Initial commit

.gitignore

@@ -0,0 +1 @@
+jwtgen

go.mod

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+module git.kcbark.net/kcbark/jwtgen
+
+go 1.15
+
+require github.com/dgrijalva/jwt-go v3.2.0+incompatible

go.sum

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+github.com/dgrijalva/jwt-go v1.0.2 h1:KPldsxuKGsS2FPWsNeg9ZO18aCrGKujPoWXn2yo+KQM=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=

main.go

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+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/dgrijalva/jwt-go"
+)
+
+func main() {
+
+	secret := os.Getenv("JWT_SECRET")
+
+	if secret == "" {
+		fmt.Println("No secret in environment")
+	}
+
+	hostname, err := os.Hostname()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println(hostname)
+
+	usernameFlag := flag.String("username", "demo", "username to use when generating jwt token")
+	issuerFlag := flag.String("issuer", "issuer.golang.com", "issuer to use when generating jwt token")
+	expireFlag := flag.Int("expire", 0, "expire how many hours when generating jwt token")
+	adminFlag := flag.Bool("admin", false, "should the user be admin?")
+	writeFlag := flag.Bool("write", false, "should the user be able to write?")
+	readFlag := flag.Bool("read", true, "should the user be able to read?")
+
+	flag.Parse()
+
+	var token *jwt.Token
+	if *expireFlag == 0 {
+		token = jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
+			"username": *usernameFlag,
+			"admin":    *adminFlag,
+			"write":    *writeFlag,
+			"read":     *readFlag,
+			"iss":      *issuerFlag,
+			"iat":      time.Now().Unix(),
+		})
+	} else {
+		token = jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
+			"username": *usernameFlag,
+			"admin":    *adminFlag,
+			"write":    *writeFlag,
+			"read":     *readFlag,
+			"iss":      *issuerFlag,
+			"exp":      time.Now().Add(time.Hour * time.Duration(*expireFlag)).Unix(),
+			"iat":      time.Now().Unix(),
+		})
+	}
+	tokenString, err := token.SignedString([]byte(secret))
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Printf("Generated JWT token for\n")
+	fmt.Printf("Username: %s\n", *usernameFlag)
+	fmt.Printf("Admin: %v\n", *adminFlag)
+	fmt.Printf("Write: %v\n", *writeFlag)
+	fmt.Printf("Read: %v\n", *readFlag)
+	fmt.Printf("Issuer: %s\n", *issuerFlag)
+	fmt.Printf("Expire: %d hours\n", *expireFlag)
+	fmt.Println("-------- Token --------")
+	fmt.Printf("%s\n", tokenString)
+	fmt.Println("-----------------------")
+}