From 0f8c9bfd5d7421a99c53e6aced7f31e2b4c9f366 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Janosch=20Gr=C3=A4f?= Date: Mon, 15 Dec 2008 23:03:06 +0100 Subject: [PATCH] +libcrypt --- apps/include/crypt.h | 35 ++ apps/lib/Makefile | 8 +- apps/lib/libcrypt/Makefile | 8 + apps/lib/libcrypt/crypt.c | 21 ++ apps/lib/libcrypt/crypt_stub.c | 30 ++ apps/lib/libcrypt/des.c | 740 +++++++++++++++++++++++++++++++++++++++++ apps/lib/libcrypt/libcrypt.h | 20 ++ apps/lib/libcrypt/md5.c | 635 +++++++++++++++++++++++++++++++++++ 8 files changed, 1495 insertions(+), 2 deletions(-) create mode 100644 apps/include/crypt.h create mode 100644 apps/lib/libcrypt/Makefile create mode 100644 apps/lib/libcrypt/crypt.c create mode 100644 apps/lib/libcrypt/crypt_stub.c create mode 100644 apps/lib/libcrypt/des.c create mode 100644 apps/lib/libcrypt/libcrypt.h create mode 100644 apps/lib/libcrypt/md5.c diff --git a/apps/include/crypt.h b/apps/include/crypt.h new file mode 100644 index 0000000..5c3b364 --- /dev/null +++ b/apps/include/crypt.h @@ -0,0 +1,35 @@ +/* + * crypt(3) implementation for uClibc + * + * The uClibc Library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * The GNU C Library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with the GNU C Library; if not, write to the Free + * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307 USA. + * + */ + +#ifndef _CRYPT_H +#define _CRYPT_H 1 + +/* Encrypt characters from KEY using salt to perturb the encryption method. + * If salt begins with "$1$", MD5 hashing is used instead of DES. */ +extern char *crypt (const char *__key, const char *__salt); + +/* Setup DES tables according KEY. */ +extern void setkey (const char *__key); + +/* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt + block in place. */ +extern void encrypt (char *__block, int __edflag); + +#endif /* crypt.h */ diff --git a/apps/lib/Makefile b/apps/lib/Makefile index 48fa9fb..4c8c291 100644 --- a/apps/lib/Makefile +++ b/apps/lib/Makefile @@ -7,10 +7,12 @@ all: make -C libfuse make -C zlib make -C readline + make -C libavl + make -C libcrypt make -C crt0 - cp libc.a libcdi.a libfuse.a libz.a libreadline.a crt0.o $(GCC_TOOLCHAIN)/lib/ + cp libc.a libcdi.a libfuse.a libz.a libreadline.a libavl.a libcrypt.a crt0.o $(GCC_TOOLCHAIN)/lib/ # HACK! # puts libmeinos and libc together ar qs $(GCC_TOOLCHAIN)/lib/libc.a ../../lib/libmeinos/*.o @@ -23,6 +25,8 @@ clean: make -C libfuse clean make -C zlib clean make -C readline clean + make -C libavl clean + make -C libcrypt clean make -C crt0 clean - rm -f libc.a libmeinos.a libcdi.a libfuse.a libz.a libreadline.a crt0.o \ No newline at end of file + rm -f libc.a libmeinos.a libcdi.a libfuse.a libz.a libreadline.a libavl.a libcrypt.a crt0.o \ No newline at end of file diff --git a/apps/lib/libcrypt/Makefile b/apps/lib/libcrypt/Makefile new file mode 100644 index 0000000..d2ff024 --- /dev/null +++ b/apps/lib/libcrypt/Makefile @@ -0,0 +1,8 @@ +-include ../../../Makefile.config + +all: + $(LIBS_CC) -c *.c $(LIBS_CFLAGS) + $(LIBS_AR) rs ../libcrypt.a *.o + +clean: + rm -f *.o diff --git a/apps/lib/libcrypt/crypt.c b/apps/lib/libcrypt/crypt.c new file mode 100644 index 0000000..8b361d3 --- /dev/null +++ b/apps/lib/libcrypt/crypt.c @@ -0,0 +1,21 @@ +/* vi: set sw=4 ts=4: */ +/* + * crypt() for uClibc + * Copyright (C) 2000-2006 by Erik Andersen + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ + +#define __FORCE_GLIBC +#include +#include +#include "libcrypt.h" + +char *crypt(const char *key, const char *salt) +{ + /* First, check if we are supposed to be using the MD5 replacement + * instead of DES... */ + if (salt[0]=='$' && salt[1]=='1' && salt[2]=='$') + return __md5_crypt((unsigned char*)key, (unsigned char*)salt); + else + return __des_crypt((unsigned char*)key, (unsigned char*)salt); +} diff --git a/apps/lib/libcrypt/crypt_stub.c b/apps/lib/libcrypt/crypt_stub.c new file mode 100644 index 0000000..b024cb2 --- /dev/null +++ b/apps/lib/libcrypt/crypt_stub.c @@ -0,0 +1,30 @@ +/* vi: set sw=4 ts=4: */ +/* + * crypt() for uClibc + * Copyright (C) 2008 by Erik Andersen + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ + +#define __FORCE_GLIBC +#include +#include +#include "libcrypt.h" +#include + +char *crypt(const char *key, const char *salt) +{ + errno = ENOSYS; + return NULL; +} + +void +setkey(const char *key) +{ + errno = ENOSYS; +} + +void +encrypt(char *block, int flag) +{ + errno = ENOSYS; +} diff --git a/apps/lib/libcrypt/des.c b/apps/lib/libcrypt/des.c new file mode 100644 index 0000000..4b7e167 --- /dev/null +++ b/apps/lib/libcrypt/des.c @@ -0,0 +1,740 @@ +/* + * FreeSec: libcrypt for NetBSD + * + * Copyright (c) 1994 David Burren + * All rights reserved. + * + * Adapted for FreeBSD-2.0 by Geoffrey M. Rehmet + * this file should now *only* export crypt(), in order to make + * binaries of libcrypt exportable from the USA + * + * Adapted for FreeBSD-4.0 by Mark R V Murray + * this file should now *only* export crypt_des(), in order to make + * a module that can be optionally included in libcrypt. + * + * 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. + * + * This is an original implementation of the DES and the crypt(3) interfaces + * by David Burren . + * + * An excellent reference on the underlying algorithm (and related + * algorithms) is: + * + * B. Schneier, Applied Cryptography: protocols, algorithms, + * and source code in C, John Wiley & Sons, 1994. + * + * Note that in that book's description of DES the lookups for the initial, + * pbox, and final permutations are inverted (this has been brought to the + * attention of the author). A list of errata for this book has been + * posted to the sci.crypt newsgroup by the author and is available for FTP. + * + * ARCHITECTURE ASSUMPTIONS: + * It is assumed that the 8-byte arrays passed by reference can be + * addressed as arrays of uint32_t's (ie. the CPU is not picky about + * alignment). + */ + +#define __FORCE_GLIBC +#include +#include +#include +#include +#include +#include +#include +#include +#include "libcrypt.h" + +/* Re-entrantify me -- all this junk needs to be in + * struct crypt_data to make this really reentrant... */ +static unsigned char inv_key_perm[64]; +static unsigned char inv_comp_perm[56]; +static unsigned char un_pbox[32]; +static uint32_t en_keysl[16], en_keysr[16]; +static uint32_t de_keysl[16], de_keysr[16]; +static uint32_t ip_maskl[8][256], ip_maskr[8][256]; +static uint32_t fp_maskl[8][256], fp_maskr[8][256]; +static uint32_t key_perm_maskl[8][128], key_perm_maskr[8][128]; +static uint32_t comp_maskl[8][128], comp_maskr[8][128]; +static uint32_t saltbits; +static uint32_t old_salt; +static uint32_t old_rawkey0, old_rawkey1; + + +/* Static stuff that stays resident and doesn't change after + * being initialized, and therefore doesn't need to be made + * reentrant. */ +static unsigned char init_perm[64], final_perm[64]; +static unsigned char m_sbox[4][4096]; +static uint32_t psbox[4][256]; + + + + +/* A pile of data */ +static const unsigned char ascii64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; + +static const unsigned char IP[64] = { + 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, + 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, + 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, + 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7 +}; + +static const unsigned char key_perm[56] = { + 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, + 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36, + 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22, + 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4 +}; + +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 unsigned char comp_perm[48] = { + 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, + 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2, + 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, + 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32 +}; + +/* + * No E box is used, as it's replaced by some ANDs, shifts, and ORs. + */ + +static const unsigned char sbox[8][64] = { + { + 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7, + 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8, + 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0, + 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 + }, + { + 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10, + 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5, + 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15, + 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 + }, + { + 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8, + 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1, + 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7, + 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 + }, + { + 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15, + 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9, + 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4, + 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 + }, + { + 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9, + 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6, + 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14, + 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 + }, + { + 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11, + 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8, + 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6, + 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 + }, + { + 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1, + 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6, + 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2, + 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 + }, + { + 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7, + 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2, + 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8, + 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 + } +}; + +static const unsigned char pbox[32] = { + 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, + 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 +}; + +static const uint32_t bits32[32] = +{ + 0x80000000, 0x40000000, 0x20000000, 0x10000000, + 0x08000000, 0x04000000, 0x02000000, 0x01000000, + 0x00800000, 0x00400000, 0x00200000, 0x00100000, + 0x00080000, 0x00040000, 0x00020000, 0x00010000, + 0x00008000, 0x00004000, 0x00002000, 0x00001000, + 0x00000800, 0x00000400, 0x00000200, 0x00000100, + 0x00000080, 0x00000040, 0x00000020, 0x00000010, + 0x00000008, 0x00000004, 0x00000002, 0x00000001 +}; + +static const unsigned char bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }; + + +static int +ascii_to_bin(char ch) +{ + if (ch > 'z') + return(0); + if (ch >= 'a') + return(ch - 'a' + 38); + if (ch > 'Z') + return(0); + if (ch >= 'A') + return(ch - 'A' + 12); + if (ch > '9') + return(0); + if (ch >= '.') + return(ch - '.'); + return(0); +} + +static void +des_init(void) +{ + static int des_initialised = 0; + + int i, j, b, k, inbit, obit; + uint32_t *p, *il, *ir, *fl, *fr; + const uint32_t *bits28, *bits24; + unsigned char u_sbox[8][64]; + + if (des_initialised==1) + return; + + old_rawkey0 = old_rawkey1 = 0L; + saltbits = 0L; + old_salt = 0L; + bits24 = (bits28 = bits32 + 4) + 4; + + /* + * Invert the S-boxes, reordering the input bits. + */ + for (i = 0; i < 8; i++) + for (j = 0; j < 64; j++) { + b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf); + u_sbox[i][j] = sbox[i][b]; + } + + /* + * Convert the inverted S-boxes into 4 arrays of 8 bits. + * Each will handle 12 bits of the S-box input. + */ + for (b = 0; b < 4; b++) + for (i = 0; i < 64; i++) + for (j = 0; j < 64; j++) + m_sbox[b][(i << 6) | j] = + (unsigned char)((u_sbox[(b << 1)][i] << 4) | + u_sbox[(b << 1) + 1][j]); + + /* + * Set up the initial & final permutations into a useful form, and + * initialise the inverted key permutation. + */ + for (i = 0; i < 64; i++) { + init_perm[final_perm[i] = IP[i] - 1] = (unsigned char)i; + inv_key_perm[i] = 255; + } + + /* + * Invert the key permutation and initialise the inverted key + * compression permutation. + */ + for (i = 0; i < 56; i++) { + inv_key_perm[key_perm[i] - 1] = (unsigned char)i; + inv_comp_perm[i] = 255; + } + + /* + * Invert the key compression permutation. + */ + for (i = 0; i < 48; i++) { + inv_comp_perm[comp_perm[i] - 1] = (unsigned char)i; + } + + /* + * Set up the OR-mask arrays for the initial and final permutations, + * and for the key initial and compression permutations. + */ + for (k = 0; k < 8; k++) { + for (i = 0; i < 256; i++) { + *(il = &ip_maskl[k][i]) = 0L; + *(ir = &ip_maskr[k][i]) = 0L; + *(fl = &fp_maskl[k][i]) = 0L; + *(fr = &fp_maskr[k][i]) = 0L; + for (j = 0; j < 8; j++) { + inbit = 8 * k + j; + if (i & bits8[j]) { + if ((obit = init_perm[inbit]) < 32) + *il |= bits32[obit]; + else + *ir |= bits32[obit-32]; + if ((obit = final_perm[inbit]) < 32) + *fl |= bits32[obit]; + else + *fr |= bits32[obit - 32]; + } + } + } + for (i = 0; i < 128; i++) { + *(il = &key_perm_maskl[k][i]) = 0L; + *(ir = &key_perm_maskr[k][i]) = 0L; + for (j = 0; j < 7; j++) { + inbit = 8 * k + j; + if (i & bits8[j + 1]) { + if ((obit = inv_key_perm[inbit]) == 255) + continue; + if (obit < 28) + *il |= bits28[obit]; + else + *ir |= bits28[obit - 28]; + } + } + *(il = &comp_maskl[k][i]) = 0L; + *(ir = &comp_maskr[k][i]) = 0L; + for (j = 0; j < 7; j++) { + inbit = 7 * k + j; + if (i & bits8[j + 1]) { + if ((obit=inv_comp_perm[inbit]) == 255) + continue; + if (obit < 24) + *il |= bits24[obit]; + else + *ir |= bits24[obit - 24]; + } + } + } + } + + /* + * Invert the P-box permutation, and convert into OR-masks for + * handling the output of the S-box arrays setup above. + */ + for (i = 0; i < 32; i++) + un_pbox[pbox[i] - 1] = (unsigned char)i; + + for (b = 0; b < 4; b++) + for (i = 0; i < 256; i++) { + *(p = &psbox[b][i]) = 0L; + for (j = 0; j < 8; j++) { + if (i & bits8[j]) + *p |= bits32[un_pbox[8 * b + j]]; + } + } + + des_initialised = 1; +} + + +static void +setup_salt(uint32_t salt) +{ + uint32_t obit, saltbit; + int i; + + if (salt == old_salt) + return; + old_salt = salt; + + saltbits = 0L; + saltbit = 1; + obit = 0x800000; + for (i = 0; i < 24; i++) { + if (salt & saltbit) + saltbits |= obit; + saltbit <<= 1; + obit >>= 1; + } +} + + +static void +des_setkey(const char *key) +{ + uint32_t k0, k1, rawkey0, rawkey1; + int shifts, round; + + des_init(); + + rawkey0 = ntohl(*(const uint32_t *) key); + rawkey1 = ntohl(*(const uint32_t *) (key + 4)); + + if ((rawkey0 | rawkey1) + && rawkey0 == old_rawkey0 + && rawkey1 == old_rawkey1) { + /* + * Already setup for this key. + * This optimisation fails on a zero key (which is weak and + * has bad parity anyway) in order to simplify the starting + * conditions. + */ + return; + } + old_rawkey0 = rawkey0; + old_rawkey1 = rawkey1; + + /* + * Do key permutation and split into two 28-bit subkeys. + */ + k0 = key_perm_maskl[0][rawkey0 >> 25] + | key_perm_maskl[1][(rawkey0 >> 17) & 0x7f] + | key_perm_maskl[2][(rawkey0 >> 9) & 0x7f] + | key_perm_maskl[3][(rawkey0 >> 1) & 0x7f] + | key_perm_maskl[4][rawkey1 >> 25] + | key_perm_maskl[5][(rawkey1 >> 17) & 0x7f] + | key_perm_maskl[6][(rawkey1 >> 9) & 0x7f] + | key_perm_maskl[7][(rawkey1 >> 1) & 0x7f]; + k1 = key_perm_maskr[0][rawkey0 >> 25] + | key_perm_maskr[1][(rawkey0 >> 17) & 0x7f] + | key_perm_maskr[2][(rawkey0 >> 9) & 0x7f] + | key_perm_maskr[3][(rawkey0 >> 1) & 0x7f] + | key_perm_maskr[4][rawkey1 >> 25] + | key_perm_maskr[5][(rawkey1 >> 17) & 0x7f] + | key_perm_maskr[6][(rawkey1 >> 9) & 0x7f] + | key_perm_maskr[7][(rawkey1 >> 1) & 0x7f]; + /* + * Rotate subkeys and do compression permutation. + */ + shifts = 0; + for (round = 0; round < 16; round++) { + uint32_t t0, t1; + + shifts += key_shifts[round]; + + t0 = (k0 << shifts) | (k0 >> (28 - shifts)); + t1 = (k1 << shifts) | (k1 >> (28 - shifts)); + + de_keysl[15 - round] = + en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f] + | comp_maskl[1][(t0 >> 14) & 0x7f] + | comp_maskl[2][(t0 >> 7) & 0x7f] + | comp_maskl[3][t0 & 0x7f] + | comp_maskl[4][(t1 >> 21) & 0x7f] + | comp_maskl[5][(t1 >> 14) & 0x7f] + | comp_maskl[6][(t1 >> 7) & 0x7f] + | comp_maskl[7][t1 & 0x7f]; + + de_keysr[15 - round] = + en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f] + | comp_maskr[1][(t0 >> 14) & 0x7f] + | comp_maskr[2][(t0 >> 7) & 0x7f] + | comp_maskr[3][t0 & 0x7f] + | comp_maskr[4][(t1 >> 21) & 0x7f] + | comp_maskr[5][(t1 >> 14) & 0x7f] + | comp_maskr[6][(t1 >> 7) & 0x7f] + | comp_maskr[7][t1 & 0x7f]; + } +} + + +static int +do_des( uint32_t l_in, uint32_t r_in, uint32_t *l_out, uint32_t *r_out, int count) +{ + /* l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format. */ + uint32_t l, r, *kl, *kr, *kl1, *kr1; + uint32_t f, r48l, r48r; + int round; + + if (count == 0) { + return 1; + } + if (count > 0) { + /* Encrypting */ + kl1 = en_keysl; + kr1 = en_keysr; + } else { + /* Decrypting */ + count = -count; + kl1 = de_keysl; + kr1 = de_keysr; + } + + /* Do initial permutation (IP). */ + l = ip_maskl[0][l_in >> 24] + | ip_maskl[1][(l_in >> 16) & 0xff] + | ip_maskl[2][(l_in >> 8) & 0xff] + | ip_maskl[3][l_in & 0xff] + | ip_maskl[4][r_in >> 24] + | ip_maskl[5][(r_in >> 16) & 0xff] + | ip_maskl[6][(r_in >> 8) & 0xff] + | ip_maskl[7][r_in & 0xff]; + r = ip_maskr[0][l_in >> 24] + | ip_maskr[1][(l_in >> 16) & 0xff] + | ip_maskr[2][(l_in >> 8) & 0xff] + | ip_maskr[3][l_in & 0xff] + | ip_maskr[4][r_in >> 24] + | ip_maskr[5][(r_in >> 16) & 0xff] + | ip_maskr[6][(r_in >> 8) & 0xff] + | ip_maskr[7][r_in & 0xff]; + + while (count--) { + /* Do each round. */ + kl = kl1; + kr = kr1; + round = 16; + do { + /* 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 sbox lookups (which shrink it back to 32 bits) + * and do the pbox permutation at the same time. + */ + f = psbox[0][m_sbox[0][r48l >> 12]] + | psbox[1][m_sbox[1][r48l & 0xfff]] + | psbox[2][m_sbox[2][r48r >> 12]] + | psbox[3][m_sbox[3][r48r & 0xfff]]; + /* Now that we've permuted things, complete f(). */ + f ^= l; + l = r; + r = f; + } while (--round); + r = l; + l = f; + } + /* Do final permutation (inverse of IP). */ + *l_out = fp_maskl[0][l >> 24] + | fp_maskl[1][(l >> 16) & 0xff] + | fp_maskl[2][(l >> 8) & 0xff] + | fp_maskl[3][l & 0xff] + | fp_maskl[4][r >> 24] + | fp_maskl[5][(r >> 16) & 0xff] + | fp_maskl[6][(r >> 8) & 0xff] + | fp_maskl[7][r & 0xff]; + *r_out = fp_maskr[0][l >> 24] + | fp_maskr[1][(l >> 16) & 0xff] + | fp_maskr[2][(l >> 8) & 0xff] + | fp_maskr[3][l & 0xff] + | fp_maskr[4][r >> 24] + | fp_maskr[5][(r >> 16) & 0xff] + | fp_maskr[6][(r >> 8) & 0xff] + | fp_maskr[7][r & 0xff]; + return(0); +} + + +#if 0 +static int +des_cipher(const char *in, char *out, uint32_t salt, int count) +{ + uint32_t l_out, r_out, rawl, rawr; + int retval; + union { + uint32_t *ui32; + const char *c; + } trans; + + des_init(); + + setup_salt(salt); + + trans.c = in; + rawl = ntohl(*trans.ui32++); + rawr = ntohl(*trans.ui32); + + retval = do_des(rawl, rawr, &l_out, &r_out, count); + + trans.c = out; + *trans.ui32++ = htonl(l_out); + *trans.ui32 = htonl(r_out); + return(retval); +} +#endif + + +void +setkey(const char *key) +{ + int i, j; + uint32_t packed_keys[2]; + unsigned char *p; + + p = (unsigned char *) packed_keys; + + for (i = 0; i < 8; i++) { + p[i] = 0; + for (j = 0; j < 8; j++) + if (*key++ & 1) + p[i] |= bits8[j]; + } + des_setkey((char *)p); +} + + +void +encrypt(char *block, int flag) +{ + uint32_t io[2]; + unsigned char *p; + int i, j; + + des_init(); + + setup_salt(0L); + p = (unsigned char*)block; + for (i = 0; i < 2; i++) { + io[i] = 0L; + for (j = 0; j < 32; j++) + if (*p++ & 1) + io[i] |= bits32[j]; + } + do_des(io[0], io[1], io, io + 1, flag ? -1 : 1); + for (i = 0; i < 2; i++) + for (j = 0; j < 32; j++) + block[(i << 5) | j] = (io[i] & bits32[j]) ? 1 : 0; +} + +char *__des_crypt(const unsigned char *key, const unsigned char *setting) +{ + uint32_t count, salt, l, r0, r1, keybuf[2]; + unsigned char *p, *q; + static char output[21]; + + des_init(); + + /* + * Copy the key, shifting each character up by one bit + * and padding with zeros. + */ + q = (unsigned char *)keybuf; + while (q - (unsigned char *)keybuf - 8) { + *q++ = *key << 1; + if (*(q - 1)) + key++; + } + des_setkey((char *)keybuf); + +#if 0 + if (*setting == _PASSWORD_EFMT1) { + int i; + /* + * "new"-style: + * setting - underscore, 4 bytes of count, 4 bytes of salt + * key - unlimited characters + */ + for (i = 1, count = 0L; i < 5; i++) + count |= ascii_to_bin(setting[i]) << ((i - 1) * 6); + + for (i = 5, salt = 0L; i < 9; i++) + salt |= ascii_to_bin(setting[i]) << ((i - 5) * 6); + + while (*key) { + /* + * Encrypt the key with itself. + */ + if (des_cipher((char *)keybuf, (char *)keybuf, 0L, 1)) + return(NULL); + /* + * And XOR with the next 8 characters of the key. + */ + q = (unsigned char *)keybuf; + while (q - (unsigned char *)keybuf - 8 && *key) + *q++ ^= *key++ << 1; + + des_setkey((char *)keybuf); + } + strncpy(output, setting, 9); + + /* + * Double check that we weren't given a short setting. + * If we were, the above code will probably have created + * wierd values for count and salt, but we don't really care. + * Just make sure the output string doesn't have an extra + * NUL in it. + */ + output[9] = '\0'; + p = (unsigned char *)output + strlen(output); + } else +#endif + { + /* + * "old"-style: + * setting - 2 bytes of salt + * key - up to 8 characters + */ + count = 25; + + salt = (ascii_to_bin(setting[1]) << 6) + | ascii_to_bin(setting[0]); + + output[0] = setting[0]; + /* + * If the encrypted password that the salt was extracted from + * is only 1 character long, the salt will be corrupted. We + * need to ensure that the output string doesn't have an extra + * NUL in it! + */ + output[1] = setting[1] ? setting[1] : output[0]; + + p = (unsigned char *)output + 2; + } + setup_salt(salt); + /* + * Do it. + */ + if (do_des(0L, 0L, &r0, &r1, (int)count)) + return(NULL); + /* + * 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); +} + diff --git a/apps/lib/libcrypt/libcrypt.h b/apps/lib/libcrypt/libcrypt.h new file mode 100644 index 0000000..4932ef9 --- /dev/null +++ b/apps/lib/libcrypt/libcrypt.h @@ -0,0 +1,20 @@ +/* prototypes for internal crypt functions + * + * Copyright (C) 2000-2006 by Erik Andersen + * + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ + +#ifndef __LIBCRYPT_H__ +#define __LIBCRYPT_H__ + +extern char *__md5_crypt(const unsigned char *pw, const unsigned char *salt); +extern char *__des_crypt(const unsigned char *pw, const unsigned char *salt); + +/* shut up gcc-4.x signed warnings */ +#define strcpy(dst,src) strcpy((char*)dst,(char*)src) +#define strlen(s) strlen((char*)s) +#define strncat(dst,src,n) strncat((char*)dst,(char*)src,n) +#define strncmp(s1,s2,n) strncmp((char*)s1,(char*)s2,n) + +#endif diff --git a/apps/lib/libcrypt/md5.c b/apps/lib/libcrypt/md5.c new file mode 100644 index 0000000..ac1e753 --- /dev/null +++ b/apps/lib/libcrypt/md5.c @@ -0,0 +1,635 @@ +/* + * MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm + * + * Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All + * rights reserved. + * + * License to copy and use this software is granted provided that it + * is identified as the "RSA Data Security, Inc. MD5 Message-Digest + * Algorithm" in all material mentioning or referencing this software + * or this function. + * + * License is also granted to make and use derivative works provided + * that such works are identified as "derived from the RSA Data + * Security, Inc. MD5 Message-Digest Algorithm" in all material + * mentioning or referencing the derived work. + * + * RSA Data Security, Inc. makes no representations concerning either + * the merchantability of this software or the suitability of this + * software for any particular purpose. It is provided "as is" + * without express or implied warranty of any kind. + * + * These notices must be retained in any copies of any part of this + * documentation and/or software. + * + * $FreeBSD: src/lib/libmd/md5c.c,v 1.9.2.1 1999/08/29 14:57:12 peter Exp $ + * + * This code is the same as the code published by RSA Inc. It has been + * edited for clarity and style only. + * + * ---------------------------------------------------------------------------- + * The md5_crypt() function was taken from freeBSD's libcrypt and contains + * this license: + * "THE BEER-WARE LICENSE" (Revision 42): + * wrote this file. As long as you retain this notice you + * can do whatever you want with this stuff. If we meet some day, and you think + * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp + * + * $FreeBSD: src/lib/libcrypt/crypt.c,v 1.7.2.1 1999/08/29 14:56:33 peter Exp $ + * + * ---------------------------------------------------------------------------- + * On April 19th, 2001 md5_crypt() was modified to make it reentrant + * by Erik Andersen + * + * + * June 28, 2001 Manuel Novoa III + * + * "Un-inlined" code using loops and static const tables in order to + * reduce generated code size (on i386 from approx 4k to approx 2.5k). + * + * June 29, 2001 Manuel Novoa III + * + * Completely removed static PADDING array. + * + * Reintroduced the loop unrolling in MD5_Transform and added the + * MD5_SIZE_OVER_SPEED option for configurability. Define below as: + * 0 fully unrolled loops + * 1 partially unrolled (4 ops per loop) + * 2 no unrolling -- introduces the need to swap 4 variables (slow) + * 3 no unrolling and all 4 loops merged into one with switch + * in each loop (glacial) + * On i386, sizes are roughly (-Os -fno-builtin): + * 0: 3k 1: 2.5k 2: 2.2k 3: 2k + * + * + * Since SuSv3 does not require crypt_r, modified again August 7, 2002 + * by Erik Andersen to remove reentrance stuff... + */ + +/* + * Valid values are 1 (fastest/largest) to 3 (smallest/slowest). + */ +#define MD5_SIZE_OVER_SPEED 3 + +/**********************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include "libcrypt.h" + +/* MD5 context. */ +struct MD5Context { + uint32_t state[4]; /* state (ABCD) */ + uint32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */ + unsigned char buffer[64]; /* input buffer */ +}; + +static void __md5_Init(struct MD5Context *); +static void __md5_Update(struct MD5Context *, const unsigned char *, unsigned int); +static void __md5_Pad(struct MD5Context *); +static void __md5_Final(unsigned char [16], struct MD5Context *); +static void __md5_Transform(uint32_t [4], const unsigned char [64]); + + +#define MD5_MAGIC_STR "$1$" +#define MD5_MAGIC_LEN (sizeof(MD5_MAGIC_STR) - 1) +static const unsigned char __md5__magic[] = MD5_MAGIC_STR; +static const unsigned char __md5_itoa64[] = /* 0 ... 63 => ascii - 64 */ + "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; + + +#ifdef i386 +#define __md5_Encode memcpy +#define __md5_Decode memcpy +#else /* i386 */ + +/* + * __md5_Encodes input (uint32_t) into output (unsigned char). Assumes len is + * a multiple of 4. + */ + +static void +__md5_Encode (unsigned char *output, uint32_t *input, unsigned int len) +{ + unsigned int i, j; + + for (i = 0, j = 0; j < len; i++, j += 4) { + output[j] = (unsigned char)(input[i] & 0xff); + output[j+1] = (unsigned char)((input[i] >> 8) & 0xff); + output[j+2] = (unsigned char)((input[i] >> 16) & 0xff); + output[j+3] = (unsigned char)((input[i] >> 24) & 0xff); + } +} + +/* + * __md5_Decodes input (unsigned char) into output (uint32_t). Assumes len is + * a multiple of 4. + */ + +static void +__md5_Decode (uint32_t *output, const unsigned char *input, unsigned int len) +{ + unsigned int i, j; + + for (i = 0, j = 0; j < len; i++, j += 4) + output[i] = ((uint32_t)input[j]) | (((uint32_t)input[j+1]) << 8) | + (((uint32_t)input[j+2]) << 16) | (((uint32_t)input[j+3]) << 24); +} +#endif /* i386 */ + +/* F, G, H and I are basic MD5 functions. */ +#define F(x, y, z) (((x) & (y)) | ((~x) & (z))) +#define G(x, y, z) (((x) & (z)) | ((y) & (~z))) +#define H(x, y, z) ((x) ^ (y) ^ (z)) +#define I(x, y, z) ((y) ^ ((x) | (~z))) + +/* ROTATE_LEFT rotates x left n bits. */ +#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) + +/* + * FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. + * Rotation is separate from addition to prevent recomputation. + */ +#define FF(a, b, c, d, x, s, ac) { \ + (a) += F ((b), (c), (d)) + (x) + (uint32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define GG(a, b, c, d, x, s, ac) { \ + (a) += G ((b), (c), (d)) + (x) + (uint32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define HH(a, b, c, d, x, s, ac) { \ + (a) += H ((b), (c), (d)) + (x) + (uint32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define II(a, b, c, d, x, s, ac) { \ + (a) += I ((b), (c), (d)) + (x) + (uint32_t)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } + +/* MD5 initialization. Begins an MD5 operation, writing a new context. */ + +static void __md5_Init (struct MD5Context *context) +{ + context->count[0] = context->count[1] = 0; + + /* Load magic initialization constants. */ + context->state[0] = 0x67452301; + context->state[1] = 0xefcdab89; + context->state[2] = 0x98badcfe; + context->state[3] = 0x10325476; +} + +/* + * MD5 block update operation. Continues an MD5 message-digest + * operation, processing another message block, and updating the + * context. + */ + +static void __md5_Update ( struct MD5Context *context, const unsigned char *input, unsigned int inputLen) +{ + unsigned int i, idx, partLen; + + /* Compute number of bytes mod 64 */ + idx = (unsigned int)((context->count[0] >> 3) & 0x3F); + + /* Update number of bits */ + if ((context->count[0] += ((uint32_t)inputLen << 3)) + < ((uint32_t)inputLen << 3)) + context->count[1]++; + context->count[1] += ((uint32_t)inputLen >> 29); + + partLen = 64 - idx; + + /* Transform as many times as possible. */ + if (inputLen >= partLen) { + memcpy((void *)&context->buffer[idx], (const void *)input, + partLen); + __md5_Transform (context->state, context->buffer); + + for (i = partLen; i + 63 < inputLen; i += 64) + __md5_Transform (context->state, &input[i]); + + idx = 0; + } + else + i = 0; + + /* Buffer remaining input */ + memcpy ((void *)&context->buffer[idx], (const void *)&input[i], + inputLen-i); +} + +/* + * MD5 padding. Adds padding followed by original length. + */ + +static void __md5_Pad ( struct MD5Context *context) +{ + unsigned char bits[8]; + unsigned int idx, padLen; + unsigned char PADDING[64]; + + memset(PADDING, 0, sizeof(PADDING)); + PADDING[0] = 0x80; + + /* Save number of bits */ + __md5_Encode (bits, context->count, 8); + + /* Pad out to 56 mod 64. */ + idx = (unsigned int)((context->count[0] >> 3) & 0x3f); + padLen = (idx < 56) ? (56 - idx) : (120 - idx); + __md5_Update (context, PADDING, padLen); + + /* Append length (before padding) */ + __md5_Update (context, bits, 8); +} + +/* + * MD5 finalization. Ends an MD5 message-digest operation, writing the + * the message digest and zeroizing the context. + */ + +static void __md5_Final ( unsigned char digest[16], struct MD5Context *context) +{ + /* Do padding. */ + __md5_Pad (context); + + /* Store state in digest */ + __md5_Encode (digest, context->state, 16); + + /* Zeroize sensitive information. */ + memset ((void *)context, 0, sizeof (*context)); +} + +/* MD5 basic transformation. Transforms state based on block. */ + +static void __md5_Transform (uint32_t state[4], const unsigned char block[64]) +{ + uint32_t a, b, c, d, x[16]; +#if MD5_SIZE_OVER_SPEED > 1 + uint32_t temp; + const char *ps; + + static const char S[] = { + 7, 12, 17, 22, + 5, 9, 14, 20, + 4, 11, 16, 23, + 6, 10, 15, 21 + }; +#endif /* MD5_SIZE_OVER_SPEED > 1 */ + +#if MD5_SIZE_OVER_SPEED > 0 + const uint32_t *pc; + const char *pp; + int i; + + static const uint32_t C[] = { + /* round 1 */ + 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, + 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, + 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, + 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, + /* round 2 */ + 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, + 0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8, + 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, + 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, + /* round 3 */ + 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, + 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, + 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05, + 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, + /* round 4 */ + 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, + 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, + 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, + 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391 + }; + + static const char P[] = { + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 1 */ + 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, /* 2 */ + 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, /* 3 */ + 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 /* 4 */ + }; + +#endif /* MD5_SIZE_OVER_SPEED > 0 */ + + __md5_Decode (x, block, 64); + + a = state[0]; b = state[1]; c = state[2]; d = state[3]; + +#if MD5_SIZE_OVER_SPEED > 2 + pc = C; pp = P; ps = S - 4; + + for ( i = 0 ; i < 64 ; i++ ) { + if ((i&0x0f) == 0) ps += 4; + temp = a; + switch (i>>4) { + case 0: + temp += F(b,c,d); + break; + case 1: + temp += G(b,c,d); + break; + case 2: + temp += H(b,c,d); + break; + case 3: + temp += I(b,c,d); + break; + } + temp += x[(int)(*pp++)] + *pc++; + temp = ROTATE_LEFT(temp, ps[i&3]); + temp += b; + a = d; d = c; c = b; b = temp; + } +#elif MD5_SIZE_OVER_SPEED > 1 + pc = C; pp = P; ps = S; + + /* Round 1 */ + for ( i = 0 ; i < 16 ; i++ ) { + FF (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++); + temp = d; d = c; c = b; b = a; a = temp; + } + + /* Round 2 */ + ps += 4; + for ( ; i < 32 ; i++ ) { + GG (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++); + temp = d; d = c; c = b; b = a; a = temp; + } + /* Round 3 */ + ps += 4; + for ( ; i < 48 ; i++ ) { + HH (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++); + temp = d; d = c; c = b; b = a; a = temp; + } + + /* Round 4 */ + ps += 4; + for ( ; i < 64 ; i++ ) { + II (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++); + temp = d; d = c; c = b; b = a; a = temp; + } +#elif MD5_SIZE_OVER_SPEED > 0 + pc = C; pp = P; + + /* Round 1 */ + for ( i = 0 ; i < 4 ; i++ ) { + FF (a, b, c, d, x[(int)(*pp++)], 7, *pc++); + FF (d, a, b, c, x[(int)(*pp++)], 12, *pc++); + FF (c, d, a, b, x[(int)(*pp++)], 17, *pc++); + FF (b, c, d, a, x[(int)(*pp++)], 22, *pc++); + } + + /* Round 2 */ + for ( i = 0 ; i < 4 ; i++ ) { + GG (a, b, c, d, x[(int)(*pp++)], 5, *pc++); + GG (d, a, b, c, x[(int)(*pp++)], 9, *pc++); + GG (c, d, a, b, x[(int)(*pp++)], 14, *pc++); + GG (b, c, d, a, x[(int)(*pp++)], 20, *pc++); + } + /* Round 3 */ + for ( i = 0 ; i < 4 ; i++ ) { + HH (a, b, c, d, x[(int)(*pp++)], 4, *pc++); + HH (d, a, b, c, x[(int)(*pp++)], 11, *pc++); + HH (c, d, a, b, x[(int)(*pp++)], 16, *pc++); + HH (b, c, d, a, x[(int)(*pp++)], 23, *pc++); + } + + /* Round 4 */ + for ( i = 0 ; i < 4 ; i++ ) { + II (a, b, c, d, x[(int)(*pp++)], 6, *pc++); + II (d, a, b, c, x[(int)(*pp++)], 10, *pc++); + II (c, d, a, b, x[(int)(*pp++)], 15, *pc++); + II (b, c, d, a, x[(int)(*pp++)], 21, *pc++); + } +#else + /* Round 1 */ +#define S11 7 +#define S12 12 +#define S13 17 +#define S14 22 + FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */ + FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */ + FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */ + FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */ + FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */ + FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */ + FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */ + FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */ + FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */ + FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */ + FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */ + FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */ + FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */ + FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */ + FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */ + FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */ + + /* Round 2 */ +#define S21 5 +#define S22 9 +#define S23 14 +#define S24 20 + GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */ + GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */ + GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */ + GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */ + GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */ + GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */ + GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */ + GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */ + GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */ + GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */ + GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */ + GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ + GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ + GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ + GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ + GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ + + /* Round 3 */ +#define S31 4 +#define S32 11 +#define S33 16 +#define S34 23 + HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */ + HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */ + HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */ + HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */ + HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */ + HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */ + HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */ + HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */ + HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */ + HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */ + HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */ + HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */ + HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */ + HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */ + HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */ + HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */ + + /* Round 4 */ +#define S41 6 +#define S42 10 +#define S43 15 +#define S44 21 + II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */ + II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */ + II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */ + II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */ + II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */ + II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */ + II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */ + II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */ + II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */ + II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */ + II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */ + II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */ + II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */ + II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */ + II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */ + II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */ +#endif + + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + + /* Zeroize sensitive information. */ + memset ((void *)x, 0, sizeof (x)); +} + + +static void __md5_to64( char *s, unsigned long v, int n) +{ + while (--n >= 0) { + *s++ = __md5_itoa64[v&0x3f]; + v >>= 6; + } +} + +/* + * UNIX password + * + * Use MD5 for what it is best at... + */ + +char *__md5_crypt(const unsigned char *pw, const unsigned char *salt) +{ + /* Static stuff */ + static char passwd[120]; + + const unsigned char *sp, *ep; + char *p; + unsigned char final[17]; /* final[16] exists only to aid in looping */ + int sl,pl,i,pw_len; + struct MD5Context ctx,ctx1; + unsigned long l; + + /* Refine the Salt first */ + sp = salt; + + /* If it starts with the magic string, then skip that */ + if(!strncmp(sp,__md5__magic,MD5_MAGIC_LEN)) + sp += MD5_MAGIC_LEN; + + /* It stops at the first '$', max 8 chars */ + for(ep=sp;*ep && *ep != '$' && ep < (sp+8);ep++) + continue; + + /* get the length of the true salt */ + sl = ep - sp; + + __md5_Init(&ctx); + + /* The password first, since that is what is most unknown */ + pw_len = strlen(pw); + __md5_Update(&ctx,pw,pw_len); + + /* Then our magic string */ + __md5_Update(&ctx,__md5__magic,MD5_MAGIC_LEN); + + /* Then the raw salt */ + __md5_Update(&ctx,sp,sl); + + /* Then just as many characters of the MD5(pw,salt,pw) */ + __md5_Init(&ctx1); + __md5_Update(&ctx1,pw,pw_len); + __md5_Update(&ctx1,sp,sl); + __md5_Update(&ctx1,pw,pw_len); + __md5_Final(final,&ctx1); + for(pl = pw_len; pl > 0; pl -= 16) + __md5_Update(&ctx,final,pl>16 ? 16 : pl); + + /* Don't leave anything around in vm they could use. */ + memset(final,0,sizeof final); + + /* Then something really weird... */ + for (i = pw_len; i ; i >>= 1) { + __md5_Update(&ctx, ((i&1) ? final : (const unsigned char *) pw), 1); + } + + /* Now make the output string */ + strcpy(passwd,__md5__magic); + strncat(passwd,sp,sl); + strcat(passwd,"$"); + + __md5_Final(final,&ctx); + + /* + * and now, just to make sure things don't run too fast + * On a 60 Mhz Pentium this takes 34 msec, so you would + * need 30 seconds to build a 1000 entry dictionary... + */ + for(i=0;i<1000;i++) { + __md5_Init(&ctx1); + if(i & 1) + __md5_Update(&ctx1,pw,pw_len); + else + __md5_Update(&ctx1,final,16); + + if(i % 3) + __md5_Update(&ctx1,sp,sl); + + if(i % 7) + __md5_Update(&ctx1,pw,pw_len); + + if(i & 1) + __md5_Update(&ctx1,final,16); + else + __md5_Update(&ctx1,pw,pw_len); + __md5_Final(final,&ctx1); + } + + p = passwd + strlen(passwd); + + final[16] = final[5]; + for ( i=0 ; i < 5 ; i++ ) { + l = (final[i]<<16) | (final[i+6]<<8) | final[i+12]; + __md5_to64(p,l,4); p += 4; + } + l = final[11]; + __md5_to64(p,l,2); p += 2; + *p = '\0'; + + /* Don't leave anything around in vm they could use. */ + memset(final,0,sizeof final); + + return passwd; +} + -- 2.11.4.GIT