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(SQL Server) Send a Signed Email using RSASSA-PSS with SHA256

Demonstrates how to sign and send an email using the RSASSA-PSS signing algorithm with the SHA256 hash algorithm.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    --  This example requires the Chilkat Email API to have been previously unlocked.
    --  See Unlock Chilkat MailMan for sample code.

    --  Get a digital certificate with private key from a .pfx
    --  (Chilkat has many different ways to provide a cert + private key for siging.
    --  Using a PFX is just one possible option.)
    DECLARE @pfx int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.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/rsassa-pss/privatekey.pfx', 'PFX_PASSWORD'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @pfx, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pfx
        RETURN
      END

    DECLARE @email int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Email', @email OUT

    --  Create a simple email.
    EXEC sp_OASetProperty @email, 'Subject', 'Sample RSASSA-PSS Signed Email'
    EXEC sp_OASetProperty @email, 'Body', 'Sample RSASSA-PSS Signed Email'
    EXEC sp_OASetProperty @email, 'From', 'from_name@mydomain.com'
    --  Add one ore more recipients..
    EXEC sp_OAMethod @email, 'AddTo', @success OUT, 'Chilkat Support', 'support@chilkatsoft.com'
    EXEC sp_OAMethod @email, 'AddTo', @success OUT, 'Chilkat GMail', 'chilkat.support@gmail.com'

    --  Indicate that the email is to be signed, and that we want to use RSASSA-PSS.
    EXEC sp_OASetProperty @email, 'SendSigned', 1
    EXEC sp_OASetProperty @email, 'SigningAlg', 'pss'
    EXEC sp_OASetProperty @email, 'SigningHashAlg', 'sha256'

    --  Get the certificate to be used for signing.
    --  (The typical case for a PFX is that it contains a cert with an associated private key,
    --  as well as other certificates in the chain of authentication.  The cert with the private
    --  key should be in the first position at index 0.)
    DECLARE @cert int
    EXEC sp_OAMethod @pfx, 'GetCert', @cert OUT, 0
    EXEC sp_OAGetProperty @pfx, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @pfx, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pfx
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    --  Tell the email object to use this cert (and private key) for signing.
    EXEC sp_OAMethod @email, 'SetSigningCert', @success OUT, @cert
    EXEC @hr = sp_OADestroy @cert

    DECLARE @mailman int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.MailMan', @mailman OUT

    --  Set the SMTP settings for your email account on your mail server.
    EXEC sp_OASetProperty @mailman, 'SmtpUsername', 'SMTP_LOGIN'
    EXEC sp_OASetProperty @mailman, 'SmtpPassword', 'SMTP_PASSWORD'
    EXEC sp_OASetProperty @mailman, 'SmtpHost', 'MY_SMTP_DOMAIN_OR_IP'
    EXEC sp_OASetProperty @mailman, 'SmtpPort', 587
    EXEC sp_OASetProperty @mailman, 'StartTLS', 1

    --  Send the email.  The mailman will sign the email as directed by the
    --  property settings of the email object.
    EXEC sp_OAMethod @mailman, 'SendEmail', @success OUT, @email
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pfx
        EXEC @hr = sp_OADestroy @email
        EXEC @hr = sp_OADestroy @mailman
        RETURN
      END

    EXEC sp_OAMethod @mailman, 'CloseSmtpConnection', @success OUT
    IF @success <> 1
      BEGIN

        PRINT 'Connection to SMTP server not closed cleanly.'
      END


    PRINT 'Mail Sent!'

    --  -----------------------------------------------------------
    --  This is the MIME of the RSASSA-PSS signed email that was sent

    --  	MIME-Version: 1.0
    --  	Date: Thu, 20 Apr 2017 10:14:58 -0500
    --  	Message-ID: <3682A87344CB3A4FB5EB5BC9908C0C4DA01DA461@CHILKAT13>
    --  	Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha256;
    --  	 boundary="------------050103020705000601010800"
    --  	X-Priority: 3 (Normal)
    --  	Subject: Sample RSASSA-PSS Signed Email
    --  	From: support@chilkatsoft.com
    --  	To: "Chilkat Support" <support@chilkatsoft.com>,
    --  	 "Chilkat GMail" <chilkat.support@gmail.com>
    -- 
    --  	--------------050103020705000601010800
    --  	Content-Type: text/plain; format=flowed
    --  	Content-Transfer-Encoding: 7bit
    -- 
    --  	Sample RSASSA-PSS Signed Email
    --  	--------------050103020705000601010800
    --  	Content-Transfer-Encoding: base64
    --  	Content-Type: application/pkcs7-signature; name="smime.p7s"
    --  	Content-Disposition: attachment; filename="smime.p7s"
    -- 
    --  	MIIG5wYJKoZIhvcNAQcCoIIG2DCCBtQCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
    --  	ggL4MIIC9DCCAl2gAwIBAgIJAMPsJCT11cniMA0GCSqGSIb3DQEBCwUAMIGSMQswCQYDVQQGEwJB
    --  	VTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJu
    --  	ZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWlu
    --  	QGludGVybmV0d2lkZ2V0cy5jb20wHhcNMTYxMTAxMTY1MjMyWhcNMjExMDMxMTY1MjMyWjCBkjEL
    --  	MAkGA1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNV
    --  	BAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcN
    --  	AQkBFhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKB
    --  	gQDGIdoCjyavs+F/Rm0VIB4m6O7VL1j+1IqieoR9NEX2GQvu2VCdceyxf9qaw1bxipEvjLwUkw7M
    --  	e+BTlLpWQbBMH87s6KpsC8MVyXhMLpP0oM8NFix/vLz2wdLhUh7CZvJA0plqkJk9bj57QIu+EO1k
    --  	tUHM2DFb6sckvCL2yybD1wIDAQABo1AwTjAdBgNVHQ4EFgQUONKKu2zsXIrinWxIGT654vrcQwsw
    --  	HwYDVR0jBBgwFoAUONKKu2zsXIrinWxIGT654vrcQwswDAYDVR0TBAUwAwEB/zANBgkqhkiG9w0B
    --  	AQsFAAOBgQArFvdi5u9i2QF1Qw+cdC1l7w2Y3+q6RIkln2W8rWJFje00644o8hXy7v46giJCedmF
    --  	ULlhm1n7XIsZGy2W3lJ77v5agn9gFwXu1h3cqkGXkoteE6SQJQXWgsW3GWPveObvTL8LF4y57fgM
    --  	9ZWS+V9MJajeu44Rf/tU17TLYKjvEjGCA7MwggOvAgEBMIGgMIGSMQswCQYDVQQGEwJBVTERMA8G
    --  	A1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lk
    --  	Z2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG9w0BCQEWGWFkbWluQGludGVy
    --  	bmV0d2lkZ2V0cy5jb20CCQDD7CQk9dXJ4jANBglghkgBZQMEAgEFAKCCAjQwGAYJKoZIhvcNAQkD
    --  	MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTcwNDIwMTUxNDU4WjAvBgkqhkiG9w0BCQQx
    --  	IgQgoHOtpFiAgti0cwDw46C8wyYSZbhx2yJqJZ/qRE8WPSQwXwYJKoZIhvcNAQkPMVIwUDALBglg
    --  	hkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFAMAcGBSsO
    --  	AwIHMA0GCCqGSIb3DQMCAgEoMIGxBgkrBgEEAYI3EAQxgaMwgaAwgZIxCzAJBgNVBAYTAkFVMREw
    --  	DwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJbnRlcm5ldCBX
    --  	aWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZYWRtaW5AaW50
    --  	ZXJuZXR3aWRnZXRzLmNvbQIJAMPsJCT11cniMIGzBgsqhkiG9w0BCRACCzGBo6CBoDCBkjELMAkG
    --  	A1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNVBAoM
    --  	GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkB
    --  	FhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwPQYJKoZIhvcNAQEKMDCgDTAL
    --  	BglghkgBZQMEAgGhGjAYBgkqhkiG9w0BAQgwCwYJYIZIAWUDBAIBogMCASAEgYCDQpT6vJZ9zERJ
    --  	JVX69PGUfCN5Eq9pKzoOTQSrIBe1YgNDSPd5pyOPP2MN1RpI0T/GTQZw4iWy5LZq0T5sjmk3fFVB
    --  	+VZjKtkTuhGaCdzMQXomVLBbI2fN4UaA4v1/Ayrqr8SY9Rsa20TpKv/bufK7oYs083UOtlcA1EHY
    --  	41wQ5A==
    -- 
    --  	--------------050103020705000601010800--

    EXEC @hr = sp_OADestroy @pfx
    EXEC @hr = sp_OADestroy @email
    EXEC @hr = sp_OADestroy @mailman


END
GO

 

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