use publib key to verify in golang

verify.go

package main

import (
	"crypto"
	"crypto/rsa"
	"crypto/sha1"
	"crypto/x509"
	"encoding/base64"
	"fmt"
)

func main() {
	k := `MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDXX/MsKEBLcLeKA1d/i7ufG1qsqS97xFkIRSeX3TwmHic843AfVrzoh2pZUeOvK9ZLZQpHSM7DoHMYDGD1273+FvZXYpf5LiFtecfxko/Cku16zy6WAeCYVFjjlveBhwPmPCIk+qDRYeiIW05QE2XK+CuDnJ7sxxXIJSSgD3Jo5wIDAQAB`
	key, _ := base64.StdEncoding.DecodeString(k)
	re, err := x509.ParsePKIXPublicKey(key)
	pub := re.(*rsa.PublicKey)
	if err != nil {
		fmt.Println(err)
		return
	}
	text := []byte("12999763169054705758.1350895718127996")
	sig := "e9PE8gfsX9WJQNTojeOJVFAOUbWbAxKZ6LxP8B200HithDFA9dc8FMMny5F4Lv7Kear2juuKTcvqFFqUvu0Yyk2R5g7wlDqXjePvi4YRH2b4FyA876OiNGVFQOaV8ErRtoX1uW8XaZM+tk0zYdsdYOC+UZOsqGC/zUfufJ02/Fe9vfFKWFAwnu4A5n0BM7hPv9fl+E+aQc9KJzdUjMPHHhe3pIkJLwahnCdrt3y+cKwuNMrKwb5NbaI3CWHDr6rWVKnG1PbkT98Z7alVL48kclo0RcV8VUvEtj2qm+6Lbcy0eEEfPNkzwIVg70bHTZ0GWhVYVBEVlt3vny66emKPpw=="
	h := sha1.New()
	h.Write(text)
	digest := h.Sum(nil)

	ds, _ := base64.StdEncoding.DecodeString(sig)
	err = rsa.VerifyPKCS1v15(pub, crypto.SHA1, digest, ds)
	fmt.Println("verify:", err)
}