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{
// Place your python workspace snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and
// description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope
// is left empty or omitted, the snippet gets applied to all languages. The prefix is what is
// used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders.
// Placeholders with the same ids are connected.
// Example:
// "Print to console": {
// "scope": "javascript,typescript",
// "prefix": "log",
// "body": [
// "console.log('$1');",
// "$2"
// ],
// "description": "Log output to console"
// }
"Has relative path": {
"scope": "ql",
"prefix": "has relative path",
"body": [
"exists($1.getLocation().getFile().getRelativePath())"
],
"description": "has relative path",
},
"Exists": {
"scope": "ql",
"prefix": "exists",
"body": [
"exists(${1:DataFlow::Node node} |",
" $2",
")"
],
"description": "Exists clause",
},
"Predicate": {
"scope": "ql",
"prefix": "predicate",
"body": [
"predicate ${1:isFoo}(${2:DataFlow::Node node}) {",
" ${3:any()}",
"}"
],
"description": "Predicate",
},
"Class": {
"scope": "ql",
"prefix": "class",
"body": [
"class ${1:MyClass} extends ${2:DataFlow::MethodCallNode} {",
" $1() { ${3:getMethodName() = \"foo\"} }",
"",
" DataFlow::Node ${4:getThing}() { result = ${5:getArgument(0)} }",
"}"
],
"description": "Class",
},
"Abstract class": {
"scope": "ql",
"prefix": "abstract class",
"body": [
"abstract class ${1:AdditionalThing} extends ${2:DataFlow::Node} {",
" abstract ${3:DataFlow::Node} ${4:getThing}($5);",
"}"
],
"description": "Class",
},
"Class::Range": {
"scope": "ql",
"prefix": "range class",
"body": [
"class ${1:MyClass} extends ${2:DataFlow::Node} {",
" $1::Range range;",
"",
" $1() { this = range }",
"",
" ${3:DataFlow::Node} ${4:getThing}() { result = range.$4() }",
"}",
"",
"module $1 {",
" abstract class Range extends $2 {",
" abstract $3 $4();",
" }",
"}",
],
"description": "Class with ::Range pattern",
},
"Class::Range delegate": {
"scope": "ql",
"prefix": "range delegate",
"body": [
"${1:DataFlow::Node} ${2:getThing}() { result = range.$2() }"
],
"description": "Predicate that delegates to range class",
},
"Type tracking predicate": {
"scope": "ql",
"prefix": "type tracking",
"body": [
"/** Gets a reference to ${3:a thing}. */",
"private DataFlow::TypeTrackingNode ${1:myType}(DataFlow::TypeTracker t) {",
" t.start() and",
" result = ${2:value}",
" or",
" exists(DataFlow::TypeTracker t2 |",
" result = $1(t2).track(t2, t)",
" )",
"}",
"",
"/** Gets a reference to $3. */",
"DataFlow::Node $1() {",
" $1(DataFlow::TypeTracker::end()).flowsTo(result)",
"}"
],
"description": "Type tracking predicate",
},
"Taint tracking configuration": {
"scope": "ql",
"prefix": "taint tracking",
"body": [
"/** @kind path-problem */",
"import python",
"import experimental.dataflow.DataFlow",
"import experimental.dataflow.TaintTracking",
"import experimental.semmle.python.Concepts",
"import experimental.dataflow.RemoteFlowSources",
"import DataFlow::PathGraph",
"class ${1:Config} extends TaintTracking::Configuration {",
" $1() { this = \"$1\" } ",
"",
" override predicate isSource(DataFlow::Node node) {",
" ${2:none()}",
" }",
"",
" override predicate isSink(DataFlow::Node node) {",
" ${3:none()}",
" }",
"}",
"",
"from $1 cfg, DataFlow::PathNode source, DataFlow::PathNode sink",
"where cfg.hasFlowPath(source, sink)",
"select sink, source, sink, \"taint from $@\", source.getNode(), \"here\""
]
},
"Type tracking class": {
"scope": "ql",
"prefix": "type tracking class",
"body": [
"/**",
" * Provides models for the `${TM_SELECTED_TEXT}` class",
" *",
" * See ${1:https://apiref (TODO)}.",
" */",
"module ${TM_SELECTED_TEXT/^(.*)\\.([^.]+)$/$2/} {",
" /** Gets a reference to the `${TM_SELECTED_TEXT}` class. */",
" private API::Node classRef() {",
" result = API::moduleImport(\"${TM_SELECTED_TEXT/\\.([^.]+)/\").getMember(\"$1/g}\")",
" }",
"",
" /**",
" * A source of instances of `${TM_SELECTED_TEXT}`, extend this class to model new instances.",
" *",
" * This can include instantiations of the class, return values from function",
" * calls, or a special parameter that will be set when functions are called by an external",
" * library.",
" *",
" * Use the predicate `${TM_SELECTED_TEXT/^(.*)\\.([^.]+)$/$2/}::instance()` to get references to instances of `${TM_SELECTED_TEXT}`.",
" */",
" abstract class InstanceSource extends DataFlow::LocalSourceNode { }",
"",
" /** A direct instantiation of `${TM_SELECTED_TEXT}`. */",
" private class ClassInstantiation extends InstanceSource, DataFlow::CallCfgNode {",
" ClassInstantiation() { this = classRef().getACall() }",
" }",
"",
" /** Gets a reference to an instance of `${TM_SELECTED_TEXT}`. */",
" private DataFlow::TypeTrackingNode instance(DataFlow::TypeTracker t) {",
" t.start() and",
" result instanceof InstanceSource",
" or",
" exists(DataFlow::TypeTracker t2 | result = instance(t2).track(t2, t))",
" }",
"",
" /** Gets a reference to an instance of `${TM_SELECTED_TEXT}`. */",
" DataFlow::Node instance() { instance(DataFlow::TypeTracker::end()).flowsTo(result) }",
"",
" /**",
" * Taint propagation for `${TM_SELECTED_TEXT}`.",
" */",
" private class InstanceTaintSteps extends InstanceTaintStepsHelper {",
" InstanceTaintSteps() { this = \"${TM_SELECTED_TEXT}\" }",
" ",
" override DataFlow::Node getInstance() { result = instance() }",
" ",
" override string getAttributeName() { none() }",
" ",
" override string getMethodName() { none() }",
" ",
" override string getAsyncMethodName() { none() }",
" }",
"",
" /**",
" * Extra taint propagation for `${TM_SELECTED_TEXT}`, not covered by `InstanceTaintSteps`.",
" */",
" private class AdditionalTaintStep extends TaintTracking::AdditionalTaintStep {",
" override predicate step(DataFlow::Node nodeFrom, DataFlow::Node nodeTo) {",
" // TODO",
" none()",
" }",
" }",
"}",
],
"description": "Type tracking class (select full class path before inserting)",
},
"API graph .getMember chain": {
"scope": "ql",
"prefix": "api graph .getMember chain",
"body": [
"API::moduleImport(\"${TM_SELECTED_TEXT/\\.([^.]+)/\").getMember(\"$1/g}\")"
],
"description": "API graph .getMember chain (select full path before inserting)",
},
"debug partial flow": {
"scope": "ql",
"prefix": "debug partial flow",
"body": [
"// put the line below inside the configuration",
"// override int explorationLimit() { result = 5 }",
"// and then run quick evaluation on the predicate below",
"// (and potentially limit the set of sources)",
"predicate debugPartialFlow(Location loc, DataFlow::PartialPathNode node, int dist) {",
" loc = node.getNode().getLocation() and",
" exists(loc.getFile().getRelativePath()) and",
" exists(Configuration config, DataFlow::PartialPathNode source |",
" config.hasPartialFlow(source, node, dist)",
" )",
"}",
],
"description": "debug partial flow",
},
}
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