/**
 * Secure credential storage with encryption at rest.
 *
 * Provides secure storage of passwords and other sensitive credentials
 * using AES-GCM encryption with PBKDF2 key derivation.
 *
 * Features:
 * - Encrypts credentials at rest using AES-256-GCM
 * - Uses PBKDF2 for key derivation from master password
 * - Secure wiping of sensitive data
 * - Thread-safe operations
 * - Protection against timing attacks
 */

 *  * BER: Basic Encoding Rules.
 *
 * This class was implemented according to the [X.690 spec][[x690]], and under the advice of
 * [Lets Encrypt's ASN.1 and DER][asn1_and_der] guide.
 *
 * [x690]: https://www.itu.int/rec/T-REC-X.690
 * [asn1_and_der]: https://letsencrypt.org/docs/a-warm-welcome-to-asn1-and-der/
 */
internal class DerReader(
  source: Source,

func (ssekms) IsEncrypted(metadata map[string]string) bool {
	if _, ok := metadata[MetaSealedKeyKMS]; ok {
		return true
	}
	return false
}

// UnsealObjectKey extracts and decrypts the sealed object key
// from the metadata using KMS and returns the decrypted object
// key.
func (s3 ssekms) UnsealObjectKey(k *kms.KMS, metadata map[string]string, bucket, object string) (key ObjectKey, err error) {

	}
	return parse(v[0], strict)
}

// Equal returns true if and only if the two ETags are
// identical.
func Equal(a, b ETag) bool { return bytes.Equal(a, b) }

// Decrypt decrypts the ETag with the given key.
//
// If the ETag is not encrypted, Decrypt returns
// the ETag unmodified.
func Decrypt(key []byte, etag ETag) (ETag, error) {
	const HMACContext = "SSE-etag"

		return nil, err
	}
	config.drivercache[tierName] = d
	return d, nil
}

// configReader returns a PutObjReader and ObjectOptions needed to save config
// using a PutObject API. PutObjReader encrypts json encoded tier configurations
// if KMS is enabled, otherwise simply yields the json encoded bytes as is.
// Similarly, ObjectOptions value depends on KMS' status.

	if req.Name == "" {
		req.Name = k.DefaultKey
	}

	start := time.Now()
	dek, err := k.conn.GenerateKey(ctx, req)
	k.updateMetrics(err, time.Since(start))

	return dek, err
}

// Decrypt decrypts a ciphertext using the master key req.Name.
// It returns ErrKeyNotFound if the key does not exist.
func (k *KMS) Decrypt(ctx context.Context, req *DecryptRequest) ([]byte, error) {
	start := time.Now()

MinIO stores all its config as part of the server deployment, config is erasure coded on MinIO. On a fresh deployment MinIO automatically generates a new `config` and this config is available to be configured via `mc admin config` command. MinIO also encrypts all the config, IAM and policies content if KMS is configured. Please refer to how to encrypt your config and IAM credentials [here](https://github.com/minio/minio/blob/master/docs/kms/IAM.md).

### Certificate Directory

			if opts.EncryptFn != nil {
				fi.Checksum = opts.EncryptFn("object-checksum", fi.Checksum)
			}
		}
	} else if fi.Checksum == nil && opts.WantChecksum != nil {
		// Trailing headers checksums should now be filled.
		fi.Checksum = opts.WantChecksum.AppendTo(nil, nil)
		if opts.EncryptFn != nil {
			fi.Checksum = opts.EncryptFn("object-checksum", fi.Checksum)
		}
	}

		UserDefined:                srcInfo.UserDefined,
		Versioned:                  dstOpts.Versioned,
		VersionID:                  dstOpts.VersionID,
		MTime:                      dstOpts.MTime,
		EncryptFn:                  dstOpts.EncryptFn,
		WantChecksum:               dstOpts.WantChecksum,
		WantServerSideChecksumType: dstOpts.WantServerSideChecksumType,
	}

			if err != nil {
				writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
				return
			}

			if idxCb != nil {
				idxCb = compressionIndexEncrypter(objectEncryptionKey, idxCb)
			}
			opts.EncryptFn = metadataEncrypter(objectEncryptionKey)
		}
	}
	opts.IndexCB = idxCb

	opts.ReplicationRequest = sourceReplReq
	putObjectPart := objectAPI.PutObjectPart