upgrade go-dkim

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/oragono/go-ident v0.0.0-20200511222032-830550b1d775
 	github.com/stretchr/testify v1.4.0 // indirect
 	github.com/tidwall/buntdb v1.1.4
-	github.com/toorop/go-dkim v0.0.0-20200526084421-76378ae5207e
+	github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208
 	golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a
 	golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f // indirect
 	golang.org/x/text v0.3.3

go.sum

@@ -68,6 +68,8 @@ github.com/tidwall/tinyqueue v0.0.0-20180302190814-1e39f5511563 h1:Otn9S136ELckZ
 github.com/tidwall/tinyqueue v0.0.0-20180302190814-1e39f5511563/go.mod h1:mLqSmt7Dv/CNneF2wfcChfN1rvapyQr01LGKnKex0DQ=
 github.com/toorop/go-dkim v0.0.0-20200526084421-76378ae5207e h1:uZTp+hhFm+PCH0t0Px5oE+QYlVTwVJ+XKNQr7ct4Q7w=
 github.com/toorop/go-dkim v0.0.0-20200526084421-76378ae5207e/go.mod h1:BzWtXXrXzZUvMacR0oF/fbDDgUPO8L36tDMmRAf14ns=
+github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208 h1:PM5hJF7HVfNWmCjMdEfbuOBNXSVF2cMFGgQTPdKCbwM=
+github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208/go.mod h1:BzWtXXrXzZUvMacR0oF/fbDDgUPO8L36tDMmRAf14ns=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073 h1:xMPOj6Pz6UipU1wXLkrtqpHbR0AVFnyPEQq/wRWz9lM=
 golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=

vendor/github.com/toorop/go-dkim/dkim.go

@@ -100,6 +100,7 @@ func NewSigOptions() SigOptions {
 // Sign signs an email
 func Sign(email *[]byte, options SigOptions) error {
 	var privateKey *rsa.PrivateKey
+	var err error
 
 	// PrivateKey
 	if len(options.PrivateKey) == 0 {
@@ -109,11 +110,17 @@ func Sign(email *[]byte, options SigOptions) error {
 	if d == nil {
 		return ErrCandNotParsePrivateKey
 	}
-	key, err := x509.ParsePKCS1PrivateKey(d.Bytes)
-	if err != nil {
-		return ErrCandNotParsePrivateKey
+
+	// try to parse it as PKCS1 otherwise try PKCS8
+	if key, err := x509.ParsePKCS1PrivateKey(d.Bytes); err != nil {
+		if key, err := x509.ParsePKCS8PrivateKey(d.Bytes); err != nil {
+			return ErrCandNotParsePrivateKey
+		} else {
+			privateKey = key.(*rsa.PrivateKey)
+		}
+	} else {
+		privateKey = key
 	}
-	privateKey = key
 
 	// Domain required
 	if options.Domain == "" {

vendor/modules.txt

@@ -55,7 +55,7 @@ github.com/tidwall/rtree
 github.com/tidwall/rtree/base
 # github.com/tidwall/tinyqueue v0.0.0-20180302190814-1e39f5511563
 github.com/tidwall/tinyqueue
-# github.com/toorop/go-dkim v0.0.0-20200526084421-76378ae5207e
+# github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208
 ## explicit
 github.com/toorop/go-dkim
 # golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a