From: Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Date: Thu, 6 Mar 2014 18:29:33 +0000 (-0500)
Subject: dnsfile for stashing a file in DNS
X-Git-Url: https://hydra-www.ietfng.org/gitweb/?a=commitdiff_plain;h=9deb9a99bde1051d578c7d3f8784d5cfe01ce18e;p=smallutils

dnsfile for stashing a file in DNS
---

diff --git a/dnsfile.sh b/dnsfile.sh
new file mode 100755
index 0000000..c27f9c1
--- /dev/null
+++ b/dnsfile.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+# Defines a general purpose UUENCODING-as-TXT scheme.
+# Run as ./dnsfilee.sh FILE DNS-LOCATION
+
+if [ $# != 2 ]; then echo "Need file and dns suffix"; exit 1; fi
+
+FILE=$1
+DNSFILE=$2
+DNSTIME=$((24*60*60))
+
+encode_counted_line() {
+        # DJBDNS:
+        sed -e 's/\\/\\134/g' -e 's/:/\\072/g' \
+          | awk -e "//{ print \$1\".$1:\"\$2\":$DNSTIME\"; }"
+        # BIND:
+        # sed -e "s/\s*\([0-9][0-9]*\)\s*\(.*\)/\1.$DNSFILE $DNSTIME IN TXT \"\2\"/"
+}
+encode_raw_line() {
+        # DJBDNS:
+        sed -e 's/\\/\\134/g' -e 's/:/\\072/g' -e "s/\(.*\)/'$1:\1:$DNSTIME/"
+        # BIND:
+        # sed -e "s/\(.*\)/$1.$DNSFILE $DNSTIME IN TXT \"\1\"/"
+}
+
+dosha() {
+        # Linux
+        sha1sum | cut -f 1 -d ' '
+        # BSD
+        # sha1 | sed -e "s/.* \([0-9a-f]*\)\$/\1/" |
+}
+
+uuencode `basename $FILE` < $FILE | cat -n | encode_counted_line "$DNSFILE"
+cat $FILE | dosha | encode_raw_line "sha1.$DNSFILE"