Re: [patch] virt-convert add disk signature into virt-image format export

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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

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