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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2019 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.appc.data.services.db;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import javax.sql.rowset.CachedRowSet;
import org.apache.commons.lang3.StringUtils;
import org.onap.ccsdk.sli.core.dblib.DbLibService;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
public class CtxParameterizedResolver {
private static String cryptKey = "QtfJMKggVk";
private static final EELFLogger log = EELFManager.getInstance().getLogger(CtxParameterizedResolver.class);
protected static String resolveCtxVars(String key, SvcLogicContext ctx, ArrayList<String> arguments) {
if (key == null) {
return (null);
}
if (key.startsWith("'") && key.endsWith("'")) {
key = key.substring(1, key.length() - 1);
log.debug("Stripped outer single quotes - key is now [" + key + "]");
}
String[] keyTerms = key.split("\\s+");
StringBuffer sqlBuffer = new StringBuffer();
for (int i = 0; i < keyTerms.length; i++) {
sqlBuffer.append(resolveTerm(keyTerms[i], ctx, arguments));
sqlBuffer.append(" ");
}
return (sqlBuffer.toString());
}
private static String resolveTerm(String term, SvcLogicContext ctx, ArrayList<String> arguments) {
if (term == null) {
return (null);
}
log.trace("resolveTerm: term is " + term);
if (term.startsWith("$") && (ctx != null)) {
// Resolve any index variables.
term = resolveCtxVariable(term.substring(1), ctx);
// Escape single quote
if (term != null) {
term = term.replaceAll("'", "''");
}
//valueOf will store null values as a String "null"
arguments.add(String.valueOf(term));
return "?";
} else {
return (term);
}
}
private static String resolveCtxVariable(String ctxVarName, SvcLogicContext ctx) {
if (ctxVarName.indexOf('[') == -1) {
// Ctx variable contains no arrays
if ("cryptKey".equals(ctxVarName)) {
// Handle crypt key as special case. If it's set as a context
// variable, use it. Otherwise, use
// configured crypt key.
String cryptKey = ctx.getAttribute(ctxVarName);
if ((cryptKey != null) && (cryptKey.length() > 0)) {
return (cryptKey);
} else {
return (cryptKey);
}
}
return (ctx.getAttribute(ctxVarName));
}
// Resolve any array references
StringBuffer sbuff = new StringBuffer();
String[] ctxVarParts = ctxVarName.split("\\[");
sbuff.append(ctxVarParts[0]);
for (int i = 1; i < ctxVarParts.length; i++) {
if (ctxVarParts[i].startsWith("$")) {
int endBracketLoc = ctxVarParts[i].indexOf("]");
if (endBracketLoc == -1) {
// Missing end bracket ... give up parsing
log.warn("Variable reference " + ctxVarName + " seems to be missing a ']'");
return (ctx.getAttribute(ctxVarName));
}
String idxVarName = ctxVarParts[i].substring(1, endBracketLoc);
String remainder = ctxVarParts[i].substring(endBracketLoc);
sbuff.append("[");
sbuff.append(ctx.getAttribute(idxVarName));
sbuff.append(remainder);
} else {
// Index is not a variable reference
sbuff.append("[");
sbuff.append(ctxVarParts[i]);
}
}
return (ctx.getAttribute(sbuff.toString()));
}
protected static void saveCachedRowSetToCtx(CachedRowSet results, SvcLogicContext ctx, String prefix, DbLibService dblibSvc)
throws SQLException {
if (ctx != null) {
if ((prefix != null) && prefix.endsWith("[]")) {
// Return an array.
String pfx = prefix.substring(0, prefix.length() - 2);
int idx = 0;
do {
ResultSetMetaData rsMeta = results.getMetaData();
int numCols = rsMeta.getColumnCount();
for (int i = 0; i < numCols; i++) {
String colValue = null;
String tableName = rsMeta.getTableName(i + 1);
if (rsMeta.getColumnType(i + 1) == java.sql.Types.VARBINARY) {
colValue = decryptColumn(tableName, rsMeta.getColumnName(i + 1), results.getBytes(i + 1),
dblibSvc);
} else {
colValue = results.getString(i + 1);
}
log.debug("Setting " + pfx + "[" + idx + "]."
+ rsMeta.getColumnLabel(i + 1).replaceAll("_", "-") + " = " + colValue);
ctx.setAttribute(pfx + "[" + idx + "]." + rsMeta.getColumnLabel(i + 1).replaceAll("_", "-"),
colValue);
}
idx++;
} while (results.next());
log.debug("Setting " + pfx + "_length = " + idx);
ctx.setAttribute(pfx + "_length", "" + idx);
} else {
ResultSetMetaData rsMeta = results.getMetaData();
int numCols = rsMeta.getColumnCount();
for (int i = 0; i < numCols; i++) {
String colValue = null;
String tableName = rsMeta.getTableName(i + 1);
if ("VARBINARY".equalsIgnoreCase(rsMeta.getColumnTypeName(i + 1))) {
colValue = decryptColumn(tableName, rsMeta.getColumnName(i + 1), results.getBytes(i + 1),
dblibSvc);
} else {
colValue = results.getString(i + 1);
}
if (prefix != null) {
log.debug("Setting " + prefix + "." + rsMeta.getColumnLabel(i + 1).replaceAll("_", "-") + " = "
+ colValue);
ctx.setAttribute(prefix + "." + rsMeta.getColumnLabel(i + 1).replaceAll("_", "-"), colValue);
} else {
log.debug("Setting " + rsMeta.getColumnLabel(i + 1).replaceAll("_", "-") + " = " + colValue);
ctx.setAttribute(rsMeta.getColumnLabel(i + 1).replaceAll("_", "-"), colValue);
}
}
}
}
}
private static String decryptColumn(String tableName, String colName, byte[] colValue, DbLibService dblibSvc) {
String strValue = new String(colValue);
if (StringUtils.isAsciiPrintable(strValue)) {
// If printable, not encrypted
return (strValue);
} else {
ResultSet results = null;
try (Connection conn = dblibSvc.getConnection();
PreparedStatement stmt = conn.prepareStatement("SELECT CAST(AES_DECRYPT(?, ?) AS CHAR(50)) FROM DUAL")) {
stmt.setBytes(1, colValue);
stmt.setString(2, cryptKey);
results = stmt.executeQuery();
if ((results != null) && results.next()) {
strValue = results.getString(1);
log.debug("Decrypted value is " + strValue);
} else {
log.warn("Cannot decrypt " + tableName + "." + colName);
}
} catch (Exception e) {
log.error("Caught exception trying to decrypt " + tableName + "." + colName, e);
}finally {
if (results != null) {
try {
results.close();
} catch (SQLException se) {
log.error("Caught exception trying to close ResultSet",se);
}
}
}
}
return (strValue);
}
}
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