Dkim ActiveX Reference Documentation

Dkim

DomainKeys API for creating and verifying DKIM-Signature and DomainKey-Signature MIME (email) header fields. This API is included with the "Chilkat MIME" license. ("Chilkat MIME" may be referred to as "Chilkat S/MIME" on some chilkatsoft.com web pages. They are the same product.)

Object Creation

(Visual Basic 6.0)
Dim obj As New ChilkatDkim

(ASP)
set obj = Server.CreateObject("Chilkat_9_5_0.Dkim")

(VBScript)
set obj = CreateObject("Chilkat_9_5_0.Dkim")

(Delphi)
obj := TChilkatDkim.Create(Self);

(FoxPro)
loObject = CreateObject('Chilkat_9_5_0.Dkim')

(PowerBuilder)
lole_object = create oleobject
li_rc = lole_object.ConnectToNewObject("Chilkat_9_5_0.Dkim")

(SQL Server)
EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Dkim', @obj OUT

(Javascript)
var obj = new ActiveXObject("Chilkat_9_5_0.Dkim");

Properties

AbortCurrent As Long

Introduced in version 9.5.0.58

When set to 1, causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to 0 when the next method is called. When the abort occurs, this property is reset to 0. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

DebugLogFilePath As String

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

DkimAlg As String

The signing algorithm to be used in creating the DKIM-Signature. Possible values are "rsa-sha256" and "rsa-sha1". The default value is "rsa-sha256".

DkimBodyLengthCount As Long

Optional body length count to set a maximum number of body bytes to be hashed when creating the DKIM-Signature field. The default value is 0, indicating that the entire body should be hashed.

DkimCanon As String

Canonicalization algorithm to be used for both header and body when creating the DKIM-Signature. Possible values are "simple" and "relaxed". The default value is "relaxed".

DkimDomain As String

The domain name of the signing domain when creating the DKIM-Signature.

DkimHeaders As String

A colon-separated list of header field names that identify headers presented to the signing algorithm when creating the DKIM-Signature. The default value is: "mime-version:date:message-id:subject:from:to:content-type".

DkimSelector As String

The selector to be used to form the DNS query for the public key. This property applies to creating a DKIM-Signature. For example, if the selector is "reykjavik" and the domain is "example-code.com", then the DNS query would be for "reykjavik._domainkey.example-code.com".

DomainKeyAlg As String

The signing algorithm to be used in creating the DomainKey-Signature. The only possible value is "rsa-sha1". The default value is "rsa-sha1".

DomainKeyCanon As String

Canonicalization algorithm to be used for when creating the DomainKey-Signature. Possible values are "simple" and "nofws". The default value is "nofws".

DomainKeyDomain As String

The domain name of the signing domain when creating the DomainKey-Signature.

DomainKeyHeaders As String

A colon-separated list of header field names that identify headers presented to the signing algorithm when creating the DomainKey-Signature. The default value is: "mime-version:date:message-id:subject:from:to:content-type".

DomainKeySelector As String

The selector to be used to form the DNS query for the public key. This property applies to creating a DomainKey-Signature. For example, if the selector is "reykjavik" and the domain is "example-code.com", then the DNS query would be for "reykjavik._domainkey.example-code.com".

HeartbeatMs As Long

The number of milliseconds between each AbortCheck event callback. The AbortCheck callback allows an application to abort any method call prior to completion. If HeartbeatMs is 0 (the default), no AbortCheck event callbacks will fire.

LastBinaryResult As Variant (read-only)

Introduced in version 9.5.0.52

The binary data returned by the last (binary data returning) method called. Only available if Chilkat.Global.KeepBinaryResult is set to 1. This provides a means for obtaining large varbinary results in the SQL Server environment (where limitations exist in getting large amounts of data returned by method calls, but where temp tables can be used for binary properties).

LastErrorHtml As String (read-only)

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastErrorText As String (read-only)

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

Concept of LastErrorText

LastErrorText Standard Information

LastErrorXml As String (read-only)

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastMethodSuccess As Long

Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of 1 indicates success, a value of 0 indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = 1 and failure = 0.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to 1. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

LastStringResult As String (read-only)

Introduced in version 9.5.0.52

The string return value of the last (string returning) method called. Only available if Chilkat.Global.KeepStringResult is set to 1. This provides a means for obtaining large string results in the SQL Server environment (where limitations exist in getting long strings returned by method calls, but where temp tables can be used for string properties).

Long Strings Returned by ActiveX Methods in SQL Server

LastStringResultLen As Long (read-only)

Introduced in version 9.5.0.53

The length, in characters, of the string contained in the LastStringResult property.

VerboseLogging As Long

If set to 1, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is 0. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

Version As String (read-only)

Version of the component/library, such as "9.5.0.63"

Methods

AddDkimSignature(mimeIn As Variant) As Variant

This method is deprecated. It will be removed in a future version.

Constructs and prepends a DKIM-Signature header to the MIME. Prior to calling this method, your program must set both the DkimDomain and DkimSelector properties, and it must load a private key by calling LoadDkimPk or LoadDkimPkFile.

Note: This method is deprecated. Use the DkimSign method instead.

Returns a zero-length byte array (as a Variant) on failure.
An empty array will have a UBound of -1 meaning 0 elements.

(Classic ASP) Add DKIM-Signature Header to MIME / Email

(Visual FoxPro) Add DKIM-Signature Header to MIME / Email

(PowerBuilder) Add DKIM-Signature Header to MIME / Email

(SQL Server) Add DKIM-Signature Header to MIME / Email

(Visual Basic 6.0) Add DKIM-Signature Header to MIME / Email

(VBScript) Add DKIM-Signature Header to MIME / Email

(Classic ASP) Send DKIM Signed Email

(Visual FoxPro) Send DKIM Signed Email

(PowerBuilder) Send DKIM Signed Email

(SQL Server) Send DKIM Signed Email

(Visual Basic 6.0) Send DKIM Signed Email

(VBScript) Send DKIM Signed Email

AddDomainKeySignature(mimeIn As Variant) As Variant

This method is deprecated. It will be removed in a future version.

Constructs and prepends a DomainKey-Signature header to the MIME. Prior to calling this method, your program must set both the DomainKeyDomain and DomainKeySelector properties, and it must load a private key by calling LoadDomainKeyPk or LoadDomainKeyPkFile.

Note: This method is deprecated. Use the DomainKeySign method instead.

Returns a zero-length byte array (as a Variant) on failure.
An empty array will have a UBound of -1 meaning 0 elements.

(Classic ASP) Add DomainKey-Signature Header to MIME / Email

(Visual FoxPro) Add DomainKey-Signature Header to MIME / Email

(PowerBuilder) Add DomainKey-Signature Header to MIME / Email

(SQL Server) Add DomainKey-Signature Header to MIME / Email

(Visual Basic 6.0) Add DomainKey-Signature Header to MIME / Email

(VBScript) Add DomainKey-Signature Header to MIME / Email

DkimSign(mimeData As ChilkatBinData) As Long

Introduced in version 9.5.0.71

Constructs and prepends a DKIM-Signature header to the MIME passed in mimeData. Prior to calling this method, your program must set both the DkimDomain and DkimSelector properties, and it must load a private key by calling SetDkimPrivateKey.

Returns 1 for success, 0 for failure.

DkimVerify(ByVal sigIndex As Long, mimeData As ChilkatBinData) As Long

Introduced in version 9.5.0.71

Verifies the Nth DKIM-Signature header in the mimeData. (In most cases, there is only one signature.) The 1st signature is at sigIndex 0.

Important: Many anti-virus programs, such as AVG, will modify the MIME of an email as it is received. This will cause DKIM signature verification to fail because the body of the MIME is modified.

Returns 1 for success, 0 for failure.

DomainKeySign(mimeData As ChilkatBinData) As Long

Introduced in version 9.5.0.71

Constructs and prepends a DomainKey-Signature header to the MIME passed in mimeData. Prior to calling this method, your program must set both the DomainKeyDomain and DomainKeySelector properties, and it must load a private key by calling SetDomainKeyPrivateKey.

Returns 1 for success, 0 for failure.

DomainKeyVerify(ByVal sigIndex As Long, mimeData As ChilkatBinData) As Long

Introduced in version 9.5.0.71

Verifies the Nth DomainKey-Signature header in the mimeData. (In most cases, there is only one signature.) The 1st signature is at sigIndex 0.

Important: Many anti-virus programs, such as AVG, will modify the MIME of an email as it is received. This will cause DomainKey signature verification to fail because the body of the MIME is modified.

Returns 1 for success, 0 for failure.

LoadDkimPk(privateKey As String, optionalPassword As String) As Long

This method is deprecated. It will be removed in a future version.

Loads an RSA private key to be used for creating a DKIM-Signature. Any valid RSA private key format that is not binary, such as PEM or XML, may be passed to this method. This method will automatically determine the format and parse it correctly. A password is only required if key is encrypted, such as for encrypted PEM.

Note: This method is deprecated. Use the SetDkimPrivateKey method instead.

Returns 1 for success, 0 for failure.

(Classic ASP) DKIM Signature using Windows Current User Certificate Store

(Visual FoxPro) DKIM Signature using Windows Current User Certificate Store

(PowerBuilder) DKIM Signature using Windows Current User Certificate Store

(SQL Server) DKIM Signature using Windows Current User Certificate Store

(Visual Basic 6.0) DKIM Signature using Windows Current User Certificate Store

(VBScript) DKIM Signature using Windows Current User Certificate Store

LoadDkimPkBytes(privateKeyDer As Variant, optionalPassword As String) As Long

This method is deprecated. It will be removed in a future version.

Loads an RSA private key to be used for creating a DKIM-Signature. Any valid RSA private key binary format, such as DER, may be passed to this method. This method will automatically determine the format and parse it correctly. A password is only required if key is encrypted.

Note: This method is deprecated. Use the SetDkimPrivateKey method instead.

Returns 1 for success, 0 for failure.

LoadDkimPkFile(privateKeyFilePath As String, optionalPassword As String) As Long

This method is deprecated. It will be removed in a future version.

Loads an RSA private key file to be used for creating a DKIM-Signature. The file name contains any valid RSA private key format, such as DER, PKCS8, PEM, XML, etc. This method will automatically determine the format and parse it correctly. A password is only required if key is encrypted, such as for encrypted PEM or encrypted PKCS8.

Note: This method is deprecated. Use the SetDkimPrivateKey method instead.

Returns 1 for success, 0 for failure.

LoadDomainKeyPk(privateKey As String, optionalPassword As String) As Long

This method is deprecated. It will be removed in a future version.

Loads an RSA private key to be used for creating a DomainKey-Signature. Any valid RSA private key format that is not binary, such as PEM or XML, may be passed to this method. This method will automatically determine the format and parse it correctly. A password is only required if key is encrypted, such as for encrypted PEM.

Note: This method is deprecated. Use the SetDomainKeyPrivateKey method instead.

Returns 1 for success, 0 for failure.

LoadDomainKeyPkBytes(privateKeyDer As Variant, optionalPassword As String) As Long

This method is deprecated. It will be removed in a future version.

Loads an RSA private key to be used for creating a DomainKey-Signature. Any valid RSA private key binary format, such as DER, may be passed to this method. This method will automatically determine the format and parse it correctly. A password is only required if key is encrypted.

Note: This method is deprecated. Use the SetDomainKeyPrivateKey method instead.

Returns 1 for success, 0 for failure.

LoadDomainKeyPkFile(privateKeyFilePath As String, optionalPassword As String) As Long

This method is deprecated. It will be removed in a future version.

Loads an RSA private key file to be used for creating a DomainKey-Signature. The file name contains any valid RSA private key format, such as DER, PKCS8, PEM, XML, etc. This method will automatically determine the format and parse it correctly. A password is only required if key is encrypted, such as for encrypted PEM or encrypted PKCS8.

Note: This method is deprecated. Use the SetDomainKeyPrivateKey method instead.

Returns 1 for success, 0 for failure.

LoadPublicKey(selector As String, domain As String, publicKey As String) As Long

Caches a public key to be used for verifying DKIM and DomainKey signatures for a given selector and domain. The publicKey is a string containing an RSA public key in any text format, such as XML, PEM, etc. This method will automatically detect the format and load the public key correctly. This method is useful for testing DKIM and DomainKey verification when your public key has not yet been installed in DNS.

Returns 1 for success, 0 for failure.

LoadPublicKeyFile(selector As String, domain As String, publicKeyFilepath As String) As Long

Caches a public key to be used for verifying DKIM and DomainKey signatures for a given selector and domain. The publicKeyFilepath is a filepath of an RSA public key in any format. This method will automatically detect the format and load the public key correctly. This method is useful for testing DKIM and DomainKey verification when your public key has not yet been installed in DNS.

Returns 1 for success, 0 for failure.

NumDkimSignatures(mimeData As Variant) As Long

Returns the number of DKIM-Signature header fields found in mimeData.

NumDomainKeySignatures(mimeData As Variant) As Long

Returns the number of DomainKey-Signature header fields found in mimeData.

PrefetchPublicKey(selector As String, domain As String) As Long

Useful if your application is going to verify many emails from a single domain (or a few domains). This eliminates the need to do a DNS lookup to fetch the public key each time an email's DKIM or DomainKey signature is verified.

This method may be called multiple times -- once for each selector/domain to be pre-fetched. The verify methods (VerifyDkimSignature and VerifyDomainKeySignature) will use a pre-fetched key if the selector and domain match.

Returns 1 for success, 0 for failure.

PrefetchPublicKeyAsync(selector As String, domain As String) As ChilkatTask

Creates an asynchronous task to call the PrefetchPublicKey method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

SetDkimPrivateKey(privateKey As PrivateKey) As Long

Introduced in version 9.5.0.71

Sets the private key file to be used for creating a DKIM-Signature.

Returns 1 for success, 0 for failure.

SetDomainKeyPrivateKey(privateKey As PrivateKey) As Long

Introduced in version 9.5.0.71

Sets the private key file to be used for creating a DomainKey-Signature.

Returns 1 for success, 0 for failure.

UnlockComponent(unlockCode As String) As Long

Unlocks the component allowing for the full functionality to be used. If this method unexpectedly returns 0, examine the contents of the LastErrorText property to determine the reason for failure.

Returns 1 for success, 0 for failure.

Diagnosing UnlockComponent Problems

UnlockComponent LastErrorText shows exact string passed to it.

Verify UnlockComponent Success w/ Purchased Unlock Code

LastErrorText Standard Information

VerifyDkimSignature(ByVal sigIndex As Long, mimeData As Variant) As Long

This method is deprecated. It will be removed in a future version.

Verifies the Nth DKIM-Signature header in the mimeData. (In most cases, there is only one signature.) The 1st signature is at sigIndex 0.

Important: Many anti-virus programs, such as AVG, will modify the MIME of an email as it is received. This will cause DKIM signature verification to fail because the body of the MIME is modified.

Note: This method is deprecated. Use the DkimVerify method instead.

Returns 1 for success, 0 for failure.

VerifyDkimSignatureAsync(ByVal sigIndex As Long, mimeData As Variant) As ChilkatTask

This method is deprecated. It will be removed in a future version.

Creates an asynchronous task to call the VerifyDkimSignature method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

VerifyDomainKeySignature(ByVal sigIndex As Long, mimeData As Variant) As Long

This method is deprecated. It will be removed in a future version.

Verifies the Nth DomainKey-Signature header in the mimeData. (In most cases, there is only one signature.) The 1st signature is at sigIndex 0.

Important: Many anti-virus programs, such as AVG, will modify the MIME of an email as it is received. This will cause DomainKey signature verification to fail because the body of the MIME is modified.

Note: This method is deprecated. Use the DomainKeyVerify method instead.

Returns 1 for success, 0 for failure.

VerifyDomainKeySignatureAsync(ByVal sigIndex As Long, mimeData As Variant) As ChilkatTask

This method is deprecated. It will be removed in a future version.

Creates an asynchronous task to call the VerifyDomainKeySignature method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

VB6 Programs MUST Call FinalizeThreadPool Just Before Exiting

Asynchronous Methods in VB6 - Be Very Careful with Callbacks

(Classic ASP) How to Run an Asynchronous Task

(Visual FoxPro) How to Run an Asynchronous Task

(PowerBuilder) How to Run an Asynchronous Task

(SQL Server) How to Run an Asynchronous Task

(Visual Basic 6.0) How to Run an Asynchronous Task

(VBScript) How to Run an Asynchronous Task

Events

AbortCheck(abort As Long)

Provides the opportunity for a method call to be aborted. The AbortCheck event is fired periodically based on the value of the HeartbeatMs property. If HeartbeatMs is 0, then no AbortCheck events will fire. As an example, to fire 5 AbortCheck events per second, set the HeartbeatMs property equal to 200.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myDkim As ChilkatDkim

Private Sub myDkim_AbortCheck(abort As Long)

	'Insert application code here.

End Sub

BinaryData(data As Variant)

Binary data provided by certain methods.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myDkim As ChilkatDkim

Private Sub myDkim_BinaryData(data As Variant)

	'Insert application code here.

End Sub

PercentDone(ByVal pctDone As Long, abort As Long)

Provides the percentage completed for any method that involves network communications or time-consuming processing (assuming it is a method where a percentage completion can be measured). This event is only fired when it is possible to know a percentage completion, and when it makes sense to express the operation as a percentage completed. The pctDone argument will have a value from 1 to 100. For operations (Chilkat method calls) that complete very quickly, the number of PercentDone callbacks will vary, but the final callback should have a value of 100. For long running operations, no more than one callback per percentage point will occur (for example: 1, 2, 3, ... 98, 99, 100).

The PercentDone callback counts as an AbortCheck event. For method calls that complete quickly such that PercentDone events fire, it may be that AbortCheck events don't fire because the opportunity to abort is already provided in the PercentDone callback. For time consuming operations, where the amount of time between PercentDone callbacks are long, AbortCheck callbacks may be used to allow for the operation to be aborted in a more responsive manner.

The abort output argument provides a means for aborting the operation. Setting it to 1 will cause the method to abort and return a failed status (or whatever return value indicates failure).

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myDkim As ChilkatDkim

Private Sub myDkim_PercentDone(ByVal pctDone As Long, abort As Long)

	'Insert application code here.

End Sub

ProgressInfo(name As String, value As String)

A general name/value event that provides information about what is happening during a method call. To find out what information is available, write code to handle this event and log the name/value pairs. Most are self-explanatory.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myDkim As ChilkatDkim

Private Sub myDkim_ProgressInfo(name As String, value As String)

	'Insert application code here.

End Sub

TextData(data As String)

Text data provided by certain methods.

VB6 Event callback implementation:

Important: Event callbacks from asynchronous method calls are generally not possible from the ActiveX. See VB6 Async Callbacks

Dim WithEvents myDkim As ChilkatDkim

Private Sub myDkim_TextData(data As String)

	'Insert application code here.

End Sub