Add jwt verify cmd

cmd/web5/cmd_jwt_verify.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/tbd54566975/web5-go/jwt"
+)
+
+type jwtVerifyCMD struct {
+	JWT      string `arg:"" help:"The base64 encoded JWT"`
+	Claims   bool   `help:"Only print the JWT Claims." default:"false"`
+	NoIndent bool   `help:"Print the decoded VC-JWT without indentation." default:"false"`
+}
+
+func (c *jwtVerifyCMD) Run() error {
+	decoded, err := jwt.Verify(c.JWT)
+	if err != nil {
+		return err
+	}
+
+	var partToPrint any
+	if c.Claims {
+		partToPrint = decoded.Claims
+	} else {
+		partToPrint = decoded
+	}
+
+	var bytes []byte
+	if c.NoIndent {
+		bytes, err = json.Marshal(partToPrint)
+	} else {
+		bytes, err = json.MarshalIndent(partToPrint, "", "  ")
+	}
+	if err != nil {
+		return err
+	}
+
+	fmt.Println(string(bytes))
+
+	return nil
+}

cmd/web5/main.go

@@ -14,7 +14,7 @@ type CLI struct {
 	JWT struct {
 		Sign   jwtSignCMD   `cmd:"" help:"Sign a JWT."`
 		Decode jwtDecodeCMD `cmd:"" help:"Decode a JWT."`
-		// todo verify
+		Verify jwtVerifyCMD `cmd:"" help:"Verify a JWT."`
 	} `cmd:"" help:"Interface with JWT's."`
 	DID struct {
 		Resolve didResolveCMD `cmd:"" help:"Resolve a DID."`