public void GetXmlWithSetProperty () { XmlDocument doc = new XmlDocument (); doc.LoadXml (xmlForGetXml); SignedInfo sig = new SignedInfo (); sig.LoadXml ((XmlElement) doc.SelectSingleNode ("//*[local-name()='SignedInfo']")); sig.CanonicalizationMethod = "urn:foo"; XmlElement el = sig.GetXml (); Assert ("#GetXmlWithSetProperty.document", doc != el.OwnerDocument); }
public void EmptyReferenceWithSetProperty () { XmlDocument doc = new XmlDocument (); doc.LoadXml (xmlForGetXml); XmlNode n = doc.SelectSingleNode ("//*[local-name()='Reference']"); n.ParentNode.RemoveChild (n); SignedInfo sig = new SignedInfo (); sig.LoadXml ((XmlElement) doc.SelectSingleNode ("//*[local-name()='SignedInfo']")); sig.CanonicalizationMethod = "urn:foo"; XmlElement el = sig.GetXml (); }
public void GetXmlWithoutSetProperty () { string result = @"<dsig:SignedInfo xmlns:dsig=""http://www.w3.org/2000/09/xmldsig#""><dsig:CanonicalizationMethod Algorithm=""http://www.w3.org/TR/2001/REC-xml-c14n-withcomments-20010315"" /><dsig:SignatureMethod Algorithm=""http://www.w3.org/2000/09/xmldsig#rsa-sha1"" /><dsig:Reference URI=""""><dsig:Transforms><dsig:Transform Algorithm=""http://www.w3.org/2000/09/xmldsig#enveloped-signature"" /></dsig:Transforms><dsig:DigestMethod Algorithm=""http://www.w3.org/2000/09/xmldsig#sha1"" /><dsig:DigestValue>nDF2V/bzRd0VE3EwShWtsBzTEDc=</dsig:DigestValue></dsig:Reference></dsig:SignedInfo>"; XmlDocument doc = new XmlDocument (); doc.LoadXml (xmlForGetXml); SignedInfo sig = new SignedInfo (); sig.LoadXml ((XmlElement) doc.SelectSingleNode ("//*[local-name()='SignedInfo']")); XmlElement el = sig.GetXml (); AssertEquals ("#GetXmlWOSetProperty.document", doc, el.OwnerDocument); AssertEquals ("#GetXmlWOSetProperty.outerxml", result, el.OuterXml); }
/// <include file='doc\SignedXml.uex' path='docs/doc[@for="SignedXml.ComputeSignature1"]/*' /> public void ComputeSignature(KeyedHashAlgorithm macAlg) { // Do some sanity checks if (macAlg == null) { throw new ArgumentNullException("macAlg"); } if (!(macAlg is HMACSHA1)) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignatureMethodKeyMismatch")); } int iSignatureLength; if (m_signature.SignedInfo.SignatureLength == null) { iSignatureLength = macAlg.HashSize; } else { iSignatureLength = Convert.ToInt32(m_signature.SignedInfo.SignatureLength); } // iSignatureLength should be less than hash size if (iSignatureLength < 0 || iSignatureLength > macAlg.HashSize) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidSignatureLength")); } if (iSignatureLength % 8 != 0) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidSignatureLength2")); } BuildDigestedReferences(); SignedInfo.SignatureMethod = XmlDsigHMACSHA1Url; // Compute the hash of the SignedInfo object XmlElement signedInfo = SignedInfo.GetXml().Clone() as XmlElement; // Add non default namespaces in scope if (m_namespaces != null) { foreach (XmlNode attrib in m_namespaces) { string name = ((attrib.Prefix != String.Empty) ? attrib.Prefix + ":" + attrib.LocalName : attrib.LocalName); // Skip the attribute if one with the same qualified name already exists if (signedInfo.HasAttribute(name) || (name.Equals("xmlns") && signedInfo.NamespaceURI != String.Empty)) { continue; } XmlAttribute nsattrib = m_containingDocument.CreateAttribute(name); nsattrib.Value = ((XmlNode)attrib).Value; signedInfo.SetAttributeNode(nsattrib); } } #if _DEBUG if (debug) { Console.WriteLine("computed signedInfo: "); Console.WriteLine(signedInfo.OuterXml); } #endif TransformChain tc = new TransformChain(); Transform c14nMethodTransform = (Transform)CryptoConfig.CreateFromName(SignedInfo.CanonicalizationMethod); if (c14nMethodTransform == null) { throw new CryptographicException(String.Format(SecurityResources.GetResourceString("Cryptography_Xml_CreateTransformFailed"), SignedInfo.CanonicalizationMethod)); } tc.Add(c14nMethodTransform); string strBaseUri = (m_containingDocument == null ? null : m_containingDocument.BaseURI); XmlResolver resolver = (m_bResolverSet ? m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), strBaseUri)); Stream hashInput = tc.TransformToOctetStream(PreProcessElementInput(signedInfo, resolver, strBaseUri), resolver, strBaseUri); byte[] hashValue = macAlg.ComputeHash(hashInput); m_signature.SignatureValue = new byte[iSignatureLength / 8]; Buffer.BlockCopy(hashValue, 0, m_signature.SignatureValue, 0, iSignatureLength / 8); #if _DEBUG if (debug) { Console.WriteLine("computed hash value: " + Convert.ToBase64String(hashValue)); } #endif }
/// <include file='doc\SignedXml.uex' path='docs/doc[@for="SignedXml.ComputeSignature"]/*' /> public void ComputeSignature() { BuildDigestedReferences(); // Load the key AsymmetricAlgorithm key; if (SigningKey != null) { key = SigningKey; } else { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_LoadKeyFailed")); } if (key == null) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_LoadKeyFailed")); } // Check the signature algorithm associated with the key so that we can accordingly set // the signature method if (key is DSA) { SignedInfo.SignatureMethod = XmlDsigDSAUrl; } else if (key is RSA) { // Default to RSA-SHA1 if (SignedInfo.SignatureMethod == null) { SignedInfo.SignatureMethod = XmlDsigRSASHA1Url; } } else { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_CreatedKeyFailed")); } // Compute the hash of the SignedInfo object XmlElement signedInfo = SignedInfo.GetXml().Clone() as XmlElement; // Add non default namespaces in scope if (m_namespaces != null) { foreach (XmlNode attrib in m_namespaces) { string name = ((attrib.Prefix != String.Empty) ? attrib.Prefix + ":" + attrib.LocalName : attrib.LocalName); // Skip the attribute if one with the same qualified name already exists if (signedInfo.HasAttribute(name) || (name.Equals("xmlns") && signedInfo.NamespaceURI != String.Empty)) { continue; } XmlAttribute nsattrib = m_containingDocument.CreateAttribute(name); nsattrib.Value = ((XmlNode)attrib).Value; signedInfo.SetAttributeNode(nsattrib); } } #if _DEBUG if (debug) { Console.WriteLine("computed signedInfo: "); Console.WriteLine(signedInfo.OuterXml); } #endif TransformChain tc = new TransformChain(); Transform c14nMethodTransform = (Transform)CryptoConfig.CreateFromName(SignedInfo.CanonicalizationMethod); if (c14nMethodTransform == null) { throw new CryptographicException(String.Format(SecurityResources.GetResourceString("Cryptography_Xml_CreateTransformFailed"), SignedInfo.CanonicalizationMethod)); } tc.Add(c14nMethodTransform); string strBaseUri = (m_containingDocument == null ? null : m_containingDocument.BaseURI); XmlResolver resolver = (m_bResolverSet ? m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), strBaseUri)); Stream hashInput = tc.TransformToOctetStream(PreProcessElementInput(signedInfo, resolver, strBaseUri), resolver, strBaseUri); // See if there is a signature description class defined through the Config file SignatureDescription signatureDescription = (SignatureDescription)CryptoConfig.CreateFromName(SignedInfo.SignatureMethod); if (signatureDescription == null) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignatureDescriptionNotCreated")); } // calculate the hash HashAlgorithm hashAlg = signatureDescription.CreateDigest(); if (hashAlg == null) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_CreateHashAlgorithmFailed")); } byte[] hashValue = hashAlg.ComputeHash(hashInput); AsymmetricSignatureFormatter asymmetricSignatureFormatter = signatureDescription.CreateFormatter(key); m_signature.SignatureValue = asymmetricSignatureFormatter.CreateSignature(hashAlg); #if _DEBUG if (debug) { Console.WriteLine("computed hash value: " + Convert.ToBase64String(hashValue)); } #endif }
/// <include file='doc\SignedXml.uex' path='docs/doc[@for="SignedXml.CheckSignature2"]/*' /> public bool CheckSignature(KeyedHashAlgorithm macAlg) { // Do some sanity checks if (macAlg == null) { throw new ArgumentNullException("macAlg"); } int iSignatureLength; if (m_signature.SignedInfo.SignatureLength == null) { iSignatureLength = macAlg.HashSize; } else { iSignatureLength = Convert.ToInt32(m_signature.SignedInfo.SignatureLength); } // iSignatureLength should be less than hash size if (iSignatureLength < 0 || iSignatureLength > macAlg.HashSize) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidSignatureLength")); } if (iSignatureLength % 8 != 0) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidSignatureLength2")); } if (m_signature.SignatureValue == null) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignatureValueRequired")); } if (m_signature.SignatureValue.Length != iSignatureLength / 8) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidSignatureLength")); } // set up the canonicalizer & canonicalize SignedInfo TransformChain tc = new TransformChain(); Transform c14nMethodTransform = (Transform)CryptoConfig.CreateFromName(SignedInfo.CanonicalizationMethod); if (c14nMethodTransform == null) { throw new CryptographicException(String.Format(SecurityResources.GetResourceString("Cryptography_Xml_CreateTransformFailed"), SignedInfo.CanonicalizationMethod)); } tc.Add(c14nMethodTransform); XmlElement signedInfo = SignedInfo.GetXml().Clone() as XmlElement; // Add non default namespaces in scope if (m_namespaces != null) { foreach (XmlNode attrib in m_namespaces) { string name = ((attrib.Prefix != String.Empty) ? attrib.Prefix + ":" + attrib.LocalName : attrib.LocalName); // Skip the attribute if one with the same qualified name already exists if (signedInfo.HasAttribute(name) || (name.Equals("xmlns") && signedInfo.NamespaceURI != String.Empty)) { continue; } XmlAttribute nsattrib = m_containingDocument.CreateAttribute(name); nsattrib.Value = ((XmlNode)attrib).Value; signedInfo.SetAttributeNode(nsattrib); } } string strBaseUri = (m_containingDocument == null ? null : m_containingDocument.BaseURI); XmlResolver resolver = (m_bResolverSet ? m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), strBaseUri)); Stream canonicalizedSignedXml = tc.TransformToOctetStream(PreProcessElementInput(signedInfo, resolver, strBaseUri), resolver, strBaseUri); // Calculate the hash byte[] hashValue = macAlg.ComputeHash(canonicalizedSignedXml); #if _DEBUG if (debug) { Console.WriteLine("Computed canonicalized SignedInfo:"); Console.WriteLine(signedInfo.OuterXml); Console.WriteLine("Computed Hash:"); Console.WriteLine(Convert.ToBase64String(hashValue)); Console.WriteLine("m_signature.SignatureValue:"); Console.WriteLine(Convert.ToBase64String(m_signature.SignatureValue)); } #endif for (int i = 0; i < m_signature.SignatureValue.Length; i++) { if (m_signature.SignatureValue[i] != hashValue[i]) { return(false); } } return(CheckDigestedReferences()); }
/// <include file='doc\SignedXml.uex' path='docs/doc[@for="SignedXml.CheckSignature1"]/*' /> public bool CheckSignature(AsymmetricAlgorithm key) { if (key == null) { throw new ArgumentNullException("key"); } SignatureDescription signatureDescription = (SignatureDescription)CryptoConfig.CreateFromName(m_signature.SignedInfo.SignatureMethod); if (signatureDescription == null) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignatureDescriptionNotCreated")); } // Let's see if the key corresponds with the SignatureMethod Type ta = Type.GetType(signatureDescription.KeyAlgorithm); Type tb = key.GetType(); if ((ta != tb) && !ta.IsSubclassOf(tb) && !tb.IsSubclassOf(ta)) { // Signature method key mismatch return(false); } // set up the canonicalizer & canonicalize SignedInfo TransformChain tc = new TransformChain(); Transform c14nMethodTransform = (Transform)CryptoConfig.CreateFromName(SignedInfo.CanonicalizationMethod); if (c14nMethodTransform == null) { throw new CryptographicException(String.Format(SecurityResources.GetResourceString("Cryptography_Xml_CreateTransformFailed"), SignedInfo.CanonicalizationMethod)); } tc.Add(c14nMethodTransform); XmlElement signedInfo = SignedInfo.GetXml().Clone() as XmlElement; // Add non default namespaces in scope if (m_namespaces != null) { foreach (XmlNode attrib in m_namespaces) { string name = ((attrib.Prefix != String.Empty) ? attrib.Prefix + ":" + attrib.LocalName : attrib.LocalName); // Skip the attribute if one with the same qualified name already exists if (signedInfo.HasAttribute(name) || (name.Equals("xmlns") && signedInfo.NamespaceURI != String.Empty)) { continue; } XmlAttribute nsattrib = m_containingDocument.CreateAttribute(name); nsattrib.Value = ((XmlNode)attrib).Value; signedInfo.SetAttributeNode(nsattrib); } } string strBaseUri = (m_containingDocument == null ? null : m_containingDocument.BaseURI); XmlResolver resolver = (m_bResolverSet ? m_xmlResolver : new XmlSecureResolver(new XmlUrlResolver(), strBaseUri)); Stream canonicalizedSignedXml = tc.TransformToOctetStream(PreProcessElementInput(signedInfo, resolver, strBaseUri), resolver, strBaseUri); // calculate the hash HashAlgorithm hashAlgorithm = signatureDescription.CreateDigest(); if (hashAlgorithm == null) { throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_CreateHashAlgorithmFailed")); } byte[] hashval = hashAlgorithm.ComputeHash(canonicalizedSignedXml); // We can FINALLY generate the SignatureValue #if _DEBUG if (debug) { Console.WriteLine("Computed canonicalized SignedInfo:"); Console.WriteLine(signedInfo.OuterXml); Console.WriteLine("Computed Hash:"); Console.WriteLine(Convert.ToBase64String(hashval)); Console.WriteLine("m_signature.SignatureValue:"); Console.WriteLine(Convert.ToBase64String(m_signature.SignatureValue)); } #endif AsymmetricSignatureDeformatter asymmetricSignatureDeformatter = signatureDescription.CreateDeformatter(key); bool bRet = asymmetricSignatureDeformatter.VerifySignature(hashAlgorithm, m_signature.SignatureValue); if (bRet != true) { #if _DEBUG if (debug) { Console.WriteLine("Failed to verify the signature on SignedInfo."); } #endif return(false); } // Now is the time to go through all the references and see if their // DigestValue are good return(CheckDigestedReferences()); }