mirror of
https://github.com/pgpainless/pgpainless.git
synced 2024-11-14 16:32:06 +01:00
Kotlin conversion: Passphrase
This commit is contained in:
parent
abae6933c1
commit
5d0b2dfb77
GPG key ID:
62BEE9264BF17311
2 changed files with 105 additions and 168 deletions
|
|
@ -1,168 +0,0 @@
|
|||
// SPDX-FileCopyrightText: 2018 Paul Schaub <vanitasvitae@fsfe.org>
|
||||
//
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
package org.pgpainless.util;
|
||||
|
||||
import javax.annotation.Nonnull;
|
||||
import javax.annotation.Nullable;
|
||||
import java.util.Arrays;
|
||||
|
||||
public class Passphrase {
|
||||
|
||||
public final Object lock = new Object();
|
||||
|
||||
private final char[] chars;
|
||||
private boolean valid = true;
|
||||
|
||||
/**
|
||||
* Passphrase for keys etc.
|
||||
*
|
||||
* @param chars may be null for empty passwords.
|
||||
*/
|
||||
public Passphrase(@Nullable char[] chars) {
|
||||
if (chars == null) {
|
||||
this.chars = null;
|
||||
} else {
|
||||
char[] trimmed = removeTrailingAndLeadingWhitespace(chars);
|
||||
if (trimmed.length == 0) {
|
||||
this.chars = null;
|
||||
} else {
|
||||
this.chars = trimmed;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a copy of the passed in char array, with leading and trailing whitespace characters removed.
|
||||
*
|
||||
* @param chars char array
|
||||
* @return copy of char array with leading and trailing whitespace characters removed
|
||||
*/
|
||||
private static char[] removeTrailingAndLeadingWhitespace(char[] chars) {
|
||||
int i = 0;
|
||||
while (i < chars.length && isWhitespace(chars[i])) {
|
||||
i++;
|
||||
}
|
||||
int j = chars.length - 1;
|
||||
while (j >= i && isWhitespace(chars[j])) {
|
||||
j--;
|
||||
}
|
||||
|
||||
char[] trimmed = new char[chars.length - i - (chars.length - 1 - j)];
|
||||
System.arraycopy(chars, i, trimmed, 0, trimmed.length);
|
||||
|
||||
return trimmed;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true, if the passed in char is a whitespace symbol (space, newline, tab).
|
||||
*
|
||||
* @param xar char
|
||||
* @return true if whitespace
|
||||
*/
|
||||
private static boolean isWhitespace(char xar) {
|
||||
return xar == ' ' || xar == '\n' || xar == '\t';
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a {@link Passphrase} from a {@link String}.
|
||||
*
|
||||
* @param password password
|
||||
* @return passphrase
|
||||
*/
|
||||
public static Passphrase fromPassword(@Nonnull String password) {
|
||||
return new Passphrase(password.toCharArray());
|
||||
}
|
||||
|
||||
/**
|
||||
* Overwrite the char array with spaces and mark the {@link Passphrase} as invalidated.
|
||||
*/
|
||||
public void clear() {
|
||||
synchronized (lock) {
|
||||
if (chars != null) {
|
||||
Arrays.fill(chars, ' ');
|
||||
}
|
||||
valid = false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a copy of the underlying char array.
|
||||
* A return value of {@code null} represents no password.
|
||||
*
|
||||
* @return passphrase chars.
|
||||
*
|
||||
* @throws IllegalStateException in case the password has been cleared at this point.
|
||||
*/
|
||||
public @Nullable char[] getChars() {
|
||||
synchronized (lock) {
|
||||
if (!valid) {
|
||||
throw new IllegalStateException("Passphrase has been cleared.");
|
||||
}
|
||||
|
||||
if (chars == null) {
|
||||
return null;
|
||||
}
|
||||
|
||||
char[] copy = new char[chars.length];
|
||||
System.arraycopy(chars, 0, copy, 0, chars.length);
|
||||
return copy;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the passphrase has not yet been cleared.
|
||||
*
|
||||
* @return valid
|
||||
*/
|
||||
public boolean isValid() {
|
||||
synchronized (lock) {
|
||||
return valid;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the passphrase represents no password.
|
||||
*
|
||||
* @return empty
|
||||
*/
|
||||
public boolean isEmpty() {
|
||||
synchronized (lock) {
|
||||
return valid && chars == null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Represents a {@link Passphrase} instance that represents no password.
|
||||
*
|
||||
* @return empty passphrase
|
||||
*/
|
||||
public static Passphrase emptyPassphrase() {
|
||||
return new Passphrase(null);
|
||||
}
|
||||
|
||||
@Override
|
||||
public int hashCode() {
|
||||
if (getChars() == null) {
|
||||
return 0;
|
||||
}
|
||||
return new String(getChars()).hashCode();
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean equals(Object obj) {
|
||||
if (obj == null) {
|
||||
return false;
|
||||
}
|
||||
if (this == obj) {
|
||||
return true;
|
||||
}
|
||||
if (!(obj instanceof Passphrase)) {
|
||||
return false;
|
||||
}
|
||||
Passphrase other = (Passphrase) obj;
|
||||
return (getChars() == null && other.getChars() == null) ||
|
||||
org.bouncycastle.util.Arrays.constantTimeAreEqual(getChars(), other.getChars());
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,105 @@
|
|||
// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
|
||||
//
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
package org.pgpainless.util
|
||||
|
||||
import org.bouncycastle.util.Arrays
|
||||
|
||||
/**
|
||||
* Passphrase for keys or messages.
|
||||
*
|
||||
* @param chars may be null for empty passwords.
|
||||
*/
|
||||
class Passphrase(
|
||||
chars: CharArray?
|
||||
) {
|
||||
private val lock = Any()
|
||||
private var valid = true
|
||||
private val chars: CharArray?
|
||||
|
||||
init {
|
||||
this.chars = trimWhitespace(chars)
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a copy of the underlying char array.
|
||||
* A return value of null represents an empty password.
|
||||
*
|
||||
* @return passphrase chars.
|
||||
*
|
||||
* @throws IllegalStateException in case the password has been cleared at this point.
|
||||
*/
|
||||
fun getChars(): CharArray? = synchronized(lock) {
|
||||
check(valid) { "Passphrase has been cleared." }
|
||||
chars?.copyOf()
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the passphrase has not yet been cleared.
|
||||
*
|
||||
* @return valid
|
||||
*/
|
||||
val isValid: Boolean
|
||||
get() = synchronized(lock) { valid }
|
||||
|
||||
/**
|
||||
* Return true if the passphrase represents no password.
|
||||
*
|
||||
* @return empty
|
||||
*/
|
||||
val isEmpty: Boolean
|
||||
get() = synchronized(lock) { valid && chars == null }
|
||||
|
||||
/**
|
||||
* Overwrite the char array with spaces and mark the [Passphrase] as invalidated.
|
||||
*/
|
||||
fun clear() = synchronized(lock) {
|
||||
chars?.fill(' ')
|
||||
valid = false
|
||||
}
|
||||
|
||||
override fun equals(other: Any?): Boolean {
|
||||
return if (other == null)
|
||||
false
|
||||
else if (this === other)
|
||||
true
|
||||
else if (other !is Passphrase)
|
||||
false
|
||||
else
|
||||
getChars() == null && other.getChars() == null || Arrays.constantTimeAreEqual(getChars(), other.getChars())
|
||||
}
|
||||
|
||||
override fun hashCode(): Int = getChars()?.let { String(it) }.hashCode()
|
||||
|
||||
companion object {
|
||||
|
||||
/**
|
||||
* Create a [Passphrase] from a [CharSequence].
|
||||
*
|
||||
* @param password password
|
||||
* @return passphrase
|
||||
*/
|
||||
@JvmStatic
|
||||
fun fromPassword(password: CharSequence) = Passphrase(password.toString().toCharArray())
|
||||
|
||||
@JvmStatic
|
||||
fun emptyPassphrase() = Passphrase(null)
|
||||
|
||||
/**
|
||||
* Return a copy of the passed in char array, with leading and trailing whitespace characters removed.
|
||||
* If the passed in char array is null, return null.
|
||||
* If the resulting char array is empty, return null as well.
|
||||
*
|
||||
* @param chars char array
|
||||
* @return copy of char array with leading and trailing whitespace characters removed
|
||||
*/
|
||||
@JvmStatic
|
||||
private fun trimWhitespace(chars: CharArray?): CharArray? {
|
||||
return chars?.dropWhile { it.isWhitespace() }
|
||||
?.dropLastWhile { it.isWhitespace() }
|
||||
?.toCharArray()
|
||||
?.let { if (it.isEmpty()) null else it }
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue