Password input from terminal in Windows do not work

[gjirm]

Issue description

When launched, the application freezes and does not prompt user for a password.
This happens whenever entering password is expected from the user. For example these commands:

cosign generate-key-pair
cosign sign --key cosign.key ...

It works just fine when password is passed from stdin or from COSIGN_PASSWORD environment variable.

It seems that this is caused by golang.org/x/term module that is being used to read password from terminal, but this module does not support Windows. See module description:

"Package term provides support functions for dealing with terminals, as commonly found on UNIX systems. "

My environment

• Windows 11 (21H2 - build 22000.194), Windows 10 (21H1 - build 19043.1237)
• cosign v1.2.1
• Windows Terminal 1.10.2714.0, native cmd.exe

[developer-guy]

@dlorenc I suggest using go-isatty package to solve the problem here because this package seems to support Windows too.

Or we can use the following one:

👉 https://stackoverflow.com/questions/22744443/check-if-there-is-something-to-read-on-stdin-in-golang

stat, _ := os.Stdin.Stat()
if (stat.Mode() & os.ModeCharDevice) == 0 {
    fmt.Println("data is being piped to stdin")
} else {
    fmt.Println("stdin is from a terminal")
}