- 6.4.1 Keyring Plugin Installation
- 6.4.2 Using the keyring_file File-Based Plugin
- 6.4.3 Using the keyring_encrypted_file Keyring Plugin
- 6.4.4 Using the keyring_okv KMIP Plugin
- 6.4.5 Using the keyring_aws Amazon Web Services Keyring Plugin
- 6.4.6 Migrating Keys Between Keyring Keystores
- 6.4.7 Supported Keyring Key Types and Lengths
- 6.4.8 General-Purpose Keyring Key-Management Functions
- 6.4.9 Plugin-Specific Keyring Key-Management Functions
- 6.4.10 Keyring Command Options
- 6.4.11 Keyring System Variables
MySQL Server supports a keyring that enables internal server components and plugins to securely store sensitive information for later retrieval. The implementation is plugin-based:
keyring_fileplugin stores keyring data in a file local to the server host. This plugin is available in all MySQL distributions, Community Edition and Enterprise Edition included. See Section 6.4.2, “Using the keyring_file File-Based Plugin”.
keyring_encrypted_fileplugin stores keyring data in an encrypted file local to the server host. This plugin is available in MySQL Enterprise Edition distributions. See Section 6.4.3, “Using the keyring_encrypted_file Keyring Plugin”.
keyring_okvis a KMIP 1.1 plugin for use with KMIP-compatible back end keyring storage products such as Oracle Key Vault and Gemalto SafeNet KeySecure Appliance. This plugin is available in MySQL Enterprise Edition distributions. See Section 6.4.4, “Using the keyring_okv KMIP Plugin”.
keyring_awsplugin communicates with the Amazon Web Services Key Management Service for key generation and uses a local file for key storage. This plugin is available in MySQL Enterprise Edition distributions. See Section 6.4.5, “Using the keyring_aws Amazon Web Services Keyring Plugin”.
A MySQL server operational mode enables migration of keys between underlying keyring keystores. This enables DBAs to switch a MySQL installation from one keyring plugin to another. See Section 6.4.6, “Migrating Keys Between Keyring Keystores”.
An SQL interface for keyring key management is implemented as a set of user-defined functions (UDFs). See Section 6.4.8, “General-Purpose Keyring Key-Management Functions”.
In MySQL 8.0.16 and higher, the
keyring_keystable exposes metadata for keys in the keyring. Key metadata includes key IDs, key owners, and backend key IDs. The
keyring_keystable does not expose any sensitive keyring data such as key contents. See The keyring_keys table.
keyring_encrypted_file plugins for encryption
key management are not intended as a regulatory compliance
solution. Security standards such as PCI, FIPS, and others
require use of key management systems to secure, manage, and
protect encryption keys in key vaults or hardware security
Uses for the keyring within MySQL include:
InnoDBstorage engine uses the keyring to store its key for tablespace encryption.
InnoDBcan use any supported keyring plugin.
MySQL Enterprise Audit uses the keyring to store the audit log file encryption password. The audit log plugin can use any supported keyring plugin.
When binary log encryption has been activated for a MySQL server (by setting
binlog_encryption=ON), the binary log encryption keys used to encrypt the file passwords for the binary log files and relay log files are stored in the keyring. Any supported keyring plugin can be used to store binary log encryption keys. Binary log encryption keys are retained as long as there are files on the server that were encrypted using them. When the binary log master key is rotated manually, all binary log encryption keys that no longer apply to any retained binary log files or relay log files are cleared from the keyring. If a retained binary log file or relay log file cannot be initialized for re-encryption, the relevant binary log encryption keys are not deleted in case the files can be recovered in the future. For example, this might be the case if a file listed in a binary log index file is currently unreadable, or if a channel fails to initialize. For more information, see Encrypting Binary Log Files and Relay Log Files.
For general keyring installation instructions, see Section 6.4.1, “Keyring Plugin Installation”. For information specific to a given keyring plugin, see the section describing that plugin.
For information about using the keyring UDFs, see Section 6.4.8, “General-Purpose Keyring Key-Management Functions”.
Keyring plugins and UDFs access a keyring service that provides the interface for server components to the keyring. For information about accessing the keyring plugin service and writing keyring plugins, see The Keyring Service, and Writing Keyring Plugins.