mirror of
https://github.com/cloudflare/cloudflared.git
synced 2026-05-14 19:40:41 +00:00
fix: Update go-sentry and go-oidc to address CVE's
This commit is contained in:
+14
-8
@@ -11,7 +11,6 @@ import (
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"io"
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"net/http"
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"sync"
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"time"
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jose "github.com/go-jose/go-jose/v4"
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)
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@@ -57,22 +56,29 @@ func (s *StaticKeySet) VerifySignature(ctx context.Context, jwt string) ([]byte,
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// The returned KeySet is a long lived verifier that caches keys based on any
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// keys change. Reuse a common remote key set instead of creating new ones as needed.
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func NewRemoteKeySet(ctx context.Context, jwksURL string) *RemoteKeySet {
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return newRemoteKeySet(ctx, jwksURL, time.Now)
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return newRemoteKeySet(ctx, jwksURL)
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}
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func newRemoteKeySet(ctx context.Context, jwksURL string, now func() time.Time) *RemoteKeySet {
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if now == nil {
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now = time.Now
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func newRemoteKeySet(ctx context.Context, jwksURL string) *RemoteKeySet {
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return &RemoteKeySet{
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jwksURL: jwksURL,
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// For historical reasons, this package uses contexts for configuration, not just
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// cancellation. In hindsight, this was a bad idea.
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//
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// Attemps to reason about how cancels should work with background requests have
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// largely lead to confusion. Use the context here as a config bag-of-values and
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// ignore the cancel function.
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ctx: context.WithoutCancel(ctx),
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}
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return &RemoteKeySet{jwksURL: jwksURL, ctx: ctx, now: now}
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}
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// RemoteKeySet is a KeySet implementation that validates JSON web tokens against
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// a jwks_uri endpoint.
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type RemoteKeySet struct {
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jwksURL string
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ctx context.Context
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now func() time.Time
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// Used for configuration. Cancelation is ignored.
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ctx context.Context
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// guard all other fields
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mu sync.RWMutex
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+41
-11
@@ -154,40 +154,65 @@ var supportedAlgorithms = map[string]bool{
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EdDSA: true,
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}
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// ProviderConfig allows creating providers when discovery isn't supported. It's
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// generally easier to use NewProvider directly.
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// ProviderConfig allows direct creation of a [Provider] from metadata
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// configuration. This is intended for interop with providers that don't support
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// discovery, or host the JSON discovery document at an off-spec path.
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//
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// The ProviderConfig struct specifies JSON struct tags to support document
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// parsing.
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//
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// // Directly fetch the metadata document.
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// resp, err := http.Get("https://login.example.com/custom-metadata-path")
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// if err != nil {
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// // ...
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// }
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// defer resp.Body.Close()
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//
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// // Parse config from JSON metadata.
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// config := &oidc.ProviderConfig{}
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// if err := json.NewDecoder(resp.Body).Decode(config); err != nil {
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// // ...
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// }
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// p := config.NewProvider(context.Background())
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//
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// For providers that implement discovery, use [NewProvider] instead.
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//
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// See: https://openid.net/specs/openid-connect-discovery-1_0.html
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type ProviderConfig struct {
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// IssuerURL is the identity of the provider, and the string it uses to sign
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// ID tokens with. For example "https://accounts.google.com". This value MUST
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// match ID tokens exactly.
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IssuerURL string
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IssuerURL string `json:"issuer"`
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// AuthURL is the endpoint used by the provider to support the OAuth 2.0
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// authorization endpoint.
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AuthURL string
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AuthURL string `json:"authorization_endpoint"`
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// TokenURL is the endpoint used by the provider to support the OAuth 2.0
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// token endpoint.
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TokenURL string
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TokenURL string `json:"token_endpoint"`
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// DeviceAuthURL is the endpoint used by the provider to support the OAuth 2.0
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// device authorization endpoint.
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DeviceAuthURL string
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DeviceAuthURL string `json:"device_authorization_endpoint"`
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// UserInfoURL is the endpoint used by the provider to support the OpenID
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// Connect UserInfo flow.
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//
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// https://openid.net/specs/openid-connect-core-1_0.html#UserInfo
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UserInfoURL string
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UserInfoURL string `json:"userinfo_endpoint"`
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// JWKSURL is the endpoint used by the provider to advertise public keys to
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// verify issued ID tokens. This endpoint is polled as new keys are made
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// available.
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JWKSURL string
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JWKSURL string `json:"jwks_uri"`
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// Algorithms, if provided, indicate a list of JWT algorithms allowed to sign
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// ID tokens. If not provided, this defaults to the algorithms advertised by
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// the JWK endpoint, then the set of algorithms supported by this package.
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Algorithms []string
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Algorithms []string `json:"id_token_signing_alg_values_supported"`
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}
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// NewProvider initializes a provider from a set of endpoints, rather than
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// through discovery.
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//
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// The provided context is only used for [http.Client] configuration through
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// [ClientContext], not cancelation.
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func (p *ProviderConfig) NewProvider(ctx context.Context) *Provider {
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return &Provider{
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issuer: p.IssuerURL,
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@@ -202,9 +227,14 @@ func (p *ProviderConfig) NewProvider(ctx context.Context) *Provider {
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}
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// NewProvider uses the OpenID Connect discovery mechanism to construct a Provider.
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//
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// The issuer is the URL identifier for the service. For example: "https://accounts.google.com"
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// or "https://login.salesforce.com".
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//
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// OpenID Connect providers that don't implement discovery or host the discovery
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// document at a non-spec complaint path (such as requiring a URL parameter),
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// should use [ProviderConfig] instead.
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//
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// See: https://openid.net/specs/openid-connect-discovery-1_0.html
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func NewProvider(ctx context.Context, issuer string) (*Provider, error) {
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wellKnown := strings.TrimSuffix(issuer, "/") + "/.well-known/openid-configuration"
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req, err := http.NewRequest("GET", wellKnown, nil)
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@@ -237,7 +267,7 @@ func NewProvider(ctx context.Context, issuer string) (*Provider, error) {
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issuerURL = issuer
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}
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if p.Issuer != issuerURL && !skipIssuerValidation {
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return nil, fmt.Errorf("oidc: issuer did not match the issuer returned by provider, expected %q got %q", issuer, p.Issuer)
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return nil, fmt.Errorf("oidc: issuer URL provided to client (%q) did not match the issuer URL returned by provider (%q)", issuer, p.Issuer)
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}
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var algs []string
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for _, a := range p.Algorithms {
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+43
-60
@@ -1,15 +1,11 @@
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package oidc
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import (
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"bytes"
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"context"
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"encoding/base64"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"strings"
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"time"
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jose "github.com/go-jose/go-jose/v4"
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@@ -120,8 +116,8 @@ type Config struct {
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}
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// VerifierContext returns an IDTokenVerifier that uses the provider's key set to
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// verify JWTs. As opposed to Verifier, the context is used for all requests to
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// the upstream JWKs endpoint.
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// verify JWTs. As opposed to Verifier, the context is used to configure requests
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// to the upstream JWKs endpoint. The provided context's cancellation is ignored.
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func (p *Provider) VerifierContext(ctx context.Context, config *Config) *IDTokenVerifier {
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return p.newVerifier(NewRemoteKeySet(ctx, p.jwksURL), config)
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}
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@@ -145,18 +141,6 @@ func (p *Provider) newVerifier(keySet KeySet, config *Config) *IDTokenVerifier {
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return NewVerifier(p.issuer, keySet, config)
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}
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func parseJWT(p string) ([]byte, error) {
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parts := strings.Split(p, ".")
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if len(parts) < 2 {
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return nil, fmt.Errorf("oidc: malformed jwt, expected 3 parts got %d", len(parts))
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}
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payload, err := base64.RawURLEncoding.DecodeString(parts[1])
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if err != nil {
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return nil, fmt.Errorf("oidc: malformed jwt payload: %v", err)
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}
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return payload, nil
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}
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func contains(sli []string, ele string) bool {
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for _, s := range sli {
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if s == ele {
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@@ -219,12 +203,49 @@ func resolveDistributedClaim(ctx context.Context, verifier *IDTokenVerifier, src
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//
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// token, err := verifier.Verify(ctx, rawIDToken)
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func (v *IDTokenVerifier) Verify(ctx context.Context, rawIDToken string) (*IDToken, error) {
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// Throw out tokens with invalid claims before trying to verify the token. This lets
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// us do cheap checks before possibly re-syncing keys.
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payload, err := parseJWT(rawIDToken)
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var supportedSigAlgs []jose.SignatureAlgorithm
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for _, alg := range v.config.SupportedSigningAlgs {
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supportedSigAlgs = append(supportedSigAlgs, jose.SignatureAlgorithm(alg))
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}
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if len(supportedSigAlgs) == 0 {
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// If no algorithms were specified by both the config and discovery, default
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// to the one mandatory algorithm "RS256".
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supportedSigAlgs = []jose.SignatureAlgorithm{jose.RS256}
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}
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if v.config.InsecureSkipSignatureCheck {
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// "none" is a required value to even parse a JWT with the "none" algorithm
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// using go-jose.
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supportedSigAlgs = append(supportedSigAlgs, "none")
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}
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// Parse and verify the signature first. This at least forces the user to have
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// a valid, signed ID token before we do any other processing.
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jws, err := jose.ParseSigned(rawIDToken, supportedSigAlgs)
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if err != nil {
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return nil, fmt.Errorf("oidc: malformed jwt: %v", err)
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}
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switch len(jws.Signatures) {
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case 0:
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return nil, fmt.Errorf("oidc: id token not signed")
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case 1:
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default:
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return nil, fmt.Errorf("oidc: multiple signatures on id token not supported")
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}
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sig := jws.Signatures[0]
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var payload []byte
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if v.config.InsecureSkipSignatureCheck {
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// Yolo mode.
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payload = jws.UnsafePayloadWithoutVerification()
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} else {
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// The JWT is attached here for the happy path to avoid the verifier from
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// having to parse the JWT twice.
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ctx = context.WithValue(ctx, parsedJWTKey, jws)
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payload, err = v.keySet.VerifySignature(ctx, rawIDToken)
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if err != nil {
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return nil, fmt.Errorf("failed to verify signature: %v", err)
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}
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}
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var token idToken
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if err := json.Unmarshal(payload, &token); err != nil {
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return nil, fmt.Errorf("oidc: failed to unmarshal claims: %v", err)
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@@ -254,6 +275,7 @@ func (v *IDTokenVerifier) Verify(ctx context.Context, rawIDToken string) (*IDTok
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AccessTokenHash: token.AtHash,
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claims: payload,
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distributedClaims: distributedClaims,
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sigAlgorithm: sig.Header.Algorithm,
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}
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// Check issuer.
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@@ -306,45 +328,6 @@ func (v *IDTokenVerifier) Verify(ctx context.Context, rawIDToken string) (*IDTok
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}
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}
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if v.config.InsecureSkipSignatureCheck {
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return t, nil
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}
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var supportedSigAlgs []jose.SignatureAlgorithm
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for _, alg := range v.config.SupportedSigningAlgs {
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supportedSigAlgs = append(supportedSigAlgs, jose.SignatureAlgorithm(alg))
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}
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if len(supportedSigAlgs) == 0 {
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// If no algorithms were specified by both the config and discovery, default
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// to the one mandatory algorithm "RS256".
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supportedSigAlgs = []jose.SignatureAlgorithm{jose.RS256}
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}
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jws, err := jose.ParseSigned(rawIDToken, supportedSigAlgs)
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if err != nil {
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return nil, fmt.Errorf("oidc: malformed jwt: %v", err)
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}
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switch len(jws.Signatures) {
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case 0:
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return nil, fmt.Errorf("oidc: id token not signed")
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case 1:
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default:
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return nil, fmt.Errorf("oidc: multiple signatures on id token not supported")
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}
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sig := jws.Signatures[0]
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t.sigAlgorithm = sig.Header.Algorithm
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ctx = context.WithValue(ctx, parsedJWTKey, jws)
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gotPayload, err := v.keySet.VerifySignature(ctx, rawIDToken)
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if err != nil {
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return nil, fmt.Errorf("failed to verify signature: %v", err)
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}
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// Ensure that the payload returned by the square actually matches the payload parsed earlier.
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if !bytes.Equal(gotPayload, payload) {
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return nil, errors.New("oidc: internal error, payload parsed did not match previous payload")
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}
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return t, nil
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}
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