Re: [GNU Crypto] Passwords Immutable?

[Bryan Hoover <bhoover@xxxxxxxx>]

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Casey Marshall wrote:
> `append' would break the contract of immutability, and I think making
> them immutable, but destroyable, is best.

Yeah, your right.  Bad idea.

> Bryan> Could handwave, with the observation that plain text ain't any
> Bryan> too secure anyway :), but CramMD5Client does something similar
> Bryan> with String data, where again, an append method would take care
> Bryan> of it.
>
> There really isn't much sense is worrying about PLAIN. Probably the
> best thing to do is use CharEncoder or OutputStreamWriter and
> ByteArrayOutputStream.

Ignoring PLAIN is reasonable (though a wee bit discriminatory :)).  But
there's the MD5 mechanism too.

My thinking is that any data structure that a shared secret goes into,
ought to be a decendant of DestroyableObject.  In this light, that
concatenated user info/password ought to go to Password construction
together.

However, since Password then becomes somewhat of a misnomer (which may
or may not be "overthinking" depending on perspective), I was thinking
I'd just refactor the DestroyableObject/Password hierarchy, to include
a, say, "SecureData" class or some such -- the hierarchy would go
DestroyableObject-->SecureData-->Password, with the MD5 mechanism data
stored in a SecureData object.

The refactoring would be isolated relative to Password, and SecureData,
and would not require any changes to existing Password data type patch
proliferation.

Bryan
>
> - --
> Casey Marshall || csm@xxxxxxx
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