8e79f2ee9c
Based on Nekogram. Key additions: - Rebrand to FoxiGram (app name, APK name, applicationId com.foxigram.app) - Embedded Xray (VLESS+Reality) proxy client via JNI libxray.so - Bundled hidden one-tap proxies (LTE + WiFi), read-only in UI - Auto-restore proxy on restart, rebind to active network (LTE/WiFi) - Server credentials externalized to git-ignored XrayServers.java (+ template) - libxray Go source included; compiled .so, keystore, google-services.json ignored
130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
// Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
#include "internal.h"
|
|
#include "../../internal.h"
|
|
|
|
|
|
void CRYPTO_cbc128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
|
|
const AES_KEY *key, uint8_t ivec[16],
|
|
block128_f block) {
|
|
assert(key != NULL && ivec != NULL);
|
|
if (len == 0) {
|
|
// Avoid |ivec| == |iv| in the |memcpy| below, which is not legal in C.
|
|
return;
|
|
}
|
|
|
|
assert(in != NULL && out != NULL);
|
|
size_t n;
|
|
const uint8_t *iv = ivec;
|
|
while (len >= 16) {
|
|
CRYPTO_xor16(out, in, iv);
|
|
(*block)(out, out, key);
|
|
iv = out;
|
|
len -= 16;
|
|
in += 16;
|
|
out += 16;
|
|
}
|
|
|
|
while (len) {
|
|
for (n = 0; n < 16 && n < len; ++n) {
|
|
out[n] = in[n] ^ iv[n];
|
|
}
|
|
for (; n < 16; ++n) {
|
|
out[n] = iv[n];
|
|
}
|
|
(*block)(out, out, key);
|
|
iv = out;
|
|
if (len <= 16) {
|
|
break;
|
|
}
|
|
len -= 16;
|
|
in += 16;
|
|
out += 16;
|
|
}
|
|
|
|
OPENSSL_memcpy(ivec, iv, 16);
|
|
}
|
|
|
|
void CRYPTO_cbc128_decrypt(const uint8_t *in, uint8_t *out, size_t len,
|
|
const AES_KEY *key, uint8_t ivec[16],
|
|
block128_f block) {
|
|
assert(key != NULL && ivec != NULL);
|
|
if (len == 0) {
|
|
// Avoid |ivec| == |iv| in the |memcpy| below, which is not legal in C.
|
|
return;
|
|
}
|
|
|
|
assert(in != NULL && out != NULL);
|
|
|
|
const uintptr_t inptr = (uintptr_t) in;
|
|
const uintptr_t outptr = (uintptr_t) out;
|
|
// If |in| and |out| alias, |in| must be ahead.
|
|
assert(inptr >= outptr || inptr + len <= outptr);
|
|
|
|
size_t n;
|
|
alignas(16) uint8_t tmp[16];
|
|
if ((inptr >= 32 && outptr <= inptr - 32) || inptr < outptr) {
|
|
// If |out| is at least two blocks behind |in| or completely disjoint, there
|
|
// is no need to decrypt to a temporary block.
|
|
const uint8_t *iv = ivec;
|
|
while (len >= 16) {
|
|
(*block)(in, out, key);
|
|
CRYPTO_xor16(out, out, iv);
|
|
iv = in;
|
|
len -= 16;
|
|
in += 16;
|
|
out += 16;
|
|
}
|
|
OPENSSL_memcpy(ivec, iv, 16);
|
|
} else {
|
|
static_assert(16 % sizeof(crypto_word_t) == 0,
|
|
"block cannot be evenly divided into words");
|
|
|
|
while (len >= 16) {
|
|
(*block)(in, tmp, key);
|
|
for (n = 0; n < 16; n += sizeof(crypto_word_t)) {
|
|
crypto_word_t c = CRYPTO_load_word_le(in + n);
|
|
CRYPTO_store_word_le(out + n, CRYPTO_load_word_le(tmp + n) ^
|
|
CRYPTO_load_word_le(ivec + n));
|
|
CRYPTO_store_word_le(ivec + n, c);
|
|
}
|
|
len -= 16;
|
|
in += 16;
|
|
out += 16;
|
|
}
|
|
}
|
|
|
|
while (len) {
|
|
uint8_t c;
|
|
(*block)(in, tmp, key);
|
|
for (n = 0; n < 16 && n < len; ++n) {
|
|
c = in[n];
|
|
out[n] = tmp[n] ^ ivec[n];
|
|
ivec[n] = c;
|
|
}
|
|
if (len <= 16) {
|
|
for (; n < 16; ++n) {
|
|
ivec[n] = in[n];
|
|
}
|
|
break;
|
|
}
|
|
len -= 16;
|
|
in += 16;
|
|
out += 16;
|
|
}
|
|
}
|