Implemented signing both RSA and Ed25519, updated TODO. Required creation of SelectorEd25519 option.

TODO

@@ -1,11 +1,11 @@
 TODO
 
 0.9.1 (Alpha)
-Sign rsa/ed25519
+Sign rsa/ed25519    implemented
 Verify rsa/ed25519  implemented
 Domain              implemented
 KeyFile             implemented
-KeyFileEd25519
+KeyFileEd25519      implemented
 Mode                implemented
 PidFile             implemented     verified
 Selector            implemented
@@ -51,6 +51,7 @@ FixCRLF
 KeepAuthResults
 KeepTemporaryFiles
 KeyTable
+KeytableEd25519
 LogResults
 LogWhy
 MaximumHeaders

dkimpy-milter.conf.5

@@ -310,7 +310,7 @@ containing the process ID.
 
 .TP
 .I Selector (string)
-Defines the name of the selector to be used when signing messages.
+Defines the name of the selector to be used when signing messages using RSA.
 See the
 .B DKIM
 specification for details.  Used only when signing with a single key;
@@ -322,6 +322,20 @@ This parameter is ignored if a
 .I KeyTable
 is defined. [KeyTable NOT IMPLEMENTED]
 
+.TP
+.I SelectorEd25519 (string)
+Defines the name of the selector to be used when signing messages using Ed25519.
+See the
+.B DKIM
+specification for details.  Used only when signing with a single key;
+see the
+.I SigningTable
+parameter below for more information.
+
+This parameter is ignored if a
+.I KeyTableEd25519
+is defined. [KeyTable NOT IMPLEMENTED]
+
 .TP
 .I Socket (string)
 Specifies the socket that should be established by the filter to receive

dkimpy_milter/__init__.py

@@ -176,6 +176,12 @@ class dkimMilter(Milter.Base):
                 canonicalize=('relaxed','simple'))
         name,val = h.split(': ',1)
         self.addheader(name,val.strip().replace('\r\n','\n'),0)
+        if conf.get('KeyFileEd25519'):
+            d = dkim.DKIM(txt)
+            h = d.sign(conf.get('SelectorEd25519'),conf.get('Domain'),conf.get('KeyFileEd25519'),
+                    canonicalize=('relaxed','simple'))
+            name,val = h.split(': ',1)
+            self.addheader(name,val.strip().replace('\r\n','\n'),0)
       except dkim.DKIMException as x:
           if milterconfig.get('Syslog'):
               syslog.syslog('DKIM: %s'%x)