Define E2EAdapterCA

Procedure

Create a RACF keyring for the E2E adapter to use it as keystore.
```
RACDCERT ID(E2EUSER) ADDRING(E2EAdapterKeyring)
```
Create a self-signed RSA key pair to act as a Certificate Authority (CA) certificate. A key pair consists of a public and a private key. "E2EAdapterCA" is the label or alias of the certificate.
```
RACDCERT GENCERT CERTAUTH SUBJECTSDN(CN('CA for E2EAdapter') 
O('IBM') OU('E2EAdapter') C('US')) SIZE(2048) WITHLABEL('E2EAdapterCA') 
NOTAFTER(DATE(2029-12-31))
```

Connect the CA certificate to the keyring.

RACDCERT ID(E2EUSER) CONNECT(RING(E2EAdapterKeyring) 
LABEL('E2EAdapterCA') CERTAUTH)

Create a personal certificate, signed by the CA certificate "E2EAdapterCA". Create an RSA key pair for the E2E adapter server signed by the CA certificate. The common name (CN) value is typically the host name of the z/OS LPAR, which hosts the E2E adapter. "E2EAdapterServerCert" is the alias of the personal certificate of the E2E adapter.
```
RACDCERT ID(E2EUSER) GENCERT SUBJECTSDN(CN('myServer.host.com') 
O('IBM')  OU('E2EAdapter')  C('US'))  SIZE(2048) SIGNWITH(CERTAUTH
LABEL('E2EAdapterCA')) WITHLABEL('E2EAdapterServerCert') 
NOTAFTER(DATE(2029-12-31))
```

Connect the personal certificate to the keyring.

RACDCERT ID(E2EUSER) CONNECT(RING(E2EAdapterKeyring)
LABEL('E2EAdapterServerCert'))

Verify that the keyring and certificates were created correctly.

RACDCERT ID(E2EUSER) LISTRING(E2EAdapterKeyring) 
RACDCERT CERTAUTH LIST(LABEL('E2EAdapterCA')) 
RACDCERT ID(E2EUSER) LIST(LABEL('E2EAdapterServerCert'))

The following screen capture shows the LISTRING response:

Ring:
     >E2EAdapterKeyring<
Certificate Label Name             Cert Owner      Usage       Default
--------------------------------   ------------    --------    -------
E2EAdapterCA                       CERTAUTH        CERTAUTH    NO
E2EAdapterServerCert               ID(E2EUSER)     PERSONAL    NO

Activate the RACF definition.
```
SETROPTS  RACLIST(DIGTCERT) REFRESH
```