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Merge branch 'message-encrypter' into 'master'

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Refactor MessageEncrypter main method

See merge request akwizgran/briar!800
This commit is contained in:
akwizgran
2018-05-17 08:22:22 +00:00
parent ed2c0336ed 0f7d27cd95
commit c2214f5e61
1 changed files with 64 additions and 36 deletions
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100
bramble-core/src/main/java/org/briarproject/bramble/crypto/MessageEncrypter.java
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@@ -152,59 +152,47 @@ public class MessageEncrypter {
} }
} }
public static void main(String[] args) throws Exception { public static void main(String[] args) {
if (args.length < 1) { if (args.length < 1) {
printUsage(); printUsage();
return; System.exit(1);
} }
SecureRandom random = new SecureRandom();
MessageEncrypter encrypter = new MessageEncrypter(random);
if (args[0].equals("generate")) { if (args[0].equals("generate")) {
if (args.length != 3) { if (args.length != 3) {
printUsage(); printUsage();
return; System.exit(1);
}
try {
generateKeyPair(args[1], args[2]);
} catch (Exception e) {
e.printStackTrace();
System.exit(2);
} }
// Generate a key pair
KeyPair keyPair = encrypter.generateKeyPair();
PrintStream out = new PrintStream(new FileOutputStream(args[1]));
out.print(
StringUtils.toHexString(keyPair.getPublic().getEncoded()));
out.flush();
out.close();
out = new PrintStream(new FileOutputStream(args[2]));
out.print(
StringUtils.toHexString(keyPair.getPrivate().getEncoded()));
out.flush();
out.close();
} else if (args[0].equals("encrypt")) { } else if (args[0].equals("encrypt")) {
if (args.length != 2) { if (args.length != 2) {
printUsage(); printUsage();
return; System.exit(1);
}
try {
encryptMessage(args[1]);
} catch (Exception e) {
e.printStackTrace();
System.exit(2);
} }
// Encrypt a decrypted message
InputStream in = new FileInputStream(args[1]);
byte[] keyBytes = StringUtils.fromHexString(readFully(in).trim());
PublicKey publicKey =
encrypter.getKeyParser().parsePublicKey(keyBytes);
String message = readFully(System.in);
byte[] plaintext = message.getBytes(Charset.forName("UTF-8"));
byte[] ciphertext = encrypter.encrypt(publicKey, plaintext);
System.out.println(AsciiArmour.wrap(ciphertext, LINE_LENGTH));
} else if (args[0].equals("decrypt")) { } else if (args[0].equals("decrypt")) {
if (args.length != 2) { if (args.length != 2) {
printUsage(); printUsage();
return; System.exit(1);
}
try {
decryptMessage(args[1]);
} catch (Exception e) {
e.printStackTrace();
System.exit(2);
} }
// Decrypt an encrypted message
InputStream in = new FileInputStream(args[1]);
byte[] keyBytes = StringUtils.fromHexString(readFully(in).trim());
PrivateKey privateKey =
encrypter.getKeyParser().parsePrivateKey(keyBytes);
byte[] ciphertext = AsciiArmour.unwrap(readFully(System.in));
byte[] plaintext = encrypter.decrypt(privateKey, ciphertext);
System.out.println(new String(plaintext, Charset.forName("UTF-8")));
} else { } else {
printUsage(); printUsage();
System.exit(1);
} }
} }
@@ -216,6 +204,46 @@ public class MessageEncrypter {
System.err.println("MessageEncrypter decrypt <private_key_file>"); System.err.println("MessageEncrypter decrypt <private_key_file>");
} }
private static void generateKeyPair(String publicKeyFile,
String privateKeyFile) throws Exception {
SecureRandom random = new SecureRandom();
MessageEncrypter encrypter = new MessageEncrypter(random);
KeyPair keyPair = encrypter.generateKeyPair();
PrintStream out = new PrintStream(new FileOutputStream(publicKeyFile));
out.print(StringUtils.toHexString(keyPair.getPublic().getEncoded()));
out.flush();
out.close();
out = new PrintStream(new FileOutputStream(privateKeyFile));
out.print(StringUtils.toHexString(keyPair.getPrivate().getEncoded()));
out.flush();
out.close();
}
private static void encryptMessage(String publicKeyFile) throws Exception {
SecureRandom random = new SecureRandom();
MessageEncrypter encrypter = new MessageEncrypter(random);
InputStream in = new FileInputStream(publicKeyFile);
byte[] keyBytes = StringUtils.fromHexString(readFully(in).trim());
PublicKey publicKey =
encrypter.getKeyParser().parsePublicKey(keyBytes);
String message = readFully(System.in);
byte[] plaintext = message.getBytes(Charset.forName("UTF-8"));
byte[] ciphertext = encrypter.encrypt(publicKey, plaintext);
System.out.println(AsciiArmour.wrap(ciphertext, LINE_LENGTH));
}
private static void decryptMessage(String privateKeyFile) throws Exception {
SecureRandom random = new SecureRandom();
MessageEncrypter encrypter = new MessageEncrypter(random);
InputStream in = new FileInputStream(privateKeyFile);
byte[] keyBytes = StringUtils.fromHexString(readFully(in).trim());
PrivateKey privateKey =
encrypter.getKeyParser().parsePrivateKey(keyBytes);
byte[] ciphertext = AsciiArmour.unwrap(readFully(System.in));
byte[] plaintext = encrypter.decrypt(privateKey, ciphertext);
System.out.println(new String(plaintext, Charset.forName("UTF-8")));
}
private static String readFully(InputStream in) throws IOException { private static String readFully(InputStream in) throws IOException {
String newline = System.getProperty("line.separator"); String newline = System.getProperty("line.separator");
StringBuilder stringBuilder = new StringBuilder(); StringBuilder stringBuilder = new StringBuilder();