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SEC-448: MD4 password encode implementation.

This commit is contained in:
Luke Taylor 2007-09-19 15:28:57 +00:00
parent 2ef2bfc514
commit 03beaf0777
3 changed files with 319 additions and 0 deletions
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179
core/src/main/java/org/acegisecurity/providers/encoding/Md4.java Normal file
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/* Copyright 2004, 2005, 2006, 2007 Acegi Technology Pty Limited
*
* 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.
*/
package org.acegisecurity.providers.encoding;
/**
* Implementation of the MD4 message digest derived from the RSA Data Security, Inc, MD4 Message-Digest Algorithm.
*
* @author Alan Stewart
*/
class Md4 {
private static final int BLOCK_SIZE = 64;
private static final int HASH_SIZE = 16;
private final byte[] buffer = new byte[BLOCK_SIZE];
private int bufferOffset;
private long byteCount;
private int[] state = new int[4];
private int[] tmp = new int[16];
Md4() {
reset();
}
public void reset() {
bufferOffset = 0;
byteCount = 0;
state[0] = 0x67452301;
state[1] = 0xEFCDAB89;
state[2] = 0x98BADCFE;
state[3] = 0x10325476;
}
public byte[] digest() {
byte[] resBuf = new byte[HASH_SIZE];
digest(resBuf, 0, HASH_SIZE);
return resBuf;
}
private void digest(byte[] buffer, int off) {
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
buffer[off + (i * 4 + j)] = (byte) (state[i] >>> (8 * j));
}
}
}
private void digest(byte[] buffer, int offset, int len) {
this.buffer[this.bufferOffset++] = (byte) 0x80;
int lenOfBitLen = 8;
int C = BLOCK_SIZE - lenOfBitLen;
if (this.bufferOffset > C) {
while (this.bufferOffset < BLOCK_SIZE) {
this.buffer[this.bufferOffset++] = (byte) 0x00;
}
update(this.buffer, 0);
this.bufferOffset = 0;
}
while (this.bufferOffset < C) {
this.buffer[this.bufferOffset++] = (byte) 0x00;
}
long bitCount = byteCount * 8;
for (int i = 0; i < 64; i += 8) {
this.buffer[this.bufferOffset++] = (byte) (bitCount >>> (i));
}
update(this.buffer, 0);
digest(buffer, offset);
}
public void update(byte[] input, int offset, int length) {
byteCount += length;
int todo;
while (length >= (todo = BLOCK_SIZE - this.bufferOffset)) {
System.arraycopy(input, offset, this.buffer, this.bufferOffset, todo);
update(this.buffer, 0);
length -= todo;
offset += todo;
this.bufferOffset = 0;
}
System.arraycopy(input, offset, this.buffer, this.bufferOffset, length);
bufferOffset += length;
}
private void update(byte[] block, int offset) {
for (int i = 0; i < 16; i++) {
tmp[i] = (block[offset++] & 0xFF) | (block[offset++] & 0xFF) << 8 | (block[offset++] & 0xFF) << 16 | (block[offset++] & 0xFF) << 24;
}
int A = state[0];
int B = state[1];
int C = state[2];
int D = state[3];
A = FF(A, B, C, D, tmp[0], 3);
D = FF(D, A, B, C, tmp[1], 7);
C = FF(C, D, A, B, tmp[2], 11);
B = FF(B, C, D, A, tmp[3], 19);
A = FF(A, B, C, D, tmp[4], 3);
D = FF(D, A, B, C, tmp[5], 7);
C = FF(C, D, A, B, tmp[6], 11);
B = FF(B, C, D, A, tmp[7], 19);
A = FF(A, B, C, D, tmp[8], 3);
D = FF(D, A, B, C, tmp[9], 7);
C = FF(C, D, A, B, tmp[10], 11);
B = FF(B, C, D, A, tmp[11], 19);
A = FF(A, B, C, D, tmp[12], 3);
D = FF(D, A, B, C, tmp[13], 7);
C = FF(C, D, A, B, tmp[14], 11);
B = FF(B, C, D, A, tmp[15], 19);
A = GG(A, B, C, D, tmp[0], 3);
D = GG(D, A, B, C, tmp[4], 5);
C = GG(C, D, A, B, tmp[8], 9);
B = GG(B, C, D, A, tmp[12], 13);
A = GG(A, B, C, D, tmp[1], 3);
D = GG(D, A, B, C, tmp[5], 5);
C = GG(C, D, A, B, tmp[9], 9);
B = GG(B, C, D, A, tmp[13], 13);
A = GG(A, B, C, D, tmp[2], 3);
D = GG(D, A, B, C, tmp[6], 5);
C = GG(C, D, A, B, tmp[10], 9);
B = GG(B, C, D, A, tmp[14], 13);
A = GG(A, B, C, D, tmp[3], 3);
D = GG(D, A, B, C, tmp[7], 5);
C = GG(C, D, A, B, tmp[11], 9);
B = GG(B, C, D, A, tmp[15], 13);
A = HH(A, B, C, D, tmp[0], 3);
D = HH(D, A, B, C, tmp[8], 9);
C = HH(C, D, A, B, tmp[4], 11);
B = HH(B, C, D, A, tmp[12], 15);
A = HH(A, B, C, D, tmp[2], 3);
D = HH(D, A, B, C, tmp[10], 9);
C = HH(C, D, A, B, tmp[6], 11);
B = HH(B, C, D, A, tmp[14], 15);
A = HH(A, B, C, D, tmp[1], 3);
D = HH(D, A, B, C, tmp[9], 9);
C = HH(C, D, A, B, tmp[5], 11);
B = HH(B, C, D, A, tmp[13], 15);
A = HH(A, B, C, D, tmp[3], 3);
D = HH(D, A, B, C, tmp[11], 9);
C = HH(C, D, A, B, tmp[7], 11);
B = HH(B, C, D, A, tmp[15], 15);
state[0] += A;
state[1] += B;
state[2] += C;
state[3] += D;
}
private int FF(int a, int b, int c, int d, int x, int s) {
int t = a + ((b & c) | (~b & d)) + x;
return t << s | t >>> (32 - s);
}
private int GG(int a, int b, int c, int d, int x, int s) {
int t = a + ((b & (c | d)) | (c & d)) + x + 0x5A827999;
return t << s | t >>> (32 - s);
}
private int HH(int a, int b, int c, int d, int x, int s) {
int t = a + (b ^ c ^ d) + x + 0x6ED9EBA1;
return t << s | t >>> (32 - s);
}
}

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core/src/main/java/org/acegisecurity/providers/encoding/Md4PasswordEncoder.java Normal file
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/* Copyright 2004, 2005, 2006, 2007 Acegi Technology Pty Limited
*
* 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.
*/
package org.acegisecurity.providers.encoding;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
/**
* MD4 implementation of PasswordEncoder.
* <p>
* If a <code>null</code> password is presented, it will be treated as an empty <code>String</code> ("") password.
* <p>
* As MD4 is a one-way hash, the salt can contain any characters.
* <p>
* <b>NOTE:</b> This password encoder is only included for backwards compatability with legacy applications, it's not
* secure, don't use it for anything new!
*
* @author Alan Stewart
*/
public class Md4PasswordEncoder extends BaseDigestPasswordEncoder {
//~ Methods ========================================================================================================
/**
* Encodes the rawPass using an MD4 message digest. If a salt is specified it will be merged with the password
* before encoding.
*
* @param rawPass The plain text password
* @param salt The salt to sprinkle
* @return Hex string of password digest (or base64 encoded string if encodeHashAsBase64 is enabled.
*/
public String encodePassword(String rawPass, Object salt) {
String saltedPass = mergePasswordAndSalt(rawPass, salt, false);
Md4 md4 = new Md4();
md4.update(saltedPass.getBytes(), 0, saltedPass.length());
byte[] resBuf = md4.digest();
if (getEncodeHashAsBase64()) {
return new String(Base64.encodeBase64(resBuf));
} else {
return new String(Hex.encodeHex(resBuf));
}
}
/**
* Takes a previously encoded password and compares it with a raw password after mixing in the salt and
* encoding that value.
*
* @param encPass previously encoded password
* @param rawPass plain text password
* @param salt salt to mix into password
* @return true or false
*/
public boolean isPasswordValid(String encPass, String rawPass, Object salt) {
String pass1 = "" + encPass;
String pass2 = encodePassword(rawPass, salt);
return pass1.equals(pass2);
}
public String getAlgorithm() {
return "MD4";
}
}

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core/src/test/java/org/acegisecurity/providers/encoding/Md4PasswordEncoderTests.java Normal file
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/* Copyright 2004, 2005, 2006, 2007 Acegi Technology Pty Limited
*
* 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.
*/
package org.acegisecurity.providers.encoding;
import junit.framework.TestCase;
public class Md4PasswordEncoderTests extends TestCase {
public void testEncodeUnsaltedPassword() {
Md4PasswordEncoder md4 = new Md4PasswordEncoder();
md4.setEncodeHashAsBase64(true);
String encodedPassword = md4.encodePassword("ww_uni123", null);
assertEquals("8zobtq72iAt0W6KNqavGwg==", encodedPassword);
}
public void testEncodeSaltedPassword() {
Md4PasswordEncoder md4 = new Md4PasswordEncoder();
md4.setEncodeHashAsBase64(true);
String encodedPassword = md4.encodePassword("ww_uni123", "Alan K Stewart");
assertEquals("ZplT6P5Kv6Rlu6W4FIoYNA==", encodedPassword);
}
public void testEncodeNullPassword() {
Md4PasswordEncoder md4 = new Md4PasswordEncoder();
md4.setEncodeHashAsBase64(true);
String encodedPassword = md4.encodePassword(null, null);
assertEquals("MdbP4NFq6TG3PFnX4MCJwA==", encodedPassword);
}
public void testEncodeEmptyPassword() {
Md4PasswordEncoder md4 = new Md4PasswordEncoder();
md4.setEncodeHashAsBase64(true);
String encodedPassword = md4.encodePassword("", null);
assertEquals("MdbP4NFq6TG3PFnX4MCJwA==", encodedPassword);
}
public void testIsHexPasswordValid() {
Md4PasswordEncoder md4 = new Md4PasswordEncoder();
assertTrue(md4.isPasswordValid("31d6cfe0d16ae931b73c59d7e0c089c0", "", null));
}
public void testIsPasswordValid() {
Md4PasswordEncoder md4 = new Md4PasswordEncoder();
md4.setEncodeHashAsBase64(true);
assertTrue(md4.isPasswordValid("8zobtq72iAt0W6KNqavGwg==", "ww_uni123", null));
}
public void testIsSaltedPasswordValid() {
Md4PasswordEncoder md4 = new Md4PasswordEncoder();
md4.setEncodeHashAsBase64(true);
assertTrue(md4.isPasswordValid("ZplT6P5Kv6Rlu6W4FIoYNA==", "ww_uni123", "Alan K Stewart"));
}
}