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Code Issues Releases Wiki Activity

Implement decryption with - and access of session keys

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This commit is contained in:
Paul Schaub 2021-10-15 14:58:17 +02:00
parent 03f13ee4a7
commit c55fd2e552
12 changed files with 334 additions and 37 deletions
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15
sop-java/src/main/java/sop/SessionKey.java
View file

@ -5,11 +5,15 @@
package sop;
import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import sop.util.HexUtil;
public class SessionKey {
private static final Pattern PATTERN = Pattern.compile("^(\\d):([0-9a-fA-F]+)$");
private final byte algorithm;
private final byte[] sessionKey;
@ -57,6 +61,17 @@ public class SessionKey {
return getAlgorithm() == otherKey.getAlgorithm() && Arrays.equals(getKey(), otherKey.getKey());
}
public static SessionKey fromString(String string) {
Matcher matcher = PATTERN.matcher(string);
if (!matcher.matches()) {
throw new IllegalArgumentException("Provided session key does not match expected format.");
}
byte algorithm = Byte.parseByte(matcher.group(1));
String key = matcher.group(2);
return new SessionKey(algorithm, HexUtil.hexToBytes(key));
}
@Override
public String toString() {
return "" + (int) getAlgorithm() + ':' + HexUtil.bytesToHex(sessionKey);

7
sop-java/src/test/java/sop/util/SessionKeyTest.java
View file

@ -12,6 +12,13 @@ import sop.SessionKey;
public class SessionKeyTest {
@Test
public void fromStringTest() {
String string = "9:FCA4BEAF687F48059CACC14FB019125CD57392BAB7037C707835925CBF9F7BCD";
SessionKey sessionKey = SessionKey.fromString(string);
assertEquals(string, sessionKey.toString());
}
@Test
public void toStringTest() {
SessionKey sessionKey = new SessionKey((byte) 9, HexUtil.hexToBytes("FCA4BEAF687F48059CACC14FB019125CD57392BAB7037C707835925CBF9F7BCD"));