From ecf2a0a2dd085a132db42405a9283cecfe950cea Mon Sep 17 00:00:00 2001 From: Nikita Tokarchuk Date: Sat, 4 Jan 2020 12:36:52 +0100 Subject: [PATCH] task1 backend --- task1-backend/.dockerignore | 7 + task1-backend/config/task1.yaml | 3 + task1-backend/go.mod | 12 ++ task1-backend/go.sum | 174 +++++++++++++++++++++++ task1-backend/lib/api.go | 137 ++++++++++++++++++ task1-backend/lib/conf.go | 13 ++ task1-backend/lib/configure/configure.go | 38 +++++ task1-backend/lib/env/env.go | 13 ++ task1-backend/main.go | 85 +++++++++++ 9 files changed, 482 insertions(+) create mode 100644 task1-backend/.dockerignore create mode 100644 task1-backend/config/task1.yaml create mode 100644 task1-backend/go.mod create mode 100644 task1-backend/go.sum create mode 100644 task1-backend/lib/api.go create mode 100644 task1-backend/lib/conf.go create mode 100644 task1-backend/lib/configure/configure.go create mode 100644 task1-backend/lib/env/env.go create mode 100644 task1-backend/main.go diff --git a/task1-backend/.dockerignore b/task1-backend/.dockerignore new file mode 100644 index 0000000..bd556b0 --- /dev/null +++ b/task1-backend/.dockerignore @@ -0,0 +1,7 @@ +* +!lib +!config +!go.mod +!go.sum +!keys.go +!main.go diff --git a/task1-backend/config/task1.yaml b/task1-backend/config/task1.yaml new file mode 100644 index 0000000..eceb1e2 --- /dev/null +++ b/task1-backend/config/task1.yaml @@ -0,0 +1,3 @@ +httpApi: + addr: "0.0.0.0:8081" + base: "/answer" diff --git a/task1-backend/go.mod b/task1-backend/go.mod new file mode 100644 index 0000000..6d0417d --- /dev/null +++ b/task1-backend/go.mod @@ -0,0 +1,12 @@ +module github.com/mainnika/a-quest/task1-backend + +go 1.13 + +require ( + github.com/dgrijalva/jwt-go v3.2.0+incompatible + github.com/google/uuid v1.1.1 + github.com/jackwhelpton/fasthttp-routing/v2 v2.0.0 + github.com/sirupsen/logrus v1.4.2 + github.com/spf13/viper v1.6.1 + github.com/valyala/fasthttp v1.7.1 +) diff --git a/task1-backend/go.sum b/task1-backend/go.sum 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h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74= +gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I= +gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/task1-backend/lib/api.go b/task1-backend/lib/api.go new file mode 100644 index 0000000..f4dc458 --- /dev/null +++ b/task1-backend/lib/api.go @@ -0,0 +1,137 @@ +package lib + +import ( + "crypto/ecdsa" + "crypto/sha256" + "crypto/subtle" + "encoding/hex" + "encoding/json" + "fmt" + "net/http" + "strings" + "time" + + jwtgo "github.com/dgrijalva/jwt-go" + "github.com/google/uuid" + routing "github.com/jackwhelpton/fasthttp-routing/v2" + "github.com/jackwhelpton/fasthttp-routing/v2/access" + "github.com/jackwhelpton/fasthttp-routing/v2/cors" + "github.com/jackwhelpton/fasthttp-routing/v2/fault" + log "github.com/sirupsen/logrus" + "github.com/valyala/fasthttp" +) + +const ( + URL = "/check" + URLHealthz = "/healthz" +) + +type Api struct { + Base string + Alg string + Pub *ecdsa.PublicKey + Priv *ecdsa.PrivateKey + Answer []byte +} + +type Answer struct { + Answer json.RawMessage `json:"answer"` + Name string `json:"name"` +} + +func (a *Api) GetHandler() fasthttp.RequestHandler { + + crs := cors.Options{ + AllowOrigins: "*", + AllowHeaders: "*", + AllowMethods: "*", + AllowCredentials: true, + } + + router := routing.New() + router.Use( + access.Logger(log.Debugf), + cors.Handler(crs), + fault.PanicHandler(log.Warnf), + ) + + base := strings.TrimSuffix(a.Base, "/") + api := router.Group(base) + + api.Post(URL, a.checkAnswer) + api.Get(URLHealthz, a.healthCheck) + + return router.HandleRequest +} + +func (a *Api) healthCheck(ctx *routing.Context) (err error) { + ctx.Response.Header.Set("Content-Type", "application/json") + _, err = ctx.WriteString("{\"health\":\"ok\"}") + if err != nil { + return routing.NewHTTPError(http.StatusInternalServerError, err.Error()) + } + + return +} + +func (a *Api) checkAnswer(ctx *routing.Context) (err error) { + + now := time.Now() + id := uuid.New() + answer := &Answer{} + + err = json.Unmarshal(ctx.Request.Body(), answer) + if err != nil { + return routing.NewHTTPError(http.StatusBadRequest, err.Error()) + } + + hash := sha256.New() + hash.Write(answer.Answer) + + hexed := make([]byte, hex.EncodedLen(sha256.Size)) + + hex.Encode(hexed, hash.Sum(nil)) + + log.Debugf("req answer, %v", answer) + log.Debugf("req hashed, %s", hexed) + + valid := subtle.ConstantTimeCompare(a.Answer, hexed) + if valid == 0 { + return routing.NewHTTPError(http.StatusForbidden) + } + + claims := &jwtgo.StandardClaims{ + Id: id.String(), + Subject: answer.Name, + Issuer: "Anonymous Moroz Grandfather", + IssuedAt: now.Unix(), + } + + method := jwtgo.GetSigningMethod(a.Alg) + token := jwtgo.NewWithClaims(method, claims) + + jwt, err := token.SignedString(a.Priv) + if err != nil { + return routing.NewHTTPError(http.StatusInternalServerError, err.Error()) + } + + ctx.Response.Header.Set("Content-Type", "application/json") + _, err = ctx.WriteString(fmt.Sprintf(` +['переход на следующий уровень ищи в альтер имени безопасности узла', +'используй ключ чтобы открыть следующий уровень', +'%s'] +`, jwt)) + if err != nil { + return routing.NewHTTPError(http.StatusInternalServerError, err.Error()) + } + + return +} + +func (a *Api) getPrivKey(t *jwtgo.Token) (interface{}, error) { + return a.Priv, nil +} + +func (a *Api) getKey(t *jwtgo.Token) (interface{}, error) { + return a.Pub, nil +} diff --git a/task1-backend/lib/conf.go b/task1-backend/lib/conf.go new file mode 100644 index 0000000..c5e296c --- /dev/null +++ b/task1-backend/lib/conf.go @@ -0,0 +1,13 @@ +package lib + +var ( + ConfPath = "config" + ConfName = "task1" +) + +type AppConfig struct { + HttpAPI struct { + Base string `mapstructure:"base"` + Addr string `mapstructure:"addr"` + } `mapstructure:"httpApi"` +} diff --git a/task1-backend/lib/configure/configure.go b/task1-backend/lib/configure/configure.go new file mode 100644 index 0000000..5a8b469 --- /dev/null +++ b/task1-backend/lib/configure/configure.go @@ -0,0 +1,38 @@ +package configure + +import ( + "strings" + + "github.com/sirupsen/logrus" + "github.com/spf13/viper" + + "github.com/mainnika/a-quest/task1-backend/lib" + "github.com/mainnika/a-quest/task1-backend/lib/env" +) + +var Config lib.AppConfig + +func init() { + + path := env.ConfigPath + name := env.ConfigName + + if len(path) == 0 { + path = lib.ConfPath + } + + if len(name) == 0 { + name = lib.ConfName + } + + viper.AddConfigPath(path) + viper.SetConfigName(name) + viper.SetEnvPrefix(env.Prefix) + viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_")) + viper.AutomaticEnv() + + err, _ := viper.ReadInConfig(), viper.Unmarshal(&Config) + if err != nil { + logrus.Fatal(err) + } +} diff --git a/task1-backend/lib/env/env.go b/task1-backend/lib/env/env.go new file mode 100644 index 0000000..aacd260 --- /dev/null +++ b/task1-backend/lib/env/env.go @@ -0,0 +1,13 @@ +package env + +import ( + "fmt" + "os" +) + +var ( + Prefix = "CFG" + IsDevelopment = len(os.Getenv("DEBUG")) > 0 + ConfigPath = os.Getenv(fmt.Sprintf("%s_PATH", Prefix)) + ConfigName = os.Getenv(fmt.Sprintf("%s_NAME", Prefix)) +) diff --git a/task1-backend/main.go b/task1-backend/main.go new file mode 100644 index 0000000..3361f5b --- /dev/null +++ b/task1-backend/main.go @@ -0,0 +1,85 @@ +package main + +import ( + "flag" + "fmt" + "net" + "os" + + jwtgo "github.com/dgrijalva/jwt-go" + log "github.com/sirupsen/logrus" + "github.com/valyala/fasthttp" + + "github.com/mainnika/a-quest/task1-backend/lib" + . "github.com/mainnika/a-quest/task1-backend/lib/configure" + . "github.com/mainnika/a-quest/task1-backend/lib/env" +) + +var version = "dev" + +var ( + getVersion bool +) + +func init() { + + if IsDevelopment { + log.SetLevel(log.DebugLevel) + log.Debug("debug mode") + } +} + +func httpStart(apiserv *lib.Api) (httpserv *fasthttp.Server) { + + httpserv = &fasthttp.Server{ + Logger: log.StandardLogger(), + Handler: apiserv.GetHandler(), + DisableKeepalive: true, + } + + lis, err := net.Listen("tcp", Config.HttpAPI.Addr) + if err != nil { + log.Fatalf("http listen error: %v", err) + } + + err = httpserv.Serve(lis) + if err != nil { + log.Fatalf("http serve error: %v", err) + } + + return +} + +func main() { + + flag.BoolVar(&getVersion, "v", false, "version") + flag.Parse() + + if getVersion { + fmt.Println(version) + os.Exit(0) + } + + log.Debugf("version: %s", version) + log.Debugf("cfg: %v", Config) + + pubKey, err := jwtgo.ParseECPublicKeyFromPEM(publicKey) + if err != nil { + log.Fatalf("can not parse jwt key: %s", err) + } + + privKey, err := jwtgo.ParseECPrivateKeyFromPEM(privateKey) + if err != nil { + log.Fatalf("can not parse jwt key: %s", err) + } + + apiserv := &lib.Api{ + Base: Config.HttpAPI.Base, + Alg: alg, + Pub: pubKey, + Priv: privKey, + Answer: answer, + } + + httpStart(apiserv) +}