generatekeys.py gives incorrect key values

[asm582]

when we run generatekeys.py over an existing key, it gives some weird keys! below is observed behavior, as shared by albert as well:-

python generatekeys.py abc 4096
Generating key files called 'abc.publickey' and 'abc.privatekey' of length 4096.
This may take a moment...
Success!
$ wc abc*
0 3 2469 abc.privatekey
0 2 1239 abc.publickey
0 5 3708 total
$ openssl md5 abc*
MD5(abc.privatekey)= a510da7973bce6e114a7277ab1d7c122
MD5(abc.publickey)= f700ed9253d5f4f54d5054c89d39fe9e

Okay, that's the 4096-bit key's stats. Recreate using the same key name but shorter (!) length:

$ python generatekeys.py abc 1024
Generating key files called 'abc.publickey' and 'abc.privatekey' of length 1024.
This may take a moment...
Success!
$ wc abc*
0 5 2469 abc.privatekey
0 2 1239 abc.publickey
0 7 3708 total
$ openssl md5 abc*
MD5(abc.privatekey)= f2d4f2f15071705b11a1efa926f8ff94
MD5(abc.publickey)= 1c25c843d8dd171e6f3280650bfecc3c

Ouch, file size didn't change, but contents changed. This must not happen.

For comparison, a proper 1024-bit key has much smaller files:

$ python generatekeys.py def 1024
Generating key files called 'def.publickey' and 'def.privatekey' of length 1024.
This may take a moment...
Success!
$ wc def*
0 3 619 def.privatekey
0 2 314 def.publickey
0 5 933 total

[asm582]

Can we add a check in generatekeys.py to check if file exists and i exists, clear the files and then generate keys in the file??