java/11 : java.base/sun/security/provider/PolicyParser.java

PolicyParser
https://openjdk.java.net/
GPLv2 + Classpath Exception
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.security.provider;

import java.io.*;
import java.security.GeneralSecurityException;
import java.security.Principal;
import java.util.*;
import javax.security.auth.x500.X500Principal;

import sun.security.util.Debug;
import sun.security.util.PropertyExpander;
import sun.security.util.LocalizedMessage;

The policy for a Java runtime (specifying
which permissions are available for code from various principals)
is represented as a separate
persistent configuration.  The configuration may be stored as a
flat ASCII file, as a serialized binary file of
the Policy class, or as a database.
The Java runtime creates one global Policy object, which is used to
represent the static policy configuration file.  It is consulted by
a ProtectionDomain when the protection domain initializes its set of
permissions.
The Policy init method parses the policy
configuration file, and then
populates the Policy object.  The Policy object is agnostic in that
it is not involved in making policy decisions.  It is merely the
Java runtime representation of the persistent policy configuration
file.
When a protection domain needs to initialize its set of
permissions, it executes code such as the following
to ask the global Policy object to populate a
Permissions object with the appropriate permissions:
 policy = Policy.getPolicy();
 Permissions perms = policy.getPermissions(protectiondomain)

The protection domain contains a CodeSource
object, which encapsulates its codebase (URL) and public key attributes.
It also contains the principals associated with the domain.
The Policy object evaluates the global policy in light of who the
principal is and what the code source is and returns an appropriate
Permissions object.
Author: Roland Schemers, Ram Marti
Since: 1.2/**
 * The policy for a Java runtime (specifying
 * which permissions are available for code from various principals)
 * is represented as a separate
 * persistent configuration.  The configuration may be stored as a
 * flat ASCII file, as a serialized binary file of
 * the Policy class, or as a database.
 *
 * <p>The Java runtime creates one global Policy object, which is used to
 * represent the static policy configuration file.  It is consulted by
 * a ProtectionDomain when the protection domain initializes its set of
 * permissions.
 *
 * <p>The Policy <code>init</code> method parses the policy
 * configuration file, and then
 * populates the Policy object.  The Policy object is agnostic in that
 * it is not involved in making policy decisions.  It is merely the
 * Java runtime representation of the persistent policy configuration
 * file.
 *
 * <p>When a protection domain needs to initialize its set of
 * permissions, it executes code such as the following
 * to ask the global Policy object to populate a
 * Permissions object with the appropriate permissions:
 * <pre>
 *  policy = Policy.getPolicy();
 *  Permissions perms = policy.getPermissions(protectiondomain)
 * </pre>
 *
 * <p>The protection domain contains a CodeSource
 * object, which encapsulates its codebase (URL) and public key attributes.
 * It also contains the principals associated with the domain.
 * The Policy object evaluates the global policy in light of who the
 * principal is and what the code source is and returns an appropriate
 * Permissions object.
 *
 * @author Roland Schemers
 * @author Ram Marti
 *
 * @since 1.2
 */

public class PolicyParser {

    private Vector<GrantEntry> grantEntries;
    private Map<String, DomainEntry> domainEntries;

    // Convenience variables for parsing
    private static final Debug debug = Debug.getInstance("parser",
                                                "\t[Policy Parser]");
    private StreamTokenizer st;
    private int lookahead;
    private boolean expandProp = false;
    private String keyStoreUrlString = null; // unexpanded
    private String keyStoreType = null;
    private String keyStoreProvider = null;
    private String storePassURL = null;

    private String expand(String value)
        throws PropertyExpander.ExpandException
    {
        return expand(value, false);
    }

    private String expand(String value, boolean encodeURL)
        throws PropertyExpander.ExpandException
    {
        if (!expandProp) {
            return value;
        } else {
            return PropertyExpander.expand(value, encodeURL);
        }
    }

    Creates a PolicyParser object.
/**
     * Creates a PolicyParser object.
     */

    public PolicyParser() {
        grantEntries = new Vector<GrantEntry>();
    }


    public PolicyParser(boolean expandProp) {
        this();
        this.expandProp = expandProp;
    }

    Reads a policy configuration into the Policy object using a
Reader object. 
Params: policy – the policy Reader object.
Throws: ParsingException – if the policy configuration contains
         a syntax error.
IOException – if an error occurs while reading the policy
         configuration./**
     * Reads a policy configuration into the Policy object using a
     * Reader object. <p>
     *
     * @param policy the policy Reader object.
     *
     * @exception ParsingException if the policy configuration contains
     *          a syntax error.
     *
     * @exception IOException if an error occurs while reading the policy
     *          configuration.
     */

    public void read(Reader policy)
        throws ParsingException, IOException
    {
        if (!(policy instanceof BufferedReader)) {
            policy = new BufferedReader(policy);
        }

        /**
         * Configure the stream tokenizer:
         *      Recognize strings between "..."
         *      Don't convert words to lowercase
         *      Recognize both C-style and C++-style comments
         *      Treat end-of-line as white space, not as a token
         */
        st   = new StreamTokenizer(policy);

        st.resetSyntax();
        st.wordChars('a', 'z');
        st.wordChars('A', 'Z');
        st.wordChars('.', '.');
        st.wordChars('0', '9');
        st.wordChars('_', '_');
        st.wordChars('$', '$');
        st.wordChars(128 + 32, 255);
        st.whitespaceChars(0, ' ');
        st.commentChar('/');
        st.quoteChar('\'');
        st.quoteChar('"');
        st.lowerCaseMode(false);
        st.ordinaryChar('/');
        st.slashSlashComments(true);
        st.slashStarComments(true);

        /**
         * The main parsing loop.  The loop is executed once
         * for each entry in the config file.      The entries
         * are delimited by semicolons.   Once we've read in
         * the information for an entry, go ahead and try to
         * add it to the policy vector.
         *
         */

        lookahead = st.nextToken();
        GrantEntry ge = null;
        while (lookahead != StreamTokenizer.TT_EOF) {
            if (peek("grant")) {
                ge = parseGrantEntry();
                // could be null if we couldn't expand a property
                if (ge != null)
                    add(ge);
            } else if (peek("keystore") && keyStoreUrlString==null) {
                // only one keystore entry per policy file, others will be
                // ignored
                parseKeyStoreEntry();
            } else if (peek("keystorePasswordURL") && storePassURL==null) {
                // only one keystore passwordURL per policy file, others will be
                // ignored
                parseStorePassURL();
            } else if (ge == null && keyStoreUrlString == null &&
                storePassURL == null && peek("domain")) {
                if (domainEntries == null) {
                    domainEntries = new TreeMap<>();
                }
                DomainEntry de = parseDomainEntry();
                if (de != null) {
                    String domainName = de.getName();
                    if (!domainEntries.containsKey(domainName)) {
                        domainEntries.put(domainName, de);
                    } else {
                        LocalizedMessage localizedMsg = new LocalizedMessage(
                            "duplicate.keystore.domain.name");
                        Object[] source = {domainName};
                        String msg = "duplicate keystore domain name: " +
                                     domainName;
                        throw new ParsingException(msg, localizedMsg, source);
                    }
                }
            } else {
                // error?
            }
            match(";");
        }

        if (keyStoreUrlString == null && storePassURL != null) {
            throw new ParsingException(LocalizedMessage.getNonlocalized
                ("keystorePasswordURL.can.not.be.specified.without.also.specifying.keystore"));
        }
    }

    public void add(GrantEntry ge)
    {
        grantEntries.addElement(ge);
    }

    public void replace(GrantEntry origGe, GrantEntry newGe)
    {
        grantEntries.setElementAt(newGe, grantEntries.indexOf(origGe));
    }

    public boolean remove(GrantEntry ge)
    {
        return grantEntries.removeElement(ge);
    }

    Returns the (possibly expanded) keystore location, or null if the
expansion fails.
/**
     * Returns the (possibly expanded) keystore location, or null if the
     * expansion fails.
     */
    public String getKeyStoreUrl() {
        try {
            if (keyStoreUrlString!=null && keyStoreUrlString.length()!=0) {
                return expand(keyStoreUrlString, true).replace
                                                (File.separatorChar, '/');
            }
        } catch (PropertyExpander.ExpandException peee) {
            if (debug != null) {
                debug.println(peee.toString());
            }
            return null;
        }
        return null;
    }

    public void setKeyStoreUrl(String url) {
        keyStoreUrlString = url;
    }

    public String getKeyStoreType() {
        return keyStoreType;
    }

    public void setKeyStoreType(String type) {
        keyStoreType = type;
    }

    public String getKeyStoreProvider() {
        return keyStoreProvider;
    }

    public void setKeyStoreProvider(String provider) {
        keyStoreProvider = provider;
    }

    public String getStorePassURL() {
        try {
            if (storePassURL!=null && storePassURL.length()!=0) {
                return expand(storePassURL, true).replace
                                                (File.separatorChar, '/');
            }
        } catch (PropertyExpander.ExpandException peee) {
            if (debug != null) {
                debug.println(peee.toString());
            }
            return null;
        }
        return null;
    }

    public void setStorePassURL(String storePassURL) {
        this.storePassURL = storePassURL;
    }

    Enumerate all the entries in the global policy object.
This method is used by policy admin tools.   The tools
should use the Enumeration methods on the returned object
to fetch the elements sequentially.
/**
     * Enumerate all the entries in the global policy object.
     * This method is used by policy admin tools.   The tools
     * should use the Enumeration methods on the returned object
     * to fetch the elements sequentially.
     */
    public Enumeration<GrantEntry> grantElements(){
        return grantEntries.elements();
    }

    public Collection<DomainEntry> getDomainEntries() {
        return domainEntries.values();
    }

    write out the policy
/**
     * write out the policy
     */

    public void write(Writer policy)
    {
        PrintWriter out = new PrintWriter(new BufferedWriter(policy));

        Enumeration<GrantEntry> enum_ = grantElements();

        out.println("/* AUTOMATICALLY GENERATED ON "+
                    (new java.util.Date()) + "*/");
        out.println("/* DO NOT EDIT */");
        out.println();

        // write the (unexpanded) keystore entry as the first entry of the
        // policy file
        if (keyStoreUrlString != null) {
            writeKeyStoreEntry(out);
        }
        if (storePassURL != null) {
            writeStorePassURL(out);
        }

        // write "grant" entries
        while (enum_.hasMoreElements()) {
            GrantEntry ge = enum_.nextElement();
            ge.write(out);
            out.println();
        }
        out.flush();
    }

    parses a keystore entry
/**
     * parses a keystore entry
     */
    private void parseKeyStoreEntry() throws ParsingException, IOException {
        match("keystore");
        keyStoreUrlString = match("quoted string");

        // parse keystore type
        if (!peek(",")) {
            return; // default type
        }
        match(",");

        if (peek("\"")) {
            keyStoreType = match("quoted string");
        } else {
            throw new ParsingException(st.lineno(),
                LocalizedMessage.getNonlocalized("expected.keystore.type"));
        }

        // parse keystore provider
        if (!peek(",")) {
            return; // provider optional
        }
        match(",");

        if (peek("\"")) {
            keyStoreProvider = match("quoted string");
        } else {
            throw new ParsingException(st.lineno(),
                LocalizedMessage.getNonlocalized("expected.keystore.provider"));
        }
    }

    private void parseStorePassURL() throws ParsingException, IOException {
        match("keyStorePasswordURL");
        storePassURL = match("quoted string");
    }

    writes the (unexpanded) keystore entry
/**
     * writes the (unexpanded) keystore entry
     */
    private void writeKeyStoreEntry(PrintWriter out) {
        out.print("keystore \"");
        out.print(keyStoreUrlString);
        out.print('"');
        if (keyStoreType != null && !keyStoreType.isEmpty())
            out.print(", \"" + keyStoreType + "\"");
        if (keyStoreProvider != null && !keyStoreProvider.isEmpty())
            out.print(", \"" + keyStoreProvider + "\"");
        out.println(";");
        out.println();
    }

    private void writeStorePassURL(PrintWriter out) {
        out.print("keystorePasswordURL \"");
        out.print(storePassURL);
        out.print('"');
        out.println(";");
        out.println();
    }

    parse a Grant entry
/**
     * parse a Grant entry
     */
    private GrantEntry parseGrantEntry()
        throws ParsingException, IOException
    {
        GrantEntry e = new GrantEntry();
        LinkedList<PrincipalEntry> principals = null;
        boolean ignoreEntry = false;

        match("grant");

        while(!peek("{")) {

            if (peekAndMatch("Codebase")) {
                if (e.codeBase != null)
                    throw new ParsingException(
                            st.lineno(),
                            LocalizedMessage.getNonlocalized
                                ("multiple.Codebase.expressions"));
                e.codeBase = match("quoted string");
                peekAndMatch(",");
            } else if (peekAndMatch("SignedBy")) {
                if (e.signedBy != null)
                    throw new ParsingException(
                            st.lineno(),
                            LocalizedMessage.getNonlocalized
                                ("multiple.SignedBy.expressions"));
                e.signedBy = match("quoted string");

                // verify syntax of the aliases
                StringTokenizer aliases = new StringTokenizer(e.signedBy,
                                                              ",", true);
                int actr = 0;
                int cctr = 0;
                while (aliases.hasMoreTokens()) {
                    String alias = aliases.nextToken().trim();
                    if (alias.equals(","))
                        cctr++;
                    else if (!alias.isEmpty())
                        actr++;
                }
                if (actr <= cctr)
                    throw new ParsingException(
                            st.lineno(),
                            LocalizedMessage.getNonlocalized
                                ("SignedBy.has.empty.alias"));

                peekAndMatch(",");
            } else if (peekAndMatch("Principal")) {
                if (principals == null) {
                    principals = new LinkedList<>();
                }

                String principalClass;
                String principalName;

                if (peek("\"")) {
                    // both the principalClass and principalName
                    // will be replaced later
                    principalClass = PrincipalEntry.REPLACE_NAME;
                    principalName = match("principal type");
                } else {
                    // check for principalClass wildcard
                    if (peek("*")) {
                        match("*");
                        principalClass = PrincipalEntry.WILDCARD_CLASS;
                    } else {
                        principalClass = match("principal type");
                    }

                    // check for principalName wildcard
                    if (peek("*")) {
                        match("*");
                        principalName = PrincipalEntry.WILDCARD_NAME;
                    } else {
                        principalName = match("quoted string");
                    }

                    // disallow WILDCARD_CLASS && actual name
                    if (principalClass.equals(PrincipalEntry.WILDCARD_CLASS) &&
                        !principalName.equals(PrincipalEntry.WILDCARD_NAME)) {
                        if (debug != null) {
                                debug.println("disallowing principal that " +
                                    "has WILDCARD class but no WILDCARD name");
                        }
                        throw new ParsingException
                                (st.lineno(),
                                LocalizedMessage.getNonlocalized
                                    ("can.not.specify.Principal.with.a.wildcard.class.without.a.wildcard.name"));
                    }
                }

                try {
                    principalName = expand(principalName);

                    if (principalClass.equals
                                ("javax.security.auth.x500.X500Principal") &&
                        !principalName.equals(PrincipalEntry.WILDCARD_NAME)) {

                        // 4702543:  X500 names with an EmailAddress
                        // were encoded incorrectly.  construct a new
                        // X500Principal with correct encoding.

                        X500Principal p = new X500Principal
                                ((new X500Principal(principalName)).toString());
                        principalName = p.getName();
                    }

                    principals.add
                        (new PrincipalEntry(principalClass, principalName));
                } catch (PropertyExpander.ExpandException peee) {
                    // ignore the entire policy entry
                    // but continue parsing all the info
                    // so we can get to the next entry
                    if (debug != null) {
                        debug.println("principal name expansion failed: " +
                                        principalName);
                    }
                    ignoreEntry = true;
                }
                peekAndMatch(",");

            } else {
                throw new ParsingException(st.lineno(),
                    LocalizedMessage.getNonlocalized
                        ("expected.codeBase.or.SignedBy.or.Principal"));
            }
        }

        if (principals != null) e.principals = principals;
        match("{");

        while(!peek("}")) {
            if (peek("Permission")) {
                try {
                    PermissionEntry pe = parsePermissionEntry();
                    e.add(pe);
                } catch (PropertyExpander.ExpandException peee) {
                    // ignore. The add never happened
                    if (debug != null) {
                        debug.println(peee.toString());
                    }
                    skipEntry();  // BugId 4219343
                }
                match(";");
            } else {
                throw new
                    ParsingException(st.lineno(),
                        LocalizedMessage.getNonlocalized
                            ("expected.permission.entry"));
            }
        }
        match("}");

        try {
            if (e.signedBy != null) e.signedBy = expand(e.signedBy);
            if (e.codeBase != null) {
                e.codeBase = expand(e.codeBase, true).replace
                                    (File.separatorChar, '/');
            }
        } catch (PropertyExpander.ExpandException peee) {
            if (debug != null) {
                debug.println(peee.toString());
            }
            return null;
        }

        return (ignoreEntry == true) ? null : e;
    }

    parse a Permission entry
/**
     * parse a Permission entry
     */
    private PermissionEntry parsePermissionEntry()
        throws ParsingException, IOException, PropertyExpander.ExpandException
    {
        PermissionEntry e = new PermissionEntry();

        // Permission
        match("Permission");
        e.permission = match("permission type");

        if (peek("\"")) {
            // Permission name
            e.name = expand(match("quoted string"));
        }

        if (!peek(",")) {
            return e;
        }
        match(",");

        if (peek("\"")) {
                e.action = expand(match("quoted string"));
                if (!peek(",")) {
                    return e;
                }
                match(",");
        }

        if (peekAndMatch("SignedBy")) {
            e.signedBy = expand(match("quoted string"));
        }
        return e;
    }

    parse a domain entry
/**
     * parse a domain entry
     */
    private DomainEntry parseDomainEntry()
        throws ParsingException, IOException
    {
        boolean ignoreEntry = false;
        DomainEntry domainEntry;
        String name = null;
        Map<String, String> properties = new HashMap<>();

        match("domain");
        name = match("domain name");

        while(!peek("{")) {
            // get the domain properties
            properties = parseProperties("{");
        }
        match("{");
        domainEntry = new DomainEntry(name, properties);

        while(!peek("}")) {

            match("keystore");
            name = match("keystore name");
            // get the keystore properties
            if (!peek("}")) {
                properties = parseProperties(";");
            }
            match(";");
            domainEntry.add(new KeyStoreEntry(name, properties));
        }
        match("}");

        return (ignoreEntry == true) ? null : domainEntry;
    }

    /*
     * Return a collection of domain properties or keystore properties.
     */
    private Map<String, String> parseProperties(String terminator)
        throws ParsingException, IOException {

        Map<String, String> properties = new HashMap<>();
        String key;
        String value;
        while (!peek(terminator)) {
            key = match("property name");
            match("=");

            try {
                value = expand(match("quoted string"));
            } catch (PropertyExpander.ExpandException peee) {
                throw new IOException(peee.getLocalizedMessage());
            }
            properties.put(key.toLowerCase(Locale.ENGLISH), value);
        }

        return properties;
    }

    private boolean peekAndMatch(String expect)
        throws ParsingException, IOException
    {
        if (peek(expect)) {
            match(expect);
            return true;
        } else {
            return false;
        }
    }

    private boolean peek(String expect) {
        boolean found = false;

        switch (lookahead) {

        case StreamTokenizer.TT_WORD:
            if (expect.equalsIgnoreCase(st.sval))
                found = true;
            break;
        case ',':
            if (expect.equalsIgnoreCase(","))
                found = true;
            break;
        case '{':
            if (expect.equalsIgnoreCase("{"))
                found = true;
            break;
        case '}':
            if (expect.equalsIgnoreCase("}"))
                found = true;
            break;
        case '"':
            if (expect.equalsIgnoreCase("\""))
                found = true;
            break;
        case '*':
            if (expect.equalsIgnoreCase("*"))
                found = true;
            break;
        case ';':
            if (expect.equalsIgnoreCase(";"))
                found = true;
            break;
        default:

        }
        return found;
    }

    private String match(String expect)
        throws ParsingException, IOException
    {
        String value = null;

        switch (lookahead) {
        case StreamTokenizer.TT_NUMBER:
            throw new ParsingException(st.lineno(), expect,
                LocalizedMessage.getNonlocalized("number.") +
                    String.valueOf(st.nval));
        case StreamTokenizer.TT_EOF:
            LocalizedMessage localizedMsg = new LocalizedMessage
                ("expected.expect.read.end.of.file.");
            Object[] source = {expect};
            String msg = "expected [" + expect + "], read [end of file]";
            throw new ParsingException(msg, localizedMsg, source);
        case StreamTokenizer.TT_WORD:
            if (expect.equalsIgnoreCase(st.sval)) {
                lookahead = st.nextToken();
            } else if (expect.equalsIgnoreCase("permission type")) {
                value = st.sval;
                lookahead = st.nextToken();
            } else if (expect.equalsIgnoreCase("principal type")) {
                value = st.sval;
                lookahead = st.nextToken();
            } else if (expect.equalsIgnoreCase("domain name") ||
                       expect.equalsIgnoreCase("keystore name") ||
                       expect.equalsIgnoreCase("property name")) {
                value = st.sval;
                lookahead = st.nextToken();
            } else {
                 throw new ParsingException(st.lineno(), expect,
                                            st.sval);
            }
            break;
        case '"':
            if (expect.equalsIgnoreCase("quoted string")) {
                value = st.sval;
                lookahead = st.nextToken();
            } else if (expect.equalsIgnoreCase("permission type")) {
                value = st.sval;
                lookahead = st.nextToken();
            } else if (expect.equalsIgnoreCase("principal type")) {
                value = st.sval;
                lookahead = st.nextToken();
            } else {
                throw new ParsingException(st.lineno(), expect, st.sval);
            }
            break;
        case ',':
            if (expect.equalsIgnoreCase(","))
                lookahead = st.nextToken();
            else
                throw new ParsingException(st.lineno(), expect, ",");
            break;
        case '{':
            if (expect.equalsIgnoreCase("{"))
                lookahead = st.nextToken();
            else
                throw new ParsingException(st.lineno(), expect, "{");
            break;
        case '}':
            if (expect.equalsIgnoreCase("}"))
                lookahead = st.nextToken();
            else
                throw new ParsingException(st.lineno(), expect, "}");
            break;
        case ';':
            if (expect.equalsIgnoreCase(";"))
                lookahead = st.nextToken();
            else
                throw new ParsingException(st.lineno(), expect, ";");
            break;
        case '*':
            if (expect.equalsIgnoreCase("*"))
                lookahead = st.nextToken();
            else
                throw new ParsingException(st.lineno(), expect, "*");
            break;
        case '=':
            if (expect.equalsIgnoreCase("="))
                lookahead = st.nextToken();
            else
                throw new ParsingException(st.lineno(), expect, "=");
            break;
        default:
            throw new ParsingException(st.lineno(), expect,
                               new String(new char[] {(char)lookahead}));
        }
        return value;
    }

    skip all tokens for this entry leaving the delimiter ";"
in the stream.
/**
     * skip all tokens for this entry leaving the delimiter ";"
     * in the stream.
     */
    private void skipEntry() throws ParsingException, IOException {
        while(lookahead != ';') {
            switch (lookahead) {
            case StreamTokenizer.TT_NUMBER:
                throw new ParsingException(st.lineno(), ";",
                        LocalizedMessage.getNonlocalized("number.") +
                            String.valueOf(st.nval));
            case StreamTokenizer.TT_EOF:
                throw new ParsingException(LocalizedMessage.getNonlocalized
                        ("expected.read.end.of.file."));
            default:
                lookahead = st.nextToken();
            }
        }
    }

    Each grant entry in the policy configuration file is
represented by a GrantEntry object.

For example, the entry
     grant signedBy "Duke" {
         permission java.io.FilePermission "/tmp", "read,write";
     };

is represented internally
pe = new PermissionEntry("java.io.FilePermission",
                          "/tmp", "read,write");
ge = new GrantEntry("Duke", null);
ge.add(pe);

Author: Roland Schemers
version 1.19, 05/21/98/**
     * Each grant entry in the policy configuration file is
     * represented by a GrantEntry object.
     *
     * <p>
     * For example, the entry
     * <pre>
     *      grant signedBy "Duke" {
     *          permission java.io.FilePermission "/tmp", "read,write";
     *      };
     *
     * </pre>
     * is represented internally
     * <pre>
     *
     * pe = new PermissionEntry("java.io.FilePermission",
     *                           "/tmp", "read,write");
     *
     * ge = new GrantEntry("Duke", null);
     *
     * ge.add(pe);
     *
     * </pre>
     *
     * @author Roland Schemers
     *
     * version 1.19, 05/21/98
     */

    public static class GrantEntry {

        public String signedBy;
        public String codeBase;
        public LinkedList<PrincipalEntry> principals;
        public Vector<PermissionEntry> permissionEntries;

        public GrantEntry() {
            principals = new LinkedList<PrincipalEntry>();
            permissionEntries = new Vector<PermissionEntry>();
        }

        public GrantEntry(String signedBy, String codeBase) {
            this.codeBase = codeBase;
            this.signedBy = signedBy;
            principals = new LinkedList<PrincipalEntry>();
            permissionEntries = new Vector<PermissionEntry>();
        }

        public void add(PermissionEntry pe)
        {
            permissionEntries.addElement(pe);
        }

        public boolean remove(PrincipalEntry pe)
        {
            return principals.remove(pe);
        }

        public boolean remove(PermissionEntry pe)
        {
            return permissionEntries.removeElement(pe);
        }

        public boolean contains(PrincipalEntry pe)
        {
            return principals.contains(pe);
        }

        public boolean contains(PermissionEntry pe)
        {
            return permissionEntries.contains(pe);
        }

        Enumerate all the permission entries in this GrantEntry.
/**
         * Enumerate all the permission entries in this GrantEntry.
         */
        public Enumeration<PermissionEntry> permissionElements(){
            return permissionEntries.elements();
        }


        public void write(PrintWriter out) {
            out.print("grant");
            if (signedBy != null) {
                out.print(" signedBy \"");
                out.print(signedBy);
                out.print('"');
                if (codeBase != null)
                    out.print(", ");
            }
            if (codeBase != null) {
                out.print(" codeBase \"");
                out.print(codeBase);
                out.print('"');
                if (principals != null && principals.size() > 0)
                    out.print(",\n");
            }
            if (principals != null && principals.size() > 0) {
                Iterator<PrincipalEntry> pli = principals.iterator();
                while (pli.hasNext()) {
                    out.print("      ");
                    PrincipalEntry pe = pli.next();
                    pe.write(out);
                    if (pli.hasNext())
                        out.print(",\n");
                }
            }
            out.println(" {");
            Enumeration<PermissionEntry> enum_ = permissionEntries.elements();
            while (enum_.hasMoreElements()) {
                PermissionEntry pe = enum_.nextElement();
                out.write("  ");
                pe.write(out);
            }
            out.println("};");
        }

        public Object clone() {
            GrantEntry ge = new GrantEntry();
            ge.codeBase = this.codeBase;
            ge.signedBy = this.signedBy;
            ge.principals = new LinkedList<PrincipalEntry>(this.principals);
            ge.permissionEntries =
                        new Vector<PermissionEntry>(this.permissionEntries);
            return ge;
        }
    }

    Principal info (class and name) in a grant entry
/**
     * Principal info (class and name) in a grant entry
     */
    public static class PrincipalEntry implements Principal {

        public static final String WILDCARD_CLASS = "WILDCARD_PRINCIPAL_CLASS";
        public static final String WILDCARD_NAME = "WILDCARD_PRINCIPAL_NAME";
        public static final String REPLACE_NAME = "PolicyParser.REPLACE_NAME";

        String principalClass;
        String principalName;

        A PrincipalEntry consists of the Principal class and Principal name.
Params: principalClass – the Principal class
principalName – the Principal name
Throws: NullPointerException – if principalClass or principalName
                             are null/**
         * A PrincipalEntry consists of the Principal class and Principal name.
         *
         * @param principalClass the Principal class
         * @param principalName the Principal name
         * @throws NullPointerException if principalClass or principalName
         *                              are null
         */
        public PrincipalEntry(String principalClass, String principalName) {
            if (principalClass == null || principalName == null)
                throw new NullPointerException(LocalizedMessage.getNonlocalized
                    ("null.principalClass.or.principalName"));
            this.principalClass = principalClass;
            this.principalName = principalName;
        }

        boolean isWildcardName() {
            return principalName.equals(WILDCARD_NAME);
        }

        boolean isWildcardClass() {
            return principalClass.equals(WILDCARD_CLASS);
        }

        boolean isReplaceName() {
            return principalClass.equals(REPLACE_NAME);
        }

        public String getPrincipalClass() {
            return principalClass;
        }

        public String getPrincipalName() {
            return principalName;
        }

        public String getDisplayClass() {
            if (isWildcardClass()) {
                return "*";
            } else if (isReplaceName()) {
                return "";
            }
            else return principalClass;
        }

        public String getDisplayName() {
            return getDisplayName(false);
        }

        public String getDisplayName(boolean addQuote) {
            if (isWildcardName()) {
                return "*";
            }
            else {
                if (addQuote) return "\"" + principalName + "\"";
                else return principalName;
            }
        }

        @Override
        public String getName() {
            return principalName;
        }

        @Override
        public String toString() {
            if (!isReplaceName()) {
                return getDisplayClass() + "/" + getDisplayName();
            } else {
                return getDisplayName();
            }
        }

        Test for equality between the specified object and this object.
Two PrincipalEntries are equal if their class and name values
are equal.
Params: obj – the object to test for equality with this object
Returns: true if the objects are equal, false otherwise/**
         * Test for equality between the specified object and this object.
         * Two PrincipalEntries are equal if their class and name values
         * are equal.
         *
         * @param obj the object to test for equality with this object
         * @return true if the objects are equal, false otherwise
         */
        @Override
        public boolean equals(Object obj) {
            if (this == obj)
                return true;

            if (!(obj instanceof PrincipalEntry))
                return false;

            PrincipalEntry that = (PrincipalEntry)obj;
            return (principalClass.equals(that.principalClass) &&
                    principalName.equals(that.principalName));
        }

        Return a hashcode for this PrincipalEntry.
Returns: a hashcode for this PrincipalEntry/**
         * Return a hashcode for this PrincipalEntry.
         *
         * @return a hashcode for this PrincipalEntry
         */
        @Override
        public int hashCode() {
            return principalClass.hashCode();
        }

        public void write(PrintWriter out) {
            out.print("principal " + getDisplayClass() + " " +
                      getDisplayName(true));
        }
    }

    Each permission entry in the policy configuration file is
represented by a
PermissionEntry object.

For example, the entry
         permission java.io.FilePermission "/tmp", "read,write";

is represented internally
pe = new PermissionEntry("java.io.FilePermission",
                          "/tmp", "read,write");

Author: Roland Schemers
version 1.19, 05/21/98/**
     * Each permission entry in the policy configuration file is
     * represented by a
     * PermissionEntry object.
     *
     * <p>
     * For example, the entry
     * <pre>
     *          permission java.io.FilePermission "/tmp", "read,write";
     * </pre>
     * is represented internally
     * <pre>
     *
     * pe = new PermissionEntry("java.io.FilePermission",
     *                           "/tmp", "read,write");
     * </pre>
     *
     * @author Roland Schemers
     *
     * version 1.19, 05/21/98
     */

    public static class PermissionEntry {

        public String permission;
        public String name;
        public String action;
        public String signedBy;

        public PermissionEntry() {
        }

        public PermissionEntry(String permission,
                        String name,
                        String action) {
            this.permission = permission;
            this.name = name;
            this.action = action;
        }

        Calculates a hash code value for the object.  Objects
which are equal will also have the same hashcode.
/**
         * Calculates a hash code value for the object.  Objects
         * which are equal will also have the same hashcode.
         */
        @Override
        public int hashCode() {
            int retval = permission.hashCode();
            if (name != null) retval ^= name.hashCode();
            if (action != null) retval ^= action.hashCode();
            return retval;
        }

        @Override
        public boolean equals(Object obj) {
            if (obj == this)
                return true;

            if (! (obj instanceof PermissionEntry))
                return false;

            PermissionEntry that = (PermissionEntry) obj;

            if (this.permission == null) {
                if (that.permission != null) return false;
            } else {
                if (!this.permission.equals(that.permission)) return false;
            }

            if (this.name == null) {
                if (that.name != null) return false;
            } else {
                if (!this.name.equals(that.name)) return false;
            }

            if (this.action == null) {
                if (that.action != null) return false;
            } else {
                if (!this.action.equals(that.action)) return false;
            }

            if (this.signedBy == null) {
                if (that.signedBy != null) return false;
            } else {
                if (!this.signedBy.equals(that.signedBy)) return false;
            }

            // everything matched -- the 2 objects are equal
            return true;
        }

        public void write(PrintWriter out) {
            out.print("permission ");
            out.print(permission);
            if (name != null) {
                out.print(" \"");

                // ATTENTION: regex with double escaping,
                // the normal forms look like:
                // $name =~ s/\\/\\\\/g; and
                // $name =~ s/\"/\\\"/g;
                // and then in a java string, it's escaped again

                out.print(name.replaceAll("\\\\", "\\\\\\\\").replaceAll("\\\"", "\\\\\\\""));
                out.print('"');
            }
            if (action != null) {
                out.print(", \"");
                out.print(action);
                out.print('"');
            }
            if (signedBy != null) {
                out.print(", signedBy \"");
                out.print(signedBy);
                out.print('"');
            }
            out.println(";");
        }
    }

    Each domain entry in the keystore domain configuration file is
represented by a DomainEntry object.
/**
     * Each domain entry in the keystore domain configuration file is
     * represented by a DomainEntry object.
     */
    static class DomainEntry {
        private final String name;
        private final Map<String, String> properties;
        private final Map<String, KeyStoreEntry> entries;

        DomainEntry(String name, Map<String, String> properties) {
            this.name = name;
            this.properties = properties;
            entries = new HashMap<>();
        }

        String getName() {
            return name;
        }

        Map<String, String> getProperties() {
            return properties;
        }

        Collection<KeyStoreEntry> getEntries() {
            return entries.values();
        }

        void add(KeyStoreEntry entry) throws ParsingException {
            String keystoreName = entry.getName();
            if (!entries.containsKey(keystoreName)) {
                entries.put(keystoreName, entry);
            } else {
                LocalizedMessage localizedMsg = new LocalizedMessage
                    ("duplicate.keystore.name");
                Object[] source = {keystoreName};
                String msg = "duplicate keystore name: " + keystoreName;
                throw new ParsingException(msg, localizedMsg, source);
            }
        }

        @Override
        public String toString() {
            StringBuilder s =
                new StringBuilder("\ndomain ").append(name);

            if (properties != null) {
                for (Map.Entry<String, String> property :
                    properties.entrySet()) {
                    s.append("\n        ").append(property.getKey()).append('=')
                        .append(property.getValue());
                }
            }
            s.append(" {\n");

            if (entries != null) {
                for (KeyStoreEntry entry : entries.values()) {
                    s.append(entry).append("\n");
                }
            }
            s.append("}");

            return s.toString();
        }
    }

    Each keystore entry in the keystore domain configuration file is
represented by a KeyStoreEntry object.
/**
     * Each keystore entry in the keystore domain configuration file is
     * represented by a KeyStoreEntry object.
     */

    static class KeyStoreEntry {
        private final String name;
        private final Map<String, String> properties;

        KeyStoreEntry(String name, Map<String, String> properties) {
            this.name = name;
            this.properties = properties;
        }

        String getName() {
            return name;
        }

        Map<String, String>  getProperties() {
            return properties;
        }

        @Override
        public String toString() {
            StringBuilder s = new StringBuilder("\n    keystore ").append(name);
            if (properties != null) {
                for (Map.Entry<String, String> property :
                    properties.entrySet()) {
                    s.append("\n        ").append(property.getKey()).append('=')
                        .append(property.getValue());
                }
            }
            s.append(";");

            return s.toString();
        }
    }

    public static class ParsingException extends GeneralSecurityException {

        private static final long serialVersionUID = -4330692689482574072L;

        private String i18nMessage;
        private LocalizedMessage localizedMsg;
        private Object[] source;

        Constructs a ParsingException with the specified
detail message. A detail message is a String that describes
this particular exception, which may, for example, specify which
algorithm is not available.
Params: msg – the detail message./**
         * Constructs a ParsingException with the specified
         * detail message. A detail message is a String that describes
         * this particular exception, which may, for example, specify which
         * algorithm is not available.
         *
         * @param msg the detail message.
         */
        public ParsingException(String msg) {
            super(msg);
            i18nMessage = msg;
        }

        public ParsingException(String msg, LocalizedMessage localizedMsg,
                                Object[] source) {
            super(msg);
            this.localizedMsg = localizedMsg;
            this.source = source;
        }

        public ParsingException(int line, String msg) {
            super("line " + line + ": " + msg);
            localizedMsg = new LocalizedMessage("line.number.msg");
            source = new Object[] {line, msg};
        }

        public ParsingException(int line, String expect, String actual) {
            super("line " + line + ": expected [" + expect +
                "], found [" + actual + "]");
            localizedMsg = new LocalizedMessage
                ("line.number.expected.expect.found.actual.");
            source = new Object[] {line, expect, actual};
        }

        public String getNonlocalizedMessage() {
            return i18nMessage != null ? i18nMessage :
                localizedMsg.formatNonlocalized(source);
        }
    }

    public static void main(String[] arg) throws Exception {
        try (FileReader fr = new FileReader(arg[0]);
             FileWriter fw = new FileWriter(arg[1])) {
            PolicyParser pp = new PolicyParser(true);
            pp.read(fr);
            pp.write(fw);
        }
    }
}
Params:	policy – the policy Reader object.
Throws:	ParsingException – if the policy configuration contains a syntax error. IOException – if an error occurs while reading the policy configuration.
Params:	principalClass – the Principal class principalName – the Principal name
Throws:	NullPointerException – if principalClass or principalName are null
Params:	obj – the object to test for equality with this object
Returns:	true if the objects are equal, false otherwise
/

java/ 11/ java.base/sun/security/provider/PolicyParser.java
