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com.pusher.rest.crypto.nacl.TweetNaclFast Maven / Gradle / Ivy
package com.pusher.rest.crypto.nacl;
// Copyright (c) 2014-present Tom Zhou
// https://github.com/InstantWebP2P/tweetnacl-java
// Latest commit on this file 13db332c861d49b82f44d9cc31319fb2a21ad1c3
// Repo head f19b9e2ccebeb1401060e13a38b907809837f9a4
import java.io.UnsupportedEncodingException;
import java.security.SecureRandom;
import java.lang.System;
import java.util.concurrent.atomic.AtomicLong;
/*
* @description
* TweetNacl.c Java porting
* */
final class TweetNaclFast {
private final static String TAG = "TweetNaclFast";
/*
* @description
* Box algorithm, Public-key authenticated encryption
* */
public static final class Box {
private final static String TAG = "Box";
private AtomicLong nonce;
private byte [] theirPublicKey;
private byte [] mySecretKey;
private byte [] sharedKey;
public Box(byte [] theirPublicKey, byte [] mySecretKey) {
this(theirPublicKey, mySecretKey, 68);
}
public Box(byte [] theirPublicKey, byte [] mySecretKey, long nonce) {
this.theirPublicKey = theirPublicKey;
this.mySecretKey = mySecretKey;
this.nonce = new AtomicLong(nonce);
// generate pre-computed shared key
before();
}
public void setNonce(long nonce) {
this.nonce.set(nonce);
}
public long getNonce() {
return this.nonce.get();
}
public long incrNonce() {
return this.nonce.incrementAndGet();
}
private byte[] generateNonce() {
// generate nonce
long nonce = this.nonce.get();
byte [] n = new byte[nonceLength];
for (int i = 0; i < nonceLength; i += 8) {
n[i+0] = (byte) (nonce>>> 0);
n[i+1] = (byte) (nonce>>> 8);
n[i+2] = (byte) (nonce>>>16);
n[i+3] = (byte) (nonce>>>24);
n[i+4] = (byte) (nonce>>>32);
n[i+5] = (byte) (nonce>>>40);
n[i+6] = (byte) (nonce>>>48);
n[i+7] = (byte) (nonce>>>56);
}
return n;
}
/*
* @description
* Encrypt and authenticates message using peer's public key,
* our secret key, and the given nonce, which must be unique
* for each distinct message for a key pair.
*
* Returns an encrypted and authenticated message,
* which is nacl.box.overheadLength longer than the original message.
* */
public byte [] box(byte [] message) {
if (message==null) return null;
return box(message, 0, message.length);
}
public byte [] box(byte [] message, final int moff) {
if (!(message!=null && message.length>moff)) return null;
return box(message, moff, message.length-moff);
}
public byte [] box(byte [] message, final int moff, final int mlen) {
if (!(message!=null && message.length>=(moff+mlen))) return null;
// prepare shared key
if (this.sharedKey == null) before();
return after(message, moff, mlen);
}
/*
* @description
* Encrypt and authenticates message using peer's public key,
* our secret key, and the given nonce, which must be unique
* for each distinct message for a key pair.
*
* Explicitly pass the nonce
*
* Returns an encrypted and authenticated message,
* which is nacl.box.overheadLength longer than the original message.
* */
public byte [] box(byte [] message, byte [] theNonce) {
if (message==null) return null;
return box(message, 0, message.length, theNonce);
}
public byte [] box(byte [] message, final int moff, byte [] theNonce) {
if (!(message!=null && message.length>moff)) return null;
return box(message, moff, message.length-moff, theNonce);
}
public byte [] box(byte [] message, final int moff, final int mlen, byte [] theNonce) {
if (!(message!=null && message.length>=(moff+mlen) &&
theNonce!=null && theNonce.length==nonceLength))
return null;
// prepare shared key
if (this.sharedKey == null) before();
return after(message, moff, mlen, theNonce);
}
/*
* @description
* Authenticates and decrypts the given box with peer's public key,
* our secret key, and the given nonce.
*
* Returns the original message, or null if authentication fails.
* */
public byte [] open(byte [] box) {
if (box==null) return null;
// prepare shared key
if (this.sharedKey == null) before();
return open_after(box, 0, box.length);
}
public byte [] open(byte [] box, final int boxoff) {
if (!(box!=null && box.length>boxoff)) return null;
// prepare shared key
if (this.sharedKey == null) before();
return open_after(box, boxoff, box.length-boxoff);
}
public byte [] open(byte [] box, final int boxoff, final int boxlen) {
if (!(box!=null && box.length>=(boxoff+boxlen))) return null;
// prepare shared key
if (this.sharedKey == null) before();
return open_after(box, boxoff, boxlen);
}
/*
* @description
* Authenticates and decrypts the given box with peer's public key,
* our secret key, and the given nonce.
* Explicit passing of nonce
* Returns the original message, or null if authentication fails.
* */
public byte [] open(byte [] box, byte [] theNonce) {
if (!(box!=null &&
theNonce!=null && theNonce.length==nonceLength))
return null;
// prepare shared key
if (this.sharedKey == null) before();
return open_after(box, 0, box.length, theNonce);
}
public byte [] open(byte [] box, final int boxoff, byte [] theNonce) {
if (!(box!=null && box.length>boxoff &&
theNonce!=null && theNonce.length==nonceLength))
return null;
// prepare shared key
if (this.sharedKey == null) before();
return open_after(box, boxoff, box.length-boxoff, theNonce);
}
public byte [] open(byte [] box, final int boxoff, final int boxlen, byte [] theNonce) {
if (!(box!=null && box.length>=(boxoff+boxlen) &&
theNonce!=null && theNonce.length==nonceLength))
return null;
// prepare shared key
if (this.sharedKey == null) before();
return open_after(box, boxoff, boxlen, theNonce);
}
/*
* @description
* Returns a precomputed shared key
* which can be used in nacl.box.after and nacl.box.open.after.
* */
public byte [] before() {
if (this.sharedKey == null) {
this.sharedKey = new byte[sharedKeyLength];
crypto_box_beforenm(this.sharedKey, this.theirPublicKey, this.mySecretKey);
}
return this.sharedKey;
}
/*
* @description
* Same as nacl.box, but uses a shared key precomputed with nacl.box.before.
* */
public byte [] after(byte [] message, final int moff, final int mlen) {
return after(message, moff, mlen, generateNonce());
}
/*
* @description
* Same as nacl.box, but uses a shared key precomputed with nacl.box.before,
* and passes a nonce explicitly.
* */
public byte [] after(byte [] message, final int moff, final int mlen, byte [] theNonce) {
// check message
if (!(message!=null && message.length>=(moff+mlen) &&
theNonce!=null && theNonce.length==nonceLength))
return null;
// message buffer
byte [] m = new byte[mlen + zerobytesLength];
// cipher buffer
byte [] c = new byte[m.length];
for (int i = 0; i < mlen; i ++)
m[i+zerobytesLength] = message[i+moff];
if (0 != crypto_box_afternm(c, m, m.length, theNonce, sharedKey))
return null;
// wrap byte_buf_t on c offset@boxzerobytesLength
///return new byte_buf_t(c, boxzerobytesLength, c.length-boxzerobytesLength);
byte [] ret = new byte[c.length-boxzerobytesLength];
for (int i = 0; i < ret.length; i ++)
ret[i] = c[i+boxzerobytesLength];
return ret;
}
/*
* @description
* Same as nacl.box.open,
* but uses a shared key pre-computed with nacl.box.before.
* */
public byte [] open_after(byte [] box, final int boxoff, final int boxlen) {
return open_after(box, boxoff, boxlen, generateNonce());
}
public byte [] open_after(byte [] box, final int boxoff, final int boxlen, byte [] theNonce) {
// check message
if (!(box!=null && box.length>=(boxoff+boxlen) && boxlen>=boxzerobytesLength))
return null;
// cipher buffer
byte [] c = new byte[boxlen + boxzerobytesLength];
// message buffer
byte [] m = new byte[c.length];
for (int i = 0; i < boxlen; i++)
c[i+boxzerobytesLength] = box[i+boxoff];
if (crypto_box_open_afternm(m, c, c.length, theNonce, sharedKey) != 0)
return null;
// wrap byte_buf_t on m offset@zerobytesLength
///return new byte_buf_t(m, zerobytesLength, m.length-zerobytesLength);
byte [] ret = new byte[m.length-zerobytesLength];
for (int i = 0; i < ret.length; i ++)
ret[i] = m[i+zerobytesLength];
return ret;
}
/*
* @description
* Length of public key in bytes.
* */
public static final int publicKeyLength = 32;
/*
* @description
* Length of secret key in bytes.
* */
public static final int secretKeyLength = 32;
/*
* @description
* Length of precomputed shared key in bytes.
* */
public static final int sharedKeyLength = 32;
/*
* @description
* Length of nonce in bytes.
* */
public static final int nonceLength = 24;
/*
* @description
* zero bytes in case box
* */
public static final int zerobytesLength = 32;
/*
* @description
* zero bytes in case open box
* */
public static final int boxzerobytesLength = 16;
/*
* @description
* Length of overhead added to box compared to original message.
* */
public static final int overheadLength = 16;
public static class KeyPair {
private byte [] publicKey;
private byte [] secretKey;
public KeyPair() {
publicKey = new byte[publicKeyLength];
secretKey = new byte[secretKeyLength];
}
public byte [] getPublicKey() {
return publicKey;
}
public byte [] getSecretKey() {
return secretKey;
}
}
/*
* @description
* Generates a new random key pair for box and
* returns it as an object with publicKey and secretKey members:
* */
public static KeyPair keyPair() {
KeyPair kp = new KeyPair();
crypto_box_keypair(kp.getPublicKey(), kp.getSecretKey());
return kp;
}
public static KeyPair keyPair_fromSecretKey(byte [] secretKey) {
KeyPair kp = new KeyPair();
byte [] sk = kp.getSecretKey();
byte [] pk = kp.getPublicKey();
// copy sk
for (int i = 0; i < sk.length; i ++)
sk[i] = secretKey[i];
crypto_scalarmult_base(pk, sk);
return kp;
}
}
/*
* @description
* Secret Box algorithm, secret key
* */
public static final class SecretBox {
private final static String TAG = "SecretBox";
private AtomicLong nonce;
private byte [] key;
public SecretBox(byte [] key) {
this(key, 68);
}
public SecretBox(byte [] key, long nonce) {
this.key = key;
this.nonce = new AtomicLong(nonce);
}
public void setNonce(long nonce) {
this.nonce.set(nonce);
}
public long getNonce() {
return this.nonce.get();
}
public long incrNonce() {
return this.nonce.incrementAndGet();
}
private byte[] generateNonce() {
// generate nonce
long nonce = this.nonce.get();
byte [] n = new byte[nonceLength];
for (int i = 0; i < nonceLength; i += 8) {
n[i+0] = (byte) (nonce>>> 0);
n[i+1] = (byte) (nonce>>> 8);
n[i+2] = (byte) (nonce>>>16);
n[i+3] = (byte) (nonce>>>24);
n[i+4] = (byte) (nonce>>>32);
n[i+5] = (byte) (nonce>>>40);
n[i+6] = (byte) (nonce>>>48);
n[i+7] = (byte) (nonce>>>56);
}
return n;
}
/*
* @description
* Encrypt and authenticates message using the key and the nonce.
* The nonce must be unique for each distinct message for this key.
*
* Returns an encrypted and authenticated message,
* which is nacl.secretbox.overheadLength longer than the original message.
* */
public byte [] box(byte [] message) {
if (message==null) return null;
return box(message, 0, message.length);
}
public byte [] box(byte [] message, final int moff) {
if (!(message!=null && message.length>moff)) return null;
return box(message, moff, message.length-moff);
}
public byte [] box(byte [] message, final int moff, final int mlen) {
// check message
if (!(message!=null && message.length>=(moff+mlen)))
return null;
return box(message, moff, message.length-moff, generateNonce());
}
public byte [] box(byte [] message, byte [] theNonce) {
if (message==null) return null;
return box(message, 0, message.length, theNonce);
}
public byte [] box(byte [] message, final int moff, byte [] theNonce) {
if (!(message!=null && message.length>moff)) return null;
return box(message, moff, message.length-moff, theNonce);
}
public byte [] box(byte [] message, final int moff, final int mlen, byte [] theNonce) {
// check message
if (!(message!=null && message.length>=(moff+mlen) &&
theNonce!=null && theNonce.length==nonceLength))
return null;
// message buffer
byte [] m = new byte[mlen + zerobytesLength];
// cipher buffer
byte [] c = new byte[m.length];
for (int i = 0; i < mlen; i ++)
m[i+zerobytesLength] = message[i+moff];
if (0 != crypto_secretbox(c, m, m.length, theNonce, key))
return null;
// TBD optimizing ...
// wrap byte_buf_t on c offset@boxzerobytesLength
///return new byte_buf_t(c, boxzerobytesLength, c.length-boxzerobytesLength);
byte [] ret = new byte[c.length-boxzerobytesLength];
for (int i = 0; i < ret.length; i ++)
ret[i] = c[i+boxzerobytesLength];
return ret;
}
/*
* @description
* Authenticates and decrypts the given secret box
* using the key and the nonce.
*
* Returns the original message, or null if authentication fails.
* */
public byte [] open(byte [] box) {
if (box==null) return null;
return open(box, 0, box.length);
}
public byte [] open(byte [] box, final int boxoff) {
if (!(box!=null && box.length>boxoff)) return null;
return open(box, boxoff, box.length-boxoff);
}
public byte [] open(byte [] box, final int boxoff, final int boxlen) {
// check message
if (!(box!=null && box.length>=(boxoff+boxlen) && boxlen>=boxzerobytesLength))
return null;
return open(box, boxoff, box.length-boxoff, generateNonce());
}
public byte [] open(byte [] box, byte [] theNonce) {
if (box==null) return null;
return open(box, 0, box.length, theNonce);
}
public byte [] open(byte [] box, final int boxoff, byte [] theNonce) {
if (!(box!=null && box.length>boxoff)) return null;
return open(box, boxoff, box.length-boxoff, theNonce);
}
public byte [] open(byte [] box, final int boxoff, final int boxlen, byte [] theNonce) {
// check message
if (!(box!=null && box.length>=(boxoff+boxlen) && boxlen>=boxzerobytesLength &&
theNonce!=null && theNonce.length==nonceLength))
return null;
// cipher buffer
byte [] c = new byte[boxlen + boxzerobytesLength];
// message buffer
byte [] m = new byte[c.length];
for (int i = 0; i < boxlen; i++)
c[i+boxzerobytesLength] = box[i+boxoff];
if (0 != crypto_secretbox_open(m, c, c.length, theNonce, key))
return null;
// wrap byte_buf_t on m offset@zerobytesLength
///return new byte_buf_t(m, zerobytesLength, m.length-zerobytesLength);
byte [] ret = new byte[m.length-zerobytesLength];
for (int i = 0; i < ret.length; i ++)
ret[i] = m[i+zerobytesLength];
return ret;
}
/*
* @description
* Length of key in bytes.
* */
public static final int keyLength = 32;
/*
* @description
* Length of nonce in bytes.
* */
public static final int nonceLength = 24;
/*
* @description
* Length of overhead added to secret box compared to original message.
* */
public static final int overheadLength = 16;
/*
* @description
* zero bytes in case box
* */
public static final int zerobytesLength = 32;
/*
* @description
* zero bytes in case open box
* */
public static final int boxzerobytesLength = 16;
}
/*
* @description
* Scalar multiplication, Implements curve25519.
* */
public static final class ScalarMult {
private final static String TAG = "ScalarMult";
/*
* @description
* Multiplies an integer n by a group element p and
* returns the resulting group element.
* */
public static byte [] scalseMult(byte [] n, byte [] p) {
if (!(n.length==scalarLength && p.length==groupElementLength))
return null;
byte [] q = new byte [scalarLength];
crypto_scalarmult(q, n, p);
return q;
}
/*
* @description
* Multiplies an integer n by a standard group element and
* returns the resulting group element.
* */
public static byte [] scalseMult_base(byte [] n) {
if (!(n.length==scalarLength))
return null;
byte [] q = new byte [scalarLength];
crypto_scalarmult_base(q, n);
return q;
}
/*
* @description
* Length of scalar in bytes.
* */
public static final int scalarLength = 32;
/*
* @description
* Length of group element in bytes.
* */
public static final int groupElementLength = 32;
}
/*
* @description
* Hash algorithm, Implements SHA-512.
* */
public static final class Hash {
private final static String TAG = "Hash";
/*
* @description
* Returns SHA-512 hash of the message.
* */
public static byte[] sha512(byte [] message) {
if (!(message!=null && message.length>0))
return null;
byte [] out = new byte[hashLength];
crypto_hash(out, message);
return out;
}
public static byte[] sha512(String message) throws UnsupportedEncodingException {
return sha512(message.getBytes("utf-8"));
}
/*
* @description
* Length of hash in bytes.
* */
public static final int hashLength = 64;
}
/*
* @description
* Signature algorithm, Implements ed25519.
* */
public static final class Signature {
private final static String TAG = "Signature";
private byte [] theirPublicKey;
private byte [] mySecretKey;
public Signature(byte [] theirPublicKey, byte [] mySecretKey) {
this.theirPublicKey = theirPublicKey;
this.mySecretKey = mySecretKey;
}
/*
* @description
* Signs the message using the secret key and returns a signed message.
* */
public byte [] sign(byte [] message) {
if (message==null) return null;
return sign(message, 0, message.length);
}
public byte [] sign(byte [] message, final int moff) {
if (!(message!=null && message.length>moff)) return null;
return sign(message, moff, message.length-moff);
}
public byte [] sign(byte [] message, final int moff, final int mlen) {
// check message
if (!(message!=null && message.length>=(moff+mlen)))
return null;
// signed message
byte [] sm = new byte[mlen + signatureLength];
crypto_sign(sm, -1, message, moff, mlen, mySecretKey);
return sm;
}
/*
* @description
* Verifies the signed message and returns the message without signature.
* Returns null if verification failed.
* */
public byte [] open(byte [] signedMessage) {
if (signedMessage==null) return null;
return open(signedMessage, 0, signedMessage.length);
}
public byte [] open(byte [] signedMessage, final int smoff) {
if (!(signedMessage!=null && signedMessage.length>smoff)) return null;
return open(signedMessage, smoff, signedMessage.length-smoff);
}
public byte [] open(byte [] signedMessage, final int smoff, final int smlen) {
// check sm length
if (!(signedMessage!=null && signedMessage.length>=(smoff+smlen) && smlen>=signatureLength))
return null;
// temp buffer
byte [] tmp = new byte[smlen];
if (0 != crypto_sign_open(tmp, -1, signedMessage, smoff, smlen, theirPublicKey))
return null;
// message
byte [] msg = new byte[smlen-signatureLength];
for (int i = 0; i < msg.length; i ++)
msg[i] = signedMessage[smoff+ i+signatureLength];
return msg;
}
/*
* @description
* Signs the message using the secret key and returns a signature.
* */
public byte [] detached(byte [] message) {
byte[] signedMsg = this.sign(message);
byte[] sig = new byte[signatureLength];
for (int i = 0; i < sig.length; i++)
sig[i] = signedMsg[i];
return sig;
}
/*
* @description
* Verifies the signature for the message and
* returns true if verification succeeded or false if it failed.
* */
public boolean detached_verify(byte [] message, byte [] signature) {
if (signature.length != signatureLength)
return false;
if (theirPublicKey.length != publicKeyLength)
return false;
byte [] sm = new byte[signatureLength + message.length];
byte [] m = new byte[signatureLength + message.length];
for (int i = 0; i < signatureLength; i++)
sm[i] = signature[i];
for (int i = 0; i < message.length; i++)
sm[i + signatureLength] = message[i];
return (crypto_sign_open(m, -1, sm, 0, sm.length, theirPublicKey) >= 0);
}
/*
* @description
* Generates new random key pair for signing and
* returns it as an object with publicKey and secretKey members
* */
public static class KeyPair {
private byte [] publicKey;
private byte [] secretKey;
public KeyPair() {
publicKey = new byte[publicKeyLength];
secretKey = new byte[secretKeyLength];
}
public byte [] getPublicKey() {
return publicKey;
}
public byte [] getSecretKey() {
return secretKey;
}
}
/*
* @description
* Signs the message using the secret key and returns a signed message.
* */
public static KeyPair keyPair() {
KeyPair kp = new KeyPair();
crypto_sign_keypair(kp.getPublicKey(), kp.getSecretKey(), false);
return kp;
}
public static KeyPair keyPair_fromSecretKey(byte [] secretKey) {
KeyPair kp = new KeyPair();
byte [] pk = kp.getPublicKey();
byte [] sk = kp.getSecretKey();
// copy sk
for (int i = 0; i < kp.getSecretKey().length; i ++)
sk[i] = secretKey[i];
// copy pk from sk
for (int i = 0; i < kp.getPublicKey().length; i ++)
pk[i] = secretKey[32+i]; // hard-copy
return kp;
}
public static KeyPair keyPair_fromSeed(byte [] seed) {
KeyPair kp = new KeyPair();
byte [] pk = kp.getPublicKey();
byte [] sk = kp.getSecretKey();
// copy sk
for (int i = 0; i < seedLength; i ++)
sk[i] = seed[i];
// generate pk from sk
crypto_sign_keypair(pk, sk, true);
return kp;
}
/*
* @description
* Length of signing public key in bytes.
* */
public static final int publicKeyLength = 32;
/*
* @description
* Length of signing secret key in bytes.
* */
public static final int secretKeyLength = 64;
/*
* @description
* Length of seed for nacl.sign.keyPair.fromSeed in bytes.
* */
public static final int seedLength = 32;
/*
* @description
* Length of signature in bytes.
* */
public static final int signatureLength = 64;
}
////////////////////////////////////////////////////////////////////////////////////
/*
* @description
* Codes below are ported tweetnacl-fast.js from TweetNacl.c/TweetNacl.h
* */
private static final byte [] _0 = new byte[16];
private static final byte [] _9 = new byte[32];
static {
///for (int i = 0; i < _0.length; i ++) _0[i] = 0;
///for (int i = 0; i < _9.length; i ++) _9[i] = 0;
_9[0] = 9;
}
private static final long [] gf0 = new long[16];
private static final long [] gf1 = new long[16];
private static final long [] _121665 = new long[16];
static {
///for (int i = 0; i < gf0.length; i ++) gf0[i] = 0;
///for (int i = 0; i < gf1.length; i ++) gf1[i] = 0;
gf1[0] = 1;
///for (int i = 0; i < _121665.length; i ++) _121665[i] = 0;
_121665[0] = 0xDB41; _121665[1] = 1;
}
private static final long [] D = new long [] {
0x78a3, 0x1359, 0x4dca, 0x75eb,
0xd8ab, 0x4141, 0x0a4d, 0x0070,
0xe898, 0x7779, 0x4079, 0x8cc7,
0xfe73, 0x2b6f, 0x6cee, 0x5203
};
private static final long [] D2 = new long [] {
0xf159, 0x26b2, 0x9b94, 0xebd6,
0xb156, 0x8283, 0x149a, 0x00e0,
0xd130, 0xeef3, 0x80f2, 0x198e,
0xfce7, 0x56df, 0xd9dc, 0x2406
};
private static final long [] X = new long [] {
0xd51a, 0x8f25, 0x2d60, 0xc956,
0xa7b2, 0x9525, 0xc760, 0x692c,
0xdc5c, 0xfdd6, 0xe231, 0xc0a4,
0x53fe, 0xcd6e, 0x36d3, 0x2169
};
private static final long [] Y = new long [] {
0x6658, 0x6666, 0x6666, 0x6666,
0x6666, 0x6666, 0x6666, 0x6666,
0x6666, 0x6666, 0x6666, 0x6666,
0x6666, 0x6666, 0x6666, 0x6666
};
private static final long [] I = new long [] {
0xa0b0, 0x4a0e, 0x1b27, 0xc4ee,
0xe478, 0xad2f, 0x1806, 0x2f43,
0xd7a7, 0x3dfb, 0x0099, 0x2b4d,
0xdf0b, 0x4fc1, 0x2480, 0x2b83
};
private static void ts64(byte [] x, final int xoff, long u)
{
///int i;
///for (i = 7;i >= 0;--i) { x[i+xoff] = (byte)(u&0xff); u >>>= 8; }
x[7+xoff] = (byte)(u&0xff); u >>>= 8;
x[6+xoff] = (byte)(u&0xff); u >>>= 8;
x[5+xoff] = (byte)(u&0xff); u >>>= 8;
x[4+xoff] = (byte)(u&0xff); u >>>= 8;
x[3+xoff] = (byte)(u&0xff); u >>>= 8;
x[2+xoff] = (byte)(u&0xff); u >>>= 8;
x[1+xoff] = (byte)(u&0xff); u >>>= 8;
x[0+xoff] = (byte)(u&0xff); ///u >>>= 8;
}
private static int vn(
byte [] x, final int xoff,
byte [] y, final int yoff,
int n)
{
int i,d = 0;
for (i = 0; i < n; i ++) d |= (x[i+xoff]^y[i+yoff]) & 0xff;
return (1 & ((d - 1) >>> 8)) - 1;
}
private static int crypto_verify_16(
byte [] x, final int xoff,
byte [] y, final int yoff)
{
return vn(x,xoff,y,yoff,16);
}
public static int crypto_verify_16(byte [] x, byte [] y)
{
return crypto_verify_16(x,0, y,0);
}
private static int crypto_verify_32(
byte [] x, final int xoff,
byte [] y, final int yoff)
{
return vn(x,xoff,y,yoff,32);
}
public static int crypto_verify_32(byte [] x, byte [] y)
{
return crypto_verify_32(x,0, y,0);
}
private static void core_salsa20(byte [] o, byte [] p, byte [] k, byte [] c) {
int j0 = c[ 0] & 0xff | (c[ 1] & 0xff)<<8 | (c[ 2] & 0xff)<<16 | (c[ 3] & 0xff)<<24,
j1 = k[ 0] & 0xff | (k[ 1] & 0xff)<<8 | (k[ 2] & 0xff)<<16 | (k[ 3] & 0xff)<<24,
j2 = k[ 4] & 0xff | (k[ 5] & 0xff)<<8 | (k[ 6] & 0xff)<<16 | (k[ 7] & 0xff)<<24,
j3 = k[ 8] & 0xff | (k[ 9] & 0xff)<<8 | (k[10] & 0xff)<<16 | (k[11] & 0xff)<<24,
j4 = k[12] & 0xff | (k[13] & 0xff)<<8 | (k[14] & 0xff)<<16 | (k[15] & 0xff)<<24,
j5 = c[ 4] & 0xff | (c[ 5] & 0xff)<<8 | (c[ 6] & 0xff)<<16 | (c[ 7] & 0xff)<<24,
j6 = p[ 0] & 0xff | (p[ 1] & 0xff)<<8 | (p[ 2] & 0xff)<<16 | (p[ 3] & 0xff)<<24,
j7 = p[ 4] & 0xff | (p[ 5] & 0xff)<<8 | (p[ 6] & 0xff)<<16 | (p[ 7] & 0xff)<<24,
j8 = p[ 8] & 0xff | (p[ 9] & 0xff)<<8 | (p[10] & 0xff)<<16 | (p[11] & 0xff)<<24,
j9 = p[12] & 0xff | (p[13] & 0xff)<<8 | (p[14] & 0xff)<<16 | (p[15] & 0xff)<<24,
j10 = c[ 8] & 0xff | (c[ 9] & 0xff)<<8 | (c[10] & 0xff)<<16 | (c[11] & 0xff)<<24,
j11 = k[16] & 0xff | (k[17] & 0xff)<<8 | (k[18] & 0xff)<<16 | (k[19] & 0xff)<<24,
j12 = k[20] & 0xff | (k[21] & 0xff)<<8 | (k[22] & 0xff)<<16 | (k[23] & 0xff)<<24,
j13 = k[24] & 0xff | (k[25] & 0xff)<<8 | (k[26] & 0xff)<<16 | (k[27] & 0xff)<<24,
j14 = k[28] & 0xff | (k[29] & 0xff)<<8 | (k[30] & 0xff)<<16 | (k[31] & 0xff)<<24,
j15 = c[12] & 0xff | (c[13] & 0xff)<<8 | (c[14] & 0xff)<<16 | (c[15] & 0xff)<<24;
int x0 = j0, x1 = j1, x2 = j2, x3 = j3, x4 = j4, x5 = j5, x6 = j6, x7 = j7,
x8 = j8, x9 = j9, x10 = j10, x11 = j11, x12 = j12, x13 = j13, x14 = j14,
x15 = j15, u;
for (int i = 0; i < 20; i += 2) {
u = x0 + x12 | 0;
x4 ^= u<<7 | u>>>(32-7);
u = x4 + x0 | 0;
x8 ^= u<<9 | u>>>(32-9);
u = x8 + x4 | 0;
x12 ^= u<<13 | u>>>(32-13);
u = x12 + x8 | 0;
x0 ^= u<<18 | u>>>(32-18);
u = x5 + x1 | 0;
x9 ^= u<<7 | u>>>(32-7);
u = x9 + x5 | 0;
x13 ^= u<<9 | u>>>(32-9);
u = x13 + x9 | 0;
x1 ^= u<<13 | u>>>(32-13);
u = x1 + x13 | 0;
x5 ^= u<<18 | u>>>(32-18);
u = x10 + x6 | 0;
x14 ^= u<<7 | u>>>(32-7);
u = x14 + x10 | 0;
x2 ^= u<<9 | u>>>(32-9);
u = x2 + x14 | 0;
x6 ^= u<<13 | u>>>(32-13);
u = x6 + x2 | 0;
x10 ^= u<<18 | u>>>(32-18);
u = x15 + x11 | 0;
x3 ^= u<<7 | u>>>(32-7);
u = x3 + x15 | 0;
x7 ^= u<<9 | u>>>(32-9);
u = x7 + x3 | 0;
x11 ^= u<<13 | u>>>(32-13);
u = x11 + x7 | 0;
x15 ^= u<<18 | u>>>(32-18);
u = x0 + x3 | 0;
x1 ^= u<<7 | u>>>(32-7);
u = x1 + x0 | 0;
x2 ^= u<<9 | u>>>(32-9);
u = x2 + x1 | 0;
x3 ^= u<<13 | u>>>(32-13);
u = x3 + x2 | 0;
x0 ^= u<<18 | u>>>(32-18);
u = x5 + x4 | 0;
x6 ^= u<<7 | u>>>(32-7);
u = x6 + x5 | 0;
x7 ^= u<<9 | u>>>(32-9);
u = x7 + x6 | 0;
x4 ^= u<<13 | u>>>(32-13);
u = x4 + x7 | 0;
x5 ^= u<<18 | u>>>(32-18);
u = x10 + x9 | 0;
x11 ^= u<<7 | u>>>(32-7);
u = x11 + x10 | 0;
x8 ^= u<<9 | u>>>(32-9);
u = x8 + x11 | 0;
x9 ^= u<<13 | u>>>(32-13);
u = x9 + x8 | 0;
x10 ^= u<<18 | u>>>(32-18);
u = x15 + x14 | 0;
x12 ^= u<<7 | u>>>(32-7);
u = x12 + x15 | 0;
x13 ^= u<<9 | u>>>(32-9);
u = x13 + x12 | 0;
x14 ^= u<<13 | u>>>(32-13);
u = x14 + x13 | 0;
x15 ^= u<<18 | u>>>(32-18);
}
x0 = x0 + j0 | 0;
x1 = x1 + j1 | 0;
x2 = x2 + j2 | 0;
x3 = x3 + j3 | 0;
x4 = x4 + j4 | 0;
x5 = x5 + j5 | 0;
x6 = x6 + j6 | 0;
x7 = x7 + j7 | 0;
x8 = x8 + j8 | 0;
x9 = x9 + j9 | 0;
x10 = x10 + j10 | 0;
x11 = x11 + j11 | 0;
x12 = x12 + j12 | 0;
x13 = x13 + j13 | 0;
x14 = x14 + j14 | 0;
x15 = x15 + j15 | 0;
o[ 0] = (byte) (x0 >>> 0 & 0xff);
o[ 1] = (byte) (x0 >>> 8 & 0xff);
o[ 2] = (byte) (x0 >>> 16 & 0xff);
o[ 3] = (byte) (x0 >>> 24 & 0xff);
o[ 4] = (byte) (x1 >>> 0 & 0xff);
o[ 5] = (byte) (x1 >>> 8 & 0xff);
o[ 6] = (byte) (x1 >>> 16 & 0xff);
o[ 7] = (byte) (x1 >>> 24 & 0xff);
o[ 8] = (byte) (x2 >>> 0 & 0xff);
o[ 9] = (byte) (x2 >>> 8 & 0xff);
o[10] = (byte) (x2 >>> 16 & 0xff);
o[11] = (byte) (x2 >>> 24 & 0xff);
o[12] = (byte) (x3 >>> 0 & 0xff);
o[13] = (byte) (x3 >>> 8 & 0xff);
o[14] = (byte) (x3 >>> 16 & 0xff);
o[15] = (byte) (x3 >>> 24 & 0xff);
o[16] = (byte) (x4 >>> 0 & 0xff);
o[17] = (byte) (x4 >>> 8 & 0xff);
o[18] = (byte) (x4 >>> 16 & 0xff);
o[19] = (byte) (x4 >>> 24 & 0xff);
o[20] = (byte) (x5 >>> 0 & 0xff);
o[21] = (byte) (x5 >>> 8 & 0xff);
o[22] = (byte) (x5 >>> 16 & 0xff);
o[23] = (byte) (x5 >>> 24 & 0xff);
o[24] = (byte) (x6 >>> 0 & 0xff);
o[25] = (byte) (x6 >>> 8 & 0xff);
o[26] = (byte) (x6 >>> 16 & 0xff);
o[27] = (byte) (x6 >>> 24 & 0xff);
o[28] = (byte) (x7 >>> 0 & 0xff);
o[29] = (byte) (x7 >>> 8 & 0xff);
o[30] = (byte) (x7 >>> 16 & 0xff);
o[31] = (byte) (x7 >>> 24 & 0xff);
o[32] = (byte) (x8 >>> 0 & 0xff);
o[33] = (byte) (x8 >>> 8 & 0xff);
o[34] = (byte) (x8 >>> 16 & 0xff);
o[35] = (byte) (x8 >>> 24 & 0xff);
o[36] = (byte) (x9 >>> 0 & 0xff);
o[37] = (byte) (x9 >>> 8 & 0xff);
o[38] = (byte) (x9 >>> 16 & 0xff);
o[39] = (byte) (x9 >>> 24 & 0xff);
o[40] = (byte) (x10 >>> 0 & 0xff);
o[41] = (byte) (x10 >>> 8 & 0xff);
o[42] = (byte) (x10 >>> 16 & 0xff);
o[43] = (byte) (x10 >>> 24 & 0xff);
o[44] = (byte) (x11 >>> 0 & 0xff);
o[45] = (byte) (x11 >>> 8 & 0xff);
o[46] = (byte) (x11 >>> 16 & 0xff);
o[47] = (byte) (x11 >>> 24 & 0xff);
o[48] = (byte) (x12 >>> 0 & 0xff);
o[49] = (byte) (x12 >>> 8 & 0xff);
o[50] = (byte) (x12 >>> 16 & 0xff);
o[51] = (byte) (x12 >>> 24 & 0xff);
o[52] = (byte) (x13 >>> 0 & 0xff);
o[53] = (byte) (x13 >>> 8 & 0xff);
o[54] = (byte) (x13 >>> 16 & 0xff);
o[55] = (byte) (x13 >>> 24 & 0xff);
o[56] = (byte) (x14 >>> 0 & 0xff);
o[57] = (byte) (x14 >>> 8 & 0xff);
o[58] = (byte) (x14 >>> 16 & 0xff);
o[59] = (byte) (x14 >>> 24 & 0xff);
o[60] = (byte) (x15 >>> 0 & 0xff);
o[61] = (byte) (x15 >>> 8 & 0xff);
o[62] = (byte) (x15 >>> 16 & 0xff);
o[63] = (byte) (x15 >>> 24 & 0xff);
/*String dbgt = "";
for (int dbg = 0; dbg < o.length; dbg ++) dbgt += " "+o[dbg];
Log.d(TAG, "core_salsa20 -> "+dbgt);
*/
}
private static void core_hsalsa20(byte [] o, byte [] p, byte [] k, byte [] c) {
int j0 = c[ 0] & 0xff | (c[ 1] & 0xff)<<8 | (c[ 2] & 0xff)<<16 | (c[ 3] & 0xff)<<24,
j1 = k[ 0] & 0xff | (k[ 1] & 0xff)<<8 | (k[ 2] & 0xff)<<16 | (k[ 3] & 0xff)<<24,
j2 = k[ 4] & 0xff | (k[ 5] & 0xff)<<8 | (k[ 6] & 0xff)<<16 | (k[ 7] & 0xff)<<24,
j3 = k[ 8] & 0xff | (k[ 9] & 0xff)<<8 | (k[10] & 0xff)<<16 | (k[11] & 0xff)<<24,
j4 = k[12] & 0xff | (k[13] & 0xff)<<8 | (k[14] & 0xff)<<16 | (k[15] & 0xff)<<24,
j5 = c[ 4] & 0xff | (c[ 5] & 0xff)<<8 | (c[ 6] & 0xff)<<16 | (c[ 7] & 0xff)<<24,
j6 = p[ 0] & 0xff | (p[ 1] & 0xff)<<8 | (p[ 2] & 0xff)<<16 | (p[ 3] & 0xff)<<24,
j7 = p[ 4] & 0xff | (p[ 5] & 0xff)<<8 | (p[ 6] & 0xff)<<16 | (p[ 7] & 0xff)<<24,
j8 = p[ 8] & 0xff | (p[ 9] & 0xff)<<8 | (p[10] & 0xff)<<16 | (p[11] & 0xff)<<24,
j9 = p[12] & 0xff | (p[13] & 0xff)<<8 | (p[14] & 0xff)<<16 | (p[15] & 0xff)<<24,
j10 = c[ 8] & 0xff | (c[ 9] & 0xff)<<8 | (c[10] & 0xff)<<16 | (c[11] & 0xff)<<24,
j11 = k[16] & 0xff | (k[17] & 0xff)<<8 | (k[18] & 0xff)<<16 | (k[19] & 0xff)<<24,
j12 = k[20] & 0xff | (k[21] & 0xff)<<8 | (k[22] & 0xff)<<16 | (k[23] & 0xff)<<24,
j13 = k[24] & 0xff | (k[25] & 0xff)<<8 | (k[26] & 0xff)<<16 | (k[27] & 0xff)<<24,
j14 = k[28] & 0xff | (k[29] & 0xff)<<8 | (k[30] & 0xff)<<16 | (k[31] & 0xff)<<24,
j15 = c[12] & 0xff | (c[13] & 0xff)<<8 | (c[14] & 0xff)<<16 | (c[15] & 0xff)<<24;
int x0 = j0, x1 = j1, x2 = j2, x3 = j3, x4 = j4, x5 = j5, x6 = j6, x7 = j7,
x8 = j8, x9 = j9, x10 = j10, x11 = j11, x12 = j12, x13 = j13, x14 = j14,
x15 = j15, u;
for (int i = 0; i < 20; i += 2) {
u = x0 + x12 | 0;
x4 ^= u<<7 | u>>>(32-7);
u = x4 + x0 | 0;
x8 ^= u<<9 | u>>>(32-9);
u = x8 + x4 | 0;
x12 ^= u<<13 | u>>>(32-13);
u = x12 + x8 | 0;
x0 ^= u<<18 | u>>>(32-18);
u = x5 + x1 | 0;
x9 ^= u<<7 | u>>>(32-7);
u = x9 + x5 | 0;
x13 ^= u<<9 | u>>>(32-9);
u = x13 + x9 | 0;
x1 ^= u<<13 | u>>>(32-13);
u = x1 + x13 | 0;
x5 ^= u<<18 | u>>>(32-18);
u = x10 + x6 | 0;
x14 ^= u<<7 | u>>>(32-7);
u = x14 + x10 | 0;
x2 ^= u<<9 | u>>>(32-9);
u = x2 + x14 | 0;
x6 ^= u<<13 | u>>>(32-13);
u = x6 + x2 | 0;
x10 ^= u<<18 | u>>>(32-18);
u = x15 + x11 | 0;
x3 ^= u<<7 | u>>>(32-7);
u = x3 + x15 | 0;
x7 ^= u<<9 | u>>>(32-9);
u = x7 + x3 | 0;
x11 ^= u<<13 | u>>>(32-13);
u = x11 + x7 | 0;
x15 ^= u<<18 | u>>>(32-18);
u = x0 + x3 | 0;
x1 ^= u<<7 | u>>>(32-7);
u = x1 + x0 | 0;
x2 ^= u<<9 | u>>>(32-9);
u = x2 + x1 | 0;
x3 ^= u<<13 | u>>>(32-13);
u = x3 + x2 | 0;
x0 ^= u<<18 | u>>>(32-18);
u = x5 + x4 | 0;
x6 ^= u<<7 | u>>>(32-7);
u = x6 + x5 | 0;
x7 ^= u<<9 | u>>>(32-9);
u = x7 + x6 | 0;
x4 ^= u<<13 | u>>>(32-13);
u = x4 + x7 | 0;
x5 ^= u<<18 | u>>>(32-18);
u = x10 + x9 | 0;
x11 ^= u<<7 | u>>>(32-7);
u = x11 + x10 | 0;
x8 ^= u<<9 | u>>>(32-9);
u = x8 + x11 | 0;
x9 ^= u<<13 | u>>>(32-13);
u = x9 + x8 | 0;
x10 ^= u<<18 | u>>>(32-18);
u = x15 + x14 | 0;
x12 ^= u<<7 | u>>>(32-7);
u = x12 + x15 | 0;
x13 ^= u<<9 | u>>>(32-9);
u = x13 + x12 | 0;
x14 ^= u<<13 | u>>>(32-13);
u = x14 + x13 | 0;
x15 ^= u<<18 | u>>>(32-18);
}
o[ 0] = (byte) (x0 >>> 0 & 0xff);
o[ 1] = (byte) (x0 >>> 8 & 0xff);
o[ 2] = (byte) (x0 >>> 16 & 0xff);
o[ 3] = (byte) (x0 >>> 24 & 0xff);
o[ 4] = (byte) (x5 >>> 0 & 0xff);
o[ 5] = (byte) (x5 >>> 8 & 0xff);
o[ 6] = (byte) (x5 >>> 16 & 0xff);
o[ 7] = (byte) (x5 >>> 24 & 0xff);
o[ 8] = (byte) (x10 >>> 0 & 0xff);
o[ 9] = (byte) (x10 >>> 8 & 0xff);
o[10] = (byte) (x10 >>> 16 & 0xff);
o[11] = (byte) (x10 >>> 24 & 0xff);
o[12] = (byte) (x15 >>> 0 & 0xff);
o[13] = (byte) (x15 >>> 8 & 0xff);
o[14] = (byte) (x15 >>> 16 & 0xff);
o[15] = (byte) (x15 >>> 24 & 0xff);
o[16] = (byte) (x6 >>> 0 & 0xff);
o[17] = (byte) (x6 >>> 8 & 0xff);
o[18] = (byte) (x6 >>> 16 & 0xff);
o[19] = (byte) (x6 >>> 24 & 0xff);
o[20] = (byte) (x7 >>> 0 & 0xff);
o[21] = (byte) (x7 >>> 8 & 0xff);
o[22] = (byte) (x7 >>> 16 & 0xff);
o[23] = (byte) (x7 >>> 24 & 0xff);
o[24] = (byte) (x8 >>> 0 & 0xff);
o[25] = (byte) (x8 >>> 8 & 0xff);
o[26] = (byte) (x8 >>> 16 & 0xff);
o[27] = (byte) (x8 >>> 24 & 0xff);
o[28] = (byte) (x9 >>> 0 & 0xff);
o[29] = (byte) (x9 >>> 8 & 0xff);
o[30] = (byte) (x9 >>> 16 & 0xff);
o[31] = (byte) (x9 >>> 24 & 0xff);
/*String dbgt = "";
for (int dbg = 0; dbg < o.length; dbg ++) dbgt += " "+o[dbg];
Log.d(TAG, "core_hsalsa20 -> "+dbgt);
*/
}
public static int crypto_core_salsa20(byte [] out, byte [] in, byte [] k, byte [] c)
{
///core(out,in,k,c,0);
core_salsa20(out,in,k,c);
///String dbgt = "";
///for (int dbg = 0; dbg < out.length; dbg ++) dbgt += " "+out[dbg];
///L/og.d(TAG, "crypto_core_salsa20 -> "+dbgt);
return 0;
}
public static int crypto_core_hsalsa20(byte [] out, byte [] in, byte [] k, byte [] c)
{
///core(out,in,k,c,1);
core_hsalsa20(out,in,k,c);
///String dbgt = "";
///for (int dbg = 0; dbg < out.length; dbg ++) dbgt += " "+out[dbg];
///L/og.d(TAG, "crypto_core_hsalsa20 -> "+dbgt);
return 0;
}
// "expand 32-byte k"
private static final byte[] sigma = {101, 120, 112, 97, 110, 100, 32, 51, 50, 45, 98, 121, 116, 101, 32, 107};
/*static {
try {
sigma = "expand 32-byte k".getBytes("utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}*/
private static int crypto_stream_salsa20_xor(byte [] c,int cpos, byte [] m,int mpos, long b, byte [] n, byte [] k)
{
byte [] z = new byte[16], x = new byte[64];
int u, i;
for (i = 0; i < 16; i++) z[i] = 0;
for (i = 0; i < 8; i++) z[i] = n[i];
while (b >= 64) {
crypto_core_salsa20(x,z,k,sigma);
for (i = 0; i < 64; i++) c[cpos+i] = (byte) ((m[mpos+i] ^ x[i]) & 0xff);
u = 1;
for (i = 8; i < 16; i++) {
u = u + (z[i] & 0xff) | 0;
z[i] = (byte) (u & 0xff);
u >>>= 8;
}
b -= 64;
cpos += 64;
mpos += 64;
}
if (b > 0) {
crypto_core_salsa20(x,z,k,sigma);
for (i = 0; i < b; i++) c[cpos+i] = (byte) ((m[mpos+i] ^ x[i]) & 0xff);
}
///String dbgt = "";
///for (int dbg = 0; dbg < c.length-cpos; dbg ++) dbgt += " "+c[dbg +cpos];
///Log.d(TAG, "crypto_stream_salsa20_xor, c -> "+dbgt);
return 0;
}
public static int crypto_stream_salsa20(byte [] c,int cpos, long b, byte [] n, byte [] k) {
byte [] z = new byte[16], x = new byte[64];
int u, i;
for (i = 0; i < 16; i++) z[i] = 0;
for (i = 0; i < 8; i++) z[i] = n[i];
while (b >= 64) {
crypto_core_salsa20(x,z,k,sigma);
for (i = 0; i < 64; i++) c[cpos+i] = x[i];
u = 1;
for (i = 8; i < 16; i++) {
u = u + (z[i] & 0xff) | 0;
z[i] = (byte) (u & 0xff);
u >>>= 8;
}
b -= 64;
cpos += 64;
}
if (b > 0) {
crypto_core_salsa20(x,z,k,sigma);
for (i = 0; i < b; i++) c[cpos+i] = x[i];
}
///String dbgt = "";
///for (int dbg = 0; dbg < c.length-cpos; dbg ++) dbgt += " "+c[dbg +cpos];
///Log.d(TAG, "crypto_stream_salsa20, c -> "+dbgt);
return 0;
}
public static int crypto_stream(byte [] c,int cpos, long d, byte [] n, byte [] k) {
byte [] s = new byte[32];
crypto_core_hsalsa20(s,n,k,sigma);
byte [] sn = new byte[8];
for (int i = 0; i < 8; i++) sn[i] = n[i+16];
return crypto_stream_salsa20(c,cpos,d,sn,s);
}
public static int crypto_stream_xor(byte [] c,int cpos, byte [] m,int mpos, long d, byte [] n, byte [] k) {
byte [] s = new byte[32];
/*String dbgt = "";
for (int dbg = 0; dbg < n.length; dbg ++) dbgt += " "+n[dbg];
Log.d(TAG, "crypto_stream_xor, nonce -> "+dbgt);
dbgt = "";
for (int dbg = 0; dbg < k.length; dbg ++) dbgt += " "+k[dbg];
Log.d(TAG, "crypto_stream_xor, shk -> "+dbgt);
*/
crypto_core_hsalsa20(s,n,k,sigma);
byte [] sn = new byte[8];
for (int i = 0; i < 8; i++) sn[i] = n[i+16];
return crypto_stream_salsa20_xor(c,cpos,m,mpos,d,sn,s);
}
/*
* Port of Andrew Moon's Poly1305-donna-16. Public domain.
* https://github.com/floodyberry/poly1305-donna
*/
public static final class poly1305 {
private byte[] buffer;
private int[] r;
private int[] h;
private int[] pad;
private int leftover;
private int fin;
public poly1305(byte [] key) {
this.buffer = new byte[16];
this.r = new int[10];
this.h = new int[10];
this.pad = new int[8];
this.leftover = 0;
this.fin = 0;
int t0, t1, t2, t3, t4, t5, t6, t7;
t0 = key[ 0] & 0xff | (key[ 1] & 0xff) << 8; this.r[0] = ( t0 ) & 0x1fff;
t1 = key[ 2] & 0xff | (key[ 3] & 0xff) << 8; this.r[1] = ((t0 >>> 13) | (t1 << 3)) & 0x1fff;
t2 = key[ 4] & 0xff | (key[ 5] & 0xff) << 8; this.r[2] = ((t1 >>> 10) | (t2 << 6)) & 0x1f03;
t3 = key[ 6] & 0xff | (key[ 7] & 0xff) << 8; this.r[3] = ((t2 >>> 7) | (t3 << 9)) & 0x1fff;
t4 = key[ 8] & 0xff | (key[ 9] & 0xff) << 8; this.r[4] = ((t3 >>> 4) | (t4 << 12)) & 0x00ff;
this.r[5] = ((t4 >>> 1)) & 0x1ffe;
t5 = key[10] & 0xff | (key[11] & 0xff) << 8; this.r[6] = ((t4 >>> 14) | (t5 << 2)) & 0x1fff;
t6 = key[12] & 0xff | (key[13] & 0xff) << 8; this.r[7] = ((t5 >>> 11) | (t6 << 5)) & 0x1f81;
t7 = key[14] & 0xff | (key[15] & 0xff) << 8; this.r[8] = ((t6 >>> 8) | (t7 << 8)) & 0x1fff;
this.r[9] = ((t7 >>> 5)) & 0x007f;
this.pad[0] = key[16] & 0xff | (key[17] & 0xff) << 8;
this.pad[1] = key[18] & 0xff | (key[19] & 0xff) << 8;
this.pad[2] = key[20] & 0xff | (key[21] & 0xff) << 8;
this.pad[3] = key[22] & 0xff | (key[23] & 0xff) << 8;
this.pad[4] = key[24] & 0xff | (key[25] & 0xff) << 8;
this.pad[5] = key[26] & 0xff | (key[27] & 0xff) << 8;
this.pad[6] = key[28] & 0xff | (key[29] & 0xff) << 8;
this.pad[7] = key[30] & 0xff | (key[31] & 0xff) << 8;
}
public poly1305 blocks(byte [] m, int mpos, int bytes) {
int hibit = this.fin!=0 ? 0 : (1 << 11);
int t0, t1, t2, t3, t4, t5, t6, t7, c;
int d0, d1, d2, d3, d4, d5, d6, d7, d8, d9;
int h0 = this.h[0],
h1 = this.h[1],
h2 = this.h[2],
h3 = this.h[3],
h4 = this.h[4],
h5 = this.h[5],
h6 = this.h[6],
h7 = this.h[7],
h8 = this.h[8],
h9 = this.h[9];
int r0 = this.r[0],
r1 = this.r[1],
r2 = this.r[2],
r3 = this.r[3],
r4 = this.r[4],
r5 = this.r[5],
r6 = this.r[6],
r7 = this.r[7],
r8 = this.r[8],
r9 = this.r[9];
while (bytes >= 16) {
t0 = m[mpos+ 0] & 0xff | (m[mpos+ 1] & 0xff) << 8; h0 += ( t0 ) & 0x1fff;
t1 = m[mpos+ 2] & 0xff | (m[mpos+ 3] & 0xff) << 8; h1 += ((t0 >>> 13) | (t1 << 3)) & 0x1fff;
t2 = m[mpos+ 4] & 0xff | (m[mpos+ 5] & 0xff) << 8; h2 += ((t1 >>> 10) | (t2 << 6)) & 0x1fff;
t3 = m[mpos+ 6] & 0xff | (m[mpos+ 7] & 0xff) << 8; h3 += ((t2 >>> 7) | (t3 << 9)) & 0x1fff;
t4 = m[mpos+ 8] & 0xff | (m[mpos+ 9] & 0xff) << 8; h4 += ((t3 >>> 4) | (t4 << 12)) & 0x1fff;
h5 += ((t4 >>> 1)) & 0x1fff;
t5 = m[mpos+10] & 0xff | (m[mpos+11] & 0xff) << 8; h6 += ((t4 >>> 14) | (t5 << 2)) & 0x1fff;
t6 = m[mpos+12] & 0xff | (m[mpos+13] & 0xff) << 8; h7 += ((t5 >>> 11) | (t6 << 5)) & 0x1fff;
t7 = m[mpos+14] & 0xff | (m[mpos+15] & 0xff) << 8; h8 += ((t6 >>> 8) | (t7 << 8)) & 0x1fff;
h9 += ((t7 >>> 5)) | hibit;
c = 0;
d0 = c;
d0 += h0 * r0;
d0 += h1 * (5 * r9);
d0 += h2 * (5 * r8);
d0 += h3 * (5 * r7);
d0 += h4 * (5 * r6);
c = (d0 >>> 13); d0 &= 0x1fff;
d0 += h5 * (5 * r5);
d0 += h6 * (5 * r4);
d0 += h7 * (5 * r3);
d0 += h8 * (5 * r2);
d0 += h9 * (5 * r1);
c += (d0 >>> 13); d0 &= 0x1fff;
d1 = c;
d1 += h0 * r1;
d1 += h1 * r0;
d1 += h2 * (5 * r9);
d1 += h3 * (5 * r8);
d1 += h4 * (5 * r7);
c = (d1 >>> 13); d1 &= 0x1fff;
d1 += h5 * (5 * r6);
d1 += h6 * (5 * r5);
d1 += h7 * (5 * r4);
d1 += h8 * (5 * r3);
d1 += h9 * (5 * r2);
c += (d1 >>> 13); d1 &= 0x1fff;
d2 = c;
d2 += h0 * r2;
d2 += h1 * r1;
d2 += h2 * r0;
d2 += h3 * (5 * r9);
d2 += h4 * (5 * r8);
c = (d2 >>> 13); d2 &= 0x1fff;
d2 += h5 * (5 * r7);
d2 += h6 * (5 * r6);
d2 += h7 * (5 * r5);
d2 += h8 * (5 * r4);
d2 += h9 * (5 * r3);
c += (d2 >>> 13); d2 &= 0x1fff;
d3 = c;
d3 += h0 * r3;
d3 += h1 * r2;
d3 += h2 * r1;
d3 += h3 * r0;
d3 += h4 * (5 * r9);
c = (d3 >>> 13); d3 &= 0x1fff;
d3 += h5 * (5 * r8);
d3 += h6 * (5 * r7);
d3 += h7 * (5 * r6);
d3 += h8 * (5 * r5);
d3 += h9 * (5 * r4);
c += (d3 >>> 13); d3 &= 0x1fff;
d4 = c;
d4 += h0 * r4;
d4 += h1 * r3;
d4 += h2 * r2;
d4 += h3 * r1;
d4 += h4 * r0;
c = (d4 >>> 13); d4 &= 0x1fff;
d4 += h5 * (5 * r9);
d4 += h6 * (5 * r8);
d4 += h7 * (5 * r7);
d4 += h8 * (5 * r6);
d4 += h9 * (5 * r5);
c += (d4 >>> 13); d4 &= 0x1fff;
d5 = c;
d5 += h0 * r5;
d5 += h1 * r4;
d5 += h2 * r3;
d5 += h3 * r2;
d5 += h4 * r1;
c = (d5 >>> 13); d5 &= 0x1fff;
d5 += h5 * r0;
d5 += h6 * (5 * r9);
d5 += h7 * (5 * r8);
d5 += h8 * (5 * r7);
d5 += h9 * (5 * r6);
c += (d5 >>> 13); d5 &= 0x1fff;
d6 = c;
d6 += h0 * r6;
d6 += h1 * r5;
d6 += h2 * r4;
d6 += h3 * r3;
d6 += h4 * r2;
c = (d6 >>> 13); d6 &= 0x1fff;
d6 += h5 * r1;
d6 += h6 * r0;
d6 += h7 * (5 * r9);
d6 += h8 * (5 * r8);
d6 += h9 * (5 * r7);
c += (d6 >>> 13); d6 &= 0x1fff;
d7 = c;
d7 += h0 * r7;
d7 += h1 * r6;
d7 += h2 * r5;
d7 += h3 * r4;
d7 += h4 * r3;
c = (d7 >>> 13); d7 &= 0x1fff;
d7 += h5 * r2;
d7 += h6 * r1;
d7 += h7 * r0;
d7 += h8 * (5 * r9);
d7 += h9 * (5 * r8);
c += (d7 >>> 13); d7 &= 0x1fff;
d8 = c;
d8 += h0 * r8;
d8 += h1 * r7;
d8 += h2 * r6;
d8 += h3 * r5;
d8 += h4 * r4;
c = (d8 >>> 13); d8 &= 0x1fff;
d8 += h5 * r3;
d8 += h6 * r2;
d8 += h7 * r1;
d8 += h8 * r0;
d8 += h9 * (5 * r9);
c += (d8 >>> 13); d8 &= 0x1fff;
d9 = c;
d9 += h0 * r9;
d9 += h1 * r8;
d9 += h2 * r7;
d9 += h3 * r6;
d9 += h4 * r5;
c = (d9 >>> 13); d9 &= 0x1fff;
d9 += h5 * r4;
d9 += h6 * r3;
d9 += h7 * r2;
d9 += h8 * r1;
d9 += h9 * r0;
c += (d9 >>> 13); d9 &= 0x1fff;
c = (((c << 2) + c)) | 0;
c = (c + d0) | 0;
d0 = c & 0x1fff;
c = (c >>> 13);
d1 += c;
h0 = d0;
h1 = d1;
h2 = d2;
h3 = d3;
h4 = d4;
h5 = d5;
h6 = d6;
h7 = d7;
h8 = d8;
h9 = d9;
mpos += 16;
bytes -= 16;
}
this.h[0] = h0;
this.h[1] = h1;
this.h[2] = h2;
this.h[3] = h3;
this.h[4] = h4;
this.h[5] = h5;
this.h[6] = h6;
this.h[7] = h7;
this.h[8] = h8;
this.h[9] = h9;
return this;
}
public poly1305 finish(byte [] mac, int macpos) {
int [] g = new int[10];
int c, mask, f, i;
if (this.leftover != 0) {
i = this.leftover;
this.buffer[i++] = 1;
for (; i < 16; i++) this.buffer[i] = 0;
this.fin = 1;
this.blocks(this.buffer, 0, 16);
}
c = this.h[1] >>> 13;
this.h[1] &= 0x1fff;
for (i = 2; i < 10; i++) {
this.h[i] += c;
c = this.h[i] >>> 13;
this.h[i] &= 0x1fff;
}
this.h[0] += (c * 5);
c = this.h[0] >>> 13;
this.h[0] &= 0x1fff;
this.h[1] += c;
c = this.h[1] >>> 13;
this.h[1] &= 0x1fff;
this.h[2] += c;
g[0] = this.h[0] + 5;
c = g[0] >>> 13;
g[0] &= 0x1fff;
for (i = 1; i < 10; i++) {
g[i] = this.h[i] + c;
c = g[i] >>> 13;
g[i] &= 0x1fff;
}
g[9] -= (1 << 13); g[9] &= 0xffff;
/*
backport from tweetnacl-fast.js https://github.com/dchest/tweetnacl-js/releases/tag/v0.14.3
<<<
"The issue was not properly detecting if st->h was >= 2^130 - 5,
coupled with [testing mistake] not catching the failure.
The chance of the bug affecting anything in the real world is essentially zero luckily,
but it's good to have it fixed."
>>>
*/
///change mask = (g[9] >>> ((2 * 8) - 1)) - 1; to as
mask = (c ^ 1) - 1;
mask &= 0xffff;
///////////////////////////////////////
for (i = 0; i < 10; i++) g[i] &= mask;
mask = ~mask;
for (i = 0; i < 10; i++) this.h[i] = (this.h[i] & mask) | g[i];
this.h[0] = ((this.h[0] ) | (this.h[1] << 13) ) & 0xffff;
this.h[1] = ((this.h[1] >>> 3) | (this.h[2] << 10) ) & 0xffff;
this.h[2] = ((this.h[2] >>> 6) | (this.h[3] << 7) ) & 0xffff;
this.h[3] = ((this.h[3] >>> 9) | (this.h[4] << 4) ) & 0xffff;
this.h[4] = ((this.h[4] >>> 12) | (this.h[5] << 1) | (this.h[6] << 14)) & 0xffff;
this.h[5] = ((this.h[6] >>> 2) | (this.h[7] << 11) ) & 0xffff;
this.h[6] = ((this.h[7] >>> 5) | (this.h[8] << 8) ) & 0xffff;
this.h[7] = ((this.h[8] >>> 8) | (this.h[9] << 5) ) & 0xffff;
f = this.h[0] + this.pad[0];
this.h[0] = f & 0xffff;
for (i = 1; i < 8; i++) {
f = (((this.h[i] + this.pad[i]) | 0) + (f >>> 16)) | 0;
this.h[i] = f & 0xffff;
}
mac[macpos+ 0] = (byte) ((this.h[0] >>> 0) & 0xff);
mac[macpos+ 1] = (byte) ((this.h[0] >>> 8) & 0xff);
mac[macpos+ 2] = (byte) ((this.h[1] >>> 0) & 0xff);
mac[macpos+ 3] = (byte) ((this.h[1] >>> 8) & 0xff);
mac[macpos+ 4] = (byte) ((this.h[2] >>> 0) & 0xff);
mac[macpos+ 5] = (byte) ((this.h[2] >>> 8) & 0xff);
mac[macpos+ 6] = (byte) ((this.h[3] >>> 0) & 0xff);
mac[macpos+ 7] = (byte) ((this.h[3] >>> 8) & 0xff);
mac[macpos+ 8] = (byte) ((this.h[4] >>> 0) & 0xff);
mac[macpos+ 9] = (byte) ((this.h[4] >>> 8) & 0xff);
mac[macpos+10] = (byte) ((this.h[5] >>> 0) & 0xff);
mac[macpos+11] = (byte) ((this.h[5] >>> 8) & 0xff);
mac[macpos+12] = (byte) ((this.h[6] >>> 0) & 0xff);
mac[macpos+13] = (byte) ((this.h[6] >>> 8) & 0xff);
mac[macpos+14] = (byte) ((this.h[7] >>> 0) & 0xff);
mac[macpos+15] = (byte) ((this.h[7] >>> 8) & 0xff);
return this;
}
public poly1305 update(byte [] m, int mpos, int bytes) {
int i, want;
if (this.leftover != 0) {
want = (16 - this.leftover);
if (want > bytes)
want = bytes;
for (i = 0; i < want; i++)
this.buffer[this.leftover + i] = m[mpos+i];
bytes -= want;
mpos += want;
this.leftover += want;
if (this.leftover < 16)
return this;
this.blocks(buffer, 0, 16);
this.leftover = 0;
}
if (bytes >= 16) {
want = bytes - (bytes % 16);
this.blocks(m, mpos, want);
mpos += want;
bytes -= want;
}
if (bytes != 0) {
for (i = 0; i < bytes; i++)
this.buffer[this.leftover + i] = m[mpos+i];
this.leftover += bytes;
}
return this;
}
}
private static int crypto_onetimeauth(
byte[] out,final int outpos,
byte[] m,final int mpos,
int n,
byte [] k)
{
poly1305 s = new poly1305(k);
s.update(m, mpos, n);
s.finish(out, outpos);
/*String dbgt = "";
for (int dbg = 0; dbg < out.length-outpos; dbg ++) dbgt += " "+out[dbg+outpos];
Log.d(TAG, "crypto_onetimeauth -> "+dbgt);
*/
return 0;
}
public static int crypto_onetimeauth(byte [] out, byte [] m, int /*long*/ n , byte [] k) {
return crypto_onetimeauth(out,0, m,0, n, k);
}
private static int crypto_onetimeauth_verify(
byte[] h,final int hoff,
byte[] m,final int moff,
int /*long*/ n,
byte [] k)
{
byte [] x = new byte[16];
crypto_onetimeauth(x,0,m,moff,n,k);
return crypto_verify_16(h,hoff,x,0);
}
public static int crypto_onetimeauth_verify(byte [] h, byte [] m, int /*long*/ n, byte [] k) {
return crypto_onetimeauth_verify(h,0, m,0, n, k);
}
public static int crypto_onetimeauth_verify(byte [] h, byte [] m, byte [] k) {
return crypto_onetimeauth_verify(h, m, m!=null? m.length:0, k);
}
public static int crypto_secretbox(byte [] c, byte [] m, int /*long*/ d, byte [] n, byte [] k)
{
int i;
if (d < 32) return -1;
crypto_stream_xor(c,0,m,0,d,n,k);
crypto_onetimeauth(c,16, c,32, d-32, c);
///for (i = 0; i < 16; i++) c[i] = 0;
return 0;
}
public static int crypto_secretbox_open(byte []m,byte []c,int /*long*/ d,byte []n,byte []k)
{
int i;
byte[] x = new byte[32];
if (d < 32) return -1;
crypto_stream(x,0,32,n,k);
if (crypto_onetimeauth_verify(c,16, c,32, d-32, x) != 0) return -1;
crypto_stream_xor(m,0,c,0,d,n,k);
///for (i = 0; i < 32; i++) m[i] = 0;
return 0;
}
private static void set25519(long [] r, long [] a)
{
int i;
for (i = 0; i < 16; i ++) r[i]=a[i];
}
private static void car25519(long [] o)
{
int i;
long v, c = 1;
for (i = 0; i < 16; i++) {
v = o[i] + c + 65535;
c = v>>16;
o[i] = v - c * 65536;
}
o[0] += c-1 + 37 * (c-1);
}
private static void sel25519(
long[] p,
long[] q,
int b)
{
sel25519(p,0, q,0, b);
}
private static void sel25519(
long[] p,final int poff,
long[] q,final int qoff,
int b)
{
long t, c = ~(b-1);
for (int i = 0; i < 16; i++) {
t = c & (p[i+poff] ^ q[i+qoff]);
p[i+poff] ^= t;
q[i+qoff] ^= t;
}
}
private static void pack25519(byte [] o, long [] n,final int noff)
{
int i, j, b;
long [] m = new long[16], t = new long[16];
for (i = 0; i < 16; i++) t[i] = n[i+noff];
car25519(t);
car25519(t);
car25519(t);
for (j = 0; j < 2; j++) {
m[0] = t[0] - 0xffed;
for (i = 1; i < 15; i++) {
m[i] = t[i] - 0xffff - ((m[i-1]>>16) & 1);
m[i-1] &= 0xffff;
}
m[15] = t[15] - 0x7fff - ((m[14]>>16) & 1);
b = (int) ((m[15]>>16) & 1);
m[14] &= 0xffff;
sel25519(t,0, m,0, 1-b);
}
for (i = 0; i < 16; i++) {
o[2*i] = (byte) (t[i] & 0xff);
o[2*i+1] = (byte) (t[i]>>8);
}
}
private static int neq25519(long [] a, long [] b) {
return neq25519(a,0, b,0);
}
private static int neq25519(long [] a,final int aoff, long [] b,final int boff)
{
byte [] c = new byte[32], d = new byte[32];
pack25519(c, a,aoff);
pack25519(d, b,boff);
return crypto_verify_32(c, 0, d, 0);
}
private static byte par25519(long [] a)
{
return par25519(a,0);
}
private static byte par25519(long [] a,final int aoff)
{
byte [] d = new byte[32];
pack25519(d, a,aoff);
return (byte) (d[0] & 1);
}
private static void unpack25519(long [] o, byte [] n)
{
int i;
for (i = 0; i < 16; i ++) o[i]=(n[2*i]&0xff)+((long)((n[2*i+1]<<8)&0xffff));
o[15] &= 0x7fff;
}
private static void A(
long [] o,
long [] a,
long [] b)
{
A(o,0, a,0, b,0);
}
private static void A(
long [] o,final int ooff,
long [] a,final int aoff,
long [] b,final int boff)
{
int i;
for (i = 0; i < 16; i ++) o[i+ooff] = a[i+aoff] + b[i+boff];
}
private static void Z(
long [] o,
long [] a,
long [] b)
{
Z(o,0, a,0, b,0);
}
private static void Z(
long [] o,final int ooff,
long [] a,final int aoff,
long [] b,final int boff)
{
int i;
for (i = 0; i < 16; i ++) o[i+ooff] = a[i+aoff] - b[i+boff];
}
private static void M(
long [] o,
long [] a,
long [] b)
{
M(o,0, a,0, b,0);
}
private static void M(
long [] o,final int ooff,
long [] a,final int aoff,
long [] b,final int boff)
{
long v, c,
t0 = 0, t1 = 0, t2 = 0, t3 = 0, t4 = 0, t5 = 0, t6 = 0, t7 = 0,
t8 = 0, t9 = 0, t10 = 0, t11 = 0, t12 = 0, t13 = 0, t14 = 0, t15 = 0,
t16 = 0, t17 = 0, t18 = 0, t19 = 0, t20 = 0, t21 = 0, t22 = 0, t23 = 0,
t24 = 0, t25 = 0, t26 = 0, t27 = 0, t28 = 0, t29 = 0, t30 = 0,
b0 = b[0 +boff],
b1 = b[1 +boff],
b2 = b[2 +boff],
b3 = b[3 +boff],
b4 = b[4 +boff],
b5 = b[5 +boff],
b6 = b[6 +boff],
b7 = b[7 +boff],
b8 = b[8 +boff],
b9 = b[9 +boff],
b10 = b[10 +boff],
b11 = b[11 +boff],
b12 = b[12 +boff],
b13 = b[13 +boff],
b14 = b[14 +boff],
b15 = b[15 +boff];
v = a[0 +aoff];
t0 += v * b0;
t1 += v * b1;
t2 += v * b2;
t3 += v * b3;
t4 += v * b4;
t5 += v * b5;
t6 += v * b6;
t7 += v * b7;
t8 += v * b8;
t9 += v * b9;
t10 += v * b10;
t11 += v * b11;
t12 += v * b12;
t13 += v * b13;
t14 += v * b14;
t15 += v * b15;
v = a[1 +aoff];
t1 += v * b0;
t2 += v * b1;
t3 += v * b2;
t4 += v * b3;
t5 += v * b4;
t6 += v * b5;
t7 += v * b6;
t8 += v * b7;
t9 += v * b8;
t10 += v * b9;
t11 += v * b10;
t12 += v * b11;
t13 += v * b12;
t14 += v * b13;
t15 += v * b14;
t16 += v * b15;
v = a[2 +aoff];
t2 += v * b0;
t3 += v * b1;
t4 += v * b2;
t5 += v * b3;
t6 += v * b4;
t7 += v * b5;
t8 += v * b6;
t9 += v * b7;
t10 += v * b8;
t11 += v * b9;
t12 += v * b10;
t13 += v * b11;
t14 += v * b12;
t15 += v * b13;
t16 += v * b14;
t17 += v * b15;
v = a[3 +aoff];
t3 += v * b0;
t4 += v * b1;
t5 += v * b2;
t6 += v * b3;
t7 += v * b4;
t8 += v * b5;
t9 += v * b6;
t10 += v * b7;
t11 += v * b8;
t12 += v * b9;
t13 += v * b10;
t14 += v * b11;
t15 += v * b12;
t16 += v * b13;
t17 += v * b14;
t18 += v * b15;
v = a[4 +aoff];
t4 += v * b0;
t5 += v * b1;
t6 += v * b2;
t7 += v * b3;
t8 += v * b4;
t9 += v * b5;
t10 += v * b6;
t11 += v * b7;
t12 += v * b8;
t13 += v * b9;
t14 += v * b10;
t15 += v * b11;
t16 += v * b12;
t17 += v * b13;
t18 += v * b14;
t19 += v * b15;
v = a[5 +aoff];
t5 += v * b0;
t6 += v * b1;
t7 += v * b2;
t8 += v * b3;
t9 += v * b4;
t10 += v * b5;
t11 += v * b6;
t12 += v * b7;
t13 += v * b8;
t14 += v * b9;
t15 += v * b10;
t16 += v * b11;
t17 += v * b12;
t18 += v * b13;
t19 += v * b14;
t20 += v * b15;
v = a[6 +aoff];
t6 += v * b0;
t7 += v * b1;
t8 += v * b2;
t9 += v * b3;
t10 += v * b4;
t11 += v * b5;
t12 += v * b6;
t13 += v * b7;
t14 += v * b8;
t15 += v * b9;
t16 += v * b10;
t17 += v * b11;
t18 += v * b12;
t19 += v * b13;
t20 += v * b14;
t21 += v * b15;
v = a[7 +aoff];
t7 += v * b0;
t8 += v * b1;
t9 += v * b2;
t10 += v * b3;
t11 += v * b4;
t12 += v * b5;
t13 += v * b6;
t14 += v * b7;
t15 += v * b8;
t16 += v * b9;
t17 += v * b10;
t18 += v * b11;
t19 += v * b12;
t20 += v * b13;
t21 += v * b14;
t22 += v * b15;
v = a[8 +aoff];
t8 += v * b0;
t9 += v * b1;
t10 += v * b2;
t11 += v * b3;
t12 += v * b4;
t13 += v * b5;
t14 += v * b6;
t15 += v * b7;
t16 += v * b8;
t17 += v * b9;
t18 += v * b10;
t19 += v * b11;
t20 += v * b12;
t21 += v * b13;
t22 += v * b14;
t23 += v * b15;
v = a[9 +aoff];
t9 += v * b0;
t10 += v * b1;
t11 += v * b2;
t12 += v * b3;
t13 += v * b4;
t14 += v * b5;
t15 += v * b6;
t16 += v * b7;
t17 += v * b8;
t18 += v * b9;
t19 += v * b10;
t20 += v * b11;
t21 += v * b12;
t22 += v * b13;
t23 += v * b14;
t24 += v * b15;
v = a[10 +aoff];
t10 += v * b0;
t11 += v * b1;
t12 += v * b2;
t13 += v * b3;
t14 += v * b4;
t15 += v * b5;
t16 += v * b6;
t17 += v * b7;
t18 += v * b8;
t19 += v * b9;
t20 += v * b10;
t21 += v * b11;
t22 += v * b12;
t23 += v * b13;
t24 += v * b14;
t25 += v * b15;
v = a[11 +aoff];
t11 += v * b0;
t12 += v * b1;
t13 += v * b2;
t14 += v * b3;
t15 += v * b4;
t16 += v * b5;
t17 += v * b6;
t18 += v * b7;
t19 += v * b8;
t20 += v * b9;
t21 += v * b10;
t22 += v * b11;
t23 += v * b12;
t24 += v * b13;
t25 += v * b14;
t26 += v * b15;
v = a[12 +aoff];
t12 += v * b0;
t13 += v * b1;
t14 += v * b2;
t15 += v * b3;
t16 += v * b4;
t17 += v * b5;
t18 += v * b6;
t19 += v * b7;
t20 += v * b8;
t21 += v * b9;
t22 += v * b10;
t23 += v * b11;
t24 += v * b12;
t25 += v * b13;
t26 += v * b14;
t27 += v * b15;
v = a[13 +aoff];
t13 += v * b0;
t14 += v * b1;
t15 += v * b2;
t16 += v * b3;
t17 += v * b4;
t18 += v * b5;
t19 += v * b6;
t20 += v * b7;
t21 += v * b8;
t22 += v * b9;
t23 += v * b10;
t24 += v * b11;
t25 += v * b12;
t26 += v * b13;
t27 += v * b14;
t28 += v * b15;
v = a[14 +aoff];
t14 += v * b0;
t15 += v * b1;
t16 += v * b2;
t17 += v * b3;
t18 += v * b4;
t19 += v * b5;
t20 += v * b6;
t21 += v * b7;
t22 += v * b8;
t23 += v * b9;
t24 += v * b10;
t25 += v * b11;
t26 += v * b12;
t27 += v * b13;
t28 += v * b14;
t29 += v * b15;
v = a[15 +aoff];
t15 += v * b0;
t16 += v * b1;
t17 += v * b2;
t18 += v * b3;
t19 += v * b4;
t20 += v * b5;
t21 += v * b6;
t22 += v * b7;
t23 += v * b8;
t24 += v * b9;
t25 += v * b10;
t26 += v * b11;
t27 += v * b12;
t28 += v * b13;
t29 += v * b14;
t30 += v * b15;
t0 += 38 * t16;
t1 += 38 * t17;
t2 += 38 * t18;
t3 += 38 * t19;
t4 += 38 * t20;
t5 += 38 * t21;
t6 += 38 * t22;
t7 += 38 * t23;
t8 += 38 * t24;
t9 += 38 * t25;
t10 += 38 * t26;
t11 += 38 * t27;
t12 += 38 * t28;
t13 += 38 * t29;
t14 += 38 * t30;
// t15 left as is
// first car
c = 1;
v = t0 + c + 65535; c = v >> 16; t0 = v - c * 65536;
v = t1 + c + 65535; c = v >> 16; t1 = v - c * 65536;
v = t2 + c + 65535; c = v >> 16; t2 = v - c * 65536;
v = t3 + c + 65535; c = v >> 16; t3 = v - c * 65536;
v = t4 + c + 65535; c = v >> 16; t4 = v - c * 65536;
v = t5 + c + 65535; c = v >> 16; t5 = v - c * 65536;
v = t6 + c + 65535; c = v >> 16; t6 = v - c * 65536;
v = t7 + c + 65535; c = v >> 16; t7 = v - c * 65536;
v = t8 + c + 65535; c = v >> 16; t8 = v - c * 65536;
v = t9 + c + 65535; c = v >> 16; t9 = v - c * 65536;
v = t10 + c + 65535; c = v >> 16; t10 = v - c * 65536;
v = t11 + c + 65535; c = v >> 16; t11 = v - c * 65536;
v = t12 + c + 65535; c = v >> 16; t12 = v - c * 65536;
v = t13 + c + 65535; c = v >> 16; t13 = v - c * 65536;
v = t14 + c + 65535; c = v >> 16; t14 = v - c * 65536;
v = t15 + c + 65535; c = v >> 16; t15 = v - c * 65536;
t0 += c-1 + 37 * (c-1);
// second car
c = 1;
v = t0 + c + 65535; c = v >> 16; t0 = v - c * 65536;
v = t1 + c + 65535; c = v >> 16; t1 = v - c * 65536;
v = t2 + c + 65535; c = v >> 16; t2 = v - c * 65536;
v = t3 + c + 65535; c = v >> 16; t3 = v - c * 65536;
v = t4 + c + 65535; c = v >> 16; t4 = v - c * 65536;
v = t5 + c + 65535; c = v >> 16; t5 = v - c * 65536;
v = t6 + c + 65535; c = v >> 16; t6 = v - c * 65536;
v = t7 + c + 65535; c = v >> 16; t7 = v - c * 65536;
v = t8 + c + 65535; c = v >> 16; t8 = v - c * 65536;
v = t9 + c + 65535; c = v >> 16; t9 = v - c * 65536;
v = t10 + c + 65535; c = v >> 16; t10 = v - c * 65536;
v = t11 + c + 65535; c = v >> 16; t11 = v - c * 65536;
v = t12 + c + 65535; c = v >> 16; t12 = v - c * 65536;
v = t13 + c + 65535; c = v >> 16; t13 = v - c * 65536;
v = t14 + c + 65535; c = v >> 16; t14 = v - c * 65536;
v = t15 + c + 65535; c = v >> 16; t15 = v - c * 65536;
t0 += c-1 + 37 * (c-1);
o[ 0 +ooff] = t0;
o[ 1 +ooff] = t1;
o[ 2 +ooff] = t2;
o[ 3 +ooff] = t3;
o[ 4 +ooff] = t4;
o[ 5 +ooff] = t5;
o[ 6 +ooff] = t6;
o[ 7 +ooff] = t7;
o[ 8 +ooff] = t8;
o[ 9 +ooff] = t9;
o[10 +ooff] = t10;
o[11 +ooff] = t11;
o[12 +ooff] = t12;
o[13 +ooff] = t13;
o[14 +ooff] = t14;
o[15 +ooff] = t15;
}
private static void S(
long [] o,
long [] a)
{
S(o,0, a,0);
}
private static void S(
long [] o,final int ooff,
long [] a,final int aoff)
{
M(o,ooff, a,aoff, a,aoff);
}
private static void inv25519(
long [] o,final int ooff,
long [] i,final int ioff)
{
long [] c = new long[16];
int a;
for (a = 0; a < 16; a++) c[a] = i[a+ioff];
for (a = 253; a >= 0; a--) {
S(c,0, c,0);
if(a != 2 && a != 4) M(c,0, c,0, i,ioff);
}
for (a = 0; a < 16; a++) o[a+ooff] = c[a];
}
private static void pow2523(long [] o,long [] i)
{
long [] c = new long[16];
int a;
for (a = 0; a < 16; a ++) c[a]=i[a];
for(a=250;a>=0;a--) {
S(c,0, c,0);
if(a!=1) M(c,0, c,0, i,0);
}
for (a = 0; a < 16; a ++) o[a]=c[a];
}
public static int crypto_scalarmult(byte []q,byte []n,byte []p)
{
byte [] z = new byte[32];
long [] x = new long[80];
int r, i;
long [] a = new long[16], b = new long[16], c = new long[16],
d = new long[16], e = new long[16], f = new long[16];
for (i = 0; i < 31; i++) z[i] = n[i];
z[31]=(byte) (((n[31]&127)|64) & 0xff);
z[0]&=248;
unpack25519(x,p);
for (i = 0; i < 16; i++) {
b[i]=x[i];
d[i]=a[i]=c[i]=0;
}
a[0]=d[0]=1;
for (i=254;i>=0;--i) {
r=(z[i>>>3]>>>(i&7))&1;
sel25519(a,b,r);
sel25519(c,d,r);
A(e,a,c);
Z(a,a,c);
A(c,b,d);
Z(b,b,d);
S(d,e);
S(f,a);
M(a,c,a);
M(c,b,e);
A(e,a,c);
Z(a,a,c);
S(b,a);
Z(c,d,f);
M(a,c,_121665);
A(a,a,d);
M(c,c,a);
M(a,d,f);
M(d,b,x);
S(b,e);
sel25519(a,b,r);
sel25519(c,d,r);
}
for (i = 0; i < 16; i++) {
x[i+16]=a[i];
x[i+32]=c[i];
x[i+48]=b[i];
x[i+64]=d[i];
}
inv25519(x,32, x,32);
M(x,16, x,16, x,32);
pack25519(q, x,16);
return 0;
}
public static int crypto_scalarmult_base(byte []q,byte []n)
{
return crypto_scalarmult(q,n,_9);
}
public static int crypto_box_keypair(byte [] y, byte [] x)
{
randombytes(x,32);
return crypto_scalarmult_base(y,x);
}
public static int crypto_box_beforenm(byte []k,byte []y,byte []x)
{
byte[] s = new byte[32];
crypto_scalarmult(s,x,y);
/*String dbgt = "";
for (int dbg = 0; dbg < s.length; dbg ++) dbgt += " "+s[dbg];
Log.d(TAG, "crypto_box_beforenm -> "+dbgt);
dbgt = "";
for (int dbg = 0; dbg < x.length; dbg ++) dbgt += " "+x[dbg];
Log.d(TAG, "crypto_box_beforenm, x -> "+dbgt);
dbgt = "";
for (int dbg = 0; dbg < y.length; dbg ++) dbgt += " "+y[dbg];
Log.d(TAG, "crypto_box_beforenm, y -> "+dbgt);
*/
return crypto_core_hsalsa20(k, _0, s, sigma);
}
public static int crypto_box_afternm(byte []c,byte []m,int /*long*/ d,byte []n,byte []k)
{
return crypto_secretbox(c,m,d,n,k);
}
public static int crypto_box_open_afternm(byte []m,byte []c,int /*long*/ d,byte []n,byte []k)
{
return crypto_secretbox_open(m,c,d,n,k);
}
public static int crypto_box(byte []c,byte []m,int /*long*/ d,byte []n,byte []y,byte []x)
{
byte[] k = new byte[32];
///L/og.d(TAG, "crypto_box start ...");
crypto_box_beforenm(k,y,x);
return crypto_box_afternm(c,m,d,n,k);
}
public static int crypto_box_open(byte []m,byte []c,int /*long*/ d,byte []n,byte []y,byte []x)
{
byte[] k = new byte[32];
crypto_box_beforenm(k,y,x);
return crypto_box_open_afternm(m,c,d,n,k);
}
private static final long K[] = {
0x428a2f98d728ae22L, 0x7137449123ef65cdL, 0xb5c0fbcfec4d3b2fL, 0xe9b5dba58189dbbcL,
0x3956c25bf348b538L, 0x59f111f1b605d019L, 0x923f82a4af194f9bL, 0xab1c5ed5da6d8118L,
0xd807aa98a3030242L, 0x12835b0145706fbeL, 0x243185be4ee4b28cL, 0x550c7dc3d5ffb4e2L,
0x72be5d74f27b896fL, 0x80deb1fe3b1696b1L, 0x9bdc06a725c71235L, 0xc19bf174cf692694L,
0xe49b69c19ef14ad2L, 0xefbe4786384f25e3L, 0x0fc19dc68b8cd5b5L, 0x240ca1cc77ac9c65L,
0x2de92c6f592b0275L, 0x4a7484aa6ea6e483L, 0x5cb0a9dcbd41fbd4L, 0x76f988da831153b5L,
0x983e5152ee66dfabL, 0xa831c66d2db43210L, 0xb00327c898fb213fL, 0xbf597fc7beef0ee4L,
0xc6e00bf33da88fc2L, 0xd5a79147930aa725L, 0x06ca6351e003826fL, 0x142929670a0e6e70L,
0x27b70a8546d22ffcL, 0x2e1b21385c26c926L, 0x4d2c6dfc5ac42aedL, 0x53380d139d95b3dfL,
0x650a73548baf63deL, 0x766a0abb3c77b2a8L, 0x81c2c92e47edaee6L, 0x92722c851482353bL,
0xa2bfe8a14cf10364L, 0xa81a664bbc423001L, 0xc24b8b70d0f89791L, 0xc76c51a30654be30L,
0xd192e819d6ef5218L, 0xd69906245565a910L, 0xf40e35855771202aL, 0x106aa07032bbd1b8L,
0x19a4c116b8d2d0c8L, 0x1e376c085141ab53L, 0x2748774cdf8eeb99L, 0x34b0bcb5e19b48a8L,
0x391c0cb3c5c95a63L, 0x4ed8aa4ae3418acbL, 0x5b9cca4f7763e373L, 0x682e6ff3d6b2b8a3L,
0x748f82ee5defb2fcL, 0x78a5636f43172f60L, 0x84c87814a1f0ab72L, 0x8cc702081a6439ecL,
0x90befffa23631e28L, 0xa4506cebde82bde9L, 0xbef9a3f7b2c67915L, 0xc67178f2e372532bL,
0xca273eceea26619cL, 0xd186b8c721c0c207L, 0xeada7dd6cde0eb1eL, 0xf57d4f7fee6ed178L,
0x06f067aa72176fbaL, 0x0a637dc5a2c898a6L, 0x113f9804bef90daeL, 0x1b710b35131c471bL,
0x28db77f523047d84L, 0x32caab7b40c72493L, 0x3c9ebe0a15c9bebcL, 0x431d67c49c100d4cL,
0x4cc5d4becb3e42b6L, 0x597f299cfc657e2aL, 0x5fcb6fab3ad6faecL, 0x6c44198c4a475817L
};
private static int crypto_hashblocks_hl(int [] hh,int [] hl, byte [] m,final int moff, int n) {
///String dbgt = "";
///for (int dbg = 0; dbg < n; dbg ++) dbgt += " "+m[dbg+moff];
///Log.d(TAG, "crypto_hashblocks_hl m/"+n + "-> "+dbgt);
int [] wh = new int[16], wl = new int[16];
int bh0, bh1, bh2, bh3, bh4, bh5, bh6, bh7,
bl0, bl1, bl2, bl3, bl4, bl5, bl6, bl7,
th, tl, h, l, i, j, a, b, c, d;
int ah0 = hh[0],
ah1 = hh[1],
ah2 = hh[2],
ah3 = hh[3],
ah4 = hh[4],
ah5 = hh[5],
ah6 = hh[6],
ah7 = hh[7],
al0 = hl[0],
al1 = hl[1],
al2 = hl[2],
al3 = hl[3],
al4 = hl[4],
al5 = hl[5],
al6 = hl[6],
al7 = hl[7];
int pos = 0;
while (n >= 128) {
for (i = 0; i < 16; i++) {
j = 8 * i + pos;
wh[i] = ((m[j+0+moff]&0xff) << 24) | ((m[j+1+moff]&0xff) << 16) | ((m[j+2+moff]&0xff) << 8) | ((m[j+3+moff]&0xff) << 0);
wl[i] = ((m[j+4+moff]&0xff) << 24) | ((m[j+5+moff]&0xff) << 16) | ((m[j+6+moff]&0xff) << 8) | ((m[j+7+moff]&0xff) << 0);
}
for (i = 0; i < 80; i++) {
bh0 = ah0;
bh1 = ah1;
bh2 = ah2;
bh3 = ah3;
bh4 = ah4;
bh5 = ah5;
bh6 = ah6;
bh7 = ah7;
bl0 = al0;
bl1 = al1;
bl2 = al2;
bl3 = al3;
bl4 = al4;
bl5 = al5;
bl6 = al6;
bl7 = al7;
// add
h = ah7;
l = al7;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
// Sigma1
h = ((ah4 >>> 14) | (al4 << (32-14))) ^ ((ah4 >>> 18) | (al4 << (32-18))) ^ ((al4 >>> (41-32)) | (ah4 << (32-(41-32))));
l = ((al4 >>> 14) | (ah4 << (32-14))) ^ ((al4 >>> 18) | (ah4 << (32-18))) ^ ((ah4 >>> (41-32)) | (al4 << (32-(41-32))));
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
// Ch
h = (ah4 & ah5) ^ (~ah4 & ah6);
l = (al4 & al5) ^ (~al4 & al6);
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
// K
///h = K[i*2];
///l = K[i*2+1];
h = (int) ((K[i]>>>32) & 0xffffffff);
l = (int) ((K[i]>>> 0) & 0xffffffff);
///Log.d(TAG, "i"+i + ",h:0x"+Integer.toHexString(h) + ",l:0x"+Integer.toHexString(l));
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
// w
h = wh[i%16];
l = wl[i%16];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
th = c & 0xffff | d << 16;
tl = a & 0xffff | b << 16;
// add
h = th;
l = tl;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
// Sigma0
h = ((ah0 >>> 28) | (al0 << (32-28))) ^ ((al0 >>> (34-32)) | (ah0 << (32-(34-32)))) ^ ((al0 >>> (39-32)) | (ah0 << (32-(39-32))));
l = ((al0 >>> 28) | (ah0 << (32-28))) ^ ((ah0 >>> (34-32)) | (al0 << (32-(34-32)))) ^ ((ah0 >>> (39-32)) | (al0 << (32-(39-32))));
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
// Maj
h = (ah0 & ah1) ^ (ah0 & ah2) ^ (ah1 & ah2);
l = (al0 & al1) ^ (al0 & al2) ^ (al1 & al2);
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
bh7 = (c & 0xffff) | (d << 16);
bl7 = (a & 0xffff) | (b << 16);
// add
h = bh3;
l = bl3;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = th;
l = tl;
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
bh3 = (c & 0xffff) | (d << 16);
bl3 = (a & 0xffff) | (b << 16);
ah1 = bh0;
ah2 = bh1;
ah3 = bh2;
ah4 = bh3;
ah5 = bh4;
ah6 = bh5;
ah7 = bh6;
ah0 = bh7;
al1 = bl0;
al2 = bl1;
al3 = bl2;
al4 = bl3;
al5 = bl4;
al6 = bl5;
al7 = bl6;
al0 = bl7;
if (i%16 == 15) {
for (j = 0; j < 16; j++) {
// add
h = wh[j];
l = wl[j];
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = wh[(j+9)%16];
l = wl[(j+9)%16];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
// sigma0
th = wh[(j+1)%16];
tl = wl[(j+1)%16];
h = ((th >>> 1) | (tl << (32-1))) ^ ((th >>> 8) | (tl << (32-8))) ^ (th >>> 7);
l = ((tl >>> 1) | (th << (32-1))) ^ ((tl >>> 8) | (th << (32-8))) ^ ((tl >>> 7) | (th << (32-7)));
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
// sigma1
th = wh[(j+14)%16];
tl = wl[(j+14)%16];
h = ((th >>> 19) | (tl << (32-19))) ^ ((tl >>> (61-32)) | (th << (32-(61-32)))) ^ (th >>> 6);
l = ((tl >>> 19) | (th << (32-19))) ^ ((th >>> (61-32)) | (tl << (32-(61-32)))) ^ ((tl >>> 6) | (th << (32-6)));
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
wh[j] = (c & 0xffff) | (d << 16);
wl[j] = (a & 0xffff) | (b << 16);
}
}
}
// add
h = ah0;
l = al0;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[0];
l = hl[0];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[0] = ah0 = (c & 0xffff) | (d << 16);
hl[0] = al0 = (a & 0xffff) | (b << 16);
h = ah1;
l = al1;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[1];
l = hl[1];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[1] = ah1 = (c & 0xffff) | (d << 16);
hl[1] = al1 = (a & 0xffff) | (b << 16);
h = ah2;
l = al2;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[2];
l = hl[2];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[2] = ah2 = (c & 0xffff) | (d << 16);
hl[2] = al2 = (a & 0xffff) | (b << 16);
h = ah3;
l = al3;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[3];
l = hl[3];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[3] = ah3 = (c & 0xffff) | (d << 16);
hl[3] = al3 = (a & 0xffff) | (b << 16);
h = ah4;
l = al4;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[4];
l = hl[4];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[4] = ah4 = (c & 0xffff) | (d << 16);
hl[4] = al4 = (a & 0xffff) | (b << 16);
h = ah5;
l = al5;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[5];
l = hl[5];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[5] = ah5 = (c & 0xffff) | (d << 16);
hl[5] = al5 = (a & 0xffff) | (b << 16);
h = ah6;
l = al6;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[6];
l = hl[6];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[6] = ah6 = (c & 0xffff) | (d << 16);
hl[6] = al6 = (a & 0xffff) | (b << 16);
h = ah7;
l = al7;
a = l & 0xffff; b = l >>> 16;
c = h & 0xffff; d = h >>> 16;
h = hh[7];
l = hl[7];
a += l & 0xffff; b += l >>> 16;
c += h & 0xffff; d += h >>> 16;
b += a >>> 16;
c += b >>> 16;
d += c >>> 16;
hh[7] = ah7 = (c & 0xffff) | (d << 16);
hl[7] = al7 = (a & 0xffff) | (b << 16);
pos += 128;
n -= 128;
/*dbgt = "";
for (int dbg = 0; dbg < hh.length; dbg ++) dbgt += " "+hh[dbg];
Log.d(TAG, "\ncrypto_hashblocks_hl hh -> "+dbgt);
dbgt = "";
for (int dbg = 0; dbg < hl.length; dbg ++) dbgt += " "+hl[dbg];
Log.d(TAG, "\ncrypto_hashblocks_hl hl -> "+dbgt);*/
}
return n;
}
// TBD 64bits of n
///int crypto_hash(byte [] out, byte [] m, long n)
public static int crypto_hash(byte [] out, byte [] m,final int moff, int n)
{
int [] hh = new int[8],
hl = new int[8];
byte [] x = new byte[256];
int i, b = n;
long u;
hh[0] = 0x6a09e667;
hh[1] = 0xbb67ae85;
hh[2] = 0x3c6ef372;
hh[3] = 0xa54ff53a;
hh[4] = 0x510e527f;
hh[5] = 0x9b05688c;
hh[6] = 0x1f83d9ab;
hh[7] = 0x5be0cd19;
hl[0] = 0xf3bcc908;
hl[1] = 0x84caa73b;
hl[2] = 0xfe94f82b;
hl[3] = 0x5f1d36f1;
hl[4] = 0xade682d1;
hl[5] = 0x2b3e6c1f;
hl[6] = 0xfb41bd6b;
hl[7] = 0x137e2179;
if (n >= 128) {
crypto_hashblocks_hl(hh, hl, m,moff, n);
n %= 128;
}
for (i = 0; i < n; i++) x[i] = m[b-n+i +moff];
x[n] = (byte) 128;
n = 256-128*(n<112?1:0);
x[n-9] = 0;
ts64(x, n-8, b<<3/*(b / 0x20000000) | 0, b << 3*/);
crypto_hashblocks_hl(hh, hl, x,0, n);
for (i = 0; i < 8; i++) {
u = hh[i]; u <<= 32; u |= hl[i]&0xffffffffL;
ts64(out, 8*i, u);
}
return 0;
}
public static int crypto_hash(byte [] out, byte [] m) {
return crypto_hash(out, m,0, m!=null? m.length : 0);
}
// gf: long[16]
///private static void add(gf p[4],gf q[4])
private static void add(long [] p[], long [] q[])
{
long [] a = new long[16];
long [] b = new long[16];
long [] c = new long[16];
long [] d = new long[16];
long [] t = new long[16];
long [] e = new long[16];
long [] f = new long[16];
long [] g = new long[16];
long [] h = new long[16];
long [] p0 = p[0];
long [] p1 = p[1];
long [] p2 = p[2];
long [] p3 = p[3];
long [] q0 = q[0];
long [] q1 = q[1];
long [] q2 = q[2];
long [] q3 = q[3];
Z(a,0, p1,0, p0,0);
Z(t,0, q1,0, q0,0);
M(a,0, a,0, t,0);
A(b,0, p0,0, p1,0);
A(t,0, q0,0, q1,0);
M(b,0, b,0, t,0);
M(c,0, p3,0, q3,0);
M(c,0, c,0, D2,0);
M(d,0, p2,0, q2,0);
A(d,0, d,0, d,0);
Z(e,0, b,0, a,0);
Z(f,0, d,0, c,0);
A(g,0, d,0, c,0);
A(h,0, b,0, a,0);
M(p0,0, e,0, f,0);
M(p1,0, h,0, g,0);
M(p2,0, g,0, f,0);
M(p3,0, e,0, h,0);
}
private static void cswap(long [] p[], long [] q[], byte b)
{
int i;
for (i = 0; i < 4; i ++)
sel25519(p[i],0, q[i],0, b);
}
private static void pack(byte [] r, long [] p[])
{
long [] tx = new long[16];
long [] ty = new long[16];
long [] zi = new long[16];
inv25519(zi,0, p[2],0);
M(tx,0, p[0],0, zi,0);
M(ty,0, p[1],0, zi,0);
pack25519(r, ty,0);
r[31] ^= par25519(tx,0) << 7;
}
private static void scalarmult(long [] p[], long [] q[], byte[] s,final int soff)
{
int i;
set25519(p[0],gf0);
set25519(p[1],gf1);
set25519(p[2],gf1);
set25519(p[3],gf0);
for (i = 255;i >= 0;--i) {
byte b = (byte) ((s[i/8+soff] >>> (i&7))&1);
cswap(p,q,b);
add(q,p);
add(p,p);
cswap(p,q,b);
}
///String dbgt = "";
///for (int dbg = 0; dbg < p.length; dbg ++) for (int dd = 0; dd < p[dbg].length; dd ++) dbgt += " "+p[dbg][dd];
///L/og.d(TAG, "scalarmult -> "+dbgt);
}
private static void scalarbase(long [] p[], byte[] s,final int soff)
{
long [] [] q = new long [4] [];
q[0] = new long [16];
q[1] = new long [16];
q[2] = new long [16];
q[3] = new long [16];
set25519(q[0],X);
set25519(q[1],Y);
set25519(q[2],gf1);
M(q[3],0, X,0, Y,0);
scalarmult(p,q, s,soff);
}
public static int crypto_sign_keypair(byte [] pk, byte [] sk, boolean seeded) {
byte [] d = new byte[64];
long [] [] p = new long [4] [];
p[0] = new long [16];
p[1] = new long [16];
p[2] = new long [16];
p[3] = new long [16];
int i;
if (!seeded) randombytes(sk, 32);
crypto_hash(d, sk,0, 32);
d[0] &= 248;
d[31] &= 127;
d[31] |= 64;
scalarbase(p, d,0);
pack(pk, p);
for (i = 0; i < 32; i++) sk[i+32] = pk[i];
return 0;
}
private static final long L[] = {
0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58,
0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0x10
};
private static void modL(byte[] r,final int roff, long x[])
{
long carry;
int i, j;
for (i = 63;i >= 32;--i) {
carry = 0;
for (j = i - 32;j < i - 12;++j) {
x[j] += carry - 16 * x[i] * L[j - (i - 32)];
carry = (x[j] + 128) >> 8;
x[j] -= carry << 8;
}
x[j] += carry;
x[i] = 0;
}
carry = 0;
for (j = 0; j < 32; j ++) {
x[j] += carry - (x[31] >> 4) * L[j];
carry = x[j] >> 8;
x[j] &= 255;
}
for (j = 0; j < 32; j ++) x[j] -= carry * L[j];
for (i = 0; i < 32; i ++) {
x[i+1] += x[i] >> 8;
r[i+roff] = (byte) (x[i] & 255);
}
}
private static void reduce(byte [] r)
{
long[] x = new long [64];
int i;
for (i = 0; i < 64; i ++) x[i] = (long) (r[i]&0xff);
for (i = 0; i < 64; i ++) r[i] = 0;
modL(r,0, x);
}
// TBD... 64bits of n
///int crypto_sign(byte [] sm, long * smlen, byte [] m, long n, byte [] sk)
public static int crypto_sign(byte [] sm, long dummy /* *smlen not used*/, byte [] m,final int moff, int/*long*/ n, byte [] sk)
{
byte[] d = new byte[64], h = new byte[64], r = new byte[64];
int i, j;
long [] x = new long[64];
long [] [] p = new long [4] [];
p[0] = new long [16];
p[1] = new long [16];
p[2] = new long [16];
p[3] = new long [16];
crypto_hash(d, sk,0, 32);
d[0] &= 248;
d[31] &= 127;
d[31] |= 64;
///*smlen = n+64;
for (i = 0; i < n; i ++) sm[64 + i] = m[i+moff];
for (i = 0; i < 32; i ++) sm[32 + i] = d[32 + i];
crypto_hash(r, sm,32, n+32);
reduce(r);
scalarbase(p, r,0);
pack(sm,p);
for (i = 0; i < 32; i ++) sm[i+32] = sk[i+32];
crypto_hash(h, sm,0, n + 64);
reduce(h);
for (i = 0; i < 64; i ++) x[i] = 0;
for (i = 0; i < 32; i ++) x[i] = (long) (r[i]&0xff);
for (i = 0; i < 32; i ++) for (j = 0; j < 32; j ++) x[i+j] += (h[i]&0xff) * (long) (d[j]&0xff);
modL(sm,32, x);
return 0;
}
private static int unpackneg(long [] r[], byte p[])
{
long [] t = new long [16];
long [] chk = new long [16];
long [] num = new long [16];
long [] den = new long [16];
long [] den2 = new long [16];
long [] den4 = new long [16];
long [] den6 = new long [16];
set25519(r[2], gf1);
unpack25519(r[1], p);
S(num, r[1]);
M(den, num, D);
Z(num, num, r[2]);
A(den, r[2], den);
S(den2, den);
S(den4, den2);
M(den6, den4, den2);
M(t, den6, num);
M(t, t, den);
pow2523(t, t);
M(t, t, num);
M(t, t, den);
M(t, t, den);
M(r[0], t, den);
S(chk, r[0]);
M(chk, chk, den);
if (neq25519(chk, num)!=0) M(r[0], r[0], I);
S(chk, r[0]);
M(chk, chk, den);
if (neq25519(chk, num)!=0) return -1;
if (par25519(r[0]) == ((p[31]&0xFF)>>>7)) Z(r[0], gf0, r[0]);
M(r[3], r[0], r[1]);
return 0;
}
/// TBD 64bits of mlen
///int crypto_sign_open(byte []m,long *mlen,byte []sm,long n,byte []pk)
public static int crypto_sign_open(byte [] m, long dummy /* *mlen not used*/, byte [] sm,final int smoff, int/*long*/ n, byte []pk)
{
int i;
byte[] t = new byte[32], h = new byte[64];
long [] [] p = new long [4] [];
p[0] = new long [16];
p[1] = new long [16];
p[2] = new long [16];
p[3] = new long [16];
long [] [] q = new long [4] [];
q[0] = new long [16];
q[1] = new long [16];
q[2] = new long [16];
q[3] = new long [16];
///*mlen = -1;
if (n < 64) return -1;
if (unpackneg(q,pk)!=0) return -1;
for (i = 0; i < n; i ++) m[i] = sm[i+smoff];
for (i = 0; i < 32; i ++) m[i+32] = pk[i];
crypto_hash(h, m,0, n);
reduce(h);
scalarmult(p,q, h,0);
scalarbase(q, sm,32+smoff);
add(p,q);
pack(t,p);
n -= 64;
if (crypto_verify_32(sm,smoff, t,0)!=0) {
// optimizing it
///for (i = 0; i < n; i ++) m[i] = 0;
return -1;
}
// TBD optimizing ...
///for (i = 0; i < n; i ++) m[i] = sm[i + 64 + smoff];
///*mlen = n;
return 0;
}
/*
* @description
* Java SecureRandom generator
* */
private static final SecureRandom jrandom = new SecureRandom();
public static byte[] randombytes(byte [] x) {
jrandom.nextBytes(x);
return x;
}
public static byte[] randombytes(int len) {
return randombytes(new byte[len]);
}
public static byte[] randombytes(byte [] x, int len) {
byte [] b = randombytes(len);
System.arraycopy(b, 0, x, 0, len);
return x;
}
/*
public static byte[] randombytes(byte [] x, int len) {
int ret = len % 8;
long rnd;
for (int i = 0; i < len-ret; i += 8) {
rnd = jrandom.nextLong();
x[i+0] = (byte) (rnd >>> 0);
x[i+1] = (byte) (rnd >>> 8);
x[i+2] = (byte) (rnd >>> 16);
x[i+3] = (byte) (rnd >>> 24);
x[i+4] = (byte) (rnd >>> 32);
x[i+5] = (byte) (rnd >>> 40);
x[i+6] = (byte) (rnd >>> 48);
x[i+7] = (byte) (rnd >>> 56);
}
if (ret > 0) {
rnd = jrandom.nextLong();
for (int i = len-ret; i < len; i ++)
x[i] = (byte) (rnd >>> 8*i);
}
return x;
}
*/
public static byte[] makeBoxNonce() {
return randombytes(Box.nonceLength);
}
public static byte[] makeSecretBoxNonce() {
return randombytes(SecretBox.nonceLength);
}
public static String hexEncodeToString( byte [] raw ) {
String HEXES = "0123456789ABCDEF";
final StringBuilder hex = new StringBuilder( 2 * raw.length );
for ( final byte b : raw ) {
hex.append(HEXES.charAt((b & 0xF0) >> 4))
.append(HEXES.charAt((b & 0x0F)));
}
return hex.toString();
}
public static byte[] hexDecode(String s) {
byte[] b = new byte[s.length() / 2];
for (int i = 0; i < s.length(); i += 2) {
b[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
+ Character.digit(s.charAt(i+1), 16));
}
return b;
}
// public static boolean java.util.Arrays.equals(array1, array2);
}
