b03acbd029
Host chmod cannot open 0700 dirs owned by UID 1000, so `-f` never sees root_ca.crt. Chmod from inside the container as root while waiting for the cert. Signed-off-by: Bryan Frimin <bryan@probo.com>
102 lines
2.8 KiB
Go
102 lines
2.8 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package oauth2
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"strings"
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"go.probo.inc/probo/pkg/uri"
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)
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const (
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openIDConfigurationPath = "/.well-known/openid-configuration"
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maxDiscoveryDocumentBytes int64 = 65536
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)
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func FetchServerMetadata(
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ctx context.Context,
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client *http.Client,
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issuerBaseURL string,
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) (*ServerMetadata, error) {
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discoveryURL, err := discoveryDocumentURL(issuerBaseURL)
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if err != nil {
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return nil, fmt.Errorf("cannot build discovery document URL: %w", err)
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, discoveryURL, nil)
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if err != nil {
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return nil, fmt.Errorf("cannot create discovery request: %w", err)
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}
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resp, err := client.Do(req)
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if err != nil {
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return nil, fmt.Errorf("cannot fetch discovery document: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("discovery endpoint returned HTTP %d", resp.StatusCode)
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}
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body, err := io.ReadAll(io.LimitReader(resp.Body, maxDiscoveryDocumentBytes))
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if err != nil {
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return nil, fmt.Errorf("cannot read discovery document: %w", err)
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}
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var metadata ServerMetadata
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if err := json.Unmarshal(body, &metadata); err != nil {
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return nil, fmt.Errorf("cannot decode discovery document: %w", err)
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}
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if metadata.AuthorizationEndpoint == "" {
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return nil, fmt.Errorf("discovery document does not advertise an authorization endpoint")
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}
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return &metadata, nil
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}
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func AuthorizationURLWithQuery(
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authorizationEndpoint uri.URI,
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query url.Values,
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) (string, error) {
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u, err := url.Parse(authorizationEndpoint.String())
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if err != nil {
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return "", fmt.Errorf("cannot parse authorization endpoint: %w", err)
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}
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merged := u.Query()
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for key, values := range query {
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for _, value := range values {
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merged.Add(key, value)
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}
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}
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u.RawQuery = merged.Encode()
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return u.String(), nil
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}
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func discoveryDocumentURL(issuerBaseURL string) (string, error) {
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return url.JoinPath(strings.TrimSuffix(issuerBaseURL, "/"), openIDConfigurationPath)
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}
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