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Visual FoxPro

Send a Signed Email using RSASSA-PSS with SHA256

See more SMTP Examples

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

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LOCAL lnSuccess
LOCAL loPfx
LOCAL loEmail
LOCAL loCert
LOCAL loMailman

lnSuccess = 0

* This example requires the Chilkat API to have been previously unlocked.
* See Global Unlock Sample 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.)
loPfx = CreateObject('Chilkat.Pfx')
lnSuccess = loPfx.LoadPfxFile("qa_data/rsassa-pss/privatekey.pfx","PFX_PASSWORD")
IF (lnSuccess = 0) THEN
    ? loPfx.LastErrorText
    RELEASE loPfx
    CANCEL
ENDIF

loEmail = CreateObject('Chilkat.Email')

* Create a simple email.
loEmail.Subject = "Sample RSASSA-PSS Signed Email"
loEmail.Body = "Sample RSASSA-PSS Signed Email"
loEmail.From = "from_name@mydomain.com"
* Add one ore more recipients..
loEmail.AddTo("Chilkat Support","support@chilkatsoft.com")
loEmail.AddTo("Chilkat GMail","chilkat.support@gmail.com")

* Indicate that the email is to be signed, and that we want to use RSASSA-PSS.
loEmail.SendSigned = 1
loEmail.SigningAlg = "pss"
loEmail.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.)

loCert = CreateObject('Chilkat.Cert')
lnSuccess = loPfx.CertAt(0,loCert)
IF (lnSuccess = 0) THEN
    ? loPfx.LastErrorText
    RELEASE loPfx
    RELEASE loEmail
    RELEASE loCert
    CANCEL
ENDIF

* Tell the email object to use this cert (and private key) for signing.
loEmail.SetSigningCert(loCert)

loMailman = CreateObject('Chilkat.MailMan')

* Set the SMTP settings for your email account on your mail server.
loMailman.SmtpUsername = "SMTP_LOGIN"
loMailman.SmtpPassword = "SMTP_PASSWORD"
loMailman.SmtpHost = "MY_SMTP_DOMAIN_OR_IP"
loMailman.SmtpPort = 587
loMailman.StartTLS = 1

* Signed email can be sent in two different ways.  
* In a multipart/signed email, the signature is attached as a separate MIME part.
* In an opaque email (signedData) the content of the email is encapsulated within the signature
* and the email is sent as "application/pkcs7-mime". 
* Either should be fine, but some receiving systems might require one or the other..
loMailman.OpaqueSigning = 0

* Send the email.  The mailman will sign the email as directed by the 
* property settings of the email object.
lnSuccess = loMailman.SendEmail(loEmail)
IF (lnSuccess = 0) THEN
    ? loMailman.LastErrorText
    RELEASE loPfx
    RELEASE loEmail
    RELEASE loCert
    RELEASE loMailman
    CANCEL
ENDIF

lnSuccess = loMailman.CloseSmtpConnection()
IF (lnSuccess <> 1) THEN
    ? "Connection to SMTP server not closed cleanly."
ENDIF

? "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--

RELEASE loPfx
RELEASE loEmail
RELEASE loCert
RELEASE loMailman