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Use truncated hashes for votes #9

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Also add a nice icon to the smart ballot tracker
This commit is contained in:
Yingtong Li 2018-01-08 20:16:28 +08:00
parent c127e7ae6f
commit a47164fc53
Signed by: RunasSudo
GPG Key ID: 7234E476BF21C61A
9 changed files with 27 additions and 21 deletions
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11
eos/core/hashing/__init__.py
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@ -1,5 +1,5 @@
# Eos - Verifiable elections
# Copyright © 2017 RunasSudo (Yingtong Li)
# Copyright © 2017-18 RunasSudo (Yingtong Li)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
@ -79,11 +79,14 @@ class SHA256:
self.update_text(EosObject.to_json(EosObject.serialise_and_wrap(value, None, SerialiseOptions(for_hash=False))))
return self
def hash_as_b64(self):
def hash_as_b64(self, short=False):
if is_python:
return base64.b64encode(self.impl.digest()).decode('utf-8')
b64 = base64.b64encode(self.impl.digest()).decode('utf-8')
else:
return self.impl.getHash('B64')
b64 = self.impl.getHash('B64')
if short:
return b64[:8]
return b64
def hash_as_hex(self):
if is_python:

4
eosweb/core/static/nunjucks/booth/audit.html
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@ -2,7 +2,7 @@
{#
Eos - Verifiable elections
Copyright © 2017 RunasSudo (Yingtong Li)
Copyright © 2017-18 RunasSudo (Yingtong Li)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
@ -25,7 +25,7 @@
<p>Your vote has <span class="superem">not</span> yet been cast. Please follow the instructions to continue.</p>
</div>
<p>The following is your ballot with fingerprint <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64() }}</span>, decrypted and ready for auditing.</p>
<p>The following is your ballot with fingerprint <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64(true) }}</span>, decrypted and ready for auditing.</p>
<div class="ui form">
{# For some reason nunjucks doesn't like calling this the normal way #}

2
eosweb/core/static/nunjucks/booth/cast.html
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@ -20,7 +20,7 @@
{% block content %}
<div id="cast_prompt">
<p>Your vote has <span class="superem">not</span> yet been cast. If you have not already done so, please make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64() }}</span>.</p>
<p>Your vote has <span class="superem">not</span> yet been cast. If you have not already done so, please make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64(true) }}</span>.</p>
<div class="ui negative message">
<p>Your vote has <span class="superem">not</span> yet been cast. Please follow the instructions to continue.</p>

4
eosweb/core/static/nunjucks/booth/cast_prepoll.html
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@ -2,7 +2,7 @@
{#
Eos - Verifiable elections
Copyright © 2017 RunasSudo (Yingtong Li)
Copyright © 2017-18 RunasSudo (Yingtong Li)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
@ -25,7 +25,7 @@
<p>Your vote has <span class="superem">not</span> yet been cast. Please follow the instructions to continue.</p>
</div>
<p>If you have not already done so, please make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64() }}</span>. Please retain a copy of your ballot fingerprint – you can use it to verify that your vote has been counted correctly. You may <a href="#" onclick="window.print();return false;">print this page</a> as a receipt if you wish.</p>
<p>If you have not already done so, please make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64(true) }}</span>. Please retain a copy of your ballot fingerprint – you can use it to verify that your vote has been counted correctly. You may <a href="#" onclick="window.print();return false;">print this page</a> as a receipt if you wish.</p>
<p>To continue, copy and paste the ballot below and provide it to the election administrator.</p>

13
eosweb/core/static/nunjucks/booth/complete.html
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@ -2,7 +2,7 @@
{#
Eos - Verifiable elections
Copyright © 2017 RunasSudo (Yingtong Li)
Copyright © 2017-18 RunasSudo (Yingtong Li)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
@ -21,10 +21,13 @@
{% block content %}
<p>Your vote has been successfully cast. The following is your ‘smart ballot tracker’. Please retain a copy of your smart ballot tracker – you can use it to verify that your vote has been counted correctly. You may <a href="#" onclick="window.print();return false;">print this page</a> as a receipt if you wish.</p>
<div class="ui success message">
<div class="header">Smart ballot tracker</div>
<p>This smart ballot tracker confirms that {{ voter.py_name }} cast a vote in the election {{ election.py_name }} at {{ vote.cast_at }}.</p>
<p>Ballot fingerprint: <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(vote.ballot).hash_as_b64() }}</span></p>
<div class="ui success icon message">
<i class="check circle outline icon"></i>
<div class="content">
<div class="header">Smart ballot tracker</div>
<p>This smart ballot tracker confirms that {{ voter.py_name }} cast a vote in the election {{ election.py_name }} at {{ vote.cast_at }}.</p>
<p>Ballot fingerprint: <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(vote.ballot).hash_as_b64(true) }}</span></p>
</div>
</div>
<p>Please check that the ballot fingerprint above matches the ballot fingerprint you recorded earlier.</p>

2
eosweb/core/static/nunjucks/booth/review.html
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@ -30,7 +30,7 @@
{% include templates[selection_model_view_map[election.questions.__getitem__(loop.index0)._name]["selections_review"]] %}
{% endfor %}
<p>If you are happy with your selections, then make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64() }}</span>.</p>
<p>If you are happy with your selections, then make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64(true) }}</span>.</p>
<p>Click ‘Continue’, and you will be able to log in to cast your vote.</p>
{% endblock %}

4
eosweb/core/static/nunjucks/booth/review_prepoll.html
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@ -2,7 +2,7 @@
{#
Eos - Verifiable elections
Copyright © 2017 RunasSudo (Yingtong Li)
Copyright © 2017-18 RunasSudo (Yingtong Li)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
@ -30,7 +30,7 @@
{% include templates[selection_model_view_map[election.questions.__getitem__(loop.index0)._name]["selections_review"]] %}
{% endfor %}
<p>If you are happy with your selections, then make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64() }}</span>.</p>
<p>If you are happy with your selections, then make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64(true) }}</span>.</p>
<p>Click ‘Continue’, and you will be able to copy your pre-poll ballot to provide to the election administrator.</p>
{% endblock %}

4
eosweb/core/templates/election/auditor.html
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@ -2,7 +2,7 @@
{#
Eos - Verifiable elections
Copyright © 2017 RunasSudo (Yingtong Li)
Copyright © 2017-18 RunasSudo (Yingtong Li)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
@ -195,7 +195,7 @@
auditContentsInner.innerHTML += '<p><i class="icon"></i> Question ' + (questionNum + 1) + ': ' + election.questions.__getitem__(questionNum).pretty_answer(auditBallot.answers.__getitem__(questionNum)) + '</p>';
}
auditContentsInner.innerHTML += '<p><i class="info circle icon"></i> <b>Please check that the ballot fingerprint you recorded matches the following computed ballot fingerprint: <span class="hash">' + eosjs.eos.core.hashing.__all__.SHA256().update_obj(auditBallot).hash_as_b64() + '</span>.</b></p>';
auditContentsInner.innerHTML += '<p><i class="info circle icon"></i> <b>Please check that the ballot fingerprint you recorded matches the following computed ballot fingerprint: <span class="hash">' + eosjs.eos.core.hashing.__all__.SHA256().update_obj(auditBallot).hash_as_b64(true) + '</span>.</b></p>';
auditContentsInner.innerHTML += '<p><i class="checkmark icon"></i> If the selections are correct, and the ballot fingerprint matches, then the ballot has been prepared correctly.</p>';
return true;

4
eosweb/core/templates/election/view/ballots.html
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@ -2,7 +2,7 @@
{#
Eos - Verifiable elections
Copyright © 2017 RunasSudo (Yingtong Li)
Copyright © 2017-18 RunasSudo (Yingtong Li)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
@ -32,7 +32,7 @@
<td>{{ voter.name }}</td>
{% set votes = voter.votes.get_all() %}
{% if votes|length > 0 %}
<td class="hash">{{ SHA256().update_obj(votes[-1].ballot).hash_as_b64() }}</td>
<td class="hash">{{ SHA256().update_obj(votes[-1].ballot).hash_as_b64(True) }}</td>
{% else %}
<td class="hash"></td>
{% endif %}