我试图模仿Drupal 7在Java中检查正确密码的方式.
在这里找到一些代码作为指导：https://github.com/CraftFire/AuthDB-Legacy/blob/master/src/main/java/com/authdb/scripts/cms/Drupal.java并提取我需要的代码.
然而,当我给出密码和散列版本(为了提取所需的盐和迭代量)时,我会得到不同的结果.
密码是使用Drupal密码哈希脚本生成的
导致：
Expected value = $S$DxVn7wubSRzoK9X2pkGx4njeDRkLEgdqPphc2ZXkkb8Viy8JEGf3
Calculated value = $S$DxVn7wubSpQ1CpUnBZZHNqIXMp2XMVZHMYBqAs24NsUHMY7HBkYn
Expected value = $S$DOASeKfBzZoqgSRl/mBnK06GlLESyMHZ81jyUueEBiCrkkxxArpR
Calculated value = $S$DOASeKfBzs.XMVZ1NkYXNmIqMpEHAoEaMYJ1NmUHCZJaBZFnAZFX
任何人都能帮助我/告诉我这里我做错了什么？
谢谢.
码：
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
class test {
public static void main(String args[]) {
// Passwords and hashes generated by Drupal.
checkPassword("test" , "$S$DxVn7wubSRzoK9X2pkGx4njeDRkLEgdqPphc2ZXkkb8Viy8JEGf3");
checkPassword("barbaz", "$S$DOASeKfBzZoqgSRl/mBnK06GlLESyMHZ81jyUueEBiCrkkxxArpR");
}
private static String itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
private static final int DRUPAL_HASH_LENGTH = 55;
private static int password_get_count_log2(String setting) { return itoa64.indexOf(setting.charAt(3)); }
/**
* Note: taken from the default Drupal 7 password algorithm
* @param candidate
* the clear text password
* @param saltedEncryptedPassword
* the salted encrypted password string to check => NEEDS TO BE THE DEFAULT DRUPAL 7 PASSWORD HASH.
* @return true if the candidate matches, false otherwise.
*/
public static boolean checkPassword(String candidate, String saltedEncryptedPassword) {
if (candidate == null) {
return false;
}
if (saltedEncryptedPassword == null) {
return false;
}
String hash = password_crypt(candidate, saltedEncryptedPassword);
System.out.println("Tested value = " + saltedEncryptedPassword);
System.out.println("Calced value = " + hash);
return hash == saltedEncryptedPassword;
}
public static String SHA512(String text) {
byte[] sha1hash = new byte[40];
try {
MessageDigest md = MessageDigest.getInstance("SHA-512");
md.update(text.getBytes("UTF-8"), 0, text.length());
sha1hash = md.digest();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return convertToHex(sha1hash);
}
private static String convertToHex(byte[] data) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
int halfbyte = (data[i] >>> 4) & 0x0F;
int two_halfs = 0;
do {
if ((0 <= halfbyte) && (halfbyte <= 9))
buf.append((char) ('0' + halfbyte));
else
buf.append((char) ('a' + (halfbyte - 10)));
halfbyte = data[i] & 0x0F;
}
while(two_halfs++ < 1);
}
return buf.toString();
}
private static String password_crypt(String password, String setting) {
// The first 12 characters of an existing hash are its setting string.
setting = setting.substring(0, 12);
int count_log2 = password_get_count_log2(setting);
String salt = setting.substring(4, 12);
// Hashes must have an 8 character salt.
if (salt.length() != 8) {
return null;
}
// Convert the base 2 logarithm into an integer.
int count = 1 << count_log2;
String hash;
try {
hash = SHA512(salt + password);
do {
hash = SHA512(hash + password);
} while (--count >= 0);
} catch(Exception e) {
return null;
}
int len = hash.length();
String output = setting + password_base64_encode(hash, len);
return (output.length() > 0) ? output.substring(0, DRUPAL_HASH_LENGTH) : null;
}
private static String password_base64_encode(String input, int count) {
StringBuffer output = new StringBuffer();
int i = 0, value;
do {
value = input.charAt(i++);
output.append(itoa64.charAt(value & 0x3f));
if (i < count) {
value |= input.charAt(i) << 8;
}
output.append(itoa64.charAt((value >> 6) & 0x3f));
if (i++ >= count) {
break;
}
if (i < count) {
value |= input.charAt(i) << 16;
}
output.append(itoa64.charAt((value >> 12) & 0x3f));
if (i++ >= count) {
break;
}
output.append(itoa64.charAt((value >> 18) & 0x3f));
} while (i < count);
return output.toString();
}
}
–
PS.
我已经看到的一件事是：
考虑这些功能：
public String convertToHex(byte[] data) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
int halfbyte = (data[i] >>> 4) & 0x0F;
int two_halfs = 0;
do {
if ((0 <= halfbyte) && (halfbyte <= 9))
buf.append((char) ('0' + halfbyte));
else
buf.append((char) ('a' + (halfbyte - 10)));
halfbyte = data[i] & 0x0F;
}
while(two_halfs++ < 1);
}
return buf.toString();
}
和
public String convertToHex(byte [] raw) {
StringBuilder hex = new StringBuilder(2 * raw.length);
for (final byte b : raw) {
int hiVal = (b & 0xF0) >> 4;
int loVal = b & 0x0F;
hex.append((char) ('0' + (hiVal + (hiVal / 10 * 7))));
hex.append((char) ('0' + (loVal + (loVal / 10 * 7))));
}
return hex.toString();
}
第一个函数将字符串作为小写返回,第二个函数作为高级字符串返回.不知道使用哪个,最终都会返回不同的结果,但两者都不令人满意.
-编辑-
差不多了？？？…
更进一步,稍微改变了一下问题……
在Drupal中使用以下函数：
$hash = hash($algo, $salt . $password, TRUE);
返回
'���Y�emb
ӈ3����4��q����h�osab��V�!IS�uC�*[�
如您所见,我们不需要十六进制版本,因为您将获得完全不同的哈希值…
所以我改变了java中的代码：
public byte[] SHA512(String text) {
byte[] sha1hash = new byte[50];
try {
MessageDigest md = MessageDigest.getInstance("SHA-512");
md.update(text.getBytes("UTF-8"), 0, text.length());
sha1hash = md.digest();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return sha1hash;
}
--snip--
hash = new String(SHA512(salt + password));
System.out.println(hash);
返回：
'���Y�emb
ӈ3����4��q���h�osab��V�!IS�uC�*[�
正如你所看到的那样几乎一样……
php: ӈ3����4��q����h�osab��V�!IS�uC�*[�
java: ӈ3����4��q���h�osab��V�!IS�uC�*[�
任何人都知道如何修复最后一部分？
形式为新的String(SHA512(盐密码,’Whatevercodec’));没帮我…
谢谢！
解决方法:
我建议你这样做：
import java.security.NoSuchAlgorithmException;
public class hash {
private static final int DRUPAL_HASH_LENGTH = 55;
private static String _password_itoa64() {
return "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
}
public static void main(String args[]) throws Exception {
// Passwords and hashes generated by Drupal.
checkPassword("adrian", "$S$DNbBTrkalsPChLsqajHUQS18pBBxzSTQW0310SzivTy7HDQ.zgyG");
checkPassword("test" , "$S$DxVn7wubSRzoK9X2pkGx4njeDRkLEgdqPphc2ZXkkb8Viy8JEGf3");
checkPassword("barbaz", "$S$DOASeKfBzZoqgSRl/mBnK06GlLESyMHZ81jyUueEBiCrkkxxArpR");
}
private static int password_get_count_log2(String setting) {
return _password_itoa64().indexOf(setting.charAt(3));
}
private static byte[] sha512(String input) {
try {
return java.security.MessageDigest.getInstance("SHA-512").digest(input.getBytes());
} catch (NoSuchAlgorithmException ex) {
ex.printStackTrace();
}
return new byte[0];
}
private static byte[] sha512(byte[] input) {
try {
return java.security.MessageDigest.getInstance("SHA-512").digest(input);
} catch (NoSuchAlgorithmException ex) {
ex.printStackTrace();
}
return new byte[0];
}
/**
* Note: taken from the default Drupal 7 password algorithm
*
* @param candidate the clear text password
* @param saltedEncryptedPassword the salted encrypted password string to check => NEEDS TO BE THE DEFAULT DRUPAL 7 PASSWORD HASH.
* @return true if the candidate matches, false otherwise.
*/
public static boolean checkPassword(String candidate, String saltedEncryptedPassword) throws Exception {
if (candidate == null || saltedEncryptedPassword == null) {
return false;
}
String hash = password_crypt(candidate, saltedEncryptedPassword);
System.out.println("Expected value = " + saltedEncryptedPassword);
System.out.println("Calced value = " + hash);
System.out.println("Result Good? = " + saltedEncryptedPassword.equalsIgnoreCase(hash));
return saltedEncryptedPassword.equalsIgnoreCase(hash);
}
private static String password_crypt(String password, String passwordHash) throws Exception {
// The first 12 characters of an existing hash are its setting string.
passwordHash = passwordHash.substring(0, 12);
int count_log2 = password_get_count_log2(passwordHash);
String salt = passwordHash.substring(4, 12);
// Hashes must have an 8 character salt.
if (salt.length() != 8) {
return null;
}
int count = 1 << count_log2;
byte[] hash;
try {
hash = sha512(salt.concat(password));
do {
hash = sha512(joinBytes(hash, password.getBytes("UTF-8")));
} while (--count > 0);
} catch (Exception e) {
System.out.println("error " + e.toString());
return null;
}
String output = passwordHash + _password_base64_encode(hash, hash.length);
return (output.length() > 0) ? output.substring(0, DRUPAL_HASH_LENGTH) : null;
}
private static byte[] joinBytes(byte[] a, byte[] b) {
byte[] combined = new byte[a.length + b.length];
System.arraycopy(a, 0, combined, 0, a.length);
System.arraycopy(b, 0, combined, a.length, b.length);
return combined;
}
private static String _password_base64_encode(byte[] input, int count) throws Exception {
StringBuffer output = new StringBuffer();
int i = 0;
CharSequence itoa64 = _password_itoa64();
do {
long value = SignedByteToUnsignedLong(input[i++]);
output.append(itoa64.charAt((int) value & 0x3f));
if (i < count) {
value |= SignedByteToUnsignedLong(input[i]) << 8;
}
output.append(itoa64.charAt((int) (value >> 6) & 0x3f));
if (i++ >= count) {
break;
}
if (i < count) {
value |= SignedByteToUnsignedLong(input[i]) << 16;
}
output.append(itoa64.charAt((int) (value >> 12) & 0x3f));
if (i++ >= count) {
break;
}
output.append(itoa64.charAt((int) (value >> 18) & 0x3f));
} while (i < count);
return output.toString();
}
public static long SignedByteToUnsignedLong(byte b) {
return b & 0xFF;
}
}