Import heimdal-7.8.0 (previous was 7.7.0)

This release includes both the Heimdal 7.7.1 Security Vulnerability
fixes and non-Security bug fixes/improvements.

Security Vulnerabilities:
- CVE-2022-42898 PAC parse integer overflows
- CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour
- CVE-2022-41916 Fix Unicode normalization read of 1 bytes past end of array
- CVE-2021-44758 A null pointer de-reference DoS in SPNEGO acceptors
- CVE-2021-3671 A null pointer de-reference when handling missing sname
in TGS-REQ
- CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec
Note that CVE-2022-44640 is a severe vulnerability, possibly a 10.0
on the Common Vulnerability Scoring System (CVSS) v3, as we believe
it should be possible to get an RCE on a KDC, which means that
credentials can be compromised that can be used to impersonate
anyone in a realm or forest of realms.

Heimdal's ASN.1 compiler generates code that allows specially
crafted DER encodings of CHOICEs to invoke the wrong free function
on the decoded structure upon decode error. This is known to impact
the Heimdal KDC, leading to an invalid free() of an address partly
or wholly under the control of the attacker, in turn leading to a
potential remote code execution (RCE) vulnerability.

This error affects the DER codec for all extensible CHOICE types
used in Heimdal, though not all cases will be exploitable. We have
not completed a thorough analysis of all the Heimdal components
affected, thus the Kerberos client, the X.509 library, and other
parts, may be affected as well.

This bug has been in Heimdal's ASN.1 compiler since 2005, but it may
only affect Heimdal 1.6 and up. It was first reported by Douglas
Bagnall, though it had been found independently by the Heimdal
maintainers via fuzzing a few weeks earlier.

While no zero-day exploit is known, such an exploit will likely be
available soon after public disclosure.
- CVE-2019-14870: Validate client attributes in protocol-transition
- CVE-2019-14870: Apply forwardable policy in protocol-transition
- CVE-2019-14870: Always lookup impersonate client in DB

Other changes:
- Bugs found by UBSAN (including the incorrect encoding of unconstrained
INTEGER value -1).
- Errors found by the LLVM scan-build static analyzer.
- Errors found by the valgrind memory debugger.
- Work around GCC Bug 95189 (memcmp wrongly stripped like strcmp).
- Correct ASN.1 OID typo for SHA-384
- Fix a deadlock in in the MEMORY ccache type.
- TGS: strip forwardable and proxiable flags if the server is
disallowed.
- CVE-2019-14870: Validate client attributes in protocol-transition
- CVE-2019-14870: Apply forwardable policy in protocol-transition
- CVE-2019-14870: Always lookup impersonate client in DB
- Incremental HDB propagation improvements
Refactor send_diffs making it progressive
Handle partial writes on non-blocking sockets
Disable Nagle in iprop master and slave
Use async I/O
Don't send I_HAVE in response to AYT
Do not recover log in kadm5_get_principal()
Don't send diffs to slaves with not yet known version
Don't stutter in send_diffs
- Optional backwards-compatible anon-pkinit behavior

Import latest heimdal-1-5-branch from git

Ok'ed + reviewed by elric@

branches: 1.1.1.2.4; 1.1.1.2.6; 1.1.1.2.10; 1.1.1.2.12; 1.1.1.2.20; 1.1.1.2.22;
Reimport Heimdal dist converted into NetBSD dist format. The prior
import did not catch all of the $Id$ tags because many of them are
unexpanded and the RE was only looking for expanded keywords.

Import latest Heimdal from the head of their git repository into the
new location for externally maintained software.

branches: 1.1.1;
Initial revision

Import latest heimdal-1-5-branch from git

Ok'ed + reviewed by elric@

branches: 1.1.1.2.4; 1.1.1.2.10; 1.1.1.2.22;
Reimport Heimdal dist converted into NetBSD dist format. The prior
import did not catch all of the $Id$ tags because many of them are
unexpanded and the RE was only looking for expanded keywords.

Import latest Heimdal from the head of their git repository into the
new location for externally maintained software.

Rebase.

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")