cis-kuldeep/PyBitmessage-2021-04-27
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Constant time decryption

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Always try to decrypt with all keys.
This commit is contained in:
Peter Šurda 2016-02-18 16:01:06 +01:00
parent 0e59102f11
commit 0dae345ce5
Signed by untrusted user: PeterSurda
GPG Key ID: 0C5F50C0B5F37D87
1 changed files with 14 additions and 10 deletions
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24
src/class_objectProcessor.py
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@ -335,11 +335,13 @@ class objectProcessor(threading.Thread):
for key, cryptorObject in shared.myECCryptorObjects.items():
try:
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
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'))
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:
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
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'))
except Exception as err:
pass
# print 'cryptorObject.decrypt Exception:', err