112 lines
3.1 KiB
Go
112 lines
3.1 KiB
Go
package autoconf
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import (
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"context"
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"fmt"
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"net"
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"strings"
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"github.com/hashicorp/consul/agent/structs"
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)
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func (ac *AutoConfig) autoEncryptInitialCerts(ctx context.Context) (*structs.SignedResponse, error) {
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// generate a CSR
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csr, key, err := ac.generateCSR()
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if err != nil {
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return nil, err
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}
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// this resets the failures so that we will perform immediate request
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wait := ac.acConfig.Waiter.Success()
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for {
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select {
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case <-wait:
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if resp, err := ac.autoEncryptInitialCertsOnce(ctx, csr, key); err == nil && resp != nil {
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return resp, nil
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} else if err != nil {
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ac.logger.Error(err.Error())
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} else {
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ac.logger.Error("No error returned when fetching certificates from the servers but no response was either")
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}
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wait = ac.acConfig.Waiter.Failed()
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case <-ctx.Done():
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ac.logger.Info("interrupted during retrieval of auto-encrypt certificates", "err", ctx.Err())
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return nil, ctx.Err()
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}
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}
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}
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func (ac *AutoConfig) autoEncryptInitialCertsOnce(ctx context.Context, csr, key string) (*structs.SignedResponse, error) {
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request := structs.CASignRequest{
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WriteRequest: structs.WriteRequest{Token: ac.acConfig.Tokens.AgentToken()},
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Datacenter: ac.config.Datacenter,
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CSR: csr,
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}
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var resp structs.SignedResponse
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servers, err := ac.autoEncryptHosts()
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if err != nil {
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return nil, err
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}
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for _, s := range servers {
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// try each IP to see if we can successfully make the request
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for _, addr := range ac.resolveHost(s) {
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if ctx.Err() != nil {
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return nil, ctx.Err()
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}
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ac.logger.Debug("making AutoEncrypt.Sign RPC", "addr", addr.String())
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err = ac.acConfig.DirectRPC.RPC(ac.config.Datacenter, ac.config.NodeName, &addr, "AutoEncrypt.Sign", &request, &resp)
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if err != nil {
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ac.logger.Error("AutoEncrypt.Sign RPC failed", "addr", addr.String(), "error", err)
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continue
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}
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resp.IssuedCert.PrivateKeyPEM = key
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return &resp, nil
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}
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}
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return nil, fmt.Errorf("No servers successfully responded to the auto-encrypt request")
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}
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func (ac *AutoConfig) autoEncryptHosts() ([]string, error) {
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// use servers known to gossip if there are any
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if ac.acConfig.ServerProvider != nil {
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if srv := ac.acConfig.ServerProvider.FindLANServer(); srv != nil {
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return []string{srv.Addr.String()}, nil
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}
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}
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hosts, err := ac.discoverServers(ac.config.RetryJoinLAN)
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if err != nil {
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return nil, err
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}
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var addrs []string
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// The addresses we use for auto-encrypt are the retry join and start join
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// addresses. These are for joining serf and therefore we cannot rely on the
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// ports for these. This loop strips any port that may have been specified and
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// will let subsequent resolveAddr calls add on the default RPC port.
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for _, addr := range append(ac.config.StartJoinAddrsLAN, hosts...) {
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host, _, err := net.SplitHostPort(addr)
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if err != nil {
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if strings.Contains(err.Error(), "missing port in address") {
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host = addr
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} else {
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ac.logger.Warn("error splitting host address into IP and port", "address", addr, "error", err)
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continue
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}
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}
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addrs = append(addrs, host)
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}
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if len(addrs) == 0 {
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return nil, fmt.Errorf("no auto-encrypt server addresses available for use")
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}
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return addrs, nil
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}
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