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Java: Add localExprFlow and localExprTaint. #1795

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Merged
lcartey merged 1 commit into from
Aug 28, 2019
Merged

Java: Add localExprFlow and localExprTaint. #1795

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6 changes: 6 additions & 0 deletions java/ql/src/semmle/code/java/dataflow/internal/DataFlowUtil.qll
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Original file line number Diff line number Diff line change
Expand Up @@ -334,6 +334,12 @@ private module ThisFlow {
*/
predicate localFlow(Node node1, Node node2) { localFlowStep*(node1, node2) }

/**
* Holds if data can flow from `e1` to `e2` in zero or more
* local (intra-procedural) steps.
*/
predicate localExprFlow(Expr e1, Expr e2) { localFlow(exprNode(e1), exprNode(e2)) }

/**
* Holds if the `FieldRead` is not completely determined by explicit SSA
* updates.
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8 changes: 8 additions & 0 deletions java/ql/src/semmle/code/java/dataflow/internal/TaintTrackingUtil.qll
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Expand Up @@ -17,6 +17,14 @@ private import semmle.code.java.dataflow.internal.ContainerFlow
*/
predicate localTaint(DataFlow::Node src, DataFlow::Node sink) { localTaintStep*(src, sink) }

/**
* Holds if taint can flow from `src` to `sink` in zero or more
* local (intra-procedural) steps.
*/
predicate localExprTaint(Expr src, Expr sink) {
localTaint(DataFlow::exprNode(src), DataFlow::exprNode(sink))
}

/**
* Holds if taint can flow in one local step from `src` to `sink`.
*/
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