Java Code Examples for org.whispersystems.libsignal.ecc.Curve#calculateAgreement()

The following examples show how to use org.whispersystems.libsignal.ecc.Curve#calculateAgreement() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: ProvisioningCipher.java    From mollyim-android with GNU General Public License v3.0 6 votes vote down vote up 
public byte[] encrypt(ProvisionMessage message) throws InvalidKeyException {
  ECKeyPair ourKeyPair    = Curve.generateKeyPair();
  byte[]    sharedSecret  = Curve.calculateAgreement(theirPublicKey, ourKeyPair.getPrivateKey());
  byte[]    derivedSecret = new HKDFv3().deriveSecrets(sharedSecret, "TextSecure Provisioning Message".getBytes(), 64);
  byte[][]  parts         = Util.split(derivedSecret, 32, 32);

  byte[] version    = {0x01};
  byte[] ciphertext = getCiphertext(parts[0], message.toByteArray());
  byte[] mac        = getMac(parts[1], Util.join(version, ciphertext));
  byte[] body       = Util.join(version, ciphertext, mac);

  return ProvisionEnvelope.newBuilder()
                          .setPublicKey(ByteString.copyFrom(ourKeyPair.getPublicKey().serialize()))
                          .setBody(ByteString.copyFrom(body))
                          .build()
                          .toByteArray();
}
Example 2
Source File: AsymmetricMasterCipher.java    From mollyim-android with GNU General Public License v3.0 6 votes vote down vote up 
public byte[] encryptBytes(byte[] body) {
  try {
    ECPublicKey  theirPublic        = asymmetricMasterSecret.getDjbPublicKey();
    ECKeyPair    ourKeyPair         = Curve.generateKeyPair();
    byte[]       secret             = Curve.calculateAgreement(theirPublic, ourKeyPair.getPrivateKey());
    MasterCipher masterCipher       = getMasterCipherForSecret(secret);
    byte[]       encryptedBodyBytes = masterCipher.encrypt(body);

    PublicKey    ourPublicKey       = new PublicKey(31337, ourKeyPair.getPublicKey());
    byte[]       publicKeyBytes     = ourPublicKey.serialize();

    return Util.combine(publicKeyBytes, encryptedBodyBytes);
  } catch (InvalidKeyException e) {
    throw new AssertionError(e);
  }
}
Example 3
Source File: ProvisioningCipher.java    From bcm-android with GNU General Public License v3.0 6 votes vote down vote up 
public byte[] encrypt(ProvisionMessage message) throws InvalidKeyException {
  ECKeyPair ourKeyPair    = Curve.generateKeyPair();
  byte[]    sharedSecret  = Curve.calculateAgreement(theirPublicKey, ourKeyPair.getPrivateKey());
  byte[]    derivedSecret = new HKDFv3().deriveSecrets(sharedSecret, "TextSecure Provisioning Message".getBytes(), 64);
  byte[][]  parts         = Util.split(derivedSecret, 32, 32);

  byte[] version    = {0x01};
  byte[] ciphertext = getCiphertext(parts[0], message.toByteArray());
  byte[] mac        = getMac(parts[1], Util.join(version, ciphertext));
  byte[] body       = Util.join(version, ciphertext, mac);

  return ProvisionEnvelope.newBuilder()
                          .setPublicKey(ByteString.copyFrom(ourKeyPair.getPublicKey().serialize()))
                          .setBody(ByteString.copyFrom(body))
                          .build()
                          .toByteArray();
}
Example 4
Source File: AsymmetricMasterCipher.java    From bcm-android with GNU General Public License v3.0 6 votes vote down vote up 
public byte[] encryptBytes(byte[] body) {
  try {
    ECPublicKey  theirPublic        = asymmetricMasterSecret.getDjbPublicKey();
    ECKeyPair    ourKeyPair         = Curve.generateKeyPair();
    byte[]       secret             = Curve.calculateAgreement(theirPublic, ourKeyPair.getPrivateKey());
    MasterCipher masterCipher       = getMasterCipherForSecret(secret);
    byte[]       encryptedBodyBytes = masterCipher.encryptBytes(body);

    PublicKey    ourPublicKey       = new PublicKey(31337, ourKeyPair.getPublicKey());
    byte[]       publicKeyBytes     = ourPublicKey.serialize();

    return Util.combine(publicKeyBytes, encryptedBodyBytes);
  } catch (InvalidKeyException e) {
    throw new AssertionError(e);
  }
}
Example 5
Source File: ProvisioningCipher.java    From libsignal-service-java with GNU General Public License v3.0 6 votes vote down vote up 
public byte[] encrypt(ProvisionMessage message) throws InvalidKeyException {
  ECKeyPair ourKeyPair    = Curve.generateKeyPair();
  byte[]    sharedSecret  = Curve.calculateAgreement(theirPublicKey, ourKeyPair.getPrivateKey());
  byte[]    derivedSecret = new HKDFv3().deriveSecrets(sharedSecret, "TextSecure Provisioning Message".getBytes(), 64);
  byte[][]  parts         = Util.split(derivedSecret, 32, 32);

  byte[] version    = {0x01};
  byte[] ciphertext = getCiphertext(parts[0], message.toByteArray());
  byte[] mac        = getMac(parts[1], Util.join(version, ciphertext));
  byte[] body       = Util.join(version, ciphertext, mac);

  return ProvisionEnvelope.newBuilder()
                          .setPublicKey(ByteString.copyFrom(ourKeyPair.getPublicKey().serialize()))
                          .setBody(ByteString.copyFrom(body))
                          .build()
                          .toByteArray();
}
Example 6
Source File: AsymmetricMasterCipher.java    From Silence with GNU General Public License v3.0 6 votes vote down vote up 
public String decryptBody(String body) throws IOException, InvalidMessageException {
  try {
    byte[]    combined       = Base64.decode(body);
    byte[][]  parts          = Util.split(combined, PublicKey.KEY_SIZE, combined.length - PublicKey.KEY_SIZE);
    PublicKey theirPublicKey = new PublicKey(parts[0], 0);

    ECPrivateKey ourPrivateKey = asymmetricMasterSecret.getPrivateKey();
    byte[]       secret        = Curve.calculateAgreement(theirPublicKey.getKey(), ourPrivateKey);
    MasterCipher masterCipher  = getMasterCipherForSecret(secret);
    byte[]       decryptedBody = masterCipher.decryptBytes(parts[1]);

    return new String(decryptedBody);
  } catch (InvalidKeyException | InvalidMessageException ike) {
    throw new InvalidMessageException(ike);
  }
}
Example 7
Source File: AsymmetricMasterCipher.java    From Silence with GNU General Public License v3.0 6 votes vote down vote up 
public String encryptBody(String body) {
  try {
    ECPublicKey  theirPublic        = asymmetricMasterSecret.getDjbPublicKey();
    ECKeyPair    ourKeyPair         = Curve.generateKeyPair();
    byte[]       secret             = Curve.calculateAgreement(theirPublic, ourKeyPair.getPrivateKey());
    MasterCipher masterCipher       = getMasterCipherForSecret(secret);
    byte[]       encryptedBodyBytes = masterCipher.encryptBytes(body.getBytes());

    PublicKey    ourPublicKey       = new PublicKey(31337, ourKeyPair.getPublicKey());
    byte[]       publicKeyBytes     = ourPublicKey.serialize();
    byte[]       combined           = Util.combine(publicKeyBytes, encryptedBodyBytes);

    return Base64.encodeBytes(combined);
  } catch (InvalidKeyException e) {
    throw new AssertionError(e);
  }
}
Example 8
Source File: AsymmetricMasterCipher.java    From mollyim-android with GNU General Public License v3.0 5 votes vote down vote up 
public byte[] decryptBytes(byte[] combined) throws IOException, InvalidMessageException {
  try {
    byte[][]  parts          = Util.split(combined, PublicKey.KEY_SIZE, combined.length - PublicKey.KEY_SIZE);
    PublicKey theirPublicKey = new PublicKey(parts[0], 0);

    ECPrivateKey ourPrivateKey = asymmetricMasterSecret.getPrivateKey();
    byte[]       secret        = Curve.calculateAgreement(theirPublicKey.getKey(), ourPrivateKey);
    MasterCipher masterCipher  = getMasterCipherForSecret(secret);

    return masterCipher.decrypt(parts[1]);
  } catch (InvalidKeyException | GeneralSecurityException e) {
    throw new InvalidMessageException(e);
  }
}
Example 9
Source File: AsymmetricMasterCipher.java    From bcm-android with GNU General Public License v3.0 5 votes vote down vote up 
public byte[] decryptBytes(byte[] combined) throws IOException, InvalidMessageException {
  try {
    byte[][]  parts          = Util.split(combined, PublicKey.KEY_SIZE, combined.length - PublicKey.KEY_SIZE);
    PublicKey theirPublicKey = new PublicKey(parts[0], 0);

    ECPrivateKey ourPrivateKey = asymmetricMasterSecret.getPrivateKey();
    byte[]       secret        = Curve.calculateAgreement(theirPublicKey.getKey(), ourPrivateKey);
    MasterCipher masterCipher  = getMasterCipherForSecret(secret);

    return masterCipher.decryptBytes(parts[1]);
  } catch (InvalidKeyException e) {
    throw new InvalidMessageException(e);
  }
}
Example 10
Source File: RootKey.java    From libsignal-protocol-java with GNU General Public License v3.0 5 votes vote down vote up 
public Pair<RootKey, ChainKey> createChain(ECPublicKey theirRatchetKey, ECKeyPair ourRatchetKey)
    throws InvalidKeyException
{
  byte[]             sharedSecret       = Curve.calculateAgreement(theirRatchetKey, ourRatchetKey.getPrivateKey());
  byte[]             derivedSecretBytes = kdf.deriveSecrets(sharedSecret, key, "WhisperRatchet".getBytes(), DerivedRootSecrets.SIZE);
  DerivedRootSecrets derivedSecrets     = new DerivedRootSecrets(derivedSecretBytes);

  RootKey  newRootKey  = new RootKey(kdf, derivedSecrets.getRootKey());
  ChainKey newChainKey = new ChainKey(kdf, derivedSecrets.getChainKey(), 0);

  return new Pair<>(newRootKey, newChainKey);
}