• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

password in memory

 
Greenhorn
Posts: 27
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I have to get rid of a password in memory after decrypted and used. The password is encypt and decrypt with JCE. I was thinking such:

StringBuffer x = Pass.decrypt();

//use it

for(d=0; d<x.length();d++)
x.setCharAt(d,'X');

x=null;

I guess I have to do the same thing to the decrypted password in the decrypt() method.

Any thoughts?
 
Greenhorn
Posts: 12
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You can store the encrypted password in the heap, and have each function that needs the password to decrypt the password as a local variable on the stack. As stack memory is very temporary unlike heap memory, the clear-text password will only be visible for a limited amount of time.

Originally posted by Jim Frank:
I have to get rid of a password in memory after decrypted and used. The password is encypt and decrypt with JCE. I was thinking such:

StringBuffer x = Pass.decrypt();

//use it

for(d=0; d<x.length();d++)
x.setCharAt(d,'X');

x=null;

I guess I have to do the same thing to the decrypted password in the decrypt() method.

Any thoughts?

 
Consider Paul's rocket mass heater.
reply
    Bookmark Topic Watch Topic
  • New Topic