MD5

Hashes the given string or binary data using the message digest algorithm, version 5.

MD5 has been strongly deprecated as a means of securely signing data, given the multiple weaknesses discovered in the algorithm.

It is present in SingleStore mainly for backwards compatibility and for systems which require a "good enough" hashing function and can tolerate collisions. For a more secure hash function, see SHA2.

Note

MD5 is disabled when FIPS mode is enabled (via the ssl_fips_mode engine variable).

A warning is generated when MD5 is used:

SELECT MD5('a');
ERROR 2535 (HY000): SSL fips mode error: FIPS mode ON: MD5 digest is not supported.
SHOW WARNINGS;
+---------+------+------------------------------------------------------------------------+
| Level   | Code | Message                                                                |
+---------+------+------------------------------------------------------------------------+
| Warning | 2535 | SSL FIPS mode error: FIPS mode ON/STRICT: MD5 digest is not supported. |
+---------+------+------------------------------------------------------------------------+

Syntax

MD5(plaintext)

Arguments

  • plaintext: the data to hash.

Return Type

32 lower case hexadecimal digits corresponding to the 128-bit binary hash value.

Examples

SELECT MD5('ohai');
+----------------------------------+
| MD5('ohai')                      |
+----------------------------------+
| 5a73678b7b674005056434a48054707d |
+----------------------------------+

Last modified: May 3, 2023

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