Cant create wallet

[yhaenggi]

When i try to create a wallet i get this (.armory/armorylog.txt):

2012-11-30 17:45 (INFO) -- qtdialogs.py:332 - KDF takes 60.00 seconds and 8589934592 bytes
2012-11-30 17:45 (INFO) -- armoryengine.py:6505 - ***Creating new deterministic wallet
2012-11-30 17:45 (INFO) -- armoryengine.py:6511 - (with encryption)
2012-11-30 17:45 (INFO) -- armoryengine.py:6513 - Target (time,RAM)=(60.000,8589934592)
2012-11-30 17:45 (ERROR) -- Traceback (most recent call last):
  File "/usr/share/armory/ArmoryQt.py", line 2110, in createNewWallet
    doRegisterWithBDM=False)
  File "/usr/share/armory/armoryengine.py", line 6515, in createNewWallet
    kdfTargSec, kdfMaxMem)
  File "/usr/share/armory/armoryengine.py", line 7082, in computeSystemSpecificKdfParams
    kdf.computeKdfParams(targetSec, long(maxMem))
  File "/usr/share/armory/CppBlockUtils.py", line 1611, in computeKdfParams
    def computeKdfParams(self, targetComputeSec=0.25, maxMemReqtsBytes=32*1024*1024): return _CppBlockUtils.KdfRomix_computeKdfParams(self, targetComputeSec, maxMemReqtsBytes)
NotImplementedError: Wrong number or type of arguments for overloaded function 'KdfRomix_computeKdfParams'.
  Possible C/C++ prototypes are:
    KdfRomix::computeKdfParams(double,uint32_t)
    KdfRomix::computeKdfParams(double)
    KdfRomix::computeKdfParams()

[etotheipi]

Hi K1773R,

It looks like to me that you overflowed the key-stretching function, by specifying 8 GB of RAM be used for converting your passphrase into an encryption key. The maximum value that can be accepted by the underlying C++ call is 4 GB. I probably should've anticipated that and done some extra error checking there...

Also, you might want to consider using a time value less than 60s... that's kind of extreme :) Even with the default 0.25s, if you tried to bruteforce a completely random 6-character password, it would take up to 900 years! As long as the resulting RAM usage is above 1-2 MB you are protected against GPU-acceleration (and probably even at smaller RAM values than that). Using 60s means that you will be waiting 30-60s every time you want to unlock your wallet, such as printing a backup, or sending a transaction.

Admittedly, you are the first person in 8 months that has overflowed that function. But I'll throw in a warning message for the next person that does it.

[yhaenggi]

i already thougd its a u_int32 limiatation since i saw it in the logfile.
this should fix it:

--- armoryengine.py.orig    2012-11-30 18:38:57.560395895 +0100
+++ armoryengine.py 2012-11-30 18:46:35.020396086 +0100
@@ -6241,6 +6241,10 @@

       if withEncrypt and not securePassphrase:
          raise EncryptionError, 'Cannot create encrypted wallet without passphrase'
+         
+      if kdfMaxMem > 4194304000:
+         LOGINFO('ERROR: Max memory for KDF is 4GB!');
+         raise NotImplementedError, 'Max memory for KDF is 4GB, please specify a lower value!'

       LOGINFO('***Creating new deterministic wallet')

EDIT: had to change the patch since i didnt work with 4096MB (4GB), changed it to 4000MB and worked :)

[yhaenggi]

closing -> old