110 lines
2.9 KiB
Go
110 lines
2.9 KiB
Go
//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gosec
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import (
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"go/ast"
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"strings"
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)
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const vendorPath = "vendor/"
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type set map[string]bool
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// CallList is used to check for usage of specific packages
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// and functions.
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type CallList map[string]set
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// NewCallList creates a new empty CallList
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func NewCallList() CallList {
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return make(CallList)
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}
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// AddAll will add several calls to the call list at once
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func (c CallList) AddAll(selector string, idents ...string) {
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for _, ident := range idents {
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c.Add(selector, ident)
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}
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}
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// Add a selector and call to the call list
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func (c CallList) Add(selector, ident string) {
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if _, ok := c[selector]; !ok {
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c[selector] = make(set)
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}
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c[selector][ident] = true
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}
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// Contains returns true if the package and function are
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/// members of this call list.
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func (c CallList) Contains(selector, ident string) bool {
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if idents, ok := c[selector]; ok {
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_, found := idents[ident]
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return found
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}
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return false
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}
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// ContainsPointer returns true if a pointer to the selector type or the type
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// itself is a members of this call list.
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func (c CallList) ContainsPointer(selector, indent string) bool {
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if strings.HasPrefix(selector, "*") {
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if c.Contains(selector, indent) {
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return true
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}
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s := strings.TrimPrefix(selector, "*")
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return c.Contains(s, indent)
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}
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return false
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}
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// ContainsPkgCallExpr resolves the call expression name and type, and then further looks
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// up the package path for that type. Finally, it determines if the call exists within the call list
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func (c CallList) ContainsPkgCallExpr(n ast.Node, ctx *Context, stripVendor bool) *ast.CallExpr {
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selector, ident, err := GetCallInfo(n, ctx)
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if err != nil {
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return nil
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}
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// Use only explicit path (optionally strip vendor path prefix) to reduce conflicts
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path, ok := GetImportPath(selector, ctx)
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if !ok {
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return nil
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}
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if stripVendor {
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if vendorIdx := strings.Index(path, vendorPath); vendorIdx >= 0 {
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path = path[vendorIdx+len(vendorPath):]
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}
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}
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if !c.Contains(path, ident) {
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return nil
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}
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return n.(*ast.CallExpr)
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}
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// ContainsCallExpr resolves the call expression name and type, and then determines
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// if the call exists with the call list
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func (c CallList) ContainsCallExpr(n ast.Node, ctx *Context) *ast.CallExpr {
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selector, ident, err := GetCallInfo(n, ctx)
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if err != nil {
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return nil
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}
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if !c.Contains(selector, ident) && !c.ContainsPointer(selector, ident) {
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return nil
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}
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return n.(*ast.CallExpr)
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}
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