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crypto

Cryptographic hash functions and HMAC

Extension repository on GitHub 11 Extension descriptor (YAML) Weekly downloads 🔽 188

Installing and Loading 

INSTALL crypto FROM community;
LOAD crypto;

Example 

-- Calculate the MD5 hash value of 'abcdef'
SELECT crypto_hash('md5', 'abcdef');
┌──────────────────────────────────┐
│   crypto_hash('md5', 'abcdef')   │
│             varchar              │
├──────────────────────────────────┤
│ e80b5017098950fc58aad83c8c14978e │
└──────────────────────────────────┘

-- Calculate a HMAC
SELECT crypto_hmac('sha2-256', 'secret key', 'secret message');
┌──────────────────────────────────────────────────────────────────┐
│     crypto_hmac('sha2-256', 'secret key', 'secret message')      │
│                             varchar                              │
├──────────────────────────────────────────────────────────────────┤
│ 2df792e08cefdc0ea9900c67c93cbe66b98231b829a5dccd3857a03baac35963 │
└──────────────────────────────────────────────────────────────────┘

About crypto

crypto provides two functions:

  • crypto_hash applies cryptographically secure hash functions and returns the result as a hex encoded value.

  • crypto_hmac calculates the HMAC using a secret key and a specific hash function.

The supported hash functions are:

  • blake2b-512
  • keccak224
  • keccak256
  • keccak384
  • keccak512
  • md4
  • md5
  • sha1
  • sha2-224
  • sha2-256
  • sha2-384
  • sha2-512
  • sha3-224
  • sha3-256
  • sha3-384
  • sha3-512

Added Functions

function_name function_type description comment example
crypto_hash scalar Apply a cryptographic hash function specified as the first argument to the data supplied as the second argument.   SELECT crypto_hash('md5', 'test');
crypto_hmac scalar Calculate a HMAC value   SELECT crypto_hmac('sha2-256', 'secret key', 'secret message');