(SQL Server) Generate an Ed25519 Key Pair

Demonstrates how to generate a new Ed25519 public/private key pair.

Note: This example requires Chilkat v9.5.0.83 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @eddsa int
    -- Use "Chilkat_9_5_0.EdDSA" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.EdDSA', @eddsa OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @prng int
    -- Use "Chilkat_9_5_0.Prng" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Prng', @prng OUT

    DECLARE @privKey int
    -- Use "Chilkat_9_5_0.PrivateKey" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @privKey OUT

    -- Generates a new eddsa key and stores it in privKey.
    DECLARE @success int
    EXEC sp_OAMethod @eddsa, 'GenEd25519Key', @success OUT, @prng, @privKey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @eddsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @eddsa
        EXEC @hr = sp_OADestroy @prng
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    -- Examine the ed25519 key in JWK format;
    DECLARE @jwk nvarchar(4000)
    EXEC sp_OAMethod @privKey, 'GetJwk', @jwk OUT

    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OAMethod @json, 'Load', @success OUT, @jwk
    EXEC sp_OASetProperty @json, 'EmitCompact', 0
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- Sample output:
    -- {
    --   "kty": "OKP",
    --   "crv": "Ed25519",
    --   "x": "SE2Kne5xt51z1eciMH2T2ftDQp96Gl6FhY6zSQujiP0",
    --   "d": "O-eRXewadF0sNyB0U9omcnt8Qg2ZmeK3WSXPYgqe570",
    --   "use": "sig"
    -- }

    -- In the above JWK, x is the public key, y is the private key.
    -- Both are 32 bytes and are base64-url encoded.

    EXEC @hr = sp_OADestroy @eddsa
    EXEC @hr = sp_OADestroy @prng
    EXEC @hr = sp_OADestroy @privKey
    EXEC @hr = sp_OADestroy @json


END
GO