187:7070 [proto: 91.252/TLS.AnyDesk][IP: 0/Unknown][Encrypted][Confidence: DPI][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 6][cat: RemoteAccess/12][8 pkts/2035 bytes <-> 7 pkts/2157 bytes][Goodput ratio: 76/82][0.56 sec][bytes ratio: -0.029 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 92/40 406/85 150/33][Pkt Len c2s/s2c min/avg/max/stddev: 60/54 254/308 1340/968 419/387][Risk: ** Known Proto on Non Std Port **** Weak TLS Cipher **** TLS (probably) Not Carrying HTTPS **** Missing SNI TLS Extn **** Desktop/File Sharing **][Risk Score: 220][Risk Info: Found AnyDesk / SNI should always be present / No ALPN / Cipher TLS_RSA_WITH_AES_256_GCM_SHA384 / Expected on port 443][TCP Fingerprint: 2_64_65535_15db81ff8b0d/Unknown][TLSv1.2][JA4: t12i640500_9197985d2161_a1e935682795][JA3S: 4b505adfb4a921c5a3a39d293b0811e1][Subject: CN=AnyDesk Client, CN=AnyDesk Client][Certificate SHA-1: 86:4F:2A:9F:24:71:FD:0D:6A:35:56:AC:D8:7B:3A:19:E8:03:CA:2E][Firefox][Cipher: TLS_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 0,20,0,0,0,0,0,0,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,20,0,0,20,0,0,0,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,0]
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5 TCP 192.168.149.129:36351 <-> 51.83.239.144:80 [proto: 91/TLS][IP: 252/AnyDesk][Encrypted][Confidence: DPI][FPC: 91/TLS, Confidence: DPI][DPI packets: 5][cat: Web/5][10 pkts/792 bytes <-> 10 pkts/925 bytes][Goodput ratio: 32/38][45.83 sec][bytes ratio: -0.077 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 32/31 5700/5700 15000/15001 7162/7162][Pkt Len c2s/s2c min/avg/max/stddev: 54/60 79/92 105/213 25/45][Risk: ** Known Proto on Non Std Port **][Risk Score: 50][Risk Info: Expected on port 443][Plen Bins: 0,90,0,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
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6 UDP 192.168.1.187:55376 <-> 192.168.1.1:53 [proto: 5/DNS][IP: 0/Unknown][ClearText][Confidence: DPI][FPC: 5/DNS, Confidence: DPI][DPI packets: 2][cat: Network/14][1 pkts/90 bytes <-> 1 pkts/106 bytes][Goodput ratio: 53/60][0.01 sec][Hostname/SNI: relay-9b6827f2.net.anydesk.com][138.199.36.115][DNS Id: 0xea89][PLAIN TEXT (anydesk)][Plen Bins: 0,50,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
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7 UDP 192.168.1.187:59511 <-> 192.168.1.1:53 [proto: 5/DNS][IP: 0/Unknown][ClearText][Confidence: DPI][FPC: 5/DNS, Confidence: DPI][DPI packets: 2][cat: Network/14][1 pkts/90 bytes <-> 1 pkts/106 bytes][Goodput ratio: 53/60][0.01 sec][Hostname/SNI: relay-3185a847.net.anydesk.com][37.61.223.15][DNS Id: 0xec22][PLAIN TEXT (anydesk)][Plen Bins: 0,50,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
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