Simon Wilkinson 07b3e6fd74 Allow zero-length encrypt IOVs in _krb5_evp_encrypt_iov_cts()
The iovec encryption code doesn't handle 0 length iovecs correctly.
Instead of just skipping them, _krb5_evp_encrypt_iov_cts() will spin
on the 0 length iovec.

Modify the _krb5_evp_iov_cursor_expand helper so that iovec expansion
simply skips 0 length iovecs, and make _krb5_evp_iov_cursor_nextcrypt
do the same.

Original bug report and tests from Andrew Bartlett <abartlet@samba.org>
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Heimdal

Heimdal is a Kerberos 5 implementation.

For information how to install see here.

There are man pages for most of the commands.

Bug reports and bugs are appreciated. Use GitHub issues or send e-mail to heimdal-bugs@h5l.org.

For more information see the project homepage https://www.h5l.org/ or the mailing lists:

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