Improve inject.sh

Now it can automatically download the original .ipa file. Plus some
improvements.

Author: michaelwright235

inject.sh

@@ -5,13 +5,15 @@
 ###
 
 ORIGINAL_IPA_NAME="original.ipa"
+ORIGINAL_IPA_SHA256="187253d4aa1c951af95957a49b926cfb7be4e953af578b6963fb4c7c9c0b6cb0"
+ORIGINAL_IPA_URL="https://archive.org/download/i-3-u-so-com.julienadam.cassius-1.04/I-3-U-SO-com.julienadam.cassius-1.04.ipa"
+ORIGINAL_ICON_URL="https://web.archive.org/web/20240111215624if_/https://is4-ssl.mzstatic.com/image/thumb/Purple/2b/df/56/mzi.rptjtlhi.png/738x0w.png"
 IPA_NAME="iloveusomuch.ipa"
 
 if [ "$1" == "project" ]; then
     OUT_DIR="./iloveusomuch/originalAssets"
 else
     OUT_DIR="./Payload/iloveusomuch.app"
-    mkdir -p $OUT_DIR
 fi
 
 zipPath="Payload/Cassius.app/"
@@ -22,8 +24,28 @@ zipFiles=(
 "${zipPath}Videos.m4v"
 )
 
+# Suggest downloading the original ipa file if it doesn't exit
 if ! [ -f "./$ORIGINAL_IPA_NAME" ]; then
-    echo "Please put the original .ipa file under the '$ORIGINAL_IPA_NAME' name first"
+    echo "The original.ipa file doesn't exist. This script can automatically download it from archive.org."
+    echo "Note: this file contains copyrighted materials that will be injected into the resulting app."
+    echo "\033[0;31m$(tput bold)You CANNOT distribute the resulting $IPA_NAME file in any way. For personal use only.$(tput sgr0)\033[0m"
+    while [ "$choice" != "n" ] && [ "$choice" != "y" ]; do
+        printf "Do you want to continue? [y/n]: "
+        read choice
+    done
+    if [ "$choice" == "n" ]; then
+        exit 0
+    fi
+    echo "Downloading the original app..."
+    curl -SLo "./$ORIGINAL_IPA_NAME" "$ORIGINAL_IPA_URL"
+    if ! [ $? = 0 ]; then
+        echo "Failed to download the original app"
+        exit 1
+    fi
+fi
+
+if [ "`openssl dgst -sha256 "./$ORIGINAL_IPA_NAME" | sed -E 's/SHA(2-)?256(.*)= //'`" != "$ORIGINAL_IPA_SHA256" ]; then
+    echo "$ORIGINAL_IPA_NAME has an unexpected checksum. Try downloading it again."
     exit 1
 fi
 
@@ -36,23 +58,29 @@ for file in ${zipFiles[@]}; do
     fi
 done
 
+if [ "$1" != "project" ]; then
+    mkdir -p "$OUT_DIR"
+fi
+
 # Create an argument for unzip to extract only these files
 zipFilesArg=""
 for file in ${zipFiles[@]}; do
     zipFilesArg="${zipFilesArg} ${file}"
 done
 
-unzip -j $ORIGINAL_IPA_NAME ${zipFilesArg} -d $OUT_DIR
+echo "Extracting original files..."
+unzip -j "$ORIGINAL_IPA_NAME" ${zipFilesArg} -d "$OUT_DIR" > /dev/null
 
 if ! [ $? = 0 ]; then
     echo "Failed to uncompress the archive"
     exit 1
-fi;
+fi
 
-mv $OUT_DIR/[email protected] $OUT_DIR/loader.png
+mv "$OUT_DIR/[email protected]" "$OUT_DIR/loader.png"
 
 # Download the original app icon from web.archive.org
-curl -o $OUT_DIR/AppIcon.png "https://web.archive.org/web/20240111215624if_/https://is4-ssl.mzstatic.com/image/thumb/Purple/2b/df/56/mzi.rptjtlhi.png/738x0w.png"
+echo "Downloading the original app icon..."
+curl -LsSo "$OUT_DIR/AppIcon.png" "$ORIGINAL_ICON_URL"
 if ! [ $? = 0 ]; then
     echo "Failed to download an app icon"
     exit 1
@@ -63,5 +91,8 @@ if [ "$1" == "project" ]; then
 fi
 
 # Inject files into a compiled .ipa
-zip -ru $IPA_NAME Payload
+echo "Injecting files into iloveusomuch.ipa..."
+zip -ru "$IPA_NAME" Payload > /dev/null
 rm -R ./Payload
+
+echo "\nIPA is ready!"