Restructure codebase move crypto, checksum to top-level, move `split` into donut, move crypto/keys into api/auth

pkg/server/api/auth/keys/common.go

@@ -0,0 +1,45 @@
+/*
+ * Minimalist Object 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 keys
+
+import "regexp"
+
+// AccessID and SecretID length in bytes
+const (
+	MinioAccessID = 20
+	MinioSecretID = 40
+)
+
+/// helpers
+
+// IsValidSecretKey - validate secret key
+func IsValidSecretKey(secretAccessKey string) bool {
+	if secretAccessKey == "" {
+		return true
+	}
+	regex := regexp.MustCompile("^.{40}$")
+	return regex.MatchString(secretAccessKey)
+}
+
+// IsValidAccessKey - validate access key
+func IsValidAccessKey(accessKeyID string) bool {
+	if accessKeyID == "" {
+		return true
+	}
+	regex := regexp.MustCompile("^[A-Z0-9\\-\\.\\_\\~]{20}$")
+	return regex.MatchString(accessKeyID)
+}