/
github.go
77 lines (64 loc) · 1.97 KB
/
github.go
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// Copyright 2023 The Witness Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fulcio
import (
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
)
func fetchToken(tokenURL string, bearer string, audience string) (string, error) {
if tokenURL == "" || bearer == "" || audience == "" {
return "", fmt.Errorf("tokenURL, bearer, and audience cannot be empty")
}
client := &http.Client{}
//add audient "&audience=witness" to the end of the tokenURL, parse it, and then add it to the query
u, err := url.Parse(tokenURL)
if err != nil {
return "", err
}
//check to see if the tokenURL already has a query with an audience
//if it does throw an error
q := u.Query()
if q.Get("audience") != audience && q.Get("audience") != "" {
return "", fmt.Errorf("api error: tokenURL already has an audience, %s, and it does not match the audience, %s", q.Get("audience"), audience)
}
q.Add("audience", audience)
u.RawQuery = q.Encode()
reqURL := u.String()
req, err := http.NewRequest("GET", reqURL, nil)
if err != nil {
return "", err
}
req.Header.Add("Authorization", "bearer "+bearer)
resp, err := client.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return "", err
}
var tokenResponse struct {
Count int `json:"count"`
Value string `json:"value"`
}
err = json.Unmarshal(body, &tokenResponse)
if err != nil {
return "", err
}
return tokenResponse.Value, nil
}