34 lines
1.1 KiB
Java
34 lines
1.1 KiB
Java
package org.whispersystems.textsecure.util;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Map;
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public class DirectoryUtil {
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public static String getDirectoryServerToken(String e164number) {
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try {
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MessageDigest digest = MessageDigest.getInstance("SHA1");
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byte[] token = Util.trim(digest.digest(e164number.getBytes()), 10);
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return Base64.encodeBytesWithoutPadding(token);
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} catch (NoSuchAlgorithmException e) {
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throw new AssertionError(e);
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}
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}
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/**
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* Get a mapping of directory server tokens to their requested number.
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* @param e164numbers
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* @return map with token as key, E164 number as value
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*/
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public static Map<String, String> getDirectoryServerTokenMap(Collection<String> e164numbers) {
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final Map<String,String> tokenMap = new HashMap<String,String>(e164numbers.size());
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for (String number : e164numbers) {
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tokenMap.put(getDirectoryServerToken(number), number);
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}
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return tokenMap;
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}
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}
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