Add proxy_ssl_* directives
Add support for backends which require client certificate (eg. NiFi) authentication. The `proxy-ssl-secret` k8s annotation references a secret which is used to authenticate to the backend server. All other directives fine tune the backend communication. The following annotations are supported: * proxy-ssl-secret * proxy-ssl-ciphers * proxy-ssl-protocol * proxy-ssl-verify * proxy-ssl-verify-depth
This commit is contained in:
Gabor Lekeny
parent
589c9a20f9
commit
def13fc06c
8 changed files with 476 additions and 0 deletions
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@ -67,6 +67,11 @@ You can add these Kubernetes annotations to specific Ingress objects to customiz
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|[nginx.ingress.kubernetes.io/proxy-redirect-from](#proxy-redirect)|string|
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|[nginx.ingress.kubernetes.io/proxy-redirect-to](#proxy-redirect)|string|
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|[nginx.ingress.kubernetes.io/proxy-http-version](#proxy-http-version)|"1.0" or "1.1"|
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|[nginx.ingress.kubernetes.io/proxy-ssl-secret](#backend-certificate-authentication)|string|
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|[nginx.ingress.kubernetes.io/proxy-ssl-ciphers](#backend-certificate-authentication)|string|
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|[nginx.ingress.kubernetes.io/proxy-ssl-protocols](#backend-certificate-authentication)|string|
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|[nginx.ingress.kubernetes.io/proxy-ssl-verify](#backend-certificate-authentication)|string|
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|[nginx.ingress.kubernetes.io/proxy-ssl-verify-depth](#backend-certificate-authentication)|number|
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|[nginx.ingress.kubernetes.io/enable-rewrite-log](#enable-rewrite-log)|"true" or "false"|
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|[nginx.ingress.kubernetes.io/rewrite-target](#rewrite)|URI|
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|[nginx.ingress.kubernetes.io/satisfy](#satisfy)|string|
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@ -233,6 +238,21 @@ The annotations are:
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Only Authenticated Origin Pulls are allowed and can be configured by following their tutorial: [https://support.cloudflare.com/hc/en-us/articles/204494148-Setting-up-NGINX-to-use-TLS-Authenticated-Origin-Pulls](https://support.cloudflare.com/hc/en-us/articles/204494148-Setting-up-NGINX-to-use-TLS-Authenticated-Origin-Pulls)
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### Backend Certificate Authentication
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It is possible to authenticate to a proxied HTTPS backend with certificate using additional annotations in Ingress Rule.
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* `nginx.ingress.kubernetes.io/proxy-ssl-secret: secretName`:
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Specifies a Secret with the certificate `tls.crt`, key `tls.key` in PEM format used for authentication to a proxied HTTPS server. It should also contain trusted CA certificates `ca.crt` in PEM format used to verify the certificate of the proxied HTTPS server.
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This annotation also accepts the alternative form "namespace/secretName", in which case the Secret lookup is performed in the referenced namespace instead of the Ingress namespace.
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* `nginx.ingress.kubernetes.io/proxy-ssl-verify`:
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Enables or disables verification of the proxied HTTPS server certificate. (default: off)
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* `nginx.ingress.kubernetes.io/proxy-ssl-verify-depth`:
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Sets the verification depth in the proxied HTTPS server certificates chain. (default: 1)
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* `nginx.ingress.kubernetes.io/proxy-ssl-ciphers`:
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Specifies the enabled [ciphers](http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_ssl_ciphers) for requests to a proxied HTTPS server. The ciphers are specified in the format understood by the OpenSSL library.
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* `nginx.ingress.kubernetes.io/proxy-ssl-protocols`:
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Enables the specified [protocols](http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_ssl_protocols) for requests to a proxied HTTPS server.
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### Configuration snippet
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@ -20,6 +20,7 @@ import (
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"github.com/imdario/mergo"
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"k8s.io/ingress-nginx/internal/ingress/annotations/canary"
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"k8s.io/ingress-nginx/internal/ingress/annotations/modsecurity"
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"k8s.io/ingress-nginx/internal/ingress/annotations/proxyssl"
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"k8s.io/ingress-nginx/internal/ingress/annotations/sslcipher"
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"k8s.io/klog"
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@ -87,6 +88,7 @@ type Ingress struct {
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EnableGlobalAuth bool
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HTTP2PushPreload bool
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Proxy proxy.Config
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ProxySSL proxyssl.Config
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RateLimit ratelimit.Config
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Redirect redirect.Config
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Rewrite rewrite.Config
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@ -132,6 +134,7 @@ func NewAnnotationExtractor(cfg resolver.Resolver) Extractor {
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"EnableGlobalAuth": authreqglobal.NewParser(cfg),
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"HTTP2PushPreload": http2pushpreload.NewParser(cfg),
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"Proxy": proxy.NewParser(cfg),
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"ProxySSL": proxyssl.NewParser(cfg),
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"RateLimit": ratelimit.NewParser(cfg),
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"Redirect": redirect.NewParser(cfg),
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"Rewrite": rewrite.NewParser(cfg),
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157
internal/ingress/annotations/proxyssl/main.go
Normal file
157
internal/ingress/annotations/proxyssl/main.go
Normal file
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@ -0,0 +1,157 @@
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package proxyssl
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import (
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"regexp"
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"sort"
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"strings"
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"github.com/pkg/errors"
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networking "k8s.io/api/networking/v1beta1"
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"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
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ing_errors "k8s.io/ingress-nginx/internal/ingress/errors"
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"k8s.io/ingress-nginx/internal/ingress/resolver"
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"k8s.io/ingress-nginx/internal/k8s"
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)
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const (
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defaultProxySSLCiphers = "DEFAULT"
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defaultProxySSLProtocols = "TLSv1 TLSv1.1 TLSv1.2"
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defaultProxySSLVerify = "off"
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defaultProxySSLVerifyDepth = 1
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)
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var (
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proxySSLOnOffRegex = regexp.MustCompile(`^(on|off)$`)
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proxySSLProtocolRegex = regexp.MustCompile(`^(SSLv2|SSLv3|TLSv1|TLSv1\.1|TLSv1\.2|TLSv1\.3)$`)
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)
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// Config contains the AuthSSLCert used for mutual authentication
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// and the configured VerifyDepth
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type Config struct {
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resolver.AuthSSLCert
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Ciphers string `json:"ciphers"`
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Protocols string `json:"protocols"`
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Verify string `json:"verify"`
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VerifyDepth int `json:"verifyDepth"`
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}
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// Equal tests for equality between two Config types
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func (pssl1 *Config) Equal(pssl2 *Config) bool {
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if pssl1 == pssl2 {
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return true
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}
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if pssl1 == nil || pssl2 == nil {
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return false
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}
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if !(&pssl1.AuthSSLCert).Equal(&pssl2.AuthSSLCert) {
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return false
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}
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if pssl1.Ciphers != pssl2.Ciphers {
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return false
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}
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if pssl1.Protocols != pssl2.Protocols {
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return false
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}
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if pssl1.Verify != pssl2.Verify {
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return false
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}
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if pssl1.VerifyDepth != pssl2.VerifyDepth {
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return false
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}
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return true
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}
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// NewParser creates a new TLS authentication annotation parser
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func NewParser(resolver resolver.Resolver) parser.IngressAnnotation {
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return proxySSL{resolver}
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}
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type proxySSL struct {
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r resolver.Resolver
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}
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func sortProtocols(protocols string) string {
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protolist := strings.Split(protocols, " ")
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n := 0
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for _, proto := range protolist {
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proto = strings.TrimSpace(proto)
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if proto == "" || !proxySSLProtocolRegex.MatchString(proto) {
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continue
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}
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protolist[n] = proto
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n++
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}
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if n == 0 {
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return defaultProxySSLProtocols
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}
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protolist = protolist[:n]
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sort.Strings(protolist)
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return strings.Join(protolist, " ")
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}
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// Parse parses the annotations contained in the ingress
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// rule used to use a Certificate as authentication method
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func (p proxySSL) Parse(ing *networking.Ingress) (interface{}, error) {
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var err error
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config := &Config{}
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proxysslsecret, err := parser.GetStringAnnotation("proxy-ssl-secret", ing)
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if err != nil {
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return &Config{}, err
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}
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_, _, err = k8s.ParseNameNS(proxysslsecret)
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if err != nil {
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return &Config{}, ing_errors.NewLocationDenied(err.Error())
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}
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proxyCert, err := p.r.GetAuthCertificate(proxysslsecret)
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if err != nil {
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e := errors.Wrap(err, "error obtaining certificate")
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return &Config{}, ing_errors.LocationDenied{Reason: e}
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}
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config.AuthSSLCert = *proxyCert
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config.Ciphers, err = parser.GetStringAnnotation("proxy-ssl-ciphers", ing)
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if err != nil {
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config.Ciphers = defaultProxySSLCiphers
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}
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config.Protocols, err = parser.GetStringAnnotation("proxy-ssl-protocols", ing)
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if err != nil {
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config.Protocols = defaultProxySSLProtocols
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} else {
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config.Protocols = sortProtocols(config.Protocols)
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}
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config.Verify, err = parser.GetStringAnnotation("proxy-ssl-verify", ing)
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if err != nil || !proxySSLOnOffRegex.MatchString(config.Verify) {
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config.Verify = defaultProxySSLVerify
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}
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config.VerifyDepth, err = parser.GetIntAnnotation("proxy-ssl-verify-depth", ing)
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if err != nil || config.VerifyDepth == 0 {
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config.VerifyDepth = defaultProxySSLVerifyDepth
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}
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return config, nil
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}
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265
internal/ingress/annotations/proxyssl/main_test.go
Normal file
265
internal/ingress/annotations/proxyssl/main_test.go
Normal file
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@ -0,0 +1,265 @@
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package proxyssl
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import (
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"testing"
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api "k8s.io/api/core/v1"
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networking "k8s.io/api/networking/v1beta1"
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meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/intstr"
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"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
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"k8s.io/ingress-nginx/internal/ingress/errors"
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"k8s.io/ingress-nginx/internal/ingress/resolver"
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)
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func buildIngress() *networking.Ingress {
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defaultBackend := networking.IngressBackend{
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ServiceName: "default-backend",
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ServicePort: intstr.FromInt(80),
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}
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return &networking.Ingress{
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ObjectMeta: meta_v1.ObjectMeta{
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Name: "foo",
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Namespace: api.NamespaceDefault,
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},
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Spec: networking.IngressSpec{
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Backend: &networking.IngressBackend{
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ServiceName: "default-backend",
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ServicePort: intstr.FromInt(80),
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},
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Rules: []networking.IngressRule{
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{
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Host: "foo.bar.com",
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IngressRuleValue: networking.IngressRuleValue{
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HTTP: &networking.HTTPIngressRuleValue{
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Paths: []networking.HTTPIngressPath{
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{
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Path: "/foo",
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Backend: defaultBackend,
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},
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},
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},
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},
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},
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},
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},
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}
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}
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// mocks the resolver for proxySSL
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type mockSecret struct {
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resolver.Mock
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}
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// GetAuthCertificate from mockSecret mocks the GetAuthCertificate for backend certificate authentication
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func (m mockSecret) GetAuthCertificate(name string) (*resolver.AuthSSLCert, error) {
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if name != "default/demo-secret" {
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return nil, errors.Errorf("there is no secret with name %v", name)
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}
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return &resolver.AuthSSLCert{
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Secret: "default/demo-secret",
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CAFileName: "/ssl/ca.crt",
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PemSHA: "abc",
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}, nil
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}
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func TestAnnotations(t *testing.T) {
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ing := buildIngress()
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data := map[string]string{}
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data[parser.GetAnnotationWithPrefix("proxy-ssl-secret")] = "default/demo-secret"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-ciphers")] = "HIGH:-SHA"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-name")] = "$host"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-protocols")] = "TLSv1.3 SSLv2 TLSv1 TLSv1.2"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-server-name")] = "off"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-session-reuse")] = "off"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-verify")] = "on"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-verify-depth")] = "3"
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ing.SetAnnotations(data)
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fakeSecret := &mockSecret{}
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i, err := NewParser(fakeSecret).Parse(ing)
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if err != nil {
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t.Errorf("Uxpected error with ingress: %v", err)
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}
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u, ok := i.(*Config)
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if !ok {
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t.Errorf("expected *Config but got %v", u)
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}
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secret, err := fakeSecret.GetAuthCertificate("default/demo-secret")
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if err != nil {
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t.Errorf("unexpected error getting secret %v", err)
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}
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if u.AuthSSLCert.Secret != secret.Secret {
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t.Errorf("expected %v but got %v", secret.Secret, u.AuthSSLCert.Secret)
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}
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if u.Ciphers != "HIGH:-SHA" {
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t.Errorf("expected %v but got %v", "HIGH:-SHA", u.Ciphers)
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}
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if u.Protocols != "SSLv2 TLSv1 TLSv1.2 TLSv1.3" {
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t.Errorf("expected %v but got %v", "SSLv2 TLSv1 TLSv1.2 TLSv1.3", u.Protocols)
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}
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if u.Verify != "on" {
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t.Errorf("expected %v but got %v", "on", u.Verify)
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}
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if u.VerifyDepth != 3 {
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t.Errorf("expected %v but got %v", 3, u.VerifyDepth)
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}
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}
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func TestInvalidAnnotations(t *testing.T) {
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ing := buildIngress()
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fakeSecret := &mockSecret{}
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data := map[string]string{}
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// No annotation
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_, err := NewParser(fakeSecret).Parse(ing)
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if err == nil {
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t.Errorf("Expected error with ingress but got nil")
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}
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// Invalid NameSpace
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data[parser.GetAnnotationWithPrefix("proxy-ssl-secret")] = "demo-secret"
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ing.SetAnnotations(data)
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_, err = NewParser(fakeSecret).Parse(ing)
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if err == nil {
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t.Errorf("Expected error with ingress but got nil")
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}
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// Invalid Proxy Certificate
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data[parser.GetAnnotationWithPrefix("proxy-ssl-secret")] = "default/invalid-demo-secret"
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ing.SetAnnotations(data)
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_, err = NewParser(fakeSecret).Parse(ing)
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if err == nil {
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t.Errorf("Expected error with ingress but got nil")
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}
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// Invalid optional Annotations
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data[parser.GetAnnotationWithPrefix("proxy-ssl-secret")] = "default/demo-secret"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-protocols")] = "TLSv111 SSLv1"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-server-name")] = "w00t"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-session-reuse")] = "w00t"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-verify")] = "w00t"
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data[parser.GetAnnotationWithPrefix("proxy-ssl-verify-depth")] = "abcd"
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ing.SetAnnotations(data)
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i, err := NewParser(fakeSecret).Parse(ing)
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if err != nil {
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t.Errorf("Uxpected error with ingress: %v", err)
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}
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u, ok := i.(*Config)
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if !ok {
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t.Errorf("expected *Config but got %v", u)
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}
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if u.Protocols != defaultProxySSLProtocols {
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t.Errorf("expected %v but got %v", defaultProxySSLProtocols, u.Protocols)
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}
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if u.Verify != defaultProxySSLVerify {
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t.Errorf("expected %v but got %v", defaultProxySSLVerify, u.Verify)
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}
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if u.VerifyDepth != defaultProxySSLVerifyDepth {
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t.Errorf("expected %v but got %v", defaultProxySSLVerifyDepth, u.VerifyDepth)
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}
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}
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func TestEquals(t *testing.T) {
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cfg1 := &Config{}
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cfg2 := &Config{}
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// Same config
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result := cfg1.Equal(cfg1)
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if result != true {
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t.Errorf("Expected true")
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}
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// compare nil
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result = cfg1.Equal(nil)
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if result != false {
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t.Errorf("Expected false")
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}
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// Different Certs
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sslCert1 := resolver.AuthSSLCert{
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Secret: "default/demo-secret",
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CAFileName: "/ssl/ca.crt",
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PemSHA: "abc",
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}
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sslCert2 := resolver.AuthSSLCert{
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Secret: "default/other-demo-secret",
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CAFileName: "/ssl/ca.crt",
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PemSHA: "abc",
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}
|
||||
cfg1.AuthSSLCert = sslCert1
|
||||
cfg2.AuthSSLCert = sslCert2
|
||||
result = cfg1.Equal(cfg2)
|
||||
if result != false {
|
||||
t.Errorf("Expected false")
|
||||
}
|
||||
cfg2.AuthSSLCert = sslCert1
|
||||
|
||||
// Different Ciphers
|
||||
cfg1.Ciphers = "DEFAULT"
|
||||
cfg2.Ciphers = "HIGH:-SHA"
|
||||
result = cfg1.Equal(cfg2)
|
||||
if result != false {
|
||||
t.Errorf("Expected false")
|
||||
}
|
||||
cfg2.Ciphers = "DEFAULT"
|
||||
|
||||
// Different Protocols
|
||||
cfg1.Protocols = "SSLv2 TLSv1 TLSv1.2 TLSv1.3"
|
||||
cfg2.Protocols = "SSLv3 TLSv1 TLSv1.2 TLSv1.3"
|
||||
result = cfg1.Equal(cfg2)
|
||||
if result != false {
|
||||
t.Errorf("Expected false")
|
||||
}
|
||||
cfg2.Protocols = "SSLv2 TLSv1 TLSv1.2 TLSv1.3"
|
||||
|
||||
// Different Verify
|
||||
cfg1.Verify = "off"
|
||||
cfg2.Verify = "on"
|
||||
result = cfg1.Equal(cfg2)
|
||||
if result != false {
|
||||
t.Errorf("Expected false")
|
||||
}
|
||||
cfg2.Verify = "off"
|
||||
|
||||
// Different VerifyDepth
|
||||
cfg1.VerifyDepth = 1
|
||||
cfg2.VerifyDepth = 2
|
||||
result = cfg1.Equal(cfg2)
|
||||
if result != false {
|
||||
t.Errorf("Expected false")
|
||||
}
|
||||
cfg2.VerifyDepth = 1
|
||||
|
||||
// Equal Configs
|
||||
result = cfg1.Equal(cfg2)
|
||||
if result != true {
|
||||
t.Errorf("Expected true")
|
||||
}
|
||||
}
|
||||
|
|
@ -481,6 +481,17 @@ func (n *NGINXController) getBackendServers(ingresses []*ingress.Ingress) ([]*in
|
|||
server.Hostname, ingKey)
|
||||
}
|
||||
|
||||
if server.ProxySSL.CAFileName == "" {
|
||||
server.ProxySSL = anns.ProxySSL
|
||||
if server.ProxySSL.Secret != "" && server.ProxySSL.CAFileName == "" {
|
||||
klog.V(3).Infof("Secret %q has no 'ca.crt' key, client cert authentication disabled for Ingress %q",
|
||||
server.ProxySSL.Secret, ingKey)
|
||||
}
|
||||
} else {
|
||||
klog.V(3).Infof("Server %q is already configured for client cert authentication (Ingress %q)",
|
||||
server.Hostname, ingKey)
|
||||
}
|
||||
|
||||
if rule.HTTP == nil {
|
||||
klog.V(3).Infof("Ingress %q does not contain any HTTP rule, using default backend", ingKey)
|
||||
continue
|
||||
|
|
|
|||
|
|
@ -684,6 +684,7 @@ func (s *k8sStore) updateSecretIngressMap(ing *networkingv1beta1.Ingress) {
|
|||
secretAnnotations := []string{
|
||||
"auth-secret",
|
||||
"auth-tls-secret",
|
||||
"proxy-ssl-secret",
|
||||
}
|
||||
for _, ann := range secretAnnotations {
|
||||
secrKey, err := objectRefAnnotationNsKey(ann, ing)
|
||||
|
|
|
|||
|
|
@ -33,6 +33,7 @@ import (
|
|||
"k8s.io/ingress-nginx/internal/ingress/annotations/luarestywaf"
|
||||
"k8s.io/ingress-nginx/internal/ingress/annotations/modsecurity"
|
||||
"k8s.io/ingress-nginx/internal/ingress/annotations/proxy"
|
||||
"k8s.io/ingress-nginx/internal/ingress/annotations/proxyssl"
|
||||
"k8s.io/ingress-nginx/internal/ingress/annotations/ratelimit"
|
||||
"k8s.io/ingress-nginx/internal/ingress/annotations/redirect"
|
||||
"k8s.io/ingress-nginx/internal/ingress/annotations/rewrite"
|
||||
|
|
@ -188,6 +189,9 @@ type Server struct {
|
|||
// CertificateAuth indicates the this server requires mutual authentication
|
||||
// +optional
|
||||
CertificateAuth authtls.Config `json:"certificateAuth"`
|
||||
// ProxySSL indicates the this server uses client certificate to access backends
|
||||
// +optional
|
||||
ProxySSL proxyssl.Config `json:"proxySSL"`
|
||||
// ServerSnippet returns the snippet of server
|
||||
// +optional
|
||||
ServerSnippet string `json:"serverSnippet"`
|
||||
|
|
@ -273,6 +277,10 @@ type Location struct {
|
|||
// to be used in connections against endpoints
|
||||
// +optional
|
||||
Proxy proxy.Config `json:"proxy,omitempty"`
|
||||
// ProxySSL contains information about SSL configuration parameters
|
||||
// to be used in connections against endpoints
|
||||
// +optional
|
||||
ProxySSL proxyssl.Config `json:"proxySSL,omitempty"`
|
||||
// UsePortInRedirects indicates if redirects must specify the port
|
||||
// +optional
|
||||
UsePortInRedirects bool `json:"usePortInRedirects"`
|
||||
|
|
|
|||
|
|
@ -864,6 +864,17 @@ stream {
|
|||
{{ end }}
|
||||
{{ end }}
|
||||
|
||||
{{ if not (empty $server.ProxySSL.CAFileName) }}
|
||||
# PEM sha: {{ $server.ProxySSL.PemSHA }}
|
||||
proxy_ssl_certificate {{ $server.ProxySSL.CAFileName }};
|
||||
proxy_ssl_certificate_key {{ $server.ProxySSL.CAFileName }};
|
||||
proxy_ssl_trusted_certificate {{ $server.ProxySSL.CAFileName }};
|
||||
proxy_ssl_ciphers {{ $server.ProxySSL.Ciphers }};
|
||||
proxy_ssl_protocols {{ $server.ProxySSL.Protocols }};
|
||||
proxy_ssl_verify {{ $server.ProxySSL.Verify }};
|
||||
proxy_ssl_verify_depth {{ $server.ProxySSL.VerifyDepth }};
|
||||
{{ end }}
|
||||
|
||||
{{ if not (empty $server.SSLCiphers) }}
|
||||
ssl_ciphers {{ $server.SSLCiphers }};
|
||||
{{ end }}
|
||||
|
|
|
|||
Loading…
Reference in a new issue