Streaming message digest calculator: Insert digest calculation inside pipe
Get executable binaries from GitHub Releases
Here is an example to use digestream
. The command below allows you to download ubuntu.iso
and calculate message digest at the same time.
curl http:https://releases.ubuntu.com/18.04/ubuntu-18.04.1-desktop-amd64.iso | digestream > ubuntu.iso
Then you will have a SHA-256 digest as follows in tty.
5748706937539418ee5707bd538c4f5eabae485d17aa49fb13ce2c9b70532433
Note that the message digest, 5748706937...433
is output to tty not to stdout.
The command above is the same as curl ... > ubuntu.iso
except for digest calculation.
One of the motivations of digestream
is for Piping Server, which is a server to allow users to transfer data via HTTP.
You can get more information in https://github.com/nwtgck/piping-server.
By using digestream
, users get more confident to send data correctly.
# Sender
seq 1000 | digestream | curl -T - https://piping.glitch.me/myseq
# Receiver
curl https://piping.glitch.me/myseq | digestream > myseq.txt
Here is examples to use md5
, sham256
and sha512
. In current implementation, sham256
is the default algorithm. But the default algorithm may be changed in the future by technology improvement.
echo "hello, world" | digestream md5
echo "hello, world" | digestream sha256
echo "hello, world" | digestream sha512
You can get all algorithms by digestream -h
.
Dige(st + St)ream
Usage:
digestream [flags]
digestream [command]
Available Commands:
help Help about any command
md5 MD5
sha1 SHA-1
sha256 SHA-256
sha512 SHA-512
Flags:
-h, --help help for digestream
Use "digestream [command] --help" for more information about a command.