mirror of https://github.com/hashicorp/consul
257 lines
7.2 KiB
Go
257 lines
7.2 KiB
Go
// Copyright (c) HashiCorp, Inc.
|
|
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
package oidcauth
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"crypto/x509"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/hashicorp/go-cleanhttp"
|
|
"github.com/hashicorp/go-hclog"
|
|
"github.com/mitchellh/pointerstructure"
|
|
"golang.org/x/oauth2"
|
|
|
|
"github.com/hashicorp/consul/internal/go-sso/oidcauth/internal/strutil"
|
|
)
|
|
|
|
func contextWithHttpClient(ctx context.Context, client *http.Client) context.Context {
|
|
return context.WithValue(ctx, oauth2.HTTPClient, client)
|
|
}
|
|
|
|
func createHTTPClient(caCert string) (*http.Client, error) {
|
|
tr := cleanhttp.DefaultPooledTransport()
|
|
|
|
if caCert != "" {
|
|
certPool := x509.NewCertPool()
|
|
if ok := certPool.AppendCertsFromPEM([]byte(caCert)); !ok {
|
|
return nil, errors.New("could not parse CA PEM value successfully")
|
|
}
|
|
|
|
tr.TLSClientConfig = &tls.Config{
|
|
RootCAs: certPool,
|
|
}
|
|
}
|
|
|
|
return &http.Client{
|
|
Transport: tr,
|
|
}, nil
|
|
}
|
|
|
|
// extractClaims extracts all configured claims from the received claims.
|
|
func (a *Authenticator) extractClaims(allClaims map[string]interface{}) (*Claims, error) {
|
|
metadata, err := extractStringMetadata(a.logger, allClaims, a.config.ClaimMappings)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
listMetadata, err := extractListMetadata(a.logger, allClaims, a.config.ListClaimMappings)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &Claims{
|
|
Values: metadata,
|
|
Lists: listMetadata,
|
|
}, nil
|
|
}
|
|
|
|
// extractStringMetadata builds a metadata map of string values from a set of
|
|
// claims and claims mappings. The referenced claims must be strings and the
|
|
// claims mappings must be of the structure:
|
|
//
|
|
// {
|
|
// "/some/claim/pointer": "metadata_key1",
|
|
// "another_claim": "metadata_key2",
|
|
// ...
|
|
// }
|
|
func extractStringMetadata(logger hclog.Logger, allClaims map[string]interface{}, claimMappings map[string]string) (map[string]string, error) {
|
|
metadata := make(map[string]string)
|
|
for source, target := range claimMappings {
|
|
rawValue := getClaim(logger, allClaims, source)
|
|
if rawValue == nil {
|
|
continue
|
|
}
|
|
|
|
strValue, ok := stringifyMetadataValue(rawValue)
|
|
if !ok {
|
|
return nil, fmt.Errorf("error converting claim '%s' to string from unknown type %T", source, rawValue)
|
|
}
|
|
|
|
metadata[target] = strValue
|
|
}
|
|
return metadata, nil
|
|
}
|
|
|
|
// extractListMetadata builds a metadata map of string list values from a set
|
|
// of claims and claims mappings. The referenced claims must be strings and
|
|
// the claims mappings must be of the structure:
|
|
//
|
|
// {
|
|
// "/some/claim/pointer": "metadata_key1",
|
|
// "another_claim": "metadata_key2",
|
|
// ...
|
|
// }
|
|
func extractListMetadata(logger hclog.Logger, allClaims map[string]interface{}, listClaimMappings map[string]string) (map[string][]string, error) {
|
|
out := make(map[string][]string)
|
|
for source, target := range listClaimMappings {
|
|
if rawValue := getClaim(logger, allClaims, source); rawValue != nil {
|
|
rawList, ok := normalizeList(rawValue)
|
|
if !ok {
|
|
return nil, fmt.Errorf("%q list claim could not be converted to string list", source)
|
|
}
|
|
|
|
list := make([]string, 0, len(rawList))
|
|
for _, raw := range rawList {
|
|
value, ok := stringifyMetadataValue(raw)
|
|
if !ok {
|
|
return nil, fmt.Errorf("value %v in %q list claim could not be parsed as string", raw, source)
|
|
}
|
|
|
|
if value == "" {
|
|
continue
|
|
}
|
|
list = append(list, value)
|
|
}
|
|
|
|
out[target] = list
|
|
}
|
|
}
|
|
return out, nil
|
|
}
|
|
|
|
// getClaim returns a claim value from allClaims given a provided claim string.
|
|
// If this string is a valid JSONPointer, it will be interpreted as such to
|
|
// locate the claim. Otherwise, the claim string will be used directly.
|
|
//
|
|
// There is no fixup done to the returned data type here. That happens a layer
|
|
// up in the caller.
|
|
func getClaim(logger hclog.Logger, allClaims map[string]interface{}, claim string) interface{} {
|
|
if !strings.HasPrefix(claim, "/") {
|
|
return allClaims[claim]
|
|
}
|
|
|
|
val, err := pointerstructure.Get(allClaims, claim)
|
|
if err != nil {
|
|
if logger != nil {
|
|
logger.Warn("unable to locate claim", "claim", claim, "error", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
return val
|
|
}
|
|
|
|
// normalizeList takes an item or a slice and returns a slice. This is useful
|
|
// when providers are expected to return a list (typically of strings) but
|
|
// reduce it to a non-slice type when the list count is 1.
|
|
//
|
|
// There is no fixup done to elements of the returned slice here. That happens
|
|
// a layer up in the caller.
|
|
func normalizeList(raw interface{}) ([]interface{}, bool) {
|
|
switch v := raw.(type) {
|
|
case []interface{}:
|
|
return v, true
|
|
case string, // note: this list should be the same as stringifyMetadataValue
|
|
bool,
|
|
json.Number,
|
|
float64,
|
|
float32,
|
|
int8,
|
|
int16,
|
|
int32,
|
|
int64,
|
|
int,
|
|
uint8,
|
|
uint16,
|
|
uint32,
|
|
uint64,
|
|
uint:
|
|
return []interface{}{v}, true
|
|
default:
|
|
return nil, false
|
|
}
|
|
|
|
}
|
|
|
|
// stringifyMetadataValue will try to convert the provided raw value into a
|
|
// faithful string representation of that value per these rules:
|
|
//
|
|
// - strings => unchanged
|
|
// - bool => "true" / "false"
|
|
// - json.Number => String()
|
|
// - float32/64 => truncated to int64 and then formatted as an ascii string
|
|
// - intXX/uintXX => casted to int64 and then formatted as an ascii string
|
|
//
|
|
// If successful the string value and true are returned. otherwise an empty
|
|
// string and false are returned.
|
|
func stringifyMetadataValue(rawValue interface{}) (string, bool) {
|
|
switch v := rawValue.(type) {
|
|
case string:
|
|
return v, true
|
|
case bool:
|
|
return strconv.FormatBool(v), true
|
|
case json.Number:
|
|
return v.String(), true
|
|
case float64:
|
|
// The claims unmarshalled by go-oidc don't use UseNumber, so
|
|
// they'll come in as float64 instead of an integer or json.Number.
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
|
|
// The numerical type cases following here are only here for the sake
|
|
// of numerical type completion. Everything is truncated to an integer
|
|
// before being stringified.
|
|
case float32:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case int8:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case int16:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case int32:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case int64:
|
|
return strconv.FormatInt(v, 10), true
|
|
case int:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case uint8:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case uint16:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case uint32:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case uint64:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
case uint:
|
|
return strconv.FormatInt(int64(v), 10), true
|
|
default:
|
|
return "", false
|
|
}
|
|
}
|
|
|
|
// validateAudience checks whether any of the audiences in audClaim match those
|
|
// in boundAudiences. If strict is true and there are no bound audiences, then
|
|
// the presence of any audience in the received claim is considered an error.
|
|
func validateAudience(boundAudiences, audClaim []string, strict bool) error {
|
|
if strict && len(boundAudiences) == 0 && len(audClaim) > 0 {
|
|
return errors.New("audience claim found in JWT but no audiences are bound")
|
|
}
|
|
|
|
if len(boundAudiences) > 0 {
|
|
for _, v := range boundAudiences {
|
|
if strutil.StrListContains(audClaim, v) {
|
|
return nil
|
|
}
|
|
}
|
|
return errors.New("aud claim does not match any bound audience")
|
|
}
|
|
|
|
return nil
|
|
}
|