KeyContainer DataFlex Reference Documentation

KeyContainer

Current Version: 9.5.0.91

A class for listing, importing, exporting, and deleting private keys installed on a Windows system.

Object Creation

// (Dataflex programs use the 32-bit Chilkat ActiveX)
Handle hoKeyContainer
Get Create(RefClass(cComKeyContainer)) to hoKeyContainer

Properties

DebugLogFilePath
Function ComDebugLogFilePath Returns String
Procedure Set ComDebugLogFilePath String value

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.

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LastBinaryResult
Function ComLastBinaryResult Returns Variant
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 True. 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).

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LastErrorHtml
Function ComLastErrorHtml Returns String

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.

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LastErrorText
Function ComLastErrorText Returns String

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.

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LastErrorXml
Function ComLastErrorXml Returns String

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.

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LastMethodSuccess
Function ComLastMethodSuccess Returns Boolean
Procedure Set ComLastMethodSuccess Boolean value
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of True indicates success, a value of False 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 = True and failure = False.
  • 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 True. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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LastStringResult
Function ComLastStringResult Returns String
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 True. 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).

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LastStringResultLen
Function ComLastStringResultLen Returns Integer
Introduced in version 9.5.0.53

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

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LegacyKeySpec
Function ComLegacyKeySpec Returns Integer
Procedure Set ComLegacyKeySpec Integer value
Introduced in version 9.5.0.83

If the storage provider is one for the legacy CryptoAPI, then this property indicate whether to work with AT_KEYEXCHANGE or AT_SIGNATURE. Possible values for this property are:

  • 1 - AT_KEYEXCHANGE
  • 2 - AT_SIGNATURE

The default value of this property is 1.

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MachineKeys
Function ComMachineKeys Returns Boolean
Procedure Set ComMachineKeys Boolean value
Introduced in version 9.5.0.83

If True, work with keys for the local computer. If False, work with keys for the current user. The default value is False.

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VerboseLogging
Function ComVerboseLogging Returns Boolean
Procedure Set ComVerboseLogging Boolean value

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

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Version
Function ComVersion Returns String

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

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Methods

DeleteKey
Function ComDeleteKey String keyName String storageProvider Returns Boolean
Introduced in version 9.5.0.83

Deletes a key from the storageProvider.

Returns True for success, False for failure.

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ExportKey
Function ComExportKey String keyName String storageProvider Boolean silentFlag cComPrivateKey key Returns Boolean
Introduced in version 9.5.0.83

Exports a key into key. If silentFlag is True, requests that the key service provider (KSP) not display any user interface. If the provider must display the UI to operate, the call fails

Returns True for success, False for failure.

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GenerateUuid
Function ComGenerateUuid Returns String

This method is provided as a convenient way of generating unique key container names. There are no set rules for naming key containers. However, if your application is to generate a large number of keys, using a UUID for the key container name is wise to ensure uniqueness.

Returns null on failure

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GetKeys
Function ComGetKeys String storageProvider cComChilkatJsonObject json Returns Boolean
Introduced in version 9.5.0.83

Loads json with a list of keys found in the given storageProvider.

Returns True for success, False for failure.

More Information and Examples
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GetStorageProviders
Function ComGetStorageProviders cComChilkatJsonObject json Returns Boolean
Introduced in version 9.5.0.83

Loads json with a list of storage providers on the Windows system.

The json will contain JSON such as this:

{
  "cng": [
    "Microsoft Software Key Storage Provider",
    "Microsoft Passport Key Storage Provider",
    "Microsoft Platform Crypto Provider",
    "Microsoft Smart Card Key Storage Provider"
  ],
  "legacy": [
    "Microsoft Base Cryptographic Provider v1.0",
    "Microsoft Base DSS and Diffie-Hellman Cryptographic Provider",
    "Microsoft Base DSS Cryptographic Provider",
    "Microsoft Base Smart Card Crypto Provider",
    "Microsoft DH SChannel Cryptographic Provider",
    "Microsoft Enhanced Cryptographic Provider v1.0",
    "Microsoft Enhanced DSS and Diffie-Hellman Cryptographic Provider",
    "Microsoft Enhanced RSA and AES Cryptographic Provider",
    "Microsoft RSA SChannel Cryptographic Provider",
    "Microsoft Strong Cryptographic Provider"
  ]
}

Returns True for success, False for failure.

More Information and Examples
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ImportKey
Function ComImportKey String keyName String storageProvider Boolean allowOverwrite Boolean allowExport cComPrivateKey key Returns Boolean
Introduced in version 9.5.0.83

Imports a new key into the storageProvider. If allowOverwrite is True, if a key already exists in the container with the specified name, the existing key will be overwritten. If allowOverwrite is False and the key already exists, then the method fails. If allowExport is True, then the key is marked as exportable, which allows for it to be re-exported to a PFX.

Returns True for success, False for failure.

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