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Implement attribute and property lookup for Trusted Types (#36422)
These algorithms are used to check whether an attribute/property can accept a Trusted Type. Part of #36258 Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>
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Tim van der Lippe
GitHub
parent
2c7aeca404
commit
0aa08042d5
7 changed files with 143 additions and 192 deletions
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@ -4,6 +4,7 @@
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use std::cell::RefCell;
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use dom_struct::dom_struct;
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use html5ever::{LocalName, Namespace, QualName, local_name, namespace_url, ns};
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use js::rust::HandleValue;
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use crate::dom::bindings::codegen::Bindings::TrustedTypePolicyFactoryBinding::{
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@ -85,6 +86,49 @@ impl TrustedTypePolicyFactory {
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// Step 9: Return policy.
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Ok(policy)
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}
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/// <https://w3c.github.io/trusted-types/dist/spec/#abstract-opdef-get-trusted-type-data-for-attribute>
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#[allow(clippy::if_same_then_else)]
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fn get_trusted_type_data_for_attribute(
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element: QualName,
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attribute: String,
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attribute_namespace: Option<Namespace>,
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) -> Option<DOMString> {
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// Step 1: Let data be null.
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let mut data = None;
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// Step 2: If attributeNs is null, and attribute is the name of an event handler content attribute, then:
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// TODO(36258): look up event handlers
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// Step 3: Find the row in the following table, where element is in the first column,
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// attributeNs is in the second column, and attribute is in the third column.
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// If a matching row is found, set data to that row.
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if element.ns == ns!(html) &&
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element.local == local_name!("iframe") &&
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attribute_namespace.is_none() &&
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attribute == "srcdoc"
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{
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data = Some(DOMString::from("TrustedHTML"))
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} else if element.ns == ns!(html) &&
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element.local == local_name!("script") &&
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attribute_namespace.is_none() &&
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attribute == "src"
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{
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data = Some(DOMString::from("TrustedScriptURL"))
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} else if element.ns == ns!(svg) &&
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element.local == local_name!("script") &&
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attribute_namespace.is_none() &&
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attribute == "href"
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{
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data = Some(DOMString::from("TrustedScriptURL"))
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} else if element.ns == ns!(svg) &&
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element.local == local_name!("script") &&
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attribute_namespace == Some(ns!(xlink)) &&
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attribute == "href"
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{
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data = Some(DOMString::from("TrustedScriptURL"))
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}
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// Step 4: Return data.
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data
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}
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}
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impl TrustedTypePolicyFactoryMethods<crate::DomTypeHolder> for TrustedTypePolicyFactory {
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@ -135,23 +179,99 @@ impl TrustedTypePolicyFactoryMethods<crate::DomTypeHolder> for TrustedTypePolicy
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/// <https://www.w3.org/TR/trusted-types/#dom-trustedtypepolicyfactory-getattributetype>
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fn GetAttributeType(
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&self,
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_: DOMString,
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_: DOMString,
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_: Option<DOMString>,
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_: Option<DOMString>,
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tag_name: DOMString,
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attribute: DOMString,
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element_namespace: Option<DOMString>,
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attribute_namespace: Option<DOMString>,
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) -> Option<DOMString> {
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// TODO(36258): implement algorithm
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Some(DOMString::from("".to_string()))
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// Step 1: Set localName to tagName in ASCII lowercase.
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let local_name = tag_name.to_ascii_lowercase();
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// Step 2: Set attribute to attribute in ASCII lowercase.
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let attribute = attribute.to_ascii_lowercase();
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// Step 3: If elementNs is null or an empty string, set elementNs to HTML namespace.
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let element_namespace = match element_namespace {
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Some(namespace) if !namespace.is_empty() => Namespace::from(namespace),
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Some(_) | None => ns!(html),
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};
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// Step 4: If attrNs is an empty string, set attrNs to null.
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let attribute_namespace = match attribute_namespace {
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Some(namespace) if !namespace.is_empty() => Some(Namespace::from(namespace)),
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Some(_) | None => None,
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};
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// Step 5: Let interface be the element interface for localName and elementNs.
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let interface = QualName::new(None, element_namespace, LocalName::from(local_name));
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// Step 6: Let expectedType be null.
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let mut expected_type = None;
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// Step 7: Set attributeData to the result of Get Trusted Type data for attribute algorithm,
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// with the following arguments: interface as element, attribute, attrNs
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let attribute_data = TrustedTypePolicyFactory::get_trusted_type_data_for_attribute(
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interface,
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attribute,
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attribute_namespace,
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);
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// Step 8: If attributeData is not null, then set expectedType to the interface’s name of
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// the value of the fourth member of attributeData.
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if let Some(trusted_type) = attribute_data {
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expected_type = Some(trusted_type)
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}
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// Step 9: Return expectedType.
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expected_type
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}
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/// <https://www.w3.org/TR/trusted-types/#dom-trustedtypepolicyfactory-getpropertytype>
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#[allow(clippy::if_same_then_else)]
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fn GetPropertyType(
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&self,
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_: DOMString,
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_: DOMString,
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_: Option<DOMString>,
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tag_name: DOMString,
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property: DOMString,
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element_namespace: Option<DOMString>,
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) -> Option<DOMString> {
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// TODO(36258): implement algorithm
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Some(DOMString::from("".to_string()))
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// Step 1: Set localName to tagName in ASCII lowercase.
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let local_name = tag_name.to_ascii_lowercase();
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// Step 2: If elementNs is null or an empty string, set elementNs to HTML namespace.
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let element_namespace = match element_namespace {
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Some(namespace) if !namespace.is_empty() => Namespace::from(namespace),
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Some(_) | None => ns!(html),
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};
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// Step 3: Let interface be the element interface for localName and elementNs.
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let interface = QualName::new(None, element_namespace, LocalName::from(local_name));
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// Step 4: Let expectedType be null.
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let mut expected_type = None;
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// Step 5: Find the row in the following table, where the first column is "*" or interface’s name,
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// and property is in the second column. If a matching row is found, set expectedType to
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// the interface’s name of the value of the third column.
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let property = property.str();
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if interface.ns == ns!(html) &&
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interface.local == local_name!("iframe") &&
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property == "srcdoc"
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{
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expected_type = Some(DOMString::from("TrustedHTML"))
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} else if interface.ns == ns!(html) &&
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interface.local == local_name!("script") &&
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property == "innerText"
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{
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expected_type = Some(DOMString::from("TrustedScript"))
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} else if interface.ns == ns!(html) &&
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interface.local == local_name!("script") &&
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property == "src"
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{
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expected_type = Some(DOMString::from("TrustedScriptURL"))
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} else if interface.ns == ns!(html) &&
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interface.local == local_name!("script") &&
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property == "text"
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{
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expected_type = Some(DOMString::from("TrustedScript"))
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} else if interface.ns == ns!(html) &&
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interface.local == local_name!("script") &&
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property == "textContent"
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{
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expected_type = Some(DOMString::from("TrustedScript"))
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} else if property == "innerHTML" {
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expected_type = Some(DOMString::from("TrustedHTML"))
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} else if property == "outerHTML" {
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expected_type = Some(DOMString::from("TrustedHTML"))
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}
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// Step 6: Return expectedType.
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expected_type
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}
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/// <https://www.w3.org/TR/trusted-types/#dom-trustedtypepolicyfactory-defaultpolicy>
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fn GetDefaultPolicy(&self) -> Option<DomRoot<TrustedTypePolicy>> {
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