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jwt.go
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jwt.go
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package authutil
import (
"net/http"
"net/url"
"strings"
jwt "github.com/golang-jwt/jwt/v5"
"github.com/grokify/mogo/errors/errorsutil"
"github.com/grokify/mogo/net/http/httputilmore"
"golang.org/x/oauth2"
)
func ParseJwtTokenString(tokenString string, secretKey string, claims jwt.Claims) (*jwt.Token, error) {
// https://stackoverflow.com/questions/41077953/go-language-and-verify-jwt
if claims == nil {
token, err := jwt.Parse(tokenString, func(token *jwt.Token) (any, error) {
return []byte(secretKey), nil
})
if err != nil {
return nil, errorsutil.Wrap(err, "ParseTokenString.jwt.Parse")
}
return token, nil
}
// *jwt.StandardClaims
// https://stackoverflow.com/questions/45405626/decoding-jwt-token-in-golang
token, err := jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (any, error) {
return []byte(secretKey), nil
})
if err != nil {
return nil, errorsutil.Wrap(err, "ParseTokenString.jwt.ParseWithClaims")
}
return token, nil
}
func NewTokenOAuth2JWT(tokenURL, clientID, clientSecret, jwtBase64Enc string) (*oauth2.Token, error) {
body := url.Values{
ParamGrantType: {GrantTypeJWTBearer},
ParamAssertion: {jwtBase64Enc}}
req, err := http.NewRequest(
http.MethodPost, tokenURL,
strings.NewReader(body.Encode()))
if err != nil {
return nil, err
}
req.Header.Add(httputilmore.HeaderContentType, httputilmore.ContentTypeAppFormURLEncoded)
if len(clientID) > 0 || len(clientSecret) > 0 {
b64Enc, err := RFC7617UserPass(clientID, clientSecret)
if err != nil {
return nil, err
}
req.Header.Add(httputilmore.HeaderAuthorization, TokenBasic+" "+b64Enc)
}
client := http.Client{}
resp, err := client.Do(req)
if err != nil {
return nil, err
}
return ParseTokenReader(resp.Body)
}