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Make variable names more explicity and reduce duplications

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Change-Id: Ifa141b70351136cfe7d0756a83e8166a24b5d538
Signed-off-by: Cosmin Cojocar <ccojocar@google.com>
This commit is contained in:
Cosmin Cojocar 2024-08-30 17:17:14 +00:00 committed by Cosmin Cojocar
parent e0414c4640
commit ac67231ec5
1 changed files with 16 additions and 22 deletions
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38
analyzers/hardcodedNonce.go
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@ -78,26 +78,23 @@ func runHardCodedNonce(pass *analysis.Pass) (interface{}, error) {
func raiseIssue(val ssa.Value, funcsToTrack map[string][]int, ssaFuncs []*ssa.Function,
pass *analysis.Pass, issueDescription string,
) ([]*issue.Issue, error) {
var err error
var gosecIssue []*issue.Issue
if issueDescription == "" {
issueDescription = defaultIssueDescription
}
var err error
var gosecIssue []*issue.Issue
var issues []*issue.Issue
switch valType := (val).(type) {
case *ssa.Slice:
issueDescription += " by passing hardcoded slice/array"
tmp, hasErr := iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.High)
gosecIssue = append(gosecIssue, tmp...)
err = hasErr
issues, err = iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.High)
gosecIssue = append(gosecIssue, issues...)
case *ssa.UnOp:
// Check if it's a dereference operation (a.k.a pointer)
if valType.Op == token.MUL {
issueDescription += " by passing pointer which points to hardcoded variable"
tmp, hasErr := iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.Low)
gosecIssue = append(gosecIssue, tmp...)
err = hasErr
issues, err = iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.Low)
gosecIssue = append(gosecIssue, issues...)
}
// When the value assigned to a variable is a function call.
// It goes and check if this function contains call to crypto/rand.Read
@ -108,9 +105,8 @@ func raiseIssue(val ssa.Value, funcsToTrack map[string][]int, ssaFuncs []*ssa.Fu
if calledFunction, ok := callValue.(*ssa.Function); ok {
if contains, funcErr := isFuncContainsCryptoRand(calledFunction); !contains && funcErr == nil {
issueDescription += " by passing a value from function which doesn't use crypto/rand"
tmp, hasErr := iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.Medium)
gosecIssue = append(gosecIssue, tmp...)
err = hasErr
issues, err = iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.Medium)
gosecIssue = append(gosecIssue, issues...)
} else if funcErr != nil {
err = funcErr
}
@ -121,9 +117,8 @@ func raiseIssue(val ssa.Value, funcsToTrack map[string][]int, ssaFuncs []*ssa.Fu
case *ssa.Convert:
if valType.Type().String() == "[]byte" && valType.X.Type().String() == "string" {
issueDescription += " by passing converted string"
tmp, hasErr := iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.High)
gosecIssue = append(gosecIssue, tmp...)
err = hasErr
issues, err = iterateThroughReferrers(val, funcsToTrack, pass.Analyzer.Name, issueDescription, pass.Fset, issue.High)
gosecIssue = append(gosecIssue, issues...)
}
case *ssa.Parameter:
// arg given to tracked function is wrapped in another function, example:
@ -139,17 +134,16 @@ func raiseIssue(val ssa.Value, funcsToTrack map[string][]int, ssaFuncs []*ssa.Fu
trackedFunctions[valType.Parent().String()] = []int{len(valType.Parent().Params), index}
}
}
result := getArgsFromTrackedFunctions(ssaFuncs, trackedFunctions)
args := getArgsFromTrackedFunctions(ssaFuncs, trackedFunctions)
issueDescription += " by passing a parameter to a function and"
// recursively backtrack to where the origin of a variable passed to multiple functions is
for _, trackedVariable := range result {
if trackedVariable == nil {
for _, arg := range args {
if arg == nil {
continue
}
tmp, hasErr := raiseIssue(*trackedVariable, trackedFunctions, ssaFuncs, pass, issueDescription)
gosecIssue = append(gosecIssue, tmp...)
err = hasErr
issues, err = raiseIssue(*arg, trackedFunctions, ssaFuncs, pass, issueDescription)
gosecIssue = append(gosecIssue, issues...)
}
}
}