#!/bin/sh

my_ssh_port='[CENSORED]'
my_ssh_user='[CENSORED]'
my_identity_file='/home/[CENSORED]/.ssh/id_rsa'
localhost_ip='127.0.0.1'
black_hole='/dev/null'

trap cancel 1 2 3 6

cancel()
{
    echo
    echo
    echo "Cancelling..."
    exit 1
}

# cipher list
for cipher in
    3des-cbc aes128-cbc aes192-cbc aes256-cbc rijndael-cbc@lysator.liu.se aes128-ctr aes192-ctr
    aes256-ctr aes128-gcm@openssh.com aes256-gcm@openssh.com chacha20-poly1305@openssh.com
do
    echo
    echo $cipher
    # copy command
    # port
    # SSH option(s)
    # my private key
    # file to copy from localhost RAM disk
    # destination for the file
    scp
    -P "${my_ssh_port}"
    -o Cipher="${cipher}"
    -i "${my_identity_file}"
    /mnt/tmpfs/NonCompressibleEncryptedFile4GiB
    "${my_ssh_user}"@"${localhost_ip}":"${black_hole}"
done

3des-cbc
NonCompressibleEncryptedFile4GiB              100% 3804MB 269.9MB/s   00:14

aes128-cbc
NonCompressibleEncryptedFile4GiB              100% 3804MB 260.9MB/s   00:14

aes192-cbc
NonCompressibleEncryptedFile4GiB              100% 3804MB 268.0MB/s   00:14

aes256-cbc
NonCompressibleEncryptedFile4GiB              100% 3804MB 269.4MB/s   00:14

rijndael-cbc@lysator.liu.se
NonCompressibleEncryptedFile4GiB              100% 3804MB 268.7MB/s   00:14

aes128-ctr
NonCompressibleEncryptedFile4GiB              100% 3804MB 265.6MB/s   00:14

aes192-ctr
NonCompressibleEncryptedFile4GiB              100% 3804MB 265.9MB/s   00:14

aes256-ctr
NonCompressibleEncryptedFile4GiB              100% 3804MB 260.6MB/s   00:14

aes128-gcm@openssh.com
NonCompressibleEncryptedFile4GiB              100% 3804MB 265.3MB/s   00:14

aes256-gcm@openssh.com
NonCompressibleEncryptedFile4GiB              100% 3804MB 270.8MB/s   00:14

chacha20-poly1305@openssh.com
NonCompressibleEncryptedFile4GiB              100% 3804MB 272.1MB/s   00:13

$ pv < /mnt/tmpfs/NonCompressibleEncryptedFile4GiB > /dev/null
3,71GiB 0:00:00 [7,24GiB/s] [================================>] 100%

fs=/mnt/tmpfs/NonCompressibleEncryptedFile4GiB     # source file
fd=/dev/stdout                                     # send to stdout
fn=/dev/null                                       # null device

$ dd if=$fs of=$fn
28398935 bytes (28 MB, 27 MiB) copied, 0.16205 s, 175 MB/s

$ scp $fs  $fd | dd of=$fn
28398935 bytes (28 MB, 27 MiB) copied, 0.225373 s, 126 MB/s