1 files changed, 62 insertions, 0 deletions

diff --git a/vendor/github.com/minio/minio-go/v7/pkg/signer/utils.go b/vendor/github.com/minio/minio-go/v7/pkg/signer/utils.go
new file mode 100644
index 0000000..87c9939
--- /dev/null
+++ b/vendor/github.com/minio/minio-go/v7/pkg/signer/utils.go
@@ -0,0 +1,62 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2015-2017 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package signer
+
+import (
+        "crypto/hmac"
+        "crypto/sha256"
+        "net/http"
+        "strings"
+)
+
+// unsignedPayload - value to be set to X-Amz-Content-Sha256 header when
+const unsignedPayload = "UNSIGNED-PAYLOAD"
+
+// sum256 calculate sha256 sum for an input byte array.
+func sum256(data []byte) []byte {
+        hash := sha256.New()
+        hash.Write(data)
+        return hash.Sum(nil)
+}
+
+// sumHMAC calculate hmac between two input byte array.
+func sumHMAC(key, data []byte) []byte {
+        hash := hmac.New(sha256.New, key)
+        hash.Write(data)
+        return hash.Sum(nil)
+}
+
+// getHostAddr returns host header if available, otherwise returns host from URL
+func getHostAddr(req *http.Request) string {
+        host := req.Header.Get("host")
+        if host != "" && req.Host != host {
+                return host
+        }
+        if req.Host != "" {
+                return req.Host
+        }
+        return req.URL.Host
+}
+
+// Trim leading and trailing spaces and replace sequential spaces with one space, following Trimall()
+// in http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
+func signV4TrimAll(input string) string {
+        // Compress adjacent spaces (a space is determined by
+        // unicode.IsSpace() internally here) to one space and return
+        return strings.Join(strings.Fields(input), " ")
+}