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server.go
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server.go
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package jwtex
import (
"crypto"
"github.com/aws/aws-sdk-go/service/lambda/lambdaiface"
"github.com/coreos/go-oidc/v3/oidc"
"io/ioutil"
"net/http"
)
type Server struct {
issuer string
keyId string
signer crypto.Signer
verifiers map[string]*oidc.IDTokenVerifier
mapperArn string
lambda lambdaiface.LambdaAPI
}
func NewServer(issuer string, keyId string, signer crypto.Signer, verifiers map[string]*oidc.IDTokenVerifier, mapperArn string, lambda lambdaiface.LambdaAPI) *Server {
return &Server{issuer: issuer, keyId: keyId, signer: signer, verifiers: verifiers, mapperArn: mapperArn, lambda: lambda}
}
func (srv *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
mux := http.NewServeMux()
mux.HandleFunc("/exchange", srv.handleExchange)
mux.HandleFunc("/.well-known/openid-configuration", srv.handleDiscoveryDocument)
mux.HandleFunc("/.well-known/jwks", srv.handleJwks)
mux.ServeHTTP(w, r)
}
func (srv *Server) handleExchange(w http.ResponseWriter, r *http.Request) {
inputJwt, err := ioutil.ReadAll(r.Body)
if err != nil {
http.Error(w, "unable to read request body", 400)
panic(err)
}
input := ExchangeInput{
Jwt: string(inputJwt),
IssuerId: r.URL.Query().Get("issuerId"),
}
output, err := srv.exchange(r.Context(), &input)
if err != nil {
http.Error(w, "unable to exchange", 400)
panic(err)
}
w.Header().Set("Content-Type", "application/jwt")
w.Write([]byte(output.Jwt))
}