detect and stop on BIP38 EC Multiply variant

Author: neocogent

scripts/bip38scan

@@ -86,6 +86,10 @@ if len(sys.argv) < 3:
     print "Usage: %s <token file> <BIP38 encoded key>\n" % sys.argv[0]
     sys.exit(0)
 
+hexkey = "0"+b58hex(sys.argv[2])
+if hexkey[0:2] != '0142':
+    sys.exit('BIP38 Third-party key (EC Multiply flag) not supported.')
+        
 with open(sys.argv[1]) as f:
     tokens = f.read()
 tokens = tokens.split()

scripts/bip38scanx

@@ -107,6 +107,10 @@ if __name__ == '__main__':
         print "Default depth is 6. ie. scan up to 6 token combinations."
         print "Usage: %s <token file> <BIP38 encoded key> [depth]\n" % sys.argv[0]
         sys.exit(0)
+        
+    hexkey = "0"+b58hex(sys.argv[2])
+    if hexkey[0:2] != '0142':
+        sys.exit('BIP38 Third-party key (EC Multiply flag) not supported.')
 
     with open(sys.argv[1]) as f:
         tokens = f.read()