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Visual Basic 6.0 Examples


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(Visual Basic 6.0) 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

'  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.)
Dim pfx As New ChilkatPfx
Dim success As Long
success = pfx.LoadPfxFile("qa_data/rsassa-pss/privatekey.pfx","PFX_PASSWORD")
If (success <> 1) Then
    Debug.Print pfx.LastErrorText
    Exit Sub
End If

Dim email As New ChilkatEmail

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

'  Indicate that the email is to be signed, and that we want to use RSASSA-PSS.
email.SendSigned = 1
email.SigningAlg = "pss"
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.)
Dim cert As ChilkatCert
Set cert = pfx.GetCert(0)
If (pfx.LastMethodSuccess <> 1) Then
    Debug.Print pfx.LastErrorText
    Exit Sub
End If

'  Tell the email object to use this cert (and private key) for signing.
success = email.SetSigningCert(cert)

Dim mailman As New ChilkatMailMan

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

'  Send the email.  The mailman will sign the email as directed by the
'  property settings of the email object.
success = mailman.SendEmail(email)
If (success <> 1) Then
    Debug.Print mailman.LastErrorText
    Exit Sub
End If

success = mailman.CloseSmtpConnection()
If (success <> 1) Then
    Debug.Print "Connection to SMTP server not closed cleanly."
End If

Debug.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--

 

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