From 253368a0726120efa57664cdd1d088af099a3d81 Mon Sep 17 00:00:00 2001
From: Ethan Yonker <dees_troy@teamw.in>
Date: Tue, 25 Nov 2014 15:00:52 -0600
Subject: Reduce libs needed for decrypt and clean up old decypt files

Trim cryptfs.c to remove functions that TWRP does not use for
decrypt and remove the need for libfs_mgr from cryptfs.c by
passing some items to cryptfs.c from the partition manager.

Add support for new fstab flags:
encryptable and forceencrypt=/path/to/cryptokey
For example:
flags=forceencrypt=/dev/block/platform/sdhci-tegra.3/by-name/MD1
Note that "footer" is the default, so you do not need to set this
flag on devices that use the footer for the crypto key.
Also add mounttodecrypt if you need to mount a partition during
the decrypt cycle for firmware of proprietary libs.

Clean up decrypt and only support one version

Android 5.0 lollipop decrypt should be backwards compatible with
older versions so we will only support one version, 1.3 that came
with 5.0 lollipop.

Remove support for Samsung TouchWiz decrypt. It does not work with
the latest versions of Samsung encryption anyway and it has not
been updated to work with any AOSP decryption higher than 1.1

Change-Id: I2d9c6e31df50268c91ee642c2fa090f901d9d5c9
---
 crypto/logwrapper/logwrapper.c | 96 ------------------------------------------
 1 file changed, 96 deletions(-)
 delete mode 100644 crypto/logwrapper/logwrapper.c

(limited to 'crypto/logwrapper/logwrapper.c')

diff --git a/crypto/logwrapper/logwrapper.c b/crypto/logwrapper/logwrapper.c
deleted file mode 100644
index d0d8d1471..000000000
--- a/crypto/logwrapper/logwrapper.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <logwrap/logwrap.h>
-#include <cutils/klog.h>
-
-#include "cutils/log.h"
-
-void fatal(const char *msg) {
-    fprintf(stderr, "%s", msg);
-    ALOG(LOG_ERROR, "logwrapper", "%s", msg);
-    exit(-1);
-}
-
-void usage() {
-    fatal(
-        "Usage: logwrapper [-a] [-d] [-k] BINARY [ARGS ...]\n"
-        "\n"
-        "Forks and executes BINARY ARGS, redirecting stdout and stderr to\n"
-        "the Android logging system. Tag is set to BINARY, priority is\n"
-        "always LOG_INFO.\n"
-        "\n"
-        "-a: Causes logwrapper to do abbreviated logging.\n"
-        "    This logs up to the first 4K and last 4K of the command\n"
-        "    being run, and logs the output when the command exits\n"
-        "-d: Causes logwrapper to SIGSEGV when BINARY terminates\n"
-        "    fault address is set to the status of wait()\n"
-        "-k: Causes logwrapper to log to the kernel log instead of\n"
-        "    the Android system log\n");
-}
-
-int main(int argc, char* argv[]) {
-    int seg_fault_on_exit = 0;
-    int log_target = LOG_ALOG;
-    bool abbreviated = false;
-    int ch;
-    int status = 0xAAAA;
-    int rc;
-
-    while ((ch = getopt(argc, argv, "adk")) != -1) {
-        switch (ch) {
-            case 'a':
-                abbreviated = true;
-                break;
-            case 'd':
-                seg_fault_on_exit = 1;
-                break;
-            case 'k':
-                log_target = LOG_KLOG;
-                klog_set_level(6);
-                break;
-            case '?':
-            default:
-              usage();
-        }
-    }
-    argc -= optind;
-    argv += optind;
-
-    if (argc < 1) {
-        usage();
-    }
-
-    rc = android_fork_execvp_ext(argc, &argv[0], &status, true,
-                                 log_target, abbreviated, NULL);
-    if (!rc) {
-        if (WIFEXITED(status))
-            rc = WEXITSTATUS(status);
-        else
-            rc = -ECHILD;
-    }
-
-    if (seg_fault_on_exit) {
-        *(int *)status = 0;  // causes SIGSEGV with fault_address = status
-    }
-
-    return rc;
-}
-- 
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