From 654596ea79f22946d6055a853652be504d30def8 Mon Sep 17 00:00:00 2001 From: Callum Fraser Date: Tue, 15 May 2018 23:48:33 +0100 Subject: [PATCH] Ported "Parse IPv6 Address" --- src/core/operations/ParseIPv6Address.mjs | 191 +++++++++++++++++++++++ 1 file changed, 191 insertions(+) create mode 100644 src/core/operations/ParseIPv6Address.mjs diff --git a/src/core/operations/ParseIPv6Address.mjs b/src/core/operations/ParseIPv6Address.mjs new file mode 100644 index 00000000..8eadc13b --- /dev/null +++ b/src/core/operations/ParseIPv6Address.mjs @@ -0,0 +1,191 @@ +/** + * @author n1474335 [n1474335@gmail.com] + * @copyright Crown Copyright 2016 + * @license Apache-2.0 + */ + +import Operation from "../Operation"; +import Utils from "../Utils"; +import {_strToIpv6, _ipv6ToStr, _ipv4ToStr, IPV6_REGEX} from "../lib/Ip"; +import BigInteger from "jsbn"; + +/** + * Parse IPv6 address operation + */ +class ParseIPv6Address extends Operation { + + /** + * ParseIPv6Address constructor + */ + constructor() { + super(); + + this.name = "Parse IPv6 address"; + this.module = "JSBN"; + this.description = "Displays the longhand and shorthand versions of a valid IPv6 address.

Recognises all reserved ranges and parses encapsulated or tunnelled addresses including Teredo and 6to4."; + this.inputType = "string"; + this.outputType = "string"; + this.args = []; + } + + /** + * @param {string} input + * @param {Object[]} args + * @returns {string} + */ + run(input, args) { + let match, + output = ""; + + if ((match = IPV6_REGEX.exec(input))) { + const ipv6 = _strToIpv6(match[1]), + longhand = _ipv6ToStr(ipv6), + shorthand = _ipv6ToStr(ipv6, true); + + output += "Longhand: " + longhand + "\nShorthand: " + shorthand + "\n"; + + // Detect reserved addresses + if (shorthand === "::") { + // Unspecified address + output += "\nUnspecified address corresponding to 0.0.0.0/32 in IPv4."; + output += "\nUnspecified address range: ::/128"; + } else if (shorthand === "::1") { + // Loopback address + output += "\nLoopback address to the local host corresponding to 127.0.0.1/8 in IPv4."; + output += "\nLoopback addresses range: ::1/128"; + } else if (ipv6[0] === 0 && ipv6[1] === 0 && ipv6[2] === 0 && + ipv6[3] === 0 && ipv6[4] === 0 && ipv6[5] === 0xffff) { + // IPv4-mapped IPv6 address + output += "\nIPv4-mapped IPv6 address detected. IPv6 clients will be handled natively by default, and IPv4 clients appear as IPv6 clients at their IPv4-mapped IPv6 address."; + output += "\nMapped IPv4 address: " + _ipv4ToStr((ipv6[6] << 16) + ipv6[7]); + output += "\nIPv4-mapped IPv6 addresses range: ::ffff:0:0/96"; + } else if (ipv6[0] === 0 && ipv6[1] === 0 && ipv6[2] === 0 && + ipv6[3] === 0 && ipv6[4] === 0xffff && ipv6[5] === 0) { + // IPv4-translated address + output += "\nIPv4-translated address detected. Used by Stateless IP/ICMP Translation (SIIT). See RFCs 6145 and 6052 for more details."; + output += "\nTranslated IPv4 address: " + _ipv4ToStr((ipv6[6] << 16) + ipv6[7]); + output += "\nIPv4-translated addresses range: ::ffff:0:0:0/96"; + } else if (ipv6[0] === 0x100) { + // Discard prefix per RFC 6666 + output += "\nDiscard prefix detected. This is used when forwarding traffic to a sinkhole router to mitigate the effects of a denial-of-service attack. See RFC 6666 for more details."; + output += "\nDiscard range: 100::/64"; + } else if (ipv6[0] === 0x64 && ipv6[1] === 0xff9b && ipv6[2] === 0 && + ipv6[3] === 0 && ipv6[4] === 0 && ipv6[5] === 0) { + // IPv4/IPv6 translation per RFC 6052 + output += "\n'Well-Known' prefix for IPv4/IPv6 translation detected. See RFC 6052 for more details."; + output += "\nTranslated IPv4 address: " + _ipv4ToStr((ipv6[6] << 16) + ipv6[7]); + output += "\n'Well-Known' prefix range: 64:ff9b::/96"; + } else if (ipv6[0] === 0x2001 && ipv6[1] === 0) { + // Teredo tunneling + output += "\nTeredo tunneling IPv6 address detected\n"; + const serverIpv4 = (ipv6[2] << 16) + ipv6[3], + udpPort = (~ipv6[5]) & 0xffff, + clientIpv4 = ~((ipv6[6] << 16) + ipv6[7]), + flagCone = (ipv6[4] >>> 15) & 1, + flagR = (ipv6[4] >>> 14) & 1, + flagRandom1 = (ipv6[4] >>> 10) & 15, + flagUg = (ipv6[4] >>> 8) & 3, + flagRandom2 = ipv6[4] & 255; + + output += "\nServer IPv4 address: " + _ipv4ToStr(serverIpv4) + + "\nClient IPv4 address: " + _ipv4ToStr(clientIpv4) + + "\nClient UDP port: " + udpPort + + "\nFlags:" + + "\n\tCone: " + flagCone; + + if (flagCone) { + output += " (Client is behind a cone NAT)"; + } else { + output += " (Client is not behind a cone NAT)"; + } + + output += "\n\tR: " + flagR; + + if (flagR) { + output += " Error: This flag should be set to 0. See RFC 5991 and RFC 4380."; + } + + output += "\n\tRandom1: " + Utils.bin(flagRandom1, 4) + + "\n\tUG: " + Utils.bin(flagUg, 2); + + if (flagUg) { + output += " Error: This flag should be set to 00. See RFC 4380."; + } + + output += "\n\tRandom2: " + Utils.bin(flagRandom2, 8); + + if (!flagR && !flagUg && flagRandom1 && flagRandom2) { + output += "\n\nThis is a valid Teredo address which complies with RFC 4380 and RFC 5991."; + } else if (!flagR && !flagUg) { + output += "\n\nThis is a valid Teredo address which complies with RFC 4380, however it does not comply with RFC 5991 (Teredo Security Updates) as there are no randomised bits in the flag field."; + } else { + output += "\n\nThis is an invalid Teredo address."; + } + output += "\n\nTeredo prefix range: 2001::/32"; + } else if (ipv6[0] === 0x2001 && ipv6[1] === 0x2 && ipv6[2] === 0) { + // Benchmarking + output += "\nAssigned to the Benchmarking Methodology Working Group (BMWG) for benchmarking IPv6. Corresponds to 198.18.0.0/15 for benchmarking IPv4. See RFC 5180 for more details."; + output += "\nBMWG range: 2001:2::/48"; + } else if (ipv6[0] === 0x2001 && ipv6[1] >= 0x10 && ipv6[1] <= 0x1f) { + // ORCHIDv1 + output += "\nDeprecated, previously ORCHIDv1 (Overlay Routable Cryptographic Hash Identifiers).\nORCHIDv1 range: 2001:10::/28\nORCHIDv2 now uses 2001:20::/28."; + } else if (ipv6[0] === 0x2001 && ipv6[1] >= 0x20 && ipv6[1] <= 0x2f) { + // ORCHIDv2 + output += "\nORCHIDv2 (Overlay Routable Cryptographic Hash Identifiers).\nThese are non-routed IPv6 addresses used for Cryptographic Hash Identifiers."; + output += "\nORCHIDv2 range: 2001:20::/28"; + } else if (ipv6[0] === 0x2001 && ipv6[1] === 0xdb8) { + // Documentation + output += "\nThis is a documentation IPv6 address. This range should be used whenever an example IPv6 address is given or to model networking scenarios. Corresponds to 192.0.2.0/24, 198.51.100.0/24, and 203.0.113.0/24 in IPv4."; + output += "\nDocumentation range: 2001:db8::/32"; + } else if (ipv6[0] === 0x2002) { + // 6to4 + output += "\n6to4 transition IPv6 address detected. See RFC 3056 for more details." + + "\n6to4 prefix range: 2002::/16"; + + const v4Addr = _ipv4ToStr((ipv6[1] << 16) + ipv6[2]), + slaId = ipv6[3], + interfaceIdStr = ipv6[4].toString(16) + ipv6[5].toString(16) + ipv6[6].toString(16) + ipv6[7].toString(16), + interfaceId = new BigInteger(interfaceIdStr, 16); + + output += "\n\nEncapsulated IPv4 address: " + v4Addr + + "\nSLA ID: " + slaId + + "\nInterface ID (base 16): " + interfaceIdStr + + "\nInterface ID (base 10): " + interfaceId.toString(); + } else if (ipv6[0] >= 0xfc00 && ipv6[0] <= 0xfdff) { + // Unique local address + output += "\nThis is a unique local address comparable to the IPv4 private addresses 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. See RFC 4193 for more details."; + output += "\nUnique local addresses range: fc00::/7"; + } else if (ipv6[0] >= 0xfe80 && ipv6[0] <= 0xfebf) { + // Link-local address + output += "\nThis is a link-local address comparable to the auto-configuration addresses 169.254.0.0/16 in IPv4."; + output += "\nLink-local addresses range: fe80::/10"; + } else if (ipv6[0] >= 0xff00) { + // Multicast + output += "\nThis is a reserved multicast address."; + output += "\nMulticast addresses range: ff00::/8"; + } + + + // Detect possible EUI-64 addresses + if ((ipv6[5] & 0xff === 0xff) && (ipv6[6] >>> 8 === 0xfe)) { + output += "\n\nThis IPv6 address contains a modified EUI-64 address, identified by the presence of FF:FE in the 12th and 13th octets."; + + const intIdent = Utils.hex(ipv6[4] >>> 8) + ":" + Utils.hex(ipv6[4] & 0xff) + ":" + + Utils.hex(ipv6[5] >>> 8) + ":" + Utils.hex(ipv6[5] & 0xff) + ":" + + Utils.hex(ipv6[6] >>> 8) + ":" + Utils.hex(ipv6[6] & 0xff) + ":" + + Utils.hex(ipv6[7] >>> 8) + ":" + Utils.hex(ipv6[7] & 0xff), + mac = Utils.hex((ipv6[4] >>> 8) ^ 2) + ":" + Utils.hex(ipv6[4] & 0xff) + ":" + + Utils.hex(ipv6[5] >>> 8) + ":" + Utils.hex(ipv6[6] & 0xff) + ":" + + Utils.hex(ipv6[7] >>> 8) + ":" + Utils.hex(ipv6[7] & 0xff); + output += "\nInterface identifier: " + intIdent + + "\nMAC address: " + mac; + } + } else { + return "Invalid IPv6 address"; + } + return output; + } + +} + +export default ParseIPv6Address;