[ERR] tls: failed to verify certificate: x509: certificate signed by unknown authority

[FawenYo]

System Informations

• Go version: 1.21.4
• OS: scratch

Expected Behavior

Reply/Push messages successfully

Current Behavior

{"component":"main","level":"info","msg":"Post \"https://api.line.me/v2/bot/message/reply\": tls: failed to verify certificate: x509: certificate signed by unknown authority","time":"2023-12-18T10:36:06Z"}

Steps to Reproduce

Here is part of my code

package line

import (
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/line/line-bot-sdk-go/v8/linebot/messaging_api"
	"github.com/line/line-bot-sdk-go/v8/linebot/webhook"
)

var (
	log = utils.GetLogger()
)

func LINEHandler(c *gin.Context) {
	path := c.Param("action")

	// Use a switch case to redirect to different functions
	switch path {
	case "/callback":
		callback(c)
	default:
		c.JSON(http.StatusNotFound, gin.H{"message": "Not found"})
	}
}

func callback(c *gin.Context) {
	bot, err := messaging_api.NewMessagingApiAPI(utils.GetLINEConfig().LINEChannelAccessToken)
	if err != nil {
		log.WithField("component", "line").Errorf("Failed to create new bot: %s", err)
		c.JSON(http.StatusInternalServerError, gin.H{"message": "Internal server error"})
		return
	}

	cb, err := webhook.ParseRequest(utils.GetLINEConfig().LINEChannelSecret, c.Request)
	if err != nil {
		log.WithField("component", "line").Errorf("Failed to parse request: %s", err)
		if err == webhook.ErrInvalidSignature {
			c.JSON(http.StatusBadRequest, gin.H{"message": "Invalid signature"})
		} else {
			c.JSON(http.StatusInternalServerError, gin.H{"message": "Internal server error"})
		}
		return
	}

	for _, event := range cb.Events {
		switch e := event.(type) {
		case webhook.MessageEvent:
			switch message := e.Message.(type) {
			case webhook.TextMessageContent:
				if _, err = bot.ReplyMessage(
					&messaging_api.ReplyMessageRequest{
						ReplyToken: e.ReplyToken,
						Messages: []messaging_api.MessageInterface{
							messaging_api.TextMessage{
								Text: message.Text,
							},
						},
					},
				); err != nil {
					log.Print(err)
				} else {
					log.Println("Sent text reply.")
				}
			default:
				log.WithField("component", "line").Errorf("Unsupported message: %T\n", message)
			}
		default:
			log.WithField("component", "line").Errorf("Unsupported event: %T\n", event)
		}
	}

}

It seems my code can get the message event correctly, but I just couldn't send the message. Any help is appreciated.

[FawenYo]

OK... so I found where the problem is. The error is caused by not copy SSL certificates to /etc/ssl/certs/ca-certificates.crt, and copying it to the path will solve this error. Issue closed.