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Hash the same content covered by the signature when referencing previous PDUs rather than reusing the PDU content hashes

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This commit is contained in:
Mark Haines 2014-10-17 11:40:35 +01:00
parent bb04447c44
commit c8f996e29f
6 changed files with 84 additions and 16 deletions
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44
synapse/storage/signatures.py
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@ -21,7 +21,7 @@ from twisted.internet import defer
class SignatureStore(SQLBaseStore):
"""Persistence for PDU signatures and hashes"""
def _get_pdu_hashes_txn(self, txn, pdu_id, origin):
def _get_pdu_content_hashes_txn(self, txn, pdu_id, origin):
"""Get all the hashes for a given PDU.
Args:
txn (cursor):
@ -32,13 +32,14 @@ class SignatureStore(SQLBaseStore):
"""
query = (
"SELECT algorithm, hash"
" FROM pdu_hashes"
" FROM pdu_content_hashes"
" WHERE pdu_id = ? and origin = ?"
)
txn.execute(query, (pdu_id, origin))
return dict(txn.fetchall())
def _store_pdu_hash_txn(self, txn, pdu_id, origin, algorithm, hash_bytes):
def _store_pdu_content_hash_txn(self, txn, pdu_id, origin, algorithm,
hash_bytes):
"""Store a hash for a PDU
Args:
txn (cursor):
@ -47,13 +48,48 @@ class SignatureStore(SQLBaseStore):
algorithm (str): Hashing algorithm.
hash_bytes (bytes): Hash function output bytes.
"""
self._simple_insert_txn(txn, "pdu_hashes", {
self._simple_insert_txn(txn, "pdu_content_hashes", {
"pdu_id": pdu_id,
"origin": origin,
"algorithm": algorithm,
"hash": buffer(hash_bytes),
})
def _get_pdu_reference_hashes_txn(self, txn, pdu_id, origin):
"""Get all the hashes for a given PDU.
Args:
txn (cursor):
pdu_id (str): Id for the PDU.
origin (str): origin of the PDU.
Returns:
A dict of algorithm -> hash.
"""
query = (
"SELECT algorithm, hash"
" FROM pdu_reference_hashes"
" WHERE pdu_id = ? and origin = ?"
)
txn.execute(query, (pdu_id, origin))
return dict(txn.fetchall())
def _store_pdu_reference_hash_txn(self, txn, pdu_id, origin, algorithm,
hash_bytes):
"""Store a hash for a PDU
Args:
txn (cursor):
pdu_id (str): Id for the PDU.
origin (str): origin of the PDU.
algorithm (str): Hashing algorithm.
hash_bytes (bytes): Hash function output bytes.
"""
self._simple_insert_txn(txn, "pdu_reference_hashes", {
"pdu_id": pdu_id,
"origin": origin,
"algorithm": algorithm,
"hash": buffer(hash_bytes),
})
def _get_pdu_origin_signatures_txn(self, txn, pdu_id, origin):
"""Get all the signatures for a given PDU.
Args: