SQL Server

Create JWK Set Containing Certificates

See more Certificates Examples

Demonstrates how to create a JWK Set containing N certificates. SQL Server

-- 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)
    DECLARE @success int
    SELECT @success = 0

    -- This example creates the following JWK Set from two certificates:

    -- {
    --   "keys": [
    --     {
    --       "kty": "RSA",
    --       "use": "sig",
    --       "kid": "BB8CeFVqyaGrGNuehJIiL4dfjzw",
    --       "x5t": "BB8CeFVqyaGrGNuehJIiL4dfjzw",
    --       "n": "nYf1jpn7cFdQ...9Iw",
    --       "e": "AQAB",
    --       "x5c": [
    --         "MIIDBTCCAe2...Z+NTZo"
    --       ]
    --     },
    --     {
    --       "kty": "RSA",
    --       "use": "sig",
    --       "kid": "M6pX7RHoraLsprfJeRCjSxuURhc",
    --       "x5t": "M6pX7RHoraLsprfJeRCjSxuURhc",
    --       "n": "xHScZMPo8F...EO4QQ",
    --       "e": "AQAB",
    --       "x5c": [
    --         "MIIC8TCCAdmgA...Vt5432GA=="
    --       ]
    --     }
    --   ]
    -- }

    -- First get two certificates from files.
    DECLARE @cert1 int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert1 OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @cert1, 'LoadFromFile', @success OUT, 'qa_data/certs/brasil_cert.pem'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @cert1
        RETURN
      END

    DECLARE @cert2 int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert2 OUT

    EXEC sp_OAMethod @cert2, 'LoadFromFile', @success OUT, 'qa_data/certs/testCert.cer'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @cert1
        EXEC @hr = sp_OADestroy @cert2
        RETURN
      END

    -- We'll need this crypt object re-encode the SHA1 thumbprint from hex to base64.
    DECLARE @crypt int
    EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    -- Let's begin with the 1st cert:
    EXEC sp_OASetProperty @json, 'I', 0
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].kty', 'RSA'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].use', 'sig'

    DECLARE @hexThumbprint nvarchar(4000)
    EXEC sp_OAGetProperty @cert1, 'Sha1Thumbprint', @hexThumbprint OUT
    DECLARE @base64Thumbprint nvarchar(4000)
    EXEC sp_OAMethod @crypt, 'ReEncode', @base64Thumbprint OUT, @hexThumbprint, 'hex', 'base64'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].kid', @base64Thumbprint
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].x5t', @base64Thumbprint

    -- (We're assuming these are RSA certificates)
    -- To get the modulus (n) and exponent (e), we need to get the cert's public key and then get its JWK.
    DECLARE @pubKey int
    EXEC @hr = sp_OACreate 'Chilkat.PublicKey', @pubKey OUT

    EXEC sp_OAMethod @cert1, 'GetPublicKey', @success OUT, @pubKey

    DECLARE @pubKeyJwk int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @pubKeyJwk OUT

    EXEC sp_OAMethod @pubKey, 'GetJwk', @sTmp0 OUT
    EXEC sp_OAMethod @pubKeyJwk, 'Load', @success OUT, @sTmp0
    EXEC sp_OAMethod @pubKeyJwk, 'StringOf', @sTmp0 OUT, 'n'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].n', @sTmp0
    EXEC sp_OAMethod @pubKeyJwk, 'StringOf', @sTmp0 OUT, 'e'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].e', @sTmp0

    -- Now add the entire X.509 certificate 
    EXEC sp_OAMethod @cert1, 'GetEncoded', @sTmp0 OUT
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].x5c[0]', @sTmp0

    -- Now do the same for cert2..
    EXEC sp_OASetProperty @json, 'I', 1

    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].kty', 'RSA'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].use', 'sig'

    EXEC sp_OAGetProperty @cert2, 'Sha1Thumbprint', @hexThumbprint OUT
    EXEC sp_OAMethod @crypt, 'ReEncode', @base64Thumbprint OUT, @hexThumbprint, 'hex', 'base64'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].kid', @base64Thumbprint
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].x5t', @base64Thumbprint
    EXEC sp_OAMethod @cert2, 'GetPublicKey', @success OUT, @pubKey

    EXEC sp_OAMethod @pubKey, 'GetJwk', @sTmp0 OUT
    EXEC sp_OAMethod @pubKeyJwk, 'Load', @success OUT, @sTmp0
    EXEC sp_OAMethod @pubKeyJwk, 'StringOf', @sTmp0 OUT, 'n'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].n', @sTmp0
    EXEC sp_OAMethod @pubKeyJwk, 'StringOf', @sTmp0 OUT, 'e'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].e', @sTmp0

    -- Now add the entire X.509 certificate 
    EXEC sp_OAMethod @cert2, 'GetEncoded', @sTmp0 OUT
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'keys[i].x5c[0]', @sTmp0

    -- Emit the JSON..
    EXEC sp_OASetProperty @json, 'EmitCompact', 0
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    EXEC @hr = sp_OADestroy @cert1
    EXEC @hr = sp_OADestroy @cert2
    EXEC @hr = sp_OADestroy @crypt
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @pubKey
    EXEC @hr = sp_OADestroy @pubKeyJwk


END
GO