croc
croc
是一个命令行传输工具,支持两台电脑之间快速和安全的传输文件和目录。
特性
- allows any two computers to transfer data (using a relay)
- provides end-to-end encryption (using PAKE)
- enables easy cross-platform transfers (Windows, Linux, Mac)
- allows multiple file transfers
- allows resuming transfers that are interrupted
- local server or port-forwarding not needed
- ipv6-first with ipv4 fallback
- can use proxy, like tor
For more information about croc
, see my blog post.
安装
Download the latest release for your system, or install a release from the command-line:
$ curl https://getcroc.schollz.com | bash
On macOS you can install the latest release with Homebrew:
$ brew install croc
On macOS you can also install the latest release with MacPorts:
$ sudo port selfupdate
$ sudo port install croc
On Windows you can install the latest release with Scoop or Chocolatey:
$ scoop install croc
$ choco install croc
On Unix you can install the latest release with Nix:
$ nix-env -i croc
On Alpine Linux you have to install dependencies first:
$ apk add bash coreutils
$ wget -qO- https://getcroc.schollz.com | bash
On Arch Linux you can install the latest release with pacman
:
$ pacman -S croc
On Gentoo you can install with portage
:
$ emerge net-misc/croc
On Termux you can install with pkg
:
$ pkg install croc
On FreeBSD you can install with pkg
:
$ pkg install croc
Or, you can install Go and build from source (requires Go 1.12+):
$ GO111MODULE=on go get -v github.com/schollz/croc/v8
使用
To send a file, simply do:
$ croc send [file(s)-or-folder]
Sending 'file-or-folder' (X MB)
Code is: code-phrase
Then to receive the file (or folder) on another computer, you can just do
$ croc code-phrase
The code phrase is used to establish password-authenticated key agreement (PAKE) which generates a secret key for the sender and recipient to use for end-to-end encryption.
There are a number of configurable options (see --help
). A set of options (like custom relay, ports, and code phrase) can be set using --remember
.
Custom code phrase
You can send with your own code phrase (must be more than 4 characters).
$ croc send --code [code-phrase] [file(s)-or-folder]
Use pipes - stdin and stdout
You can pipe to croc
:
$ cat [filename] | croc send
In this case croc
will automatically use the stdin data and send and assign a filename like "croc-stdin-123456789". To receive to stdout
at you can always just use the --yes
will automatically approve the transfer and pipe it out to stdout
.
$ croc --yes [code-phrase] > out
All of the other text printed to the console is going to stderr
so it will not interfere with the message going to stdout
.
Send text
Sometimes you want to send URLs or short text. In addition to piping, you can easily send text with croc
:
$ croc send --text "hello world"
This will automatically tell the receiver to use stdout
when they receive the text so it will be displayed.
Use a proxy
You can use a proxy as your connection to the relay by adding a proxy address with --socks5
. For example, you can send via a tor relay:
$ croc --socks5 "127.0.0.1:9050" send SOMEFILE
Self-host relay
The relay is needed to staple the parallel incoming and outgoing connections. By default, croc
uses a public relay but you can also run your own relay:
$ croc relay
By default it uses TCP ports 9009-9013. Make sure to open those up. You can customized the ports (e.g. croc relay --ports 1111,1112
), but you must have a minimum of 2 ports for the relay. The first port is for communication and the subsequent ports are used for the multiplexed data transfer.
You can send files using your relay by entering --relay
to change the relay that you are using if you want to custom host your own.
$ croc --relay "myrelay.example.com:9009" send [filename]
Note, when sending, you only need to include the first port (the communication port). The subsequent ports for data transfer will be transmitted back to the user from the relay.
Self-host relay (docker)
If it's easier you can also run a relay with Docker:
$ docker run -d -p 9009-9013:9009-9013 -e CROC_PASS='YOURPASSWORD' schollz/croc
Be sure to include the password for the relay otherwise any requests will be rejected.
$ croc --pass YOURPASSWORD --relay "myreal.example.com:9009" send [filename]
Note: when including --pass YOURPASSWORD
you can instead pass a file with the password, e.g. --pass FILEWITHPASSWORD
.
License
MIT
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