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DataFlex Examples

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(DataFlex) Sign MIME using RSASSA-PSS with SHA256

Demonstrates how to sign an MIME 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

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoMime
    Variant vPart0
    Handle hoPart0
    Variant vPart1
    Handle hoPart1
    Variant vSbUnsignedMime
    Handle hoSbUnsignedMime
    Handle hoPfx
    Variant vCert
    Handle hoCert
    String sTemp1
    Boolean bTemp1

    //  This example assumes Chilkat Mime to have been previously unlocked.
    //  See Unlock Mime for sample code.

    Get Create (RefClass(cComChilkatMime)) To hoMime
    If (Not(IsComObjectCreated(hoMime))) Begin
        Send CreateComObject of hoMime
    End

    //  Create a MIME message to sign.
    Get ComNewMultipartMixed Of hoMime To iSuccess
    Get ComAddHeaderField Of hoMime "someHeader1" "Some value 1" To iSuccess
    Get ComAddHeaderField Of hoMime "someHeader2" "Some value 2" To iSuccess

    Get Create (RefClass(cComChilkatMime)) To hoPart0
    If (Not(IsComObjectCreated(hoPart0))) Begin
        Send CreateComObject of hoPart0
    End
    Get ComAddHeaderField Of hoPart0 "hdrA" "Some value A" To iSuccess
    Get ComAddHeaderField Of hoPart0 "hdrB" "Some value B" To iSuccess
    Set ComContentType Of hoPart0 To "text/plain"
    Send ComSetBody To hoPart0 "This is the plain-text body."

    Get Create (RefClass(cComChilkatMime)) To hoPart1
    If (Not(IsComObjectCreated(hoPart1))) Begin
        Send CreateComObject of hoPart1
    End
    Get ComAddHeaderField Of hoPart1 "hdrX" "Some value X" To iSuccess
    Get ComAddHeaderField Of hoPart1 "hdrY" "Some value Y" To iSuccess
    Set ComContentType Of hoPart1 To "text/xml"
    Send ComSetBody To hoPart1 "<a>This is the XML body</a>"

    Get pvComObject of hoPart0 to vPart0
    Get ComAppendPart Of hoMime vPart0 To iSuccess
    Get pvComObject of hoPart1 to vPart1
    Get ComAppendPart Of hoMime vPart1 To iSuccess

    //  The MIME to be signed:
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbUnsignedMime
    If (Not(IsComObjectCreated(hoSbUnsignedMime))) Begin
        Send CreateComObject of hoSbUnsignedMime
    End
    Get pvComObject of hoSbUnsignedMime to vSbUnsignedMime
    Get ComGetMimeSb Of hoMime vSbUnsignedMime To iSuccess
    Get ComGetAsString Of hoSbUnsignedMime To sTemp1
    Showln sTemp1

    //  	Content-Type: multipart/mixed; boundary="------------080303020600020604010008"
    //  	someHeader1: Some value 1
    //  	someHeader2: Some value 2
    // 
    //  	--------------080303020600020604010008
    //  	hdrA: Some value A
    //  	hdrB: Some value B
    //  	Content-Type: text/plain
    // 
    //  	This is the plain-text body.
    //  	--------------080303020600020604010008
    //  	hdrX: Some value X
    //  	hdrY: Some value Y
    //  	Content-Type: text/xml
    // 
    //  	<a>This is the XML body</a>
    //  	--------------080303020600020604010008--
    // 

    //  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.)
    Get Create (RefClass(cComChilkatPfx)) To hoPfx
    If (Not(IsComObjectCreated(hoPfx))) Begin
        Send CreateComObject of hoPfx
    End
    Get ComLoadPfxFile Of hoPfx "qa_data/rsassa-pss/privatekey.pfx" "PFX_PASSWORD" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoPfx To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  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.)
    Get ComGetCert Of hoPfx 0 To vCert
    If (IsComObject(vCert)) Begin
        Get Create (RefClass(cComChilkatCert)) To hoCert
        Set pvComObject Of hoCert To vCert
    End
    Get ComLastMethodSuccess Of hoPfx To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoPfx To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Indicate that RSASSA-PSS with SHA256 should be used.
    Set ComSigningAlg Of hoMime To "pss"
    Set ComSigningHashAlg Of hoMime To "sha256"

    //  Add a detached signature.
    Get ComAddDetachedSignature Of hoMime vCert To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Send Destroy of hoCert
        Procedure_Return
    End

    //  Show the clear-signed MIME. (see the sample output below)
    Showln "-------------------------------------------------------------"
    Showln "Clear-signed MIME using detached signature:"
    Showln "-------------------------------------------------------------"
    Get ComGetMime Of hoMime To sTemp1
    Showln sTemp1

    //  Restore the original unsigned MIME, and this time create an opaque signature.
    Get ComGetAsString Of hoSbUnsignedMime To sTemp1
    Get ComLoadMime Of hoMime sTemp1 To iSuccess

    //  Sign using an opaque signature
    Get ComConvertToSigned Of hoMime vCert To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Send Destroy of hoCert
        Procedure_Return
    End

    //  Show the opaque-signed MIME. (see the sample output below)
    Showln "-------------------------------------------------------------"
    Showln "Opaque-signed MIME :"
    Showln "-------------------------------------------------------------"
    Get ComGetMime Of hoMime To sTemp1
    Showln sTemp1

    Send Destroy of hoCert
    Showln "Success."

    //  -----------------------------------------------
    //  This is sample output for the clear-signed MIME:
    //  -----------------------------------------------
    // 
    //  	Content-Type: multipart/signed; boundary="----=_NextPart_672_c95a_97b64c9a.90b5204d";
    //  	 protocol="application/x-pkcs7-signature";
    //  	 micalg=sha256
    // 
    //  	------=_NextPart_672_c95a_97b64c9a.90b5204d
    //  	Content-Type: multipart/mixed; boundary="------------030207090102000301050504"
    //  	someHeader1: Some value 1
    //  	someHeader2: Some value 2
    // 
    //  	--------------030207090102000301050504
    //  	hdrA: Some value A
    //  	hdrB: Some value B
    //  	Content-Type: text/plain
    // 
    //  	This is the plain-text body.
    //  	--------------030207090102000301050504
    //  	hdrX: Some value X
    //  	hdrY: Some value Y
    //  	Content-Type: text/xml
    // 
    //  	<a>This is the XML body</a>
    //  	--------------030207090102000301050504--
    // 
    //  	------=_NextPart_672_c95a_97b64c9a.90b5204d
    //  	Content-Transfer-Encoding: base64
    //  	Content-Type: application/x-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
    //  	MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTcwNDIwMTU1NDMyWjAvBgkqhkiG9w0BCQQx
    //  	IgQgFEtkdw1+iBXvplXCUkOPlq66b+mDg+HBcChLn5YowD8wXwYJKoZIhvcNAQkPMVIwUDALBglg
    //  	hkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFAMAcGBSsO
    //  	AwIHMA0GCCqGSIb3DQMCAgEoMIGxBgkrBgEEAYI3EAQxgaMwgaAwgZIxCzAJBgNVBAYTAkFVMREw
    //  	DwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJbnRlcm5ldCBX
    //  	aWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZYWRtaW5AaW50
    //  	ZXJuZXR3aWRnZXRzLmNvbQIJAMPsJCT11cniMIGzBgsqhkiG9w0BCRACCzGBo6CBoDCBkjELMAkG
    //  	A1UEBhMCQVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNVBAoM
    //  	GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkB
    //  	FhlhZG1pbkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwPQYJKoZIhvcNAQEKMDCgDTAL
    //  	BglghkgBZQMEAgGhGjAYBgkqhkiG9w0BAQgwCwYJYIZIAWUDBAIBogMCASAEgYAvqIqKBzNXyVbh
    //  	TmaxdAc4d0ZTqWT6Na3C+DMO8owSKWy5FdGbJ2DLKm92qe/KLPTcj51vuwLUQb0Sw7r5Xknl+/6p
    //  	Eqn2qe/6hgDn06vvzNofVAweOtSVJsBO7/cYYPc+pXZZ2BcpZDdf/9Ci56Yrlk7A72BeqPe47J3F
    //  	neC8qw==
    // 
    //  	------=_NextPart_672_c95a_97b64c9a.90b5204d--
    // 

    //  -----------------------------------------------
    //  This is sample output for the opaque-signed MIME:
    //  -----------------------------------------------
    //  	Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="signed-data"
    //  	someHeader1: Some value 1
    //  	someHeader2: Some value 2
    //  	Content-Disposition: attachment; filename="smime.p7m"
    //  	Content-Transfer-Encoding: base64
    // 
    //  	MIIItAYJKoZIhvcNAQcCoIIIpTCCCKECAQExDzANBglghkgBZQMEAgEFADCCAdYGCSqGSIb3DQEH
    //  	AaCCAccEggHDQ29udGVudC1UeXBlOiBtdWx0aXBhcnQvbWl4ZWQ7IGJvdW5kYXJ5PSItLS0tLS0t
    //  	LS0tLS0wMDA2MDcwNzA3MDcwMTA1MDAwMTA5MDciDQpzb21lSGVhZGVyMTogU29tZSB2YWx1ZSAx
    //  	DQpzb21lSGVhZGVyMjogU29tZSB2YWx1ZSAyDQoNCi0tLS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3
    //  	MDEwNTAwMDEwOTA3DQpoZHJBOiBTb21lIHZhbHVlIEENCmhkckI6IFNvbWUgdmFsdWUgQg0KQ29u
    //  	dGVudC1UeXBlOiB0ZXh0L3BsYWluDQoNClRoaXMgaXMgdGhlIHBsYWluLXRleHQgYm9keS4NCi0t
    //  	LS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3MDEwNTAwMDEwOTA3DQpoZHJYOiBTb21lIHZhbHVlIFgN
    //  	Cmhkclk6IFNvbWUgdmFsdWUgWQ0KQ29udGVudC1UeXBlOiB0ZXh0L3htbA0KDQo8YT5UaGlzIGlz
    //  	IHRoZSBYTUwgYm9keTwvYT4NCi0tLS0tLS0tLS0tLS0tMDAwNjA3MDcwNzA3MDEwNTAwMDEwOTA3
    //  	LS0NCqCCAvgwggL0MIICXaADAgECAgkAw+wkJPXVyeIwDQYJKoZIhvcNAQELBQAwgZIxCzAJBgNV
    //  	BAYTAkFVMREwDwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJ
    //  	bnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZ
    //  	YWRtaW5AaW50ZXJuZXR3aWRnZXRzLmNvbTAeFw0xNjExMDExNjUyMzJaFw0yMTEwMzExNjUyMzJa
    //  	MIGSMQswCQYDVQQGEwJBVTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEh
    //  	MB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkq
    //  	hkiG9w0BCQEWGWFkbWluQGludGVybmV0d2lkZ2V0cy5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0A
    //  	MIGJAoGBAMYh2gKPJq+z4X9GbRUgHibo7tUvWP7UiqJ6hH00RfYZC+7ZUJ1x7LF/2prDVvGKkS+M
    //  	vBSTDsx74FOUulZBsEwfzuzoqmwLwxXJeEwuk/Sgzw0WLH+8vPbB0uFSHsJm8kDSmWqQmT1uPntA
    //  	i74Q7WS1QczYMVvqxyS8IvbLJsPXAgMBAAGjUDBOMB0GA1UdDgQWBBQ40oq7bOxciuKdbEgZPrni
    //  	+txDCzAfBgNVHSMEGDAWgBQ40oq7bOxciuKdbEgZPrni+txDCzAMBgNVHRMEBTADAQH/MA0GCSqG
    //  	SIb3DQEBCwUAA4GBACsW92Lm72LZAXVDD5x0LWXvDZjf6rpEiSWfZbytYkWN7TTrjijyFfLu/jqC
    //  	IkJ52YVQuWGbWftcixkbLZbeUnvu/lqCf2AXBe7WHdyqQZeSi14TpJAlBdaCxbcZY+945u9MvwsX
    //  	jLnt+Az1lZL5X0wlqN67jhF/+1TXtMtgqO8SMYIDszCCA68CAQEwgaAwgZIxCzAJBgNVBAYTAkFV
    //  	MREwDwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJTWVsYm91cm5lMSEwHwYDVQQKDBhJbnRlcm5l
    //  	dCBXaWRnaXRzIFB0eSBMdGQxDzANBgNVBAMMBldpZGdldDEoMCYGCSqGSIb3DQEJARYZYWRtaW5A
    //  	aW50ZXJuZXR3aWRnZXRzLmNvbQIJAMPsJCT11cniMA0GCWCGSAFlAwQCAQUAoIICNDAYBgkqhkiG
    //  	9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xNzA0MjAxNTU4NTNaMC8GCSqGSIb3
    //  	DQEJBDEiBCBWTSl3s251U8fqOeSAzUp1Yue53X+UCWT0ux+fclE4FDBfBgkqhkiG9w0BCQ8xUjBQ
    //  	MAsGCWCGSAFlAwQBAjAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwICAUAw
    //  	BwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgbEGCSsGAQQBgjcQBDGBozCBoDCBkjELMAkGA1UEBhMC
    //  	QVUxETAPBgNVBAgMCFZpY3RvcmlhMRIwEAYDVQQHDAlNZWxib3VybmUxITAfBgNVBAoMGEludGVy
    //  	bmV0IFdpZGdpdHMgUHR5IEx0ZDEPMA0GA1UEAwwGV2lkZ2V0MSgwJgYJKoZIhvcNAQkBFhlhZG1p
    //  	bkBpbnRlcm5ldHdpZGdldHMuY29tAgkAw+wkJPXVyeIwgbMGCyqGSIb3DQEJEAILMYGjoIGgMIGS
    //  	MQswCQYDVQQGEwJBVTERMA8GA1UECAwIVmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTEhMB8G
    //  	A1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZXaWRnZXQxKDAmBgkqhkiG
    //  	9w0BCQEWGWFkbWluQGludGVybmV0d2lkZ2V0cy5jb20CCQDD7CQk9dXJ4jA9BgkqhkiG9w0BAQow
    //  	MKANMAsGCWCGSAFlAwQCAaEaMBgGCSqGSIb3DQEBCDALBglghkgBZQMEAgGiAwIBIASBgILtktxt
    //  	tXWMWio7hLcvHUWk0Q3jP3rRdgNhcd/NdZsgDFP9/aq8/nHLLHSWfSh1PH+eZeKJwXxUH4Lwk6Sm
    //  	xFt97jyi3HaC3fezUSEqyg5WFG6fwOZGK4qF0WF+q29lvyNyV3iIQgDWxZQOcVL2fhpqUjoytkxj
    //  	/QTfrLOuzXKy
    // 


End_Procedure

 

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