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Add RSA support to TLS libraries#3135

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alpeb merged 2 commits intomasterfrom
alpeb/rsa
Jul 26, 2019
Merged

Add RSA support to TLS libraries#3135
alpeb merged 2 commits intomasterfrom
alpeb/rsa

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@alpeb alpeb commented Jul 24, 2019

Fixes #3131

Wrapped private keys into either PrivateKeyEC or PrivateKeyRSA to
provide different certificate matching logic and marshaling depending on
the block type.

You can test having an RSA cert for the proxy injector by applying this
patch:

$ diff -u chart/templates/proxy_injector-rbac.yaml ~/tmp/proxy_injector-rbac.yaml
--- chart/templates/proxy_injector-rbac.yaml    2019-07-24 14:34:43.570616936 -0500
+++ /home/alpeb/tmp/proxy_injector-rbac.yaml    2019-07-24 13:41:03.150285099 -0500
@@ -1,4 +1,5 @@
 {{with .Values -}}
+{{- $ca := genCA "linkerd-proxy-injector.linkerd.svc" 365 -}}
 ---
 ###
 ### Proxy Injector RBAC
@@ -60,8 +61,8 @@
     {{ .CreatedByAnnotation }}: {{ .CliVersion }}
 type: Opaque
 data:
-  crt.pem: {{ b64enc .ProxyInjector.CrtPEM }}
-  key.pem: {{ b64enc .ProxyInjector.KeyPEM }}
+  crt.pem: {{ b64enc $ca.Cert }}
+  key.pem: {{ b64enc $ca.Key }}
 ---
 apiVersion: admissionregistration.k8s.io/v1beta1
 kind: MutatingWebhookConfiguration
@@ -81,7 +82,7 @@
       name: linkerd-proxy-injector
       namespace: {{ .Namespace }}
       path: "/"
-    caBundle: {{ b64enc .ProxyInjector.CrtPEM }}
+    caBundle: {{ b64enc $ca.Cert }}
   failurePolicy: {{ .WebhookFailurePolicy }}
   rules:
   - operations: [ "CREATE" ]

This will replace the logic to generate the cert with a call to Helm's
genCA, which uses RSA.

Fixes #3131

Wrapped private keys into either `PrivateKeyEC` or `PrivateKeyRSA` to
provide different certificate matching logic and marshaling depending on
the block type.

You can test having an RSA cert for the proxy injector by applying this
patch:

```diff
$ diff -u chart/templates/proxy_injector-rbac.yaml ~/tmp/proxy_injector-rbac.yaml
--- chart/templates/proxy_injector-rbac.yaml    2019-07-24 14:34:43.570616936 -0500
+++ /home/alpeb/tmp/proxy_injector-rbac.yaml    2019-07-24 13:41:03.150285099 -0500
@@ -1,4 +1,5 @@
 {{with .Values -}}
+{{- $ca := genCA "linkerd-proxy-injector.linkerd.svc" 365 -}}
 ---
 ###
 ### Proxy Injector RBAC
@@ -60,8 +61,8 @@
     {{ .CreatedByAnnotation }}: {{ .CliVersion }}
 type: Opaque
 data:
-  crt.pem: {{ b64enc .ProxyInjector.CrtPEM }}
-  key.pem: {{ b64enc .ProxyInjector.KeyPEM }}
+  crt.pem: {{ b64enc $ca.Cert }}
+  key.pem: {{ b64enc $ca.Key }}
 ---
 apiVersion: admissionregistration.k8s.io/v1beta1
 kind: MutatingWebhookConfiguration
@@ -81,7 +82,7 @@
       name: linkerd-proxy-injector
       namespace: {{ .Namespace }}
       path: "/"
-    caBundle: {{ b64enc .ProxyInjector.CrtPEM }}
+    caBundle: {{ b64enc $ca.Cert }}
   failurePolicy: {{ .WebhookFailurePolicy }}
   rules:
   - operations: [ "CREATE" ]
```

This will replace the logic to generate the cert with a call to Helm's
`genCA`, which uses RSA.

Signed-off-by: Alejandro Pedraza <[email protected]>
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l5d-bot commented Jul 24, 2019

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thanks for providing the test diff, confirmed works! a couple nits then 🚢

Signed-off-by: Alejandro Pedraza <[email protected]>
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l5d-bot commented Jul 25, 2019

@alpeb alpeb mentioned this pull request Jul 26, 2019
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:electron: ➰ ⭐ LGTM

@alpeb alpeb merged commit 19a8c72 into master Jul 26, 2019
@alpeb alpeb deleted the alpeb/rsa branch July 26, 2019 16:55
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Add RSA support to TLS libraries

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