mirror of
https://github.com/edgelesssys/constellation.git
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690b50b29d
* Remove unused package * Add Go package docs to most packages Signed-off-by: Daniel Weiße <dw@edgeless.systems> Signed-off-by: Fabian Kammel <fk@edgeless.systems> Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com> Co-authored-by: Paul Meyer <49727155+katexochen@users.noreply.github.com> Co-authored-by: Fabian Kammel <fk@edgeless.systems>
75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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// Package kms handles communication with Constellation's key service to request data encryption keys for new or rejoining nodes.
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package kms
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import (
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"context"
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"fmt"
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"github.com/edgelesssys/constellation/v2/internal/logger"
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"github.com/edgelesssys/constellation/v2/keyservice/keyserviceproto"
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"go.uber.org/zap"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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)
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// Client interacts with Constellation's keyservice.
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type Client struct {
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log *logger.Logger
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endpoint string
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grpc grpcClient
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}
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// New creates a new KMS.
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func New(log *logger.Logger, endpoint string) Client {
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return Client{
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log: log,
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endpoint: endpoint,
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grpc: client{},
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}
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}
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// GetDataKey returns a data encryption key for the given UUID.
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func (c Client) GetDataKey(ctx context.Context, keyID string, length int) ([]byte, error) {
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log := c.log.With(zap.String("keyID", keyID), zap.String("endpoint", c.endpoint))
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// the KMS does not use aTLS since traffic is only routed through the Constellation cluster
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// cluster internal connections are considered trustworthy
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log.Infof("Connecting to KMS at %s", c.endpoint)
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conn, err := grpc.DialContext(ctx, c.endpoint, grpc.WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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return nil, err
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}
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defer conn.Close()
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log.Infof("Requesting data key")
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res, err := c.grpc.GetDataKey(
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ctx,
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&keyserviceproto.GetDataKeyRequest{
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DataKeyId: keyID,
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Length: uint32(length),
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},
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conn,
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)
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if err != nil {
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return nil, fmt.Errorf("fetching data encryption key from Constellation KMS: %w", err)
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}
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log.Infof("Data key request successful")
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return res.DataKey, nil
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}
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type grpcClient interface {
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GetDataKey(context.Context, *keyserviceproto.GetDataKeyRequest, *grpc.ClientConn) (*keyserviceproto.GetDataKeyResponse, error)
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}
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type client struct{}
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func (c client) GetDataKey(ctx context.Context, req *keyserviceproto.GetDataKeyRequest, conn *grpc.ClientConn) (*keyserviceproto.GetDataKeyResponse, error) {
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return keyserviceproto.NewAPIClient(conn).GetDataKey(ctx, req)
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}
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