Merge pull request #57 from opendistro/generate-certificates

Adds content on generating your own certificates

Author: aetter

docs/install/docker-security.md

@@ -74,6 +74,7 @@ services:
       - "5601"
     environment:
       ELASTICSEARCH_URL: https://odfe-node1:9200
+      ELASTICSEARCH_HOSTS: https://odfe-node1:9200
     volumes:
       - ./custom-kibana.yml:/usr/share/kibana/config/kibana.yml
     networks:

docs/install/docker.md

@@ -126,6 +126,7 @@ services:
       - "5601"
     environment:
       ELASTICSEARCH_URL: https://odfe-node1:9200
+      ELASTICSEARCH_HOSTS: https://odfe-node1:9200
     networks:
       - odfe-net
 

docs/security/cross-cluster-search.md

@@ -2,7 +2,7 @@
 layout: default
 title: Cross-Cluster Search
 parent: Security
-nav_order: 11
+nav_order: 30
 ---
 
 # Cross-cluster search

docs/security/default-action-groups.md

@@ -2,7 +2,7 @@
 layout: default
 title: Default Action Groups
 parent: Security
-nav_order: 8
+nav_order: 20
 ---
 
 # Default action groups

docs/security/disable.md

@@ -51,5 +51,6 @@ If you disable the Security plugin in `elasticsearch.yml` (or delete the plugin
 
 1. In `docker-compose.yml`, change `amazon/opendistro-for-elasticsearch-kibana:0.9.0` to `kibana-no-security`.
 1. Change `ELASTICSEARCH_URL` (`docker-compose.yml`) or `elasticsearch.url` (your custom `kibana.yml`) to `http://` rather than `https://`.
+1. Change `ELASTICSEARCH_HOSTS` or `elasticsearch.hosts` to `http://` rather than `https://`.
 1. Remove all `opendistro_security` lines from `kibana.yml`.
 1. `docker-compose up`.

docs/security/document-level-security.md

@@ -2,7 +2,7 @@
 layout: default
 title: Document-Level Security
 parent: Security
-nav_order: 10
+nav_order: 22
 ---
 
 # Document-level security

docs/security/generate-certificates.md

@@ -0,0 +1,196 @@
+---
+layout: default
+title: Generate Certificates
+parent: Security
+nav_order: 5
+---
+
+# Generate certificates
+
+If you don't have access to a certificate authority (CA) for your organization and want to use Open Distro for Elasticsearch for non-demo purposes, you can generate your own self-signed certificates using [OpenSSL](https://www.openssl.org/){:target='\_blank'}.
+
+You can probably find OpenSSL in the package manager for your operating system.
+
+On CentOS, use Yum:
+
+```bash
+sudo yum install openssl
+```
+
+On macOS, use [Homebrew](https://brew.sh/){:target='\_blank'}:
+
+```bash
+brew install openssl
+```
+
+
+---
+
+#### Table of contents
+1. TOC
+{:toc}
+
+
+---
+
+## Generate private key
+
+The first step in this process is to generate a private key using the `genrsa` command. As the name suggests, you should keep this file private.
+
+Private keys need to be of sufficient length in order to be secure, so specify `2048`:
+
+```bash
+openssl genrsa -out root-ca-key.pem 2048
+```
+
+If desired, add the `-aes256` option to encrypt the key using the AES-256 standard. This option requires a password.
+
+
+## Generate root certificate
+
+Next, use the key to generate a self-signed certificate for the root CA:
+
+```bash
+openssl req -new -x509 -sha256 -key root-ca-key.pem -out root-ca.pem
+```
+
+- The `-x509` option specifies that you want a self-signed certificate rather than a certificate request.
+- The `-sha256` option sets the hash algorithm to SHA-256. SHA-256 is the default in newer versions of OpenSSL, but older versions might use SHA-1.
+- Optionally, add `-days 3650` (10 years) or some other number of days to set an expiration date.
+
+Specify details for your organization as prompted. Together, these details form the Distinguished Name (DN) of your CA.
+
+
+## Generate admin certificate
+
+To generate an admin certificate, first create a new key:
+
+```bash
+openssl genrsa -out admin-key-temp.pem 2048
+```
+
+Then convert that key to PKCS#8 format for use in Java using a PKCS#12-compatible algorithm (3DES):
+
+```bash
+openssl pkcs8 -inform PEM -outform PEM -in admin-key-temp.pem -topk8 -nocrypt -v1 PBE-SHA1-3DES -out admin-key.pem
+```
+
+Next, create a certificate signing request (CSR). This file acts as an application to a CA for a signed certificate:
+
+```bash
+openssl req -new -key admin-key.pem -out admin.csr
+```
+
+Fill in the details as prompted. You don't need to specify a challenge password. As noted in the [OpenSSL Cookbook](https://www.feistyduck.com/books/openssl-cookbook/){:target='\_blank'}, "Having a challenge password does not increase the security of the CSR in any way."
+
+Finally, generate the certificate itself:
+
+```bash
+openssl x509 -req -in admin.csr -CA root-ca.pem -CAkey root-ca-key.pem -CAcreateserial -sha256 -out admin.pem
+```
+
+
+## (Optional) Generate node and client certificates
+
+Follow the steps in [Generate admin certificates](#generate-admin-certificate) with new file names to generate a new certificate for each node and as many client certificates as you need. Each certificate should use its own private key.
+
+If you generate node certificates and have `opendistro_security.ssl.transport.enforce_hostname_verification` set to `true` (default), be sure to specify a Common Name (CN) for the certificate that matches the hostname of the intended node. If you want to use the same node certificate on all nodes (not recommended), set hostname verification to `false`. To learn more, see [Configure TLS certificates](../../security/tls-configuration/#advanced-hostname-verification-and-dns-lookup).
+
+
+### Sample script
+
+```bash
+# Root CA
+openssl genrsa -out root-ca-key.pem 2048
+openssl req -new -x509 -sha256 -key root-ca-key.pem -out root-ca.pem
+# Admin cert
+openssl genrsa -out admin-key-temp.pem 2048
+openssl pkcs8 -inform PEM -outform PEM -in admin-key-temp.pem -topk8 -nocrypt -v1 PBE-SHA1-3DES -out admin-key.pem
+openssl req -new -key admin-key.pem -out admin.csr
+openssl x509 -req -in admin.csr -CA root-ca.pem -CAkey root-ca-key.pem -CAcreateserial -sha256 -out admin.pem
+# Node cert
+openssl genrsa -out node-key-temp.pem 2048
+openssl pkcs8 -inform PEM -outform PEM -in node-key-temp.pem -topk8 -nocrypt -v1 PBE-SHA1-3DES -out node-key.pem
+openssl req -new -key node-key.pem -out node.csr
+openssl x509 -req -in node.csr -CA root-ca.pem -CAkey root-ca-key.pem -CAcreateserial -sha256 -out node.pem
+# Cleanup
+rm admin-key-temp.pem
+rm admin.csr
+rm node-key-temp.pem
+rm node.csr
+```
+
+
+## Get Distinguished Names
+
+If you created admin and node certificates, you need to specify their DNs in `elasticsearch.yml`:
+
+```yml
+opendistro_security.authcz.admin_dn:
+  - 'CN=ADMIN,OU=UNIT,O=ORG,L=TORONTO,ST=ONTARIO,C=CA'
+opendistro_security.nodes_dn:
+  - 'CN=node1.example.com,OU=UNIT,O=ORG,L=TORONTO,ST=ONTARIO,C=CA'
+```
+
+But if you look at the `subject` of the certificate after creating it, you might see different formatting:
+
+```
+subject=/C=CA/ST=ONTARIO/L=TORONTO/O=ORG/OU=UNIT/CN=node1.example.com
+```
+
+If you compare this string to the ones in `elasticsearch.yml` above, you can see that you need to invert the order of elements and use commas rather than slashes. To get the string you need:
+
+```bash
+openssl x509 -subject -nameopt RFC2253 -noout -in node.pem
+```
+
+Then you can copy and paste the output:
+
+```
+subject= CN=node1.example.com,OU=UNIT,O=ORG,L=TORONTO,ST=ONTARIO,C=CA
+```
+
+
+## Configure certificates
+
+This process generates many files, but the ones you need to add to your cluster configuration are:
+
+- `root-ca.pem`
+- `admin.pem`
+- `admin-key.pem`
+- (Optional) `node.pem`
+- (Optional) `node-key.pem`
+
+For information on adding and configuring these certificates, see [Docker security configuration](../../install/docker-security/) and [Configure TLS certificates](../tls-configuration).
+
+
+## Run securityadmin.sh
+
+After configuring your certificates and starting Elasticsearch, run `securityadmin.sh` to initialize the Security plugin:
+
+```
+./securityadmin.sh -cd ../securityconfig/ -icl -nhnv -cacert ../../../config/root-ca.pem -cert ../../../config/admin.pem -key ../../../config/admin-key.pem
+```
+
+For more information about what this command does, see [Apply configuration changes](../security-admin/) and [Change passwords for read-only users](../../install/docker-security/#change-passwords-for-read-only-users).
+{: .tip }
+
+If you're using Docker, see [Bash access to containers](../../install/docker/#bash-access-to-containers).
+
+
+## Kibana
+
+Depending on your settings in `kibana.yml`, you might need to add `root-ca.pem` to your Kibana node, as well. You have two options: disable SSL verification or add the root CA.
+
+- Disable SSL verification:
+
+  ```yml
+  elasticsearch.ssl.verificationMode: none
+  ```
+
+- Add root CA:
+
+  ```yml
+  elasticsearch.ssl.certificateAuthorities: ["/usr/share/kibana/config/root-ca.pem"]
+  elasticsearch.ssl.verificationMode: full
+  ```

docs/security/ldap.md

@@ -2,7 +2,7 @@
 layout: default
 title: Active Directory and LDAP
 parent: Security
-nav_order: 5
+nav_order: 10
 ---
 
 # Active Directory and LDAP

docs/security/openid-connect.md

@@ -2,7 +2,7 @@
 layout: default
 title: OpenID Connect
 parent: Security
-nav_order: 7
+nav_order: 12
 ---
 
 # OpenID Connect

docs/security/permissions.md

@@ -2,7 +2,7 @@
 layout: default
 title: Permissions
 parent: Security
-nav_order: 9
+nav_order: 21
 ---
 
 # Permissions