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httpcaddyfile: Add client_auth options to tls directive (#3335)

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* reading client certificate config from Caddyfile

Signed-off-by: NWHirschfeld <Niclas@NWHirschfeld.de>

* Update caddyconfig/httpcaddyfile/builtins.go

Co-authored-by: Francis Lavoie <lavofr@gmail.com>

* added adapt test for parsing client certificate configuration from Caddyfile

Signed-off-by: NWHirschfeld <Niclas@NWHirschfeld.de>

* read client ca and leaf certificates from file https://github.com/caddyserver/caddy/pull/3335#discussion_r421633844

Signed-off-by: NWHirschfeld <Niclas@NWHirschfeld.de>

* Update modules/caddytls/connpolicy.go

* Make review adjustments

Co-authored-by: Francis Lavoie <lavofr@gmail.com>
Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
This commit is contained in:
NWHirschfeld 2020-06-05 20:19:36 +02:00 committed by GitHub
parent 11a132d48b
commit 1dfb11486e
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 215 additions and 8 deletions
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63
caddyconfig/httpcaddyfile/builtins.go
View file

@ -15,8 +15,11 @@
package httpcaddyfile
import (
"encoding/base64"
"encoding/pem"
"fmt"
"html"
"io/ioutil"
"net/http"
"reflect"
"strings"
@ -59,6 +62,13 @@ func parseBind(h Helper) ([]ConfigValue, error) {
// protocols <min> [<max>]
// ciphers <cipher_suites...>
// curves <curves...>
// client_auth {
// mode [request|require|verify_if_given|require_and_verify]
// trusted_ca_cert <base64_der>
// trusted_ca_cert_file <filename>
// trusted_leaf_cert <base64_der>
// trusted_leaf_cert_file <filename>
// }
// alpn <values...>
// load <paths...>
// ca <acme_ca_endpoint>
@ -143,7 +153,7 @@ func parseTLS(h Helper) ([]ConfigValue, error) {
}
var hasBlock bool
for h.NextBlock(0) {
for nesting := h.Nesting(); h.NextBlock(nesting); {
hasBlock = true
switch h.Val() {
@ -181,6 +191,57 @@ func parseTLS(h Helper) ([]ConfigValue, error) {
cp.Curves = append(cp.Curves, h.Val())
}
case "client_auth":
cp.ClientAuthentication = &caddytls.ClientAuthentication{}
for nesting := h.Nesting(); h.NextBlock(nesting); {
subdir := h.Val()
switch subdir {
case "mode":
if !h.Args(&cp.ClientAuthentication.Mode) {
return nil, h.ArgErr()
}
if h.NextArg() {
return nil, h.ArgErr()
}
case "trusted_ca_cert",
"trusted_leaf_cert":
if !h.NextArg() {
return nil, h.ArgErr()
}
if subdir == "trusted_ca_cert" {
cp.ClientAuthentication.TrustedCACerts = append(cp.ClientAuthentication.TrustedCACerts, h.Val())
} else {
cp.ClientAuthentication.TrustedLeafCerts = append(cp.ClientAuthentication.TrustedLeafCerts, h.Val())
}
case "trusted_ca_cert_file",
"trusted_leaf_cert_file":
if !h.NextArg() {
return nil, h.ArgErr()
}
filename := h.Val()
certDataPEM, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
block, _ := pem.Decode(certDataPEM)
if block == nil || block.Type != "CERTIFICATE" {
return nil, h.Errf("no CERTIFICATE pem block found in %s", h.Val())
}
if subdir == "trusted_ca_cert_file" {
cp.ClientAuthentication.TrustedCACerts = append(cp.ClientAuthentication.TrustedCACerts,
base64.StdEncoding.EncodeToString(block.Bytes))
} else {
cp.ClientAuthentication.TrustedLeafCerts = append(cp.ClientAuthentication.TrustedLeafCerts,
base64.StdEncoding.EncodeToString(block.Bytes))
}
default:
return nil, h.Errf("unknown subdirective for client_auth: %s", subdir)
}
}
case "alpn":
args := h.RemainingArgs()
if len(args) == 0 {

20
caddytest/caddy.ca.cer Normal file
View file

@ -0,0 +1,20 @@
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

66
caddytest/integration/caddyfile_adapt/tls_client_auth_cert_file.txt Normal file
View file

@ -0,0 +1,66 @@
localhost
respond "hello from localhost"
tls {
client_auth {
mode request
trusted_ca_cert_file ../caddy.ca.cer
}
}
----------
{
"apps": {
"http": {
"servers": {
"srv0": {
"listen": [
":443"
],
"routes": [
{
"match": [
{
"host": [
"localhost"
]
}
],
"handle": [
{
"handler": "subroute",
"routes": [
{
"handle": [
{
"body": "hello from localhost",
"handler": "static_response"
}
]
}
]
}
],
"terminal": true
}
],
"tls_connection_policies": [
{
"match": {
"sni": [
"localhost"
]
},
"client_authentication": {
"trusted_ca_certs": [
"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"
],
"mode": "request"
}
},
{}
]
}
}
}
}
}

66
caddytest/integration/caddyfile_adapt/tls_client_auth_inline_cert.txt Normal file
View file

@ -0,0 +1,66 @@
localhost
respond "hello from localhost"
tls {
client_auth {
mode request
trusted_ca_cert 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
}
}
----------
{
"apps": {
"http": {
"servers": {
"srv0": {
"listen": [
":443"
],
"routes": [
{
"match": [
{
"host": [
"localhost"
]
}
],
"handle": [
{
"handler": "subroute",
"routes": [
{
"handle": [
{
"body": "hello from localhost",
"handler": "static_response"
}
]
}
]
}
],
"terminal": true
}
],
"tls_connection_policies": [
{
"match": {
"sni": [
"localhost"
]
},
"client_authentication": {
"trusted_ca_certs": [
"MIIDSzCCAjOgAwIBAgIUfIRObjWNUA4jxQ/0x8BOCvE2Vw4wDQYJKoZIhvcNAQELBQAwFjEUMBIGA1UEAwwLRWFzeS1SU0EgQ0EwHhcNMTkwODI4MTYyNTU5WhcNMjkwODI1MTYyNTU5WjAWMRQwEgYDVQQDDAtFYXN5LVJTQSBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAK5m5elxhQfMp/3aVJ4JnpN9PUSz6LlP6LePAPFU7gqohVVFVtDkChJAG3FNkNQNlieVTja/bgH9IcC6oKbROwdY1h0MvNV8AHHigvl03WuJD8g2ReVFXXwsnrPmKXCFzQyMI6TYk3m2gYrXsZOU1GLnfMRC3KAMRgE2F45twOs9hqG169YJ6mM2eQjzjCHWI6S2/iUYvYxRkCOlYUbLsMD/AhgAf1plzg6LPqNxtdlwxZnA0ytgkmhK67HtzJu0+ovUCsMv0RwcMhsEo9T8nyFAGt9XLZ63X5WpBCTUApaAUhnG0XnerjmUWb6eUWw4zev54sEfY5F3x002iQaW6cECAwEAAaOBkDCBjTAdBgNVHQ4EFgQU4CBUbZsS2GaNIkGRz/cBsD5ivjswUQYDVR0jBEowSIAU4CBUbZsS2GaNIkGRz/cBsD5ivjuhGqQYMBYxFDASBgNVBAMMC0Vhc3ktUlNBIENBghR8hE5uNY1QDiPFD/THwE4K8TZXDjAMBgNVHRMEBTADAQH/MAsGA1UdDwQEAwIBBjANBgkqhkiG9w0BAQsFAAOCAQEAKB3V4HIzoiO/Ch6WMj9bLJ2FGbpkMrcb/Eq01hT5zcfKD66lVS1MlK+cRL446Z2b2KDP1oFyVs+qmrmtdwrWgD+nfe2sBmmIHo9m9KygMkEOfG3MghGTEcS+0cTKEcoHYWYyOqQh6jnedXY8Cdm4GM1hAc9MiL3/sqV8YCVSLNnkoNysmr06/rZ0MCUZPGUtRmfd0heWhrfzAKw2HLgX+RAmpOE2MZqWcjvqKGyaRiaZks4nJkP6521aC2Lgp0HhCz1j8/uQ5ldoDszCnu/iro0NAsNtudTMD+YoLQxLqdleIh6CW+illc2VdXwj7mn6J04yns9jfE2jRjW/yTLFuQ=="
],
"mode": "request"
}
},
{}
]
}
}
}
}
}

8
modules/caddytls/connpolicy.go
View file

@ -334,7 +334,7 @@ func (clientauth *ClientAuthentication) ConfigureTLSConfig(cfg *tls.Config) erro
case "require_and_verify":
cfg.ClientAuth = tls.RequireAndVerifyClientCert
default:
return fmt.Errorf("client auth mode %s not allowed", clientauth.Mode)
return fmt.Errorf("client auth mode not recognized: %s", clientauth.Mode)
}
} else {
// otherwise, set a safe default mode
@ -361,7 +361,6 @@ func (clientauth *ClientAuthentication) ConfigureTLSConfig(cfg *tls.Config) erro
// enforce leaf verification by writing our own verify function
if len(clientauth.TrustedLeafCerts) > 0 {
clientauth.trustedLeafCerts = []*x509.Certificate{}
for _, clientCertString := range clientauth.TrustedLeafCerts {
clientCert, err := decodeBase64DERCert(clientCertString)
if err != nil {
@ -369,10 +368,8 @@ func (clientauth *ClientAuthentication) ConfigureTLSConfig(cfg *tls.Config) erro
}
clientauth.trustedLeafCerts = append(clientauth.trustedLeafCerts, clientCert)
}
// if a custom verification function already exists, wrap it
clientauth.existingVerifyPeerCert = cfg.VerifyPeerCertificate
cfg.VerifyPeerCertificate = clientauth.verifyPeerCertificate
}
@ -411,13 +408,10 @@ func (clientauth ClientAuthentication) verifyPeerCertificate(rawCerts [][]byte,
// decodeBase64DERCert base64-decodes, then DER-decodes, certStr.
func decodeBase64DERCert(certStr string) (*x509.Certificate, error) {
// decode base64
derBytes, err := base64.StdEncoding.DecodeString(certStr)
if err != nil {
return nil, err
}
// parse the DER-encoded certificate
return x509.ParseCertificate(derBytes)
}