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/**
* ============LICENSE_START====================================================
* org.onap.aaf
* ===========================================================================
* Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
* ===========================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END====================================================
*
*/
package org.onap.aaf.auth.cm.ca;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.Principal;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.bouncycastle.asn1.x500.style.BCStyle;
import org.onap.aaf.auth.cm.cert.CSRMeta;
import org.onap.aaf.auth.cm.cert.RDN;
import org.onap.aaf.cadi.Access;
import org.onap.aaf.cadi.Access.Level;
import org.onap.aaf.cadi.cm.CertException;
import org.onap.aaf.misc.env.Trans;
import org.onap.aaf.misc.env.util.Split;
public abstract class CA {
private static final String MUST_EXIST_TO_CREATE_CSRS_FOR = " must exist to create CSRs for ";
//TODO figuring out what is an Issuing CA is a matter of convention. Consider SubClassing for Open Source
public static final String ISSUING_CA = "Issuing CA";
public static final String CM_CA_PREFIX = "cm_ca.";
public static final String CM_CA_BASE_SUBJECT = ".baseSubject";
protected static final String CM_PUBLIC_DIR = "cm_public_dir";
private static final String CM_TRUST_CAS = "cm_trust_cas";
protected static final String CM_BACKUP_CAS = "cm_backup_cas";
public static final Set<String> EMPTY = Collections.unmodifiableSet(new HashSet<String>());
private final String name,env;
private MessageDigest messageDigest;
private final String permType;
private Set<String> caIssuerDNs;
private final ArrayList<String> idDomains;
private String[] trustedCAs;
private List<RDN> rdns;
protected CA(Access access, String caName, String env) throws IOException, CertException {
trustedCAs = new String[4]; // starting array
this.name = caName;
this.env = env;
permType = access.getProperty(CM_CA_PREFIX + name + ".perm_type",null);
if(permType==null) {
throw new CertException(CM_CA_PREFIX + name + ".perm_type" + MUST_EXIST_TO_CREATE_CSRS_FOR + caName);
}
caIssuerDNs = new HashSet<String>();
String tag = CA.CM_CA_PREFIX+caName+CA.CM_CA_BASE_SUBJECT;
String fields = access.getProperty(tag, null);
if(fields==null) {
throw new CertException(tag + MUST_EXIST_TO_CREATE_CSRS_FOR + caName);
}
access.log(Level.INFO, tag, "=",fields);
for(RDN rdn : rdns = RDN.parse('/',fields)) {
if(rdn.aoi==BCStyle.EmailAddress) { // Cert Specs say Emails belong in Subject
throw new CertException("email address is not allowed in " + CM_CA_BASE_SUBJECT);
}
}
idDomains = new ArrayList<String>();
StringBuilder sb = null;
for(String s : Split.splitTrim(',', access.getProperty(CA.CM_CA_PREFIX+caName+".idDomains", ""))) {
if(s.length()>0) {
if(sb==null) {
sb = new StringBuilder();
} else {
sb.append(", ");
}
idDomains.add(s);
sb.append(s);
}
}
if(sb!=null) {
access.printf(Level.INIT, "CA '%s' supports Personal Certificates for %s", caName, sb);
}
String data_dir = access.getProperty(CM_PUBLIC_DIR,null);
if(data_dir!=null) {
File data = new File(data_dir);
byte[] bytes;
if(data.exists()) {
String trust_cas = access.getProperty(CM_TRUST_CAS,null);
if(trust_cas!=null) {
for(String fname : Split.splitTrim(',', trust_cas)) {
File crt = new File(data,fname);
if(crt.exists()) {
access.printf(Level.INIT, "Loading CA Cert from %s", crt.getAbsolutePath());
bytes = new byte[(int)crt.length()];
FileInputStream fis = new FileInputStream(crt);
try {
int read = fis.read(bytes);
if(read>0) {
addTrustedCA(new String(bytes));
}
} finally {
fis.close();
}
} else {
access.printf(Level.INIT, "FAILED to Load CA Cert from %s", crt.getAbsolutePath());
}
}
} else {
access.printf(Level.INIT, "Cannot load external TRUST CAs: No property %s",CM_TRUST_CAS);
}
} else {
access.printf(Level.INIT, "Cannot load external TRUST CAs: %s doesn't exist, or is not accessible",data.getAbsolutePath());
}
}
}
protected void addCaIssuerDN(String issuerDN) {
caIssuerDNs.add(issuerDN);
}
protected synchronized void addTrustedCA(final String crtString) {
String crt;
if(crtString.endsWith("\n")) {
crt = crtString;
} else {
crt = crtString + '\n';
}
for(int i=0;i<trustedCAs.length;++i) {
if(trustedCAs[i]==null) {
trustedCAs[i]=crt;
return;
}
}
String[] temp = new String[trustedCAs.length+5];
System.arraycopy(trustedCAs,0,temp, 0, trustedCAs.length);
temp[trustedCAs.length]=crt;
trustedCAs = temp;
}
public Set<String> getCaIssuerDNs() {
return caIssuerDNs;
}
public String[] getTrustedCAs() {
return trustedCAs;
}
public String getEnv() {
return env;
}
protected void setMessageDigest(MessageDigest md) {
messageDigest = md;
}
/*
* End Required Constructor calls
*/
public String getName() {
return name;
}
public String getPermType() {
return permType;
}
public abstract X509andChain sign(Trans trans, CSRMeta csrmeta) throws IOException, CertException;
/* (non-Javadoc)
* @see org.onap.aaf.auth.cm.ca.CA#inPersonalDomains(java.security.Principal)
*/
public boolean inPersonalDomains(Principal p) {
int at = p.getName().indexOf('@');
if(at>=0) {
return idDomains.contains(p.getName().substring(at+1));
} else {
return false;
}
}
public MessageDigest messageDigest() {
return messageDigest;
}
public CSRMeta newCSRMeta() {
return new CSRMeta(rdns);
}
}
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