Encryption Function

MD5

MD5(string)

The MD5 function returns the MD5 128-bit checksum for the input character string. The result value is displayed as a character string that is expressed in 32 hexadecimals, which you can use to create hash keys, for example.

Parameters:

string – Input string. If a value that is not a VARCHAR type is entered, it will be converted to VARCHAR.

Return type:

STRING

The return value is a VARCHAR (32) type and if an input parameter is NULL, NULL will be returned.

SELECT MD5('cubrid');

   md5('cubrid')
======================
  '685c62385ce717a04f909047d0a55a16'

SELECT MD5(255);

   md5(255)
======================
  'fe131d7f5a6b38b23cc967316c13dae2'

SELECT MD5('01/01/2010');

   md5('01/01/2010')
======================
  '4a2f373c30426a1b8e9cf002ef0d4a58'

SELECT MD5(CAST('2010-01-01' as DATE));

   md5( cast('2010-01-01' as date))
======================
  '4a2f373c30426a1b8e9cf002ef0d4a58'

SHA1

SHA1(string)

The SHA1 function calculates an SHA-1 160-bit checksum for the string, as described in RFC 3174 (Secure Hash Algorithm).

Parameters:

string – target string to be encrypted

Return type:

STRING

The value is returned as a string of 40 hex digits, or NULL if the argument is NULL.

SELECT SHA1('cubrid');

      sha1('cubrid')
======================
  '0562A8E9C814E660F5FFEB0DAC739ABFBBB1CB69'

SHA2

SHA2(string, hash_length)

The SHA2 function calculates the SHA-2 family of hash functions (SHA-224, SHA-256, SHA-384, and SHA-512). The first argument is the cleartext string to be hashed. The second argument indicates the desired bit length of the result, which must have a value of 224, 256, 384, 512, or 0 (which is equivalent to 256).

Parameters:

string – target string to be encrypted

Return type:

STRING

If either argument is NULL or the hash length is not one of the permitted values, the return value is NULL. Otherwise, the function result is a hash value containing the desired number of bits.

SELECT SHA2('cubrid', 256);

   sha2('cubrid', 256)
======================
  'D14DA17F2C492114F4A57D9F7BED908FD3A351B40CD59F0F79413687E4CA85A5'

SELECT SHA2('cubrid', 224);

   sha2('cubrid', 224)
======================
  '8E5E18B5B47646C31CCEA98A87B19CBEF084036716FBD13D723AC9B2'