mirror of
https://github.com/edgelesssys/constellation.git
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78 lines
2.3 KiB
Go
78 lines
2.3 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 dialer
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import (
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"context"
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"net"
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"github.com/edgelesssys/constellation/v2/internal/atls"
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"github.com/edgelesssys/constellation/v2/internal/grpc/atlscredentials"
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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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// Dialer can open grpc client connections with different levels of ATLS encryption / verification.
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type Dialer struct {
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issuer atls.Issuer
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validator atls.Validator
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netDialer NetDialer
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}
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// New creates a new Dialer.
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func New(issuer atls.Issuer, validator atls.Validator, netDialer NetDialer) *Dialer {
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return &Dialer{
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issuer: issuer,
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validator: validator,
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netDialer: netDialer,
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}
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}
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// Dial creates a new grpc client connection to the given target using the atls validator.
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func (d *Dialer) Dial(ctx context.Context, target string) (*grpc.ClientConn, error) {
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var validators []atls.Validator
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if d.validator != nil {
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validators = append(validators, d.validator)
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}
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credentials := atlscredentials.New(d.issuer, validators)
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return grpc.DialContext(ctx, target,
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d.grpcWithDialer(),
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grpc.WithTransportCredentials(credentials),
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)
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}
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// DialInsecure creates a new grpc client connection to the given target without using encryption or verification.
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// Only use this method when using another kind of encryption / verification (VPN, etc).
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func (d *Dialer) DialInsecure(ctx context.Context, target string) (*grpc.ClientConn, error) {
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return grpc.DialContext(ctx, target,
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d.grpcWithDialer(),
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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)
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}
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// DialNoVerify creates a new grpc client connection to the given target without verifying the server's attestation.
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func (d *Dialer) DialNoVerify(ctx context.Context, target string) (*grpc.ClientConn, error) {
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credentials := atlscredentials.New(nil, nil)
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return grpc.DialContext(ctx, target,
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d.grpcWithDialer(),
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grpc.WithTransportCredentials(credentials),
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)
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}
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func (d *Dialer) grpcWithDialer() grpc.DialOption {
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return grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) {
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return d.netDialer.DialContext(ctx, "tcp", addr)
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})
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}
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// NetDialer implements the net Dialer interface.
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type NetDialer interface {
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DialContext(ctx context.Context, network, address string) (net.Conn, error)
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}
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