Initial version of gerrit-contactstoreHEADv1.0master

Receives encrypted contact information from Gerrit and stores it
into Google App Engine.  Application developers can login through
the web UI, locate records, and save them locally for decryption.

Signed-off-by: Shawn O. Pearce <sop@google.com>

12 files changed, 717 insertions, 0 deletions

diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,202 @@
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diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
new file mode 100755
index 0000000..6126f62
--- /dev/null
+++ b/GIT-VERSION-GEN
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+VN=$(git describe --abbrev=8 HEAD 2>/dev/null)
+case "$VN" in
+v[0-9]*) : happy ;;
+*)       exit 1  ;;
+esac
+
+dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
+case "$dirty" in
+'')
+	;;
+*)
+	VN="$VN-dirty" ;;
+esac
+
+echo $VN
diff --git a/README b/README
new file mode 100644
index 0000000..f36c325
--- /dev/null
+++ b/README
@@ -0,0 +1,83 @@
+gerrit-contactstore
+===================
+
+Utilities to receive contact information for individual users from
+Gerrit and archive them in an encrypted store.
+
+Gerrit connects to the store by sending a standard HTTP POST request
+to the store URL, with the following form parameters in the body:
+
+* APPSEC
+
+  A shared secret "password" that should be known only to Gerrit
+  and the contact store.  The contact store should test this value
+  to deter spamming of the contact store by outside parties.
+
+* account_id
+
+  Unique account_id value from the Gerrit database for the account
+  the contact information belongs to.  Base 10 integer.
+
+* email
+
+  Preferred email address of the account.  May facilitate lookups
+  in the contact store at a future date.  May not be provided.
+
+* filed
+
+  Seconds since the UNIX epoch of when the contact information
+  was filed.  May be omitted or the empty string if the application
+  doesn't think the supplied contact information is valid enough.
+
+* data
+
+  Encrypted account data as an armored ASCII blob.  This is usually
+  several KB of text data as a single string, with embedded newlines
+  to break the lines at about 70-75 characters.  Data can be decoded
+  using GnuPG with the correct private key.
+
+Using HTTPS for the store is encouraged, as it prevents
+man-in-the-middle attacks at reading the shared secret
+APPSEC token, or messing with the data packet.
+
+A successful store should respond with HTTP status code "200 OK"
+and a text/plain content consisting of only "OK\n".  Any other
+response is considered to be a store failure.
+
+
+Implementations
+---------------
+
+google_appengine/
+~~~~~~~~~~~~~~~~~
+
+This implementation of the contact store runs on Google App Engine.
+
+It is a two very small Python CGIs: main.py receives the data and
+secure.py permits some limited searching and retrieval of the data
+by the application's owners (aka "developers" to Google App Engine).
+
+The encrypted data payload is stored as-is when received; that is
+the data stays fully encrypted within AppEngine, and the private
+key is never stored on AppEngine.  It is therefore impossible for
+Google to decipher or otherwise read the contact information stored.
+
+To use this implementation, sign up for a free AppEngine account,
+then install the code with:
+
+  cd google_appengine
+  make APPID=your-app-id-here update
+
+and configure Gerrit to use your new application instance:
+
+  $ psql reviewdb
+  UPDATE system_config SET
+   contact_store_url = 'https://your-app-id-here.appspot.com/store'
+  ,contact_store_appsec = 'appsec-key-printed-during-update';
+
+Later you can search for and download the encrypted contact
+information by visiting your application over the web at
+https://your-app-id-here.appspot.com/.  Note that you must
+sign-in with a developer account.  This provides a very simple
+access control system; to add additional users invite them to
+be developers of your application.
diff --git a/google_appengine/.gitignore b/google_appengine/.gitignore
new file mode 100644
index 0000000..a438a9c
--- /dev/null
+++ b/google_appengine/.gitignore
@@ -0,0 +1,3 @@
+*.pyc
+/config.mak
+/release
diff --git a/google_appengine/Makefile b/google_appengine/Makefile
new file mode 100644
index 0000000..9608a96
--- /dev/null
+++ b/google_appengine/Makefile
@@ -0,0 +1,54 @@
+# gerrit-contactstore for Google App Engine
+#
+# Define APPID to the unique Google App Engine application instance
+# 'make update' will upload the application files to.
+#
+# Define APPSEC to the security token clients must present in order
+# to upload to this application instance.  Default is to generate
+# a random string.
+#
+# Define APPCFG to the location of appcfg.py from the Google App
+# Engine SDK download.
+#
+
+APPID   = gerrit-contactstore
+APPSEC  = $(shell sh -c 'dd if=/dev/urandom bs=128 count=1 2>/dev/null | md5sum | sed s/-//')
+APPCFG  = appcfg.py
+CPIO    = cpio -pd
+
+ifeq ($(shell uname),Darwin)
+	APPCFG = python /usr/local/bin/appcfg.py
+endif
+
+-include config.mak
+
+R_WEB      := release/web
+
+WEB_INCLUDE := $(strip \
+	app.yaml \
+	index.yaml \
+	static \
+	*.py \
+)
+
+release-web:
+	@echo Building gerrit-contactstore `../GIT-VERSION-GEN`  for $(APPID):
+	@rm -rf $(R_WEB)
+	@mkdir -p $(R_WEB)
+	@echo "  Copying loose files" && \
+	 find $(WEB_INCLUDE) -print | $(CPIO) $(abspath $(R_WEB))
+	@../GIT-VERSION-GEN >$(R_WEB)/static/application_version
+	@perl -pi -e 's/(application:).*/$$1 $(APPID)/' $(R_WEB)/app.yaml
+	@a=$(APPSEC);echo "APPSEC='$$a'" >$(R_WEB)/appsec.py
+	@cat $(R_WEB)/appsec.py
+	@echo $(R_WEB) built for $(APPID).
+
+update: release-web
+	$(APPCFG) $(APPCFG_OPTS) update $(R_WEB)
+
+version:
+	@printf '%s = ' '$(APPID)'
+	@curl http://$(APPID).appspot.com/application_version
+
+clean:
+	@rm -rf release *.pyc
diff --git a/google_appengine/app.yaml b/google_appengine/app.yaml
new file mode 100644
index 0000000..b3a523b
--- /dev/null
+++ b/google_appengine/app.yaml
@@ -0,0 +1,27 @@
+application: gerrit-contactstore
+version: 1
+runtime: python
+api_version: 1
+default_expiration: 7d
+
+handlers:
+- url: /(robots.txt)
+  static_files: static/\1
+  upload: static/robots.txt
+  secure: never
+
+- url: /(application_version)
+  static_files: static/\1
+  mime_type: text/plain
+  expiration: 1s
+  upload: static/application_version
+  secure: never
+
+- url: /secure/.*
+  script: secure.py
+  login: admin
+  secure: always
+
+- url: .*
+  script: main.py
+  secure: always
diff --git a/google_appengine/index.yaml b/google_appengine/index.yaml
new file mode 100644
index 0000000..61cef18
--- /dev/null
+++ b/google_appengine/index.yaml
@@ -0,0 +1,24 @@
+indexes:
+
+- kind: ContactInfo
+  properties:
+  - name: account_id
+  - name: filed
+    direction: desc
+  - name: __key__
+
+- kind: ContactInfo
+  properties:
+  - name: email
+  - name: account_id
+  - name: filed
+    direction: desc
+  - name: __key__
+
+- kind: ContactInfo
+  properties:
+  - name: domain
+  - name: account_id
+  - name: filed
+    direction: desc
+  - name: __key__
diff --git a/google_appengine/main.py b/google_appengine/main.py
new file mode 100644
index 0000000..63f92c3
--- /dev/null
+++ b/google_appengine/main.py
@@ -0,0 +1,102 @@
+# Copyright 2009 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from datetime import datetime
+from google.appengine.ext import db
+from google.appengine.ext import webapp
+from google.appengine.ext.webapp.util import run_wsgi_app
+
+from appsec import APPSEC
+from model import ContactInfo
+
+def _CreateApplication():
+  return webapp.WSGIApplication([
+    (r'^/store',  StoreContact),
+    (r'^/',       GoSecure),
+    (r'^/.*',     PageNotFound),
+  ],
+  debug=False)
+
+class StoreContact(webapp.RequestHandler):
+  def get(self):
+    self.post()
+
+  def post(self):
+    self.response.headers['Content-Type'] = 'text/plain; charset=utf-8'
+    ci = ContactInfo()
+    try:
+      if APPSEC != self.request.get('APPSEC'):
+        raise ValueError
+
+      ci.account_id = int(self.request.get('account_id'))
+      if ci.account_id < 1:
+        raise ValueError
+
+      d = self.request.get('data')
+      if d is None or len(d) < 1:
+        raise ValueError
+      ci.data = db.Blob(d.encode('utf-8'))
+
+      ci.email = self.request.get('email')
+      if ci.email is None or len(ci.email) == 0:
+        ci.email = None
+        ci.domain = None
+      else:
+        ci.email = ci.email.lower()
+        ci.domain = ci.email[ci.email.index('@') + 1:]
+
+      f = self.request.get('filed')
+      if f is None or len(f) == 0:
+        f = datetime.utcnow()
+      else:
+        f = datetime.utcfromtimestamp(int(f))
+      ci.filed = f
+    except:
+      self.response.set_status(500)
+      self.response.out.write('BAD INPUT\n')
+      raise
+
+    try:
+      ci.put()
+    except:
+      self.response.set_status(500)
+      self.response.out.write('DATA STORE FAIL\n')
+      raise
+
+    self.response.set_status(200)
+    self.response.out.write('OK\n')
+
+class GoSecure(webapp.RequestHandler):
+  def get(self):
+    self.redirect('/secure/', permanent=True)
+
+class PageNotFound(webapp.RequestHandler):
+  def get(self):
+    self.response.set_status(404)
+    self.response.headers['Content-Type'] = 'text/html; charset=utf-8'
+    self.response.out.write("""<html>
+<head>
+  <title>Not Found</title>
+</head>
+<body>
+<h1>Not Found</h1>
+</html>
+""")
+
+def main():
+  run_wsgi_app(application)
+
+if __name__ == '__main__':
+  application = _CreateApplication()
+  main()
diff --git a/google_appengine/model.py b/google_appengine/model.py
new file mode 100644
index 0000000..2a49c84
--- /dev/null
+++ b/google_appengine/model.py
@@ -0,0 +1,23 @@
+# Copyright 2009 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from google.appengine.ext import db
+
+class ContactInfo(db.Model):
+  account_id = db.IntegerProperty()
+  stored = db.DateTimeProperty(auto_now_add=True)
+  filed = db.DateTimeProperty()
+  email = db.StringProperty()
+  domain = db.StringProperty()
+  data = db.BlobProperty()
diff --git a/google_appengine/secure.py b/google_appengine/secure.py
new file mode 100644
index 0000000..3bd8d3d
--- /dev/null
+++ b/google_appengine/secure.py
@@ -0,0 +1,174 @@
+# Copyright 2009 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import cgi
+from google.appengine.ext import db
+from google.appengine.ext import webapp
+from google.appengine.ext.webapp.util import run_wsgi_app
+
+from model import ContactInfo
+
+def _CreateApplication():
+  return webapp.WSGIApplication([
+    (r'^/secure/$',             ShowForm),
+    (r'^/secure/account_id$',   QueryAccountId),
+    (r'^/secure/email$',        QueryEmail),
+    (r'^/secure/domain$',       QueryDomain),
+    (r'^/secure/show$',         ShowData),
+  ],
+  debug=False)
+
+def esc(s):
+  if s is None:
+    return ''
+  return cgi.escape(s)
+
+def td(out, s):
+  if s is None:
+    s = '&nbsp;'
+  else:
+    s = esc(str(s))
+  out.write('<td>')
+  out.write(s)
+  out.write('</td>')
+
+class ShowForm(webapp.RequestHandler):
+  def get(self):
+    self.response.set_status(200)
+    self.response.headers['Content-Type'] = 'text/html; charset=utf-8'
+    self.response.out.write("""<html>
+<head>
+  <title>Query</title>
+</head>
+<body>
+<h1>Query</h1>
+
+<div>
+  <form action="account_id" method="POST">
+  <b>Account ID:</b>
+  <input type="text" name="q" size="25" />
+  <input type="submit" value="Search" />
+  </form>
+</div>
+
+<div>
+  <form action="email" method="POST">
+  <b>Email Address:</b>
+  <input type="text" name="q" size="25" />
+  <input type="submit" value="Search" />
+  </form>
+</div>
+
+<div>
+  <form action="domain" method="POST">
+  <b>Domain:</b>
+  @<input type="text" name="q" size="25" />
+  <input type="submit" value="Search" />
+  </form>
+</div>
+
+</html>
+""")
+
+class QueryBase(webapp.RequestHandler):
+  def post(self):
+    q = self.request.get('q').lower()
+    if q in ('', 'null', 'none'):
+      q = None
+
+    self.response.set_status(200)
+    self.response.headers['Content-Type'] = 'text/html; charset=utf-8'
+    self.response.out.write("""<html>
+<head>
+  <title>Query</title>
+</head>
+<body>
+<h1>Query '%s'</h1>
+<table border="1">
+<tr>
+  <th>Account</th>
+  <th>Email</th>
+  <th>Filed</th>
+  <th>Stored</th>
+</tr>
+""" % (esc(q)))
+
+    found = list(self.query_for(q))
+    for ci in found:
+      self.response.out.write('<tr>')
+      self.response.out.write('<td align="right"><a href="show?key=%s">%d</a></td>'
+        % (esc(str(ci.key())), ci.account_id))
+      td(self.response.out, ci.email)
+      td(self.response.out, ci.filed)
+      td(self.response.out, ci.stored)
+      self.response.out.write('</tr>\n')
+
+    self.response.out.write("""</table>
+%d matches found.
+</body>
+</html>
+""" % len(found))
+
+class QueryAccountId(QueryBase):
+  def query_for(self, q):
+    return ContactInfo.gql(
+      'WHERE account_id = :1 ORDER BY filed DESC, __key__',
+      int(q)
+    )
+
+class QueryEmail(QueryBase):
+  def query_for(self, q):
+    return ContactInfo.gql(
+      'WHERE email = :1 ORDER BY account_id, filed DESC, __key__',
+      q
+    )
+
+class QueryDomain(QueryBase):
+  def query_for(self, q):
+    return ContactInfo.gql(
+      'WHERE domain = :1 ORDER BY account_id, filed DESC, __key__',
+      q
+    )
+
+class ShowData(webapp.RequestHandler):
+  def get(self):
+    try:
+      key = db.Key(self.request.get('key'))
+    except:
+      self.response.set_status(404)
+      self.response.headers['Content-Type'] = 'text/plain; charset=utf-8'
+      self.response.out.write('Not Found\n')
+      return
+
+    ci = ContactInfo.get(key)
+    if ci is None:
+      self.response.set_status(404)
+      self.response.headers['Content-Type'] = 'text/plain; charset=utf-8'
+      self.response.out.write('Not Found\n')
+    else:
+      self.response.set_status(200)
+      self.response.headers['Content-Type'] \
+        = 'application/octet-stream'
+      self.response.headers['Content-Length'] \
+        = len(ci.data)
+      self.response.headers['Content-Disposition'] \
+        = 'inline; filename="account_%d.enc"' % ci.account_id
+      self.response.out.write(ci.data)
+
+def main():
+  run_wsgi_app(application)
+
+if __name__ == '__main__':
+  application = _CreateApplication()
+  main()
diff --git a/google_appengine/static/application_version b/google_appengine/static/application_version
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/google_appengine/static/application_version
diff --git a/google_appengine/static/robots.txt b/google_appengine/static/robots.txt
new file mode 100644
index 0000000..c033917
--- /dev/null
+++ b/google_appengine/static/robots.txt
@@ -0,0 +1,8 @@
+# Directions for web crawlers.
+# See http://www.robotstxt.org/wc/norobots.html.
+
+User-agent: HTTrack
+User-agent: puf
+User-agent: MSIECrawler
+User-agent: Nutch
+Disallow: /