diff options
Diffstat (limited to 'mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/DigestScheme.java')
| -rw-r--r-- | mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/DigestScheme.java | 489 |
1 files changed, 489 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/DigestScheme.java b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/DigestScheme.java new file mode 100644 index 000000000..542f6236b --- /dev/null +++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/DigestScheme.java @@ -0,0 +1,489 @@ +/* + * ==================================================================== + * 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. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + */ +package ch.boye.httpclientandroidlib.impl.auth; + +import java.io.IOException; +import java.nio.charset.Charset; +import java.security.MessageDigest; +import java.security.SecureRandom; +import java.util.ArrayList; +import java.util.Formatter; +import java.util.HashSet; +import java.util.List; +import java.util.Locale; +import java.util.Set; +import java.util.StringTokenizer; + +import ch.boye.httpclientandroidlib.Consts; +import ch.boye.httpclientandroidlib.Header; +import ch.boye.httpclientandroidlib.HttpEntity; +import ch.boye.httpclientandroidlib.HttpEntityEnclosingRequest; +import ch.boye.httpclientandroidlib.HttpRequest; +import ch.boye.httpclientandroidlib.annotation.NotThreadSafe; +import ch.boye.httpclientandroidlib.auth.AUTH; +import ch.boye.httpclientandroidlib.auth.AuthenticationException; +import ch.boye.httpclientandroidlib.auth.ChallengeState; +import ch.boye.httpclientandroidlib.auth.Credentials; +import ch.boye.httpclientandroidlib.auth.MalformedChallengeException; +import ch.boye.httpclientandroidlib.message.BasicHeaderValueFormatter; +import ch.boye.httpclientandroidlib.message.BasicNameValuePair; +import ch.boye.httpclientandroidlib.message.BufferedHeader; +import ch.boye.httpclientandroidlib.protocol.BasicHttpContext; +import ch.boye.httpclientandroidlib.protocol.HttpContext; +import ch.boye.httpclientandroidlib.util.Args; +import ch.boye.httpclientandroidlib.util.CharArrayBuffer; +import ch.boye.httpclientandroidlib.util.EncodingUtils; + +/** + * Digest authentication scheme as defined in RFC 2617. + * Both MD5 (default) and MD5-sess are supported. + * Currently only qop=auth or no qop is supported. qop=auth-int + * is unsupported. If auth and auth-int are provided, auth is + * used. + * <p/> + * Since the digest username is included as clear text in the generated + * Authentication header, the charset of the username must be compatible + * with the HTTP element charset used by the connection. + * + * @since 4.0 + */ +@NotThreadSafe +public class DigestScheme extends RFC2617Scheme { + + /** + * Hexa values used when creating 32 character long digest in HTTP DigestScheme + * in case of authentication. + * + * @see #encode(byte[]) + */ + private static final char[] HEXADECIMAL = { + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', + 'e', 'f' + }; + + /** Whether the digest authentication process is complete */ + private boolean complete; + + private static final int QOP_UNKNOWN = -1; + private static final int QOP_MISSING = 0; + private static final int QOP_AUTH_INT = 1; + private static final int QOP_AUTH = 2; + + private String lastNonce; + private long nounceCount; + private String cnonce; + private String a1; + private String a2; + + /** + * @since 4.3 + */ + public DigestScheme(final Charset credentialsCharset) { + super(credentialsCharset); + this.complete = false; + } + + /** + * Creates an instance of <tt>DigestScheme</tt> with the given challenge + * state. + * + * @since 4.2 + * + * @deprecated (4.3) do not use. + */ + @Deprecated + public DigestScheme(final ChallengeState challengeState) { + super(challengeState); + } + + public DigestScheme() { + this(Consts.ASCII); + } + + /** + * Processes the Digest challenge. + * + * @param header the challenge header + * + * @throws MalformedChallengeException is thrown if the authentication challenge + * is malformed + */ + @Override + public void processChallenge( + final Header header) throws MalformedChallengeException { + super.processChallenge(header); + this.complete = true; + } + + /** + * Tests if the Digest authentication process has been completed. + * + * @return <tt>true</tt> if Digest authorization has been processed, + * <tt>false</tt> otherwise. + */ + public boolean isComplete() { + final String s = getParameter("stale"); + if ("true".equalsIgnoreCase(s)) { + return false; + } else { + return this.complete; + } + } + + /** + * Returns textual designation of the digest authentication scheme. + * + * @return <code>digest</code> + */ + public String getSchemeName() { + return "digest"; + } + + /** + * Returns <tt>false</tt>. Digest authentication scheme is request based. + * + * @return <tt>false</tt>. + */ + public boolean isConnectionBased() { + return false; + } + + public void overrideParamter(final String name, final String value) { + getParameters().put(name, value); + } + + /** + * @deprecated (4.2) Use {@link ch.boye.httpclientandroidlib.auth.ContextAwareAuthScheme#authenticate( + * Credentials, HttpRequest, ch.boye.httpclientandroidlib.protocol.HttpContext)} + */ + @Deprecated + public Header authenticate( + final Credentials credentials, final HttpRequest request) throws AuthenticationException { + return authenticate(credentials, request, new BasicHttpContext()); + } + + /** + * Produces a digest authorization string for the given set of + * {@link Credentials}, method name and URI. + * + * @param credentials A set of credentials to be used for athentication + * @param request The request being authenticated + * + * @throws ch.boye.httpclientandroidlib.auth.InvalidCredentialsException if authentication credentials + * are not valid or not applicable for this authentication scheme + * @throws AuthenticationException if authorization string cannot + * be generated due to an authentication failure + * + * @return a digest authorization string + */ + @Override + public Header authenticate( + final Credentials credentials, + final HttpRequest request, + final HttpContext context) throws AuthenticationException { + + Args.notNull(credentials, "Credentials"); + Args.notNull(request, "HTTP request"); + if (getParameter("realm") == null) { + throw new AuthenticationException("missing realm in challenge"); + } + if (getParameter("nonce") == null) { + throw new AuthenticationException("missing nonce in challenge"); + } + // Add method name and request-URI to the parameter map + getParameters().put("methodname", request.getRequestLine().getMethod()); + getParameters().put("uri", request.getRequestLine().getUri()); + final String charset = getParameter("charset"); + if (charset == null) { + getParameters().put("charset", getCredentialsCharset(request)); + } + return createDigestHeader(credentials, request); + } + + private static MessageDigest createMessageDigest( + final String digAlg) throws UnsupportedDigestAlgorithmException { + try { + return MessageDigest.getInstance(digAlg); + } catch (final Exception e) { + throw new UnsupportedDigestAlgorithmException( + "Unsupported algorithm in HTTP Digest authentication: " + + digAlg); + } + } + + /** + * Creates digest-response header as defined in RFC2617. + * + * @param credentials User credentials + * + * @return The digest-response as String. + */ + private Header createDigestHeader( + final Credentials credentials, + final HttpRequest request) throws AuthenticationException { + final String uri = getParameter("uri"); + final String realm = getParameter("realm"); + final String nonce = getParameter("nonce"); + final String opaque = getParameter("opaque"); + final String method = getParameter("methodname"); + String algorithm = getParameter("algorithm"); + // If an algorithm is not specified, default to MD5. + if (algorithm == null) { + algorithm = "MD5"; + } + + final Set<String> qopset = new HashSet<String>(8); + int qop = QOP_UNKNOWN; + final String qoplist = getParameter("qop"); + if (qoplist != null) { + final StringTokenizer tok = new StringTokenizer(qoplist, ","); + while (tok.hasMoreTokens()) { + final String variant = tok.nextToken().trim(); + qopset.add(variant.toLowerCase(Locale.ENGLISH)); + } + if (request instanceof HttpEntityEnclosingRequest && qopset.contains("auth-int")) { + qop = QOP_AUTH_INT; + } else if (qopset.contains("auth")) { + qop = QOP_AUTH; + } + } else { + qop = QOP_MISSING; + } + + if (qop == QOP_UNKNOWN) { + throw new AuthenticationException("None of the qop methods is supported: " + qoplist); + } + + String charset = getParameter("charset"); + if (charset == null) { + charset = "ISO-8859-1"; + } + + String digAlg = algorithm; + if (digAlg.equalsIgnoreCase("MD5-sess")) { + digAlg = "MD5"; + } + + final MessageDigest digester; + try { + digester = createMessageDigest(digAlg); + } catch (final UnsupportedDigestAlgorithmException ex) { + throw new AuthenticationException("Unsuppported digest algorithm: " + digAlg); + } + + final String uname = credentials.getUserPrincipal().getName(); + final String pwd = credentials.getPassword(); + + if (nonce.equals(this.lastNonce)) { + nounceCount++; + } else { + nounceCount = 1; + cnonce = null; + lastNonce = nonce; + } + final StringBuilder sb = new StringBuilder(256); + final Formatter formatter = new Formatter(sb, Locale.US); + formatter.format("%08x", nounceCount); + formatter.close(); + final String nc = sb.toString(); + + if (cnonce == null) { + cnonce = createCnonce(); + } + + a1 = null; + a2 = null; + // 3.2.2.2: Calculating digest + if (algorithm.equalsIgnoreCase("MD5-sess")) { + // H( unq(username-value) ":" unq(realm-value) ":" passwd ) + // ":" unq(nonce-value) + // ":" unq(cnonce-value) + + // calculated one per session + sb.setLength(0); + sb.append(uname).append(':').append(realm).append(':').append(pwd); + final String checksum = encode(digester.digest(EncodingUtils.getBytes(sb.toString(), charset))); + sb.setLength(0); + sb.append(checksum).append(':').append(nonce).append(':').append(cnonce); + a1 = sb.toString(); + } else { + // unq(username-value) ":" unq(realm-value) ":" passwd + sb.setLength(0); + sb.append(uname).append(':').append(realm).append(':').append(pwd); + a1 = sb.toString(); + } + + final String hasha1 = encode(digester.digest(EncodingUtils.getBytes(a1, charset))); + + if (qop == QOP_AUTH) { + // Method ":" digest-uri-value + a2 = method + ':' + uri; + } else if (qop == QOP_AUTH_INT) { + // Method ":" digest-uri-value ":" H(entity-body) + HttpEntity entity = null; + if (request instanceof HttpEntityEnclosingRequest) { + entity = ((HttpEntityEnclosingRequest) request).getEntity(); + } + if (entity != null && !entity.isRepeatable()) { + // If the entity is not repeatable, try falling back onto QOP_AUTH + if (qopset.contains("auth")) { + qop = QOP_AUTH; + a2 = method + ':' + uri; + } else { + throw new AuthenticationException("Qop auth-int cannot be used with " + + "a non-repeatable entity"); + } + } else { + final HttpEntityDigester entityDigester = new HttpEntityDigester(digester); + try { + if (entity != null) { + entity.writeTo(entityDigester); + } + entityDigester.close(); + } catch (final IOException ex) { + throw new AuthenticationException("I/O error reading entity content", ex); + } + a2 = method + ':' + uri + ':' + encode(entityDigester.getDigest()); + } + } else { + a2 = method + ':' + uri; + } + + final String hasha2 = encode(digester.digest(EncodingUtils.getBytes(a2, charset))); + + // 3.2.2.1 + + final String digestValue; + if (qop == QOP_MISSING) { + sb.setLength(0); + sb.append(hasha1).append(':').append(nonce).append(':').append(hasha2); + digestValue = sb.toString(); + } else { + sb.setLength(0); + sb.append(hasha1).append(':').append(nonce).append(':').append(nc).append(':') + .append(cnonce).append(':').append(qop == QOP_AUTH_INT ? "auth-int" : "auth") + .append(':').append(hasha2); + digestValue = sb.toString(); + } + + final String digest = encode(digester.digest(EncodingUtils.getAsciiBytes(digestValue))); + + final CharArrayBuffer buffer = new CharArrayBuffer(128); + if (isProxy()) { + buffer.append(AUTH.PROXY_AUTH_RESP); + } else { + buffer.append(AUTH.WWW_AUTH_RESP); + } + buffer.append(": Digest "); + + final List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(20); + params.add(new BasicNameValuePair("username", uname)); + params.add(new BasicNameValuePair("realm", realm)); + params.add(new BasicNameValuePair("nonce", nonce)); + params.add(new BasicNameValuePair("uri", uri)); + params.add(new BasicNameValuePair("response", digest)); + + if (qop != QOP_MISSING) { + params.add(new BasicNameValuePair("qop", qop == QOP_AUTH_INT ? "auth-int" : "auth")); + params.add(new BasicNameValuePair("nc", nc)); + params.add(new BasicNameValuePair("cnonce", cnonce)); + } + // algorithm cannot be null here + params.add(new BasicNameValuePair("algorithm", algorithm)); + if (opaque != null) { + params.add(new BasicNameValuePair("opaque", opaque)); + } + + for (int i = 0; i < params.size(); i++) { + final BasicNameValuePair param = params.get(i); + if (i > 0) { + buffer.append(", "); + } + final String name = param.getName(); + final boolean noQuotes = ("nc".equals(name) || "qop".equals(name) + || "algorithm".equals(name)); + BasicHeaderValueFormatter.INSTANCE.formatNameValuePair(buffer, param, !noQuotes); + } + return new BufferedHeader(buffer); + } + + String getCnonce() { + return cnonce; + } + + String getA1() { + return a1; + } + + String getA2() { + return a2; + } + + /** + * Encodes the 128 bit (16 bytes) MD5 digest into a 32 characters long + * <CODE>String</CODE> according to RFC 2617. + * + * @param binaryData array containing the digest + * @return encoded MD5, or <CODE>null</CODE> if encoding failed + */ + static String encode(final byte[] binaryData) { + final int n = binaryData.length; + final char[] buffer = new char[n * 2]; + for (int i = 0; i < n; i++) { + final int low = (binaryData[i] & 0x0f); + final int high = ((binaryData[i] & 0xf0) >> 4); + buffer[i * 2] = HEXADECIMAL[high]; + buffer[(i * 2) + 1] = HEXADECIMAL[low]; + } + + return new String(buffer); + } + + + /** + * Creates a random cnonce value based on the current time. + * + * @return The cnonce value as String. + */ + public static String createCnonce() { + final SecureRandom rnd = new SecureRandom(); + final byte[] tmp = new byte[8]; + rnd.nextBytes(tmp); + return encode(tmp); + } + + @Override + public String toString() { + final StringBuilder builder = new StringBuilder(); + builder.append("DIGEST [complete=").append(complete) + .append(", nonce=").append(lastNonce) + .append(", nc=").append(nounceCount) + .append("]"); + return builder.toString(); + } + +} |