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Added support for custom signature childs #8

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Merged
merged 1 commit into from
Apr 23, 2025
Merged

Added support for custom signature childs #8

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20 changes: 18 additions & 2 deletions lib/src/signed_xml.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,7 @@ class SignedXml {
String? keyInfo;
final idAttributes = ['Id', 'ID', 'id'];
late List<String> implicitTransforms;
final customSignatureChilds = <String>[];

/// Xml signature implementation
///
Expand Down Expand Up @@ -596,6 +597,10 @@ class SignedXml {
isEmptyUri));
}

void addCustomSignatureChild(String node) {
customSignatureChilds.add(node);
}

/// Compute the signature of the given xml (using the already defined settings)
///
/// Options:
Expand Down Expand Up @@ -670,6 +675,7 @@ class SignedXml {
StringBuffer('<${currentPrefix}Signature ${signatureAttrs.join(' ')}>')
..write(_createSignedInfo(doc, prefix))
..write(_getKeyInfo(prefix))
..write(customSignatureChilds.join(''))
..write('</${currentPrefix}Signature>');

_originalXmlWithIds = doc.toString();
Expand Down Expand Up @@ -801,8 +807,18 @@ class SignedXml {
for (final ref in references) {
final nodes = XmlXPath.node(doc).query(ref.xpath ?? '');
if (nodes.nodes.isEmpty) {
throw ArgumentError(
'the following xpath cannot be signed because it was not found: ${ref.xpath}');
//Search if the xpath is in customSignatureChilds
for (final customSignatureChild in customSignatureChilds) {
final customSignatureChildXml = parseFromString(customSignatureChild);
final customSignatureChildQuery = XmlXPath.node(customSignatureChildXml).query(ref.xpath ?? '');
if (customSignatureChildQuery.nodes.isNotEmpty) {
nodes.nodes.add(customSignatureChildQuery.node!);
}
}

if (nodes.nodes.isEmpty) {
throw ArgumentError('the following xpath cannot be signed because it was not found: ${ref.xpath}');
}
}

for (final node in nodes.nodes) {
Expand Down