So I needed to take in a pasted stdin that was multiple lines. Using just read or any of the flags it provides don’t give a nice clean way to do this. However, using cat and sed, you can provide a few nice ways to allow a user to end the input stream and submit their entry:
Ctrl+d:
#!/bin/bash
echo "Pipe in certificate, or paste and it ctrl-d when done"
keyvariable=$(cat)
Blank Line:
#!/bin/bash</p><p>
echo "Paste certificate and end with a blank line:"
keyvariable=$(sed '/^$/q')
Thanks, stackoverflow