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johnr
Joined: 13 Apr 2006
Posts: 5
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 Posted: Fri Mar 21, 2008 9:59 pm Post subject: Different sized activation codes being generated |
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With the latest version of ILS (3.7.2), I'm getting different lengths of activation codes generated based on different lengths of usernames (productinfo).
My method call is as follows:
licensing.GenerateKey(7,password,regname, true,TextEncoding.Hex,serialNo)
I've tracked it to the payload size is being calculated from the productinfo + the clientData + the checksum lengths.
the encPayload size is calculated from the payload size + the password data size.
because the payload size is based on the product info, the actual data byte array varies in size creating different sized activation codes based on the users name.
Older versions did not do this previously.
Is this a known issue?
If you need more information, please let me know.
Thank you,
John R |
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Infralution
Joined: 28 Feb 2005
Posts: 5027
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| Posted: Sat Mar 22, 2008 12:15 am Post subject: |
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| Quote: | because the payload size is based on the product info, the actual data byte array varies in size creating different sized activation codes based on the users name.
Older versions did not do this previously.
Is this a known issue? |
This has always been the case. Because the ProductInfo is encrypted into the license key - the larger the ProductInfo the longer the key will be. Because the encryption algorithms use 8 byte blocks the key length grows in 8 byte blocks. This topic from Mar 2006 provides more detail:
Product Info characters => Hex digits = bytes
0-5 => 32 hex digits = 16 bytes
6-13 => 48 hex digits = 24 bytes
14-21 => 64 hex digits = 32 bytes
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Infralution Support |
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johnr
Joined: 13 Apr 2006
Posts: 5
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| Posted: Sat Mar 22, 2008 4:13 am Post subject: |
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My fault. I just realized my mistake was that with my new program I was passing in the username as the productinfo whereas with my old program I was getting the checksum of the username and using that. I've updated the new program and everything is back to normal.
Thanks,
John |
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