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Merge pull request #107 from slackhq/ca-ip 

Support extra root assertions in `cert.Verify`
This commit is contained in:
Nathan Brown 2019-12-17 19:09:52 -08:00 committed by GitHub
parent 8b2ee5cf34 328db6bb82
commit 8e6b72516b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 377 additions and 31 deletions
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90
cert/cert.go
View File

@ -267,16 +267,53 @@ func (nc *NebulaCertificate) Verify(t time.Time, ncp *NebulaCAPool) (bool, error
return false, fmt.Errorf("certificate signature did not match")
}
if err := nc.CheckRootConstrains(signer); err != nil {
return false, err
}
return true, nil
}
// CheckRootConstrains returns an error if the certificate violates constraints set on the root (groups, ips, subnets)
func (nc *NebulaCertificate) CheckRootConstrains(signer *NebulaCertificate) error {
// Make sure this cert wasn't valid before the root
if signer.Details.NotAfter.Before(nc.Details.NotAfter) {
return fmt.Errorf("certificate expires after signing certificate")
}
// Make sure this cert isn't valid after the root
if signer.Details.NotBefore.After(nc.Details.NotBefore) {
return fmt.Errorf("certificate is valid before the signing certificate")
}
// If the signer has a limited set of groups make sure the cert only contains a subset
if len(signer.Details.InvertedGroups) > 0 {
for _, g := range nc.Details.Groups {
if _, ok := signer.Details.InvertedGroups[g]; !ok {
return false, fmt.Errorf("certificate contained a group not present on the signing ca; %s", g)
return fmt.Errorf("certificate contained a group not present on the signing ca: %s", g)
}
}
}
return true, nil
// If the signer has a limited set of ip ranges to issue from make sure the cert only contains a subset
if len(signer.Details.Ips) > 0 {
for _, ip := range nc.Details.Ips {
if !netMatch(ip, signer.Details.Ips) {
return fmt.Errorf("certificate contained an ip assignment outside the limitations of the signing ca: %s", ip.String())
}
}
}
// If the signer has a limited set of subnet ranges to issue from make sure the cert only contains a subset
if len(signer.Details.Subnets) > 0 {
for _, subnet := range nc.Details.Subnets {
if !netMatch(subnet, signer.Details.Subnets) {
return fmt.Errorf("certificate contained a subnet assignment outside the limitations of the signing ca: %s", subnet)
}
}
}
return nil
}
// VerifyPrivateKey checks that the public key in the Nebula certificate and a supplied private key match
@ -431,6 +468,55 @@ func (nc *NebulaCertificate) MarshalJSON() ([]byte, error) {
return json.Marshal(jc)
}
func netMatch(certIp *net.IPNet, rootIps []*net.IPNet) bool {
for _, net := range rootIps {
if net.Contains(certIp.IP) && maskContains(net.Mask, certIp.Mask) {
return true
}
}
return false
}
func maskContains(caMask, certMask net.IPMask) bool {
caM := maskTo4(caMask)
cM := maskTo4(certMask)
// Make sure forcing to ipv4 didn't nuke us
if caM == nil || cM == nil {
return false
}
// Make sure the cert mask is not greater than the ca mask
for i := 0; i < len(caMask); i++ {
if caM[i] > cM[i] {
return false
}
}
return true
}
func maskTo4(ip net.IPMask) net.IPMask {
if len(ip) == net.IPv4len {
return ip
}
if len(ip) == net.IPv6len && isZeros(ip[0:10]) && ip[10] == 0xff && ip[11] == 0xff {
return ip[12:16]
}
return nil
}
func isZeros(b []byte) bool {
for i := 0; i < len(b); i++ {
if b[i] != 0 {
return false
}
}
return true
}
func ip2int(ip []byte) uint32 {
if len(ip) == 16 {
return binary.BigEndian.Uint32(ip[12:16])

263
cert/cert_test.go
View File

@ -158,10 +158,10 @@ func TestNebulaCertificate_MarshalJSON(t *testing.T) {
}
func TestNebulaCertificate_Verify(t *testing.T) {
ca, _, caKey, err := newTestCaCert()
ca, _, caKey, err := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
assert.Nil(t, err)
c, _, _, err := newTestCert(ca, caKey)
c, _, _, err := newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
assert.Nil(t, err)
h, err := ca.Sha256Sum()
@ -186,13 +186,199 @@ func TestNebulaCertificate_Verify(t *testing.T) {
v, err = c.Verify(time.Now().Add(time.Hour*1000), caPool)
assert.False(t, v)
assert.EqualError(t, err, "root certificate is expired")
c, _, _, err = newTestCert(ca, caKey, time.Time{}, time.Time{}, []*net.IPNet{}, []*net.IPNet{}, []string{})
assert.Nil(t, err)
v, err = c.Verify(time.Now().Add(time.Minute*6), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate is expired")
// Test group assertion
ca, _, caKey, err = newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{"test1", "test2"})
assert.Nil(t, err)
caPem, err := ca.MarshalToPEM()
assert.Nil(t, err)
caPool = NewCAPool()
caPool.AddCACertificate(caPem)
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{"test1", "bad"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained a group not present on the signing ca: bad")
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{"test1"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
}
func TestNebulaCertificate_Verify_IPs(t *testing.T) {
_, caIp1, _ := net.ParseCIDR("10.0.0.0/16")
_, caIp2, _ := net.ParseCIDR("192.168.0.0/24")
ca, _, caKey, err := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{caIp1, caIp2}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
caPem, err := ca.MarshalToPEM()
assert.Nil(t, err)
caPool := NewCAPool()
caPool.AddCACertificate(caPem)
// ip is outside the network
cIp1 := &net.IPNet{IP: net.ParseIP("10.1.0.0"), Mask: []byte{255, 255, 255, 0}}
cIp2 := &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 0, 0}}
c, _, _, err := newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{cIp1, cIp2}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err := c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained an ip assignment outside the limitations of the signing ca: 10.1.0.0/24")
// ip is outside the network reversed order of above
cIp1 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("10.1.0.0"), Mask: []byte{255, 255, 255, 0}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{cIp1, cIp2}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained an ip assignment outside the limitations of the signing ca: 10.1.0.0/24")
// ip is within the network but mask is outside
cIp1 = &net.IPNet{IP: net.ParseIP("10.0.1.0"), Mask: []byte{255, 254, 0, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 0}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{cIp1, cIp2}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained an ip assignment outside the limitations of the signing ca: 10.0.1.0/15")
// ip is within the network but mask is outside reversed order of above
cIp1 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("10.0.1.0"), Mask: []byte{255, 254, 0, 0}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{cIp1, cIp2}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained an ip assignment outside the limitations of the signing ca: 10.0.1.0/15")
// ip and mask are within the network
cIp1 = &net.IPNet{IP: net.ParseIP("10.0.1.0"), Mask: []byte{255, 255, 0, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 128}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{cIp1, cIp2}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
// Exact matches
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{caIp1, caIp2}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
// Exact matches reversed
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{caIp2, caIp1}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
// Exact matches reversed with just 1
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{caIp1}, []*net.IPNet{}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
}
func TestNebulaCertificate_Verify_Subnets(t *testing.T) {
_, caIp1, _ := net.ParseCIDR("10.0.0.0/16")
_, caIp2, _ := net.ParseCIDR("192.168.0.0/24")
ca, _, caKey, err := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{caIp1, caIp2}, []string{"test"})
assert.Nil(t, err)
caPem, err := ca.MarshalToPEM()
assert.Nil(t, err)
caPool := NewCAPool()
caPool.AddCACertificate(caPem)
// ip is outside the network
cIp1 := &net.IPNet{IP: net.ParseIP("10.1.0.0"), Mask: []byte{255, 255, 255, 0}}
cIp2 := &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 0, 0}}
c, _, _, err := newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{cIp1, cIp2}, []string{"test"})
assert.Nil(t, err)
v, err := c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained a subnet assignment outside the limitations of the signing ca: 10.1.0.0/24")
// ip is outside the network reversed order of above
cIp1 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("10.1.0.0"), Mask: []byte{255, 255, 255, 0}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{cIp1, cIp2}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained a subnet assignment outside the limitations of the signing ca: 10.1.0.0/24")
// ip is within the network but mask is outside
cIp1 = &net.IPNet{IP: net.ParseIP("10.0.1.0"), Mask: []byte{255, 254, 0, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 0}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{cIp1, cIp2}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained a subnet assignment outside the limitations of the signing ca: 10.0.1.0/15")
// ip is within the network but mask is outside reversed order of above
cIp1 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("10.0.1.0"), Mask: []byte{255, 254, 0, 0}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{cIp1, cIp2}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.False(t, v)
assert.EqualError(t, err, "certificate contained a subnet assignment outside the limitations of the signing ca: 10.0.1.0/15")
// ip and mask are within the network
cIp1 = &net.IPNet{IP: net.ParseIP("10.0.1.0"), Mask: []byte{255, 255, 0, 0}}
cIp2 = &net.IPNet{IP: net.ParseIP("192.168.0.1"), Mask: []byte{255, 255, 255, 128}}
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{cIp1, cIp2}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
// Exact matches
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{caIp1, caIp2}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
// Exact matches reversed
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{caIp2, caIp1}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
// Exact matches reversed with just 1
c, _, _, err = newTestCert(ca, caKey, time.Now(), time.Now().Add(5*time.Minute), []*net.IPNet{}, []*net.IPNet{caIp1}, []string{"test"})
assert.Nil(t, err)
v, err = c.Verify(time.Now(), caPool)
assert.True(t, v)
assert.Nil(t, err)
}
func TestNebulaVerifyPrivateKey(t *testing.T) {
ca, _, caKey, err := newTestCaCert()
ca, _, caKey, err := newTestCaCert(time.Time{}, time.Time{}, []*net.IPNet{}, []*net.IPNet{}, []string{})
assert.Nil(t, err)
c, _, priv, err := newTestCert(ca, caKey)
c, _, priv, err := newTestCert(ca, caKey, time.Time{}, time.Time{}, []*net.IPNet{}, []*net.IPNet{}, []string{})
err = c.VerifyPrivateKey(priv)
assert.Nil(t, err)
@ -301,10 +487,14 @@ func TestMarshalingNebulaCertificateConsistency(t *testing.T) {
assert.Equal(t, "0a0774657374696e67121b8182845080feffff0f828284508080fcff0f8382845080fe83f80f1a1b8182844880fe83f80f8282844880feffff0f838284488080fcff0f220b746573742d67726f757031220b746573742d67726f757032220b746573742d67726f75703328f0e0e7d70430a08681c4053a20313233343536373839306162636564666768696a3132333435363738393061624a081234567890abcedf", fmt.Sprintf("%x", b))
}
func newTestCaCert() (*NebulaCertificate, []byte, []byte, error) {
func newTestCaCert(before, after time.Time, ips, subnets []*net.IPNet, groups []string) (*NebulaCertificate, []byte, []byte, error) {
pub, priv, err := ed25519.GenerateKey(rand.Reader)
before := time.Now().Add(time.Second * -60).Round(time.Second)
after := time.Now().Add(time.Second * 60).Round(time.Second)
if before.IsZero() {
before = time.Now().Add(time.Second * -60).Round(time.Second)
}
if after.IsZero() {
after = time.Now().Add(time.Second * 60).Round(time.Second)
}
nc := &NebulaCertificate{
Details: NebulaCertificateDetails{
@ -316,6 +506,18 @@ func newTestCaCert() (*NebulaCertificate, []byte, []byte, error) {
},
}
if len(ips) > 0 {
nc.Details.Ips = ips
}
if len(subnets) > 0 {
nc.Details.Subnets = subnets
}
if len(groups) > 0 {
nc.Details.Groups = groups
}
err = nc.Sign(priv)
if err != nil {
return nil, nil, nil, err
@ -323,30 +525,47 @@ func newTestCaCert() (*NebulaCertificate, []byte, []byte, error) {
return nc, pub, priv, nil
}
func newTestCert(ca *NebulaCertificate, key []byte) (*NebulaCertificate, []byte, []byte, error) {
func newTestCert(ca *NebulaCertificate, key []byte, before, after time.Time, ips, subnets []*net.IPNet, groups []string) (*NebulaCertificate, []byte, []byte, error) {
issuer, err := ca.Sha256Sum()
if err != nil {
return nil, nil, nil, err
}
before := time.Now().Add(time.Second * -60).Round(time.Second)
after := time.Now().Add(time.Second * 60).Round(time.Second)
if before.IsZero() {
before = time.Now().Add(time.Second * -60).Round(time.Second)
}
if after.IsZero() {
after = time.Now().Add(time.Second * 60).Round(time.Second)
}
if len(groups) == 0 {
groups = []string{"test-group1", "test-group2", "test-group3"}
}
if len(ips) == 0 {
ips = []*net.IPNet{
{IP: net.ParseIP("10.1.1.1"), Mask: net.IPMask(net.ParseIP("255.255.255.0"))},
{IP: net.ParseIP("10.1.1.2"), Mask: net.IPMask(net.ParseIP("255.255.0.0"))},
{IP: net.ParseIP("10.1.1.3"), Mask: net.IPMask(net.ParseIP("255.0.255.0"))},
}
}
if len(subnets) == 0 {
subnets = []*net.IPNet{
{IP: net.ParseIP("9.1.1.1"), Mask: net.IPMask(net.ParseIP("255.0.255.0"))},
{IP: net.ParseIP("9.1.1.2"), Mask: net.IPMask(net.ParseIP("255.255.255.0"))},
{IP: net.ParseIP("9.1.1.3"), Mask: net.IPMask(net.ParseIP("255.255.0.0"))},
}
}
pub, rawPriv := x25519Keypair()
nc := &NebulaCertificate{
Details: NebulaCertificateDetails{
Name: "testing",
Ips: []*net.IPNet{
{IP: net.ParseIP("10.1.1.1"), Mask: net.IPMask(net.ParseIP("255.255.255.0"))},
{IP: net.ParseIP("10.1.1.2"), Mask: net.IPMask(net.ParseIP("255.255.0.0"))},
{IP: net.ParseIP("10.1.1.3"), Mask: net.IPMask(net.ParseIP("255.0.255.0"))},
},
Subnets: []*net.IPNet{
{IP: net.ParseIP("9.1.1.1"), Mask: net.IPMask(net.ParseIP("255.0.255.0"))},
{IP: net.ParseIP("9.1.1.2"), Mask: net.IPMask(net.ParseIP("255.255.255.0"))},
{IP: net.ParseIP("9.1.1.3"), Mask: net.IPMask(net.ParseIP("255.255.0.0"))},
},
Groups: []string{"test-group1", "test-group2", "test-group3"},
Name: "testing",
Ips: ips,
Subnets: subnets,
Groups: groups,
NotBefore: before,
NotAfter: after,
PublicKey: pub,

39
cmd/nebula-cert/ca.go
View File

@ -6,6 +6,7 @@ import (
"fmt"
"io"
"io/ioutil"
"net"
"os"
"strings"
"time"
@ -21,6 +22,8 @@ type caFlags struct {
outKeyPath *string
outCertPath *string
groups *string
ips *string
subnets *string
}
func newCaFlags() *caFlags {
@ -31,6 +34,8 @@ func newCaFlags() *caFlags {
cf.outKeyPath = cf.set.String("out-key", "ca.key", "Optional: path to write the private key to")
cf.outCertPath = cf.set.String("out-crt", "ca.crt", "Optional: path to write the certificate to")
cf.groups = cf.set.String("groups", "", "Optional: comma separated list of groups. This will limit which groups subordinate certs can use")
cf.ips = cf.set.String("ips", "", "Optional: comma separated list of ip and network in CIDR notation. This will limit which ip addresses and networks subordinate certs can use")
cf.subnets = cf.set.String("subnets", "", "Optional: comma separated list of ip and network in CIDR notation. This will limit which subnet addresses and networks subordinate certs can use")
return &cf
}
@ -55,7 +60,7 @@ func ca(args []string, out io.Writer, errOut io.Writer) error {
return &helpError{"-duration must be greater than 0"}
}
groups := []string{}
var groups []string
if *cf.groups != "" {
for _, rg := range strings.Split(*cf.groups, ",") {
g := strings.TrimSpace(rg)
@ -65,6 +70,36 @@ func ca(args []string, out io.Writer, errOut io.Writer) error {
}
}
var ips []*net.IPNet
if *cf.ips != "" {
for _, rs := range strings.Split(*cf.ips, ",") {
rs := strings.Trim(rs, " ")
if rs != "" {
ip, ipNet, err := net.ParseCIDR(rs)
if err != nil {
return newHelpErrorf("invalid ip definition: %s", err)
}
ipNet.IP = ip
ips = append(ips, ipNet)
}
}
}
var subnets []*net.IPNet
if *cf.subnets != "" {
for _, rs := range strings.Split(*cf.subnets, ",") {
rs := strings.Trim(rs, " ")
if rs != "" {
_, s, err := net.ParseCIDR(rs)
if err != nil {
return newHelpErrorf("invalid subnet definition: %s", err)
}
subnets = append(subnets, s)
}
}
}
pub, rawPriv, err := ed25519.GenerateKey(rand.Reader)
if err != nil {
return fmt.Errorf("error while generating ed25519 keys: %s", err)
@ -74,6 +109,8 @@ func ca(args []string, out io.Writer, errOut io.Writer) error {
Details: cert.NebulaCertificateDetails{
Name: *cf.name,
Groups: groups,
Ips: ips,
Subnets: subnets,
NotBefore: time.Now(),
NotAfter: time.Now().Add(*cf.duration),
PublicKey: pub,

6
cmd/nebula-cert/ca_test.go
View File

@ -29,12 +29,16 @@ func Test_caHelp(t *testing.T) {
" \tOptional: amount of time the certificate should be valid for. Valid time units are seconds: \"s\", minutes: \"m\", hours: \"h\" (default 8760h0m0s)\n"+
" -groups string\n"+
" \tOptional: comma separated list of groups. This will limit which groups subordinate certs can use\n"+
" -ips string\n"+
" \tOptional: comma separated list of ip and network in CIDR notation. This will limit which ip addresses and networks subordinate certs can use\n"+
" -name string\n"+
" \tRequired: name of the certificate authority\n"+
" -out-crt string\n"+
" \tOptional: path to write the certificate to (default \"ca.crt\")\n"+
" -out-key string\n"+
" \tOptional: path to write the private key to (default \"ca.key\")\n",
" \tOptional: path to write the private key to (default \"ca.key\")\n"+
" -subnets string\n"+
" \tOptional: comma separated list of ip and network in CIDR notation. This will limit which subnet addresses and networks subordinate certs can use\n",
ob.String(),
)
}

8
cmd/nebula-cert/sign.go
View File

@ -103,10 +103,6 @@ func signCert(args []string, out io.Writer, errOut io.Writer) error {
*sf.duration = time.Until(caCert.Details.NotAfter) - time.Second*1
}
if caCert.Details.NotAfter.Before(time.Now().Add(*sf.duration)) {
return fmt.Errorf("refusing to generate certificate with duration beyond root expiration: %s", caCert.Details.NotAfter)
}
ip, ipNet, err := net.ParseCIDR(*sf.ip)
if err != nil {
return newHelpErrorf("invalid ip definition: %s", err)
@ -165,6 +161,10 @@ func signCert(args []string, out io.Writer, errOut io.Writer) error {
},
}
if err := nc.CheckRootConstrains(caCert); err != nil {
return fmt.Errorf("refusing to sign, root certificate constraints violated: %s", err)
}
if *sf.outKeyPath == "" {
*sf.outKeyPath = *sf.name + ".key"
}

2
cmd/nebula-cert/sign_test.go
View File

@ -253,7 +253,7 @@ func Test_signCert(t *testing.T) {
ob.Reset()
eb.Reset()
args = []string{"-ca-crt", caCrtF.Name(), "-ca-key", caKeyF.Name(), "-name", "test", "-ip", "1.1.1.1/24", "-out-crt", crtF.Name(), "-out-key", keyF.Name(), "-duration", "1000m", "-subnets", "10.1.1.1/32, , 10.2.2.2/32 , , ,, 10.5.5.5/32", "-groups", "1,, 2 , ,,,3,4,5"}
assert.EqualError(t, signCert(args, ob, eb), "refusing to generate certificate with duration beyond root expiration: "+ca.Details.NotAfter.Format("2006-01-02 15:04:05 +0000 UTC"))
assert.EqualError(t, signCert(args, ob, eb), "refusing to sign, root certificate constraints violated: certificate expires after signing certificate")
assert.Empty(t, ob.String())
assert.Empty(t, eb.String())