73 lines
2.0 KiB
Java
73 lines
2.0 KiB
Java
package envoy.data;
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import java.io.Serializable;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.Formatter;
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/**
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* Project: <strong>envoy-common</strong><br>
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* File: <strong>LoginCredentials.java</strong><br>
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* Created: <strong>29.12.2019</strong><br>
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*
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* @author Kai S. K. Engelbart
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* @since Envoy Common v0.2-alpha
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*/
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public class LoginCredentials implements Serializable {
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private static final long serialVersionUID = -7395245059059523314L;
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private final String name;
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private final byte[] passwordHash;
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/**
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* Creates an in stance of {@link LoginCredentials}.
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*
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* @param name the name of the user
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* @param password the password of the user (will be converted to a hash)
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* @throws NoSuchAlgorithmException if the algorithm used is unknown
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* @since Envoy Common v0.2-alpha
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*/
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public LoginCredentials(String name, char[] password) throws NoSuchAlgorithmException {
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this.name = name;
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passwordHash = getSha256(toByteArray(password));
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}
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/**
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* @return the name of the user performing the login
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* @since Envoy Common v0.2-alpha
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*/
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public String getName() { return name; }
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/**
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* @return the password hash of the user performing the login
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* @since Envoy Common v0.2-alpha
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*/
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public byte[] getPasswordHash() { return passwordHash; }
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private byte[] getSha256(byte[] input) throws NoSuchAlgorithmException {
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MessageDigest md = MessageDigest.getInstance("SHA-256");
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return md.digest(input);
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}
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private byte[] toByteArray(char[] chars) {
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byte[] bytes = new byte[chars.length * 2];
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for (int i = 0; i < chars.length; ++i) {
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bytes[i * 2] = (byte) (chars[i] >> 8);
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bytes[i * 2 + 1] = (byte) (chars[i]);
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}
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return bytes;
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}
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@Override
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public String toString() {
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try (Formatter form = new Formatter()) {
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form.format("LoginCredentials[name=%s,passwordHash=", name);
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for (byte element : passwordHash) {
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form.format("%02x", element);
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}
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form.format("]");
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String str = form.toString();
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return str;
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}
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}
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} |