Merge pull request #1 from miracl/sign-multiple

Initial work to sign/verify multiple xml nodes concurrently

.travis.yml

@@ -18,7 +18,6 @@ addons:
     - libxmlsec1-dev
 
 go:
-  - 1.6
   - 1.7
   - tip
 

resources/certs/cert1

@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+

resources/certs/cert2

@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----
+MIID9zCCA2CgAwIBAgIJAK+ii7kzrdqsMA0GCSqGSIb3DQEBBQUAMIGuMQswCQYD
+VQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTE9MDsGA1UEChM0WE1MIFNlY3Vy
+aXR5IExpYnJhcnkgKGh0dHA6Ly93d3cuYWxla3NleS5jb20veG1sc2VjKTEQMA4G
+A1UECxMHUm9vdCBDQTEWMBQGA1UEAxMNQWxla3NleSBTYW5pbjEhMB8GCSqGSIb3
+DQEJARYSeG1sc2VjQGFsZWtzZXkuY29tMCAXDTE0MDUyMzE3NTA1OVoYDzIxMTQw
+NDI5MTc1MDU5WjCBrjELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWEx
+PTA7BgNVBAoTNFhNTCBTZWN1cml0eSBMaWJyYXJ5IChodHRwOi8vd3d3LmFsZWtz
+ZXkuY29tL3htbHNlYykxEDAOBgNVBAsTB1Jvb3QgQ0ExFjAUBgNVBAMTDUFsZWtz
+ZXkgU2FuaW4xITAfBgkqhkiG9w0BCQEWEnhtbHNlY0BhbGVrc2V5LmNvbTCBnzAN
+BgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAtY4MCNj/qrOzVuex1BD/PuCYTDDOLLVj
+tpKXQteQPqy0kgMwuQgRwdNnICIHQbnFKL40XoyACJVWKM7b0LkvWJNeyVzXPqEE
+9ZPmNxWGUjVcr7powT7v8V7S2QflUnr8ZvR4XWwkZJ9EYKNhenijgJ5yYDrXCWdv
+C+fnjBjv2LcCAwEAAaOCARcwggETMB0GA1UdDgQWBBQGtaSsp6p1ROoVnE/fBYNP
+ah7+CzCB4wYDVR0jBIHbMIHYgBQGtaSsp6p1ROoVnE/fBYNPah7+C6GBtKSBsTCB
+rjELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExPTA7BgNVBAoTNFhN
+TCBTZWN1cml0eSBMaWJyYXJ5IChodHRwOi8vd3d3LmFsZWtzZXkuY29tL3htbHNl
+YykxEDAOBgNVBAsTB1Jvb3QgQ0ExFjAUBgNVBAMTDUFsZWtzZXkgU2FuaW4xITAf
+BgkqhkiG9w0BCQEWEnhtbHNlY0BhbGVrc2V5LmNvbYIJAK+ii7kzrdqsMAwGA1Ud
+EwQFMAMBAf8wDQYJKoZIhvcNAQEFBQADgYEARpb86RP/ck55X+NunXeIX81i763b
+j7Z1VJwFbA/QfupzxnqJ2IP/lxC8YxJ3Bp2IJMI7rC9r0poa41ZxI5rGHip97Dpg
+sxPF9lkRUmKBBQjkICOq1w/4d2DRInBoqXttD+0WsqDfNDVK+7kSE07ytn3RzHCj
+j0gv0PdxmuCsR/E=
+-----END CERTIFICATE-----
+

resources/certs/cert3

@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+

xmldsig.go

@@ -5,12 +5,36 @@ import (
 	"unsafe"
 )
 
-// #include <xmlsec/xmlsec.h>
+/*
-// #include <xmlsec/xmltree.h>
+#include <xmlsec/xmlsec.h>
-// #include <xmlsec/xmlenc.h>
+#include <xmlsec/xmltree.h>
-// #include <xmlsec/xmldsig.h>
+#include <xmlsec/xmlenc.h>
-// #include <xmlsec/errors.h>
+#include <xmlsec/xmldsig.h>
-// #include <xmlsec/crypto.h>
+#include <xmlsec/errors.h>
+#include <xmlsec/crypto.h>
+#include <xmlsec/nodeset.h>
+#include <libxml/list.h>
+
+void
+xmlSecFindNodes(const xmlListPtr found, const xmlNodePtr parent, const xmlChar *name, const xmlChar *ns) {
+
+    xmlNodePtr cur;
+    xmlNodePtr ret;
+
+    xmlSecAssert2(name != NULL, NULL);
+
+    cur = parent;
+    while(cur != NULL) {
+        if(cur->children != NULL) {
+            xmlSecFindNodes(found, cur->children, name, ns);
+        }
+        if((cur->type == XML_ELEMENT_NODE) && xmlSecCheckNodeName(cur, name, ns)) {
+            xmlListPushFront(found, cur);
+        }
+        cur = cur->next;
+    }
+}
+*/
 import "C"
 
 // SignatureOptions represents additional, less commonly used, options for Sign and
@@ -42,6 +66,36 @@ func Sign(key []byte, doc []byte, opts SignatureOptions) ([]byte, error) {
 	startProcessingXML()
 	defer stopProcessingXML()
 
+	parsedDoc, err := newDoc(doc, opts.XMLID)
+	if err != nil {
+		return nil, err
+	}
+	defer closeDoc(parsedDoc)
+
+	// #nosec
+	found := C.xmlListCreate(nil, nil)
+	defer func() { C.xmlListDelete(found) }()
+
+	C.xmlSecFindNodes(
+		found,
+		C.xmlDocGetRootElement(parsedDoc),
+		(*C.xmlChar)(unsafe.Pointer(&C.xmlSecNodeSignature)),
+		(*C.xmlChar)(unsafe.Pointer(&C.xmlSecDSigNs)))
+
+	c := C.xmlListSize(found)
+	if c == 0 {
+		return nil, errors.New("cannot find start node")
+	}
+
+	for C.xmlListEmpty(found) == 0 {
+		link := C.xmlListFront(found)
+		if link == nil {
+			return nil, errors.New("Link is null")
+		}
+
+		node := (C.xmlNodePtr)(C.xmlLinkGetData(link))
+		if node != nil {
+
 			ctx := C.xmlSecDSigCtxCreate(nil)
 			if ctx == nil {
 				return nil, errors.New("failed to create signature context")
@@ -54,27 +108,17 @@ func Sign(key []byte, doc []byte, opts SignatureOptions) ([]byte, error) {
 				C.xmlSecSize(len(key)),
 				C.xmlSecKeyDataFormatPem,
 				nil, nil, nil)
+
 			if ctx.signKey == nil {
 				return nil, errors.New("failed to load pem key")
 			}
 
-	parsedDoc, err := newDoc(doc, opts.XMLID)
-	if err != nil {
-		return nil, err
-	}
-	defer closeDoc(parsedDoc)
-
-	// #nosec
-	node := C.xmlSecFindNode(C.xmlDocGetRootElement(parsedDoc),
-		(*C.xmlChar)(unsafe.Pointer(&C.xmlSecNodeSignature)),
-		(*C.xmlChar)(unsafe.Pointer(&C.xmlSecDSigNs)))
-	if node == nil {
-		return nil, errors.New("cannot find start node")
-	}
-
 			if rv := C.xmlSecDSigCtxSign(ctx, node); rv < 0 {
 				return nil, errors.New("failed to sign")
 			}
+		}
+		C.xmlListPopFront(found)
+	}
 
 	return dumpDoc(parsedDoc), nil
 
@@ -131,12 +175,6 @@ func Verify(publicKey []byte, doc []byte, opts SignatureOptions) error {
 		return mustPopError()
 	}
 
-	dsigCtx := C.xmlSecDSigCtxCreate(keysMngr)
-	if dsigCtx == nil {
-		return mustPopError()
-	}
-	defer C.xmlSecDSigCtxDestroy(dsigCtx)
-
 	parsedDoc, err := newDoc(doc, opts.XMLID)
 	if err != nil {
 		return err
@@ -144,19 +182,41 @@ func Verify(publicKey []byte, doc []byte, opts SignatureOptions) error {
 	defer closeDoc(parsedDoc)
 
 	// #nosec
-	node := C.xmlSecFindNode(C.xmlDocGetRootElement(parsedDoc),
+	found := C.xmlListCreate(nil, nil)
+	defer func() { C.xmlListDelete(found) }()
+
+	C.xmlSecFindNodes(
+		found,
+		C.xmlDocGetRootElement(parsedDoc),
 		(*C.xmlChar)(unsafe.Pointer(&C.xmlSecNodeSignature)),
 		(*C.xmlChar)(unsafe.Pointer(&C.xmlSecDSigNs)))
-	if node == nil {
+
+	c := C.xmlListSize(found)
+	if c == 0 {
 		return errors.New("cannot find start node")
 	}
 
-	if rv := C.xmlSecDSigCtxVerify(dsigCtx, node); rv < 0 {
+	for C.xmlListEmpty(found) == 0 {
+		link := C.xmlListFront(found)
+		if link == nil {
+			break
+		}
+		node := (C.xmlNodePtr)(C.xmlLinkGetData(link))
+		if node != nil {
+			ctx := C.xmlSecDSigCtxCreate(keysMngr)
+			if ctx == nil {
+				return mustPopError()
+			}
+			defer C.xmlSecDSigCtxDestroy(ctx)
+
+			if rv := C.xmlSecDSigCtxVerify(ctx, node); rv < 0 {
 				return ErrVerificationFailed
 			}
-
+			if ctx.status != xmlSecDSigStatusSucceeded {
-	if dsigCtx.status != xmlSecDSigStatusSucceeded {
 				return ErrVerificationFailed
 			}
+		}
+		C.xmlListPopFront(found)
+	}
 	return nil
 }

xmldsig_test.go

@@ -2,9 +2,8 @@ package xmlsec
 
 import (
 	"encoding/xml"
-	"strings"
-
 	. "gopkg.in/check.v1"
+	"strings"
 )
 
 type Envelope struct {
@@ -163,6 +162,207 @@ fBjXssrERn05kpBcrRfzou4r3DCgQFPhjxga</X509Certificate>
 	c.Assert(err, IsNil)
 }
 
+func (testSuite *XMLDSigTest) TestSignAndVerifyMultiple(c *C) {
+	expectedSignedString := `<?xml version="1.0"?>
+<Envelope xmlns="urn:envelope">
+  <Data1 ID="id1">
+		Hello, World!
+		<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
+			<SignedInfo>
+				<CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
+				<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
+				<Reference URI="#id1">
+					<Transforms>
+						<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
+					</Transforms>
+					<DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
+					<DigestValue>ixa7UpgiS2UJ37IG9HzhfK7z+Fo=</DigestValue>
+				</Reference>
+			</SignedInfo>
+			<SignatureValue>xaMgajZ9tBswZmIP5JoBwXMpD9W74fVbfWJ/HkfTHYkXNejOXT+UocvaGaVCqPNE
++6rzavcVq18agibmYCkm6w==</SignatureValue>
+			<KeyInfo>
+				<X509Data>
+					<X509Certificate>MIIDpzCCA1GgAwIBAgIJAK+ii7kzrdqvMA0GCSqGSIb3DQEBBQUAMIGcMQswCQYD
+VQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTE9MDsGA1UEChM0WE1MIFNlY3Vy
+aXR5IExpYnJhcnkgKGh0dHA6Ly93d3cuYWxla3NleS5jb20veG1sc2VjKTEWMBQG
+A1UEAxMNQWxla3NleSBTYW5pbjEhMB8GCSqGSIb3DQEJARYSeG1sc2VjQGFsZWtz
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+BgNVBAsTIFRlc3QgVGhpcmQgTGV2ZWwgUlNBIENlcnRpZmljYXRlMRYwFAYDVQQD
+Ew1BbGVrc2V5IFNhbmluMSEwHwYJKoZIhvcNAQkBFhJ4bWxzZWNAYWxla3NleS5j
+b20wXDANBgkqhkiG9w0BAQEFAANLADBIAkEA09BtD3aeVt6DVDkk0dI7Vh7Ljqdn
+sYmW0tbDVxxK+nume+Z9Sb4znbUKkWl+vgQATdRUEyhT2P+Gqrd0UBzYfQIDAQAB
+o4IBRTCCAUEwDAYDVR0TBAUwAwEB/zAsBglghkgBhvhCAQ0EHxYdT3BlblNTTCBH
+ZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYEFNf0xkZ3zjcEI60pVPuwDqTM
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+KTEQMA4GA1UECxMHUm9vdCBDQTEWMBQGA1UEAxMNQWxla3NleSBTYW5pbjEhMB8G
+CSqGSIb3DQEJARYSeG1sc2VjQGFsZWtzZXkuY29tggkAr6KLuTOt2q0wDQYJKoZI
+hvcNAQEFBQADQQAOXBj0yICp1RmHXqnUlsppryLCW3pKBD1dkb4HWarO7RjA1yJJ
+fBjXssrERn05kpBcrRfzou4r3DCgQFPhjxga</X509Certificate>
+				</X509Data>
+			</KeyInfo>
+		</Signature>
+		<Data2 ID="id2">
+			Hello, World!
+			<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
+				<SignedInfo>
+					<CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
+					<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
+					<Reference URI="#id2">
+						<Transforms>
+							<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
+						</Transforms>
+						<DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
+						<DigestValue>6hs7C+iZA45BBGAcaI0aNnMz+Ts=</DigestValue>
+					</Reference>
+				</SignedInfo>
+				<SignatureValue>F23IldNw0Gozri5ySU5Esopz7llkBrDJNHNgm+Ww93mrU5w1IrP0J7Cv0Xn19ro2
+QsO3oBVrpdMotMsFkbEVkA==</SignatureValue>
+				<KeyInfo>
+					<X509Data>
+						<X509Certificate>MIIDpzCCA1GgAwIBAgIJAK+ii7kzrdqvMA0GCSqGSIb3DQEBBQUAMIGcMQswCQYD
+VQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTE9MDsGA1UEChM0WE1MIFNlY3Vy
+aXR5IExpYnJhcnkgKGh0dHA6Ly93d3cuYWxla3NleS5jb20veG1sc2VjKTEWMBQG
+A1UEAxMNQWxla3NleSBTYW5pbjEhMB8GCSqGSIb3DQEJARYSeG1sc2VjQGFsZWtz
+ZXkuY29tMCAXDTE0MDUyMzE3NTUzNFoYDzIxMTQwNDI5MTc1NTM0WjCBxzELMAkG
+A1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExPTA7BgNVBAoTNFhNTCBTZWN1
+cml0eSBMaWJyYXJ5IChodHRwOi8vd3d3LmFsZWtzZXkuY29tL3htbHNlYykxKTAn
+BgNVBAsTIFRlc3QgVGhpcmQgTGV2ZWwgUlNBIENlcnRpZmljYXRlMRYwFAYDVQQD
+Ew1BbGVrc2V5IFNhbmluMSEwHwYJKoZIhvcNAQkBFhJ4bWxzZWNAYWxla3NleS5j
+b20wXDANBgkqhkiG9w0BAQEFAANLADBIAkEA09BtD3aeVt6DVDkk0dI7Vh7Ljqdn
+sYmW0tbDVxxK+nume+Z9Sb4znbUKkWl+vgQATdRUEyhT2P+Gqrd0UBzYfQIDAQAB
+o4IBRTCCAUEwDAYDVR0TBAUwAwEB/zAsBglghkgBhvhCAQ0EHxYdT3BlblNTTCBH
+ZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYEFNf0xkZ3zjcEI60pVPuwDqTM
+QygZMIHjBgNVHSMEgdswgdiAFP7k7FMk8JWVxxC14US1XTllWuN+oYG0pIGxMIGu
+MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTE9MDsGA1UEChM0WE1M
+IFNlY3VyaXR5IExpYnJhcnkgKGh0dHA6Ly93d3cuYWxla3NleS5jb20veG1sc2Vj
+KTEQMA4GA1UECxMHUm9vdCBDQTEWMBQGA1UEAxMNQWxla3NleSBTYW5pbjEhMB8G
+CSqGSIb3DQEJARYSeG1sc2VjQGFsZWtzZXkuY29tggkAr6KLuTOt2q0wDQYJKoZI
+hvcNAQEFBQADQQAOXBj0yICp1RmHXqnUlsppryLCW3pKBD1dkb4HWarO7RjA1yJJ
+fBjXssrERn05kpBcrRfzou4r3DCgQFPhjxga</X509Certificate>
+					</X509Data>
+				</KeyInfo>
+			</Signature>
+		</Data2>
+  </Data1>
+</Envelope>
+`
+	actualUnsignedString := `
+<Envelope xmlns="urn:envelope">
+  <Data1 ID="id1">
+		Hello, World!
+		<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
+			<SignedInfo>
+				<CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
+				<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
+				<Reference URI="#id1">
+					<Transforms>
+						<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
+					</Transforms>
+					<DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
+					<DigestValue/>
+				</Reference>
+			</SignedInfo>
+			<SignatureValue/>
+			<KeyInfo>
+				<X509Data>
+					<X509Certificate>MIIDpzCCA1GgAwIBAgIJAK+ii7kzrdqvMA0GCSqGSIb3DQEBBQUAMIGcMQswCQYD
+VQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTE9MDsGA1UEChM0WE1MIFNlY3Vy
+aXR5IExpYnJhcnkgKGh0dHA6Ly93d3cuYWxla3NleS5jb20veG1sc2VjKTEWMBQG
+A1UEAxMNQWxla3NleSBTYW5pbjEhMB8GCSqGSIb3DQEJARYSeG1sc2VjQGFsZWtz
+ZXkuY29tMCAXDTE0MDUyMzE3NTUzNFoYDzIxMTQwNDI5MTc1NTM0WjCBxzELMAkG
+A1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExPTA7BgNVBAoTNFhNTCBTZWN1
+cml0eSBMaWJyYXJ5IChodHRwOi8vd3d3LmFsZWtzZXkuY29tL3htbHNlYykxKTAn
+BgNVBAsTIFRlc3QgVGhpcmQgTGV2ZWwgUlNBIENlcnRpZmljYXRlMRYwFAYDVQQD
+Ew1BbGVrc2V5IFNhbmluMSEwHwYJKoZIhvcNAQkBFhJ4bWxzZWNAYWxla3NleS5j
+b20wXDANBgkqhkiG9w0BAQEFAANLADBIAkEA09BtD3aeVt6DVDkk0dI7Vh7Ljqdn
+sYmW0tbDVxxK+nume+Z9Sb4znbUKkWl+vgQATdRUEyhT2P+Gqrd0UBzYfQIDAQAB
+o4IBRTCCAUEwDAYDVR0TBAUwAwEB/zAsBglghkgBhvhCAQ0EHxYdT3BlblNTTCBH
+ZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYEFNf0xkZ3zjcEI60pVPuwDqTM
+QygZMIHjBgNVHSMEgdswgdiAFP7k7FMk8JWVxxC14US1XTllWuN+oYG0pIGxMIGu
+MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTE9MDsGA1UEChM0WE1M
+IFNlY3VyaXR5IExpYnJhcnkgKGh0dHA6Ly93d3cuYWxla3NleS5jb20veG1sc2Vj
+KTEQMA4GA1UECxMHUm9vdCBDQTEWMBQGA1UEAxMNQWxla3NleSBTYW5pbjEhMB8G
+CSqGSIb3DQEJARYSeG1sc2VjQGFsZWtzZXkuY29tggkAr6KLuTOt2q0wDQYJKoZI
+hvcNAQEFBQADQQAOXBj0yICp1RmHXqnUlsppryLCW3pKBD1dkb4HWarO7RjA1yJJ
+fBjXssrERn05kpBcrRfzou4r3DCgQFPhjxga</X509Certificate>
+				</X509Data>
+			</KeyInfo>
+		</Signature>
+		<Data2 ID="id2">
+			Hello, World!
+			<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
+				<SignedInfo>
+					<CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
+					<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
+					<Reference URI="#id2">
+						<Transforms>
+							<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
+						</Transforms>
+						<DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
+						<DigestValue/>
+					</Reference>
+				</SignedInfo>
+				<SignatureValue/>
+				<KeyInfo>
+					<X509Data>
+						<X509Certificate>MIIDpzCCA1GgAwIBAgIJAK+ii7kzrdqvMA0GCSqGSIb3DQEBBQUAMIGcMQswCQYD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</X509Certificate>
+					</X509Data>
+				</KeyInfo>
+			</Signature>
+		</Data2>
+  </Data1>
+</Envelope>
+`
+	opts := SignatureOptions{XMLID: []XMLIDOption{
+		{ElementName: "Data1", AttributeName: "ID"},
+		{ElementName: "Data2", AttributeName: "ID"},
+	}}
+
+	actualSignedString, err := Sign(testSuite.Key, []byte(actualUnsignedString), opts)
+	c.Assert(err, IsNil)
+	c.Assert(string(actualSignedString), Equals, expectedSignedString)
+
+	err = Verify(testSuite.Cert, actualSignedString, opts)
+	c.Assert(err, IsNil)
+
+	data1Sig := `<SignatureValue>xaMgajZ9tBswZmIP5JoBwXMpD9W74fVbfWJ/HkfTHYkXNejOXT+UocvaGaVCqPNE
++6rzavcVq18agibmYCkm6w==</SignatureValue>`
+	data2Sig := `<SignatureValue>F23IldNw0Gozri5ySU5Esopz7llkBrDJNHNgm+Ww93mrU5w1IrP0J7Cv0Xn19ro2
+QsO3oBVrpdMotMsFkbEVkA==</SignatureValue>`
+
+	breakData1 := strings.Replace(expectedSignedString, data1Sig, data2Sig, 1)
+	err = Verify(testSuite.Cert, []byte(breakData1), opts)
+	c.Assert(err, ErrorMatches, "signature verification failed")
+
+	breakData2 := strings.Replace(expectedSignedString, data2Sig, data1Sig, 1)
+	err = Verify(testSuite.Cert, []byte(breakData2), opts)
+	c.Assert(err, ErrorMatches, "signature verification failed")
+}
+
 func (testSuite *XMLDSigTest) TestConstructFromSignature(c *C) {
 	// Try again but this time construct the message from a struct having a Signature member
 	doc := Envelope{Data: "Hello, World!"}