XMLSig Class

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The XMLSig class is used to sign XML and verify signed XML.

Syntax

ipworksencrypt.Xmlsig

Remarks

The XMLSig component provides an easy to use API for signing and verifying signed XML. The Sign method will create signed XML with an enveloped signature. The VerifySignature method will attempt to verify the signature(s) within a XML document.

Sign

Before calling Sign specify the XML to sign by calling SetInputStream or setting InputFile, or InputXML.

The References property must be set. At least one reference must be set. A reference defines the XML element to sign, and the options that specify how it is transformed and hashed during the signing process.

Set Certificate to a certificate with private key.

Optionally set the CanonicalizationMethod. This determines how the signature itself is canonicalized. SigningAlgorithm defines the algorithm used to sign. The SignatureXPath property may be set to specify the location in the XML document where the signature will be placed.

Lastly, call Sign to sign the XML.

The following properties are applicable when calling this method:

• CanonicalizationMethod
• Certificate (required)
• References (required)
• SignatureXPath
• SigningAlgorithm

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

Verify a Signature

When VerifySignature is called, the class will scan the XML document and fire the SignatureInfo event for each signature that is found. When the SignatureInfo event fires the References collection will be populated.

Within the SignatureInfo event the XMLElement field must be set to the location of the XML element to which the signature applies. The URI field may contain data helpful to locating the XML element.

The XMLElement field specifies the XPath to the element. For instance:

The signature is verified either using a key parsed from the signed XML, or using the certificate specified by the SignerCert property. The class will automatically parse the signer certificate (if present) from the signed XML and populate the SignerCert property with the parsed value.

When SignatureInfo fires, if the SignerCertParsed parameter is True the SignerCert property may be inspected to see the details of the parsed certificate. If SignerCertParsed is False, then the SignerCert property must be set to a valid certificate for signature verification to proceed.

When the SignatureInfo event finishes firing, the certificate present in the SignerCert property will be used to verify the signature, whether this is the certificate automatically parsed by the class or a different certificate specified within the event.

If the signature was successfully verified the method will return without error. If the signature was not verified the method throws an exception.

Property List

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

Method List

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

Event List

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

Config Settings

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

CanonicalizationMethod Property (XMLSig Class)

The canonicalization method applied to the signature.

Syntax

public int getCanonicalizationMethod();


public void setCanonicalizationMethod(int canonicalizationMethod);


Enumerated values:
  public final static int cmC14N = 0;
  public final static int cmC14NComments = 1;
  public final static int cmC14N11 = 2;
  public final static int cmC14N11Comments = 3;
  public final static int cmExcC14N = 4;
  public final static int cmExcC14NComments = 5;

Default Value

0

Remarks

This property specifies the canonicalization method that is applied to the signature. This may be set before calling Sign. This will be set automatically after calling VerifySignature. Possible values are:

This property is not available at design time.

Certificate Property (XMLSig Class)

The certificate used for signing.

Syntax

public Certificate getCertificate();


public void setCertificate(Certificate certificate);

Remarks

This property specifies a certificate with private key.

This must be set before calling Sign.

HMACKey Property (XMLSig Class)

The HMAC key used with the 'HMAC-SHA1' signing algorithm.

Syntax

public byte[] getHMACKey();


public void setHMACKey(byte[] HMACKey);

Default Value

""

Remarks

This property defines the HMAC key to be used when SigningAlgorithm is set to "HMAC-SHA1". This must be set before calling before calling Sign.

This property is also applicable when calling VerifySignature. This may be set before calling VerifySignature or from within the SignatureInfo event.

This property is not available at design time.

InputFile Property (XMLSig Class)

The XML file to process.

Syntax

public String getInputFile();


public void setInputFile(String inputFile);

Default Value

""

Remarks

This property specifies the file to be processed. Set this property to the full or relative path to the file which will be processed.

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

This property is not available at design time.

InputXML Property (XMLSig Class)

The XML to process.

Syntax

public String getInputXML();


public void setInputXML(String inputXML);

Default Value

""

Remarks

This property specifies the XML to be processed.

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

This property is not available at design time.

OutputFile Property (XMLSig Class)

The output file.

Syntax

public String getOutputFile();


public void setOutputFile(String outputFile);

Default Value

""

Remarks

This property specifies the file to which the output will be written. This may be set to an absolute or relative path.

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

This property is not available at design time.

OutputXML Property (XMLSig Class)

The output XML after processing.

Syntax

public String getOutputXML();


public void setOutputXML(String outputXML);

Default Value

""

Remarks

This property will be populated with the output from the operation if OutputFile and SetOutputStream are not set.

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

This property is not available at design time.

Overwrite Property (XMLSig Class)

Indicates whether or not the class should overwrite files.

Syntax

public boolean isOverwrite();


public void setOverwrite(boolean overwrite);

Default Value

False

Remarks

This property indicates whether or not the class will overwrite OutputFile. If Overwrite is False, an error will be thrown whenever OutputFile exists before an operation. The default value is False.

References Property (XMLSig Class)

A collection of references.

Syntax

public XMLSigReferenceList getReferences();


public void setReferences(XMLSigReferenceList references);

Remarks

This property holds a collection of reference to sign or verify. This must be populated before calling Sign. This will be populated by the class when calling VerifySignature and is accessible from within the SignatureInfo event.

This property is not available at design time.

SignatureXPath Property (XMLSig Class)

The XPath of the signature.

Syntax

public String getSignatureXPath();


public void setSignatureXPath(String signatureXPath);

Default Value

"/"

Remarks

This property specifies the XPath in the XML where the signature will be placed.

This may be set before calling Sign. This property will be populated when calling VerifySignature.

The default value is "/".

This property is not available at design time.

SignerCert Property (XMLSig Class)

The certificate used for signature verification.

Syntax

public Certificate getSignerCert();


public void setSignerCert(Certificate signerCert);

Remarks

This property specifies a certificate for signature verification.

This may be set from within the SignatureInfo event after calling VerifySignature. If the signed XML already includes a public key to use for verification, then this property will be automatically populated and does not need to be set. Check the SignatureInfo event to determine if a public key was parsed from the signed XML. If a public key was not automatically parsed, set this property to the signer's certificate from within the event.

SigningAlgorithm Property (XMLSig Class)

The signing algorithm.

Syntax

public String getSigningAlgorithm();


public void setSigningAlgorithm(String signingAlgorithm);

Default Value

""

Remarks

This property specifies the signing algorithm.

This may be set before calling Sign. This value will be set after calling VerifySignature. Possible values are:

• "RSA-SHA1" (default)
• "RSA-SHA256"
• "DSA-SHA1"
• "HMAC-SHA1"

This property is not available at design time.

Config Method (Xmlsig Class)

Sets or retrieves a configuration setting.

Syntax

public String config(String configurationString);

Remarks

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

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, 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.

DoEvents Method (Xmlsig Class)

Processes events from the internal message queue.

Syntax

public void doEvents();

Remarks

When DoEvents is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

Reset Method (Xmlsig Class)

Resets the class.

Syntax

public void reset();

Remarks

When called, the component will reset all of its properties to their default values.

SetInputStream Method (Xmlsig Class)

Sets the stream from which the class will read data to sign or verify.

Syntax

public void setInputStream(java.io.InputStream inputStream);

Remarks

This method sets the stream from which the class will read data to sign or verify. If an input stream is set before calling Sign or VerifySignature, the data is read from the input stream instead of from the InputFile or InputXML properties.

The content of the stream will be read from the current position all the way to the end and no bytes will be skipped.

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

SetOutputStream Method (Xmlsig Class)

The stream to which the class will write the signed or verified XML.

Syntax

public void setOutputStream(java.io.OutputStream outputStream);

Remarks

This method sets the stream to which the class will write the signed or verified XML. If an output stream is set before calling Sign or VerifySignature, the class will write the data to the output stream instead of populating OutputXML or writing to OutputFile.

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

Sign Method (Xmlsig Class)

Signs the XML.

Syntax

public void sign();

Remarks

This methods signs the XML.

Before calling Sign specify the XML to sign by calling SetInputStream or setting InputFile, or InputXML.

The References property must be set. At least one reference must be set. A reference defines the XML element to sign, and the options that specify how it is transformed and hashed during the signing process.

Set Certificate to a certificate with private key.

Optionally set the CanonicalizationMethod. This determines how the signature itself is canonicalized. SigningAlgorithm defines the algorithm used to sign. The SignatureXPath property may be set to specify the location in the XML document where the signature will be placed.

Lastly, call Sign to sign the XML.

The following properties are applicable when calling this method:

• CanonicalizationMethod
• Certificate (required)
• References (required)
• SignatureXPath
• SigningAlgorithm

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputXML

• SetOutputStream
• OutputFile
• OutputXML: The output data is written to this property if no other destination is specified.

VerifySignature Method (Xmlsig Class)

Verifies signed XML.

Syntax

public void verifySignature();

Remarks

This method verifies signatures contained in the XML.

When VerifySignature is called, the class will scan the XML document and fire the SignatureInfo event for each signature that is found. When the SignatureInfo event fires the References collection will be populated.

Within the SignatureInfo event the XMLElement field must be set to the location of the XML element to which the signature applies. The URI field may contain data helpful to locating the XML element.

The XMLElement field specifies the XPath to the element. For instance:

The signature is verified either using a key parsed from the signed XML, or using the certificate specified by the SignerCert property. The class will automatically parse the signer certificate (if present) from the signed XML and populate the SignerCert property with the parsed value.

When SignatureInfo fires, if the SignerCertParsed parameter is True the SignerCert property may be inspected to see the details of the parsed certificate. If SignerCertParsed is False, then the SignerCert property must be set to a valid certificate for signature verification to proceed.

When the SignatureInfo event finishes firing, the certificate present in the SignerCert property will be used to verify the signature, whether this is the certificate automatically parsed by the class or a different certificate specified within the event.

If the signature was successfully verified the method will return without error. If the signature was not verified the method throws an exception.

Error Event (Xmlsig Class)

Information about errors during data delivery.

Syntax

public class DefaultXmlsigEventListener implements XmlsigEventListener {
  ...
  public void error(XmlsigErrorEvent e) {}
  ...
}

public class XmlsigErrorEvent {
  public int errorCode;
  public String description;
}

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class throws an exception.

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 the Error Codes section.

Progress Event (Xmlsig Class)

Fired as progress is made.

Syntax

public class DefaultXmlsigEventListener implements XmlsigEventListener {
  ...
  public void progress(XmlsigProgressEvent e) {}
  ...
}

public class XmlsigProgressEvent {
  public long bytesProcessed;
  public int percentProcessed;
  public int operation;
  public boolean isEOF;
}

Remarks

This event is fired automatically as data is processed by the class.

The PercentProcessed parameter indicates the current status of the operation.

The BytesProcessed parameter holds the total number of bytes processed so far.

The Operation parameter is only applicable when either ReadFromProgressEvent or WriteToProgressEvent is set to True. This parameter defines whether a Read or Write operation is required. If the configuration settings are not set this parameter will always return 0. Possible values are:

The IsEOF parameter is only applicable when either ReadFromProgressEvent or WriteToProgressEvent is set to True. This parameter defines whether the Read or Write operation is complete. When the Operation is Read (1) this parameter must be set to indicate that all data has been supplied to the class. When the Operation is Write (2) this value may be queried to determine when all data has been processed.

SignatureInfo Event (Xmlsig Class)

Fired when a signature is found.

Syntax

public class DefaultXmlsigEventListener implements XmlsigEventListener {
  ...
  public void signatureInfo(XmlsigSignatureInfoEvent e) {}
  ...
}

public class XmlsigSignatureInfoEvent {
  public String signatureId;
  public boolean signerCertParsed;
}

Remarks

This event fires when calling VerifySignature for each signature found within the XML document.

SignatureId is the id of the signature.

SignerCertParsed indicates whether the signer's certificate was automatically parsed from the signed XML.

Verification Notes

When VerifySignature is called, the class will scan the XML document and fire the SignatureInfo event for each signature that is found. When the SignatureInfo event fires the References collection will be populated.

Within the SignatureInfo event the XMLElement field must be set to the location of the XML element to which the signature applies. The URI field may contain data helpful to locating the XML element.

The XMLElement field specifies the XPath to the element. For instance:

The signature is verified either using a key parsed from the signed XML, or using the certificate specified by the SignerCert property. The class will automatically parse the signer certificate (if present) from the signed XML and populate the SignerCert property with the parsed value.

When SignatureInfo fires, if the SignerCertParsed parameter is True the SignerCert property may be inspected to see the details of the parsed certificate. If SignerCertParsed is False, then the SignerCert property must be set to a valid certificate for signature verification to proceed.

When the SignatureInfo event finishes firing, the certificate present in the SignerCert property will be used to verify the signature, whether this is the certificate automatically parsed by the class or a different certificate specified within the event.

If the signature was successfully verified the method will return without error. If the signature was not verified the method throws an exception.

Status Event (Xmlsig Class)

Provides information about the current operation.

Syntax

public class DefaultXmlsigEventListener implements XmlsigEventListener {
  ...
  public void status(XmlsigStatusEvent e) {}
  ...
}

public class XmlsigStatusEvent {
  public String message;
}

Remarks

The event is fired for informational and logging purposes only. It may be used to track the progress of an operation.

The level of detail is controlled by the LogLevel setting.

Certificate Type

This is the digital certificate being used.

Remarks

This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.

Fields

Constructors

public Certificate();

Creates a Certificate instance whose properties can be set. This is useful for use with CERTMGR when generating new certificates.

public Certificate( certificateFile);

Opens CertificateFile and reads out the contents as an X509 public key.

public Certificate( certificateData);

Parses CertificateData as an X509 public key.

public Certificate( certStoreType,  store,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. ConfigurationString is a newline separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CyrptoAPI option. The default value is True (the key is persisted). "Thumbprint" - a MD5, SHA1, or SHA256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to cstUser, cstMachine, cstPublicKeyFile, and cstPFXFile store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

public Certificate( certStoreType,  storeBlob,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a string (binary- or base64-encoded) containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

XMLSigReference Type

This type defines information about the reference.

Remarks

This type defines information about the reference including the location within the document (XMLElement), TransformAlgorithms, HashAlgorithm, and URI.

Fields

Constructors

public XMLSigReference();

public XMLSigReference( XMLElement,  URI,  hashAlgorithm,  transformAlgorithms,  hashValue);

Config Settings (Xmlsig Class)

XMLSig Config Settings

<root>
  <node1>
    <ds:Signature>...</ds:Signature>
  </node1>
  <node2></node2>
  <node3></node3>
</root>

<root>
  <node1></node1>
  <ds:Signature>...</ds:Signature>
  <node2></node2>
  <node3></node3>
</root>

Base Config Settings

Trappable Errors (Xmlsig Class)

XMLSig Errors

XML Errors