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org.apache.xml.security.signature
Class XMLSignature

java.lang.Object
  extended byorg.apache.xml.security.utils.ElementProxy
      extended byorg.apache.xml.security.utils.SignatureElementProxy
          extended byorg.apache.xml.security.signature.XMLSignature
public final class XMLSignature
extends SignatureElementProxy

Handles <ds:Signature> elements. This is the main class that deals with creating and verifying signatures.

There are 2 types of constructors for this class. The ones that take a document, baseURI and 1 or more Java Objects. This is mostly used for signing purposes. The other constructor is the one that takes a DOM Element and a BaseURI. This is used mostly with for verifying, when you have a SignatureElement. There are a few different types of methods:

Author:
$Author: mullan $

Field Summary
static java.lang.String ALGO_ID_MAC_HMAC_NOT_RECOMMENDED_MD5
          HMAC - NOT Recommended HMAC-MD5
static java.lang.String ALGO_ID_MAC_HMAC_RIPEMD160
          HMAC - Optional HMAC-RIPEMD160
static java.lang.String ALGO_ID_MAC_HMAC_SHA1
          MAC - Required HMAC-SHA1
static java.lang.String ALGO_ID_MAC_HMAC_SHA256
          HMAC - Optional HMAC-SHA256
static java.lang.String ALGO_ID_MAC_HMAC_SHA384
          HMAC - Optional HMAC-SHA284
static java.lang.String ALGO_ID_MAC_HMAC_SHA512
          HMAC - Optional HMAC-SHA512
static java.lang.String ALGO_ID_SIGNATURE_DSA
          Signature - Required DSAwithSHA1 (DSS)
static java.lang.String ALGO_ID_SIGNATURE_ECDSA_SHA1
          Signature - Optional ECDSAwithSHA1
static java.lang.String ALGO_ID_SIGNATURE_NOT_RECOMMENDED_RSA_MD5
          Signature - NOT Recommended RSAwithMD5
static java.lang.String ALGO_ID_SIGNATURE_RSA
          Signature - Recommended RSAwithSHA1
static java.lang.String ALGO_ID_SIGNATURE_RSA_RIPEMD160
          Signature - Optional RSAwithRIPEMD160
static java.lang.String ALGO_ID_SIGNATURE_RSA_SHA1
          Signature - Recommended RSAwithSHA1
static java.lang.String ALGO_ID_SIGNATURE_RSA_SHA256
          Signature - Optional RSAwithSHA256
static java.lang.String ALGO_ID_SIGNATURE_RSA_SHA384
          Signature - Optional RSAwithSHA384
static java.lang.String ALGO_ID_SIGNATURE_RSA_SHA512
          Signature - Optional RSAwithSHA512
 
Fields inherited from class org.apache.xml.security.utils.ElementProxy
_baseURI, _constructionElement, _doc
 
Constructor Summary
XMLSignature(org.w3c.dom.Document doc, java.lang.String BaseURI, org.w3c.dom.Element SignatureMethodElem, org.w3c.dom.Element CanonicalizationMethodElem)
          Creates a XMLSignature in a Document
XMLSignature(org.w3c.dom.Document doc, java.lang.String BaseURI, java.lang.String SignatureMethodURI)
          This creates a new ds:Signature Element and adds an empty ds:SignedInfo.
XMLSignature(org.w3c.dom.Document doc, java.lang.String BaseURI, java.lang.String SignatureMethodURI, int HMACOutputLength)
          Constructor XMLSignature
XMLSignature(org.w3c.dom.Document doc, java.lang.String BaseURI, java.lang.String SignatureMethodURI, int HMACOutputLength, java.lang.String CanonicalizationMethodURI)
          Constructor XMLSignature
XMLSignature(org.w3c.dom.Document doc, java.lang.String BaseURI, java.lang.String SignatureMethodURI, java.lang.String CanonicalizationMethodURI)
          Constructor XMLSignature
XMLSignature(org.w3c.dom.Element element, java.lang.String BaseURI)
          This will parse the element and construct the Java Objects.
 
Method Summary
 void addDocument(java.lang.String referenceURI)
          Add a Reference with just this URI.
 void addDocument(java.lang.String referenceURI, Transforms trans)
          Adds a Reference with just the URI and the transforms.
 void addDocument(java.lang.String referenceURI, Transforms trans, java.lang.String digestURI)
          This method is a proxy method for the Manifest.addDocument(java.lang.String, java.lang.String, org.apache.xml.security.transforms.Transforms, java.lang.String, java.lang.String, java.lang.String) method.
 void addDocument(java.lang.String referenceURI, Transforms trans, java.lang.String digestURI, java.lang.String ReferenceId, java.lang.String ReferenceType)
          Add a Reference with full parameters to this Signature
 void addKeyInfo(java.security.PublicKey pk)
          Add this public key to the KeyInfo.
 void addKeyInfo(java.security.cert.X509Certificate cert)
          Add an X509 Certificate to the KeyInfo.
 void addResourceResolver(ResourceResolver resolver)
          Adds a ResourceResolver to enable the retrieval of resources.
 void addResourceResolver(ResourceResolverSpi resolver)
          Adds a ResourceResolverSpi to enable the retrieval of resources.
 void appendObject(ObjectContainer object)
          Appends an Object (not a java.lang.Object but an Object element) to the Signature.
 boolean checkSignatureValue(java.security.Key pk)
          Verifies if the signature is valid by redigesting all References, comparing those against the stored DigestValues and then checking to see if the Signatures match on the SignedInfo.
 boolean checkSignatureValue(java.security.cert.X509Certificate cert)
          Extracts the public key from the certificate and verifies if the signature is valid by re-digesting all References, comparing those against the stored DigestValues and then checking to see if the Signatures match on the SignedInfo.
 javax.crypto.SecretKey createSecretKey(byte[] secretKeyBytes)
          Proxy method for SignedInfo.createSecretKey(byte[]).
 java.lang.String getBaseLocalName()
          Get the local name of this element
 java.lang.String getId()
          Returns the Id attribute
 KeyInfo getKeyInfo()
          Returns the KeyInfo child.
 ObjectContainer getObjectItem(int i)
          Returns the ith ds:Object child of the signature or null if no such ds:Object element exists.
 int getObjectLength()
          Returns the number of all ds:Object elements.
 byte[] getSignatureValue()
          Returns the octet value of the SignatureValue element.
 SignedInfo getSignedInfo()
          Returns the completely parsed SignedInfo object.
 void setFollowNestedManifests(boolean followManifests)
          Signal wether Manifest should be automatically validated.
 void setId(java.lang.String id)
          Sets the Id attribute
 void sign(java.security.Key signingKey)
          Digests all References in the SignedInfo, calculates the signature value and sets it in the SignatureValue Element.
 
Methods inherited from class org.apache.xml.security.utils.SignatureElementProxy
getBaseNamespace
 
Methods inherited from class org.apache.xml.security.utils.ElementProxy
addBase64Element, addBase64Text, addBigIntegerElement, addText, addTextElement, createElementForFamily, createElementForFamilyLocal, getBaseURI, getBigIntegerFromChildElement, getBytesFromChildElement, getBytesFromTextChild, getDefaultPrefix, getDefaultPrefixBindings, getDocument, getElement, getElementPlusReturns, getTextFromChildElement, getTextFromTextChild, length, setDefaultPrefix, setElement, setXPathNamespaceContext
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

ALGO_ID_MAC_HMAC_SHA1

public static final java.lang.String ALGO_ID_MAC_HMAC_SHA1
MAC - Required HMAC-SHA1

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_DSA

public static final java.lang.String ALGO_ID_SIGNATURE_DSA
Signature - Required DSAwithSHA1 (DSS)

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_RSA

public static final java.lang.String ALGO_ID_SIGNATURE_RSA
Signature - Recommended RSAwithSHA1

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_RSA_SHA1

public static final java.lang.String ALGO_ID_SIGNATURE_RSA_SHA1
Signature - Recommended RSAwithSHA1

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_NOT_RECOMMENDED_RSA_MD5

public static final java.lang.String ALGO_ID_SIGNATURE_NOT_RECOMMENDED_RSA_MD5
Signature - NOT Recommended RSAwithMD5

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_RSA_RIPEMD160

public static final java.lang.String ALGO_ID_SIGNATURE_RSA_RIPEMD160
Signature - Optional RSAwithRIPEMD160

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_RSA_SHA256

public static final java.lang.String ALGO_ID_SIGNATURE_RSA_SHA256
Signature - Optional RSAwithSHA256

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_RSA_SHA384

public static final java.lang.String ALGO_ID_SIGNATURE_RSA_SHA384
Signature - Optional RSAwithSHA384

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_RSA_SHA512

public static final java.lang.String ALGO_ID_SIGNATURE_RSA_SHA512
Signature - Optional RSAwithSHA512

See Also:
Constant Field Values

ALGO_ID_MAC_HMAC_NOT_RECOMMENDED_MD5

public static final java.lang.String ALGO_ID_MAC_HMAC_NOT_RECOMMENDED_MD5
HMAC - NOT Recommended HMAC-MD5

See Also:
Constant Field Values

ALGO_ID_MAC_HMAC_RIPEMD160

public static final java.lang.String ALGO_ID_MAC_HMAC_RIPEMD160
HMAC - Optional HMAC-RIPEMD160

See Also:
Constant Field Values

ALGO_ID_MAC_HMAC_SHA256

public static final java.lang.String ALGO_ID_MAC_HMAC_SHA256
HMAC - Optional HMAC-SHA256

See Also:
Constant Field Values

ALGO_ID_MAC_HMAC_SHA384

public static final java.lang.String ALGO_ID_MAC_HMAC_SHA384
HMAC - Optional HMAC-SHA284

See Also:
Constant Field Values

ALGO_ID_MAC_HMAC_SHA512

public static final java.lang.String ALGO_ID_MAC_HMAC_SHA512
HMAC - Optional HMAC-SHA512

See Also:
Constant Field Values

ALGO_ID_SIGNATURE_ECDSA_SHA1

public static final java.lang.String ALGO_ID_SIGNATURE_ECDSA_SHA1
Signature - Optional ECDSAwithSHA1

See Also:
Constant Field Values
Constructor Detail

XMLSignature

public XMLSignature(org.w3c.dom.Document doc,
                    java.lang.String BaseURI,
                    java.lang.String SignatureMethodURI)
             throws XMLSecurityException
This creates a new ds:Signature Element and adds an empty ds:SignedInfo. The ds:SignedInfo is initialized with the specified Signature algorithm and Canonicalizer.ALGO_ID_C14N_OMIT_COMMENTS which is REQUIRED by the spec. This method's main use is for creating a new signature.

Parameters:
doc - Document in which the signature will be appended after creation.
BaseURI - URI to be used as context for all relative URIs.
SignatureMethodURI - signature algorithm to use.
Throws:
XMLSecurityException

XMLSignature

public XMLSignature(org.w3c.dom.Document doc,
                    java.lang.String BaseURI,
                    java.lang.String SignatureMethodURI,
                    int HMACOutputLength)
             throws XMLSecurityException
Constructor XMLSignature

Parameters:
doc -
BaseURI -
SignatureMethodURI - the Signature method to be used.
HMACOutputLength -
Throws:
XMLSecurityException

XMLSignature

public XMLSignature(org.w3c.dom.Document doc,
                    java.lang.String BaseURI,
                    java.lang.String SignatureMethodURI,
                    java.lang.String CanonicalizationMethodURI)
             throws XMLSecurityException
Constructor XMLSignature

Parameters:
doc -
BaseURI -
SignatureMethodURI - the Signature method to be used.
CanonicalizationMethodURI - the canonicalization algorithm to be used to c14nize the SignedInfo element.
Throws:
XMLSecurityException

XMLSignature

public XMLSignature(org.w3c.dom.Document doc,
                    java.lang.String BaseURI,
                    java.lang.String SignatureMethodURI,
                    int HMACOutputLength,
                    java.lang.String CanonicalizationMethodURI)
             throws XMLSecurityException
Constructor XMLSignature

Parameters:
doc -
BaseURI -
SignatureMethodURI -
HMACOutputLength -
CanonicalizationMethodURI -
Throws:
XMLSecurityException

XMLSignature

public XMLSignature(org.w3c.dom.Document doc,
                    java.lang.String BaseURI,
                    org.w3c.dom.Element SignatureMethodElem,
                    org.w3c.dom.Element CanonicalizationMethodElem)
             throws XMLSecurityException
Creates a XMLSignature in a Document

Parameters:
doc -
BaseURI -
SignatureMethodElem -
CanonicalizationMethodElem -
Throws:
XMLSecurityException

XMLSignature

public XMLSignature(org.w3c.dom.Element element,
                    java.lang.String BaseURI)
             throws XMLSignatureException,
                    XMLSecurityException
This will parse the element and construct the Java Objects. That will allow a user to validate the signature.

Parameters:
element - ds:Signature element that contains the whole signature
BaseURI - URI to be prepended to all relative URIs
Throws:
XMLSecurityException
XMLSignatureException - if the signature is badly formatted
Method Detail

setId

public void setId(java.lang.String id)
Sets the Id attribute

Parameters:
id - Id value for the id attribute on the Signature Element

getId

public java.lang.String getId()
Returns the Id attribute

Returns:
the Id attribute

getSignedInfo

public SignedInfo getSignedInfo()
Returns the completely parsed SignedInfo object.

Returns:
the completely parsed SignedInfo object.

getSignatureValue

public byte[] getSignatureValue()
                         throws XMLSignatureException
Returns the octet value of the SignatureValue element. Throws an XMLSignatureException if it has no or wrong content.

Returns:
the value of the SignatureValue element.
Throws:
XMLSignatureException - If there is no content

getKeyInfo

public KeyInfo getKeyInfo()
Returns the KeyInfo child. If we are in signing mode and the KeyInfo does not exist yet, it is created on demand and added to the Signature.
This allows to add arbitrary content to the KeyInfo during signing.

Returns:
the KeyInfo object

appendObject

public void appendObject(ObjectContainer object)
                  throws XMLSignatureException
Appends an Object (not a java.lang.Object but an Object element) to the Signature. Please note that this is only possible when signing.

Parameters:
object - ds:Object to be appended.
Throws:
XMLSignatureException - When this object is used to verify.

getObjectItem

public ObjectContainer getObjectItem(int i)
Returns the ith ds:Object child of the signature or null if no such ds:Object element exists.

Parameters:
i -
Returns:
the ith ds:Object child of the signature or null if no such ds:Object element exists.

getObjectLength

public int getObjectLength()
Returns the number of all ds:Object elements.

Returns:
the number of all ds:Object elements.

sign

public void sign(java.security.Key signingKey)
          throws XMLSignatureException
Digests all References in the SignedInfo, calculates the signature value and sets it in the SignatureValue Element.

Parameters:
signingKey - the PrivateKey or SecretKey that is used to sign.
Throws:
XMLSignatureException

addResourceResolver

public void addResourceResolver(ResourceResolver resolver)
Adds a ResourceResolver to enable the retrieval of resources.

Parameters:
resolver -

addResourceResolver

public void addResourceResolver(ResourceResolverSpi resolver)
Adds a ResourceResolverSpi to enable the retrieval of resources.

Parameters:
resolver -

checkSignatureValue

public boolean checkSignatureValue(java.security.cert.X509Certificate cert)
                            throws XMLSignatureException
Extracts the public key from the certificate and verifies if the signature is valid by re-digesting all References, comparing those against the stored DigestValues and then checking to see if the Signatures match on the SignedInfo.

Parameters:
cert - Certificate that contains the public key part of the keypair that was used to sign.
Returns:
true if the signature is valid, false otherwise
Throws:
XMLSignatureException

checkSignatureValue

public boolean checkSignatureValue(java.security.Key pk)
                            throws XMLSignatureException
Verifies if the signature is valid by redigesting all References, comparing those against the stored DigestValues and then checking to see if the Signatures match on the SignedInfo.

Parameters:
pk - PublicKey part of the keypair or SecretKey that was used to sign
Returns:
true if the signature is valid, false otherwise
Throws:
XMLSignatureException

addDocument

public void addDocument(java.lang.String referenceURI,
                        Transforms trans,
                        java.lang.String digestURI,
                        java.lang.String ReferenceId,
                        java.lang.String ReferenceType)
                 throws XMLSignatureException
Add a Reference with full parameters to this Signature

Parameters:
referenceURI - URI of the resource to be signed. Can be null in which case the dereferencing is application specific. Can be "" in which it's the parent node (or parent document?). There can only be one "" in each signature.
trans - Optional list of transformations to be done before digesting
digestURI - Mandatory URI of the digesting algorithm to use.
ReferenceId - Optional id attribute for this Reference
ReferenceType - Optional mimetype for the URI
Throws:
XMLSignatureException

addDocument

public void addDocument(java.lang.String referenceURI,
                        Transforms trans,
                        java.lang.String digestURI)
                 throws XMLSignatureException
This method is a proxy method for the Manifest.addDocument(java.lang.String, java.lang.String, org.apache.xml.security.transforms.Transforms, java.lang.String, java.lang.String, java.lang.String) method.

Parameters:
referenceURI - URI according to the XML Signature specification.
trans - List of transformations to be applied.
digestURI - URI of the digest algorithm to be used.
Throws:
XMLSignatureException
See Also:
Manifest.addDocument(java.lang.String, java.lang.String, org.apache.xml.security.transforms.Transforms, java.lang.String, java.lang.String, java.lang.String)

addDocument

public void addDocument(java.lang.String referenceURI,
                        Transforms trans)
                 throws XMLSignatureException
Adds a Reference with just the URI and the transforms. This used the SHA1 algorithm as a default digest algorithm.

Parameters:
referenceURI - URI according to the XML Signature specification.
trans - List of transformations to be applied.
Throws:
XMLSignatureException

addDocument

public void addDocument(java.lang.String referenceURI)
                 throws XMLSignatureException
Add a Reference with just this URI. It uses SHA1 by default as the digest algorithm

Parameters:
referenceURI - URI according to the XML Signature specification.
Throws:
XMLSignatureException

addKeyInfo

public void addKeyInfo(java.security.cert.X509Certificate cert)
                throws XMLSecurityException
Add an X509 Certificate to the KeyInfo. This will include the whole cert inside X509Data/X509Certificate tags.

Parameters:
cert - Certificate to be included. This should be the certificate of the key that was used to sign.
Throws:
XMLSecurityException

addKeyInfo

public void addKeyInfo(java.security.PublicKey pk)
Add this public key to the KeyInfo. This will include the complete key in the KeyInfo structure.

Parameters:
pk -

createSecretKey

public javax.crypto.SecretKey createSecretKey(byte[] secretKeyBytes)
Proxy method for SignedInfo.createSecretKey(byte[]). If you want to create a MAC, this method helps you to obtain the SecretKey from octets.

Parameters:
secretKeyBytes -
Returns:
the secret key created.
See Also:
SignedInfo.createSecretKey(byte[])

setFollowNestedManifests

public void setFollowNestedManifests(boolean followManifests)
Signal wether Manifest should be automatically validated. Checking the digests in References in a Signature are mandatory, but for References inside a Manifest it is application specific. This boolean is to indicate that the References inside Manifests should be validated.

Parameters:
followManifests -
See Also:
Core validation section in the XML Signature Rec.

getBaseLocalName

public java.lang.String getBaseLocalName()
Get the local name of this element

Specified by:
getBaseLocalName in class ElementProxy
Returns:
Constants._TAG_SIGNATURE
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