https://bugzilla.mindrot.org/show_bug.cgi?id=2786

Damien Miller <d...@mindrot.org> changed:

           What    |Removed                     |Added
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   Attachment #3062|0                           |1
        is obsolete|                            |
                 CC|                            |d...@mindrot.org
   Attachment #3128|                            |ok?
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--- Comment #1 from Damien Miller <d...@mindrot.org> ---
Created attachment 3128
  --> https://bugzilla.mindrot.org/attachment.cgi?id=3128&action=edit
refactor sshkey_read, allow more whitespace

IMO sshkey_read() needs a more comprehensive refactor since it's quite
crufty and internally inconsistent, especially in how it allowed tab
characters in some places and not others.

This moves the big switch statement to the start of the function; it
was previously used to select v1/v2 key parsing but now only functions
as a test of key->type. Moving it allows the the whole function to be
outdented.

It switches from strchr to strcspn to find spaces, and now accepts tabs
anywhere where whitespace is allowed.

Finally, it no longer modifies its argument during parsing but I'll
commit the flipping of its argument to const until later to avoid
colliding other in-progress diffs.

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