From 1e378c8506712c224737eb0488bb7416689889c9 Mon Sep 17 00:00:00 2001
From: LukeZGD <26163116+LukeZGD@users.noreply.github.com>
Date: Thu, 28 Jul 2022 13:41:50 +0800
Subject: [PATCH] Use shasum on macOS only, use sha1sum on others

---
 resources/depends.sh   | 9 +++++----
 resources/downgrade.sh | 2 +-
 resources/ipsw.sh      | 4 ++--
 restore.sh             | 1 +
 4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/resources/depends.sh b/resources/depends.sh
index b30992c..0f791db 100755
--- a/resources/depends.sh
+++ b/resources/depends.sh
@@ -41,7 +41,6 @@ SetToolPaths() {
         ipwnder32="./resources/tools/ipwnder32_macos"
         ipwnder_lite="./resources/tools/ipwnder_macos"
         python="/usr/bin/python"
-        xmlstarlet=/
         zenity="./resources/tools/zenity_macos"
 
     elif [[ $OSTYPE == "msys" ]]; then
@@ -71,6 +70,7 @@ SetToolPaths() {
     powdersn0w="../resources/tools/powdersn0w_$platform"
     pwnedDFU="./resources/tools/pwnedDFU_$platform"
     rmsigchks="$python rmsigchks.py"
+    sha1sum="$(which sha1sum 2>/dev/null)"
     SimpleHTTPServer="$python -m SimpleHTTPServer 8888"
     SSH="-F ./resources/ssh_config"
     SCP="$(which scp) $SSH"
@@ -87,8 +87,9 @@ SetToolPaths() {
         fi
 
     elif [[ $platform == "macos" ]]; then
-        # for macOS 12 and newer
+        sha1sum="$(which shasum)"
         if (( ${platformver:0:2} > 11 )); then
+            # for macOS 12 and newer
             python="/usr/bin/python3"
             ipwndfu="$(which python2) ipwndfu"
             rmsigchks="$(which python2) rmsigchks.py"
@@ -129,7 +130,7 @@ SaveExternal() {
 SaveFile() {
     Log "Downloading $2..."
     curl -L $1 -o $2
-    local SHA1=$(shasum $2 | awk '{print $1}')
+    local SHA1=$($sha1sum $2 | awk '{print $1}')
     if [[ $SHA1 != $3 ]]; then
         Error "Verifying $2 failed. The downloaded file may be corrupted or incomplete. Please run the script again" \
         "SHA1sum mismatch. Expected $3, got $SHA1"
@@ -175,7 +176,7 @@ InstallDepends() {
 
     elif [[ $ID == "fedora" ]] && (( VERSION_ID >= 36 )); then
         ln -sf /usr/lib64/libbz2.so.1.* ../resources/lib/libbz2.so.1.0
-        sudo dnf install -y bsdiff ca-certificates expect libimobiledevice openssl perl-Digest-SHA python2 systemd udev usbmuxd vim-common xmlstarlet zenity
+        sudo dnf install -y bsdiff ca-certificates expect libimobiledevice openssl python2 systemd udev usbmuxd vim-common xmlstarlet zenity
         sudo ln -sf /etc/pki/tls/certs/ca-bundle.crt /etc/pki/tls/certs/ca-certificates.crt
 
     elif [[ $ID == "opensuse-tumbleweed" || $PRETTY_NAME == *"Leap 15.4" ]]; then
diff --git a/resources/downgrade.sh b/resources/downgrade.sh
index da78db2..ee10675 100755
--- a/resources/downgrade.sh
+++ b/resources/downgrade.sh
@@ -20,7 +20,7 @@ FRBaseband() {
         BuildManifest="saved/$ProductType/BuildManifest.plist"
     fi
 
-    BasebandSHA1L=$(shasum saved/baseband/$Baseband | awk '{print $1}')
+    BasebandSHA1L=$($sha1sum saved/baseband/$Baseband | awk '{print $1}')
     if [[ ! -e $(ls saved/baseband/$Baseband) || $BasebandSHA1L != $BasebandSHA1 ]]; then
         rm -f saved/baseband/$Baseband saved/$ProductType/BuildManifest.plist
         if [[ $DeviceProc == 7 ]]; then
diff --git a/resources/ipsw.sh b/resources/ipsw.sh
index f553e0a..a9de670 100755
--- a/resources/ipsw.sh
+++ b/resources/ipsw.sh
@@ -93,7 +93,7 @@ JailbreakFiles() {
     local JBSHA1L
     if [[ -e resources/jailbreak/$2 ]]; then
         Log "Verifying $2..."
-        JBSHA1L=$(shasum resources/jailbreak/$2 | awk '{print $1}')
+        JBSHA1L=$($sha1sum resources/jailbreak/$2 | awk '{print $1}')
         if [[ $JBSHA1L == $3 ]]; then
             return
         fi
@@ -136,7 +136,7 @@ IPSWFindVerify() {
     Log "Verifying $IPSWDL.ipsw..."
     IPSWSHA1=$(cat $Firmware/$BuildVerDL/sha1sum)
     Log "Expected SHA1sum: $IPSWSHA1"
-    IPSWSHA1L=$(shasum $IPSWDL.ipsw | awk '{print $1}')
+    IPSWSHA1L=$($sha1sum $IPSWDL.ipsw | awk '{print $1}')
     Log "Actual SHA1sum:   $IPSWSHA1L"
     if [[ $IPSWSHA1L != $IPSWSHA1 ]]; then
         Error "Verifying IPSW failed. Your IPSW may be corrupted or incomplete. Delete/replace the IPSW and run the script again" \
diff --git a/restore.sh b/restore.sh
index 4b05963..275bc07 100755
--- a/restore.sh
+++ b/restore.sh
@@ -86,6 +86,7 @@ Main() {
         Echo "Version: $(cat resources/git_hash)"
     else
         Echo "Version: Unknown"
+        Echo "* I recommend downloading iOS-OTA-Downgrader from the GitHub releases page"
     fi
 
     SetToolPaths