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