Create mailboxes - postreich - Unnamed repository; edit this file 'description' to name the repository.
DIR Log
DIR Files
DIR Refs
DIR README
---
DIR commit 8330df15a5ef86740b64621ddd57ce8060647f18
DIR parent 0ad10cb546a1b1f266b7c3014960ef28fa8d12f0
HTML Author: Scarlett McAllister <no+reply@roygbyte.com>
Date: Wed, 17 Jan 2024 19:21:23 -0400
Create mailboxes
Diffstat:
A geomyidae/postoffice/common | 24 ++++++++++++++++++++++++
A geomyidae/postoffice/create-mailbox | 48 +++++++++++++++++++++++++++++++
A geomyidae/postoffice/get-mailbox | 37 +++++++++++++++++++++++++++++++
A geomyidae/postoffice/index.cgi | 15 +++++++++++++++
A geomyidae/postoffice/send-mail | 29 +++++++++++++++++++++++++++++
5 files changed, 153 insertions(+), 0 deletions(-)
---
DIR diff --git a/geomyidae/postoffice/common b/geomyidae/postoffice/common
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+MAILBOXES="mailboxes"
+MAILROOM="mailroom"
+
+sanitize_restful_path() {
+ printf "%s" "$1" \
+ | sed -E 's/[^a-zA-Z0-9\-\/_]//g'
+}
+
+sanitize_base64() {
+ printf "%s" "$1" \
+ | sed -E 's/[^a-zA-Z0-9\-\/_?+=]//g'
+}
+
+sanitize_handle() {
+ printf "%s" "$1" \
+ | sed -E 's/[^a-zA-Z0-9\-\\_+=]//g' \
+ | head -c 16
+}
+
+decode_and_verify_pubkey() {
+
+}
DIR diff --git a/geomyidae/postoffice/create-mailbox b/geomyidae/postoffice/create-mailbox
@@ -0,0 +1,48 @@
+#!/bin/sh
+# Arguments:
+# $1 should be a handle no longer than 16 bytes.
+# $2 should be a base64 encoded RSA public key.
+# Return:
+#
+. ./common
+
+handle=$( sanitize_handle "$1" )
+base64_payload=$( sanitize_base64 "$2" )
+decoded_payload=$( printf "%s" "$base64_payload" \
+ | base64 -d --ignore-garbage ) # wrap? -w 0
+# test result of `base64` invocation.
+if [ ! $? ]; then
+ printf "Invalid input given. Payload was not base 64.\n"
+ return 1
+fi
+
+printf "%s" "$decoded_payload" \
+ | openssl pkey -pubcheck -pubin > /dev/null
+# test result of `openssl` invocation.
+if [ ! $? ]; then
+ printf "Key is not valid.\n"
+ return 1
+fi
+public_key="$decoded_payload"
+
+result=$( ./get-mailbox "$handle" )
+exit_code=$?
+case $exit_code in
+ 0)
+ printf "That mailbox already exists.\n"
+ return 1
+ ;;
+ 1)
+ printf "$result"
+ return 1
+ ;;
+ 2)
+ printf "%s\t%s\n" "$handle" "$base64_payload" >> "$MAILBOXES"
+ return 0
+ ;;
+ *)
+ printf "Undocumented behavior.\n"
+ return 1
+ ;;
+esac
+
DIR diff --git a/geomyidae/postoffice/get-mailbox b/geomyidae/postoffice/get-mailbox
@@ -0,0 +1,37 @@
+#!/bin/sh
+# Args:
+# $1 handle
+
+. ./common
+
+if [ ! -r $MAILBOXES ]; then
+ printf "Can't find or read mailbox file.\n"
+ return 1
+fi
+
+handle=$( sanitize_handle "$1" )
+if [ ! -n "$handle" ]; then
+ printf "Specify a handle.\n"
+ return 1
+fi
+
+mailbox=$( awk -v handle="$handle" '
+BEGIN {
+ FS = "\t"
+}
+{
+ if ( handle == $1 ) {
+ print $2 # return public key
+ exit 0
+ }
+}
+' "$MAILBOXES" )
+
+if [ ! -n "$mailbox" ]; then
+ printf "Mailbox not found.\n"
+ return 2
+fi
+
+printf "%s\n" "$mailbox"
+return 0
+
DIR diff --git a/geomyidae/postoffice/index.cgi b/geomyidae/postoffice/index.cgi
@@ -0,0 +1,15 @@
+#!/bin/sh
+. ./common
+
+path=$( sanitize_restful_path "$TRAVERSAL" )
+args="$2"
+
+case "$path" in
+ /mailbox/create/*)
+ handle=$( printf "%s" "$path" \
+ | awk -F/ '{ print $4 }' )
+ ./create-mailbox "$handle" "$args"
+ ;;
+esac
+
+
DIR diff --git a/geomyidae/postoffice/send-mail b/geomyidae/postoffice/send-mail
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Args:
+# $1 handle of recipient
+# $2 message
+#
+. ./common
+
+# I am sanitizing inside the ./get-mailbox program, so do I need
+# to do it here for any reason?
+handle=$( sanitize_handle "$1" )
+result=$( ./get-mailbox "$handle" )
+exit_code=$?
+if [ ! $exit_code ]; then
+ printf "$result"
+ return 1
+fi
+
+public_key=$( printf "%s" "$result" \
+ | base64 -d --ignore-garbage )
+
+# need to decode the mailbox pubkey
+# need to encrypt the message with the pubkey
+# need to add the message to a mailheap/mailroom file, <pubkey>\t<message>
+# or should it be handle\tmessage
+
+# need to verify the message is below a certain length
+# need to verify the chosen border exists
+
+