ssh: add hmac-sha2-512.

golang · Aug 23, 2016 · 2f7b6a2 · 2f7b6a2
1 parent b35ccbc
commit 2f7b6a2
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/ssh/common.go b/ssh/common.go
@@ -56,7 +56,7 @@ var supportedHostKeyAlgos = []string{
 // This is based on RFC 4253, section 6.4, but with hmac-md5 variants removed
 // because they have reached the end of their useful life.
 var supportedMACs = []string{
-	"hmac-sha2-256", "hmac-sha1", "hmac-sha1-96",
+	"hmac-sha2-512", "hmac-sha2-256", "hmac-sha1", "hmac-sha1-96",
 }
 
 var supportedCompressions = []string{compressionNone}

diff --git a/ssh/mac.go b/ssh/mac.go
@@ -10,6 +10,7 @@ import (
 	"crypto/hmac"
 	"crypto/sha1"
 	"crypto/sha256"
+	"crypto/sha512"
 	"hash"
 )
 
@@ -45,6 +46,9 @@ func (t truncatingMAC) Size() int {
 func (t truncatingMAC) BlockSize() int { return t.hmac.BlockSize() }
 
 var macModes = map[string]*macMode{
+	"hmac-sha2-512": {64, func(key []byte) hash.Hash {
+		return hmac.New(sha512.New, key)
+	}},
 	"hmac-sha2-256": {32, func(key []byte) hash.Hash {
 		return hmac.New(sha256.New, key)
 	}},