Linux
Do something like...
#!/bin/bash
echo "Enter Password: "
read pass
echo $pass | sudo cryptsetup luksOpen /dev/sdb1 media1
echo $pass | sudo cryptsetup luksOpen /dev/sda1 media2
sudo mount /dev/mapper/media1 /mnt/media1
sudo mount /dev/mapper/media2 /mnt/media2
echo "Media Partitions Mounted"