diff options
Diffstat (limited to 'src/crypt/crypt_des.c')
| -rw-r--r-- | src/crypt/crypt_des.c | 1021 |
1 files changed, 1021 insertions, 0 deletions
diff --git a/src/crypt/crypt_des.c b/src/crypt/crypt_des.c new file mode 100644 index 0000000..d7b2b15 --- /dev/null +++ b/src/crypt/crypt_des.c @@ -0,0 +1,1021 @@ +/* + * 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. + */ + +#include <stdint.h> +#include <string.h> + +struct expanded_key { + uint32_t l[16], r[16]; +}; + +#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; +} + +static 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. + */ +static 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; + 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; + union { + unsigned char c[8]; + uint32_t i[2]; + } keybuf; + 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.c; + while (q <= &keybuf.c[sizeof(keybuf.c) - 1]) { + *q++ = *key << 1; + if (*key) + key++; + } + des_setkey(keybuf.c, &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 || count > 262143) + 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.c, keybuf.c, 1, 0, &ekey); + /* + * And XOR with the next 8 characters of the key. + */ + q = keybuf.c; + while (q <= &keybuf.c[sizeof(keybuf.c) - 1] && *key) + *q++ ^= *key++ << 1; + des_setkey(keybuf.c, &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" : "*"; +} |