tokenserver/appengine/impl/serviceaccountsv2/bigquery_log.go

// Copyright 2020 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package serviceaccountsv2

import (
	"context"
	"net"
	"time"

	"go.chromium.org/luci/auth/identity"
	"go.chromium.org/luci/common/proto/google"

	bqpb "go.chromium.org/luci/tokenserver/api/bq"
	"go.chromium.org/luci/tokenserver/api/minter/v1"
	"go.chromium.org/luci/tokenserver/appengine/impl/utils"
	"go.chromium.org/luci/tokenserver/appengine/impl/utils/bq"
)

func init() {
	bq.RegisterTokenKind("service_account_tokens", (*bqpb.ServiceAccountToken)(nil))
}

// MintedTokenInfo is passed to LogToken.
//
// It carries all information about the token minting operation and the produced
// token.
type MintedTokenInfo struct {
	Request         *minter.MintServiceAccountTokenRequest  // RPC input, as is
	Response        *minter.MintServiceAccountTokenResponse // RPC output, as is
	RequestedAt     time.Time
	OAuthScopes     []string          // normalized list of requested OAuth scopes
	RequestIdentity identity.Identity // identity used in authorization
	PeerIdentity    identity.Identity // identity of the direct peer
	ConfigRev       string            // revision of the service config
	PeerIP          net.IP            // caller's IP
	RequestID       string            // GAE request ID that handles the RPC
	AuthDBRev       int64             // revision of the authorization database
}

// toBigQueryMessage returns a message to upload to BigQuery.
func (i *MintedTokenInfo) toBigQueryMessage() *bqpb.ServiceAccountToken {
	return &bqpb.ServiceAccountToken{
		Fingerprint:     utils.TokenFingerprint(i.Response.Token),
		Kind:            i.Request.TokenKind,
		ServiceAccount:  i.Request.ServiceAccount,
		Realm:           i.Request.Realm,
		OauthScopes:     i.OAuthScopes,
		IdTokenAudience: i.Request.IdTokenAudience,
		RequestIdentity: string(i.RequestIdentity),
		PeerIdentity:    string(i.PeerIdentity),
		RequestedAt:     google.NewTimestamp(i.RequestedAt),
		Expiration:      i.Response.Expiry,
		AuditTags:       i.Request.AuditTags,
		ConfigRev:       i.ConfigRev,
		PeerIp:          i.PeerIP.String(),
		ServiceVersion:  i.Response.ServiceVersion,
		GaeRequestId:    i.RequestID,
		AuthDbRev:       i.AuthDBRev,
	}
}

// TokenLogger records info about the token to BigQuery.
type TokenLogger func(context.Context, *MintedTokenInfo) error

// NewTokenLogger returns a callback that records info about tokens to BigQuery.
//
// Tokens themselves are not logged. Only first 16 bytes of their SHA256 hashes
// (aka 'fingerprint') are. They are used only to identify tokens in logs.
//
// When dryRun is true, logs to the local text log only, not to BigQuery
// (to avoid accidentally pushing fake data to real BigQuery dataset).
func NewTokenLogger(dryRun bool) TokenLogger {
	return func(ctx context.Context, i *MintedTokenInfo) error {
		return bq.LogToken(ctx, i.toBigQueryMessage(), dryRun)
	}
}