我使用巴西“Nota Fiscal Eletronica”项目,在该项目中,他们定义了一种标记XML文档的标准方法。
最近,他们开始要求标签之间绝对没有空格,包括签名标签(*)。
我们碰巧使用apache的XMLSignature,似乎无法生成一个无痕的签名。
如果我在签名后删除空格,签名就会被破坏。
我无法更改规范化器/变换器组,因为它们是预定义的。
我在XMLSignature API中找不到一个选项或参数来控制缩进或空格。
以下是代码:
// the element where to insert the signature
Element element = ...;
X509Certificate cert = ...;
PrivateKey privateKey = ...;
XMLSignature signer =
new XMLSignature(doc, "http://xml-security",
XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA1);
element.appendChild(signer.getElement());
Transforms transforms = new Transforms(doc);
// Define as regras de transformação e canonicalização do documento
// XML, necessário para fazer a verificação do parsing e da
// assinatura pelos destinatários
transforms.addTransform(Transforms.TRANSFORM_ENVELOPED_SIGNATURE); //, xpath.getElementPlusReturns());
transforms.addTransform(Transforms.TRANSFORM_C14N_OMIT_COMMENTS); //,xpath.getElementPlusReturns());
String id = "";
id = ((Element) element.getElementsByTagName("infNFe").item(0)).getAttributeNode("Id").getNodeValue();
signer.addDocument("#" + id, transforms,
Constants.ALGO_ID_DIGEST_SHA1);
signer.addKeyInfo(cert);
signer.sign(privateKey);
以下是生成的签名(摘录):
<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="#NFe43110189716583000165550010000076011492273645">
<Transforms>
<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
<Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
</Transforms>
<DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
<DigestValue>fas0ra5uRskQgRHSrIYhEjFEjKQ=</DigestValue>
</Reference>
</SignedInfo>
<SignatureValue>
2RGltUZy0HfNoiKtVanAeN+JUPyglWDuQNnMudSgA7kESoHBZ/q/GMbc+xMSN1eV8u7+2PxSKl1T
Zl592FWmCSAkL8pwMujDxJ4iTLU20Hf0dNF7oGcyB+g9GgbipW2udq0kwJLz6HzXUD/Evf/0y+3T
NtsXeIaA6A29ttD/UEs=
</SignatureValue>
<KeyInfo>
<X509Data>
<X509Certificate>
MIIFqTCCBJGgAwIBAgIEQeNSuzANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJicjETMBEGA1UE
ChMKSUNQLUJyYXNpbDEgMB4GA1UECxMXQ2FpeGEgRWNvbm9taWNhIEZlZGVyYWwxFDASBgNVBAMT
C0FDIENBSVhBIFBKMB4XDTEwMDYwODE5MjQwNVoXDTExMDYwODE5NTQwNVowgYQxCzAJBgNVBAYT
AmJyMRMwEQYDVQQKEwpJQ1AtQnJhc2lsMSAwHgYDVQQLExdDYWl4YSBFY29ub21pY2EgRmVkZXJh
bDEUMBIGA1UECxMLQUMgQ0FJWEEgUEoxKDAmBgNVBAMTH0EgQlVITEVSIFNBIENVUlRVTUU6NDA5
NDI0OTAwMTAwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAOFxgvG35RQWgXec4zVrzoUHolnJ
fP76rpO2Vo40593W9Gf0WwHt36gVmli0ZeQitFmzFSoE5KhgXQGZg6RpV3WJUFcIrPBHPdqOSfiB
988kf962P+j8fZ38BNmo7TV9H9hMBkV9bD/QOe73wFDc+rT6/9io++Z+7/wup/3glKntAgMBAAGj
ggLOMIICyjAOBgNVHQ8BAf8EBAMCBeAwVwYDVR0gBFAwTjBMBgZgTAECAQkwQjBABggrBgEFBQcC
ARY0aHR0cDovL2ljcC5jYWl4YS5nb3YuYnIvcmVwb3NpdG9yaW8vZHBjYWNjYWl4YXBqLnBkZjAp
BgNVHSUEIjAgBggrBgEFBQcDAgYIKwYBBQUHAwQGCisGAQQBgjcUAgIwgbYGA1UdEQSBrjCBq4EV
YnVobGVyQGFidWhsZXIuY29tLmJyoD4GBWBMAQMEoDUEMzE0MDkxOTQ2NDA5NDI0OTAwMTAxMDg0
NDcwODE3NTAwMDAwODAzMjkyMjM1NlNTUCBSU6AeBgVgTAEDAqAVBBNOQUlSIEJVSExFUiBTQ0hO
RUNLoBkGBWBMAQMDoBAEDjg5NzE2NTgzMDAwMTY1oBcGBWBMAQMHoA4EDDAwMDAwMDAwMDAwMDCC
ATIGA1UdHwSCASkwggElMIGuoIGroIGohjJodHRwOi8vaWNwLmNhaXhhLmdvdi5ici9yZXBvc2l0
b3Jpby9BQ0NBSVhBUEoxLmNybIY0aHR0cDovL2ljcDIuY2FpeGEuZ292LmJyL3JlcG9zaXRvcmlv
Mi9BQ0NBSVhBUEoxLmNybIY8aHR0cDovL3JlcG9zaXRvcmlvLmljcGJyYXNpbC5nb3YuYnIvbGNy
L2NhaXhhL0FDQ0FJWEFQSjEuY3JsMHKgcKBupGwwajELMAkGA1UEBhMCYnIxEzARBgNVBAoTCklD
UC1CcmFzaWwxIDAeBgNVBAsTF0NhaXhhIEVjb25vbWljYSBGZWRlcmFsMRQwEgYDVQQDEwtBQyBD
QUlYQSBQSjEOMAwGA1UEAxMFQ1JMNDEwHwYDVR0jBBgwFoAUjkAvCv4T1ao5oHZ0htO8fcfx5c8w
CQYDVR0TBAIwADAZBgkqhkiG9n0HQQAEDDAKGwRWNy4xAwIDqDANBgkqhkiG9w0BAQUFAAOCAQEA
nZHUvdnZsiCIDjKm1zHehbtuDtDJha4O4FZ03J74Y+AxyAFs/4JED+xUvZ5jFuEsdqgA0V/dxUFy
Uz/ca10Ievd578GQdGwYl1GFhRtO/SlxeaOEf7eDdGOWXO3VmUA3NmNo0X8RRTIoifnhpDXu7RbN
5sijyH/uXyRFWX9XH2N0U/r3oJtNKXsvoUlbDrkalgkuLzLKsaEj0TkwisXO3cmMoWGuBpAZC+46
e4x/2vTqOvYkzZO+O9NLi0YWSYY7OJKiKBjMC6MzdlPM9VTkIwO9WvWEMdbU0/jhO2cMcVMzNZc1
r6ZmdTDrwqV3elSTkQtJ0RIZNgMJUn+Y8c7Aog==
</X509Certificate>
</X509Data>
</KeyInfo>
</Signature>
注意(不需要的)换行符。
非常感谢任何帮助。
提前多多感谢。
(*)澄清:新规则禁止仅元素标记之间的空格(或任何其他文本)。例如,这将是允许:
<a><b>
text
inside
tag
</b></a>
虽然这将是禁止的:
<a>
<b>text</b>
</a>
因为在后一种情况下,空格(换行符)在两个标记之间,换句话说,放在仅元素标记内。
答案 0 :(得分:8)
您可以简单地设置-Dorg.apache.xml.security.ignoreLineBreaks = true来禁用XML生成中的'\ n'。 original mail
答案 1 :(得分:4)
签名块将二进制信息编码为Base64,必须遵循一些格式化,包括换行符(参见http://en.wikipedia.org/wiki/Base64)。所以你根本无法在不改变信息的情况下删除它们。
一种更好的方法来恢复网络流量,就是在发送数据之前使用压缩。
答案 2 :(得分:2)
答案 3 :(得分:1)
我找到了一个(可耻的)解决方案。
这不是预期的解决方案:用javax.xml.crypto API替换apache的API。
以下是更改后的代码:
// the element where to insert the signature
Element element = ...;
X509Certificate cert = ...;
PrivateKey privateKey = ...;
// Create a DOM XMLSignatureFactory that will be used to
// generate the enveloped signature.
XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");
// Create a Reference to the enveloped document (in this case,
// you are signing the whole document, so a URI of "" signifies
// that, and also specify the SHA1 digest algorithm and
// the ENVELOPED Transform.
List<Transform> transformList = new ArrayList<Transform>();
TransformParameterSpec tps = null;
Transform envelopedTransform;
try {
envelopedTransform = fac.newTransform(Transform.ENVELOPED,
tps);
Transform c14NTransform = fac.newTransform(
"http://www.w3.org/TR/2001/REC-xml-c14n-20010315", tps);
transformList.add(envelopedTransform);
transformList.add(c14NTransform);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Erro inesperado: " + e.getMessage(), e);
} catch (InvalidAlgorithmParameterException e) {
throw new RuntimeException("Erro inesperado: " + e.getMessage(), e);
}
// Create the KeyInfo containing the X509Data.
KeyInfoFactory kif = fac.getKeyInfoFactory();
List<Serializable> x509Content = new ArrayList<Serializable>();
x509Content.add(cert);
javax.xml.crypto.dsig.keyinfo.X509Data xd = kif.newX509Data(x509Content);
KeyInfo ki = kif.newKeyInfo(Collections.singletonList(xd));
// Obtem elemento do documento a ser assinado, será criado uma
// REFERENCE para o mesmo
Element el = (Element) element.getElementsByTagName(subTag).item(0);
String id = el.getAttribute("Id");
// Create a DOM XMLSignatureFactory that will be used to
// generate the enveloped signature.
Reference ref;
javax.xml.crypto.dsig.SignedInfo si;
try {
ref = fac.newReference("#" + id, fac.newDigestMethod(
DigestMethod.SHA1, null), transformList, null, null);
// Create the SignedInfo.
si = fac.newSignedInfo(fac.newCanonicalizationMethod(
CanonicalizationMethod.INCLUSIVE,
(C14NMethodParameterSpec) null), fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null),
Collections.singletonList(ref));
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Erro inesperado: " + e.getMessage(), e);
} catch (InvalidAlgorithmParameterException e) {
throw new RuntimeException("Erro inesperado: " + e.getMessage(), e);
}
// Create the XMLSignature, but don't sign it yet.
javax.xml.crypto.dsig.XMLSignature signature = fac.newXMLSignature(si, ki);
// Marshal, generate, and sign the enveloped signature.
// Create a DOMSignContext and specify the RSA PrivateKey and
// location of the resulting XMLSignature's parent element.
DOMSignContext dsc = new DOMSignContext(privateKey, element);
signature.sign(dsc);
此API生成签名,标签之间根本没有空格。
仍然希望看到apache API的解决方案,因为此代码已经非常成熟,我们不希望冒更改整个签名实现的风险。
答案 4 :(得分:1)
我们只需要设置&#34; true&#34;值&#34; ignoreLineBreaks&#34;参数, 引起&#39;默认值为false,这允许签名API添加LineBreaks
这是避免或删除LineBreaks的代码
Field f = XMLUtils.class.getDeclaredField("ignoreLineBreaks");
f.setAccessible(true);
f.set(null, Boolean.TRUE);
然后,我们可以使用下一个代码行确保新值为true
System.err.println(XMLUtils.ignoreLineBreaks());
我遇到了同样的问题,这对我有用。
答案 5 :(得分:1)
您可以尝试:
System.setProperty("org.apache.xml.security.ignoreLineBreaks", "true");
答案 6 :(得分:1)
您可以尝试:
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
let selectedRow = pickerView.selectedRow(inComponent: 0)
print(selectedRow)
}
或
static {
System.setProperty("com.sun.org.apache.xml.internal.security.ignoreLineBreaks", "true");
com.sun.org.apache.xml.internal.security.Init.init();
}
将其添加到执行签名工作的类中。
答案 7 :(得分:0)
XML签名在使用C14N算法进行规范化之后,以给定元素(即DOM中的子树)开始签署XML文档的一部分。您使用的标准C14N算法保留了换行符和空格(请参阅http://www.w3.org/TR/xml-c14n#Example-WhitespaceInContent)。
因此,原始文档的已签名部分(包括最后一个数据标记和<Signature>
标记之间以及</Signature>
与下一个结束标记之间的所有换行符)* 必须< / em>被保留以便不改变签名。 Signature
元素中的换行符和空格并不重要,可以在不改变签名的情况下删除。
这是一个例子:
<root id="signedpart">
<data>
...
</data>
<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
<SignedInfo>
<Reference URI="#signedpart">
...
</Reference>
</SignedInfo>
</Signature>
</root>
以下是您可能的选择:
定义您自己的C14N算法,该算法将自行删除空格和换行符。我会劝阻这一点,因为另一方也必须使用这种非标准的C14N算法。
删除行中的空格 签名之前的XML (之后可能删除签名中的空格)
通过这个例子,它将为您提供以下签名的XML:
<root id="signedpart"><data>...</data><Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
<SignedInfo>
<Reference URI="#signedpart">
...
</Reference>
</SignedInfo>
</Signature></root>
并删除签名中的空格
<root id="signedpart"><data>...</data><Signature xmlns="http://www.w3.org/2000/09/xmldsig#"><SignedInfo><Reference URI="#signedpart">...</Reference></SignedInfo></Signature></root>