如何始终通过无效的密钥类型错误生成JWT令牌

从自述文件：

ECDSA签名方法（ES256，ES384，ES512）期望 ecdsa.PrivateKey进行签名，而 ecdsa.PublicKey进行验证

因此，使用椭圆曲线键：

package mainimport (        "crypto/ecdsa"        "crypto/elliptic"        "crypto/rand"        "log"        jwt "github.com/dgrijalva/jwt-go")func main() {        key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)        if err != nil {     log.Fatal(err)        }        claims := &jwt.StandardClaims{     ExpiresAt: 15000,     Issuer:    "test",        }        token := jwt.NewWithClaims(jwt.SigningMethodES256, claims)        tokenString, err := token.SignedString(key)        if err != nil {     log.Fatal(err)        }        log.Println(tokenString)}

要存储生成的密钥以供以后与jwt.ParseECPrivateKeyFromPEM和jwt.ParseECPublicKeyFromPEM一起使用：

import (        "crypto/ecdsa"        "crypto/x509"        "encoding/pem")func pemKeyPair(key *ecdsa.PrivateKey) (privKeyPEM []byte, pubKeyPEM []byte, err error) {        der, err := x509.MarshalECPrivateKey(key)        if err != nil {     return nil, nil, err        }        privKeyPEM = pem.EnpreToMemory(&pem.Block{     Type:  "EC PRIVATE KEY",     Bytes: der,        })        der, err = x509.MarshalPKIXPublicKey(key.Public())        if err != nil {     return nil, nil, err        }        pubKeyPEM = pem.EnpreToMemory(&pem.Block{     Type:  "EC PUBLIC KEY",     Bytes: der,        })        return}