35 lines
1.1 KiB
Java
35 lines
1.1 KiB
Java
package eu.siacs.conversations.utils;
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import com.google.common.base.Joiner;
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import com.google.common.base.Splitter;
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import com.google.common.base.Strings;
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import com.google.common.collect.Iterables;
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import com.google.common.io.BaseEncoding;
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import java.util.List;
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public class AsciiArmor {
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public static byte[] decode(final String input) {
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final List<String> lines = Splitter.on('\n').splitToList(Strings.nullToEmpty(input).trim());
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if (lines.size() == 1) {
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final String line = lines.get(0);
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if (line.length() > 1) {
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final int end = line.lastIndexOf('=');
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if (end >= 1) {
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final String cleaned = line.substring(0, end);
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return BaseEncoding.base64().decode(cleaned);
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}
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}
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}
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final String withoutChecksum;
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if (Iterables.getLast(lines).charAt(0) == '=') {
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withoutChecksum = Joiner.on("").join(lines.subList(0, lines.size() - 1));
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} else {
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withoutChecksum = Joiner.on("").join(lines);
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}
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return BaseEncoding.base64().decode(withoutChecksum);
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}
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}
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