key-specific dyndns commands

4 files changed, 62 insertions, 0 deletions

diff --git a/src/dyndns-command.sh b/src/dyndns-command.sh
new file mode 100755
index 0000000..1061b31
--- /dev/null
+++ b/src/dyndns-command.sh
@@ -0,0 +1,59 @@
+#!/bin/bash
+subdomain=${SSH_REMOTE_FINGERPRINT//:/}
+ip_address=${SSH_CLIENT%% *}
+lan_address="$SSH_ORIGINAL_COMMAND"
+
+domain=ssh.cryptonomic.net 
+
+sqlescape()
+{
+        printf '%s' "'${1/\'/\'\'}'"
+}
+
+add()
+{
+        local newdomain="$(sqlescape "$1.$domain")" ip_address="$(sqlescape "$2")" domain="$(sqlescape "$domain")"
+
+        sqlite3 /etc/powerdns/powerdns.sqlite3 <<END
+BEGIN;
+        delete from records where type='A' and name=$newdomain;
+
+        insert into records
+
+                (domain_id,
+                name,
+                type,
+                content,
+                ttl,
+                prio)
+
+                select
+                        id,
+                        $newdomain,
+                        'A',
+                        $ip_address,
+                        3600,
+                        0
+                from domains
+                where name=$domain;
+COMMIT;
+END
+        if [ $? = 0 ]; then
+                printf '%s\n' "$1 $2"
+        fi
+}
+
+add "$subdomain" "$ip_address"
+
+set -- $lan_address
+while [ $# -ge 2 ]; do
+        d=$1
+        ip=$2
+        shift 2
+        
+        case "$d" in
+                *.*) continue;;
+        esac
+        
+        add "$d.$subdomain" "$ip"
+done
diff --git a/src/dyndns.ecdsa-sha2-nistp256.cryptonomic.net b/src/dyndns.ecdsa-sha2-nistp256.cryptonomic.net
new file mode 120000
index 0000000..e46be55
--- /dev/null
+++ b/src/dyndns.ecdsa-sha2-nistp256.cryptonomic.net
@@ -0,0 +1 @@
+dyndns.ssh-rsa.cryptonomic.net
\ No newline at end of file
diff --git a/src/dyndns.ssh-dss.cryptonomic.net b/src/dyndns.ssh-dss.cryptonomic.net
new file mode 120000
index 0000000..e46be55
--- /dev/null
+++ b/src/dyndns.ssh-dss.cryptonomic.net
@@ -0,0 +1 @@
+dyndns.ssh-rsa.cryptonomic.net
\ No newline at end of file
diff --git a/src/dyndns.ssh-ed25519.cryptonomic.net b/src/dyndns.ssh-ed25519.cryptonomic.net
new file mode 120000
index 0000000..e46be55
--- /dev/null
+++ b/src/dyndns.ssh-ed25519.cryptonomic.net
@@ -0,0 +1 @@
+dyndns.ssh-rsa.cryptonomic.net
\ No newline at end of file