(SQL Server) Get Google API Access Token using P12 Service Account Key

Demonstrates how to get a Google API access token using a P12 service account key.

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 requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    -- --------------------------------------------------------------------------------
    -- For a step-by-step guide for setting up your Google Workspace service account,
    -- see Setup Google Workspace Account for Sending SMTP GMail from a Service Account
    -- --------------------------------------------------------------------------------

    -- First load the PKCS12 (.p12 / .pfx) into a PFX object.
    DECLARE @pfx int
    EXEC @hr = sp_OACreate 'Chilkat.Pfx', @pfx OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @pfx, 'LoadPfxFile', @success OUT, 'qa_data/pfx/chilkat25-cbd7b42afbd8.p12', 'notasecret'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @pfx, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pfx
        RETURN
      END

    DECLARE @gAuth int
    EXEC @hr = sp_OACreate 'Chilkat.AuthGoogle', @gAuth OUT

    EXEC sp_OAMethod @gAuth, 'SetP12', @success OUT, @pfx

    -- The ISS is your service account email address ending in gserviceaccount.com.
    DECLARE @iss nvarchar(4000)
    SELECT @iss = 'chilkatsvc@chilkat25.iam.gserviceaccount.com'

    -- The scope is always the following string:
    DECLARE @scope nvarchar(4000)
    SELECT @scope = 'https://mail.google.com/'

    -- The sub is your company email address
    DECLARE @oauth_sub nvarchar(4000)
    SELECT @oauth_sub = 'info@chilkat.xyz'

    -- The access token is valid for this number of seconds.
    DECLARE @numSec int
    SELECT @numSec = 3600

    EXEC sp_OASetProperty @gAuth, 'EmailAddress', @iss
    EXEC sp_OASetProperty @gAuth, 'Scope', @scope
    EXEC sp_OASetProperty @gAuth, 'ExpireNumSeconds', @numSec
    EXEC sp_OASetProperty @gAuth, 'SubEmailAddress', @oauth_sub

    -- Connect to www.googleapis.com
    DECLARE @tlsSock int
    EXEC @hr = sp_OACreate 'Chilkat.Socket', @tlsSock OUT

    EXEC sp_OAMethod @tlsSock, 'Connect', @success OUT, 'www.googleapis.com', 443, 1, 5000
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @tlsSock, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pfx
        EXEC @hr = sp_OADestroy @gAuth
        EXEC @hr = sp_OADestroy @tlsSock
        RETURN
      END

    -- Send the request to obtain the access token.
    EXEC sp_OAMethod @gAuth, 'ObtainAccessToken', @success OUT, @tlsSock
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @gAuth, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pfx
        EXEC @hr = sp_OADestroy @gAuth
        EXEC @hr = sp_OADestroy @tlsSock
        RETURN
      END

    -- Examine the access token:

    EXEC sp_OAGetProperty @gAuth, 'AccessToken', @sTmp0 OUT
    PRINT 'Access Token: ' + @sTmp0

    EXEC @hr = sp_OADestroy @pfx
    EXEC @hr = sp_OADestroy @gAuth
    EXEC @hr = sp_OADestroy @tlsSock


END
GO