From 34a605e16d71d3bcc8b3294de345e8fc1ebcc312 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Wed, 23 Oct 2019 10:48:26 -0400
Subject: add "dyndns.ssh-rsa.cryptonomic.net" command and related

---
 Makefile                           | 10 +++++++++-
 src/dyndns.ssh-rsa.cryptonomic.net | 13 +++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100755 src/dyndns.ssh-rsa.cryptonomic.net

diff --git a/Makefile b/Makefile
index 1be8347..a0b1c61 100644
--- a/Makefile
+++ b/Makefile
@@ -19,11 +19,19 @@ samizdat-pinentry: src/samizdat-pinentry.c
 wait_for_files: src/wait_for_files.c
 	$(CC) $(CFLAGS)  $< -o $@
 
+dyndns_realprog = dyndns.ssh-rsa.cryptonomic.net
+dyndns_links = dyndns.ssh-dss.cryptonomic.net                                 \
+dyndns.ecdsa-sha2-nistp256.cryptonomic.net dyndns.ssh-ed25519.cryptonomic.net
+dyndns_progs = $(dyndns_realprog) $(dyndns_links)
+
+$(addprefix src/, $(dyndns_links)):
+	ln -s $(dyndns_realprog) $@
+
 src_bin_programs = xorriso-usb.sh btrfs-functions.sh btrfs-receive-root.sh      \
 btrfs-send-root.sh var.sh grub-efi.sh keygen.sh initrd.sh qemu.sh               \
 dnsmasq-dhcp-script.sh samizdat-password-agent samizdat-gpg-agent publish-ip.sh \
 selfstrap samizdat-daily-snapshot-root samizdat-diff-root kiki-export-stdout    \
-kiki-import-stdin
+kiki-import-stdin $(dyndns_progs)
 
 bin_programs=$(addprefix src/, $(src_bin_programs)) samizdat-paths.sh ${cc_files} ${btrfs_utils}
 
diff --git a/src/dyndns.ssh-rsa.cryptonomic.net b/src/dyndns.ssh-rsa.cryptonomic.net
new file mode 100755
index 0000000..824f0b9
--- /dev/null
+++ b/src/dyndns.ssh-rsa.cryptonomic.net
@@ -0,0 +1,13 @@
+#!/bin/sh
+self=${0##*/}
+keytype=${self#dyndns.}
+keytype=${keytype%%.*}
+
+case "$keytype" in
+  ssh-dss) keyfilename=dsa ;;
+  ecdsa-sha2-nistp256) keyfilename=ecdsa ;;
+  ssh-rsa|ssh-ed25519) keyfilename=${keytype#ssh-} ;;
+  *) exit 1 ;;
+esac
+
+sudo ssh -i /etc/ssh/ssh_host_${keyfilename}_key "$@" dyndns@cryptonomic.net
-- 
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