Add new Chrome OS key type: Salted SHA256

chromeos/login/auth/key.cc

Index: chromeos/login/auth/key.cc
diff --git a/chromeos/login/auth/key.cc b/chromeos/login/auth/key.cc
index 02733531240edae5b8be37d2c03d00658e8540bc..01c3bcf1ffc89a03b21dc468d4b66b1374a4e01c 100644
--- a/chromeos/login/auth/key.cc
+++ b/chromeos/login/auth/key.cc
@@ -100,6 +100,10 @@ void Key::Transform(KeyType target_key_type, const std::string& salt) {
       base::Base64Encode(raw_secret, &secret_);
       break;
     }
+    case KEY_TYPE_SALTED_SHA256:
+      base::Base64Encode(crypto::SHA256HashString(salt + secret_), &secret_);
+      break;
+
     default:
       // The resulting key will be sent to cryptohomed. It should always be
       // hashed. If hashing fails, crash instead of sending a plain-text key.