mirror of https://github.com/google/oss-fuzz.git
95 lines
1.8 KiB
Go
95 lines
1.8 KiB
Go
// Copyright 2022 Google LLC
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//
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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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//
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package aes
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import (
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"crypto/aes"
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"runtime"
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"strings"
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)
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func catchPanics() {
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if r := recover(); r != nil {
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var err string
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switch r.(type) {
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case string:
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err = r.(string)
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case runtime.Error:
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err = r.(runtime.Error).Error()
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case error:
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err = r.(error).Error()
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}
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if strings.Contains(err, "not full block") {
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return
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} else if strings.Contains(err, "invalid buffer overlap") {
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return
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} else {
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panic(err)
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}
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}
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}
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func FuzzAesCipherDecrypt(data []byte) int {
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if len(data) < 5 {
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return 0
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}
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keyIndex := int(data[0])
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lenIn := int(data[1])
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if lenIn < aes.BlockSize {
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return 0
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}
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data = data[2:]
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if (keyIndex + 5) > len(data) {
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return 0
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}
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key := data[:keyIndex]
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c, err := aes.NewCipher(key)
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if err != nil {
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return 0
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}
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dst := make([]byte, lenIn)
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src := data[keyIndex+1:]
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defer catchPanics()
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c.Decrypt(dst, src)
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return 1
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}
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func FuzzAesCipherEncrypt(data []byte) int {
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if len(data) < 5 {
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return 0
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}
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keyIndex := int(data[0])
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lenIn := int(data[1])
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data = data[2:]
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if (keyIndex + 5) > len(data) {
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return 0
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}
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key := data[:keyIndex]
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c, err := aes.NewCipher(key)
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if err != nil {
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return 0
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}
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dst := make([]byte, lenIn)
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src := data[keyIndex+1:]
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defer catchPanics()
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c.Encrypt(dst, src)
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return 1
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}
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