7.4.2.4. Case IV: HSM to HSM Migration

Extract the public/private key pairs from the HSM. The format for the extracted key pairs should be portable, such as a PKCS #12 file.

The pk12util tool provided by the Certificate System cannot extract public/private key pairs from an HSM because of requirements in the FIPS 140-1 standard which protect the private key portion of an entry. To extract this information, contact the HSM vendor for more information. The extracted keys should not have any dependencies, such as nickname prefixes, on the HSM.

Copy the extracted key pairs from the old server to the new server.

cp old_server_root/alias/ServerCert.p12 
/var/lib/instance_ID/alias/ServerCert.p12

cp old_server_root/alias/kraStorageCert.p12 
/var/lib/instance_ID/alias/kraStorageCert.p12

cp old_server_root/alias/kraTransportCert.p12 
/var/lib/instance_ID/alias/kraTransportCert.p12

Extract the public key of the old_HSM_slot_name:caSigningCert cert-old_DRM_instance from the old security databases and save the base-64 encoded output to a file called caSigningCert.b64.
1. Open the old Certificate System's alias/ directory.
```
cd old_server_root/alias
```
2. Set the LD_LIBRARY_PATH environment variable to search the Certificate System libraries.
```
LD_LIBRARY_PATH=old_server_root/bin/cert/lib

export LD_LIBRARY_PATH
```
3. Use the old Certificate System certutil tool to identify the old HSM slot name.
```
old_server_root/bin/cert/tools/certutil -U -d .
```
4. Use the old Certificate System certutil tool to extract the public key and save the base-64 output to a file. In this example, the -L option lists the named certificate, the -n option names the certificate, -h gives the old HSM information, and -a saves the information to the base-64 file.
```
old_server_root/bin/cert/tools/certutil -L
 -n "old_HSM_slot_name:caSigningCert cert-old_DRM_instance"
 -d . -h old_HSM_token_name -a > caSigningCert.b64
```
5. Copy the base-64 file from the old server to the new server.
```
cp old_server_root/alias/caSigningCert.b64 
/var/lib/instance_ID/alias/caSigningCert.b64
```
Log into the new server as the Certificate System user, and open the Certificate System alias/ directory.
```
cd /var/lib/instance_ID/alias/
```

su

chown user:group ServerCert.p12

chown user:group kraStorageCert.p12

chown user:group kraTransportCert.p12

chown user:group caSigningCert.b64

Log out as root. As the Certificate System user, set the file permissions.

chmod 00600 ServerCert.p12

chmod 00600 kraStorageCert.p12

chmod 00600 kraTransportCert.p12

chmod 00600 caSigningCert.b64

modutil -nocertdb -dbdir . -add new_HSM_token_name -libfile new_HSM_library_path/new_HSM_library

Identify the new HSM slot name.
```
modutil -dbdir . -nocertdb -list
```

Import the public/private key pairs of each entry from the PKCS #12 files into the new HSM.

pk12util -i ServerCert.p12 -d . -h new_HSM_slot_name

Enter Password or Pin for "new_HSM_slot_name":********
Enter password for PKCS12 file: ********
pk12util: PKCS12 IMPORT SUCCESSFUL

pk12util -i kraStorageCert.p12 -d . -h new_HSM_slot_name

Enter Password or Pin for "new_HSM_slot_name":********
Enter password for PKCS12 file: ********
pk12util: PKCS12 IMPORT SUCCESSFUL

pk12util -i kraTransportCert.p12 -d . -h new_HSM_slot_name

Enter Password or Pin for "new_HSM_slot_name":********
Enter password for PKCS12 file: ********
pk12util: PKCS12 IMPORT SUCCESSFUL

Optionally, delete the PKCS #12 files.

rm ServerCert.p12

rm kraStorageCert.p12

rm kraTransportCert.p12

Set the trust bits on the public/private key pairs that were imported into the new HSM.

certutil -M -n "new_HSM_slot_name:Server-Cert cert-old_DRM_instance" 
-t "cu,cu,cu" -d . -h new_HSM_token_name

certutil -M -n "new_HSM_slot_name:kraStorageCert cert-old_DRM_instance" 
-t "u,u,u" -d . -h new_HSM_token_name

certutil -M -n "new_HSM_slot_name:kraTransportCert cert-old_DRM_instance" 
-t "u,u,u" -d . -h new_HSM_token_name

Import the public key from the base-64 file into the new HSM, and set the trust bits.

certutil -A -n "new_HSM_slot_name:caSigningCert cert-old_DRM_instance"
 -t "CT,c," -d . -h new_HSM_token_name -i caSigningCert.b64

Optionally, delete the base-64 file.
```
rm caSigningCert.b64
```

Open the CS.cfg configuration file.

cd /var/lib/instance_ID/conf/

vi CS.cfg

Edit the kra.storageUnit.nickname and kra.transportUnit.nickname attributes to reflect the new HSM information.

kra.storageUnit.nickname=
 new_HSM_slot_name:kraStorageCert cert-old_DRM_instance
kra.transportUnit.nickname=
 new_HSM_slot_name:kraTransportCert cert-old_DRM_instance

NOTE

The caSigningCert is not referenced in the CS.cfg file.

In the same directory, edit the serverCertNick.conf file to contain the old certificate nickname. For example:
```
vi serverCertNick.confnew_HSM_slot_name:Server-Cert cert-old_DRM_instance
```