diff --git a/db_transfer.py b/db_transfer.py
index 0da6fe4..7ed02c4 100644
--- a/db_transfer.py
+++ b/db_transfer.py
@@ -250,8 +250,9 @@ class MuJsonTransfer(DbTransfer):
 
 		if rows:
 			output = json.dumps(rows, sort_keys=True, indent=4, separators=(',', ': '))
-			with open(config_path, 'w') as f:
+			with open(config_path, 'r+') as f:
 				f.write(output)
+				f.truncate()
 
 	def pull_db_all_user(self):
 		import json
diff --git a/mujson_mgr.py b/mujson_mgr.py
index ff99ac2..741c44c 100644
--- a/mujson_mgr.py
+++ b/mujson_mgr.py
@@ -2,7 +2,7 @@
 # -*- coding: UTF-8 -*-
 
 import traceback
-from shadowsocks import shell
+from shadowsocks import shell, common
 from configloader import load_config, get_config
 import random
 import getopt
@@ -21,8 +21,9 @@ class MuJsonLoader(object):
 	def save(self, path):
 		if self.json:
 			output = json.dumps(self.json, sort_keys=True, indent=4, separators=(',', ': '))
-			with open(path, 'w') as f:
+			with open(path, 'r+') as f:
 				f.write(output)
+				f.truncate()
 
 class MuMgr(object):
 	def __init__(self):
@@ -35,8 +36,8 @@ class MuMgr(object):
 		obfs = user.get('obfs', '')
 		protocol = protocol.replace("_compatible", "")
 		obfs = obfs.replace("_compatible", "")
-		link = "%s:%s:%s:%s:%s:%s" % (self.server_addr, user['port'], protocol, user['method'], obfs, base64.urlsafe_b64encode(user['passwd']))
-		return "ssr://" + base64.urlsafe_b64encode(link)
+		link = "%s:%s:%s:%s:%s:%s" % (self.server_addr, user['port'], protocol, user['method'], obfs, common.to_str(base64.urlsafe_b64encode(common.to_bytes(user['passwd']))))
+		return "ssr://" + common.to_str(base64.urlsafe_b64encode(common.to_bytes(link)))
 
 	def userinfo(self, user):
 		ret = ""
diff --git a/shadowsocks/crypto/rc4_md5.py b/shadowsocks/crypto/rc4_md5.py
index 1f07a82..b0105ec 100644
--- a/shadowsocks/crypto/rc4_md5.py
+++ b/shadowsocks/crypto/rc4_md5.py
@@ -35,6 +35,7 @@ def create_cipher(alg, key, iv, op, key_as_bytes=0, d=None, salt=None,
 
 ciphers = {
     'rc4-md5': (16, 16, create_cipher),
+    'rc4-md5-6': (16, 6, create_cipher),
 }
 
 
diff --git a/shadowsocks/encrypt_test.py b/shadowsocks/encrypt_test.py
index 0121d63..d5e5077 100644
--- a/shadowsocks/encrypt_test.py
+++ b/shadowsocks/encrypt_test.py
@@ -12,6 +12,18 @@ from shadowsocks.crypto import openssl
 from shadowsocks.crypto import sodium
 from shadowsocks.crypto import table
 
+def run(func):
+	try:
+		func()
+	except:
+		pass
+
+def run_n(func, name):
+	try:
+		func(name)
+	except:
+		pass
+
 def main():
 	print("\n""rc4_md5")
 	rc4_md5.test()
@@ -19,14 +31,20 @@ def main():
 	openssl.test_aes_256_cfb()
 	print("\n""aes-128-cfb")
 	openssl.test_aes_128_cfb()
-	print("\n""rc4")
-	openssl.test_rc4()
+	print("\n""bf-cfb")
+	run(openssl.test_bf_cfb)
+	print("\n""camellia-128-cfb")
+	run_n(openssl.run_method, "camellia-128-cfb")
+	print("\n""cast5-cfb")
+	run_n(openssl.run_method, "cast5-cfb")
+	print("\n""idea-cfb")
+	run_n(openssl.run_method, "idea-cfb")
+	print("\n""seed-cfb")
+	run_n(openssl.run_method, "seed-cfb")
 	print("\n""salsa20")
-	sodium.test_salsa20()
+	run(sodium.test_salsa20)
 	print("\n""chacha20")
-	sodium.test_chacha20()
-	print("\n""table")
-	table.test_encryption()
+	run(sodium.test_chacha20)
 
 if __name__ == '__main__':
 	main()