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jwtsigner.go
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jwtsigner.go
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package jwtsigner
import (
"encoding/json"
"time"
errs "github.com/Basic-Components/jwtrpc/errs"
utils "github.com/Basic-Components/jwtrpc/utils"
jwt "github.com/dgrijalva/jwt-go"
uuid "github.com/satori/go.uuid"
)
// Signer 签名器
type Signer struct {
key interface{}
alg jwt.SigningMethod
defaultClaims map[string]interface{}
}
// New 创建一个Signer对象
func New(method string, key interface{}, claims map[string]interface{}) *Signer {
alg := jwt.GetSigningMethod(method)
//var signer *Signer
signer := &Signer{
key: key,
alg: alg,
defaultClaims: claims}
return signer
}
// NewFromPath 从路径上读取密钥文件创建一个Signer对象
func NewFromPath(method string, keyPath string, claims map[string]interface{}) (*Signer, error) {
keybytes, err := utils.LoadData(keyPath)
if err != nil {
return nil, errs.LoadKeyError
}
if utils.IsEs(method) {
key, err := jwt.ParseECPrivateKeyFromPEM(keybytes)
if err != nil {
return nil, err
}
return New(method, key, claims), nil
} else if utils.IsRs(method) {
key, err := jwt.ParseRSAPrivateKeyFromPEM(keybytes)
if err != nil {
return nil, err
}
return New(method, key, claims), nil
} else {
return nil, errs.SignerTypeError
}
}
// Sign 用Signer对象签名
func (signer *Signer) Sign(data []byte) (string, error) {
var claims jwt.MapClaims
if err := json.Unmarshal(data, &claims); err != nil {
return "", errs.ParseClaimsToJsonError
} else {
for key, value := range signer.defaultClaims {
claims[key] = value
}
claims["iat"] = int(time.Now().Unix())
claims["jti"] = uuid.NewV4().String()
token := jwt.NewWithClaims(signer.alg, claims)
if out, err := token.SignedString(signer.key); err == nil {
return out, nil
} else {
return "", errs.SignTokenError
}
}
}