gopkg.in/alecthomas/gometalinter.v3@v3.0.0/_linters/src/github.com/securego/gosec/rules/big.go (about)

     1  // (c) Copyright 2016 Hewlett Packard Enterprise Development LP
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package rules
    16  
    17  import (
    18  	"go/ast"
    19  
    20  	"github.com/securego/gosec"
    21  )
    22  
    23  type usingBigExp struct {
    24  	gosec.MetaData
    25  	pkg   string
    26  	calls []string
    27  }
    28  
    29  func (r *usingBigExp) ID() string {
    30  	return r.MetaData.ID
    31  }
    32  
    33  func (r *usingBigExp) Match(n ast.Node, c *gosec.Context) (gi *gosec.Issue, err error) {
    34  	if _, matched := gosec.MatchCallByType(n, c, r.pkg, r.calls...); matched {
    35  		return gosec.NewIssue(c, n, r.ID(), r.What, r.Severity, r.Confidence), nil
    36  	}
    37  	return nil, nil
    38  }
    39  
    40  // NewUsingBigExp detects issues with modulus == 0 for Bignum
    41  func NewUsingBigExp(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
    42  	return &usingBigExp{
    43  		pkg:   "*math/big.Int",
    44  		calls: []string{"Exp"},
    45  		MetaData: gosec.MetaData{
    46  			ID:         id,
    47  			What:       "Use of math/big.Int.Exp function should be audited for modulus == 0",
    48  			Severity:   gosec.Low,
    49  			Confidence: gosec.High,
    50  		},
    51  	}, []ast.Node{(*ast.CallExpr)(nil)}
    52  }