XMLVerifier Component

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The XMLVerifier component verifies signed XML files.

Syntax

TsbxXMLVerifier

Remarks

Use this control to validate XML-SIG signatures. Note that this component only validates the signatures, but not the signing chains. To validate the signing chains, use XAdESVerifier.

Property List

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The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

Method List

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The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

Event List

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The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.

Config Settings

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The following is a list of config settings for the component with short descriptions. Click on the links for further details.

AllSignaturesValid Property (XMLVerifier Component)

The cumulative validity of all signatures.

Syntax

property AllSignaturesValid: Boolean read get_AllSignaturesValid;

Default Value

false

Remarks

Use this property to check if all the signatures found in the message or document are valid.

This property is read-only and not available at design time.

AutoValidateSignatures Property (XMLVerifier Component)

Specifies whether component should validate any present signatures when the document is opened.

Syntax

property AutoValidateSignatures: Boolean read get_AutoValidateSignatures write set_AutoValidateSignatures;

Default Value

true

Remarks

This setting is switched on by default. You can choose to set this property to false in order to validate the signatures manually on a later stage using the Revalidate method.

Certificates Property (XMLVerifier Component)

A collection of certificates included in the electronic signature.

Syntax

property Certificates: TsbxCertificateList read get_Certificates;

Remarks

Use this property to access all certificates included into the signature(s) by its creator.

This property is read-only and not available at design time.

Please refer to the Certificate type for a complete list of fields.

DataBytes Property (XMLVerifier Component)

Use this property to pass the external data to component in the byte array form.

Syntax

property DataBytes: TBytes read get_DataBytes write set_DataBytes;

Remarks

Assign a byte array containing the external data to be processed to this property.

This property is not available at design time.

DataFile Property (XMLVerifier Component)

A file containing the external data covered by a detached signature.

Syntax

property DataFile: String read get_DataFile write set_DataFile;

Default Value

''

Remarks

In the case of a detached signature, use this property to provide the external data to the component from a file. Alternatively, provide the data via DataStream.

DataType Property (XMLVerifier Component)

Specifies the external data type.

Syntax

property DataType: TsbxXMLDataTypes read get_DataType write set_DataType;

TsbxXMLDataTypes = (
  cxdtXML,
  cxdtBinary,
  cxdtBase64
);

Default Value

cxdtXML

Remarks

Use this property to specify the type of the external data (either DataFile, DataStream or DataBytes properties) for component.

DataURI Property (XMLVerifier Component)

Specifies a detached data resource URI.

Syntax

property DataURI: String read get_DataURI write set_DataURI;

Default Value

''

Remarks

Specifies a URI used for data being signed, usually the data filename if stored along with a detached signature.

Encoding Property (XMLVerifier Component)

Specifies XML encoding.

Syntax

property Encoding: String read get_Encoding write set_Encoding;

Default Value

''

Remarks

Use this property to specify the encoding to apply to the XML documents.

FIPSMode Property (XMLVerifier Component)

Reserved.

Syntax

property FIPSMode: Boolean read get_FIPSMode write set_FIPSMode;

Default Value

false

Remarks

This property is reserved for future use.

InputBytes Property (XMLVerifier Component)

Use this property to pass the input to component in byte array form.

Syntax

property InputBytes: TBytes read get_InputBytes write set_InputBytes;

Remarks

Assign a byte array containing the data to be processed to this property.

This property is not available at design time.

InputFile Property (XMLVerifier Component)

A signed XML file.

Syntax

property InputFile: String read get_InputFile write set_InputFile;

Default Value

''

Remarks

Provide a path to the signed XML document in this property.

KnownCertificates Property (XMLVerifier Component)

Additional certificates for chain validation.

Syntax

property KnownCertificates: TsbxCertificateList read get_KnownCertificates write set_KnownCertificates;

Remarks

Use this property to supply a list of additional certificates that might be needed for chain validation. An example of a scenario where you might want to do that is when intermediary CA certificates are absent from the standard system locations (or when there are no standard system locations), and therefore should be supplied to the component manually.

The purpose of the certificates to be added to this collection is roughly equivalent to that of the Intermediate Certification Authorities system store in Windows.

Do not add trust anchors or root certificates to this collection: add them to TrustedCertificates instead.

This property is not available at design time.

Please refer to the Certificate type for a complete list of fields.

OutputBytes Property (XMLVerifier Component)

Use this property to read the output the component object has produced.

Syntax

property OutputBytes: TBytes read get_OutputBytes;

Remarks

Read the contents of this property after the operation has completed to read the produced output. This property will only be set if the OutputFile and OutputStream properties had not been assigned.

This property is read-only and not available at design time.

OutputFile Property (XMLVerifier Component)

The file where the modified signed document will be saved.

Syntax

property OutputFile: String read get_OutputFile write set_OutputFile;

Default Value

''

Remarks

Provide the full path to the file where the modified signed document should be saved.

References Property (XMLVerifier Component)

References covered by the signature.

Syntax

property References: TsbxXMLReferenceList read get_References;

Remarks

Use this property to get the references to the data covered by the signature.

This property is read-only and not available at design time.

Please refer to the XMLReference type for a complete list of fields.

Signatures Property (XMLVerifier Component)

All signatures found in the XML document.

Syntax

property Signatures: TsbxXMLSignatureList read get_Signatures;

Remarks

This property contains a list of all signatures made over the XML document.

This property is read-only and not available at design time.

Please refer to the XMLSignature type for a complete list of fields.

XPathNamespaces Property (XMLVerifier Component)

Specifies namespaces for the XPath expression.

Syntax

property XPathNamespaces: TsbxXMLNamespaceList read get_XPathNamespaces write set_XPathNamespaces;

Remarks

This property contains a list of prefixes and namespaceURIs that are used in XPath expression with TargetXMLElement property of the references.

This property is not available at design time.

Please refer to the XMLNamespace type for a complete list of fields.

Close Method (XMLVerifier Component)

Closes an opened document.

Syntax

procedure Close(SaveChanges: Boolean);

Remarks

Use this method to close a previously opened document. Set SaveChanges to true to apply any changes made.

Config Method (XMLVerifier Component)

Sets or retrieves a configuration setting.

Syntax

function Config(ConfigurationString: String): String;

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

DoAction Method (XMLVerifier Component)

Performs an additional action.

Syntax

function DoAction(ActionID: String; ActionParams: String): String;

Remarks

DoAction is a generic method available in every component. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.

The unique identifier (case insensitive) of the action is provided in the ActionID parameter.

ActionParams contains the value of a single parameter, or a list of multiple parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....

GetInnerXML Method (XMLVerifier Component)

Get the inner XML content of the selected XML element.

Syntax

function GetInnerXML(XPath: String): String;

Remarks

Call this method to get the inner XML content of the selected XML element.

GetOuterXML Method (XMLVerifier Component)

Get the outer XML content of the selected XML element.

Syntax

function GetOuterXML(XPath: String): String;

Remarks

Call this method to get the outer XML content of the selected XML element.

GetTextContent Method (XMLVerifier Component)

Get the text content of the selected XML element.

Syntax

function GetTextContent(XPath: String): String;

Remarks

Call this method to get the text content of the selected XML element.

Open Method (XMLVerifier Component)

Opens a document for verifying or removing signatures.

Syntax

procedure Open();

Remarks

Use this method to open a document for verifying or removing signatures. When finished, call Close to complete or discard the operation.

Revalidate Method (XMLVerifier Component)

Revalidates a signature in accordance with current settings.

Syntax

procedure Revalidate(Index: Integer; Detached: Boolean);

Remarks

Use this method to re-validate a signature in the opened XML document.

SetInnerXML Method (XMLVerifier Component)

Set the inner XML content of the selected XML element.

Syntax

procedure SetInnerXML(XPath: String; Value: String);

Remarks

Call this method to set the inner XML content of the selected XML element.

SetTextContent Method (XMLVerifier Component)

Set the text content of the selected XML element.

Syntax

procedure SetTextContent(XPath: String; Value: String);

Remarks

Call this method to set the text content of the selected XML element.

Unsign Method (XMLVerifier Component)

Deletes a signature from the document.

Syntax

procedure Unsign(SigIndex: Integer);

Remarks

Use this method to delete an existing signature from the document. Use SigIndex parameter to specify the signature to be removed.

Verify Method (XMLVerifier Component)

Verifies a signed XML document.

Syntax

procedure Verify();

Remarks

Call this method to verify the signature embedded in the document. Pass the document via InputStream or InputFile property. Use VerifyDetached to verify the external data in case of a detached signature.

VerifyDetached Method (XMLVerifier Component)

Verifies a detached signature over external XML data.

Syntax

procedure VerifyDetached();

Remarks

Call this method to verify a signature over external (detached) data provided via DataStream or DataFile.

DocumentLoaded Event (XMLVerifier Component)

This event is fired when the document has been loaded into memory.

Syntax

type TDocumentLoadedEvent = procedure (
  Sender: TObject;
  var Cancel: Boolean
) of Object;

property OnDocumentLoaded: TDocumentLoadedEvent read FOnDocumentLoaded write FOnDocumentLoaded;

Remarks

The handler for this event is a good place to check document properties, which may be useful when preparing the signature, for example, the document format.

Set Cancel to true to terminate document processing on this stage.

Error Event (XMLVerifier Component)

Information about errors during signature verification.

Syntax

type TErrorEvent = procedure (
  Sender: TObject;
  ErrorCode: Integer;
  const Description: String
) of Object;

property OnError: TErrorEvent read FOnError write FOnError;

Remarks

The event is fired in case of exceptional conditions during verification.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to XML.

Notification Event (XMLVerifier Component)

This event notifies the application about an underlying control flow event.

Syntax

type TNotificationEvent = procedure (
  Sender: TObject;
  const EventID: String;
  const EventParam: String
) of Object;

property OnNotification: TNotificationEvent read FOnNotification write FOnNotification;

Remarks

The component fires this event to let the application know about some event, occurrence, or milestone in the component. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.

The unique identifier of the event is provided in the EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the component, the exact action it is performing, or the document being processed, one or both may be omitted.

ReferenceValidated Event (XMLVerifier Component)

Marks the end of a reference validation.

Syntax

type TReferenceValidatedEvent = procedure (
  Sender: TObject;
  ReferenceIndex: Integer;
  const ID: String;
  const URI: String;
  const RefType: String;
  DigestValid: Boolean
) of Object;

property OnReferenceValidated: TReferenceValidatedEvent read FOnReferenceValidated write FOnReferenceValidated;

Remarks

The component fires this event to report completion of a reference validation. A reference is a building block of a signature as it binds signature coverage to a particular piece of the document.

ResolveReference Event (XMLVerifier Component)

Asks the application to resolve a reference.

Syntax

type TResolveReferenceEvent = procedure (
  Sender: TObject;
  ReferenceIndex: Integer;
  const URI: String
) of Object;

property OnResolveReference: TResolveReferenceEvent read FOnResolveReference write FOnResolveReference;

Remarks

This event is fired when the control could not automatically resolve a reference and requires custom treatment.

URI contains a reference to the data.

ReferenceIndex specifies the index of the reference to process.

Based on the reference's URI the event handler should set either TargetXMLElement or TargetData property of the reference.

SignatureFound Event (XMLVerifier Component)

Signifies the start of signature validation.

Syntax

type TSignatureFoundEvent = procedure (
  Sender: TObject;
  Index: Integer;
  const IssuerRDN: String;
  SerialNumber: TBytes;
  SubjectKeyID: TBytes;
  CertFound: Boolean;
  var ValidateSignature: Boolean;
  var ValidateChain: Boolean
) of Object;

property OnSignatureFound: TSignatureFoundEvent read FOnSignatureFound write FOnSignatureFound;

Remarks

This event tells the application that signature validation is about to start, and provides the details about the signer's certificate via its IssuerRDN, SerialNumber, and SubjectKeyID parameters. It fires for every signature located in the verified document or message.

The CertFound parameter is set to True if the component has found the needed certificate in one of the known locations, and to False otherwise, in which case you must provide it manually via the KnownCertificates property.

Signature validation consists of two independent stages: cryptographic signature validation and chain validation. Separate validation results are reported for each, with the SignatureValidationResult and ChainValidationResult properties respectively.

Use the ValidateSignature and ValidateChain parameters to tell the verifier which stages to include in the validation.

SignatureValidated Event (XMLVerifier Component)

Reports the signature validation result.

Syntax

type TSignatureValidatedEvent = procedure (
  Sender: TObject;
  SigIndex: Integer;
  const IssuerRDN: String;
  SerialNumber: TBytes;
  SubjectKeyID: TBytes;
  ValidationResult: Integer
) of Object;

property OnSignatureValidated: TSignatureValidatedEvent read FOnSignatureValidated write FOnSignatureValidated;

Remarks

This event is fired when the complete XML signature validation process is finished. IssuerRDN returns the name of the signature issuer, SerialNumber identifies the signing certificate, SubjectKeyID contains the key identifier (SecureBlackbox uses SHA-1 hash algorithm output as key identifiers). Finally, ValidationResult specifies whether signature is valid or not:

Certificate Type

Provides details of an individual X.509 certificate.

Remarks

This type provides access to X.509 certificate details.

Fields

Constructors

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constructor Create();

Creates a new object with default field values.

XMLNamespace Type

Represents an XML namespace map for XPath expressions.

Remarks

This class defines the correspondence between Prefixes and namespace URIs.

Fields

Constructors

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constructor Create();

Creates a new XML namespace object.

XMLReference Type

Represents an XML reference element.

Remarks

XMLReference specifies the digest algorithm and digest value, and, optionally: an identifier of the object being signed, the type of the object, and/or a list of transforms to be applied prior to digesting.

Fields

Constructors

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constructor Create();

Creates a new XML reference element.

>

constructor Create(valID: String);

Creates a new XML reference element from its ID .

>

constructor Create(valID: String; valURI: String);

Creates a new XML reference element from its ID and URI reference to the external data.

XMLSignature Type

The component is a container for an XML signature.

Remarks

XML document may include any number of XML signatures. component stores on of them.

Fields

Constructors

>

constructor Create();

Creates a new XML signature object.

Config Settings (XMLVerifier Component)

The component accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

XMLVerifier Config Settings

Base Config Settings

Trappable Errors (XMLVerifier Component)

XMLVerifier Errors

	1048577   Invalid parameter value (SB_ERROR_INVALID_PARAMETER)
	1048578   Component is configured incorrectly (SB_ERROR_INVALID_SETUP)
	1048579   Operation cannot be executed in the current state (SB_ERROR_INVALID_STATE)
	1048580   Attempt to set an invalid value to a property (SB_ERROR_INVALID_VALUE)
	1048581   Certificate does not have its private key loaded (SB_ERROR_NO_PRIVATE_KEY)
	1048581   Cancelled by the user (SB_ERROR_CANCELLED_BY_USER) 
	39845889   Input file does not exist (SB_ERROR_XML_INPUTFILE_NOT_EXISTS)
	39845890   Data file does not exist (SB_ERROR_XML_DATAFILE_NOT_EXISTS)
	39845891   Unsupported signature method type (SB_ERROR_XML_UNSUPPORTED_SIGNATURE_METHOD_TYPE)
	39845892   Unsupported has algorithm (SB_ERROR_XML_UNSUPPORTED_HASH_ALGORITHM)
	39845893   Unsupported key type (SB_ERROR_XML_UNSUPPORTED_KEY_TYPE)
	39845894   Invalid key type (SB_ERROR_XML_INVALID_KEY_TYPE)
	39845895   Invalid encryption method (SB_ERROR_XML_INVALID_ENCRYPTION_METHOD)
	39845896   Not found (SB_ERROR_XML_NOT_FOUND)
	39845897   No element ID (SB_ERROR_XML_NO_ELEMENT_ID)