mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
2fc507c98f
* modelines: tw -> sw shiftwidth, not textwidth. * space-surround modelines * fix irregular modelines * Fix modeline in titlegen.c
95 lines
4 KiB
C
95 lines
4 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
|
|
╚──────────────────────────────────────────────────────────────────────────────╝
|
|
│ │
|
|
│ Musl Libc │
|
|
│ Copyright © 2005-2014 Rich Felker, et al. │
|
|
│ │
|
|
│ Permission is hereby granted, free of charge, to any person obtaining │
|
|
│ a copy of this software and associated documentation files (the │
|
|
│ "Software"), to deal in the Software without restriction, including │
|
|
│ without limitation the rights to use, copy, modify, merge, publish, │
|
|
│ distribute, sublicense, and/or sell copies of the Software, and to │
|
|
│ permit persons to whom the Software is furnished to do so, subject to │
|
|
│ the following conditions: │
|
|
│ │
|
|
│ The above copyright notice and this permission notice shall be │
|
|
│ included in all copies or substantial portions of the Software. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
|
|
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
|
|
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
|
|
│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
|
|
│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
|
|
│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
|
|
│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
|
|
│ │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/weirdtypes.h"
|
|
#include "libc/fmt/conv.h"
|
|
#include "libc/limits.h"
|
|
#include "libc/literal.h"
|
|
#include "libc/mem/alg.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/stdio/rand.h"
|
|
#include "libc/temp.h"
|
|
#include "libc/sysv/consts/exit.h"
|
|
#include "libc/sysv/consts/fileno.h"
|
|
#include "libc/sysv/consts/o.h"
|
|
#include "libc/sysv/consts/ok.h"
|
|
#include "third_party/gdtoa/gdtoa.h"
|
|
#include "third_party/musl/crypt_des.internal.h"
|
|
|
|
asm(".ident\t\"\\n\\n\
|
|
Musl libc (MIT License)\\n\
|
|
Copyright 2005-2014 Rich Felker, et. al.\"");
|
|
asm(".include \"libc/disclaimer.inc\"");
|
|
|
|
static struct expanded_key __encrypt_key;
|
|
|
|
void setkey(const char *key)
|
|
{
|
|
unsigned char bkey[8];
|
|
int i, j;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
bkey[i] = 0;
|
|
for (j = 7; j >= 0; j--, key++)
|
|
bkey[i] |= (uint32_t)(*key & 1) << j;
|
|
}
|
|
|
|
__des_setkey(bkey, &__encrypt_key);
|
|
}
|
|
|
|
void encrypt(char *block, int edflag)
|
|
{
|
|
struct expanded_key decrypt_key, *key;
|
|
uint32_t b[2];
|
|
int i, j;
|
|
char *p;
|
|
|
|
p = block;
|
|
for (i = 0; i < 2; i++) {
|
|
b[i] = 0;
|
|
for (j = 31; j >= 0; j--, p++)
|
|
b[i] |= (uint32_t)(*p & 1) << j;
|
|
}
|
|
|
|
key = &__encrypt_key;
|
|
if (edflag) {
|
|
key = &decrypt_key;
|
|
for (i = 0; i < 16; i++) {
|
|
decrypt_key.l[i] = __encrypt_key.l[15-i];
|
|
decrypt_key.r[i] = __encrypt_key.r[15-i];
|
|
}
|
|
}
|
|
|
|
__do_des(b[0], b[1], b, b + 1, 1, 0, key);
|
|
|
|
p = block;
|
|
for (i = 0; i < 2; i++)
|
|
for (j = 31; j >= 0; j--)
|
|
*p++ = b[i]>>j & 1;
|
|
}
|