Clears the contents of bytes or integers containing cryptographic material
Project description
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## Install:
pip install git+https://github.com/VidaID/pysecbytes.git
## Use:
Currently supports clearing integers, strings and bytes
from SecureBytes import clearmem, safemem
x = b’data that must be removed’
copy_of_x = x
clearmem(x)
assert(b’data’ not in copy_of_x)
In python3 only, temporarily overriding mem allocator to zero ram and prevent paging:
- with safemem():
x = b’data that must be removed’ del x
# x is not in ram
## Warnings:
Do not try to derive from str or bytes… extra copies of your data will be made
Clearing strings and bytes also clears all references to them
If you choose store sensitive material in a class, and put clearmem in __del__, it will only be cleared when the last reference is freed
“safemem” is not yet efficient (TODO) nor does it prevent swapping (TODO)
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