646 lines
18 KiB
Go
646 lines
18 KiB
Go
package consul
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import (
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"os"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"github.com/hashicorp/consul/agent/connect"
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ca "github.com/hashicorp/consul/agent/connect/ca"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/testrpc"
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"github.com/hashicorp/consul/testutil/retry"
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"github.com/hashicorp/net-rpc-msgpackrpc"
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"github.com/stretchr/testify/assert"
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)
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func testParseCert(t *testing.T, pemValue string) *x509.Certificate {
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cert, err := connect.ParseCert(pemValue)
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if err != nil {
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t.Fatal(err)
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}
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return cert
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}
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// Test listing root CAs.
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func TestConnectCARoots(t *testing.T) {
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t.Parallel()
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assert := assert.New(t)
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require := require.New(t)
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testrpc.WaitForTestAgent(t, s1.RPC, "dc1")
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// Insert some CAs
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state := s1.fsm.State()
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ca1 := connect.TestCA(t, nil)
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ca2 := connect.TestCA(t, nil)
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ca2.Active = false
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idx, _, err := state.CARoots(nil)
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require.NoError(err)
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ok, err := state.CARootSetCAS(idx, idx, []*structs.CARoot{ca1, ca2})
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assert.True(ok)
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require.NoError(err)
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_, caCfg, err := state.CAConfig()
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require.NoError(err)
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// Request
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args := &structs.DCSpecificRequest{
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Datacenter: "dc1",
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}
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var reply structs.IndexedCARoots
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require.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.Roots", args, &reply))
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// Verify
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assert.Equal(ca1.ID, reply.ActiveRootID)
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assert.Len(reply.Roots, 2)
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for _, r := range reply.Roots {
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// These must never be set, for security
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assert.Equal("", r.SigningCert)
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assert.Equal("", r.SigningKey)
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}
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assert.Equal(fmt.Sprintf("%s.consul", caCfg.ClusterID), reply.TrustDomain)
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}
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func TestConnectCAConfig_GetSet(t *testing.T) {
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t.Parallel()
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assert := assert.New(t)
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testrpc.WaitForTestAgent(t, s1.RPC, "dc1")
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// Get the starting config
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{
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args := &structs.DCSpecificRequest{
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Datacenter: "dc1",
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}
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var reply structs.CAConfiguration
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assert.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.ConfigurationGet", args, &reply))
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actual, err := ca.ParseConsulCAConfig(reply.Config)
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assert.NoError(err)
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expected, err := ca.ParseConsulCAConfig(s1.config.CAConfig.Config)
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assert.NoError(err)
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assert.Equal(reply.Provider, s1.config.CAConfig.Provider)
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assert.Equal(actual, expected)
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}
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// Update a config value
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newConfig := &structs.CAConfiguration{
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Provider: "consul",
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Config: map[string]interface{}{
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"PrivateKey": "",
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"RootCert": "",
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"RotationPeriod": 180 * 24 * time.Hour,
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},
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}
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{
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args := &structs.CARequest{
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Datacenter: "dc1",
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Config: newConfig,
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}
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var reply interface{}
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retry.Run(t, func(r *retry.R) {
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r.Check(msgpackrpc.CallWithCodec(codec, "ConnectCA.ConfigurationSet", args, &reply))
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})
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}
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// Verify the new config was set
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{
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args := &structs.DCSpecificRequest{
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Datacenter: "dc1",
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}
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var reply structs.CAConfiguration
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assert.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.ConfigurationGet", args, &reply))
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actual, err := ca.ParseConsulCAConfig(reply.Config)
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assert.NoError(err)
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expected, err := ca.ParseConsulCAConfig(newConfig.Config)
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assert.NoError(err)
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assert.Equal(reply.Provider, newConfig.Provider)
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assert.Equal(actual, expected)
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}
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}
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func TestConnectCAConfig_TriggerRotation(t *testing.T) {
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t.Parallel()
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assert := assert.New(t)
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require := require.New(t)
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testrpc.WaitForTestAgent(t, s1.RPC, "dc1")
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// Store the current root
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rootReq := &structs.DCSpecificRequest{
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Datacenter: "dc1",
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}
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var rootList structs.IndexedCARoots
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require.Nil(msgpackrpc.CallWithCodec(codec, "ConnectCA.Roots", rootReq, &rootList))
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assert.Len(rootList.Roots, 1)
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oldRoot := rootList.Roots[0]
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// Update the provider config to use a new private key, which should
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// cause a rotation.
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_, newKey, err := connect.GeneratePrivateKey()
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assert.NoError(err)
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newConfig := &structs.CAConfiguration{
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Provider: "consul",
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Config: map[string]interface{}{
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"PrivateKey": newKey,
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"RootCert": "",
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"RotationPeriod": 90 * 24 * time.Hour,
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},
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}
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{
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args := &structs.CARequest{
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Datacenter: "dc1",
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Config: newConfig,
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}
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var reply interface{}
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require.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.ConfigurationSet", args, &reply))
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}
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// Make sure the new root has been added along with an intermediate
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// cross-signed by the old root.
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var newRootPEM string
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{
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args := &structs.DCSpecificRequest{
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Datacenter: "dc1",
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}
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var reply structs.IndexedCARoots
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require.Nil(msgpackrpc.CallWithCodec(codec, "ConnectCA.Roots", args, &reply))
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assert.Len(reply.Roots, 2)
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for _, r := range reply.Roots {
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if r.ID == oldRoot.ID {
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// The old root should no longer be marked as the active root,
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// and none of its other fields should have changed.
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assert.False(r.Active)
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assert.Equal(r.Name, oldRoot.Name)
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assert.Equal(r.RootCert, oldRoot.RootCert)
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assert.Equal(r.SigningCert, oldRoot.SigningCert)
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assert.Equal(r.IntermediateCerts, oldRoot.IntermediateCerts)
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} else {
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newRootPEM = r.RootCert
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// The new root should have a valid cross-signed cert from the old
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// root as an intermediate.
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assert.True(r.Active)
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assert.Len(r.IntermediateCerts, 1)
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xc := testParseCert(t, r.IntermediateCerts[0])
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oldRootCert := testParseCert(t, oldRoot.RootCert)
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newRootCert := testParseCert(t, r.RootCert)
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// Should have the authority key ID and signature algo of the
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// (old) signing CA.
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assert.Equal(xc.AuthorityKeyId, oldRootCert.AuthorityKeyId)
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assert.NotEqual(xc.SubjectKeyId, oldRootCert.SubjectKeyId)
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assert.Equal(xc.SignatureAlgorithm, oldRootCert.SignatureAlgorithm)
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// The common name and SAN should not have changed.
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assert.Equal(xc.Subject.CommonName, newRootCert.Subject.CommonName)
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assert.Equal(xc.URIs, newRootCert.URIs)
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}
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}
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}
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// Verify the new config was set.
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{
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args := &structs.DCSpecificRequest{
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Datacenter: "dc1",
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}
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var reply structs.CAConfiguration
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require.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.ConfigurationGet", args, &reply))
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actual, err := ca.ParseConsulCAConfig(reply.Config)
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require.NoError(err)
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expected, err := ca.ParseConsulCAConfig(newConfig.Config)
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require.NoError(err)
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assert.Equal(reply.Provider, newConfig.Provider)
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assert.Equal(actual, expected)
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}
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// Verify that new leaf certs get the cross-signed intermediate bundled
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{
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// Generate a CSR and request signing
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spiffeId := connect.TestSpiffeIDService(t, "web")
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csr, _ := connect.TestCSR(t, spiffeId)
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args := &structs.CASignRequest{
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Datacenter: "dc1",
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CSR: csr,
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}
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var reply structs.IssuedCert
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require.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.Sign", args, &reply))
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// Verify that the cert is signed by the new CA
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{
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roots := x509.NewCertPool()
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require.True(roots.AppendCertsFromPEM([]byte(newRootPEM)))
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leaf, err := connect.ParseCert(reply.CertPEM)
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require.NoError(err)
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_, err = leaf.Verify(x509.VerifyOptions{
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Roots: roots,
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})
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require.NoError(err)
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}
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// And that it validates via the intermediate
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{
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roots := x509.NewCertPool()
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assert.True(roots.AppendCertsFromPEM([]byte(oldRoot.RootCert)))
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leaf, err := connect.ParseCert(reply.CertPEM)
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require.NoError(err)
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// Make sure the intermediate was returned as well as leaf
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_, rest := pem.Decode([]byte(reply.CertPEM))
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require.NotEmpty(rest)
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intermediates := x509.NewCertPool()
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require.True(intermediates.AppendCertsFromPEM(rest))
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_, err = leaf.Verify(x509.VerifyOptions{
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Roots: roots,
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Intermediates: intermediates,
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})
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require.NoError(err)
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}
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// Verify other fields
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assert.Equal("web", reply.Service)
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assert.Equal(spiffeId.URI().String(), reply.ServiceURI)
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}
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}
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// Test CA signing
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func TestConnectCASign(t *testing.T) {
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t.Parallel()
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assert := assert.New(t)
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require := require.New(t)
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testrpc.WaitForLeader(t, s1.RPC, "dc1")
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// Generate a CSR and request signing
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spiffeId := connect.TestSpiffeIDService(t, "web")
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csr, _ := connect.TestCSR(t, spiffeId)
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args := &structs.CASignRequest{
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Datacenter: "dc1",
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CSR: csr,
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}
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var reply structs.IssuedCert
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require.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.Sign", args, &reply))
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// Generate a second CSR and request signing
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spiffeId2 := connect.TestSpiffeIDService(t, "web2")
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csr, _ = connect.TestCSR(t, spiffeId2)
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args = &structs.CASignRequest{
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Datacenter: "dc1",
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CSR: csr,
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}
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var reply2 structs.IssuedCert
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require.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.Sign", args, &reply2))
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require.True(reply2.ModifyIndex > reply.ModifyIndex)
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// Get the current CA
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state := s1.fsm.State()
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_, ca, err := state.CARootActive(nil)
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require.NoError(err)
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// Verify that the cert is signed by the CA
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roots := x509.NewCertPool()
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assert.True(roots.AppendCertsFromPEM([]byte(ca.RootCert)))
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leaf, err := connect.ParseCert(reply.CertPEM)
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require.NoError(err)
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_, err = leaf.Verify(x509.VerifyOptions{
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Roots: roots,
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})
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require.NoError(err)
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// Verify other fields
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assert.Equal("web", reply.Service)
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assert.Equal(spiffeId.URI().String(), reply.ServiceURI)
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}
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// Bench how long Signing RPC takes. This was used to ballpark reasonable
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// default rate limit to protect servers from thundering herds of signing
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// requests on root rotation.
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func BenchmarkConnectCASign(b *testing.B) {
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t := &testing.T{}
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require := require.New(b)
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dir1, s1 := testServer(t)
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testrpc.WaitForLeader(t, s1.RPC, "dc1")
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// Generate a CSR and request signing
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spiffeID := connect.TestSpiffeIDService(b, "web")
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csr, _ := connect.TestCSR(b, spiffeID)
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args := &structs.CASignRequest{
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Datacenter: "dc1",
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CSR: csr,
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}
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var reply structs.IssuedCert
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b.ResetTimer()
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for n := 0; n < b.N; n++ {
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require.NoError(msgpackrpc.CallWithCodec(codec, "ConnectCA.Sign", args, &reply))
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}
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}
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func TestConnectCASign_rateLimit(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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dir1, s1 := testServerWithConfig(t, func(c *Config) {
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c.Datacenter = "dc1"
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c.Bootstrap = true
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c.CAConfig.Config = map[string]interface{}{
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// It actually doesn't work as expected with some higher values because
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// the token bucket is initialized with max(10%, 1) burst which for small
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// values is 1 and then the test completes so fast it doesn't actually
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// replenish any tokens so you only get the burst allowed through. This is
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// OK, running the test slower is likely to be more brittle anyway since
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// it will become more timing dependent whether the actual rate the
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// requests are made matches the expectation from the sleeps etc.
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"CSRMaxPerSecond": 1,
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}
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})
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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codec := rpcClient(t, s1)
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defer codec.Close()
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testrpc.WaitForLeader(t, s1.RPC, "dc1")
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// Generate a CSR and request signing a few times in a loop.
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spiffeID := connect.TestSpiffeIDService(t, "web")
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csr, _ := connect.TestCSR(t, spiffeID)
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args := &structs.CASignRequest{
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Datacenter: "dc1",
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CSR: csr,
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}
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var reply structs.IssuedCert
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errs := make([]error, 10)
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for i := 0; i < len(errs); i++ {
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errs[i] = msgpackrpc.CallWithCodec(codec, "ConnectCA.Sign", args, &reply)
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}
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limitedCount := 0
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successCount := 0
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for _, err := range errs {
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if err == nil {
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successCount++
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} else if err.Error() == ErrRateLimited.Error() {
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limitedCount++
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} else {
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require.NoError(err)
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}
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}
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// I've only ever seen this as 1/9 however if the test runs slowly on an
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// over-subscribed CPU (e.g. in CI) it's possible that later requests could
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// have had their token replenished and succeed so we allow a little slack -
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// the test here isn't really the exact token bucket response more a sanity
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// check that some limiting is being applied. Note that we can't just measure
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// the time it took to send them all and infer how many should have succeeded
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// without some complex modelling of the token bucket algorithm.
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require.Truef(successCount >= 1, "at least 1 CSRs should have succeeded, got %d", successCount)
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require.Truef(limitedCount >= 7, "at least 7 CSRs should have been rate limited, got %d", limitedCount)
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}
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func TestConnectCASign_concurrencyLimit(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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dir1, s1 := testServerWithConfig(t, func(c *Config) {
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c.Datacenter = "dc1"
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c.Bootstrap = true
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c.CAConfig.Config = map[string]interface{}{
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// Must disable the rate limit since it takes precedence
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"CSRMaxPerSecond": 0,
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"CSRMaxConcurrent": 1,
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}
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})
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defer os.RemoveAll(dir1)
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defer s1.Shutdown()
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testrpc.WaitForLeader(t, s1.RPC, "dc1")
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// Generate a CSR and request signing a few times in a loop.
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spiffeID := connect.TestSpiffeIDService(t, "web")
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csr, _ := connect.TestCSR(t, spiffeID)
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args := &structs.CASignRequest{
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Datacenter: "dc1",
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CSR: csr,
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}
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var wg sync.WaitGroup
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errs := make(chan error, 10)
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times := make(chan time.Duration, cap(errs))
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start := time.Now()
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for i := 0; i < cap(errs); i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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codec := rpcClient(t, s1)
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defer codec.Close()
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var reply structs.IssuedCert
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errs <- msgpackrpc.CallWithCodec(codec, "ConnectCA.Sign", args, &reply)
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times <- time.Since(start)
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}()
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}
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wg.Wait()
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close(errs)
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limitedCount := 0
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successCount := 0
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var minTime, maxTime time.Duration
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for err := range errs {
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elapsed := <-times
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if elapsed < minTime || minTime == 0 {
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minTime = elapsed
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}
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if elapsed > maxTime {
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maxTime = elapsed
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}
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if err == nil {
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successCount++
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} else if err.Error() == ErrRateLimited.Error() {
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limitedCount++
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} else {
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require.NoError(err)
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}
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}
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// These are very hand wavy - on my mac times look like this:
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// 2.776009ms
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// 3.705813ms
|
|
// 4.527212ms
|
|
// 5.267755ms
|
|
// 6.119809ms
|
|
// 6.958083ms
|
|
// 7.869179ms
|
|
// 8.675058ms
|
|
// 9.512281ms
|
|
// 10.238183ms
|
|
//
|
|
// But it's indistinguishable from noise - even if you disable the concurrency
|
|
// limiter you get pretty much the same pattern/spread.
|
|
//
|
|
// On the other hand it's only timing that stops us from not hitting the 500ms
|
|
// timeout. On highly CPU constrained CI box this could be brittle if we
|
|
// assert that we never get rate limited.
|
|
//
|
|
// So this test is not super strong - but it's a sanity check at least that
|
|
// things don't break when configured this way, and through manual
|
|
// inspection/debug logging etc. we can verify it's actually doing the
|
|
// concurrency limit thing. If you add a 100ms sleep into the sign endpoint
|
|
// after the rate limit code for example it makes it much more obvious:
|
|
//
|
|
// With 100ms sleep an no concurrency limit:
|
|
// min=109ms, max=118ms
|
|
// With concurrency limit of 1:
|
|
// min=106ms, max=538ms (with ~half hitting the 500ms timeout)
|
|
//
|
|
// Without instrumenting the endpoint to make the RPC take an artificially
|
|
// long time it's hard to know what else we can do to actively detect that the
|
|
// requests were serialized.
|
|
t.Logf("min=%s, max=%s", minTime, maxTime)
|
|
//t.Fail() // Uncomment to see the time spread logged
|
|
require.Truef(successCount >= 1, "at least 1 CSRs should have succeeded, got %d", successCount)
|
|
}
|
|
|
|
func TestConnectCASignValidation(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
dir1, s1 := testServerWithConfig(t, func(c *Config) {
|
|
c.ACLDatacenter = "dc1"
|
|
c.ACLsEnabled = true
|
|
c.ACLMasterToken = "root"
|
|
c.ACLDefaultPolicy = "deny"
|
|
})
|
|
defer os.RemoveAll(dir1)
|
|
defer s1.Shutdown()
|
|
codec := rpcClient(t, s1)
|
|
defer codec.Close()
|
|
|
|
testrpc.WaitForLeader(t, s1.RPC, "dc1")
|
|
|
|
// Create an ACL token with service:write for web*
|
|
var webToken string
|
|
{
|
|
arg := structs.ACLRequest{
|
|
Datacenter: "dc1",
|
|
Op: structs.ACLSet,
|
|
ACL: structs.ACL{
|
|
Name: "User token",
|
|
Type: structs.ACLTokenTypeClient,
|
|
Rules: `
|
|
service "web" {
|
|
policy = "write"
|
|
}`,
|
|
},
|
|
WriteRequest: structs.WriteRequest{Token: "root"},
|
|
}
|
|
require.NoError(t, msgpackrpc.CallWithCodec(codec, "ACL.Apply", &arg, &webToken))
|
|
}
|
|
|
|
testWebID := connect.TestSpiffeIDService(t, "web")
|
|
|
|
tests := []struct {
|
|
name string
|
|
id connect.CertURI
|
|
wantErr string
|
|
}{
|
|
{
|
|
name: "different cluster",
|
|
id: &connect.SpiffeIDService{
|
|
Host: "55555555-4444-3333-2222-111111111111.consul",
|
|
Namespace: testWebID.Namespace,
|
|
Datacenter: testWebID.Datacenter,
|
|
Service: testWebID.Service,
|
|
},
|
|
wantErr: "different trust domain",
|
|
},
|
|
{
|
|
name: "same cluster should validate",
|
|
id: testWebID,
|
|
wantErr: "",
|
|
},
|
|
{
|
|
name: "same cluster, CSR for a different DC should NOT validate",
|
|
id: &connect.SpiffeIDService{
|
|
Host: testWebID.Host,
|
|
Namespace: testWebID.Namespace,
|
|
Datacenter: "dc2",
|
|
Service: testWebID.Service,
|
|
},
|
|
wantErr: "different datacenter",
|
|
},
|
|
{
|
|
name: "same cluster and DC, different service should not have perms",
|
|
id: &connect.SpiffeIDService{
|
|
Host: testWebID.Host,
|
|
Namespace: testWebID.Namespace,
|
|
Datacenter: testWebID.Datacenter,
|
|
Service: "db",
|
|
},
|
|
wantErr: "Permission denied",
|
|
},
|
|
}
|
|
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
csr, _ := connect.TestCSR(t, tt.id)
|
|
args := &structs.CASignRequest{
|
|
Datacenter: "dc1",
|
|
CSR: csr,
|
|
WriteRequest: structs.WriteRequest{Token: webToken},
|
|
}
|
|
var reply structs.IssuedCert
|
|
err := msgpackrpc.CallWithCodec(codec, "ConnectCA.Sign", args, &reply)
|
|
if tt.wantErr == "" {
|
|
require.NoError(t, err)
|
|
// No other validation that is handled in different tests
|
|
} else {
|
|
require.Error(t, err)
|
|
require.Contains(t, err.Error(), tt.wantErr)
|
|
}
|
|
})
|
|
}
|
|
}
|