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62 lines
1.7 KiB
Python
62 lines
1.7 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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"""
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Blockstack
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~~~~~
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copyright: (c) 2014-2015 by Halfmoon Labs, Inc.
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copyright: (c) 2016 by Blockstack.org
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This file is part of Blockstack
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Blockstack is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Blockstack is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Blockstack. If not, see <http://www.gnu.org/licenses/>.
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"""
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import virtualchain
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import hashlib
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from virtualchain.lib.hashing import hex_hash160
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log = virtualchain.get_logger("blockstack-server")
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def get_data_hash(data_txt):
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"""
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Generate a hash over data for immutable storage.
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Return the hex string.
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"""
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h = hashlib.sha256()
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h.update(data_txt)
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return h.hexdigest()
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def get_zonefile_data_hash(data_txt):
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"""
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Generate a hash over a user's zonefile.
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Return the hex string.
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"""
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return hex_hash160(data_txt)
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def verify_zonefile( zonefile_str, value_hash ):
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"""
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Verify that a zonefile hashes to the given value hash
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@zonefile_str must be the zonefile as a serialized string
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"""
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zonefile_hash = get_zonefile_data_hash( zonefile_str )
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if zonefile_hash != value_hash:
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log.debug("Zonefile hash mismatch: expected %s, got %s" % (value_hash, zonefile_hash))
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return False
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return True
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