BIND 10 #936: Make libcryptolink compatible with botan 1.9 as well as 1.8

[BIND 10 Development]

#936: Make libcryptolink compatible with botan 1.9 as well as 1.8
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                   Reporter:  jelte  |                 Owner:  jreed
                       Type:         |                Status:  reviewing
  enhancement                        |             Milestone:
                   Priority:  major  |            Resolution:
                  Component:         |             Sensitive:  0
  Unclassified                       |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  0.0
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jreed):

 Replying to [comment:5 jelte]:

 > > - Do we need to report problem about 0 secret length?
 > >
 > > - Does it hurt to do that secret_len == 0 regardless of version?
 > >
 >
 > i'm not sure about either; on the one hand, at least the HMAC RFC does
 not really specify (it says 'secret can be of any length', and that might
 include 0 (though it then goes on to say to not use a short one). I don't
 know if the rest of our system would actually allow such secrets to be
 specified, but more importantly, if we do use 1.8 is will bail out on 0
 length, and i'm not sure we should change behaviour depending on de
 backend version. (and we could not make tests i think, 0 is the only
 'wrong' length, really)
 >


 Okay maybe you can add a comment about this in the code.

 You may merge to master. (I know you tested with 1.8 -- I didn't test with
 1.8 only 1.9.) Thanks.

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Ticket URL: <http://bind10.isc.org/ticket/936#comment:6>
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