How to make bash script ask for a password?

I want to secure the execution of a program with a password. How can I ask the user to enter a password without echoing it?

Solution

stty_orig=$(stty -g) # save original terminal setting.
stty -echo           # turn-off echoing.
IFS= read -r passwd  # read the password
stty "$stty_orig"    # restore terminal setting.