simon-git: putty (master): Simon Tatham

[Commits to Tartarus CVS repository.]

TL;DR:
  dee305c Fix mpint signedness bug in importing PEM ECDSA keys.

Repository:     git://git.tartarus.org/simon/putty.git
On the web:     http://tartarus.org/~simon-git/gitweb/?p=putty.git
Branch updated: master
Committer:      Simon Tatham <anakin at pobox.com>
Date:           2015-05-15 14:04:30

commit dee305c318fa9b9f2213032dfaf0ccd4c220f16d
web diff http://tartarus.org/~simon-git/gitweb/?p=putty.git;a=commitdiff;h=dee305c318fa9b9f2213032dfaf0ccd4c220f16d;hp=8dab2c24404b6f14ffb9472799d7621077a73bd6
Author: Simon Tatham <anakin at pobox.com>
Date:   Fri May 15 14:01:35 2015 +0100

    Fix mpint signedness bug in importing PEM ECDSA keys.
    
    The OpenSSH PEM format contains a big integer with the top bit
    potentially set, which we handle by copying the data into a faked up
    instance of our own private key format, and passing that to
    ecdsa_createkey(). But our own private key format expects an SSH-2
    standard mpint, i.e. with the top bit reliably clear, so this might
    fail for no good reason.
    
    Fixed by prefixing a zero byte unconditionally when constructing the
    fake private blob.

 import.c |   16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)