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85e7af3d5f
* chore(go): update go version to 1.20. Closes #2185 * chore(go): run better align against project To optimize struct field order. Closes #2870 * chore(go): update CI jobs to use Go 1.20 * fix(go): linter warnings for Go 1.20 update
101 lines
2.8 KiB
Go
101 lines
2.8 KiB
Go
package indieauth
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import (
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"fmt"
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"time"
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"github.com/owncast/owncast/core/data"
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"github.com/pkg/errors"
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"github.com/teris-io/shortid"
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)
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// ServerAuthRequest is n inbound request to authenticate against
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// this Owncast instance.
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type ServerAuthRequest struct {
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Timestamp time.Time
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ClientID string
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RedirectURI string
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CodeChallenge string
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State string
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Me string
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Code string
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}
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// ServerProfile represents basic user-provided data about this Owncast instance.
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type ServerProfile struct {
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Name string `json:"name"`
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URL string `json:"url"`
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Photo string `json:"photo"`
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}
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// ServerProfileResponse is returned when an auth flow requests the final
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// confirmation of the IndieAuth flow.
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type ServerProfileResponse struct {
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Me string `json:"me,omitempty"`
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Profile ServerProfile `json:"profile,omitempty"`
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// Error keys need to match the OAuth spec.
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Error string `json:"error,omitempty"`
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ErrorDescription string `json:"error_description,omitempty"`
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}
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var pendingServerAuthRequests = map[string]ServerAuthRequest{}
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const maxPendingRequests = 1000
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// StartServerAuth will handle the authentication for the admin user of this
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// Owncast server. Initiated via a GET of the auth endpoint.
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// https://indieweb.org/authorization-endpoint
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func StartServerAuth(clientID, redirectURI, codeChallenge, state, me string) (*ServerAuthRequest, error) {
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if len(pendingServerAuthRequests)+1 >= maxPendingRequests {
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return nil, errors.New("Please try again later. Too many pending requests.")
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}
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code := shortid.MustGenerate()
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r := ServerAuthRequest{
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ClientID: clientID,
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RedirectURI: redirectURI,
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CodeChallenge: codeChallenge,
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State: state,
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Me: me,
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Code: code,
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Timestamp: time.Now(),
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}
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pendingServerAuthRequests[code] = r
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return &r, nil
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}
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// CompleteServerAuth will verify that the values provided in the final step
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// of the IndieAuth flow are correct, and return some basic profile info.
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func CompleteServerAuth(code, redirectURI, clientID string, codeVerifier string) (*ServerProfileResponse, error) {
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request, pending := pendingServerAuthRequests[code]
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if !pending {
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return nil, errors.New("no pending authentication request")
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}
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if request.RedirectURI != redirectURI {
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return nil, errors.New("redirect URI does not match")
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}
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if request.ClientID != clientID {
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return nil, errors.New("client ID does not match")
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}
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codeChallengeFromRequest := createCodeChallenge(codeVerifier)
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if request.CodeChallenge != codeChallengeFromRequest {
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return nil, errors.New("code verifier is incorrect")
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}
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response := ServerProfileResponse{
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Me: data.GetServerURL(),
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Profile: ServerProfile{
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Name: data.GetServerName(),
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URL: data.GetServerURL(),
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Photo: fmt.Sprintf("%s/%s", data.GetServerURL(), data.GetLogoPath()),
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},
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}
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return &response, nil
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}
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