Encryption Function¶
Contents
MD5¶
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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')
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'685c62385ce717a04f909047d0a55a16'
SELECT MD5(255);
md5(255)
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'fe131d7f5a6b38b23cc967316c13dae2'
SELECT MD5('01/01/2010');
md5('01/01/2010')
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'4a2f373c30426a1b8e9cf002ef0d4a58'
SELECT MD5(CAST('2010-01-01' as DATE));
md5( cast('2010-01-01' as date))
======================
'4a2f373c30426a1b8e9cf002ef0d4a58'
SHA1¶
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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')
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'0562A8E9C814E660F5FFEB0DAC739ABFBBB1CB69'
SHA2¶
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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)
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'D14DA17F2C492114F4A57D9F7BED908FD3A351B40CD59F0F79413687E4CA85A5'
SELECT SHA2('cubrid', 224);
sha2('cubrid', 224)
======================
'8E5E18B5B47646C31CCEA98A87B19CBEF084036716FBD13D723AC9B2'