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authorVictor Shyba <victor1984@riseup.net>2017-03-15 20:29:03 -0300
committerdrebs <drebs@leap.se>2017-04-04 18:27:33 +0200
commit0b9d59f0a61ac05aa1dd751d17f2ef58eea8a2d0 (patch)
tree670aff6d43014e0b5d0c591c9d222e59a4512531 /client/src/leap/soledad
parent3ae9343ebe4f3b7ddcdafcee22c987e49dead451 (diff)
[feature] unarmored incremental blobs decrypt
Diffstat (limited to 'client/src/leap/soledad')
-rw-r--r--client/src/leap/soledad/client/_blobs.py45
1 files changed, 31 insertions, 14 deletions
diff --git a/client/src/leap/soledad/client/_blobs.py b/client/src/leap/soledad/client/_blobs.py
index 97d4c39c..e0326378 100644
--- a/client/src/leap/soledad/client/_blobs.py
+++ b/client/src/leap/soledad/client/_blobs.py
@@ -23,6 +23,7 @@ from urlparse import urljoin
import os.path
import uuid
+import base64
from io import BytesIO
from functools import partial
@@ -92,29 +93,45 @@ class ConnectionPool(adbapi.ConnectionPool):
class DecrypterBuffer(object):
- def __init__(self, doc_id, rev, secret):
+ def __init__(self, doc_id, rev, secret, tag):
self.decrypter = None
self.buffer = BytesIO()
self.doc_info = DocInfo(doc_id, rev)
self.secret = secret
+ self.tag = tag
self.d = None
def write(self, data):
if not self.decrypter:
+ return self.prepare_decrypter(data)
+
+ self.buffer.write(data)
+ if self.buffer.tell() > 16:
+ overflow_size = self.buffer.tell() - 16
+ self.buffer.seek(0)
+ self.decrypter.write(self.buffer.read(overflow_size))
+ remaining = self.buffer.read()
+ self.buffer.seek(0)
+ self.buffer.write(remaining)
+ self.buffer.truncate()
+
+ def prepare_decrypter(self, data):
+ if ' ' not in data:
self.buffer.write(data)
- self.decrypter = BlobDecryptor(
- self.doc_info, self.buffer,
- secret=self.secret,
- armor=True,
- start_stream=False)
- self.d = self.decrypter.decrypt()
- else:
- self.decrypter.write(data)
+ return
+ preamble_chunk, remaining = data.split(' ', 1)
+ self.buffer.write(preamble_chunk)
+ self.decrypter = BlobDecryptor(
+ self.doc_info, BytesIO(self.buffer.getvalue()),
+ secret=self.secret,
+ armor=False,
+ start_stream=False,
+ tag=self.tag)
+ self.buffer = BytesIO()
+ self.write(remaining)
def close(self):
- if self.d:
- self.d.addCallback(lambda result: (result, self.decrypter.size))
- return self.d
+ return self.decrypter._end_stream(), self.decrypter.size
class BlobManager(object):
@@ -188,7 +205,7 @@ class BlobManager(object):
doc_info = DocInfo(doc_id, rev)
uri = urljoin(self.remote, self.user + "/" + blob_id)
crypter = BlobEncryptor(doc_info, fd, secret=self.secret,
- armor=True)
+ armor=False)
fd = yield crypter.encrypt()
yield treq.put(uri, data=fd)
logger.info("Finished upload: %s" % (blob_id,))
@@ -212,7 +229,7 @@ class BlobManager(object):
# incrementally collect the body of the response
yield treq.collect(data, buf.write)
- fd, size = yield buf.close()
+ fd, size = buf.close()
logger.info("Finished download: (%s, %d)" % (blob_id, size))
defer.returnValue((fd, size))