78 lines
1.8 KiB
Go
78 lines
1.8 KiB
Go
// Copyright (C) 2016, 2023 Opsmate, Inc.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla
|
|
// Public License, v. 2.0. If a copy of the MPL was not distributed
|
|
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
//
|
|
// This software is distributed WITHOUT A WARRANTY OF ANY KIND.
|
|
// See the Mozilla Public License for details.
|
|
|
|
package monitor
|
|
|
|
import (
|
|
"bufio"
|
|
"encoding/hex"
|
|
"crypto/sha256"
|
|
"fmt"
|
|
"io"
|
|
"software.sslmate.com/src/certspotter"
|
|
"strings"
|
|
)
|
|
|
|
type KeyItem struct {
|
|
domain string
|
|
keyinfo string
|
|
}
|
|
|
|
type KeyList []KeyItem
|
|
|
|
func ParseKeyItem(str string) (KeyItem, error) {
|
|
fields := strings.Split(str, ";")
|
|
if len(fields) == 0 {
|
|
return KeyItem{}, fmt.Errorf("empty domain")
|
|
}
|
|
if len(fields) == 1 {
|
|
return KeyItem{}, fmt.Errorf("empty key info")
|
|
}
|
|
return KeyItem{
|
|
domain: fields[0],
|
|
keyinfo: fields[1],
|
|
}, nil
|
|
}
|
|
|
|
func ReadKeyList(reader io.Reader) (KeyList, error) {
|
|
items := make(KeyList, 0, 50)
|
|
scanner := bufio.NewScanner(reader)
|
|
lineNo := 0
|
|
for scanner.Scan() {
|
|
line := scanner.Text()
|
|
lineNo++
|
|
if line == "" || strings.HasPrefix(line, "#") {
|
|
continue
|
|
}
|
|
item, err := ParseKeyItem(line)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%w on line %d", err, lineNo)
|
|
}
|
|
items = append(items, item)
|
|
}
|
|
return items, scanner.Err()
|
|
}
|
|
|
|
func (item KeyItem) String() string {
|
|
return item.domain
|
|
}
|
|
|
|
func (list KeyList) Matches(certInfo *certspotter.CertInfo) (bool, KeyItem) {
|
|
|
|
for _, item := range list {
|
|
// better would be to convert the input and compare the bytes (no uppercase/lower-case issue)
|
|
pub := sha256.Sum256(certInfo.TBS.PublicKey.FullBytes)
|
|
sum := hex.EncodeToString(pub[:])
|
|
if sum == item.keyinfo {
|
|
return true, item
|
|
}
|
|
}
|
|
return false, KeyItem{}
|
|
}
|