c# - WCF 客户端 - 为 WS-Security Timestamp 签名指定签名算法

Question

我有一个 WCF 客户端正在向非 WCF 服务发送消息，并且该服务在处理用于签署 WS-Security Timestamp 元素的 HMAC-SHA1 签名方法时遇到问题。理想情况下，我们希望使用 RSA-SHA1 签名方法，但我无法让 WCF 使用该签名方法。

我使用的绑定(bind)是自定义绑定(bind)，它允许我通过 HTTPS 发送 SAML 2.0 token :

<customBinding>
    <!-- This binding is a WS2007FederationHttpBinding without Secure Sessions that uses Text message encoding. -->
    <binding
        name="WS2007FederationHttpBinding_NoSecureSession_Text"
        closeTimeout="00:01:00"
        openTimeout="00:01:00"
        receiveTimeout="00:10:00"
        sendTimeout="00:01:00">
        <security
            authenticationMode="IssuedTokenOverTransport"
            requireSignatureConfirmation="true"
            securityHeaderLayout="Lax"
            messageSecurityVersion="WSSecurity11WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10"
            keyEntropyMode="CombinedEntropy"
            includeTimestamp="true">
            <issuedTokenParameters
                tokenType="urn:oasis:names:tc:SAML:2.0:assertion">
                <!-- This describes the STS. That is, the URL, the binding to use, and its Identity -->
                <issuer
                    address="http://hostname//STS.svc"
                    binding="ws2007HttpBinding"
                    bindingConfiguration="StsUserNameBindingConfiguration">
                    <identity>
                        <!-- This is the certificate used for signing on the STS. -->
                        <!-- Replace "sts-signing-certificate-thumbprint" with the actual thumbprint of the STS's signing certificate -->
                        <certificateReference
                            findValue="sts-signing-certificate-thumbprint"
                            storeLocation="LocalMachine"
                                storeName="My"
                                x509FindType="FindByThumbprint"/>
                    </identity>
                </issuer>
            </issuedTokenParameters>

            <!-- This basically says "Don't use Secure Conversation" -->
            <secureConversationBootstrap/>
        </security>

        <!-- Use Text Encoding -->
        <textMessageEncoding/>

        <!-- This says to use HTTPS when communicating with the remote service -->
        <httpsTransport
            requireClientCertificate="true"
            maxBufferPoolSize="134217728"
            maxReceivedMessageSize="134217728"
            maxBufferSize="134217728"/>
    </binding>
</customBinding>

传出请求中的签名如下所示:

<Signature
    xmlns="http://www.w3.org/2000/09/xmldsig#">
    <SignedInfo>
        <CanonicalizationMethod
            Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
        <SignatureMethod
            Algorithm="http://www.w3.org/2000/09/xmldsig#hmac-sha1"/>
        <Reference
            URI="#_0">
            <Transforms>
                <Transform
                    Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
            </Transforms>
            <DigestMethod
                Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
            <DigestValue>GZfW1RkyS4DHYFPHRnRuqNSo+qE=</DigestValue>
        </Reference>
    </SignedInfo>
    <SignatureValue>rMzQ/kEV7AXcO3wm9hfQXNoX5r4=</SignatureValue>
    <KeyInfo>
        <o:SecurityTokenReference
            b:TokenType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0"
            xmlns:b="http://docs.oasis-open.org/wss/oasis-wss-wssecurity-secext-1.1.xsd">
            <o:KeyIdentifier
                ValueType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLID">_9f79359e-63dc-4e38-888c-6567dac4b41b</o:KeyIdentifier>
        </o:SecurityTokenReference>
    </KeyInfo>
</Signature>

注意 <SignatureMethod>是http://www.w3.org/2000/09/xmldsig#hmac-sha1

一件有趣的事情是 HMAC-SHA1 算法是对称的(一个 key 用于加密和解密)，而 RSA-SHA1 是非对称的(需要一个 key 用于加密和一个用于解密)。我认为 WCF 使用 HMAC-SHA1 算法是因为它是对称的，并且正在交换的 SAML token 是共享 secret ( key )。使用 SAML token 作为对称算法的共享 key 是有意义的，但是是否有一个选项可用于强制 WCF 使用非对称算法(如 RSA-SHA1)？

我已经能够通过更改 binding/security/defaultAlgorithmSuite 属性对签名方法进行一些细微的修改，但是各种选项并没有让我能够在此处指定 RSA-SHA1:

defaultAlgorithm = 默认:

<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#hmac-sha1"/> <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>

默认算法 = Basic256:

<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#hmac-sha1"/> <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>

默认算法 = Basic256Rsa15:

<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#hmac-sha1"/> <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>

默认算法 = Basic256Sha256:

<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-sha256"/> <DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>

默认算法 = Basic256Sha256Rsa15:

<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-sha256"/> <DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>

有没有办法强制 WCF 在时间戳签名上使用 RSA-SHA1？

Answer 1

我认为这是一个互操作性问题。在下面的链接中也有类似的问题。

http://www.fokkog.com/2011/01/ws-security-interoperability-issue.html

您可以手动创建和签署 token 。检查这篇文章:

How to make WCF Client conform to specific WS-Security - sign UsernameToken and SecurityTokenReference