chore: import upstream snapshot with attribution

server/auth/random.go

@@ -0,0 +1,38 @@
+// Copyright 2024 Dolthub, 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 auth
+
+import (
+	crptorand "crypto/rand"
+	mathrand "math/rand"
+
+	"github.com/dolthub/doltgresql/server/auth/rfc5802"
+)
+
+// GenerateRandomOctetString generates an OctetString filled with random bytes.
+func GenerateRandomOctetString(length int) rfc5802.OctetString {
+	if length <= 0 {
+		return nil
+	}
+	str := make(rfc5802.OctetString, length)
+	_, err := crptorand.Read(str)
+	if err != nil {
+		// If crypto/rand errors for some reason, we'll use the non-cryptographic version since it will never error.
+		// Considering this is used for salts, etc. it is fine to use the non-cryptographic version. We still prefer
+		// the other though, this is just backup.
+		_, _ = mathrand.Read(str) //lint:ignore SA1019 Intentional usage
+	}
+	return str
+}