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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 a ${3:thing}. */",
"private DataFlow::Node ${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 a ${3:thing}. */",
"DataFlow::Node $1() {",
" result = $1(DataFlow::TypeTracker::end())",
"}"
],
"description": "Type tracking predicate",
},
"Type tracking module": {
"scope": "ql",
"prefix": "type tracking module",
"body": [
"// ---------------------------------------------------------------------------",
"// ${1:modulename}",
"// ---------------------------------------------------------------------------",
"/** Gets a reference to the `$1` module. */",
"private DataFlow::Node $1(DataFlow::TypeTracker t) {",
" t.start() and",
" result = DataFlow::importNode(\"$1\")",
" or",
" exists(DataFlow::TypeTracker t2 | result = $1(t2).track(t2, t))",
"}",
"",
"/** Gets a reference to the `$1` module. */",
"DataFlow::Node $1() { result = $1(DataFlow::TypeTracker::end()) }",
"",
"/**",
" * Gets a reference to the attribute `attr_name` of the `$1` module.",
" * WARNING: Only holds for a few predefined attributes.",
" */",
"private DataFlow::Node $1_attr(DataFlow::TypeTracker t, string attr_name) {",
" attr_name in [\"${2:name}\"] and",
" (",
" t.start() and",
" result = DataFlow::importNode(\"$1\" + \".\" + attr_name)",
" or",
" t.startInAttr(attr_name) and",
" result = $1()",
" )",
" or",
" // Due to bad performance when using normal setup with `$1_attr(t2, attr_name).track(t2, t)`",
" // we have inlined that code and forced a join",
" exists(DataFlow::TypeTracker t2 |",
" exists(DataFlow::StepSummary summary |",
" $1_attr_first_join(t2, attr_name, result, summary) and",
" t = t2.append(summary)",
" )",
" )",
"}",
"",
"pragma[nomagic]",
"private predicate $1_attr_first_join(",
" DataFlow::TypeTracker t2, string attr_name, DataFlow::Node res, DataFlow::StepSummary summary",
") {",
" DataFlow::StepSummary::step($1_attr(t2, attr_name), res, summary)",
"}",
"",
"/**",
" * Gets a reference to the attribute `attr_name` of the `$1` module.",
" * WARNING: Only holds for a few predefined attributes.",
" */",
"private DataFlow::Node $1_attr(string attr_name) {",
" result = $1_attr(DataFlow::TypeTracker::end(), attr_name)",
"}",
"",
"/** Provides models for the `$1` module. */",
"module $1 {",
"",
"}",
],
"description": "Type tracking module",
},
"Type tracking module member": {
"scope": "ql",
"prefix": "type tracking module member",
"body": [
"/** Gets a reference to the `${1:module}.${2:member}` ${3:object/class}. */",
"private DataFlow::Node ${4:$2}(DataFlow::TypeTracker t) {",
" t.start() and",
" result = DataFlow::importNode(\"$1.$2\")",
" or",
" t.startInAttr(\"$2\") and",
" result = $1()",
" or",
" exists(DataFlow::TypeTracker t2 | result = $4(t2).track(t2, t))",
"}",
" ",
"/** Gets a reference to the `$1.$2` $3. */",
"DataFlow::Node $4() { result = $4(DataFlow::TypeTracker::end()) }",
],
"description": "Type tracking module member",
},
"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 submodule": {
"scope": "ql",
"prefix": "type tracking submodule",
"body": [
" // -------------------------------------------------------------------------",
" // ${1:parent}.${2:submodule}",
" // -------------------------------------------------------------------------",
" /** Gets a reference to the `$1.$2` module. */",
" DataFlow::Node $2() { result = $1_attr(\"$2\") }",
"",
" /** Provides models for the `$1.$2` module */",
" module $2 {",
" /**",
" * Gets a reference to the attribute `attr_name` of the `$1.$2` module.",
" * WARNING: Only holds for a few predefined attributes.",
" */",
" private DataFlow::Node $2_attr(DataFlow::TypeTracker t, string attr_name) {",
" attr_name in [\"$3\"] and",
" (",
" t.start() and",
" result = DataFlow::importNode(\"$1.$2\" + \".\" + attr_name)",
" or",
" t.startInAttr(attr_name) and",
" result = $2()",
" )",
" or",
" // Due to bad performance when using normal setup with `$2_attr(t2, attr_name).track(t2, t)`",
" // we have inlined that code and forced a join",
" exists(DataFlow::TypeTracker t2 |",
" exists(DataFlow::StepSummary summary |",
" $2_attr_first_join(t2, attr_name, result, summary) and",
" t = t2.append(summary)",
" )",
" )",
" }",
"",
" pragma[nomagic]",
" private predicate $2_attr_first_join(",
" DataFlow::TypeTracker t2, string attr_name, DataFlow::Node res,",
" DataFlow::StepSummary summary",
" ) {",
" DataFlow::StepSummary::step($2_attr(t2, attr_name), res, summary)",
" }",
"",
" /**",
" * Gets a reference to the attribute `attr_name` of the `$1.$2` module.",
" * WARNING: Only holds for a few predefined attributes.",
" */",
" private DataFlow::Node $2_attr(string attr_name) {",
" result = $2_attr(DataFlow::TypeTracker::end(), attr_name)",
" }",
" }",
],
"description": "Type tracking submodule",
},
"Type tracking class": {
"scope": "ql",
"prefix": "type tracking class",
"body": [
" /**",
" * Provides models for the `${1:module}.${2:classname}` class",
" *",
" * See ${6:apiref}.",
" */",
" module $2 {",
" /** Gets a reference to the `$1.$2` class. */",
" private DataFlow::Node classRef(DataFlow::TypeTracker t) {",
" t.start() and",
" result = ${4:module}_attr(\"$2\")",
" or",
" // TODO: remove/expand this part of the template as needed",
" // Handle `${5:toplevel}.$2` alias",
" t.start() and",
" result = $5_attr(\"$2\")",
" or",
" exists(DataFlow::TypeTracker t2 | result = classRef(t2).track(t2, t))",
" }",
"",
" /** Gets a reference to the `$1.$2` class. */",
" DataFlow::Node classRef() { result = classRef(DataFlow::TypeTracker::end()) }",
"",
" /**",
" * A source of instances of `$1.$2`, 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 `$2::instance()` to get references to instances of `$1.$2`.",
" */",
" abstract class InstanceSource extends DataFlow::Node { }",
"",
" /** A direct instantiation of `$1.$2`. */",
" private class ClassInstantiation extends InstanceSource, DataFlow::CfgNode {",
" override CallNode node;",
"",
" ClassInstantiation() { node.getFunction() = classRef().asCfgNode() }",
" }",
"",
" /** Gets a reference to an instance of `$1.$2`. */",
" private DataFlow::Node 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 `$1.$2`. */",
" DataFlow::Node instance() { result = instance(DataFlow::TypeTracker::end()) }",
" }",
],
"description": "Type tracking class",
},
}
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