commit 84dcfdf695c09486a688bc289e279419eda80c63 Author: 諏訪子 Date: Wed Sep 27 22:26:56 2023 +0900 最初コミット diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 0000000..0a0d870 --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,2 @@ +# 1.0.0 +* 最初リリース diff --git a/LICENSE.txt b/LICENSE.txt new file mode 100644 index 0000000..0a04128 --- /dev/null +++ b/LICENSE.txt @@ -0,0 +1,165 @@ + GNU LESSER GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + + This version of the GNU Lesser General Public License incorporates +the terms and conditions of version 3 of the GNU General Public +License, supplemented by the additional permissions listed below. + + 0. Additional Definitions. + + As used herein, "this License" refers to version 3 of the GNU Lesser +General Public License, and the "GNU GPL" refers to version 3 of the GNU +General Public License. + + "The Library" refers to a covered work governed by this License, +other than an Application or a Combined Work as defined below. + + An "Application" is any work that makes use of an interface provided +by the Library, but which is not otherwise based on the Library. +Defining a subclass of a class defined by the Library is deemed a mode +of using an interface provided by the Library. + + A "Combined Work" is a work produced by combining or linking an +Application with the Library. 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Combined Works. + + You may convey a Combined Work under terms of your choice that, +taken together, effectively do not restrict modification of the +portions of the Library contained in the Combined Work and reverse +engineering for debugging such modifications, if you also do each of +the following: + + a) Give prominent notice with each copy of the Combined Work that + the Library is used in it and that the Library and its use are + covered by this License. + + b) Accompany the Combined Work with a copy of the GNU GPL and this license + document. + + c) For a Combined Work that displays copyright notices during + execution, include the copyright notice for the Library among + these notices, as well as a reference directing the user to the + copies of the GNU GPL and this license document. + + d) Do one of the following: + + 0) Convey the Minimal Corresponding Source under the terms of this + License, and the Corresponding Application Code in a form + suitable for, and under terms that permit, the user to + recombine or relink the Application with a modified version of + the Linked Version to produce a modified Combined Work, in the + manner specified by section 6 of the GNU GPL for conveying + Corresponding Source. + + 1) Use a suitable shared library mechanism for linking with the + Library. 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Combined Libraries. + + You may place library facilities that are a work based on the +Library side by side in a single library together with other library +facilities that are not Applications and are not covered by this +License, and convey such a combined library under terms of your +choice, if you do both of the following: + + a) Accompany the combined library with a copy of the same work based + on the Library, uncombined with any other library facilities, + conveyed under the terms of this License. + + b) Give prominent notice with the combined library that part of it + is a work based on the Library, and explaining where to find the + accompanying uncombined form of the same work. + + 6. Revised Versions of the GNU Lesser General Public License. + + The Free Software Foundation may publish revised and/or new versions +of the GNU Lesser General Public License from time to time. Such new +versions will be similar in spirit to the present version, but may +differ in detail to address new problems or concerns. + + Each version is given a distinguishing version number. If the +Library as you received it specifies that a certain numbered version +of the GNU Lesser General Public License "or any later version" +applies to it, you have the option of following the terms and +conditions either of that published version or of any later version +published by the Free Software Foundation. If the Library as you +received it does not specify a version number of the GNU Lesser +General Public License, you may choose any version of the GNU Lesser +General Public License ever published by the Free Software Foundation. + + If the Library as you received it specifies that a proxy can decide +whether future versions of the GNU Lesser General Public License shall +apply, that proxy's public statement of acceptance of any version is +permanent authorization for you to choose that version for the +Library. diff --git a/README.md b/README.md new file mode 100644 index 0000000..1e52a9f --- /dev/null +++ b/README.md @@ -0,0 +1,39 @@ +# gocaptcha + +## 例 +```go +package main + +import ( + "fmt" + "log" + "gitler.moe/suwako/gocaptcha" +) + +func main () { + captcha, err := gocaptcha.GenerateCaptcha("font.ttf", gocaptcha.Hiragana, 5) + if err != nil { + log.Fatalf("キャプチャを創作に失敗しました。 %v", err) + } + + input := "あいうえお" // フォームから + + isValid := gocaptcha.VerifyCaptcha(input, captcha.Text) + if isValid { + fmt.Println("正解") + } else { + fmt.Println("不正") + } +} +``` + +## GenerateCaptcha +フォントは自分で受け取って下さい。\ +おすすめのやつは「Noto Sans」です。 + +文字モードは： +* gocaptcha.Latin +* gocaptcha.Cyrillic +* gocaptcha.Hiragana +* gocaptcha.Katakana +* gocaptcha.Kanji diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..c7865ae --- /dev/null +++ b/go.mod @@ -0,0 +1,8 @@ +module gitler.moe/suwako/gocaptcha + +go 1.21.1 + +require ( + github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 + golang.org/x/image v0.12.0 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..9bcd006 --- /dev/null +++ b/go.sum @@ -0,0 +1,35 @@ +github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g= +github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k= +github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc= +golang.org/x/image v0.12.0 h1:w13vZbU4o5rKOFFR8y7M+c4A5jXDC0uXTdHYRP8X2DQ= +golang.org/x/image v0.12.0/go.mod h1:Lu90jvHG7GfemOIcldsh9A2hS01ocl6oNO7ype5mEnk= +golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4= +golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs= +golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg= +golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c= +golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs= +golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= +golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8= +golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= +golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ= +golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8= +golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE= +golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= +golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= +golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc= +golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU= +golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= diff --git a/main.go b/main.go new file mode 100644 index 0000000..d4ccf54 --- /dev/null +++ b/main.go @@ -0,0 +1,94 @@ +package gocaptcha + +import ( + "bytes" + "crypto/rand" + "encoding/base64" + "image" + "image/color" + "image/draw" + "image/png" + "io/ioutil" + "math/big" + "strings" + + "golang.org/x/image/font" + "golang.org/x/image/math/fixed" + "github.com/golang/freetype/truetype" +) + +type Captcha struct { + Text string + Image []byte +} + +const ( + Latin = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" + Cyrillic = "абвгдеёжзийклмнопрстуфхцчшщъыьэюя" + Hiragana = "あいうえおかがきぎくぐけげこごさざしじすずせぜそぞただちぢつづてでとどなにぬねのはばぱひびぴふぶぷへべぺほぼぽまみむめもやゆよらりるれろわゐゑをん" + Katakana = "アイウエオカガキギクグケゲコゴサザシジスズセゼソゾタダチヂツヅテデトドナニヌネノハバパヒビピフビプヘベペホボポマミムメモヤユヨラリルレロワヰヱヲン" + Kanji = "一二三四五六七八九十口日月火水木金土曜上下中山川土空田天生花草虫犬人名女男子目耳口手足見音力気円入出立休先夕本文字学校村町森正水火玉王石礼羽老考者而也切友夕化外多夜太妹姉宀它安宅字守寺時尺少山工左川巾市帰年広弓引弟弱張強当形後心思戸才教数文新方日明星春昼月有朝木本東林森校桜橋正歩死母毛気水火父片牛犬王生田男矢石示禾米羊考耳聞肉自至舌船良色茶見貝赤走起足車辛辰辷邑部都里野金長門間阜隹雨青非面革韋音页風飛食首香馬高黒黽齐交会体作仕他代以低住使便借側停備働元兄光写冬切別力勉動区医去参商問図園土地場声売夏外多夜夢大天太女好妹姉始字守室家寒少専局屋山岩工市帰常平年広座式引弱強当形役後心必忘忙思急性息悪意愛感慣懐成我戦戸所手打投拾持指放整早映春昼昼暑曲有服期望未末本村果林森楽橋歌止歩死毎比氏民求池治法泳洋活流浴海消深温港湖湯漢火版然牛物特犬王珍理生産用田由甲申男疲白皮皿相看県真研私究究窓立答等箱節米粉約級終組経線羽考聞肉自船良色花茶行血表詩語読誰負財買走起足身転軽農近道野金長門開間関阪陽階集面頭題飲館駅験马高黒" +) + +func GenerateCaptcha(fontPath, charset string, length int) (*Captcha, error) { + text := genTxt(charset, length) + + fontBytes, err := ioutil.ReadFile(fontPath) + if err != nil { + return nil, err + } + + f, err := truetype.Parse(fontBytes) + if err != nil { + return nil, err + } + + img := image.NewRGBA(image.Rect(0, 0, 300, 100)) + bgColor := color.RGBA{0, 0, 0, 255} + draw.Draw(img, img.Bounds(), &image.Uniform{bgColor}, image.Point{}, draw.Src) + + d := &font.Drawer{ + Dst: img, + Src: image.NewUniform(color.RGBA{255, 255, 255, 255}), + Face: truetype.NewFace(f, &truetype.Options{ + Size: 24, + DPI: 72, + Hinting: font.HintingFull, + }), + } + + d.Dot = fixed.Point26_6{ + X: fixed.Int26_6(20 * 64), + Y: fixed.Int26_6(50 * 64), + } + d.DrawString(text) + + imgBuffer := new(bytes.Buffer) + err = png.Encode(imgBuffer, img) + if err != nil { + return nil, err + } + + imgBytes := imgBuffer.Bytes() + imgBase64Str := base64.StdEncoding.EncodeToString(imgBytes) + + return &Captcha{ + Text: text, + Image: []byte(imgBase64Str), + }, nil +} + +func VerifyCaptcha(input, captchaText string) bool { + return strings.EqualFold(input, captchaText) +} + +func genTxt(charset string, length int) string { + runes := []rune(charset) + text := make([]rune, length) + for i := range text { + bigIndex, _ := rand.Int(rand.Reader, big.NewInt(int64(len(runes)))) + randomIndex := int(bigIndex.Int64()) + text[i] = runes[randomIndex] + } + return string(text) +}