cis-kuldeep/PyBitmessage-2021-04-27
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Constant time decryption

Browse Source 
Always try to decrypt with all keys.
This commit is contained in:
Peter Šurda 2016-02-18 16:01:06 +01:00
parent 4c2ce7208c
commit 9239813ebb
1 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/class_objectProcessor.py
View File

@ -335,11 +335,13 @@ class objectProcessor(threading.Thread):
for key, cryptorObject in shared.myECCryptorObjects.items():
try:
if initialDecryptionSuccessful: # continue decryption attempts to avoid timing attacks
cryptorObject.decrypt(data[readPosition:])
else:
decryptedData = cryptorObject.decrypt(data[readPosition:])
toRipe = key # This is the RIPE hash of my pubkeys. We need this below to compare to the destination_ripe included in the encrypted data.
initialDecryptionSuccessful = True
logger.info('EC decryption successful using key associated with ripe hash: %s.' % key.encode('hex'))
break
except Exception as err:
pass
if not initialDecryptionSuccessful:
@ -615,11 +617,13 @@ class objectProcessor(threading.Thread):
initialDecryptionSuccessful = False
for key, cryptorObject in shared.MyECSubscriptionCryptorObjects.items():
try:
if initialDecryptionSuccessful: # continue decryption attempts to avoid timing attacks
cryptorObject.decrypt(data[readPosition:])
else:
decryptedData = cryptorObject.decrypt(data[readPosition:])
toRipe = key # This is the RIPE hash of the sender's pubkey. We need this below to compare to the RIPE hash of the sender's address to verify that it was encrypted by with their key rather than some other key.
initialDecryptionSuccessful = True
logger.info('EC decryption successful using key associated with ripe hash: %s' % key.encode('hex'))
break
except Exception as err:
pass
# print 'cryptorObject.decrypt Exception:', err