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Code Issues Releases Wiki Activity

feat($user): 用户登录增加图形验证码

pull/21/merge
ouqiang 2017-09-02 11:43:33 +08:00
parent 337ee35357
commit 2b1c7f16cf
17 changed files with 2079 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
modules/utils/json.go
View File

@ -20,6 +20,7 @@ const ResponseFailure = 1
const NotFound = 2 const NotFound = 2
const AuthError = 3 const AuthError = 3
const ServerError = 4 const ServerError = 4
const CaptchaError = 5
const SuccessContent = "操作成功" const SuccessContent = "操作成功"
const FailureContent = "操作失败" const FailureContent = "操作失败"

9
public/resource/javascript/main.js
View File

@ -10,13 +10,16 @@ function Util() {
swal("操作成功", '保存成功', 'success'); swal("操作成功", '保存成功', 'success');
}; };
// ajax成功处理 // ajax成功处理
util.ajaxSuccess = function(response, callback) { util.ajaxSuccess = function(response, callback, failureCallback) {
if (response.code === undefined) { if (response.code === undefined) {
swal(FAILURE_MESSAGE, '服务端返回值无法解析', 'error'); swal(FAILURE_MESSAGE, '服务端返回值无法解析', 'error');
return; return;
} }
if (response.code != SUCCESS) { if (response.code != SUCCESS) {
swal(FAILURE_MESSAGE, response.message ,'error'); swal(FAILURE_MESSAGE, response.message ,'error');
if (failureCallback !== undefined) {
failureCallback(response.code, response.message);
}
return; return;
} }
if (callback !== undefined) { if (callback !== undefined) {
@ -39,12 +42,12 @@ function Util() {
).error(util.ajaxFailure); ).error(util.ajaxFailure);
}; };
// post请求 // post请求
util.post = function(url, params, callback) { util.post = function(url, params, callback, failureCallback) {
$.post( $.post(
url, url,
util.objectTrim(params), util.objectTrim(params),
function(response) { function(response) {
util.ajaxSuccess(response, callback); util.ajaxSuccess(response, callback, failureCallback);
}, },
'json' 'json'
).error(util.ajaxFailure); ).error(util.ajaxFailure);

4
routers/routers.go
View File

@ -20,6 +20,8 @@ import (
"time" "time"
"strconv" "strconv"
"html/template" "html/template"
"github.com/go-macaron/cache"
"github.com/go-macaron/captcha"
) )
// 静态文件目录 // 静态文件目录
@ -148,6 +150,8 @@ func RegisterMiddleware(m *macaron.Macaron) {
}, },
}}, }},
})) }))
m.Use(cache.Cacher())
m.Use(captcha.Captchaer())
m.Use(session.Sessioner(session.Options{ m.Use(session.Sessioner(session.Options{
Provider: "file", Provider: "file",
ProviderConfig: app.DataDir + "/sessions", ProviderConfig: app.DataDir + "/sessions",

6
routers/user/user.go
View File

@ -6,6 +6,7 @@ import (
"github.com/ouqiang/gocron/models" "github.com/ouqiang/gocron/models"
"github.com/go-macaron/session" "github.com/go-macaron/session"
"github.com/ouqiang/gocron/modules/logger" "github.com/ouqiang/gocron/modules/logger"
"github.com/go-macaron/captcha"
) )
// @author qiang.ou<qingqianludao@gmail.com> // @author qiang.ou<qingqianludao@gmail.com>
@ -47,7 +48,7 @@ func UpdatePassword(ctx *macaron.Context, sess session.Store) string {
return json.Success("修改成功", nil) return json.Success("修改成功", nil)
} }
func ValidateLogin(ctx *macaron.Context, sess session.Store) string { func ValidateLogin(ctx *macaron.Context, sess session.Store, cpt *captcha.Captcha) string {
username := ctx.QueryTrim("username") username := ctx.QueryTrim("username")
password := ctx.QueryTrim("password") password := ctx.QueryTrim("password")
json := utils.JsonResponse{} json := utils.JsonResponse{}
@ -58,6 +59,9 @@ func ValidateLogin(ctx *macaron.Context, sess session.Store) string {
if !userModel.Match(username, password) { if !userModel.Match(username, password) {
return json.CommonFailure("用户名或密码错误") return json.CommonFailure("用户名或密码错误")
} }
if !cpt.VerifyReq(ctx.Req) {
return json.Failure(utils.CaptchaError, "验证码错误")
}
loginLogModel := new(models.LoginLog) loginLogModel := new(models.LoginLog)
loginLogModel.Username = userModel.Name loginLogModel.Username = userModel.Name

19
templates/user/login.html
View File

@ -13,6 +13,12 @@
<input type="password" name="password" placeholder="密码"> <input type="password" name="password" placeholder="密码">
</div> </div>
</div> </div>
<div class="two fields">
<div class="field">
{{{.Captcha.CreateHtml}}}
<input type="text" name="captcha" placeholder="验证码">
</div>
</div>
<button class="ui button primary button" >登录</button> <button class="ui button primary button" >登录</button>
</form> </form>
</div> </div>
@ -25,6 +31,10 @@
onSuccess: function(event, fields) { onSuccess: function(event, fields) {
util.post('/user/login', fields, function(code, message) { util.post('/user/login', fields, function(code, message) {
location.href = "/" location.href = "/"
}, function (code, message) {
if (code == 5) {
$('.captcha-img').trigger('click');
}
}); });
return false; return false;
@ -47,6 +57,15 @@
prompt : '请输入密码' prompt : '请输入密码'
} }
] ]
},
Captcha: {
identifier : 'captcha',
rules: [
{
type : 'empty',
prompt : '请输入验证码'
}
]
} }
}, },
inline : true inline : true

191
vendor/github.com/go-macaron/cache/LICENSE generated vendored Normal file
View File

@ -0,0 +1,191 @@
Apache License
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20
vendor/github.com/go-macaron/cache/README.md generated vendored Normal file
View File

@ -0,0 +1,20 @@
# cache [![Build Status](https://travis-ci.org/go-macaron/cache.svg?branch=master)](https://travis-ci.org/go-macaron/cache) [![](http://gocover.io/_badge/github.com/go-macaron/cache)](http://gocover.io/github.com/go-macaron/cache)
Middleware cache provides cache management for [Macaron](https://github.com/go-macaron/macaron). It can use many cache adapters, including memory, file, Redis, Memcache, PostgreSQL, MySQL, Ledis and Nodb.
### Installation
go get github.com/go-macaron/cache
## Getting Help
- [API Reference](https://gowalker.org/github.com/go-macaron/cache)
- [Documentation](http://go-macaron.com/docs/middlewares/cache)
## Credits
This package is a modified version of [beego/cache](https://github.com/astaxie/beego/tree/master/cache).
## License
This project is under the Apache License, Version 2.0. See the [LICENSE](LICENSE) file for the full license text.

122
vendor/github.com/go-macaron/cache/cache.go generated vendored Normal file
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@ -0,0 +1,122 @@
// Copyright 2013 Beego Authors
// Copyright 2014 The Macaron Authors
//
// 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 cache is a middleware that provides the cache management of Macaron.
package cache
import (
"fmt"
"gopkg.in/macaron.v1"
)
const _VERSION = "0.3.0"
func Version() string {
return _VERSION
}
// Cache is the interface that operates the cache data.
type Cache interface {
// Put puts value into cache with key and expire time.
Put(key string, val interface{}, timeout int64) error
// Get gets cached value by given key.
Get(key string) interface{}
// Delete deletes cached value by given key.
Delete(key string) error
// Incr increases cached int-type value by given key as a counter.
Incr(key string) error
// Decr decreases cached int-type value by given key as a counter.
Decr(key string) error
// IsExist returns true if cached value exists.
IsExist(key string) bool
// Flush deletes all cached data.
Flush() error
// StartAndGC starts GC routine based on config string settings.
StartAndGC(opt Options) error
}
// Options represents a struct for specifying configuration options for the cache middleware.
type Options struct {
// Name of adapter. Default is "memory".
Adapter string
// Adapter configuration, it's corresponding to adapter.
AdapterConfig string
// GC interval time in seconds. Default is 60.
Interval int
// Occupy entire database. Default is false.
OccupyMode bool
// Configuration section name. Default is "cache".
Section string
}
func prepareOptions(options []Options) Options {
var opt Options
if len(options) > 0 {
opt = options[0]
}
if len(opt.Section) == 0 {
opt.Section = "cache"
}
sec := macaron.Config().Section(opt.Section)
if len(opt.Adapter) == 0 {
opt.Adapter = sec.Key("ADAPTER").MustString("memory")
}
if opt.Interval == 0 {
opt.Interval = sec.Key("INTERVAL").MustInt(60)
}
if len(opt.AdapterConfig) == 0 {
opt.AdapterConfig = sec.Key("ADAPTER_CONFIG").MustString("data/caches")
}
return opt
}
// NewCacher creates and returns a new cacher by given adapter name and configuration.
// It panics when given adapter isn't registered and starts GC automatically.
func NewCacher(name string, opt Options) (Cache, error) {
adapter, ok := adapters[name]
if !ok {
return nil, fmt.Errorf("cache: unknown adapter '%s'(forgot to import?)", name)
}
return adapter, adapter.StartAndGC(opt)
}
// Cacher is a middleware that maps a cache.Cache service into the Macaron handler chain.
// An single variadic cache.Options struct can be optionally provided to configure.
func Cacher(options ...Options) macaron.Handler {
opt := prepareOptions(options)
cache, err := NewCacher(opt.Adapter, opt)
if err != nil {
panic(err)
}
return func(ctx *macaron.Context) {
ctx.Map(cache)
}
}
var adapters = make(map[string]Cache)
// Register registers a adapter.
func Register(name string, adapter Cache) {
if adapter == nil {
panic("cache: cannot register adapter with nil value")
}
if _, dup := adapters[name]; dup {
panic(fmt.Errorf("cache: cannot register adapter '%s' twice", name))
}
adapters[name] = adapter
}

208
vendor/github.com/go-macaron/cache/file.go generated vendored Normal file
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@ -0,0 +1,208 @@
// Copyright 2013 Beego Authors
// Copyright 2014 The Macaron Authors
//
// 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 cache
import (
"crypto/md5"
"encoding/hex"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"sync"
"time"
"github.com/Unknwon/com"
"gopkg.in/macaron.v1"
)
// Item represents a cache item.
type Item struct {
Val interface{}
Created int64
Expire int64
}
func (item *Item) hasExpired() bool {
return item.Expire > 0 &&
(time.Now().Unix()-item.Created) >= item.Expire
}
// FileCacher represents a file cache adapter implementation.
type FileCacher struct {
lock sync.Mutex
rootPath string
interval int // GC interval.
}
// NewFileCacher creates and returns a new file cacher.
func NewFileCacher() *FileCacher {
return &FileCacher{}
}
func (c *FileCacher) filepath(key string) string {
m := md5.Sum([]byte(key))
hash := hex.EncodeToString(m[:])
return filepath.Join(c.rootPath, string(hash[0]), string(hash[1]), hash)
}
// Put puts value into cache with key and expire time.
// If expired is 0, it will be deleted by next GC operation.
func (c *FileCacher) Put(key string, val interface{}, expire int64) error {
filename := c.filepath(key)
item := &Item{val, time.Now().Unix(), expire}
data, err := EncodeGob(item)
if err != nil {
return err
}
os.MkdirAll(filepath.Dir(filename), os.ModePerm)
return ioutil.WriteFile(filename, data, os.ModePerm)
}
func (c *FileCacher) read(key string) (*Item, error) {
filename := c.filepath(key)
data, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
item := new(Item)
return item, DecodeGob(data, item)
}
// Get gets cached value by given key.
func (c *FileCacher) Get(key string) interface{} {
item, err := c.read(key)
if err != nil {
return nil
}
if item.hasExpired() {
os.Remove(c.filepath(key))
return nil
}
return item.Val
}
// Delete deletes cached value by given key.
func (c *FileCacher) Delete(key string) error {
return os.Remove(c.filepath(key))
}
// Incr increases cached int-type value by given key as a counter.
func (c *FileCacher) Incr(key string) error {
item, err := c.read(key)
if err != nil {
return err
}
item.Val, err = Incr(item.Val)
if err != nil {
return err
}
return c.Put(key, item.Val, item.Expire)
}
// Decrease cached int value.
func (c *FileCacher) Decr(key string) error {
item, err := c.read(key)
if err != nil {
return err
}
item.Val, err = Decr(item.Val)
if err != nil {
return err
}
return c.Put(key, item.Val, item.Expire)
}
// IsExist returns true if cached value exists.
func (c *FileCacher) IsExist(key string) bool {
return com.IsExist(c.filepath(key))
}
// Flush deletes all cached data.
func (c *FileCacher) Flush() error {
return os.RemoveAll(c.rootPath)
}
func (c *FileCacher) startGC() {
c.lock.Lock()
defer c.lock.Unlock()
if c.interval < 1 {
return
}
if err := filepath.Walk(c.rootPath, func(path string, fi os.FileInfo, err error) error {
if err != nil {
return fmt.Errorf("Walk: %v", err)
}
if fi.IsDir() {
return nil
}
data, err := ioutil.ReadFile(path)
if err != nil && !os.IsNotExist(err) {
fmt.Errorf("ReadFile: %v", err)
}
item := new(Item)
if err = DecodeGob(data, item); err != nil {
return err
}
if item.hasExpired() {
if err = os.Remove(path); err != nil && !os.IsNotExist(err) {
return fmt.Errorf("Remove: %v", err)
}
}
return nil
}); err != nil {
log.Printf("error garbage collecting cache files: %v", err)
}
time.AfterFunc(time.Duration(c.interval)*time.Second, func() { c.startGC() })
}
// StartAndGC starts GC routine based on config string settings.
func (c *FileCacher) StartAndGC(opt Options) error {
c.lock.Lock()
c.rootPath = opt.AdapterConfig
c.interval = opt.Interval
if !filepath.IsAbs(c.rootPath) {
c.rootPath = filepath.Join(macaron.Root, c.rootPath)
}
c.lock.Unlock()
if err := os.MkdirAll(c.rootPath, os.ModePerm); err != nil {
return err
}
go c.startGC()
return nil
}
func init() {
Register("file", NewFileCacher())
}

179
vendor/github.com/go-macaron/cache/memory.go generated vendored Normal file
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@ -0,0 +1,179 @@
// Copyright 2013 Beego Authors
// Copyright 2014 The Macaron Authors
//
// 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 cache
import (
"errors"
"sync"
"time"
)
// MemoryItem represents a memory cache item.
type MemoryItem struct {
val interface{}
created int64
expire int64
}
func (item *MemoryItem) hasExpired() bool {
return item.expire > 0 &&
(time.Now().Unix()-item.created) >= item.expire
}
// MemoryCacher represents a memory cache adapter implementation.
type MemoryCacher struct {
lock sync.RWMutex
items map[string]*MemoryItem
interval int // GC interval.
}
// NewMemoryCacher creates and returns a new memory cacher.
func NewMemoryCacher() *MemoryCacher {
return &MemoryCacher{items: make(map[string]*MemoryItem)}
}
// Put puts value into cache with key and expire time.
// If expired is 0, it will be deleted by next GC operation.
func (c *MemoryCacher) Put(key string, val interface{}, expire int64) error {
c.lock.Lock()
defer c.lock.Unlock()
c.items[key] = &MemoryItem{
val: val,
created: time.Now().Unix(),
expire: expire,
}
return nil
}
// Get gets cached value by given key.
func (c *MemoryCacher) Get(key string) interface{} {
c.lock.RLock()
defer c.lock.RUnlock()
item, ok := c.items[key]
if !ok {
return nil
}
if item.hasExpired() {
go c.Delete(key)
return nil
}
return item.val
}
// Delete deletes cached value by given key.
func (c *MemoryCacher) Delete(key string) error {
c.lock.Lock()
defer c.lock.Unlock()
delete(c.items, key)
return nil
}
// Incr increases cached int-type value by given key as a counter.
func (c *MemoryCacher) Incr(key string) (err error) {
c.lock.RLock()
defer c.lock.RUnlock()
item, ok := c.items[key]
if !ok {
return errors.New("key not exist")
}
item.val, err = Incr(item.val)
return err
}
// Decr decreases cached int-type value by given key as a counter.
func (c *MemoryCacher) Decr(key string) (err error) {
c.lock.RLock()
defer c.lock.RUnlock()
item, ok := c.items[key]
if !ok {
return errors.New("key not exist")
}
item.val, err = Decr(item.val)
return err
}
// IsExist returns true if cached value exists.
func (c *MemoryCacher) IsExist(key string) bool {
c.lock.RLock()
defer c.lock.RUnlock()
_, ok := c.items[key]
return ok
}
// Flush deletes all cached data.
func (c *MemoryCacher) Flush() error {
c.lock.Lock()
defer c.lock.Unlock()
c.items = make(map[string]*MemoryItem)
return nil
}
func (c *MemoryCacher) checkRawExpiration(key string) {
item, ok := c.items[key]
if !ok {
return
}
if item.hasExpired() {
delete(c.items, key)
}
}
func (c *MemoryCacher) checkExpiration(key string) {
c.lock.Lock()
defer c.lock.Unlock()
c.checkRawExpiration(key)
}
func (c *MemoryCacher) startGC() {
c.lock.Lock()
defer c.lock.Unlock()
if c.interval < 1 {
return
}
if c.items != nil {
for key, _ := range c.items {
c.checkRawExpiration(key)
}
}
time.AfterFunc(time.Duration(c.interval)*time.Second, func() { c.startGC() })
}
// StartAndGC starts GC routine based on config string settings.
func (c *MemoryCacher) StartAndGC(opt Options) error {
c.lock.Lock()
c.interval = opt.Interval
c.lock.Unlock()
go c.startGC()
return nil
}
func init() {
Register("memory", NewMemoryCacher())
}

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// Copyright 2014 The Macaron Authors
//
// 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 cache
import (
"bytes"
"encoding/gob"
"errors"
)
func EncodeGob(item *Item) ([]byte, error) {
buf := bytes.NewBuffer(nil)
err := gob.NewEncoder(buf).Encode(item)
return buf.Bytes(), err
}
func DecodeGob(data []byte, out *Item) error {
buf := bytes.NewBuffer(data)
return gob.NewDecoder(buf).Decode(&out)
}
func Incr(val interface{}) (interface{}, error) {
switch val.(type) {
case int:
val = val.(int) + 1
case int32:
val = val.(int32) + 1
case int64:
val = val.(int64) + 1
case uint:
val = val.(uint) + 1
case uint32:
val = val.(uint32) + 1
case uint64:
val = val.(uint64) + 1
default:
return val, errors.New("item value is not int-type")
}
return val, nil
}
func Decr(val interface{}) (interface{}, error) {
switch val.(type) {
case int:
val = val.(int) - 1
case int32:
val = val.(int32) - 1
case int64:
val = val.(int64) - 1
case uint:
if val.(uint) > 0 {
val = val.(uint) - 1
} else {
return val, errors.New("item value is less than 0")
}
case uint32:
if val.(uint32) > 0 {
val = val.(uint32) - 1
} else {
return val, errors.New("item value is less than 0")
}
case uint64:
if val.(uint64) > 0 {
val = val.(uint64) - 1
} else {
return val, errors.New("item value is less than 0")
}
default:
return val, errors.New("item value is not int-type")
}
return val, nil
}

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Apache License
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# captcha [![Build Status](https://travis-ci.org/go-macaron/captcha.svg?branch=master)](https://travis-ci.org/go-macaron/captcha)
Middleware captcha provides captcha service for [Macaron](https://github.com/go-macaron/macaron).
### Installation
go get github.com/go-macaron/captcha
## Getting Help
- [API Reference](https://gowalker.org/github.com/go-macaron/captcha)
- [Documentation](http://go-macaron.com/docs/middlewares/captcha)
## License
This project is under the Apache License, Version 2.0. See the [LICENSE](LICENSE) file for the full license text.

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// Copyright 2013 Beego Authors
// Copyright 2014 The Macaron Authors
//
// 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 captcha a middleware that provides captcha service for Macaron.
package captcha
import (
"fmt"
"html/template"
"path"
"strings"
"github.com/Unknwon/com"
"github.com/go-macaron/cache"
"gopkg.in/macaron.v1"
)
const _VERSION = "0.1.0"
func Version() string {
return _VERSION
}
var (
defaultChars = []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
)
// Captcha represents a captcha service.
type Captcha struct {
store cache.Cache
SubURL string
URLPrefix string
FieldIdName string
FieldCaptchaName string
StdWidth int
StdHeight int
ChallengeNums int
Expiration int64
CachePrefix string
}
// generate key string
func (c *Captcha) key(id string) string {
return c.CachePrefix + id
}
// generate rand chars with default chars
func (c *Captcha) genRandChars() string {
return string(com.RandomCreateBytes(c.ChallengeNums, defaultChars...))
}
// CreateHTML outputs HTML for display and fetch new captcha images.
func (c *Captcha) CreateHTML() template.HTML {
value, err := c.CreateCaptcha()
if err != nil {
panic(fmt.Errorf("fail to create captcha: %v", err))
}
return template.HTML(fmt.Sprintf(`<input type="hidden" name="%[1]s" value="%[2]s">
<a class="captcha" href="javascript:" tabindex="-1">
<img onclick="this.src=('%[3]s%[4]s%[2]s.png?reload='+(new Date()).getTime())" class="captcha-img" src="%[3]s%[4]s%[2]s.png">
</a>`, c.FieldIdName, value, c.SubURL, c.URLPrefix))
}
// DEPRECATED
func (c *Captcha) CreateHtml() template.HTML {
return c.CreateHTML()
}
// create a new captcha id
func (c *Captcha) CreateCaptcha() (string, error) {
id := string(com.RandomCreateBytes(15))
if err := c.store.Put(c.key(id), c.genRandChars(), c.Expiration); err != nil {
return "", err
}
return id, nil
}
// verify from a request
func (c *Captcha) VerifyReq(req macaron.Request) bool {
req.ParseForm()
return c.Verify(req.Form.Get(c.FieldIdName), req.Form.Get(c.FieldCaptchaName))
}
// direct verify id and challenge string
func (c *Captcha) Verify(id string, challenge string) bool {
if len(challenge) == 0 || len(id) == 0 {
return false
}
var chars string
key := c.key(id)
if v, ok := c.store.Get(key).(string); ok {
chars = v
} else {
return false
}
defer c.store.Delete(key)
if len(chars) != len(challenge) {
return false
}
// verify challenge
for i, c := range []byte(chars) {
if c != challenge[i]-48 {
return false
}
}
return true
}
type Options struct {
// Suburl path. Default is empty.
SubURL string
// URL prefix of getting captcha pictures. Default is "/captcha/".
URLPrefix string
// Hidden input element ID. Default is "captcha_id".
FieldIdName string
// User input value element name in request form. Default is "captcha".
FieldCaptchaName string
// Challenge number. Default is 6.
ChallengeNums int
// Captcha image width. Default is 240.
Width int
// Captcha image height. Default is 80.
Height int
// Captcha expiration time in seconds. Default is 600.
Expiration int64
// Cache key prefix captcha characters. Default is "captcha_".
CachePrefix string
}
func prepareOptions(options []Options) Options {
var opt Options
if len(options) > 0 {
opt = options[0]
}
opt.SubURL = strings.TrimSuffix(opt.SubURL, "/")
// Defaults.
if len(opt.URLPrefix) == 0 {
opt.URLPrefix = "/captcha/"
} else if opt.URLPrefix[len(opt.URLPrefix)-1] != '/' {
opt.URLPrefix += "/"
}
if len(opt.FieldIdName) == 0 {
opt.FieldIdName = "captcha_id"
}
if len(opt.FieldCaptchaName) == 0 {
opt.FieldCaptchaName = "captcha"
}
if opt.ChallengeNums == 0 {
opt.ChallengeNums = 6
}
if opt.Width == 0 {
opt.Width = stdWidth
}
if opt.Height == 0 {
opt.Height = stdHeight
}
if opt.Expiration == 0 {
opt.Expiration = 600
}
if len(opt.CachePrefix) == 0 {
opt.CachePrefix = "captcha_"
}
return opt
}
// NewCaptcha initializes and returns a captcha with given options.
func NewCaptcha(opt Options) *Captcha {
return &Captcha{
SubURL: opt.SubURL,
URLPrefix: opt.URLPrefix,
FieldIdName: opt.FieldIdName,
FieldCaptchaName: opt.FieldCaptchaName,
StdWidth: opt.Width,
StdHeight: opt.Height,
ChallengeNums: opt.ChallengeNums,
Expiration: opt.Expiration,
CachePrefix: opt.CachePrefix,
}
}
// Captchaer is a middleware that maps a captcha.Captcha service into the Macaron handler chain.
// An single variadic captcha.Options struct can be optionally provided to configure.
// This should be register after cache.Cacher.
func Captchaer(options ...Options) macaron.Handler {
return func(ctx *macaron.Context, cache cache.Cache) {
cpt := NewCaptcha(prepareOptions(options))
cpt.store = cache
if strings.HasPrefix(ctx.Req.URL.Path, cpt.URLPrefix) {
var chars string
id := path.Base(ctx.Req.URL.Path)
if i := strings.Index(id, "."); i > -1 {
id = id[:i]
}
key := cpt.key(id)
// Reload captcha.
if len(ctx.Query("reload")) > 0 {
chars = cpt.genRandChars()
if err := cpt.store.Put(key, chars, cpt.Expiration); err != nil {
ctx.Status(500)
ctx.Write([]byte("captcha reload error"))
panic(fmt.Errorf("reload captcha: %v", err))
}
} else {
if v, ok := cpt.store.Get(key).(string); ok {
chars = v
} else {
ctx.Status(404)
ctx.Write([]byte("captcha not found"))
return
}
}
if _, err := NewImage([]byte(chars), cpt.StdWidth, cpt.StdHeight).WriteTo(ctx.Resp); err != nil {
panic(fmt.Errorf("write captcha: %v", err))
}
return
}
ctx.Data["Captcha"] = cpt
ctx.Map(cpt)
}
}

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// Copyright 2013 Beego Authors
//
// 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 captcha
import (
"bytes"
"image"
"image/color"
"image/png"
"io"
"math"
)
const (
fontWidth = 11
fontHeight = 18
blackChar = 1
// Standard width and height of a captcha image.
stdWidth = 240
stdHeight = 80
// Maximum absolute skew factor of a single digit.
maxSkew = 0.7
// Number of background circles.
circleCount = 20
)
var font = [][]byte{
{ // 0
0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0,
0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0,
0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0,
1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1,
0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0,
0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0,
0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0,
},
{ // 1
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0,
0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0,
0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0,
0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0,
0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
},
{ // 2
0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,
1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0,
0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0,
0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0,
0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
},
{ // 3
0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,
1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0,
0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0,
0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0,
},
{ // 4
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0,
0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0,
0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0,
0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0,
0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0,
0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0,
0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0,
0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0,
0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0,
1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0,
1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
},
{ // 5
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0,
},
{ // 6
0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0,
0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0,
0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0,
1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0,
1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0,
1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1,
0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0,
0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0,
},
{ // 7
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0,
0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0,
0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0,
},
{ // 8
0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0,
0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0,
0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1,
0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0,
0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0,
0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0,
0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0,
1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0,
},
{ // 9
0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0,
1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1,
1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1,
0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1,
0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1,
0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0,
0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0,
0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
},
}
type Image struct {
*image.Paletted
numWidth int
numHeight int
dotSize int
}
var prng = &siprng{}
// randIntn returns a pseudorandom non-negative int in range [0, n).
func randIntn(n int) int {
return prng.Intn(n)
}
// randInt returns a pseudorandom int in range [from, to].
func randInt(from, to int) int {
return prng.Intn(to+1-from) + from
}
// randFloat returns a pseudorandom float64 in range [from, to].
func randFloat(from, to float64) float64 {
return (to-from)*prng.Float64() + from
}
func randomPalette() color.Palette {
p := make([]color.Color, circleCount+1)
// Transparent color.
p[0] = color.RGBA{0xFF, 0xFF, 0xFF, 0x00}
// Primary color.
prim := color.RGBA{
uint8(randIntn(129)),
uint8(randIntn(129)),
uint8(randIntn(129)),
0xFF,
}
p[1] = prim
// Circle colors.
for i := 2; i <= circleCount; i++ {
p[i] = randomBrightness(prim, 255)
}
return p
}
// NewImage returns a new captcha image of the given width and height with the
// given digits, where each digit must be in range 0-9.
func NewImage(digits []byte, width, height int) *Image {
m := new(Image)
m.Paletted = image.NewPaletted(image.Rect(0, 0, width, height), randomPalette())
m.calculateSizes(width, height, len(digits))
// Randomly position captcha inside the image.
maxx := width - (m.numWidth+m.dotSize)*len(digits) - m.dotSize
maxy := height - m.numHeight - m.dotSize*2
var border int
if width > height {
border = height / 5
} else {
border = width / 5
}
x := randInt(border, maxx-border)
y := randInt(border, maxy-border)
// Draw digits.
for _, n := range digits {
m.drawDigit(font[n], x, y)
x += m.numWidth + m.dotSize
}
// Draw strike-through line.
m.strikeThrough()
// Apply wave distortion.
m.distort(randFloat(5, 10), randFloat(100, 200))
// Fill image with random circles.
m.fillWithCircles(circleCount, m.dotSize)
return m
}
// encodedPNG encodes an image to PNG and returns
// the result as a byte slice.
func (m *Image) encodedPNG() []byte {
var buf bytes.Buffer
if err := png.Encode(&buf, m.Paletted); err != nil {
panic(err.Error())
}
return buf.Bytes()
}
// WriteTo writes captcha image in PNG format into the given writer.
func (m *Image) WriteTo(w io.Writer) (int64, error) {
n, err := w.Write(m.encodedPNG())
return int64(n), err
}
func (m *Image) calculateSizes(width, height, ncount int) {
// Goal: fit all digits inside the image.
var border int
if width > height {
border = height / 4
} else {
border = width / 4
}
// Convert everything to floats for calculations.
w := float64(width - border*2)
h := float64(height - border*2)
// fw takes into account 1-dot spacing between digits.
fw := float64(fontWidth + 1)
fh := float64(fontHeight)
nc := float64(ncount)
// Calculate the width of a single digit taking into account only the
// width of the image.
nw := w / nc
// Calculate the height of a digit from this width.
nh := nw * fh / fw
// Digit too high?
if nh > h {
// Fit digits based on height.
nh = h
nw = fw / fh * nh
}
// Calculate dot size.
m.dotSize = int(nh / fh)
// Save everything, making the actual width smaller by 1 dot to account
// for spacing between digits.
m.numWidth = int(nw) - m.dotSize
m.numHeight = int(nh)
}
func (m *Image) drawHorizLine(fromX, toX, y int, colorIdx uint8) {
for x := fromX; x <= toX; x++ {
m.SetColorIndex(x, y, colorIdx)
}
}
func (m *Image) drawCircle(x, y, radius int, colorIdx uint8) {
f := 1 - radius
dfx := 1
dfy := -2 * radius
xo := 0
yo := radius
m.SetColorIndex(x, y+radius, colorIdx)
m.SetColorIndex(x, y-radius, colorIdx)
m.drawHorizLine(x-radius, x+radius, y, colorIdx)
for xo < yo {
if f >= 0 {
yo--
dfy += 2
f += dfy
}
xo++
dfx += 2
f += dfx
m.drawHorizLine(x-xo, x+xo, y+yo, colorIdx)
m.drawHorizLine(x-xo, x+xo, y-yo, colorIdx)
m.drawHorizLine(x-yo, x+yo, y+xo, colorIdx)
m.drawHorizLine(x-yo, x+yo, y-xo, colorIdx)
}
}
func (m *Image) fillWithCircles(n, maxradius int) {
maxx := m.Bounds().Max.X
maxy := m.Bounds().Max.Y
for i := 0; i < n; i++ {
colorIdx := uint8(randInt(1, circleCount-1))
r := randInt(1, maxradius)
m.drawCircle(randInt(r, maxx-r), randInt(r, maxy-r), r, colorIdx)
}
}
func (m *Image) strikeThrough() {
maxx := m.Bounds().Max.X
maxy := m.Bounds().Max.Y
y := randInt(maxy/3, maxy-maxy/3)
amplitude := randFloat(5, 20)
period := randFloat(80, 180)
dx := 2.0 * math.Pi / period
for x := 0; x < maxx; x++ {
xo := amplitude * math.Cos(float64(y)*dx)
yo := amplitude * math.Sin(float64(x)*dx)
for yn := 0; yn < m.dotSize; yn++ {
r := randInt(0, m.dotSize)
m.drawCircle(x+int(xo), y+int(yo)+(yn*m.dotSize), r/2, 1)
}
}
}
func (m *Image) drawDigit(digit []byte, x, y int) {
skf := randFloat(-maxSkew, maxSkew)
xs := float64(x)
r := m.dotSize / 2
y += randInt(-r, r)
for yo := 0; yo < fontHeight; yo++ {
for xo := 0; xo < fontWidth; xo++ {
if digit[yo*fontWidth+xo] != blackChar {
continue
}
m.drawCircle(x+xo*m.dotSize, y+yo*m.dotSize, r, 1)
}
xs += skf
x = int(xs)
}
}
func (m *Image) distort(amplude float64, period float64) {
w := m.Bounds().Max.X
h := m.Bounds().Max.Y
oldm := m.Paletted
newm := image.NewPaletted(image.Rect(0, 0, w, h), oldm.Palette)
dx := 2.0 * math.Pi / period
for x := 0; x < w; x++ {
for y := 0; y < h; y++ {
xo := amplude * math.Sin(float64(y)*dx)
yo := amplude * math.Cos(float64(x)*dx)
newm.SetColorIndex(x, y, oldm.ColorIndexAt(x+int(xo), y+int(yo)))
}
}
m.Paletted = newm
}
func randomBrightness(c color.RGBA, max uint8) color.RGBA {
minc := min3(c.R, c.G, c.B)
maxc := max3(c.R, c.G, c.B)
if maxc > max {
return c
}
n := randIntn(int(max-maxc)) - int(minc)
return color.RGBA{
uint8(int(c.R) + n),
uint8(int(c.G) + n),
uint8(int(c.B) + n),
uint8(c.A),
}
}
func min3(x, y, z uint8) (m uint8) {
m = x
if y < m {
m = y
}
if z < m {
m = z
}
return
}
func max3(x, y, z uint8) (m uint8) {
m = x
if y > m {
m = y
}
if z > m {
m = z
}
return
}

277
vendor/github.com/go-macaron/captcha/siprng.go generated vendored Normal file
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@ -0,0 +1,277 @@
// Copyright 2013 Beego Authors
//
// 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 captcha
import (
"crypto/rand"
"encoding/binary"
"io"
"sync"
)
// siprng is PRNG based on SipHash-2-4.
type siprng struct {
mu sync.Mutex
k0, k1, ctr uint64
}
// siphash implements SipHash-2-4, accepting a uint64 as a message.
func siphash(k0, k1, m uint64) uint64 {
// Initialization.
v0 := k0 ^ 0x736f6d6570736575
v1 := k1 ^ 0x646f72616e646f6d
v2 := k0 ^ 0x6c7967656e657261
v3 := k1 ^ 0x7465646279746573
t := uint64(8) << 56
// Compression.
v3 ^= m
// Round 1.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
// Round 2.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
v0 ^= m
// Compress last block.
v3 ^= t
// Round 1.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
// Round 2.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
v0 ^= t
// Finalization.
v2 ^= 0xff
// Round 1.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
// Round 2.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
// Round 3.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
// Round 4.
v0 += v1
v1 = v1<<13 | v1>>(64-13)
v1 ^= v0
v0 = v0<<32 | v0>>(64-32)
v2 += v3
v3 = v3<<16 | v3>>(64-16)
v3 ^= v2
v0 += v3
v3 = v3<<21 | v3>>(64-21)
v3 ^= v0
v2 += v1
v1 = v1<<17 | v1>>(64-17)
v1 ^= v2
v2 = v2<<32 | v2>>(64-32)
return v0 ^ v1 ^ v2 ^ v3
}
// rekey sets a new PRNG key, which is read from crypto/rand.
func (p *siprng) rekey() {
var k [16]byte
if _, err := io.ReadFull(rand.Reader, k[:]); err != nil {
panic(err.Error())
}
p.k0 = binary.LittleEndian.Uint64(k[0:8])
p.k1 = binary.LittleEndian.Uint64(k[8:16])
p.ctr = 1
}
// Uint64 returns a new pseudorandom uint64.
// It rekeys PRNG on the first call and every 64 MB of generated data.
func (p *siprng) Uint64() uint64 {
p.mu.Lock()
if p.ctr == 0 || p.ctr > 8*1024*1024 {
p.rekey()
}
v := siphash(p.k0, p.k1, p.ctr)
p.ctr++
p.mu.Unlock()
return v
}
func (p *siprng) Int63() int64 {
return int64(p.Uint64() & 0x7fffffffffffffff)
}
func (p *siprng) Uint32() uint32 {
return uint32(p.Uint64())
}
func (p *siprng) Int31() int32 {
return int32(p.Uint32() & 0x7fffffff)
}
func (p *siprng) Intn(n int) int {
if n <= 0 {
panic("invalid argument to Intn")
}
if n <= 1<<31-1 {
return int(p.Int31n(int32(n)))
}
return int(p.Int63n(int64(n)))
}
func (p *siprng) Int63n(n int64) int64 {
if n <= 0 {
panic("invalid argument to Int63n")
}
max := int64((1 << 63) - 1 - (1<<63)%uint64(n))
v := p.Int63()
for v > max {
v = p.Int63()
}
return v % n
}
func (p *siprng) Int31n(n int32) int32 {
if n <= 0 {
panic("invalid argument to Int31n")
}
max := int32((1 << 31) - 1 - (1<<31)%uint32(n))
v := p.Int31()
for v > max {
v = p.Int31()
}
return v % n
}
func (p *siprng) Float64() float64 { return float64(p.Int63()) / (1 << 63) }

12
vendor/vendor.json vendored
View File

@ -68,6 +68,18 @@
"revision": "48920167fa152d02f228cfbece7e0f1e452d200a", "revision": "48920167fa152d02f228cfbece7e0f1e452d200a",
"revisionTime": "2016-12-22T07:05:54Z" "revisionTime": "2016-12-22T07:05:54Z"
}, },
{
"checksumSHA1": "2P7Mi5cgjw7B0sgNodHpt1MTtwk=",
"path": "github.com/go-macaron/cache",
"revision": "56173531277692bc2925924d51fda1cd0a6b8178",
"revisionTime": "2015-10-13T08:11:02Z"
},
{
"checksumSHA1": "Z14F1jXWg0vXQVCNxqVJEu+VQmg=",
"path": "github.com/go-macaron/captcha",
"revision": "cbfb9d984efb41f44f63e9abaa366a3308ff78ca",
"revisionTime": "2017-03-30T19:07:02Z"
},
{ {
"checksumSHA1": "60FC18/huiHD1fZ9I3BzK61Pk2Q=", "checksumSHA1": "60FC18/huiHD1fZ9I3BzK61Pk2Q=",
"path": "github.com/go-macaron/csrf", "path": "github.com/go-macaron/csrf",