Installing Keys on the Client

For a more secure WAN boot installation or an insecure installation with data integrity checking, you must install keys on the client. By using a hashing key and an encryption key, you can protect the data that is transmitted to the client. You can install these keys in the following ways.

• Set OBP variables – You can assign key values to OBP network boot argument variables before you boot the client. These keys can then be used for future WAN boot installations of the client.

• Enter the key values during the boot process – You can set key values at the wanboot program boot> prompt. If you use this method to install keys, the keys are only used for the current WAN boot installation.

You can also install keys in the OBP of a running client. If you want to install keys on a running client, the system must be running the Solaris 9 12/03 OS, or compatible version.

When you install keys on your client, ensure that the key values are not transmitted over an insecure connection. Follow your site's security policies to ensure the privacy of the key values.

• For instructions about how to assign key values to OBP network boot argument variables, see To Install Keys in the Client OBP.

• For instructions about how to install keys during the boot process, see To Perform an Interactive WAN Boot Installation.

• For instructions about how to install keys in the OBP of a running client, see To Install a Hashing Key and an Encryption Key on a Running Client.

To Install Keys in the Client OBP

You can assign key values to OBP network boot argument variables before you boot the client. These keys can then be used for future WAN boot installations of the client.

To install keys in the client OBP, follow these steps.

If you want to assign key values to OBP network boot argument variables, follow these steps.

1. Assume the same user role as the web server user on the WAN boot server.

2. Display the key value for each client key.

   # wanbootutil keygen -d -c -o net=net-ip,cid=client-ID,type=key-type

   net-ip

   The IP address of the client's subnet.

   client-ID

   The ID of the client you want to install. The client ID can be a user-defined ID or the DHCP client ID.

   key-type

   The key type you want to install on the client. Valid key types are 3des, aes, or sha1.

   The hexadecimal value for the key is displayed.

3. Repeat the previous step for each type of client key you want to install.

4. Bring the client system to run level 0.

   # init 0

   The ok prompt is displayed.

5. At the client ok prompt, set the value for the hashing key.

   ok set-security-key wanboot-hmac-sha1 key-value

   set-security-key

   Installs the key on the client

   wanboot-hmac-sha1

   Instructs OBP to install a HMAC SHA1 hashing key

   key-value

   Specifies the hexadecimal string that is displayed in Step 2.

   The HMAC SHA1 hashing key is installed in the client OBP.

6. At the client ok prompt, install the encryption key.

   ok set-security-key wanboot-3des key-value

   set-security-key

   Installs the key on the client

   wanboot-3des

   Instructs OBP to install a 3DES encryption key. If you want to use an AES encryption key, set this value to wanboot-aes.

   key-value

   Specifies the hexadecimal string that represents the encryption key.

   The 3DES encryption key is installed in the client OBP.

   After you install the keys, you are ready to install the client. See Installing the Client for instructions about how to install the client system.

7. (Optional) Verify that the keys are set in the client OBP.

   ok list-security-keys Security Keys: wanboot-hmac-sha1 wanboot-3des

8. (Optional) If you need to delete a key, type the following command.

   ok set-security-key key-type

   key-type

   Specifies the type of key you need to delete. Use the value wanboot-hmac-sha1, wanboot-3des, or wanboot-aes.

Example 12–2 Installing Keys in the Client OBP

The following example shows how to install a hashing key and an encryption key in the client OBP.

Display the key values on the WAN boot server.

# wanbootutil keygen -d -c -o net=192.168.198.0,cid=010003BA152A42,type=sha1
b482aaab82cb8d5631e16d51478c90079cc1d463
# wanbootutil keygen -d -c -o net=192.168.198.0,cid=010003BA152A42,type=3des
9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04

The previous example uses the following information.

net=192.168.198.0

Specifies the IP address of the client's subnet

cid=010003BA152A42

Specifies the client's ID

b482aaab82cb8d5631e16d51478c90079cc1d463

Specifies the value of the client's HMAC SHA1 hashing key

9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04

Specifies the value of the client's 3DES encryption key

If you use an AES encryption key in your installation, change wanboot-3des to wanboot-aes to display the encryption key value.

Install the keys on the client system.

ok set-security-key wanboot-hmac-sha1 b482aaab82cb8d5631e16d51478c90079cc1d463
ok set-security-key wanboot-3des 9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04

The previous commands perform the following tasks.

• Installs the HMAC SHA1 hashing key with a value of b482aaab82cb8d5631e16d51478c90079cc1d463 on the client

• Installs the 3DES encryption key with a value of 9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04 on the client

  If you use an AES encryption key in your installation, change wanboot-3des to wanboot-aes.

Continuing the WAN Boot Installation

After you install keys on your client, you are ready to install the client over the WAN. For instructions, see Installing the Client.

See Also

For more information about how to display key values, see the man page wanbootutil(1M).

To Install a Hashing Key and an Encryption Key on a Running Client

You can set key values at the wanboot program boot> prompt on a running system. If you use this method to install keys, the keys are only used for the current WAN boot installation.

If you want to install a hashing key and an encryption key in the OBP of a running client, follow these steps.

Before You Begin

This procedure makes the following assumptions.

• The client system is powered on.

• The client is accessible over a secure connection, such as a secure shell (ssh).

1. Assume the same user role as the web server user on the WAN boot server.

2. Display the key value for the client keys.

   # wanbootutil keygen -d -c -o net=net-ip,cid=client-ID,type=key-type

   net-ip

   The IP address of the client's subnet.

   client-ID

   The ID of the client you want to install. The client ID can be a user-defined ID or the DHCP client ID.

   key-type

   The key type you want to install on the client. Valid key types are 3des, aes, or sha1.

   The hexadecimal value for the key is displayed.

3. Repeat the previous step for each type of client key you want to install.

4. Become superuser or assume an equivalent role on the client machine.

5. Install the necessary keys on the running client machine.

   # /usr/lib/inet/wanboot/ickey -o type=key-type > key-value

   key-type

   Specifies the key type you want to install on the client. Valid key types are 3des, aes, or sha1.

   key-value

   Specifies the hexadecimal string that is displayed in Step 2.

6. Repeat the previous step for each type of client key you want to install.

   After you install the keys, you are ready to install the client. See Installing the Client for instructions about how to install the client system.

Example 12–3 Installing Keys in the OBP of a Running Client System

The following example shows how to install keys in the OBP of a running client.

Display the key values on the WAN boot server.

# wanbootutil keygen -d -c -o net=192.168.198.0,cid=010003BA152A42,type=sha1
b482aaab82cb8d5631e16d51478c90079cc1d463
# wanbootutil keygen -d -c -o net=192.168.198.0,cid=010003BA152A42,type=3des
9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04

The previous example uses the following information.

net=192.168.198.0

Specifies the IP address of the client's subnet

cid=010003BA152A42

Specifies the client's ID

b482aaab82cb8d5631e16d51478c90079cc1d463

Specifies the value of the client's HMAC SHA1 hashing key

9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04

Specifies the value of the client's 3DES encryption key

If you use an AES encryption key in your installation, change type=3des to type=aes to display the encryption key value.

Install the keys in the OBP of the running client.

# /usr/lib/inet/wanboot/ickey -o type=sha1 b482aaab82cb8d5631e16d51478c90079cc1d463
# /usr/lib/inet/wanboot/ickey -o type=3des 9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04

The previous commands perform the following tasks.

• Installs a HMAC SHA1 hashing key with a value of b482aaab82cb8d5631e16d51478c90079cc1d463 on the client

• Installs a 3DES encryption key with a value of 9ebc7a57f240e97c9b9401e9d3ae9b292943d3c143d07f04 on the client

Continuing the WAN Boot Installation

After you install keys on your client, you are ready to install the client over the WAN. For instructions, see Installing the Client.

See Also

For more information about how to display key values, see the man page wanbootutil(1M).

For additional information about how to install keys on a running system, see ickey(1M).