diff --git a/python_api/assets/start_eufwupdater.sh b/python_api/assets/start_eufwupdater.sh
new file mode 100644
index 0000000..d848c0f
--- /dev/null
+++ b/python_api/assets/start_eufwupdater.sh
@@ -0,0 +1,128 @@
+#!/bin/sh
+
+# $1 update package
+# $2 output directory
+# $3 pub key to verify sig
+# $4 pri key to decrypt data key
+
+SIG_FILE="$2/sig.dat"
+AES256_KEY="$2/aes256.key"
+IV="$2/iv"
+
+ANIM_SIG_FILE="$2/anim_sig.dat"
+ANIM_PID=0
+
+
+epd_cmd()
+{
+  epd_fb_test $@ >/dev/null 2>&1
+}
+
+
+########################################
+# file header check
+########################################
+HEAD_MARK=`head -c 4 $1`
+if [ $HEAD_MARK != "DPUP" ]
+then
+  echo "Invalid file"
+  exit 0
+fi
+
+
+DATA_OFFSET=`dd if=$1 bs=4 skip=1 count=1 2>/dev/null | od -A n -t d4 -v`
+BODY_SIZE=`dd if=$1 bs=4 skip=2 count=1 2>/dev/null | od -A n -t d4 -v`
+########################################
+# start animation for package check
+########################################
+ANIM_HEADER_OFFSET=$(( $DATA_OFFSET + $BODY_SIZE ))
+if [ -z "$ANIM_HEADER_OFFSET" ]
+then
+  ANIM_HEADER_OFFSET=0
+fi
+ANIM_HEADER_SIZE=`dd if=$1 bs=1 skip=$ANIM_HEADER_OFFSET count=4 2>/dev/null | od -A n -t d4 -v`
+if [ -z "$ANIM_HEADER_SIZE" ]
+then
+  ANIM_HEADER_SIZE=0
+fi
+ANIM_ARCH_SIZE=`dd if=$1 bs=1 skip=$(($ANIM_HEADER_OFFSET + 4)) count=4 2>/dev/null | od -A n -t d4 -v`
+ANIM_SIG_SIZE=`dd if=$1 bs=1 skip=$(($ANIM_HEADER_OFFSET + 8)) count=4 2>/dev/null | od -A n -t d4 -v`
+dd if=$1 of=$ANIM_SIG_FILE bs=1 skip=$(($ANIM_HEADER_OFFSET + 12)) count=$(($ANIM_SIG_SIZE)) 2>/dev/null
+ANIM_ARCH_OFFSET=$(($ANIM_HEADER_OFFSET + $ANIM_HEADER_SIZE))
+dd if=$1 bs=$ANIM_ARCH_OFFSET skip=1 2>/dev/null | head -c $(($ANIM_ARCH_SIZE)) | openssl dgst -sha256 -verify $3 -signature $ANIM_SIG_FILE 1>/dev/null
+if [ $? -eq 0 ]
+then
+  start_prepare_animation.sh $1 $2 $ANIM_ARCH_OFFSET $(($ANIM_ARCH_SIZE)) &
+  ANIM_PID=$!
+fi
+
+
+
+########################################
+# extract sig
+########################################
+SIG_SIZE=`dd if=$1 bs=4 skip=4 count=1 2>/dev/null | od -A n -t d4 -v`
+dd if=$1 of=$SIG_FILE bs=1 skip=20 count=$(($SIG_SIZE)) 2>/dev/null
+
+
+########################################
+# verify sig
+########################################
+# dd if=$1 bs=$(($DATA_OFFSET)) skip=1 2>/dev/null | head -c $(($BODY_SIZE)) | openssl dgst -sha256 -verify $3 -signature $SIG_FILE 1>/dev/null
+#if [ $? -ne 0 ]
+#then
+#  echo "Verify failed."
+#  exit 0
+#fi
+
+
+########################################
+# decrypt data key
+########################################
+ENC_KEY_OFFSET=$((20 + $SIG_SIZE))
+PAD_SIZE=$((16 - $SIG_SIZE % 16 ))
+if [ $PAD_SIZE -ne 16 ]
+then
+  ENC_KEY_OFFSET=$(( $ENC_KEY_OFFSET + $PAD_SIZE ))
+fi
+
+ENC_KEY_SIZE=`dd if=$1 bs=1 skip=${ENC_KEY_OFFSET} count=4 2>/dev/null | od -A n -t d4 -v`
+ENC_KEY_OFFSET=$(( $ENC_KEY_OFFSET + 4 ))
+dd if=$1 bs=1 skip=${ENC_KEY_OFFSET} count=$(($ENC_KEY_SIZE)) 2>/dev/null | openssl rsautl -decrypt -inkey $4 > ${AES256_KEY}
+
+
+########################################
+# extract iv
+########################################
+IV_OFFSET=$(($ENC_KEY_OFFSET + $ENC_KEY_SIZE))
+dd if=$1 of=$IV bs=1 skip=${IV_OFFSET} count=32 2>/dev/null
+
+
+########################################
+# decrypt data and extract directory tree
+########################################
+dd if=$1 bs=$(($DATA_OFFSET)) skip=1 2>/dev/null | head -c $(($BODY_SIZE)) | openssl enc -d -aes-256-cbc -K `cat ${AES256_KEY}` -iv `cat ${IV}` | tar -xz -C $2
+
+
+########################################
+# stop animation for package check
+########################################
+if [ $ANIM_PID -ne 0 ]
+then
+  kill $ANIM_PID
+  epd_cmd gray DU PART 0
+  epd_cmd wait 300000
+fi
+
+
+########################################
+# start updater
+########################################
+if [ -f ${2}/FwUpdater/eufwupdater.sh ]
+then
+  ${2}/FwUpdater/eufwupdater.sh
+  exit $?	# tentative
+else
+  echo "Invalid archive (No updater script)."
+  exit 0
+fi
diff --git a/python_api/libInteractive.py b/python_api/libInteractive.py
index 95db8f0..9db80d3 100644
--- a/python_api/libInteractive.py
+++ b/python_api/libInteractive.py
@@ -50,6 +50,10 @@ def validate_required_files(dpt, purpose='diagnosis'):
             'python_api/assets/libsupol.so',
             'python_api/assets/install-recovery.sh'
         ]
+    elif purpose == 'eufwupdater':
+        requiredFiles = [
+            'python_api/assets/start_eufwupdater.sh'
+        ]
     else:
         requiredFiles = [
             'python_api/assets/shankerzhiwu_disableidcheck.pkg',
@@ -144,6 +148,7 @@ It behaves similarly to regular serial session with less flexibility (cannot use
 This mode intends to automate some complicated procedures.
 
 Supported commands:
+    `patch-updater-bash`-- patch the updater bash to bypass sig validation
     `push-file`         -- transfer file to DPT at 800bps (=100Bps)
     `pull-file`         -- transfer file from DPT
     `backup-bootimg`    -- backup the boot img and download it to local device
@@ -325,6 +330,25 @@ def diagnosis_push_file(
     return None
 
 
+def diagnosis_patch_eufwupdater(dpt):
+    '''
+    patch the start_eufwupdater.sh to bypass pkg check
+    '''
+    if not validate_required_files(dpt, purpose='eufwupdater'):
+        return False
+    bashfp = diagnosis_push_file(
+        dpt,
+        localfp='python_api/assets/start_eufwupdater.sh',
+        folder='/usr/local/bin',
+        overwrite=True)
+    if bashfp is None:
+        dpt.err_print("Failed to patch!!")
+        return False
+    dpt.diagnosis_set_perm(bashfp, owner='1496.1496', perm='0775')
+    dpt.info_print("Success!")
+    return True
+
+
 def diagnosis_backup_bootimg(dpt):
     '''
     backup boot img and then pull img from DPT to local disk
@@ -510,6 +534,9 @@ def diagnosis_cmd(dpt):
             elif cmd == 'help':
                 print_diagnosis_info()
                 continue
+            elif cmd =='patch-updater-bash':
+                diagnosis_patch_eufwupdater(dpt)
+                continue
             elif cmd == 'push-file':
                 diagnosis_push_file(dpt)
                 continue