kopia lustrzana https://github.com/weetmuts/wmbusmeters
42 wiersze
1.4 KiB
Java
42 wiersze
1.4 KiB
Java
//
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// A utility to extract the contents of an
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// XML containing an XML-Encrypted CipherValue.
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//
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// Compile with javac XMLExtract.java (requires jdk8 or above).
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//
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import javax.crypto.Cipher;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.util.Arrays;
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import java.util.Base64;
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import java.util.stream.Collectors;
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public class XMLExtract
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{
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static Cipher getCipherDecrypt(String password) throws Exception {
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byte[] key = Arrays.copyOf(password.getBytes("UTF-8"), 16);
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SecretKeySpec sks = new SecretKeySpec(key, "AES");
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IvParameterSpec ips = new IvParameterSpec(key);
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Cipher c = Cipher.getInstance("AES/CBC/NoPadding");
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c.init(Cipher.DECRYPT_MODE, sks, ips);
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return c;
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}
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public static void main(String args[]) throws Exception
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{
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if (args.length < 2) {
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System.out.println("java -cp . XMLExtract [password] [encrypted_xml_file] ");
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return;
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}
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Cipher c = getCipherDecrypt(args[0]);
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String xml = Files.lines(Paths.get(args[1])).collect(Collectors.joining(""));
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String b64 = xml.substring(xml.indexOf("<CipherValue>")+13, xml.indexOf("</CipherValue>"));
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byte[] raw = Base64.getDecoder().decode(b64);
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String plain = new String(c.doFinal(raw));
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System.out.println(plain);
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}
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}
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