1 files changed, 37 insertions, 0 deletions
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/auth/metadata.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/auth/metadata.go
new file mode 100644
index 00000000..d386fcaf
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/auth/metadata.go
@@ -0,0 +1,37 @@
+// Copyright 2016 Michal Witkowski. All Rights Reserved.
+// See LICENSE for licensing terms.
+
+package grpc_auth
+
+import (
+	"context"
+	"strings"
+
+	"github.com/grpc-ecosystem/go-grpc-middleware/util/metautils"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+var (
+	headerAuthorize = "authorization"
+)
+
+// AuthFromMD is a helper function for extracting the :authorization header from the gRPC metadata of the request.
+//
+// It expects the `:authorization` header to be of a certain scheme (e.g. `basic`, `bearer`), in a
+// case-insensitive format (see rfc2617, sec 1.2). If no such authorization is found, or the token
+// is of wrong scheme, an error with gRPC status `Unauthenticated` is returned.
+func AuthFromMD(ctx context.Context, expectedScheme string) (string, error) {
+	val := metautils.ExtractIncoming(ctx).Get(headerAuthorize)
+	if val == "" {
+		return "", status.Errorf(codes.Unauthenticated, "Request unauthenticated with "+expectedScheme)
+	}
+	splits := strings.SplitN(val, " ", 2)
+	if len(splits) < 2 {
+		return "", status.Errorf(codes.Unauthenticated, "Bad authorization string")
+	}
+	if !strings.EqualFold(splits[0], expectedScheme) {
+		return "", status.Errorf(codes.Unauthenticated, "Request unauthenticated with "+expectedScheme)
+	}
+	return splits[1], nil
+}