TChilkatCsp Delphi ActiveX Reference Documentation

TChilkatCsp

Represents a cryptographic service provider for selecting encryption, hashing, and digital signing algorithms.

This class is specific to the Windows operating system, and therefore is only available on Windows systems.

Importing the Chilkat ActiveX into Delphi

Important: Whenever upgrading to a new version of Chilkat, make sure to re-imported ActiveX DLL into Delphi to regenerate the files described below.

Two things are required to use an ActiveX in Delphi:

  1. The ActiveX DLL needs to be registered via regsvr32 on the system where the Delphi application runs. See How To Register ActiveX DLLs for detailed information.
  2. The ActiveX component needs to be "imported". Use the Delphi Import Component Wizard to import the Chilkat type library. This creates the following files: Chilkat_v9_5_0_TLB.pas and Chilkat_v9_5_0_TLB.dcr. The Chilkat_v9_5_0_TLB.pas should be added to your project.

To import the Chilkat type library, do the following:

  1. In the Delphi RAD Studio, select the menu item "Component" --> "Import a Type Library".
  2. Find "Chilkat ActiveX v9.5.0" in the list and select it. This will only appear in the list if the ChilkatAx-9.5.0-win32.dll (or ChilkatAx-9.5.0-x64.dll) has been registered w/ regsvr32.
  3. Check the "Generate Component Wrappers" checkbox.
  4. Select a directory where the unit files (.pas and .dcr) will be generated.
  5. Select "Create Unit" and then "Finish".
  6. Add the .pas to your Delphi project.

To use a Chilkat ActiveX object in your Delphi code, add "Chilkat_v9_5_0_TLB" to the "uses" statement. For example:

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_v9_5_0_TLB;

Object Creation

var
obj: TChilkatCsp;
...
begin
obj := TChilkatCsp.Create(Self);
...
// When finished, free the object instance.
obj.Free();

Properties

property DebugLogFilePath: WideString

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.

property EncryptAlgorithm: WideString readonly

Returns the name of the currently selected encryption algorithm in the currently selected CSP.

property EncryptAlgorithmID: Integer readonly

Returns the ID of the currently selected encryption algorithm in the currently selected CSP.

property EncryptNumBits: Integer readonly

Returns the key-length of the currently selected encryption algorithm in the currently selected CSP.

property HashAlgorithm: WideString readonly

Returns the name of the currently selected hash algorithm in the currently selected CSP.

property HashAlgorithmID: Integer readonly

Returns the ID of the currently selected hash algorithm in the currently selected CSP.

property HashNumBits: Integer readonly

Returns the bit length of the currently selected hash algorithm in the currently selected CSP.

property KeyContainerName: WideString

The name of the currently selected key container within the currently selected CSP. The default is typically the name of the current logged-in user.

property LastBinaryResult: OleVariant readonly

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).

property LastErrorHtml: WideString readonly

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.

property LastErrorText: WideString readonly

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.

property LastErrorXml: WideString readonly

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.

property LastMethodSuccess: Integer

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.

property LastStringResult: WideString readonly

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

property LastStringResultLen: Integer readonly

Introduced in version 9.5.0.53

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

property MachineKeyset: Integer

To be documented soon.

property NumEncryptAlgorithms: Integer readonly

The number of encryption algorithms provided by the currently selected CSP.

property NumHashAlgorithms: Integer readonly

The number of hash algorithms provided by the currently selected CSP.

property NumKeyContainers: Integer readonly

The number of key containers provided by the currently selected CSP.

property NumKeyExchangeAlgorithms: Integer readonly

The number of key exchange algorithms provided by the currently selected CSP.

property NumSignatureAlgorithms: Integer readonly

The number of signature algorithms provided by the currently selected CSP.

property ProviderName: WideString

The currently selected CSP. To select another CSP, simply set this property to the name of the CSP, such as "Microsoft Enhanced Cryptographic Provider v1.0". If the CSP is not available on your machine, the property value will not change. The initial and default value for this property is "Microsoft Base Cryptographic Provider v1.0".

property ProviderType: Integer readonly

This is an integer representing the type of CSP. (Chilkat uses it for internal use.)

property VerboseLogging: Integer

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.

property Version: WideString readonly

Version of the component/library, such as "9.4.1.42"

Methods

function GetKeyContainerNames(): TCkStringArray;

To be documented soon...

function HasEncryptAlgorithm(name: WideString; numBits: Integer): Integer;

Returns true if the currently selected CSP contains an encryption algorithm matching the name and key length. Otherwise returns false.

function HasHashAlgorithm(name: WideString; numBits: Integer): Integer;

Returns true if the currently selected CSP contains a hash algorithm matching the name and bit length. Otherwise returns false.

function Initialize(): Integer;

Intializes the Csp with the selected ProviderName.

function NthEncryptionAlgorithm(index: Integer): WideString;

Returns the name of the Nth encryption algorithm provided by the currently selected CSP. Indexing begins at 0.

Returns a zero-length WideString on failure

function NthEncryptionNumBits(index: Integer): Integer;

Returns the key-length of the currently selected encryption algorithm in the currently selected CSP.

function NthHashAlgorithmName(index: Integer): WideString;

To be documented soon...

Returns a zero-length WideString on failure

function NthHashNumBits(index: Integer): Integer;

Returns the bit length of the Nth hash algorithm provided by the currently selected CSP. Indexing begins at 0.

function NthKeyContainerName(index: Integer): WideString;

Returns the Nth key container name in the currently selected CSP. Indexing begins at 0.

Returns a zero-length WideString on failure

function NthKeyExchangeAlgorithm(index: Integer): WideString;

Returns the Nth key exchange algorithm provided by the currently selected CSP. Indexing begins at 0.

Returns a zero-length WideString on failure

function NthKeyExchangeNumBits(index: Integer): Integer;

Returns the bit length of the Nth key exchange algorithm provided by the currently selected CSP. Indexing begins at 0.

function NthSignatureAlgorithm(index: Integer): WideString;

Returns the name of the Nth signature algorithm provided by the currently selected CSP. Indexing begins at 0.

Returns a zero-length WideString on failure

function NthSignatureNumBits(index: Integer): Integer;

Returns the bit length of the Nth signature algorithm provided by the currently selected CSP. Indexing begins at 0.

function SetEncryptAlgorithm(name: WideString): Integer;

Selects an encryption algorithm. The return value is the key-length of the algorithm. If the algorithm is not available, the return value is 0. (There usually is not a need to explicitly select the key length, because the key length can be part of the name, such as "AES 128", or it is determined by the CSP. For example, the Microsoft Enhanced CSP will return a 128-bit key length for RC2, whereas the Base CSP will return a 40-bit key length.)

function SetHashAlgorithm(name: WideString): Integer;

Selects a hash algorithm. The return value is the bit-length of the algorithm. If the algorithm is not available, the return value is 0.

function SetProviderMicrosoftBase(): Integer;

Sets the CSP to the Base Microsoft Cryptographic Provider, which is the default.

function SetProviderMicrosoftEnhanced(): Integer;

Sets the CSP to the Enhanced Microsoft Cryptographic Provider.

function SetProviderMicrosoftRsaAes(): Integer;

Sets the CSP to the Microsoft Cryptographic RSA/AES Prototype Provider.

function SetProviderMicrosoftStrong(): Integer;

Sets the CSP to the Strong Microsoft Cryptographic Provider.