213 lines
6.3 KiB
Go
213 lines
6.3 KiB
Go
package http
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import (
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"errors"
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"net/http"
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"strings"
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"source.toby3d.me/toby3d/auth/internal/domain"
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"source.toby3d.me/toby3d/form"
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)
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type (
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AuthAuthorizationRequest struct {
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// Indicates to the authorization server that an authorization
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// code should be returned as the response.
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ResponseType domain.ResponseType `form:"response_type"` // code
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// The client URL.
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ClientID domain.ClientID `form:"client_id"`
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// The redirect URL indicating where the user should be
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// redirected to after approving the request.
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RedirectURI domain.URL `form:"redirect_uri"`
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// The URL that the user entered.
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Me domain.Me `form:"me"`
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// The hashing method used to calculate the code challenge.
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CodeChallengeMethod *domain.CodeChallengeMethod `form:"code_challenge_method,omitempty"`
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// A space-separated list of scopes the client is requesting,
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// e.g. "profile", or "profile create". If the client omits this
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// value, the authorization server MUST NOT issue an access
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// token for this authorization code. Only the user's profile
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// URL may be returned without any scope requested.
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Scope domain.Scopes `form:"scope,omitempty"`
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// A parameter set by the client which will be included when the
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// user is redirected back to the client. This is used to
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// prevent CSRF attacks. The authorization server MUST return
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// the unmodified state value back to the client.
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State string `form:"state"`
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// The code challenge as previously described.
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CodeChallenge string `form:"code_challenge,omitempty"`
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}
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AuthVerifyRequest struct {
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ClientID domain.ClientID `form:"client_id"`
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Me domain.Me `form:"me"`
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RedirectURI domain.URL `form:"redirect_uri"`
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ResponseType domain.ResponseType `form:"response_type"`
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CodeChallengeMethod *domain.CodeChallengeMethod `form:"code_challenge_method,omitempty"`
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Scope domain.Scopes `form:"scope[],omitempty"`
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Authorize string `form:"authorize"`
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CodeChallenge string `form:"code_challenge,omitempty"`
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State string `form:"state"`
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Provider string `form:"provider"`
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}
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AuthExchangeRequest struct {
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GrantType domain.GrantType `form:"grant_type"` // authorization_code
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// The client's URL, which MUST match the client_id used in the
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// authentication request.
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ClientID domain.ClientID `form:"client_id"`
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// The client's redirect URL, which MUST match the initial
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// authentication request.
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RedirectURI domain.URL `form:"redirect_uri"`
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// The authorization code received from the authorization
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// endpoint in the redirect.
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Code string `form:"code"`
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// The original plaintext random string generated before
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// starting the authorization request.
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CodeVerifier string `form:"code_verifier"`
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}
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AuthExchangeResponse struct {
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Me domain.Me `json:"me"`
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Profile *AuthProfileResponse `json:"profile,omitempty"`
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}
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AuthProfileResponse struct {
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Email *domain.Email `json:"email,omitempty"`
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Photo *domain.URL `json:"photo,omitempty"`
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URL *domain.URL `json:"url,omitempty"`
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Name string `json:"name,omitempty"`
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}
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)
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func NewAuthAuthorizationRequest() *AuthAuthorizationRequest {
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return &AuthAuthorizationRequest{
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ClientID: domain.ClientID{},
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CodeChallenge: "",
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CodeChallengeMethod: &domain.CodeChallengeMethodUnd,
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Me: domain.Me{},
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RedirectURI: domain.URL{},
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ResponseType: domain.ResponseTypeUnd,
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Scope: make(domain.Scopes, 0),
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State: "",
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}
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}
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//nolint:cyclop
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func (r *AuthAuthorizationRequest) bind(req *http.Request) error {
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indieAuthError := new(domain.Error)
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if err := form.Unmarshal([]byte(req.URL.Query().Encode()), r); err != nil {
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if errors.As(err, indieAuthError) {
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return indieAuthError
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}
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return domain.NewError(
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domain.ErrorCodeInvalidRequest,
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err.Error(),
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"https://indieauth.net/source/#authorization-request",
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)
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}
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if r.ResponseType == domain.ResponseTypeID {
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r.ResponseType = domain.ResponseTypeCode
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}
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return nil
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}
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func NewAuthVerifyRequest() *AuthVerifyRequest {
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return &AuthVerifyRequest{
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Authorize: "",
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ClientID: domain.ClientID{},
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CodeChallenge: "",
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CodeChallengeMethod: &domain.CodeChallengeMethodUnd,
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Me: domain.Me{},
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Provider: "",
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RedirectURI: domain.URL{},
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ResponseType: domain.ResponseTypeUnd,
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Scope: make(domain.Scopes, 0),
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State: "",
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}
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}
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//nolint:funlen,cyclop
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func (r *AuthVerifyRequest) bind(req *http.Request) error {
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indieAuthError := new(domain.Error)
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if err := req.ParseForm(); err != nil {
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return domain.NewError(
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domain.ErrorCodeInvalidRequest,
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err.Error(),
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"https://indieauth.net/source/#authorization-request",
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)
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}
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if err := form.Unmarshal([]byte(req.PostForm.Encode()), r); err != nil {
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if errors.As(err, indieAuthError) {
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return indieAuthError
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}
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return domain.NewError(
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domain.ErrorCodeInvalidRequest,
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err.Error(),
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"https://indieauth.net/source/#authorization-request",
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)
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}
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// NOTE(toby3d): backwards-compatible support.
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// See: https://aaronparecki.com/2020/12/03/1/indieauth-2020#response-type
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if r.ResponseType == domain.ResponseTypeID {
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r.ResponseType = domain.ResponseTypeCode
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}
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r.Provider = strings.ToLower(r.Provider)
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if !strings.EqualFold(r.Authorize, "allow") && !strings.EqualFold(r.Authorize, "deny") {
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return domain.NewError(
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domain.ErrorCodeInvalidRequest,
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"cannot validate verification request",
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"https://indieauth.net/source/#authorization-request",
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)
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}
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return nil
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}
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func (r *AuthExchangeRequest) bind(req *http.Request) error {
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indieAuthError := new(domain.Error)
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if err := req.ParseForm(); err != nil {
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return domain.NewError(
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domain.ErrorCodeInvalidRequest,
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err.Error(),
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"https://indieauth.net/source/#authorization-request",
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)
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}
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if err := form.Unmarshal([]byte(req.PostForm.Encode()), r); err != nil {
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if errors.As(err, indieAuthError) {
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return indieAuthError
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}
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return domain.NewError(
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domain.ErrorCodeInvalidRequest,
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"cannot validate verification request",
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"https://indieauth.net/source/#redeeming-the-authorization-code",
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)
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}
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return nil
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}
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