Не выходит получить публичный ключ из PEM формата

package main
 
import (
    "fmt"
    "crypto/x509"
    "crypto/rsa"
    "encoding/pem"
)
 
var pub string = "-----BEGIN RSA PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyqr5QwJzufJb9oJGA19svullqKlipBlaqAbyOKufKz7Cc73LctFPL9QF2+5YSY+wpDYFZHJx7mtTql6evQg0hq9fXSm/BvVwbEbm2VtWIWkJNYVFu4ORtNCnidk7d5T89ZlaaxIO0Tw601Q3NaQTIQDdh7CVhixAhQml7VgWJ3+I/2cH4BbV1Vse6oYXGxLMj09N28QSenst4uMSlMZGm+0KEQrOMQ7yLJHIYF2NZ2jEckSomaWFdrbGIs2xPtHke+XQyUDcEKz5UU36VBqTOjiWPqu2P8WaVRZFyryYH5v7PGJ9AUrIFxMgfebIaAUr9Teh0JC5ZBtb/xFbDbzu2QIDAQAB-----END RSA PUBLIC KEY-----"
var publicKey []byte
var wait sync.WaitGroup
 
func check(e error) {
    if e != nil {
        panic(e)
    }
}
 
func BytesToPublicKey(pub []byte) *rsa.PublicKey {
    block, _ := pem.Decode(pub)
    enc := x509.IsEncryptedPEMBlock(block)
    b := block.Bytes
    
    if enc {
        b, _ = x509.DecryptPEMBlock(block, nil)
        
    }
    ifc, _ := x509.ParsePKIXPublicKey(b)
    key, _ := ifc.(*rsa.PublicKey)
    
    return key
}
 
func main() {
    fmt.Printf("%s\n", BytesToPublicKey([]byte(pub)))
    
}

key, ok := ifc.(*rsa.PublicKey)
if !ok {
return fmt.Errorf("blablabla")
}

package main
 
import (
    "crypto/rsa"
    "crypto/x509"
    "encoding/pem"
    "fmt"
)
 
var pub string = `-----BEGIN RSA PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyqr5QwJzufJb9oJGA19s
vullqKlipBlaqAbyOKufKz7Cc73LctFPL9QF2+5YSY+wpDYFZHJx7mtTql6evQg0
hq9fXSm/BvVwbEbm2VtWIWkJNYVFu4ORtNCnidk7d5T89ZlaaxIO0Tw601Q3NaQT
IQDdh7CVhixAhQml7VgWJ3+I/2cH4BbV1Vse6oYXGxLMj09N28QSenst4uMSlMZG
m+0KEQrOMQ7yLJHIYF2NZ2jEckSomaWFdrbGIs2xPtHke+XQyUDcEKz5UU36VBqT
OjiWPqu2P8WaVRZFyryYH5v7PGJ9AUrIFxMgfebIaAUr9Teh0JC5ZBtb/xFbDbzu
2QIDAQAB
-----END RSA PUBLIC KEY-----`
 
func main() {
    var pubkey *rsa.PublicKey
    var ok bool
 
    block, _ := pem.Decode([]byte(pub))
    if block == nil {
        panic("Decode failed")
    }
 
    pub, err := x509.ParsePKIXPublicKey(block.Bytes)
    if err != nil {
        fmt.Println("ParsePKIXPublicKey failed")
        panic(err)
    }
 
    if pubkey, ok = pub.(*rsa.PublicKey); !ok {
        panic("Assertion failed")
    }
 
    fmt.Println(pubkey.N)
 
}