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這篇文章主要介紹Chisel是一款什么工具,文中介紹的非常詳細,具有一定的參考價值,感興趣的小伙伴們一定要看完!
Chisel是一個快速穩定的TCP/UDP隧道工具,該工具基于HTTP實現其功能,并通過SSH保證通信安全。Chisel是一個可執行文件,其中包含了客戶端和服務器端,該工具基于Go(golang)語言開發,因此具備較好的跨平臺特性。
Chisel主要可以用于繞過防火墻,但也可以用于向網絡中提供安全終端節點。
工具的運行機制如下圖所示:
易于使用;
高性能;
使用SSH協議對通信連接進行加密(通過crypto/SSH);
連接經過身份驗證;
通過用戶配置文件進行身份驗證的客戶端;
通過用戶配置文件進行身份驗證的客戶端連接;
通過指紋匹配進行身份驗證的服務器連接;
客戶端使用指數回退自動重新連接;
客戶端可以通過一個TCP連接創建多個隧道端點;
客戶端可以選擇通過SOCKS或HTTP連接代理;
反向端口轉發;
服務器反向代理;
服務器允許SOCKS5連接;
客戶端可以選擇允許從反向端口進行SOCKS5連接;
支持ssh-o ProxyCommand通過HTTP提供SSH加密;
廣大研究人員可以點擊【https://github.com/jpillora/chisel/releases/latest】訪問該項目的Releases頁面下載并安裝該工具的最新版本,或運行下列命令:
curl https://i.jpillora.com/chisel! | bash
docker run --rm -it jpillora/chisel --help
該項目包目前由Fedora社區進行維護,如果你遇到了關于RPM使用的問題,可以使用這個問題跟蹤工具【https://bugzilla.redhat.com/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&classification=Fedora&component=chisel&list_id=11614537&product=Fedora&product=Fedora%20EPEL】
sudo dnf -y install chisel
$ go get -v github.com/jpillora/chisel
$ chisel --help Usage: chisel [command] [--help] Version: X.Y.Z Commands: server - runs chisel in server mode client - runs chisel in client mode Read more: https://github.com/jpillora/chisel
$ chisel server --help Usage: chisel server [options] Options: --host, Defines the HTTP listening host – the network interface (defaults the environment variable HOST and falls back to 0.0.0.0). --port, -p, Defines the HTTP listening port (defaults to the environment variable PORT and fallsback to port 8080). --key, An optional string to seed the generation of a ECDSA public and private key pair. All communications will be secured using this key pair. Share the subsequent fingerprint with clients to enable detection of man-in-the-middle attacks (defaults to the CHISEL_KEY environment variable, otherwise a new key is generate each run). --authfile, An optional path to a users.json file. This file should be an object with users defined like: { "<user:pass>": ["<addr-regex>","<addr-regex>"] } when <user> connects, their <pass> will be verified and then each of the remote addresses will be compared against the list of address regular expressions for a match. Addresses will always come in the form "<remote-host>:<remote-port>" for normal remotes and "R:<local-interface>:<local-port>" for reverse port forwarding remotes. This file will be automatically reloaded on change. --auth, An optional string representing a single user with full access, in the form of <user:pass>. It is equivalent to creating an authfile with {"<user:pass>": [""]}. If unset, it will use the environment variable AUTH. --keepalive, An optional keepalive interval. Since the underlying transport is HTTP, in many instances we'll be traversing through proxies, often these proxies will close idle connections. You must specify a time with a unit, for example '5s' or '2m'. Defaults to '25s' (set to 0s to disable). --backend, Specifies another HTTP server to proxy requests to when chisel receives a normal HTTP request. Useful for hiding chisel in plain sight. --socks5, Allow clients to access the internal SOCKS5 proxy. See chisel client --help for more information. --reverse, Allow clients to specify reverse port forwarding remotes in addition to normal remotes. --tls-key, Enables TLS and provides optional path to a PEM-encoded TLS private key. When this flag is set, you must also set --tls-cert, and you cannot set --tls-domain. --tls-cert, Enables TLS and provides optional path to a PEM-encoded TLS certificate. When this flag is set, you must also set --tls-key, and you cannot set --tls-domain. --tls-domain, Enables TLS and automatically acquires a TLS key and certificate using LetsEncypt. Setting --tls-domain requires port 443. You may specify multiple --tls-domain flags to serve multiple domains. The resulting files are cached in the "$HOME/.cache/chisel" directory. You can modify this path by setting the CHISEL_LE_CACHE variable, or disable caching by setting this variable to "-". You can optionally provide a certificate notification email by setting CHISEL_LE_EMAIL. --tls-ca, a path to a PEM encoded CA certificate bundle or a directory holding multiple PEM encode CA certificate bundle files, which is used to validate client connections. The provided CA certificates will be used instead of the system roots. This is commonly used to implement mutual-TLS. --pid Generate pid file in current working directory -v, Enable verbose logging --help, This help text Signals: The chisel process is listening for: a SIGUSR2 to print process stats, and a SIGHUP to short-circuit the client reconnect timer Version: X.Y.Z Read more: https://github.com/jpillora/chisel
$ chisel client --help Usage: chisel client [options] <server> <remote> [remote] [remote] ... <server> is the URL to the chisel server. <remote>s are remote connections tunneled through the server, each of which come in the form: <local-host>:<local-port>:<remote-host>:<remote-port>/<protocol> ■ local-host defaults to 0.0.0.0 (all interfaces). ■ local-port defaults to remote-port. ■ remote-port is required*. ■ remote-host defaults to 0.0.0.0 (server localhost). ■ protocol defaults to tcp. which shares <remote-host>:<remote-port> from the server to the client as <local-host>:<local-port>, or: R:<local-interface>:<local-port>:<remote-host>:<remote-port>/<protocol> which does reverse port forwarding, sharing <remote-host>:<remote-port> from the client to the server's <local-interface>:<local-port>. example remotes 3000 example.com:3000 3000:google.com:80 192.168.0.5:3000:google.com:80 socks 5000:socks R:2222:localhost:22 R:socks R:5000:socks stdio:example.com:22 1.1.1.1:53/udp When the chisel server has --socks5 enabled, remotes can specify "socks" in place of remote-host and remote-port. The default local host and port for a "socks" remote is 127.0.0.1:1080. Connections to this remote will terminate at the server's internal SOCKS5 proxy. When the chisel server has --reverse enabled, remotes can be prefixed with R to denote that they are reversed. That is, the server will listen and accept connections, and they will be proxied through the client which specified the remote. Reverse remotes specifying "R:socks" will listen on the server's default socks port (1080) and terminate the connection at the client's internal SOCKS5 proxy. When stdio is used as local-host, the tunnel will connect standard input/output of this program with the remote. This is useful when combined with ssh ProxyCommand. You can use ssh -o ProxyCommand='chisel client chiselserver stdio:%h:%p' \ user@example.com to connect to an SSH server through the tunnel. Options: --fingerprint, A *strongly recommended* fingerprint string to perform host-key validation against the server's public key. Fingerprint mismatches will close the connection. Fingerprints are generated by hashing the ECDSA public key using SHA256 and encoding the result in base64. Fingerprints must be 44 characters containing a trailing equals (=). --auth, An optional username and password (client authentication) in the form: "<user>:<pass>". These credentials are compared to the credentials inside the server's --authfile. defaults to the AUTH environment variable. --keepalive, An optional keepalive interval. Since the underlying transport is HTTP, in many instances we'll be traversing through proxies, often these proxies will close idle connections. You must specify a time with a unit, for example '5s' or '2m'. Defaults to '25s' (set to 0s to disable). --max-retry-count, Maximum number of times to retry before exiting. Defaults to unlimited. --max-retry-interval, Maximum wait time before retrying after a disconnection. Defaults to 5 minutes. --proxy, An optional HTTP CONNECT or SOCKS5 proxy which will be used to reach the chisel server. Authentication can be specified inside the URL. For example, http://admin:password@my-server.com:8081 or: socks://admin:password@my-server.com:1080 --header, Set a custom header in the form "HeaderName: HeaderContent". Can be used multiple times. (e.g --header "Foo: Bar" --header "Hello: World") --hostname, Optionally set the 'Host' header (defaults to the host found in the server url). --tls-ca, An optional root certificate bundle used to verify the chisel server. Only valid when connecting to the server with "https" or "wss". By default, the operating system CAs will be used. --tls-skip-verify, Skip server TLS certificate verification of chain and host name (if TLS is used for transport connections to server). If set, client accepts any TLS certificate presented by the server and any host name in that certificate. This only affects transport https (wss) connection. Chisel server's public key may be still verified (see --fingerprint) after inner connection is established. --tls-key, a path to a PEM encoded private key used for client authentication (mutual-TLS). --tls-cert, a path to a PEM encoded certificate matching the provided private key. The certificate must have client authentication enabled (mutual-TLS). --pid Generate pid file in current working directory -v, Enable verbose logging --help, This help text Signals: The chisel process is listening for: a SIGUSR2 to print process stats, and a SIGHUP to short-circuit the client reconnect timer Version: X.Y.Z Read more: https://github.com/jpillora/chisel
我們提供了一個Demo應用程序(https://chisel-demo.herokuapp.com/),它會運行這個chisel server:
$ chisel server --port $PORT --proxy http://example.com # listens on $PORT, proxy web requests to http://example.com
這個Demo應用程序還會運行一個簡單的文件服務器(端口為:3000),由于Heroku防火墻的存在,我們是無法直接訪問它的。但是,我們可以通過隧道來實現訪問:
$ chisel client https://chisel-demo.herokuapp.com 3000 # connects to chisel server at https://chisel-demo.herokuapp.com, # tunnels your localhost:3000 to the server's localhost:3000
接下來,打開瀏覽器并訪問localhost:3000,此時我們將看到服務器的文件目錄。
通信連接始終啟用了加密。當你啟動Chisel服務器時,它將會在內存中生成一個ECDSA公鑰/私鑰對。其中的公鑰指紋(Base64編碼的SHA256)將在服務器啟動時顯示。服務器可以選擇使用--key選項指定密鑰種子,而不是生成隨機密鑰,該選項將用于為密鑰生成種子。當客戶端連接時,它們還將顯示服務器的公鑰指紋。客戶端可以使用--fingerprint選項指定特定的指紋。
使用--authfile選項,服務器可以選擇提供用戶.json配置文件以創建接受的用戶訪問列表。然后,客戶端使用--auth選項進行身份驗證。我們可以查看users.json以獲取認證配置文件樣例。使用--help查看更多幫助信息。
在內部,這是使用SSH提供的密碼驗證方法實現的。點擊【http://blog.gopheracademy.com/go-and-ssh/?】了解更多關于SSH加密的信息。
1、開啟你的Chisel服務器:
docker run \ --name chisel -p 9312:9312 \ -d --restart always \ jpillora/chisel server -p 9312 --socks5 --key supersecret
2、連接你的Chisel客戶端(使用服務器的指紋信息):
chisel client --fingerprint 'rHb55mcxf6vSckL2AezFV09rLs7pfPpavVu++MF7AhQ=' <server-address>:9312 socks
3、指向你的Socks5客戶端:
<client-address>:1080
4、現在你的通信將被加密,并通過HTTP實現已認證的Socks5連接。
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