Add libminshacrypt static lib

This is a sha-only version of libmincrypt, to provide the new
SHA_hash implementation to binaries that require libcrypto_static
Add support for ECDSA P-256 with SHA256

This adds a small EC library that is capable of verifying a signature of
SHA256 with ECDSA on the NIST P-256 curve.

Change-Id: I2a16639c92a77e8e4783c47ffbc56676de56eb59
sdcard: Allow building as a static library

 * Split main() out in order to allow linking with a multi-call
   executable such as recovery.

Change-Id: I3325135e47e4dd5af3912f5ce67ec64007d54a63

Conflicts:
	sdcard/Android.mk
Small 4.4 fixes
sdcard: fix usage for -w and -s options

Change-Id: I0ef4299d2ccf99a18970f02d4bd4e7c28dc5335e
sdcard: Respect check_caller_access_to_name on readdir() calls

While looking at a blocked path failed as expected when trying
to access it with a stat(), read(), or getattr(), readdir() still
returned the entry, making devices with mounted external storage fail
com.android.cts.appsecurity.AppSecurityTests#testExternalStorageWrite
by trying to interact with otherwise invisible paths.

Fixit by skipping all entries that would've been made invisible at
LOOKUP

Change-Id: Ia8afac0703fa10f78c89046f029776bd290e4846
sdcard: Link to cutils and libc as DSOs

There's no reason to link this statically, especially since we're
building a shared binary anyway. Reduce binary size from 108k to 18k

Change-Id: I0622f039080fa088348570048314121ea4e14587
Parse IP address changes in NetlinkEvent.

This adds support for parsing RTM_NEWADDR and RTM_DELADDR
netlink messages received on netd's netlink socket and
formatting them them so NetlinkHandler can process them.

Address changes are notified in subsystem "address". Interface
changes, which used to be notified in subsystem "net", are now
notified in subsystem "interface" to avoid confusion.

Bug: 10232006
Change-Id: I93a50e8de17014e118a42f5cc0eb90a0cbfa73cc

Conflicts:
	libsysutils/src/NetlinkEvent.cpp
Get rid of an infinite loop in NetlinkEvent.cpp.

Bug: 10358527
Bug: 10263310
Bug: 10232006
Change-Id: I750e4bdf2000040adf214d6a772591d7bd25b350
Switch back to subsystem "net" for netlink events.

The change to enable address tracking via netlink incorrectly
changed the subsystem of rtnetlink events from "net" to
"interface". This broke interface add/delete notifications,
which come from the kernel with subsystem "net".

Switch back to "net" and deal with address tracking via new
action codes instead of a new subsystem.

Bug: 10433320
Change-Id: Ibf30efb426949dfd02304cc1d9adb1c005a539a6
libsysutils: Add iovec/runOnEachSocket

SocketClient:
* Replace sendDataLocked with sendDataLockedv which takes an iovec.
* Add a version of sendData, sendDatav, which takes an iovec.
* do not preserve iovec content through sendDatav

SocketListener:
* Add runOnEachSocket, which allows to to specify a SocketClientCommand to
  run individually on each socket. This allows you to do broadcast-like
  actions customized for each individual socket.
* Client safe list reference counting for sendBroadcast & runOnEach Socket

(cherry picked from commit a6e965578e44f8ae5f98de822ba5decec381d5fc)

Signed-off-by: Nick Kralevich <nnk@google.com>
Signed-off-by: Mark Salyzyn <salyzyn@google.com>

Change-Id: I716f89c01b4cb7af900045c7e41fac1492defb06

Conflicts:
	libsysutils/src/SocketClient.cpp
libsysutils: Get rid of warnings

- UNUSED argument warnings
- Remove LOG_NDEBUG define

(cherry picked from commit 696f267ff5a1e6227c2f5784dae60c190e0228b8)

Change-Id: I48b0942adfdb7a46a7693e580bc6ed5a685b0d5b
libsysutils: SocketListener export release

* Foreground thread (legacy) closes connection by
  reporting false return value for onDataAvailable.
* Background thread can choose instead to close the
  connection asynchronously by calling release, must
  return true for the onDataAvailable method.

(cherry picked from commit d7ad4e409eaac53db3a9789060097b712850b337)

Change-Id: I70ab37d5c22b02804aa3b4dfb26cc9b75291f8b6
libsysutil: frequent native crash /system/bin/vold

regression from commit a6e965578e44f9ae5f98de822ba5decec381dffc

* wrap writev with sigaction SIG_IGN SIGPIPE to emulate the
  send(,,,MSG_NOSIGNAL) call it had replaced.

(cherry pick from commit 83fc720785c4e40f3341daf7c0bf5ee99261fee9)

BUG: 12796279
Change-Id: I14363630ada79c0a5b85bb6b2afd0a1c4d5c3109