Make arithemetic operations overflow safe (#41)

NOTICE

@@ -1,8 +1,7 @@
 This product includes software developed at MinIO, Inc.
 (https://min.io/).
 
-The Boundary MinIO Plugin contains unmodified
-subcomponents of the Minio madmin-go library v1.7.5
+The Boundary MinIO Plugin contains subcomponents of the Minio madmin-go library v1.7.5
 (https://github.com/minio/madmin-go/tree/v1.7.5),
 licensed under the Apache License 2.0.
 

madmin/encrypt.go

@@ -80,7 +80,8 @@ func EncryptData(password string, data []byte) ([]byte, error) {
 	nonce := sioutil.MustRandom(stream.NonceSize())
 
 	// ciphertext = salt || AEAD ID | nonce | encrypted data
-	cLen := int64(len(salt)+1+len(nonce)+len(data)) + stream.Overhead(int64(len(data)))
+	// cLen calculation: Modified by Hashicorp in 2026 to make arithmetic operations overflow-safe by casting to int64 before addition
+	cLen := int64(len(salt)) + 1 + int64(len(nonce)) + int64(len(data)) + stream.Overhead(int64(len(data)))
 	ciphertext := bytes.NewBuffer(make([]byte, 0, cLen)) // pre-alloc correct length
 
 	// Prefix the ciphertext with salt, AEAD ID and nonce