Ethereum wallet passwords

- A password is now generated for each privkey in Ethereum key-address list
  - As with Monero wallet passwords (df03851), password is first 16 bytes of
    SHA256x2(privkey)
  - Password can be used with geth's private.importRawKey() method to create a
    relatively secure online wallet.  Unlock using private.unlockAccount()

mmgen/addr.py

@@ -85,6 +85,10 @@ class AddrGeneratorEthereum(AddrGenerator):
 		import sha3
 		return CoinAddr(sha3.keccak_256(pubhex[2:].decode('hex')).digest()[12:].encode('hex'))
 
+	def to_wallet_passwd(self,sk_hex):
+		from mmgen.protocol import hash256
+		return WalletPassword(hash256(sk_hex)[:32])
+
 	def to_segwit_redeem_script(self,pubhex):
 		raise NotImplementedError,'Segwit redeem script not supported by this address type'
 

mmgen/obj.py

@@ -739,6 +739,8 @@ class MMGenAddrType(str,Hilite,InitErrors,MMGenObject):
 				'compressed':False,
 				'gen_method':'ethereum',
 				'addr_fmt':'ethereum',
+				'wif_label':'privkey:',
+				'extra_attrs': ('wallet_passwd',),
 				'desc':'Ethereum address' },
 		'Z': {  'name':'zcash_z',
 				'pubkey_type':'zcash_z',

test/test.py

@@ -541,8 +541,8 @@ cfgs = {
 		'ref_keyaddrfile_chksum_zec_z': '6B87 9B2D 0D8D 8D1E',
 		'ref_keyaddrfile_chksum_xmr': 'E0D7 9612 3D67 404A',
 		'ref_keyaddrfile_chksum_dash': 'E83D 2C63 FEA2 4142',
-		'ref_keyaddrfile_chksum_eth': '3635 4DCF B752 8772',
-		'ref_keyaddrfile_chksum_etc': '9BAC 38E7 5C8E 42E0',
+		'ref_keyaddrfile_chksum_eth': 'E400 70D9 0AE3 C7C2',
+		'ref_keyaddrfile_chksum_etc': 'EF49 967D BD6C FE45',
 		'ref_passwdfile_chksum':   'A983 DAB9 5514 27FB',
 #		'ref_fake_unspent_data':'98831F3A_unspent.json',
 		'ref_tx_file': {