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cosmopolitan/third_party/musl/crypt_des.c
Justine Tunney 957c61cbbf
Release Cosmopolitan v3.3 
This change upgrades to GCC 12.3 and GNU binutils 2.42. The GNU linker
appears to have changed things so that only a single de-duplicated str
table is present in the binary, and it gets placed wherever the linker
wants, regardless of what the linker script says. To cope with that we
need to stop using .ident to embed licenses. As such, this change does
significant work to revamp how third party licenses are defined in the
codebase, using `.section .notice,"aR",@progbits`.

This new GCC 12.3 toolchain has support for GNU indirect functions. It
lets us support __target_clones__ for the first time. This is used for
optimizing the performance of libc string functions such as strlen and
friends so far on x86, by ensuring AVX systems favor a second codepath
that uses VEX encoding. It shaves some latency off certain operations.
It's a useful feature to have for scientific computing for the reasons
explained by the test/libcxx/openmp_test.cc example which compiles for
fifteen different microarchitectures. Thanks to the upgrades, it's now
also possible to use newer instruction sets, such as AVX512FP16, VNNI.

Cosmo now uses the %gs register on x86 by default for TLS. Doing it is
helpful for any program that links `cosmo_dlopen()`. Such programs had
to recompile their binaries at startup to change the TLS instructions.
That's not great, since it means every page in the executable needs to
be faulted. The work of rewriting TLS-related x86 opcodes, is moved to
fixupobj.com instead. This is great news for MacOS x86 users, since we
previously needed to morph the binary every time for that platform but
now that's no longer necessary. The only platforms where we need fixup
of TLS x86 opcodes at runtime are now Windows, OpenBSD, and NetBSD. On
Windows we morph TLS to point deeper into the TIB, based on a TlsAlloc
assignment, and on OpenBSD/NetBSD we morph %gs back into %fs since the
kernels do not allow us to specify a value for the %gs register.

OpenBSD users are now required to use APE Loader to run Cosmo binaries
and assimilation is no longer possible. OpenBSD kernel needs to change
to allow programs to specify a value for the %gs register, or it needs
to stop marking executable pages loaded by the kernel as mimmutable().

This release fixes __constructor__, .ctor, .init_array, and lastly the
.preinit_array so they behave the exact same way as glibc.

We no longer use hex constants to define math.h symbols like M_PI.
2024-02-20 13:27:59 -08:00

1048 lines
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/*-*- 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/limits.h"
#include "libc/literal.h"
#include "libc/mem/alg.h"
#include "libc/str/str.h"
#include "third_party/musl/crypt.internal.h"
#include "third_party/musl/crypt_des.internal.h"
__static_yoink("musl_libc_notice");
#pragma GCC diagnostic ignored "-Wstringop-overflow"
/*
* This version has been further modified by Rich Felker, primary author
* and maintainer of musl libc, to remove table generation code and
* replaced all runtime-generated constant tables with static-initialized
* tables in the binary, in the interest of minimizing non-shareable
* memory usage and stack size requirements.
*/
/*
* This version is derived from the original implementation of FreeSec
* (release 1.1) by David Burren. I've made it reentrant, reduced its memory
* usage from about 70 KB to about 7 KB (with only minimal performance impact
* and keeping code size about the same), made the handling of invalid salts
* mostly UFC-crypt compatible, added a quick runtime self-test (which also
* serves to zeroize the stack from sensitive data), and added optional tests.
* - Solar Designer <solar at openwall.com>
*/
/*
* FreeSec: libcrypt for NetBSD
*
* Copyright (c) 1994 David Burren
* Copyright (c) 2000,2002,2010,2012 Solar Designer
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of other contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Owl: Owl/packages/glibc/crypt_freesec.c,v 1.6 2010/02/20 14:45:06 solar Exp $
* $Id: crypt.c,v 1.15 1994/09/13 04:58:49 davidb Exp $
*
* This is an original implementation of the DES and the crypt(3) interfaces
* by David Burren. It has been heavily re-worked by Solar Designer.
*/
#define _PASSWORD_EFMT1 '_'
static const unsigned char key_shifts[16] = {
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
};
static const uint32_t psbox[8][64] = {
{
0x00808200,0x00000000,0x00008000,0x00808202,
0x00808002,0x00008202,0x00000002,0x00008000,
0x00000200,0x00808200,0x00808202,0x00000200,
0x00800202,0x00808002,0x00800000,0x00000002,
0x00000202,0x00800200,0x00800200,0x00008200,
0x00008200,0x00808000,0x00808000,0x00800202,
0x00008002,0x00800002,0x00800002,0x00008002,
0x00000000,0x00000202,0x00008202,0x00800000,
0x00008000,0x00808202,0x00000002,0x00808000,
0x00808200,0x00800000,0x00800000,0x00000200,
0x00808002,0x00008000,0x00008200,0x00800002,
0x00000200,0x00000002,0x00800202,0x00008202,
0x00808202,0x00008002,0x00808000,0x00800202,
0x00800002,0x00000202,0x00008202,0x00808200,
0x00000202,0x00800200,0x00800200,0x00000000,
0x00008002,0x00008200,0x00000000,0x00808002,
},{
0x40084010,0x40004000,0x00004000,0x00084010,
0x00080000,0x00000010,0x40080010,0x40004010,
0x40000010,0x40084010,0x40084000,0x40000000,
0x40004000,0x00080000,0x00000010,0x40080010,
0x00084000,0x00080010,0x40004010,0x00000000,
0x40000000,0x00004000,0x00084010,0x40080000,
0x00080010,0x40000010,0x00000000,0x00084000,
0x00004010,0x40084000,0x40080000,0x00004010,
0x00000000,0x00084010,0x40080010,0x00080000,
0x40004010,0x40080000,0x40084000,0x00004000,
0x40080000,0x40004000,0x00000010,0x40084010,
0x00084010,0x00000010,0x00004000,0x40000000,
0x00004010,0x40084000,0x00080000,0x40000010,
0x00080010,0x40004010,0x40000010,0x00080010,
0x00084000,0x00000000,0x40004000,0x00004010,
0x40000000,0x40080010,0x40084010,0x00084000,
},{
0x00000104,0x04010100,0x00000000,0x04010004,
0x04000100,0x00000000,0x00010104,0x04000100,
0x00010004,0x04000004,0x04000004,0x00010000,
0x04010104,0x00010004,0x04010000,0x00000104,
0x04000000,0x00000004,0x04010100,0x00000100,
0x00010100,0x04010000,0x04010004,0x00010104,
0x04000104,0x00010100,0x00010000,0x04000104,
0x00000004,0x04010104,0x00000100,0x04000000,
0x04010100,0x04000000,0x00010004,0x00000104,
0x00010000,0x04010100,0x04000100,0x00000000,
0x00000100,0x00010004,0x04010104,0x04000100,
0x04000004,0x00000100,0x00000000,0x04010004,
0x04000104,0x00010000,0x04000000,0x04010104,
0x00000004,0x00010104,0x00010100,0x04000004,
0x04010000,0x04000104,0x00000104,0x04010000,
0x00010104,0x00000004,0x04010004,0x00010100,
},{
0x80401000,0x80001040,0x80001040,0x00000040,
0x00401040,0x80400040,0x80400000,0x80001000,
0x00000000,0x00401000,0x00401000,0x80401040,
0x80000040,0x00000000,0x00400040,0x80400000,
0x80000000,0x00001000,0x00400000,0x80401000,
0x00000040,0x00400000,0x80001000,0x00001040,
0x80400040,0x80000000,0x00001040,0x00400040,
0x00001000,0x00401040,0x80401040,0x80000040,
0x00400040,0x80400000,0x00401000,0x80401040,
0x80000040,0x00000000,0x00000000,0x00401000,
0x00001040,0x00400040,0x80400040,0x80000000,
0x80401000,0x80001040,0x80001040,0x00000040,
0x80401040,0x80000040,0x80000000,0x00001000,
0x80400000,0x80001000,0x00401040,0x80400040,
0x80001000,0x00001040,0x00400000,0x80401000,
0x00000040,0x00400000,0x00001000,0x00401040,
},{
0x00000080,0x01040080,0x01040000,0x21000080,
0x00040000,0x00000080,0x20000000,0x01040000,
0x20040080,0x00040000,0x01000080,0x20040080,
0x21000080,0x21040000,0x00040080,0x20000000,
0x01000000,0x20040000,0x20040000,0x00000000,
0x20000080,0x21040080,0x21040080,0x01000080,
0x21040000,0x20000080,0x00000000,0x21000000,
0x01040080,0x01000000,0x21000000,0x00040080,
0x00040000,0x21000080,0x00000080,0x01000000,
0x20000000,0x01040000,0x21000080,0x20040080,
0x01000080,0x20000000,0x21040000,0x01040080,
0x20040080,0x00000080,0x01000000,0x21040000,
0x21040080,0x00040080,0x21000000,0x21040080,
0x01040000,0x00000000,0x20040000,0x21000000,
0x00040080,0x01000080,0x20000080,0x00040000,
0x00000000,0x20040000,0x01040080,0x20000080,
},{
0x10000008,0x10200000,0x00002000,0x10202008,
0x10200000,0x00000008,0x10202008,0x00200000,
0x10002000,0x00202008,0x00200000,0x10000008,
0x00200008,0x10002000,0x10000000,0x00002008,
0x00000000,0x00200008,0x10002008,0x00002000,
0x00202000,0x10002008,0x00000008,0x10200008,
0x10200008,0x00000000,0x00202008,0x10202000,
0x00002008,0x00202000,0x10202000,0x10000000,
0x10002000,0x00000008,0x10200008,0x00202000,
0x10202008,0x00200000,0x00002008,0x10000008,
0x00200000,0x10002000,0x10000000,0x00002008,
0x10000008,0x10202008,0x00202000,0x10200000,
0x00202008,0x10202000,0x00000000,0x10200008,
0x00000008,0x00002000,0x10200000,0x00202008,
0x00002000,0x00200008,0x10002008,0x00000000,
0x10202000,0x10000000,0x00200008,0x10002008,
},{
0x00100000,0x02100001,0x02000401,0x00000000,
0x00000400,0x02000401,0x00100401,0x02100400,
0x02100401,0x00100000,0x00000000,0x02000001,
0x00000001,0x02000000,0x02100001,0x00000401,
0x02000400,0x00100401,0x00100001,0x02000400,
0x02000001,0x02100000,0x02100400,0x00100001,
0x02100000,0x00000400,0x00000401,0x02100401,
0x00100400,0x00000001,0x02000000,0x00100400,
0x02000000,0x00100400,0x00100000,0x02000401,
0x02000401,0x02100001,0x02100001,0x00000001,
0x00100001,0x02000000,0x02000400,0x00100000,
0x02100400,0x00000401,0x00100401,0x02100400,
0x00000401,0x02000001,0x02100401,0x02100000,
0x00100400,0x00000000,0x00000001,0x02100401,
0x00000000,0x00100401,0x02100000,0x00000400,
0x02000001,0x02000400,0x00000400,0x00100001,
},{
0x08000820,0x00000800,0x00020000,0x08020820,
0x08000000,0x08000820,0x00000020,0x08000000,
0x00020020,0x08020000,0x08020820,0x00020800,
0x08020800,0x00020820,0x00000800,0x00000020,
0x08020000,0x08000020,0x08000800,0x00000820,
0x00020800,0x00020020,0x08020020,0x08020800,
0x00000820,0x00000000,0x00000000,0x08020020,
0x08000020,0x08000800,0x00020820,0x00020000,
0x00020820,0x00020000,0x08020800,0x00000800,
0x00000020,0x08020020,0x00000800,0x00020820,
0x08000800,0x00000020,0x08000020,0x08020000,
0x08020020,0x08000000,0x00020000,0x08000820,
0x00000000,0x08020820,0x00020020,0x08000020,
0x08020000,0x08000800,0x08000820,0x00000000,
0x08020820,0x00020800,0x00020800,0x00000820,
0x00000820,0x00020020,0x08000000,0x08020800,
},
};
static const uint32_t ip_maskl[16][16] = {
{
0x00000000,0x00010000,0x00000000,0x00010000,
0x01000000,0x01010000,0x01000000,0x01010000,
0x00000000,0x00010000,0x00000000,0x00010000,
0x01000000,0x01010000,0x01000000,0x01010000,
},{
0x00000000,0x00000001,0x00000000,0x00000001,
0x00000100,0x00000101,0x00000100,0x00000101,
0x00000000,0x00000001,0x00000000,0x00000001,
0x00000100,0x00000101,0x00000100,0x00000101,
},{
0x00000000,0x00020000,0x00000000,0x00020000,
0x02000000,0x02020000,0x02000000,0x02020000,
0x00000000,0x00020000,0x00000000,0x00020000,
0x02000000,0x02020000,0x02000000,0x02020000,
},{
0x00000000,0x00000002,0x00000000,0x00000002,
0x00000200,0x00000202,0x00000200,0x00000202,
0x00000000,0x00000002,0x00000000,0x00000002,
0x00000200,0x00000202,0x00000200,0x00000202,
},{
0x00000000,0x00040000,0x00000000,0x00040000,
0x04000000,0x04040000,0x04000000,0x04040000,
0x00000000,0x00040000,0x00000000,0x00040000,
0x04000000,0x04040000,0x04000000,0x04040000,
},{
0x00000000,0x00000004,0x00000000,0x00000004,
0x00000400,0x00000404,0x00000400,0x00000404,
0x00000000,0x00000004,0x00000000,0x00000004,
0x00000400,0x00000404,0x00000400,0x00000404,
},{
0x00000000,0x00080000,0x00000000,0x00080000,
0x08000000,0x08080000,0x08000000,0x08080000,
0x00000000,0x00080000,0x00000000,0x00080000,
0x08000000,0x08080000,0x08000000,0x08080000,
},{
0x00000000,0x00000008,0x00000000,0x00000008,
0x00000800,0x00000808,0x00000800,0x00000808,
0x00000000,0x00000008,0x00000000,0x00000008,
0x00000800,0x00000808,0x00000800,0x00000808,
},{
0x00000000,0x00100000,0x00000000,0x00100000,
0x10000000,0x10100000,0x10000000,0x10100000,
0x00000000,0x00100000,0x00000000,0x00100000,
0x10000000,0x10100000,0x10000000,0x10100000,
},{
0x00000000,0x00000010,0x00000000,0x00000010,
0x00001000,0x00001010,0x00001000,0x00001010,
0x00000000,0x00000010,0x00000000,0x00000010,
0x00001000,0x00001010,0x00001000,0x00001010,
},{
0x00000000,0x00200000,0x00000000,0x00200000,
0x20000000,0x20200000,0x20000000,0x20200000,
0x00000000,0x00200000,0x00000000,0x00200000,
0x20000000,0x20200000,0x20000000,0x20200000,
},{
0x00000000,0x00000020,0x00000000,0x00000020,
0x00002000,0x00002020,0x00002000,0x00002020,
0x00000000,0x00000020,0x00000000,0x00000020,
0x00002000,0x00002020,0x00002000,0x00002020,
},{
0x00000000,0x00400000,0x00000000,0x00400000,
0x40000000,0x40400000,0x40000000,0x40400000,
0x00000000,0x00400000,0x00000000,0x00400000,
0x40000000,0x40400000,0x40000000,0x40400000,
},{
0x00000000,0x00000040,0x00000000,0x00000040,
0x00004000,0x00004040,0x00004000,0x00004040,
0x00000000,0x00000040,0x00000000,0x00000040,
0x00004000,0x00004040,0x00004000,0x00004040,
},{
0x00000000,0x00800000,0x00000000,0x00800000,
0x80000000,0x80800000,0x80000000,0x80800000,
0x00000000,0x00800000,0x00000000,0x00800000,
0x80000000,0x80800000,0x80000000,0x80800000,
},{
0x00000000,0x00000080,0x00000000,0x00000080,
0x00008000,0x00008080,0x00008000,0x00008080,
0x00000000,0x00000080,0x00000000,0x00000080,
0x00008000,0x00008080,0x00008000,0x00008080,
},
};
static const uint32_t ip_maskr[16][16] = {
{
0x00000000,0x00000000,0x00010000,0x00010000,
0x00000000,0x00000000,0x00010000,0x00010000,
0x01000000,0x01000000,0x01010000,0x01010000,
0x01000000,0x01000000,0x01010000,0x01010000,
},{
0x00000000,0x00000000,0x00000001,0x00000001,
0x00000000,0x00000000,0x00000001,0x00000001,
0x00000100,0x00000100,0x00000101,0x00000101,
0x00000100,0x00000100,0x00000101,0x00000101,
},{
0x00000000,0x00000000,0x00020000,0x00020000,
0x00000000,0x00000000,0x00020000,0x00020000,
0x02000000,0x02000000,0x02020000,0x02020000,
0x02000000,0x02000000,0x02020000,0x02020000,
},{
0x00000000,0x00000000,0x00000002,0x00000002,
0x00000000,0x00000000,0x00000002,0x00000002,
0x00000200,0x00000200,0x00000202,0x00000202,
0x00000200,0x00000200,0x00000202,0x00000202,
},{
0x00000000,0x00000000,0x00040000,0x00040000,
0x00000000,0x00000000,0x00040000,0x00040000,
0x04000000,0x04000000,0x04040000,0x04040000,
0x04000000,0x04000000,0x04040000,0x04040000,
},{
0x00000000,0x00000000,0x00000004,0x00000004,
0x00000000,0x00000000,0x00000004,0x00000004,
0x00000400,0x00000400,0x00000404,0x00000404,
0x00000400,0x00000400,0x00000404,0x00000404,
},{
0x00000000,0x00000000,0x00080000,0x00080000,
0x00000000,0x00000000,0x00080000,0x00080000,
0x08000000,0x08000000,0x08080000,0x08080000,
0x08000000,0x08000000,0x08080000,0x08080000,
},{
0x00000000,0x00000000,0x00000008,0x00000008,
0x00000000,0x00000000,0x00000008,0x00000008,
0x00000800,0x00000800,0x00000808,0x00000808,
0x00000800,0x00000800,0x00000808,0x00000808,
},{
0x00000000,0x00000000,0x00100000,0x00100000,
0x00000000,0x00000000,0x00100000,0x00100000,
0x10000000,0x10000000,0x10100000,0x10100000,
0x10000000,0x10000000,0x10100000,0x10100000,
},{
0x00000000,0x00000000,0x00000010,0x00000010,
0x00000000,0x00000000,0x00000010,0x00000010,
0x00001000,0x00001000,0x00001010,0x00001010,
0x00001000,0x00001000,0x00001010,0x00001010,
},{
0x00000000,0x00000000,0x00200000,0x00200000,
0x00000000,0x00000000,0x00200000,0x00200000,
0x20000000,0x20000000,0x20200000,0x20200000,
0x20000000,0x20000000,0x20200000,0x20200000,
},{
0x00000000,0x00000000,0x00000020,0x00000020,
0x00000000,0x00000000,0x00000020,0x00000020,
0x00002000,0x00002000,0x00002020,0x00002020,
0x00002000,0x00002000,0x00002020,0x00002020,
},{
0x00000000,0x00000000,0x00400000,0x00400000,
0x00000000,0x00000000,0x00400000,0x00400000,
0x40000000,0x40000000,0x40400000,0x40400000,
0x40000000,0x40000000,0x40400000,0x40400000,
},{
0x00000000,0x00000000,0x00000040,0x00000040,
0x00000000,0x00000000,0x00000040,0x00000040,
0x00004000,0x00004000,0x00004040,0x00004040,
0x00004000,0x00004000,0x00004040,0x00004040,
},{
0x00000000,0x00000000,0x00800000,0x00800000,
0x00000000,0x00000000,0x00800000,0x00800000,
0x80000000,0x80000000,0x80800000,0x80800000,
0x80000000,0x80000000,0x80800000,0x80800000,
},{
0x00000000,0x00000000,0x00000080,0x00000080,
0x00000000,0x00000000,0x00000080,0x00000080,
0x00008000,0x00008000,0x00008080,0x00008080,
0x00008000,0x00008000,0x00008080,0x00008080,
},
};
static const uint32_t fp_maskl[8][16] = {
{
0x00000000,0x40000000,0x00400000,0x40400000,
0x00004000,0x40004000,0x00404000,0x40404000,
0x00000040,0x40000040,0x00400040,0x40400040,
0x00004040,0x40004040,0x00404040,0x40404040,
},{
0x00000000,0x10000000,0x00100000,0x10100000,
0x00001000,0x10001000,0x00101000,0x10101000,
0x00000010,0x10000010,0x00100010,0x10100010,
0x00001010,0x10001010,0x00101010,0x10101010,
},{
0x00000000,0x04000000,0x00040000,0x04040000,
0x00000400,0x04000400,0x00040400,0x04040400,
0x00000004,0x04000004,0x00040004,0x04040004,
0x00000404,0x04000404,0x00040404,0x04040404,
},{
0x00000000,0x01000000,0x00010000,0x01010000,
0x00000100,0x01000100,0x00010100,0x01010100,
0x00000001,0x01000001,0x00010001,0x01010001,
0x00000101,0x01000101,0x00010101,0x01010101,
},{
0x00000000,0x80000000,0x00800000,0x80800000,
0x00008000,0x80008000,0x00808000,0x80808000,
0x00000080,0x80000080,0x00800080,0x80800080,
0x00008080,0x80008080,0x00808080,0x80808080,
},{
0x00000000,0x20000000,0x00200000,0x20200000,
0x00002000,0x20002000,0x00202000,0x20202000,
0x00000020,0x20000020,0x00200020,0x20200020,
0x00002020,0x20002020,0x00202020,0x20202020,
},{
0x00000000,0x08000000,0x00080000,0x08080000,
0x00000800,0x08000800,0x00080800,0x08080800,
0x00000008,0x08000008,0x00080008,0x08080008,
0x00000808,0x08000808,0x00080808,0x08080808,
},{
0x00000000,0x02000000,0x00020000,0x02020000,
0x00000200,0x02000200,0x00020200,0x02020200,
0x00000002,0x02000002,0x00020002,0x02020002,
0x00000202,0x02000202,0x00020202,0x02020202,
},
};
static const uint32_t fp_maskr[8][16] = {
{
0x00000000,0x40000000,0x00400000,0x40400000,
0x00004000,0x40004000,0x00404000,0x40404000,
0x00000040,0x40000040,0x00400040,0x40400040,
0x00004040,0x40004040,0x00404040,0x40404040,
},{
0x00000000,0x10000000,0x00100000,0x10100000,
0x00001000,0x10001000,0x00101000,0x10101000,
0x00000010,0x10000010,0x00100010,0x10100010,
0x00001010,0x10001010,0x00101010,0x10101010,
},{
0x00000000,0x04000000,0x00040000,0x04040000,
0x00000400,0x04000400,0x00040400,0x04040400,
0x00000004,0x04000004,0x00040004,0x04040004,
0x00000404,0x04000404,0x00040404,0x04040404,
},{
0x00000000,0x01000000,0x00010000,0x01010000,
0x00000100,0x01000100,0x00010100,0x01010100,
0x00000001,0x01000001,0x00010001,0x01010001,
0x00000101,0x01000101,0x00010101,0x01010101,
},{
0x00000000,0x80000000,0x00800000,0x80800000,
0x00008000,0x80008000,0x00808000,0x80808000,
0x00000080,0x80000080,0x00800080,0x80800080,
0x00008080,0x80008080,0x00808080,0x80808080,
},{
0x00000000,0x20000000,0x00200000,0x20200000,
0x00002000,0x20002000,0x00202000,0x20202000,
0x00000020,0x20000020,0x00200020,0x20200020,
0x00002020,0x20002020,0x00202020,0x20202020,
},{
0x00000000,0x08000000,0x00080000,0x08080000,
0x00000800,0x08000800,0x00080800,0x08080800,
0x00000008,0x08000008,0x00080008,0x08080008,
0x00000808,0x08000808,0x00080808,0x08080808,
},{
0x00000000,0x02000000,0x00020000,0x02020000,
0x00000200,0x02000200,0x00020200,0x02020200,
0x00000002,0x02000002,0x00020002,0x02020002,
0x00000202,0x02000202,0x00020202,0x02020202,
},
};
static const uint32_t key_perm_maskl[8][16] = {
{
0x00000000,0x00000000,0x00000010,0x00000010,
0x00001000,0x00001000,0x00001010,0x00001010,
0x00100000,0x00100000,0x00100010,0x00100010,
0x00101000,0x00101000,0x00101010,0x00101010,
},{
0x00000000,0x00000000,0x00000020,0x00000020,
0x00002000,0x00002000,0x00002020,0x00002020,
0x00200000,0x00200000,0x00200020,0x00200020,
0x00202000,0x00202000,0x00202020,0x00202020,
},{
0x00000000,0x00000000,0x00000040,0x00000040,
0x00004000,0x00004000,0x00004040,0x00004040,
0x00400000,0x00400000,0x00400040,0x00400040,
0x00404000,0x00404000,0x00404040,0x00404040,
},{
0x00000000,0x00000000,0x00000080,0x00000080,
0x00008000,0x00008000,0x00008080,0x00008080,
0x00800000,0x00800000,0x00800080,0x00800080,
0x00808000,0x00808000,0x00808080,0x00808080,
},{
0x00000000,0x00000001,0x00000100,0x00000101,
0x00010000,0x00010001,0x00010100,0x00010101,
0x01000000,0x01000001,0x01000100,0x01000101,
0x01010000,0x01010001,0x01010100,0x01010101,
},{
0x00000000,0x00000002,0x00000200,0x00000202,
0x00020000,0x00020002,0x00020200,0x00020202,
0x02000000,0x02000002,0x02000200,0x02000202,
0x02020000,0x02020002,0x02020200,0x02020202,
},{
0x00000000,0x00000004,0x00000400,0x00000404,
0x00040000,0x00040004,0x00040400,0x00040404,
0x04000000,0x04000004,0x04000400,0x04000404,
0x04040000,0x04040004,0x04040400,0x04040404,
},{
0x00000000,0x00000008,0x00000800,0x00000808,
0x00080000,0x00080008,0x00080800,0x00080808,
0x08000000,0x08000008,0x08000800,0x08000808,
0x08080000,0x08080008,0x08080800,0x08080808,
},
};
static const uint32_t key_perm_maskr[12][16] = {
{
0x00000000,0x00000001,0x00000000,0x00000001,
0x00000000,0x00000001,0x00000000,0x00000001,
0x00000000,0x00000001,0x00000000,0x00000001,
0x00000000,0x00000001,0x00000000,0x00000001,
},{
0x00000000,0x00000000,0x00100000,0x00100000,
0x00001000,0x00001000,0x00101000,0x00101000,
0x00000010,0x00000010,0x00100010,0x00100010,
0x00001010,0x00001010,0x00101010,0x00101010,
},{
0x00000000,0x00000002,0x00000000,0x00000002,
0x00000000,0x00000002,0x00000000,0x00000002,
0x00000000,0x00000002,0x00000000,0x00000002,
0x00000000,0x00000002,0x00000000,0x00000002,
},{
0x00000000,0x00000000,0x00200000,0x00200000,
0x00002000,0x00002000,0x00202000,0x00202000,
0x00000020,0x00000020,0x00200020,0x00200020,
0x00002020,0x00002020,0x00202020,0x00202020,
},{
0x00000000,0x00000004,0x00000000,0x00000004,
0x00000000,0x00000004,0x00000000,0x00000004,
0x00000000,0x00000004,0x00000000,0x00000004,
0x00000000,0x00000004,0x00000000,0x00000004,
},{
0x00000000,0x00000000,0x00400000,0x00400000,
0x00004000,0x00004000,0x00404000,0x00404000,
0x00000040,0x00000040,0x00400040,0x00400040,
0x00004040,0x00004040,0x00404040,0x00404040,
},{
0x00000000,0x00000008,0x00000000,0x00000008,
0x00000000,0x00000008,0x00000000,0x00000008,
0x00000000,0x00000008,0x00000000,0x00000008,
0x00000000,0x00000008,0x00000000,0x00000008,
},{
0x00000000,0x00000000,0x00800000,0x00800000,
0x00008000,0x00008000,0x00808000,0x00808000,
0x00000080,0x00000080,0x00800080,0x00800080,
0x00008080,0x00008080,0x00808080,0x00808080,
},{
0x00000000,0x00000000,0x01000000,0x01000000,
0x00010000,0x00010000,0x01010000,0x01010000,
0x00000100,0x00000100,0x01000100,0x01000100,
0x00010100,0x00010100,0x01010100,0x01010100,
},{
0x00000000,0x00000000,0x02000000,0x02000000,
0x00020000,0x00020000,0x02020000,0x02020000,
0x00000200,0x00000200,0x02000200,0x02000200,
0x00020200,0x00020200,0x02020200,0x02020200,
},{
0x00000000,0x00000000,0x04000000,0x04000000,
0x00040000,0x00040000,0x04040000,0x04040000,
0x00000400,0x00000400,0x04000400,0x04000400,
0x00040400,0x00040400,0x04040400,0x04040400,
},{
0x00000000,0x00000000,0x08000000,0x08000000,
0x00080000,0x00080000,0x08080000,0x08080000,
0x00000800,0x00000800,0x08000800,0x08000800,
0x00080800,0x00080800,0x08080800,0x08080800,
},
};
static const uint32_t comp_maskl0[4][8] = {
{
0x00000000,0x00020000,0x00000001,0x00020001,
0x00080000,0x000a0000,0x00080001,0x000a0001,
},{
0x00000000,0x00001000,0x00000000,0x00001000,
0x00000040,0x00001040,0x00000040,0x00001040,
},{
0x00000000,0x00400000,0x00000020,0x00400020,
0x00008000,0x00408000,0x00008020,0x00408020,
},{
0x00000000,0x00100000,0x00000800,0x00100800,
0x00000000,0x00100000,0x00000800,0x00100800,
},
};
static const uint32_t comp_maskr0[4][8] = {
{
0x00000000,0x00200000,0x00020000,0x00220000,
0x00000002,0x00200002,0x00020002,0x00220002,
},{
0x00000000,0x00000000,0x00100000,0x00100000,
0x00000004,0x00000004,0x00100004,0x00100004,
},{
0x00000000,0x00004000,0x00000800,0x00004800,
0x00000000,0x00004000,0x00000800,0x00004800,
},{
0x00000000,0x00400000,0x00008000,0x00408000,
0x00000008,0x00400008,0x00008008,0x00408008,
},
};
static const uint32_t comp_maskl1[4][16] = {
{
0x00000000,0x00000010,0x00004000,0x00004010,
0x00040000,0x00040010,0x00044000,0x00044010,
0x00000100,0x00000110,0x00004100,0x00004110,
0x00040100,0x00040110,0x00044100,0x00044110,
},{
0x00000000,0x00800000,0x00000002,0x00800002,
0x00000200,0x00800200,0x00000202,0x00800202,
0x00200000,0x00a00000,0x00200002,0x00a00002,
0x00200200,0x00a00200,0x00200202,0x00a00202,
},{
0x00000000,0x00002000,0x00000004,0x00002004,
0x00000400,0x00002400,0x00000404,0x00002404,
0x00000000,0x00002000,0x00000004,0x00002004,
0x00000400,0x00002400,0x00000404,0x00002404,
},{
0x00000000,0x00010000,0x00000008,0x00010008,
0x00000080,0x00010080,0x00000088,0x00010088,
0x00000000,0x00010000,0x00000008,0x00010008,
0x00000080,0x00010080,0x00000088,0x00010088,
},
};
static const uint32_t comp_maskr1[4][16] = {
{
0x00000000,0x00000000,0x00000080,0x00000080,
0x00002000,0x00002000,0x00002080,0x00002080,
0x00000001,0x00000001,0x00000081,0x00000081,
0x00002001,0x00002001,0x00002081,0x00002081,
},{
0x00000000,0x00000010,0x00800000,0x00800010,
0x00010000,0x00010010,0x00810000,0x00810010,
0x00000200,0x00000210,0x00800200,0x00800210,
0x00010200,0x00010210,0x00810200,0x00810210,
},{
0x00000000,0x00000400,0x00001000,0x00001400,
0x00080000,0x00080400,0x00081000,0x00081400,
0x00000020,0x00000420,0x00001020,0x00001420,
0x00080020,0x00080420,0x00081020,0x00081420,
},{
0x00000000,0x00000100,0x00040000,0x00040100,
0x00000000,0x00000100,0x00040000,0x00040100,
0x00000040,0x00000140,0x00040040,0x00040140,
0x00000040,0x00000140,0x00040040,0x00040140,
},
};
static const unsigned char ascii64[] =
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
/* 0000000000111111111122222222223333333333444444444455555555556666 */
/* 0123456789012345678901234567890123456789012345678901234567890123 */
/*
* We match the behavior of UFC-crypt on systems where "char" is signed by
* default (the majority), regardless of char's signedness on our system.
*/
static uint32_t ascii_to_bin(int ch)
{
int sch = (ch < 0x80) ? ch : -(0x100 - ch);
int retval;
retval = sch - '.';
if (sch >= 'A') {
retval = sch - ('A' - 12);
if (sch >= 'a')
retval = sch - ('a' - 38);
}
retval &= 0x3f;
return retval;
}
/*
* When we choose to "support" invalid salts, nevertheless disallow those
* containing characters that would violate the passwd file format.
*/
static inline int ascii_is_unsafe(unsigned char ch)
{
return !ch || ch == '\n' || ch == ':';
}
static uint32_t setup_salt(uint32_t salt)
{
uint32_t obit, saltbit, saltbits;
unsigned int i;
saltbits = 0;
saltbit = 1;
obit = 0x800000;
for (i = 0; i < 24; i++) {
if (salt & saltbit)
saltbits |= obit;
saltbit <<= 1;
obit >>= 1;
}
return saltbits;
}
void __des_setkey(const unsigned char *key, struct expanded_key *ekey)
{
uint32_t k0, k1, rawkey0, rawkey1;
unsigned int shifts, round, i, ibit;
rawkey0 =
(uint32_t)key[3] |
((uint32_t)key[2] << 8) |
((uint32_t)key[1] << 16) |
((uint32_t)key[0] << 24);
rawkey1 =
(uint32_t)key[7] |
((uint32_t)key[6] << 8) |
((uint32_t)key[5] << 16) |
((uint32_t)key[4] << 24);
/*
* Do key permutation and split into two 28-bit subkeys.
*/
k0 = k1 = 0;
for (i = 0, ibit = 28; i < 4; i++, ibit -= 4) {
unsigned int j = i << 1;
k0 |= key_perm_maskl[i][(rawkey0 >> ibit) & 0xf] |
key_perm_maskl[i + 4][(rawkey1 >> ibit) & 0xf];
k1 |= key_perm_maskr[j][(rawkey0 >> ibit) & 0xf];
ibit -= 4;
k1 |= key_perm_maskr[j + 1][(rawkey0 >> ibit) & 0xf] |
key_perm_maskr[i + 8][(rawkey1 >> ibit) & 0xf];
}
/*
* Rotate subkeys and do compression permutation.
*/
shifts = 0;
for (round = 0; round < 16; round++) {
uint32_t t0, t1;
uint32_t kl, kr;
shifts += key_shifts[round];
t0 = (k0 << shifts) | (k0 >> (28 - shifts));
t1 = (k1 << shifts) | (k1 >> (28 - shifts));
kl = kr = 0;
ibit = 25;
for (i = 0; i < 4; i++) {
kl |= comp_maskl0[i][(t0 >> ibit) & 7];
kr |= comp_maskr0[i][(t1 >> ibit) & 7];
ibit -= 4;
kl |= comp_maskl1[i][(t0 >> ibit) & 0xf];
kr |= comp_maskr1[i][(t1 >> ibit) & 0xf];
ibit -= 3;
}
ekey->l[round] = kl;
ekey->r[round] = kr;
}
}
/*
* l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
*/
void __do_des(uint32_t l_in, uint32_t r_in,
uint32_t *l_out, uint32_t *r_out,
uint32_t count, uint32_t saltbits, const struct expanded_key *ekey)
{
uint32_t l, r;
/*
* Do initial permutation (IP).
*/
l = r = 0;
if (l_in | r_in) {
unsigned int i, ibit;
for (i = 0, ibit = 28; i < 8; i++, ibit -= 4) {
l |= ip_maskl[i][(l_in >> ibit) & 0xf] |
ip_maskl[i + 8][(r_in >> ibit) & 0xf];
r |= ip_maskr[i][(l_in >> ibit) & 0xf] |
ip_maskr[i + 8][(r_in >> ibit) & 0xf];
}
}
while (count--) {
/*
* Do each round.
*/
unsigned int round = 16;
const uint32_t *kl = ekey->l;
const uint32_t *kr = ekey->r;
uint32_t f = 0;
while (round--) {
uint32_t r48l, r48r;
/*
* Expand R to 48 bits (simulate the E-box).
*/
r48l = ((r & 0x00000001) << 23)
| ((r & 0xf8000000) >> 9)
| ((r & 0x1f800000) >> 11)
| ((r & 0x01f80000) >> 13)
| ((r & 0x001f8000) >> 15);
r48r = ((r & 0x0001f800) << 7)
| ((r & 0x00001f80) << 5)
| ((r & 0x000001f8) << 3)
| ((r & 0x0000001f) << 1)
| ((r & 0x80000000) >> 31);
/*
* Do salting for crypt() and friends, and
* XOR with the permuted key.
*/
f = (r48l ^ r48r) & saltbits;
r48l ^= f ^ *kl++;
r48r ^= f ^ *kr++;
/*
* Do S-box lookups (which shrink it back to 32 bits)
* and do the P-box permutation at the same time.
*/
f = psbox[0][r48l >> 18]
| psbox[1][(r48l >> 12) & 0x3f]
| psbox[2][(r48l >> 6) & 0x3f]
| psbox[3][r48l & 0x3f]
| psbox[4][r48r >> 18]
| psbox[5][(r48r >> 12) & 0x3f]
| psbox[6][(r48r >> 6) & 0x3f]
| psbox[7][r48r & 0x3f];
/*
* Now that we've permuted things, complete f().
*/
f ^= l;
l = r;
r = f;
}
r = l;
l = f;
}
/*
* Do final permutation (inverse of IP).
*/
{
unsigned int i, ibit;
uint32_t lo, ro;
lo = ro = 0;
for (i = 0, ibit = 28; i < 4; i++, ibit -= 4) {
ro |= fp_maskr[i][(l >> ibit) & 0xf] |
fp_maskr[i + 4][(r >> ibit) & 0xf];
ibit -= 4;
lo |= fp_maskl[i][(l >> ibit) & 0xf] |
fp_maskl[i + 4][(r >> ibit) & 0xf];
}
*l_out = lo;
*r_out = ro;
}
}
static void des_cipher(const unsigned char *in, unsigned char *out,
uint32_t count, uint32_t saltbits, const struct expanded_key *ekey)
{
uint32_t l_out, r_out, rawl, rawr;
rawl =
(uint32_t)in[3] |
((uint32_t)in[2] << 8) |
((uint32_t)in[1] << 16) |
((uint32_t)in[0] << 24);
rawr =
(uint32_t)in[7] |
((uint32_t)in[6] << 8) |
((uint32_t)in[5] << 16) |
((uint32_t)in[4] << 24);
__do_des(rawl, rawr, &l_out, &r_out, count, saltbits, ekey);
out[0] = l_out >> 24;
out[1] = l_out >> 16;
out[2] = l_out >> 8;
out[3] = l_out;
out[4] = r_out >> 24;
out[5] = r_out >> 16;
out[6] = r_out >> 8;
out[7] = r_out;
}
static char *_crypt_extended_r_uut(const char *_key, const char *_setting, char *output)
{
const unsigned char *key = (const unsigned char *)_key;
const unsigned char *setting = (const unsigned char *)_setting;
struct expanded_key ekey;
unsigned char keybuf[8];
unsigned char *p, *q;
uint32_t count, salt, l, r0, r1;
unsigned int i;
/*
* Copy the key, shifting each character left by one bit and padding
* with zeroes.
*/
q = keybuf;
while (q <= &keybuf[sizeof(keybuf) - 1]) {
*q++ = *key << 1;
if (*key)
key++;
}
__des_setkey(keybuf, &ekey);
if (*setting == _PASSWORD_EFMT1) {
/*
* "new"-style:
* setting - underscore, 4 chars of count, 4 chars of salt
* key - unlimited characters
*/
for (i = 1, count = 0; i < 5; i++) {
uint32_t value = ascii_to_bin(setting[i]);
if (ascii64[value] != setting[i])
return NULL;
count |= value << (i - 1) * 6;
}
if (!count)
return NULL;
for (i = 5, salt = 0; i < 9; i++) {
uint32_t value = ascii_to_bin(setting[i]);
if (ascii64[value] != setting[i])
return NULL;
salt |= value << (i - 5) * 6;
}
while (*key) {
/*
* Encrypt the key with itself.
*/
des_cipher(keybuf, keybuf, 1, 0, &ekey);
/*
* And XOR with the next 8 characters of the key.
*/
q = keybuf;
while (q <= &keybuf[sizeof(keybuf) - 1] && *key)
*q++ ^= *key++ << 1;
__des_setkey(keybuf, &ekey);
}
memcpy(output, setting, 9);
output[9] = '\0';
p = (unsigned char *)output + 9;
} else {
/*
* "old"-style:
* setting - 2 chars of salt
* key - up to 8 characters
*/
count = 25;
if (ascii_is_unsafe(setting[0]) || ascii_is_unsafe(setting[1]))
return NULL;
salt = (ascii_to_bin(setting[1]) << 6)
| ascii_to_bin(setting[0]);
output[0] = setting[0];
output[1] = setting[1];
p = (unsigned char *)output + 2;
}
/*
* Do it.
*/
__do_des(0, 0, &r0, &r1, count, setup_salt(salt), &ekey);
/*
* Now encode the result...
*/
l = (r0 >> 8);
*p++ = ascii64[(l >> 18) & 0x3f];
*p++ = ascii64[(l >> 12) & 0x3f];
*p++ = ascii64[(l >> 6) & 0x3f];
*p++ = ascii64[l & 0x3f];
l = (r0 << 16) | ((r1 >> 16) & 0xffff);
*p++ = ascii64[(l >> 18) & 0x3f];
*p++ = ascii64[(l >> 12) & 0x3f];
*p++ = ascii64[(l >> 6) & 0x3f];
*p++ = ascii64[l & 0x3f];
l = r1 << 2;
*p++ = ascii64[(l >> 12) & 0x3f];
*p++ = ascii64[(l >> 6) & 0x3f];
*p++ = ascii64[l & 0x3f];
*p = 0;
return output;
}
char *__crypt_des(const char *key, const char *setting, char *output)
{
const char *test_key = "\x80\xff\x80\x01 "
"\x7f\x81\x80\x80\x0d\x0a\xff\x7f \x81 test";
const char *test_setting = "_0.../9Zz";
const char *test_hash = "_0.../9ZzX7iSJNd21sU";
char test_buf[21];
char *retval;
const char *p;
if (*setting != _PASSWORD_EFMT1) {
test_setting = "\x80x";
test_hash = "\x80x22/wK52ZKGA";
}
/*
* Hash the supplied password.
*/
retval = _crypt_extended_r_uut(key, setting, output);
/*
* Perform a quick self-test. It is important that we make both calls
* to _crypt_extended_r_uut() from the same scope such that they likely
* use the same stack locations, which makes the second call overwrite
* the first call's sensitive data on the stack and makes it more
* likely that any alignment related issues would be detected.
*/
p = _crypt_extended_r_uut(test_key, test_setting, test_buf);
if (p && !strcmp(p, test_hash) && retval)
return retval;
return (setting[0]=='*') ? "x" : "*";
}
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