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org.apache.wss4j.common.util.AttachmentUtils Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.wss4j.common.util;
import org.apache.wss4j.common.ext.Attachment;
import org.apache.wss4j.common.ext.AttachmentRequestCallback;
import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.xml.security.algorithms.JCEMapper;
import org.apache.xml.security.encryption.XMLCipherUtil;
import org.apache.xml.security.stax.impl.util.MultiInputStream;
import org.apache.xml.security.utils.JavaUtils;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.mail.internet.MimeUtility;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import java.io.*;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.spec.AlgorithmParameterSpec;
import java.util.*;
public final class AttachmentUtils {
public static final String MIME_HEADER_CONTENT_DESCRIPTION = "Content-Description";
public static final String MIME_HEADER_CONTENT_DISPOSITION = "Content-Disposition";
public static final String MIME_HEADER_CONTENT_ID = "Content-ID";
public static final String MIME_HEADER_CONTENT_LOCATION = "Content-Location";
public static final String MIME_HEADER_CONTENT_TYPE = "Content-Type";
public static final char DOUBLE_QUOTE = '"';
public static final char SINGLE_QUOTE = '\'';
public static final char LEFT_PARENTHESIS = '(';
public static final char RIGHT_PARENTHESIS = ')';
public static final char CARRIAGE_RETURN = '\r';
public static final char LINEFEED = '\n';
public static final char SPACE = ' ';
public static final char HTAB = '\t';
public static final char EQUAL = '=';
public static final char ASTERISK = '*';
public static final char SEMICOLON = ';';
public static final char BACKSLASH = '\\';
public static final String PARAM_CHARSET = "charset";
public static final String PARAM_CREATION_DATE = "creation-date";
public static final String PARAM_FILENAME = "filename";
public static final String PARAM_MODIFICATION_DATE = "modification-date";
public static final String PARAM_PADDING = "padding";
public static final String PARAM_READ_DATE = "read-date";
public static final String PARAM_SIZE = "size";
public static final String PARAM_TYPE = "type";
public static final Set ALL_PARAMS = new HashSet<>();
static {
ALL_PARAMS.add(PARAM_CHARSET);
ALL_PARAMS.add(PARAM_CREATION_DATE);
ALL_PARAMS.add(PARAM_FILENAME);
ALL_PARAMS.add(PARAM_MODIFICATION_DATE);
ALL_PARAMS.add(PARAM_PADDING);
ALL_PARAMS.add(PARAM_READ_DATE);
ALL_PARAMS.add(PARAM_SIZE);
ALL_PARAMS.add(PARAM_TYPE);
}
private AttachmentUtils() {
// complete
}
public static void canonizeMimeHeaders(OutputStream os, Map headers) throws IOException {
//5.4.1 MIME header canonicalization:
//3. sorting
Map sortedHeaders = new TreeMap<>();
Iterator> iterator = headers.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry next = iterator.next();
String name = next.getKey();
String value = next.getValue();
//2. only listed headers; 4. case
if (MIME_HEADER_CONTENT_DESCRIPTION.equalsIgnoreCase(name)) {
sortedHeaders.put(MIME_HEADER_CONTENT_DESCRIPTION,
//9. uncomment
uncomment(
//6. decode
MimeUtility.decodeText(
//5. unfold
MimeUtility.unfold(value)
)
)
);
} else if (MIME_HEADER_CONTENT_DISPOSITION.equalsIgnoreCase(name)) {
sortedHeaders.put(MIME_HEADER_CONTENT_DISPOSITION,
decodeRfc2184(
//9. uncomment
uncomment(
//8. unfold ws
unfoldWhitespace(
//5. unfold
MimeUtility.unfold(value)
)
)
)
);
} else if (MIME_HEADER_CONTENT_ID.equalsIgnoreCase(name)) {
sortedHeaders.put(MIME_HEADER_CONTENT_ID,
//9. uncomment
uncomment(
//8. unfold ws
unfoldWhitespace(
//5. unfold
MimeUtility.unfold(value)
)
)
);
} else if (MIME_HEADER_CONTENT_LOCATION.equalsIgnoreCase(name)) {
sortedHeaders.put(MIME_HEADER_CONTENT_LOCATION,
//9. uncomment
uncomment(
//8. unfold ws
unfoldWhitespace(
//5. unfold
MimeUtility.unfold(value)
)
)
);
} else if (MIME_HEADER_CONTENT_TYPE.equalsIgnoreCase(name)) {
sortedHeaders.put(MIME_HEADER_CONTENT_TYPE,
decodeRfc2184(
//9. uncomment
uncomment(
//8. unfold ws
unfoldWhitespace(
//5. unfold
MimeUtility.unfold(value)
)
)
)
);
}
}
//2. default content-type
if (!sortedHeaders.containsKey(MIME_HEADER_CONTENT_TYPE)) {
sortedHeaders.put(MIME_HEADER_CONTENT_TYPE, "text/plain;charset=\"us-ascii\"");
}
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(os, StandardCharsets.UTF_8);
Iterator> entryIterator = sortedHeaders.entrySet().iterator();
while (entryIterator.hasNext()) {
Map.Entry next = entryIterator.next();
String name = next.getKey();
String value = next.getValue();
//12.
outputStreamWriter.write(name);
outputStreamWriter.write(':');
outputStreamWriter.write(value);
//18. CRLF pair
if (!value.endsWith("\r\n")) {
outputStreamWriter.write("\r\n");
}
}
outputStreamWriter.flush();
}
public static String unfoldWhitespace(String text) {
int count = 0;
char[] chars = text.toCharArray();
for (char character : chars) {
if (SPACE != character && HTAB != character) {
break;
}
count++;
}
return text.substring(count, chars.length);
}
//removes any CRLF followed by a whitespace
public static String unfold(final String text) {
int length = text.length();
if (length < 3) {
return text;
}
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < length - 2; i++) {
char ch1 = text.charAt(i);
final char ch2 = text.charAt(i + 1);
final char ch3 = text.charAt(i + 2);
if (CARRIAGE_RETURN == ch1 && LINEFEED == ch2 && (SPACE == ch3 || HTAB == ch3)) {
i += 2;
if (i >= length - 3) {
for (i++; i < length; i++) { //NOPMD
stringBuilder.append(text.charAt(i));
}
}
continue;
}
stringBuilder.append(ch1);
if (i == length - 3) {
stringBuilder.append(ch2);
stringBuilder.append(ch3);
}
}
return stringBuilder.toString();
}
public static String decodeRfc2184(String text) throws UnsupportedEncodingException {
if (!text.contains(";")) {
return text;
}
String[] params = text.split(";");
//first part is the Mime-Header-Value
StringBuilder stringBuilder = new StringBuilder();
//10. lower case
stringBuilder.append(params[0].toLowerCase());
TreeMap paramMap = new TreeMap<>();
String parameterName = null;
String parameterValue = null;
String charset = "us-ascii";
for (int i = 1; i < params.length; i++) {
String param = params[i];
int index = param.indexOf(EQUAL);
String pName = param.substring(0, index).trim().toLowerCase();
String pValue = param.substring(index + 1).trim();
int idx = pName.lastIndexOf(ASTERISK);
if (idx == pName.length() - 1) {
//language encoded
pName = pName.substring(0, pName.length() - 1);
int charsetIdx = pValue.indexOf(SINGLE_QUOTE);
if (charsetIdx >= 0) {
charset = pValue.substring(0, charsetIdx);
}
pValue = pValue.substring(pValue.lastIndexOf(SINGLE_QUOTE) + 1);
pValue = URLDecoder.decode(pValue, MimeUtility.javaCharset(charset));
}
idx = pName.lastIndexOf(ASTERISK);
if (idx >= 0) {
//continuation
//int curr = Integer.parseInt(pName.substring(idx+1).trim());
String pn = pName.substring(0, idx).trim();
if (pn.equals(parameterName)) {
parameterValue = concatParamValues(parameterValue, pValue);
} else if (parameterName == null) {
parameterName = pn;
parameterValue = pValue;
} else {
if (ALL_PARAMS.contains(parameterName)) {
parameterValue = parameterValue.toLowerCase();
}
paramMap.put(parameterName,
unquoteInnerText(
quote(parameterValue)
)
);
}
} else {
if (parameterName != null) {
if (ALL_PARAMS.contains(parameterName)) {
parameterValue = parameterValue.toLowerCase();
}
paramMap.put(parameterName,
unquoteInnerText(
quote(parameterValue)
)
);
parameterName = null;
parameterValue = null;
}
if (ALL_PARAMS.contains(pName)) {
pValue = pValue.toLowerCase();
}
paramMap.put(pName,
unquoteInnerText(
quote(pValue)
)
);
}
}
if (parameterName != null) {
if (ALL_PARAMS.contains(parameterName)) {
parameterValue = parameterValue.toLowerCase();
}
paramMap.put(parameterName,
unquoteInnerText(
quote(parameterValue)
)
);
}
Iterator> iterator = paramMap.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry next = iterator.next();
stringBuilder.append(SEMICOLON);
stringBuilder.append(next.getKey());
stringBuilder.append(EQUAL);
stringBuilder.append(next.getValue());
}
return stringBuilder.toString();
}
public static String concatParamValues(String a, String b) {
if (DOUBLE_QUOTE == a.charAt(a.length() - 1)) {
a = a.substring(0, a.length() - 1);
}
if (DOUBLE_QUOTE == b.charAt(0)) {
b = b.substring(1);
}
return a + b;
}
public static String quote(String text) {
char startChar = text.charAt(0);
char endChar = text.charAt(text.length() - 1);
if (DOUBLE_QUOTE == startChar && DOUBLE_QUOTE == endChar) {
return text;
} else if (DOUBLE_QUOTE != startChar && DOUBLE_QUOTE != endChar) {
return DOUBLE_QUOTE + text + DOUBLE_QUOTE;
} else if (DOUBLE_QUOTE != startChar) {
return DOUBLE_QUOTE + text;
} else {
return text + DOUBLE_QUOTE;
}
}
public static String unquoteInnerText(final String text) {
StringBuilder stringBuilder = new StringBuilder();
int length = text.length();
for (int i = 0; i < length - 1; i++) {
char c = text.charAt(i);
char c1 = text.charAt(i + 1);
if (i == 0 && DOUBLE_QUOTE == c) {
stringBuilder.append(c);
continue;
}
if (BACKSLASH == c && (DOUBLE_QUOTE == c1 || BACKSLASH == c1)) {
if (i != 0 && i != length - 2) {
stringBuilder.append(c);
}
stringBuilder.append(c1);
i++;
} else if (DOUBLE_QUOTE == c) {
stringBuilder.append(BACKSLASH);
stringBuilder.append(c);
} else if (BACKSLASH == c) {
stringBuilder.append(c1);
i++;
} else {
stringBuilder.append(c);
if (i == length - 2 && DOUBLE_QUOTE == c1) {
stringBuilder.append(c1);
}
}
}
return stringBuilder.toString();
}
/*
* Removes any comment outside quoted text. Comments are enclosed between ()
*/
public static String uncomment(final String text) {
StringBuilder stringBuilder = new StringBuilder();
int inComment = 0;
int length = text.length();
outer:
for (int i = 0; i < length; i++) {
char ch = text.charAt(i);
if (DOUBLE_QUOTE == ch) {
stringBuilder.append(ch);
for (i++; i < length; i++) { //NOPMD
ch = text.charAt(i);
stringBuilder.append(ch);
if (DOUBLE_QUOTE == ch) {
continue outer;
}
}
}
if (LEFT_PARENTHESIS == ch) {
inComment++;
for (i++; i < length; i++) { //NOPMD
ch = text.charAt(i);
if (LEFT_PARENTHESIS == ch) {
inComment++;
}
if (RIGHT_PARENTHESIS == ch) {
inComment--;
if (inComment == 0) {
continue outer;
}
}
}
}
stringBuilder.append(ch);
}
return stringBuilder.toString();
}
public static void readAndReplaceEncryptedAttachmentHeaders(
Map headers, InputStream attachmentInputStream) throws IOException, WSSecurityException {
//read and replace headers
List headerLines = new ArrayList<>();
StringBuilder stringBuilder = new StringBuilder();
boolean cr = false;
int ch;
int lineLength = 0;
while ((ch = attachmentInputStream.read()) != -1) {
if (ch == '\r') {
cr = true;
} else if (ch == '\n' && cr) {
cr = false;
if (lineLength == 1 && stringBuilder.charAt(0) == '\r') {
break;
}
if (headerLines.size() > 100) {
//so much headers? go away....
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILED_CHECK);
}
headerLines.add(stringBuilder.substring(0, stringBuilder.length() - 1));
lineLength = 0;
stringBuilder.delete(0, stringBuilder.length());
continue;
}
lineLength++;
//Lines in a message MUST be a maximum of 998 characters excluding the CRLF
if (lineLength >= 1000) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILED_CHECK);
}
stringBuilder.append((char) ch);
}
for (int i = 0; i < headerLines.size(); i++) {
String s = headerLines.get(i);
int idx = s.indexOf(':');
if (idx == -1) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILED_CHECK);
}
headers.put(s.substring(0, idx), s.substring(idx + 1));
}
}
public static InputStream setupAttachmentDecryptionStream(
final String encAlgo, final Cipher cipher, final Key key, InputStream inputStream)
throws WSSecurityException {
CipherInputStream cipherInputStream = new CipherInputStream(inputStream, cipher) {
private boolean firstRead = true;
private void initCipher() throws IOException {
int ivLen = JCEMapper.getIVLengthFromURI(encAlgo) / 8;
byte[] ivBytes = new byte[ivLen];
int read = super.in.read(ivBytes, 0, ivLen);
while (read != ivLen) {
read += super.in.read(ivBytes, read, ivLen - read);
}
AlgorithmParameterSpec paramSpec =
XMLCipherUtil.constructBlockCipherParameters(encAlgo, ivBytes, AttachmentUtils.class);
try {
cipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
} catch (InvalidKeyException | InvalidAlgorithmParameterException e) {
throw new IOException(e);
}
}
@Override
public int read() throws IOException {
if (firstRead) {
initCipher();
firstRead = false;
}
return super.read();
}
@Override
public int read(byte[] bytes) throws IOException {
if (firstRead) {
initCipher();
firstRead = false;
}
return super.read(bytes);
}
@Override
public int read(byte[] bytes, int i, int i2) throws IOException {
if (firstRead) {
initCipher();
firstRead = false;
}
return super.read(bytes, i, i2);
}
@Override
public long skip(long l) throws IOException {
if (firstRead) {
initCipher();
firstRead = false;
}
return super.skip(l);
}
@Override
public int available() throws IOException {
if (firstRead) {
initCipher();
firstRead = false;
}
return super.available();
}
};
return cipherInputStream;
}
public static InputStream setupAttachmentEncryptionStream(
Cipher cipher, boolean complete, Attachment attachment,
Map headers) throws WSSecurityException {
final InputStream attachmentInputStream;
if (complete) {
try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream()) {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(byteArrayOutputStream, StandardCharsets.US_ASCII);
Iterator> iterator = headers.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry next = iterator.next();
String key = next.getKey();
String value = next.getValue();
//5.5.2 Encryption Processing Rules
//When encryption includes MIME headers, only the headers listed in this specification
//for the Attachment-Complete-Signature-Transform (Section 5.3.2) are to be included in
//the encryption. If a header listed in the profile is present it MUST be included in
//the encryption. If a header is not listed in this profile, then it MUST NOT be
//included in the encryption.
if (AttachmentUtils.MIME_HEADER_CONTENT_DESCRIPTION.equals(key)
|| AttachmentUtils.MIME_HEADER_CONTENT_DISPOSITION.equals(key)
|| AttachmentUtils.MIME_HEADER_CONTENT_ID.equals(key)
|| AttachmentUtils.MIME_HEADER_CONTENT_LOCATION.equals(key)
|| AttachmentUtils.MIME_HEADER_CONTENT_TYPE.equals(key)) {
iterator.remove();
outputStreamWriter.write(key);
outputStreamWriter.write(':');
outputStreamWriter.write(value);
outputStreamWriter.write("\r\n");
}
}
outputStreamWriter.write("\r\n");
outputStreamWriter.close();
attachmentInputStream = new MultiInputStream(
new ByteArrayInputStream(byteArrayOutputStream.toByteArray()),
attachment.getSourceStream()
);
} catch (IOException e) {
throw new WSSecurityException(WSSecurityException.ErrorCode.FAILED_ENCRYPTION, e);
}
} else {
attachmentInputStream = attachment.getSourceStream();
}
final ByteArrayInputStream ivInputStream = new ByteArrayInputStream(cipher.getIV());
final CipherInputStream cipherInputStream = new CipherInputStream(attachmentInputStream, cipher);
return new MultiInputStream(ivInputStream, cipherInputStream);
}
public static byte[] getBytesFromAttachment(
String xopUri, CallbackHandler attachmentCallbackHandler, boolean removeAttachments
) throws WSSecurityException {
if (attachmentCallbackHandler == null) {
throw new WSSecurityException(WSSecurityException.ErrorCode.FAILED_CHECK);
}
String attachmentId = getAttachmentId(xopUri);
AttachmentRequestCallback attachmentRequestCallback = new AttachmentRequestCallback();
attachmentRequestCallback.setAttachmentId(attachmentId);
attachmentRequestCallback.setRemoveAttachments(removeAttachments);
try {
attachmentCallbackHandler.handle(new Callback[]{attachmentRequestCallback});
List attachments = attachmentRequestCallback.getAttachments();
if (attachments == null || attachments.isEmpty()
|| !attachmentId.equals(attachments.get(0).getId())) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.INVALID_SECURITY,
"empty", new Object[] {"Attachment not found: " + xopUri}
);
}
Attachment attachment = attachments.get(0);
InputStream inputStream = attachment.getSourceStream();
return JavaUtils.getBytesFromStream(inputStream);
} catch (UnsupportedCallbackException | IOException e) {
throw new WSSecurityException(WSSecurityException.ErrorCode.FAILED_CHECK, e);
}
}
public static String getAttachmentId(String xopUri) throws WSSecurityException {
try {
return URLDecoder.decode(xopUri.substring("cid:".length()), StandardCharsets.UTF_8.name());
} catch (UnsupportedEncodingException e) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.INVALID_SECURITY,
"empty", new Object[] {"Attachment ID cannot be decoded: " + xopUri}
);
}
}
}
