1 files changed, 39 insertions, 0 deletions
diff --git a/vendor/github.com/minio/minio-go/pkg/s3signer/utils.go b/vendor/github.com/minio/minio-go/pkg/s3signer/utils.go
new file mode 100644
index 000000000..0619b3082
--- /dev/null
+++ b/vendor/github.com/minio/minio-go/pkg/s3signer/utils.go
@@ -0,0 +1,39 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 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 s3signer
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+)
+
+// 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 []byte, data []byte) []byte {
+	hash := hmac.New(sha256.New, key)
+	hash.Write(data)
+	return hash.Sum(nil)
+}