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authorVictor Shyba <victor1984@riseup.net>2017-09-20 03:54:51 -0300
committerVictor Shyba <victor1984@riseup.net>2017-10-05 05:41:40 -0300
commitaef72180f681a46534c0d934a62c1376ea2489db (patch)
tree91591d6e4d3cd91d4b97213aee3d1de3d65f71fe /src
parentfd99f15f1da1bed6c223876b7e2e72477ca8b2ee (diff)
[feature] improve preamble comparisons
We were comparing the raw content of preambles. This commit adds a way to compare excluding time so comparisons don't suffer from false negatives caused by time deltas. -- Resolves: #8920
Diffstat (limited to 'src')
-rw-r--r--src/leap/soledad/common/blobs/preamble.py19
1 files changed, 18 insertions, 1 deletions
diff --git a/src/leap/soledad/common/blobs/preamble.py b/src/leap/soledad/common/blobs/preamble.py
index d4065c38..a8446c0d 100644
--- a/src/leap/soledad/common/blobs/preamble.py
+++ b/src/leap/soledad/common/blobs/preamble.py
@@ -26,6 +26,7 @@ holds data about encryption scheme, iv, document id and sync related data.
str(self.rev), -> current revision
self._content_size) -> size, rounded to ceiling
"""
+import base64
import warnings
import struct
import time
@@ -66,8 +67,24 @@ class Preamble(object):
self.content_size)
return preamble
+ def __eq__(self, other):
+ # timestamp insn't included on comparison on purpose since it's not
+ # part of the document identity (you can have the very same document at
+ # two different times, but you can't have any other field changed and
+ # still be able to consider it as the same document).
+ fields = ['doc_id', 'rev', 'scheme', 'method', 'iv', 'magic',
+ 'content_size']
+ for field in fields:
+ if not hasattr(other, field):
+ return False
+ if getattr(self, field) != getattr(other, field):
+ return False
+ return True
-def decode_preamble(encoded_preamble):
+
+def decode_preamble(encoded_preamble, armored=False):
+ if armored:
+ encoded_preamble = base64.b64decode(encoded_preamble)
preamble_size = len(encoded_preamble)
try:
if preamble_size == LEGACY_PACMAN.size: