30 lines
1.1 KiB
Java
30 lines
1.1 KiB
Java
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package app.playmancala.game;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.HexFormat;
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import app.playmancala.auth.KeycloakTokenVerifier;
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// Ids of legacy userKey users are the secret they log in with, so anything saved or listed publicly uses a hash
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// instead. Keycloak ids are not secret and stay as they are.
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public final class PublicIds {
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private static final String LEGACY_PUBLIC_ID_PREFIX = "legacy:";
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private PublicIds() {
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}
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public static String publicUserId(String userId) {
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if (userId.startsWith(KeycloakTokenVerifier.KEYCLOAK_USER_ID_PREFIX) || userId.startsWith(LEGACY_PUBLIC_ID_PREFIX)) {
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return userId;
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}
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try {
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byte[] hash = MessageDigest.getInstance("SHA-256").digest(userId.getBytes(StandardCharsets.UTF_8));
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return LEGACY_PUBLIC_ID_PREFIX + HexFormat.of().formatHex(hash).substring(0, 20);
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} catch (NoSuchAlgorithmException e) {
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throw new IllegalStateException(e);
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}
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}
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}
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