This topic describes the encryption functions and compression functions. Some functions are not supported by DRDS.

Supported encryption functions and compression functions

The following table describes the encryption functions and compression functions that are supported by DRDS.

Function Description
AES_ENCRYPT() Encrypt using AES
MD5() Calculate MD5 checksum
UNCOMPRESS() Uncompress a string compressed
UNCOMPRESSED_LENGTH() Return the length of a string before compression

Unsupported encryption functions and compression functions

The following table describes the encryption functions and compression functions that are not supported by DRDS. These functions are supported by databases that run on the MySQL 5.7 engine.

Function Description
AES_DECRYPT() Decrypt using AES
AES_ENCRYPT() Encrypt using AES
ASYMMETRIC_DECRYPT() Decrypt ciphertext using private or public key
ASYMMETRIC_DERIVE() Derive symmetric key from asymmetric keys
ASYMMETRIC_ENCRYPT() Encrypt cleartext using private or public key
ASYMMETRIC_SIGN() Generate signature from digest
ASYMMETRIC_VERIFY() Verify that signature matches digest
CREATE_ASYMMETRIC_PRIV_KEY() Create private key
CREATE_ASYMMETRIC_PUB_KEY() Create public key
CREATE_DH_PARAMETERS() Generate shared DH secret
CREATE_DIGEST() Generate digest from string
DECODE() (deprecated 5.7.2) Decodes a string encrypted using ENCODE()
DES_DECRYPT() (deprecated 5.7.6) Decrypt a string
DES_ENCRYPT() (deprecated 5.7.6) Encrypt a string
ENCODE() (deprecated 5.7.2) Encode a string
ENCRYPT() (deprecated 5.7.6) Encrypt a string
OLD_PASSWORD() Return the value of the pre-4.1 implementation of PASSWORD
PASSWORD() (deprecated 5.7.6) Calculate and return a password string
RANDOM_BYTES() Return a random byte vector
SHA1(), SHA() Calculate an SHA-1 160-bit checksum
SHA2() Calculate an SHA-2 checksum
VALIDATE_PASSWORD_STRENGTH() Determine strength of password