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тАО02-20-2007 10:41 AM
тАО02-20-2007 10:41 AM
PKware doesn't sell PKzip for OVMS; does anyone have a license?
thanks
WCP
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тАО02-21-2007 05:10 AM
тАО02-21-2007 05:10 AM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
http://www.xlsoft.com/en/products/pkzip/pz_openvms.html
Do you have formal permission to do this?
Simply because a company discontinues or retires a product doesn't mean it necessarily reverts into the public domain, and it also doesn't necessarily mean that anybody can provide you with their license key, and it doesn't mean that somebody can reverse engineer and remove the license check(s).
With explicit written permission from the product owner of record allowing someone to reverse engineer the product, it's certainly feasible to disable most any copy protection or licensing scheme around. This reverse engineering really isn't usually all that technically difficult -- but this sort of electronic lock-smithing entirely hinges on having explicit permission of the owner.
If the vendor provides a compiler listing of the module containing the license check (and preferably with the machine code), the lock-smithing is easier.
Or the vendor can clear somebody (else) to provide you with a license key, or can potentially release or clear the release of a license key widely as has happened with a few (retired) products around, or can authorize somebody to issue a license key on behalf of the vendor.
Either of the above approaches -- getting a license key somehow, or cracking the security -- are entirely dependent on what the product owner explicitly authorizes.
The other approach is to use another encryption scheme, with or without compression. To not use pkzip, but something else. Current OpenVMS has AES, and earlier versions had DES. And there are lower-grade schemes around, as has been discussed. And there's reportedly an AES patch around for the current INFO-ZIP software. Reportedly compatible with pkzip, too.
Tere's a related recent thread: http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1091080
Stephen Hoffman
HoffmanLabs
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тАО02-21-2007 05:28 AM
тАО02-21-2007 05:28 AM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
Your point about using an alternate method is well taken. PKZIP is very weak security and we will replace it as soon as we have time. But for the next month or so we must use PKzip.
thanks
Clark Powell
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тАО02-21-2007 05:37 AM
тАО02-21-2007 05:37 AM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
PKZIP's weak encryption is weak. I'm told
that PKZIP's strong encryption is not weak.
If you're using only the old, original, weak
encryption of PKZIP, then I'd expect the
Info-ZIP Zip and UnZip programs to be useful
replacements for PKZIP. If you're using the
newer strong encryption, then the Info-ZIP
programs are unlikely to be helpful.
I believe that patches have been created to
allow the Info-ZIP programs to do
PKZIP-compatible AES, but there are potential
patent problems which need clarification
before such code is adopted by Info-ZIP.
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тАО02-21-2007 08:51 AM
тАО02-21-2007 08:51 AM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
As for the pkzip product, if the vendor explicitly clears it, the existing pkzip for OpenVMS can likely be cracked open either for your use, or for general use. This access based on just the existing binaries, assuming these are available. And this is with or without vendor assistance, so long as there are written agreements in place around cracking the existing licensing open.
And if pkzip used LMF, opening up access is easier. With the right mail messages and such to the right folks, a "new" LMF PAK can be generated for the package.
In deference to the ITRC and to other such, I'd expect most folks here are not going to discuss specifics of how to defeat licensing. Beyond the generic "it's feasible", that is. Nor would I expect folks here to blindly provide license keys, either.
Stephen Hoffman
HoffmanLabs
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тАО02-21-2007 09:26 AM
тАО02-21-2007 09:26 AM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
>>
Simply because a company discontinues or retires a product doesn't mean it necessarily reverts into the public domain, and it also doesn't necessarily mean that anybody can provide you with their license key,
<<
hits one of my hot spots. It *really* needs to be explored further legally by someone willing and able to do so.
Not that a product should revert to public domain, but that anytime a company stops selling and supporting and licensing a product, then that company has terminated its side of the license agreement. Licenses, like all contracts, are agreements between two parties; each with obligations to the other.
The producer, by ceasing sales, support and further licensing of the product, has denied expection of future profits from that product, and all such protection as granted by the license, is vacated. Any stated expectations about how the product should function are also now unsupported.
Copyrights, patents, trade secrets and other protections still apply, but the "right to use" license for a dead product should now defer to the "right of first use" laws.
Meaning, you should now be able to treat the product just like any other. You can sell or give away a book you buy or receive, but you can't reproduce or copy it or use its workings as your own.
In fact, a quick search shows that the right of first use for software is not a new concept, and not just for dead products.
BTW, the wording on a license or contract cannot supercede the law. That's why most have a statement like: "If any provision of this ... is held invalid, the remainder of this ... shall continue in full force and effect."
So, just because a license says something, that doesn't mean it's legal.
Like I said, I am not a lawyer, but a little research will show you that there's another side to this subject that you won't hear from the licensors.
Now, back to your regularly scheduled programming.
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тАО02-21-2007 06:58 PM
тАО02-21-2007 06:58 PM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
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тАО02-22-2007 07:07 AM
тАО02-22-2007 07:07 AM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
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тАО02-22-2007 07:58 AM
тАО02-22-2007 07:58 AM
Re: PKware doesn't sell PKzip for OVMS; does anyone have a license?
I'd still like to know if you're using
features which are missing from the Info-ZIP
programs, or if you have some other reason
for insisting on PKZIP.