Changed bitrpc.py's raw_input to getpass for passwords to conceal characters during command line input. Getpass is in Python stdlib so no additional dependencies required.

contrib/bitrpc/bitrpc.py

@@ -1,6 +1,7 @@
 from jsonrpc import ServiceProxy
 import sys
 import string
+import getpass
 
 # ===== BEGIN USER SETTINGS =====
 # if you do not set these you will be prompted for a password for every command
@@ -302,7 +303,7 @@ elif cmd == "validateaddress":
 
 elif cmd == "walletpassphrase":
     try:
-        pwd = raw_input("Enter wallet passphrase: ")
+        pwd = getpass.getpass(prompt="Enter wallet passphrase: ")
         access.walletpassphrase(pwd, 60)
         print "\n---Wallet unlocked---\n"
     except:
@@ -310,8 +311,8 @@ elif cmd == "walletpassphrase":
 
 elif cmd == "walletpassphrasechange":
     try:
-        pwd = raw_input("Enter old wallet passphrase: ")
-        pwd2 = raw_input("Enter new wallet passphrase: ")
+        pwd = getpass.getpass(prompt="Enter old wallet passphrase: ")
+        pwd2 = getpass.getpass(prompt="Enter new wallet passphrase: ")
         access.walletpassphrasechange(pwd, pwd2)
         print
         print "\n---Passphrase changed---\n"