Go?? JWK? JWT ??? ???? ??? ??????

Go?? JWK? ???? JWT ??? ????? ?? ??? ????.

1. ??? ?????? ?????. "github.com/dgrijalva/jwt-go" ? "github.com/lestrrat-go/jwx/jwk".
2. ??? URL?? JSON ? ? ??(JWKS)? ?????.
3. JWT ???? ? ID("kid")? ?????.
4. JWT ???? ???? ?? ????. ? ID? ???? JWKS.
5. ??? ???? ?? JWT ??????? ??? ? ?? ???? ?? ?????.
6. "Parse()" ??? ???? JWT? ?? ?????. JWT ??????? ?? ? ?? ??? ?????.
7. ??? ???? JWT? ????? ?? ???? ??? ??? ? ????. ??? ??? ??????.

??? ??? ??? ???? ?? ?? ?????.

import (
    "errors"
    "fmt"

    "github.com/dgrijalva/jwt-go"
    "github.com/lestrrat-go/jwx/jwk"
)

const token = `eyJhbGciOiJSUzI1NiIsImtpZCI6Ind5TXdLNEE2Q0w5UXcxMXVvZlZleVExMTlYeVgteHlreW1ra1h5Z1o1T00ifQ.eyJzdWIiOiIwMHUxOGVlaHUzNDlhUzJ5WDFkOCIsIm5hbWUiOiJva3RhcHJveHkgb2t0YXByb3h5IiwidmVyIjoxLCJpc3MiOiJodHRwczovL2NvbXBhbnl4Lm9rdGEuY29tIiwiYXVkIjoidlpWNkNwOHJuNWx4ck45YVo2ODgiLCJpYXQiOjE0ODEzODg0NTMsImV4cCI6MTQ4MTM5MjA1MywianRpIjoiSUQuWm9QdVdIR3IxNkR6a3RUbEdXMFI4b1lRaUhnVWg0aUotTHo3Z3BGcGItUSIsImFtciI6WyJwd2QiXSwiaWRwIjoiMDBveTc0YzBnd0hOWE1SSkJGUkkiLCJub25jZSI6Im4tMFM2X1d6QTJNaiIsInByZWZlcnJlZF91c2VybmFtZSI6Im9rdGFwcm94eUBva3RhLmNvbSIsImF1dGhfdGltZSI6MTQ4MTM4ODQ0MywiYXRfaGFzaCI6Im1YWlQtZjJJczhOQklIcV9CeE1ISFEifQ.OtVyCK0sE6Cuclg9VMD2AwLhqEyq2nv3a1bfxlzeS-bdu9KtYxcPSxJ6vxMcSSbMIIq9eEz9JFMU80zqgDPHBCjlOsC5SIPz7mm1Z3gCwq4zsFJ-2NIzYxA3p161ZRsPv_3bUyg9B_DPFyBoihgwWm6yrvrb4rmHXrDkjxpxCLPp3OeIpc_kb2t8r5HEQ5UBZPrsiScvuoVW13YwWpze59qBl_84n9xdmQ5pS7DklzkAVgqJT_NWBlb5uo6eW26HtJwHzss7xOIdQtcOtC1Gj3O82a55VJSQnsEEBeqG1ESb5Haq_hJgxYQnBssKydPCIxdZiye-0Ll9L8wWwpzwig`

const jwksURL = `https://companyx.okta.com/oauth2/v1/keys`

func getKey(token *jwt.Token) (interface{}, error) {

    set, err := jwk.FetchHTTP(jwksURL)
    if err != nil {
        return nil, err
    }

    keyID, ok := token.Header["kid"].(string)
    if !ok {
        return nil, errors.New("expecting JWT header to have string kid")
    }

    if key := set.LookupKeyID(keyID); len(key) == 1 {
        return key[0].Materialize()
    }

    return nil, fmt.Errorf("unable to find key %q", keyID)
}

func main() {
    token, err := jwt.Parse(token, getKey)
    if err != nil {
        panic(err)
    }
    claims := token.Claims.(jwt.MapClaims)
    for key, value := range claims {
        fmt.Printf("%s\t%v\n", key, value)
    }
}

? ??? Go?? JWK? ???? JWT ??? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!