[et-mgmt-tools] [patch] virt-convert add disk signature into virt-image format export

[Joey Boggs]

Here's an update, will this work best or any other suggestions?

            try:
                import hashlib
                m1 = hashlib.md5(path)
                m2 = hashlib.sha256(path)
            except:
                import md5
                m1 = md5.new(path)
                m2 = None

            f = open(path,"r")
            while 1:
                chunk = f.read(65536)
                if not chunk:
                    break
                m1.update(chunk)
                md5checksum = m1.hexdigest()

                if m2:
                   m2.update(chunk)
                   shachecksum = m2.hexdigest()
            storage.append("""   <checksum type="md5">%s</checksum>\n""" 
% md5checksum)
            if shachecksum:
                storage.append("""   <checksum 
type="sha256">%s</checksum>\n""" % shachecksum)
            storage.append("""   </disk>\n""")




Daniel P. Berrange wrote:
> On Wed, Oct 01, 2008 at 10:37:17AM -0400, Joey Boggs wrote:
>   
>> I'm done creating a sha256 hash setup should I offer more than just 
>> sha256for now? and checksum generation is off by default
>>
>> Here's a preview.  Not sure how to catch the module import failure for 
>> hashlib though
>>     
>
> If we go for doing a compulsory md5 checksum, and optional
> sha256 checksum with new enough python, then something
> like....
>
>     try:
>        import hashlib
>        m1 = hashlib.md5()
>        m2 = hashlib.sha256()
>     except:
>        import md5
>        m1 = md5.new()
>        m2 = None
>
>  
> Daniel
>