Signature CreateSignature(XmlDocument doc, XmlElement body,
XmlNamespaceManager nsmgr,
SupportingTokenInfoCollection tokenInfos,
SecurityKeyIdentifierClause actualClause,
SymmetricAlgorithm actualKey,
SecurityToken signToken,
bool includeSigToken,
bool signatureProtection,
WSSecurityMessageHeader header,
Collection <WSSignedXml> endorsedSignatures,
ref string bodyId)
{
// sign
// see clause 8 of WS-SecurityPolicy C.2.2
WSSignedXml sxml = new WSSignedXml(doc);
SecurityTokenReferenceKeyInfo sigKeyInfo;
XmlElement secElem = null;
var sigSpec = SignaturePart;
var serializer = security.TokenSerializer;
var suite = security.Element.DefaultAlgorithmSuite;
var sig = sxml.Signature;
sig.SignedInfo.CanonicalizationMethod =
suite.DefaultCanonicalizationAlgorithm;
foreach (XmlElement elem in doc.SelectNodes("/s:Envelope/s:Header/o:Security/u:Timestamp", nsmgr))
{
CreateReference(sig, elem, elem.GetAttribute("Id", Constants.WsuNamespace));
}
foreach (XmlElement elem in doc.SelectNodes("/s:Envelope/s:Header/o:Security/o11:SignatureConfirmation", nsmgr))
{
CreateReference(sig, elem, elem.GetAttribute("Id", Constants.WsuNamespace));
}
foreach (SupportingTokenInfo tinfo in tokenInfos)
{
if (tinfo.Mode != SecurityTokenAttachmentMode.Endorsing)
{
XmlElement el = sxml.GetIdElement(doc, tinfo.Token.Id);
CreateReference(sig, el, el.GetAttribute("Id", Constants.WsuNamespace));
}
}
XmlNodeList nodes = doc.SelectNodes("/s:Envelope/s:Header/*", nsmgr);
for (int i = 0; i < msg.Headers.Count; i++)
{
MessageHeaderInfo h = msg.Headers [i];
if (h.Name == "Security" && h.Namespace == Constants.WssNamespace)
{
secElem = nodes [i] as XmlElement;
}
else if ((sigSpec.HeaderTypes.Count == 0 ||
sigSpec.HeaderTypes.Contains(new XmlQualifiedName(h.Name, h.Namespace))) &&
(msg.Version.Addressing != AddressingVersion.None ||
!String.Equals(h.Name, "Action", StringComparison.Ordinal)))
{
string id = GenerateId(doc);
h.Id = id;
CreateReference(sig, nodes [i] as XmlElement, id);
}
}
if (sigSpec.IsBodyIncluded)
{
bodyId = GenerateId(doc);
CreateReference(sig, body.ParentNode as XmlElement, bodyId);
}
if (security.DefaultSignatureAlgorithm == SignedXml.XmlDsigHMACSHA1Url)
{
// FIXME: use appropriate hash algorithm
sxml.ComputeSignature(new HMACSHA1(actualKey.Key));
sigKeyInfo = new SecurityTokenReferenceKeyInfo(actualClause, serializer, doc);
}
else
{
SecurityKeyIdentifierClause signClause =
CounterParameters.CallCreateKeyIdentifierClause(signToken, includeSigToken ? CounterParameters.ReferenceStyle : SecurityTokenReferenceStyle.External);
AsymmetricSecurityKey signKey = (AsymmetricSecurityKey)signToken.ResolveKeyIdentifierClause(signClause);
sxml.SigningKey = signKey.GetAsymmetricAlgorithm(security.DefaultSignatureAlgorithm, true);
sxml.ComputeSignature();
sigKeyInfo = new SecurityTokenReferenceKeyInfo(signClause, serializer, doc);
}
sxml.KeyInfo = new KeyInfo();
sxml.KeyInfo.AddClause(sigKeyInfo);
if (!signatureProtection)
{
header.AddContent(sig);
}
// endorse the signature with (signed)endorsing
// supporting tokens.
foreach (SupportingTokenInfo tinfo in tokenInfos)
{
switch (tinfo.Mode)
{
case SecurityTokenAttachmentMode.Endorsing:
case SecurityTokenAttachmentMode.SignedEndorsing:
if (sxml.Signature.Id == null)
{
sig.Id = GenerateId(doc);
secElem.AppendChild(sxml.GetXml());
}
WSSignedXml ssxml = new WSSignedXml(doc);
ssxml.Signature.SignedInfo.CanonicalizationMethod = suite.DefaultCanonicalizationAlgorithm;
CreateReference(ssxml.Signature, doc, sig.Id);
SecurityToken sst = tinfo.Token;
SecurityKey ssk = sst.SecurityKeys [0]; // FIXME: could be different?
SecurityKeyIdentifierClause tclause = new LocalIdKeyIdentifierClause(sst.Id); // FIXME: could be different?
if (ssk is SymmetricSecurityKey)
{
SymmetricSecurityKey signKey = (SymmetricSecurityKey)ssk;
ssxml.ComputeSignature(signKey.GetKeyedHashAlgorithm(suite.DefaultSymmetricSignatureAlgorithm));
}
else
{
AsymmetricSecurityKey signKey = (AsymmetricSecurityKey)ssk;
ssxml.SigningKey = signKey.GetAsymmetricAlgorithm(suite.DefaultAsymmetricSignatureAlgorithm, true);
ssxml.ComputeSignature();
}
ssxml.KeyInfo.AddClause(new SecurityTokenReferenceKeyInfo(tclause, serializer, doc));
if (!signatureProtection)
{
header.AddContent(ssxml.Signature);
}
endorsedSignatures.Add(ssxml);
break;
}
}
return(sig);
}
public Message SecureMessage()
{
secprop = Message.Properties.Security ?? new SecurityMessageProperty();
SecurityToken encToken =
secprop.InitiatorToken != null ? secprop.InitiatorToken.SecurityToken : security.EncryptionToken;
// FIXME: it might be still incorrect.
SecurityToken signToken =
Parameters == CounterParameters ? null :
security.SigningToken;
MessageProtectionOrder protectionOrder =
security.MessageProtectionOrder;
SecurityTokenSerializer serializer =
security.TokenSerializer;
SecurityBindingElement element =
security.Element;
SecurityAlgorithmSuite suite = element.DefaultAlgorithmSuite;
string messageId = "uuid-" + Guid.NewGuid();
int identForMessageId = 1;
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
// FIXME: get correct ReplyTo value
if (Direction == MessageDirection.Input)
{
msg.Headers.ReplyTo = new EndpointAddress(Constants.WsaAnonymousUri);
}
if (MessageTo != null)
{
msg.Headers.To = MessageTo.Uri;
}
// wss:Security
WSSecurityMessageHeader header =
new WSSecurityMessageHeader(serializer);
msg.Headers.Add(header);
// 1. [Timestamp]
if (element.IncludeTimestamp)
{
WsuTimestamp timestamp = new WsuTimestamp();
timestamp.Id = messageId + "-" + identForMessageId++;
timestamp.Created = DateTime.Now;
// FIXME: on service side, use element.LocalServiceSettings.TimestampValidityDuration
timestamp.Expires = timestamp.Created.Add(element.LocalClientSettings.TimestampValidityDuration);
header.AddContent(timestamp);
}
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("s", msg.Version.Envelope.Namespace);
nsmgr.AddNamespace("o", Constants.WssNamespace);
nsmgr.AddNamespace("u", Constants.WsuNamespace);
nsmgr.AddNamespace("o11", Constants.Wss11Namespace);
/*WrappedKey*/ SecurityToken primaryToken = null;
DerivedKeySecurityToken dkeyToken = null;
SecurityToken actualToken = null;
SecurityKeyIdentifierClause actualClause = null;
Signature sig = null;
List <DerivedKeySecurityToken> derivedKeys =
new List <DerivedKeySecurityToken> ();
SymmetricAlgorithm masterKey = new RijndaelManaged();
masterKey.KeySize = suite.DefaultSymmetricKeyLength;
masterKey.Mode = CipherMode.CBC;
masterKey.Padding = PaddingMode.ISO10126;
SymmetricAlgorithm actualKey = masterKey;
// 2. [Encryption Token]
// SecurityTokenInclusionMode
// - Initiator or Recipient
// - done or notyet. FIXME: not implemented yet
// It also affects on key reference output
bool includeEncToken = // /* FIXME: remove this hack */Parameters is SslSecurityTokenParameters ? false :
ShouldIncludeToken(
Security.RecipientParameters.InclusionMode, false);
bool includeSigToken = // /* FIXME: remove this hack */ Parameters is SslSecurityTokenParameters ? false :
ShouldIncludeToken(
Security.InitiatorParameters.InclusionMode, false);
SecurityKeyIdentifierClause encClause = ShouldOutputEncryptedKey ?
CounterParameters.CallCreateKeyIdentifierClause(encToken, !ShouldOutputEncryptedKey ? SecurityTokenReferenceStyle.Internal : includeEncToken ? Parameters.ReferenceStyle : SecurityTokenReferenceStyle.External) : null;
MessagePartSpecification sigSpec = SignaturePart;
MessagePartSpecification encSpec = EncryptionPart;
// encryption key (possibly also used for signing)
// FIXME: get correct SymmetricAlgorithm according to the algorithm suite
if (secprop.EncryptionKey != null)
{
actualKey.Key = secprop.EncryptionKey;
}
// FIXME: remove thid hack
if (!ShouldOutputEncryptedKey)
{
primaryToken = secprop.ProtectionToken.SecurityToken as WrappedKeySecurityToken;
}
else
{
primaryToken =
// FIXME: remove this hack?
encToken is SecurityContextSecurityToken ? encToken :
new WrappedKeySecurityToken(messageId + "-" + identForMessageId++,
actualKey.Key,
// security.DefaultKeyWrapAlgorithm,
Parameters.InternalHasAsymmetricKey ?
suite.DefaultAsymmetricKeyWrapAlgorithm :
suite.DefaultSymmetricKeyWrapAlgorithm,
encToken,
encClause != null ? new SecurityKeyIdentifier(encClause) : null);
}
// If it reuses request's encryption key, do not output.
if (ShouldOutputEncryptedKey)
{
header.AddContent(primaryToken);
}
actualToken = primaryToken;
// FIXME: I doubt it is correct...
WrappedKeySecurityToken requestEncKey = ShouldOutputEncryptedKey ? null : primaryToken as WrappedKeySecurityToken;
actualClause = requestEncKey == null ? (SecurityKeyIdentifierClause)
new LocalIdKeyIdentifierClause(actualToken.Id, typeof(WrappedKeySecurityToken)) :
new InternalEncryptedKeyIdentifierClause(SHA1.Create().ComputeHash(requestEncKey.GetWrappedKey()));
// generate derived key if needed
if (CounterParameters.RequireDerivedKeys)
{
RijndaelManaged deriv = new RijndaelManaged();
deriv.KeySize = suite.DefaultEncryptionKeyDerivationLength;
deriv.Mode = CipherMode.CBC;
deriv.Padding = PaddingMode.ISO10126;
deriv.GenerateKey();
dkeyToken = new DerivedKeySecurityToken(
GenerateId(doc),
null, // algorithm
actualClause,
new InMemorySymmetricSecurityKey(actualKey.Key),
null, // name
null, // generation
null, // offset
deriv.Key.Length,
null, // label
deriv.Key);
derivedKeys.Add(dkeyToken);
actualToken = dkeyToken;
actualKey.Key = ((SymmetricSecurityKey)dkeyToken.SecurityKeys [0]).GetSymmetricKey();
actualClause = new LocalIdKeyIdentifierClause(dkeyToken.Id);
header.AddContent(dkeyToken);
}
ReferenceList refList = new ReferenceList();
// When encrypted with DerivedKeyToken, put references
// immediately after the derived token (not inside the
// primary token).
// Similarly, when we do not output EncryptedKey,
// output ReferenceList in the same way.
if (CounterParameters.RequireDerivedKeys ||
!ShouldOutputEncryptedKey)
{
header.AddContent(refList);
}
else
{
((WrappedKeySecurityToken)primaryToken).ReferenceList = refList;
}
// [Signature Confirmation]
if (security.RequireSignatureConfirmation && secprop.ConfirmedSignatures.Count > 0)
{
foreach (string value in secprop.ConfirmedSignatures)
{
header.AddContent(new Wss11SignatureConfirmation(GenerateId(doc), value));
}
}
SupportingTokenInfoCollection tokenInfos =
Direction == MessageDirection.Input ?
security.CollectSupportingTokens(GetAction()) :
new SupportingTokenInfoCollection(); // empty
foreach (SupportingTokenInfo tinfo in tokenInfos)
{
header.AddContent(tinfo.Token);
}
// populate DOM to sign.
XPathNavigator nav = doc.CreateNavigator();
using (XmlWriter w = nav.AppendChild()) {
msg.WriteMessage(w);
}
XmlElement body = doc.SelectSingleNode("/s:Envelope/s:Body/*", nsmgr) as XmlElement;
string bodyId = null;
XmlElement secElem = null;
Collection <WSSignedXml> endorsedSignatures =
new Collection <WSSignedXml> ();
bool signatureProtection = (protectionOrder == MessageProtectionOrder.SignBeforeEncryptAndEncryptSignature);
// Below are o:Security contents that are not signed...
if (includeSigToken && signToken != null)
{
header.AddContent(signToken);
}
switch (protectionOrder)
{
case MessageProtectionOrder.EncryptBeforeSign:
// FIXME: implement
throw new NotImplementedException();
case MessageProtectionOrder.SignBeforeEncrypt:
case MessageProtectionOrder.SignBeforeEncryptAndEncryptSignature:
// sign
// see clause 8 of WS-SecurityPolicy C.2.2
WSSignedXml sxml = new WSSignedXml(doc);
SecurityTokenReferenceKeyInfo sigKeyInfo;
sig = sxml.Signature;
sig.SignedInfo.CanonicalizationMethod =
suite.DefaultCanonicalizationAlgorithm;
foreach (XmlElement elem in doc.SelectNodes("/s:Envelope/s:Header/o:Security/u:Timestamp", nsmgr))
{
CreateReference(sig, elem, elem.GetAttribute("Id", Constants.WsuNamespace));
}
foreach (XmlElement elem in doc.SelectNodes("/s:Envelope/s:Header/o:Security/o11:SignatureConfirmation", nsmgr))
{
CreateReference(sig, elem, elem.GetAttribute("Id", Constants.WsuNamespace));
}
foreach (SupportingTokenInfo tinfo in tokenInfos)
{
if (tinfo.Mode != SecurityTokenAttachmentMode.Endorsing)
{
XmlElement el = sxml.GetIdElement(doc, tinfo.Token.Id);
CreateReference(sig, el, el.GetAttribute("Id", Constants.WsuNamespace));
}
}
XmlNodeList nodes = doc.SelectNodes("/s:Envelope/s:Header/*", nsmgr);
for (int i = 0; i < msg.Headers.Count; i++)
{
MessageHeaderInfo h = msg.Headers [i];
if (h.Name == "Security" && h.Namespace == Constants.WssNamespace)
{
secElem = nodes [i] as XmlElement;
}
else if (sigSpec.HeaderTypes.Count == 0 ||
sigSpec.HeaderTypes.Contains(new XmlQualifiedName(h.Name, h.Namespace)))
{
string id = GenerateId(doc);
h.Id = id;
CreateReference(sig, nodes [i] as XmlElement, id);
}
}
if (sigSpec.IsBodyIncluded)
{
bodyId = GenerateId(doc);
CreateReference(sig, body.ParentNode as XmlElement, bodyId);
}
if (security.DefaultSignatureAlgorithm == SignedXml.XmlDsigHMACSHA1Url)
{
// FIXME: use appropriate hash algorithm
sxml.ComputeSignature(new HMACSHA1(actualKey.Key));
sigKeyInfo = new SecurityTokenReferenceKeyInfo(actualClause, serializer, doc);
}
else
{
SecurityKeyIdentifierClause signClause =
CounterParameters.CallCreateKeyIdentifierClause(signToken, includeSigToken ? CounterParameters.ReferenceStyle : SecurityTokenReferenceStyle.External);
AsymmetricSecurityKey signKey = (AsymmetricSecurityKey)signToken.ResolveKeyIdentifierClause(signClause);
sxml.SigningKey = signKey.GetAsymmetricAlgorithm(security.DefaultSignatureAlgorithm, true);
sxml.ComputeSignature();
sigKeyInfo = new SecurityTokenReferenceKeyInfo(signClause, serializer, doc);
}
sxml.KeyInfo = new KeyInfo();
sxml.KeyInfo.AddClause(sigKeyInfo);
if (!signatureProtection)
{
header.AddContent(sig);
}
// endorse the signature with (signed)endorsing
// supporting tokens.
foreach (SupportingTokenInfo tinfo in tokenInfos)
{
switch (tinfo.Mode)
{
case SecurityTokenAttachmentMode.Endorsing:
case SecurityTokenAttachmentMode.SignedEndorsing:
if (sxml.Signature.Id == null)
{
sig.Id = GenerateId(doc);
secElem.AppendChild(sxml.GetXml());
}
WSSignedXml ssxml = new WSSignedXml(doc);
ssxml.Signature.SignedInfo.CanonicalizationMethod = suite.DefaultCanonicalizationAlgorithm;
CreateReference(ssxml.Signature, doc, sig.Id);
SecurityToken sst = tinfo.Token;
SecurityKey ssk = sst.SecurityKeys [0]; // FIXME: could be different?
SecurityKeyIdentifierClause tclause = new LocalIdKeyIdentifierClause(sst.Id); // FIXME: could be different?
if (ssk is SymmetricSecurityKey)
{
SymmetricSecurityKey signKey = (SymmetricSecurityKey)ssk;
ssxml.ComputeSignature(signKey.GetKeyedHashAlgorithm(suite.DefaultSymmetricSignatureAlgorithm));
}
else
{
AsymmetricSecurityKey signKey = (AsymmetricSecurityKey)ssk;
ssxml.SigningKey = signKey.GetAsymmetricAlgorithm(suite.DefaultAsymmetricSignatureAlgorithm, true);
ssxml.ComputeSignature();
}
ssxml.KeyInfo.AddClause(new SecurityTokenReferenceKeyInfo(tclause, serializer, doc));
if (!signatureProtection)
{
header.AddContent(ssxml.Signature);
}
endorsedSignatures.Add(ssxml);
break;
}
}
// encrypt
WSEncryptedXml exml = new WSEncryptedXml(doc);
EncryptedData edata = Encrypt(body, actualKey, actualToken.Id, refList, actualClause, exml, doc);
EncryptedXml.ReplaceElement(body, edata, false);
// encrypt signature
if (signatureProtection)
{
XmlElement sigxml = sig.GetXml();
edata = Encrypt(sigxml, actualKey, actualToken.Id, refList, actualClause, exml, doc);
header.AddContent(edata);
foreach (WSSignedXml ssxml in endorsedSignatures)
{
sigxml = ssxml.GetXml();
edata = Encrypt(sigxml, actualKey, actualToken.Id, refList, actualClause, exml, doc);
header.AddContent(edata);
}
if (security.RequireSignatureConfirmation)
{
Collection <Wss11SignatureConfirmation> confs = header.FindAll <Wss11SignatureConfirmation> ();
int count = 0;
foreach (XmlElement elem in doc.SelectNodes("/s:Envelope/s:Header/o:Security/o11:SignatureConfirmation", nsmgr))
{
edata = Encrypt(elem, actualKey, confs [count].Id, refList, actualClause, exml, doc);
EncryptedXml.ReplaceElement(elem, edata, false);
header.Contents.Insert(header.Contents.IndexOf(confs [count]), edata);
header.Contents.Remove(confs [count++]);
}
}
}
// encrypt Encrypted supporting tokens
foreach (SupportingTokenInfo tinfo in tokenInfos)
{
if (tinfo.Mode == SecurityTokenAttachmentMode.SignedEncrypted)
{
XmlElement el = exml.GetIdElement(doc, tinfo.Token.Id);
tinfo.Encrypted = Encrypt(el, actualKey, actualToken.Id, refList, actualClause, exml, doc);
EncryptedXml.ReplaceElement(el, tinfo.Encrypted, false);
header.Contents.Insert(header.Contents.IndexOf(tinfo.Token), tinfo.Encrypted);
header.Contents.Remove(tinfo.Token);
}
}
break;
}
Message ret = new WSSecurityMessage(Message.CreateMessage(msg.Version, msg.Headers.Action, new XmlNodeReader(doc.SelectSingleNode("/s:Envelope/s:Body/*", nsmgr) as XmlElement)), bodyId);
ret.Properties.Security = (SecurityMessageProperty)secprop.CreateCopy();
ret.Properties.Security.EncryptionKey = masterKey.Key;
// FIXME: can we support TransportToken here?
if (element is AsymmetricSecurityBindingElement)
{
ret.Properties.Security.InitiatorToken = new SecurityTokenSpecification(encToken, null); // FIXME: second argument
ret.Properties.Security.InitiatorToken = new SecurityTokenSpecification(signToken, null); // FIXME: second argument
}
else
{
ret.Properties.Security.ProtectionToken = new SecurityTokenSpecification(primaryToken, null);
}
ret.Headers.Clear();
ret.Headers.CopyHeadersFrom(msg);
// Header contents are:
// - Timestamp
// - SignatureConfirmation if required
// - EncryptionToken if included
// - derived key token for EncryptionToken
// - ReferenceList for encrypted items
// - signed supporting tokens
// - signed endorsing supporting tokens
// (i.e. Signed/SignedEncrypted/SignedEndorsing)
// - Signature Token if different from enc token.
// - derived key token for sig token if different
// - Signature for:
// - Timestamp
// - supporting tokens (regardless of
// its inclusion)
// - message parts in SignedParts
// - SignatureToken if TokenProtection
// (regardless of its inclusion)
// - Signatures for the main signature (above),
// for every endorsing token and signed
// endorsing token.
//
//MessageBuffer zzz = ret.CreateBufferedCopy (100000);
//ret = zzz.CreateMessage ();
//Console.WriteLine (zzz.CreateMessage ());
return(ret);
}