33 lines
872 B
Java
33 lines
872 B
Java
package envoy.server.util;
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import java.security.SecureRandom;
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/**
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* Provides a secure token generation algorithm.
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*
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* @author Kai S. K. Engelbart
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* @since Envoy Server v0.2-beta
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*/
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public final class AuthTokenGenerator {
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private static final int TOKEN_LENGTH = 128;
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private static final char[] CHARACTERS =
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"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".toCharArray();
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private static final char[] BUFF = new char[TOKEN_LENGTH];
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private static final SecureRandom RANDOM = new SecureRandom();
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private AuthTokenGenerator() {}
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/**
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* Generates a random authentication token.
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*
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* @return a random authentication token
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* @since Envoy Server v0.2-beta
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*/
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public static String nextToken() {
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for (int i = 0; i < BUFF.length; ++i)
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BUFF[i] = CHARACTERS[RANDOM.nextInt(CHARACTERS.length)];
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return new String(BUFF);
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}
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}
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