On Jan 31, 2010, at 2:15 AM, Dr. David Kirkby wrote:
Dr. David Kirkby wrote:
I was not actually suggesting shipping OpenSSL, as I knew there
were license implications.
But I think you would have to agree it is pretty annoying for
someone to download Sage, start a build, then the build fail due to
lack of OpenSSL.
I do not believe this issue is unique to Solaris either. I very
much doubt Cygwin, or many small linux distos come with OpenSSL,
but it would need to be selected, then downloaded from a server. So
one could not argue the operating system comes with it.
I just installed cygwin. Sure enough, there is no SSL support by
default. You have to make a positive effort to select it. As such, I
do not believe OpenSSL is a library that is part of the normal
Cygwin distribution. Just selecting all the defaults will give you
no OpenSSL libraries.
It seems to me, there are 3 choices.
1) Get the Python developers to agree to allow python to link
against OpenSSL. Then you could
* Ship OpenSSL
* Get rid of a load of stuff.
That seems the best solution to me, IF they would agree. It's not
one you can expect to do today though.
2) Stop supporting Sage on any platform which does not come with SSL
as part of the normal operating system distribution - that would
include both Solaris and Cygwin. That seems the dumbest idea.
3) Change Sage so that the hashlib module of python is not essential
for a functioning Sage. That is I suspect the easiest option. I
don't claim to understand how Sage builds fully, but I would have
thought crypto support was not a requirement.
The only place I know it's used is to serve up secure notebooks, but I
bet its used elsewhere too. I see another option
4) Write our own hashlib using gnutls that gets installed if the SSL
one isn't made. Whether or not this is sufficient depends on how much
we use from it.
- Robert
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