Files
upstream-ory-kratos/selfservice/strategy/oidc/state.go
upstream-mirror c60cc7ca75
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snapshot of https://github.com/ory/kratos.git (master, 2026-09-15; blobs > 131072B omitted)
2026-09-15 21:19:12 +05:00

92 lines
3.1 KiB
Go

// Copyright © 2024 Ory Corp
// SPDX-License-Identifier: Apache-2.0
package oidc
import (
"context"
"crypto/sha512"
"crypto/subtle"
"golang.org/x/oauth2"
"google.golang.org/protobuf/proto"
"github.com/ory/herodot"
"github.com/ory/kratos/cipher"
oidcv1 "github.com/ory/kratos/gen/oidc/v1"
"github.com/ory/kratos/selfservice/flow"
"github.com/ory/kratos/selfservice/flow/login"
"github.com/ory/kratos/selfservice/flow/registration"
"github.com/ory/kratos/selfservice/flow/settings"
"github.com/ory/kratos/x"
)
func encryptState(ctx context.Context, c cipher.Cipher, state *oidcv1.State) (ciphertext string, err error) {
m, err := proto.Marshal(state)
if err != nil {
return "", herodot.ErrInternalServerError().WithReasonf("Unable to marshal state: %s", err)
}
return c.Encrypt(ctx, m)
}
func DecryptState(ctx context.Context, c cipher.Cipher, ciphertext string) (*oidcv1.State, error) {
plaintext, err := c.Decrypt(ctx, ciphertext)
if err != nil {
return nil, herodot.ErrBadRequest().WithReasonf("Unable to decrypt state: %s", err)
}
var state oidcv1.State
if err := proto.Unmarshal(plaintext, &state); err != nil {
return nil, herodot.ErrBadRequest().WithReasonf("Unable to unmarshal state: %s", err)
}
return &state, nil
}
func (s *Strategy) GenerateState(ctx context.Context, p Provider, fl flow.Flow, requestBaseURL string) (stateParam string, pkce []oauth2.AuthCodeOption, err error) {
// The customer-facing base URL is captured at flow *init* (where the
// proxy / custom-domain headers are present) and stashed on the flow's
// InternalContext. The provider-submit request that reaches here does
// not necessarily carry those headers, so the flow-captured value wins
// over the request-derived fallback. Mirrors the legacy host-rewrite
// webhook, which also captured at flow init.
if ic, ok := fl.(flow.InternalContexter); ok {
if captured := flow.GetRequestBaseURL(ic); captured != "" {
requestBaseURL = captured
}
}
state := oidcv1.State{
FlowId: fl.GetID().Bytes(),
SessionTokenExchangeCodeSha512: x.NewUUID().Bytes(),
ProviderId: p.Config().ID,
PkceVerifier: maybePKCE(ctx, s.d, p),
RequestBaseUrl: requestBaseURL,
}
switch fl.(type) {
case *login.Flow:
state.FlowKind = oidcv1.FlowKind_FLOW_KIND_LOGIN
case *registration.Flow:
state.FlowKind = oidcv1.FlowKind_FLOW_KIND_REGISTRATION
case *settings.Flow:
state.FlowKind = oidcv1.FlowKind_FLOW_KIND_SETTINGS
default:
state.FlowKind = oidcv1.FlowKind_FLOW_KIND_UNSPECIFIED
}
if code, hasCode, _ := s.d.SessionTokenExchangePersister().CodeForFlow(ctx, fl.GetID()); hasCode {
sum := sha512.Sum512([]byte(code.InitCode))
state.SessionTokenExchangeCodeSha512 = sum[:]
}
param, err := encryptState(ctx, s.d.Cipher(ctx), &state)
if err != nil {
return "", nil, herodot.ErrInternalServerError().WithReason("Unable to encrypt state").WithWrap(err)
}
return param, PKCEChallenge(&state), nil
}
func codeMatches(s *oidcv1.State, code string) bool {
sum := sha512.Sum512([]byte(code))
return subtle.ConstantTimeCompare(s.GetSessionTokenExchangeCodeSha512(), sum[:]) == 1
}