diff options
| -rw-r--r-- | include/libbb.h | 22 | ||||
| -rw-r--r-- | libbb/correct_password.c | 2 | ||||
| -rw-r--r-- | libbb/pw_encrypt.c | 53 | ||||
| -rw-r--r-- | libbb/pw_encrypt_des.c | 703 | ||||
| -rw-r--r-- | libbb/pw_encrypt_md5.c | 656 | ||||
| -rw-r--r-- | loginutils/chpasswd.c | 2 | ||||
| -rw-r--r-- | loginutils/cryptpw.c | 32 | ||||
| -rw-r--r-- | loginutils/passwd.c | 4 | ||||
| -rw-r--r-- | loginutils/sulogin.c | 2 | ||||
| -rw-r--r-- | networking/httpd.c | 4 |
10 files changed, 1456 insertions, 24 deletions
diff --git a/include/libbb.h b/include/libbb.h index 97aae0bb4..bd2dbe573 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -1032,18 +1032,8 @@ extern int restricted_shell(const char *shell); extern void setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw); extern int correct_password(const struct passwd *pw); /* Returns a ptr to static storage */ -extern char *pw_encrypt(const char *clear, const char *salt); +extern char *pw_encrypt(const char *clear, const char *salt, int cleanup); extern int obscure(const char *old, const char *newval, const struct passwd *pwdp); - -int index_in_str_array(const char *const string_array[], const char *key); -int index_in_strings(const char *strings, const char *key); -int index_in_substr_array(const char *const string_array[], const char *key); -int index_in_substrings(const char *strings, const char *key); -const char *nth_string(const char *strings, int n); - -extern void print_login_issue(const char *issue_file, const char *tty); -extern void print_login_prompt(void); - /* rnd is additional random input. New one is returned. * Useful if you call crypt_make_salt many times in a row: * rnd = crypt_make_salt(buf1, 4, 0); @@ -1052,11 +1042,19 @@ extern void print_login_prompt(void); * (otherwise we risk having same salt generated) */ extern int crypt_make_salt(char *p, int cnt, int rnd); - /* Returns number of lines changed, or -1 on error */ extern int update_passwd(const char *filename, const char *username, const char *new_pw); +int index_in_str_array(const char *const string_array[], const char *key); +int index_in_strings(const char *strings, const char *key); +int index_in_substr_array(const char *const string_array[], const char *key); +int index_in_substrings(const char *strings, const char *key); +const char *nth_string(const char *strings, int n); + +extern void print_login_issue(const char *issue_file, const char *tty); +extern void print_login_prompt(void); + /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */ int get_terminal_width_height(int fd, unsigned *width, unsigned *height); diff --git a/libbb/correct_password.c b/libbb/correct_password.c index 96bb10e0b..a4ded8b5f 100644 --- a/libbb/correct_password.c +++ b/libbb/correct_password.c @@ -71,7 +71,7 @@ int correct_password(const struct passwd *pw) if (!unencrypted) { return 0; } - encrypted = crypt(unencrypted, correct); + encrypted = pw_encrypt(unencrypted, correct, 1); memset(unencrypted, 0, strlen(unencrypted)); return strcmp(encrypted, correct) == 0; } diff --git a/libbb/pw_encrypt.c b/libbb/pw_encrypt.c index e9cf4e3b8..d439fc3b4 100644 --- a/libbb/pw_encrypt.c +++ b/libbb/pw_encrypt.c @@ -8,11 +8,52 @@ */ #include "libbb.h" -#include <crypt.h> -char *pw_encrypt(const char *clear, const char *salt) +/* + * DES and MD5 crypt implementations are taken from uclibc. + * They were modified to not use static buffers. + * Comparison with uclibc (before uclibc had 70k staic buffers reinstated): + * text data bss dec hex filename + * 759909 604 6684 767197 bb4dd busybox_old + * 759579 604 6684 766867 bb393 busybox_unstripped + */ +/* Common for them */ +static const uint8_t ascii64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; +#include "pw_encrypt_des.c" +#include "pw_encrypt_md5.c" + + +static struct const_des_ctx *des_cctx; +static struct des_ctx *des_ctx; + +/* my_crypt returns malloc'ed data */ +static char *my_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(xzalloc(MD5_OUT_BUFSIZE), (unsigned char*)key, (unsigned char*)salt); + } + + { + if (!des_cctx) + des_cctx = const_des_init(); + des_ctx = des_init(des_ctx, des_cctx); + return des_crypt(des_ctx, xzalloc(DES_OUT_BUFSIZE), (unsigned char*)key, (unsigned char*)salt); + } +} + +/* So far nobody wants to have it public */ +static void my_crypt_cleanup(void) +{ + free(des_cctx); + free(des_ctx); + des_cctx = NULL; + des_ctx = NULL; +} + +char *pw_encrypt(const char *clear, const char *salt, int cleanup) { - /* Was static char[BIGNUM]. Malloced thing works as well */ static char *cipher; #if 0 /* was CONFIG_FEATURE_SHA1_PASSWORDS, but there is no such thing??? */ @@ -22,6 +63,10 @@ char *pw_encrypt(const char *clear, const char *salt) #endif free(cipher); - cipher = xstrdup(crypt(clear, salt)); + cipher = my_crypt(clear, salt); + + if (cleanup) + my_crypt_cleanup(); + return cipher; } diff --git a/libbb/pw_encrypt_des.c b/libbb/pw_encrypt_des.c new file mode 100644 index 000000000..637765ead --- /dev/null +++ b/libbb/pw_encrypt_des.c @@ -0,0 +1,703 @@ +/* + * 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 <davidb@werj.com.au>. + * + * 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). + */ + +/* A pile of data */ +static const uint8_t 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 uint8_t 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 uint8_t key_shifts[16] = { + 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 +}; + +static const uint8_t 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 uint8_t 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 uint8_t 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 uint8_t 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 stuff that stays resident and doesn't change after + * being initialized, and therefore doesn't need to be made + * reentrant. */ +struct const_des_ctx { + uint8_t init_perm[64], final_perm[64]; /* referenced 2 times each */ + uint8_t m_sbox[4][4096]; /* 5 times */ +}; +#define C (*cctx) +#define init_perm (C.init_perm ) +#define final_perm (C.final_perm) +#define m_sbox (C.m_sbox ) + +static struct const_des_ctx* +const_des_init(void) +{ + int i, j, b; + uint8_t u_sbox[8][64]; + struct const_des_ctx *cctx; + + cctx = xmalloc(sizeof(*cctx)); + + /* + * 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] = + (uint8_t)((u_sbox[(b << 1)][i] << 4) | + u_sbox[(b << 1) + 1][j]); + + /* + * Set up the initial & final permutations into a useful form. + */ + for (i = 0; i < 64; i++) { + final_perm[i] = IP[i] - 1; + init_perm[final_perm[i]] = (uint8_t)i; + } + + return cctx; +} + + +struct des_ctx { + const struct const_des_ctx *const_ctx; + uint32_t saltbits; /* referenced 5 times */ + uint32_t old_salt; /* 3 times */ + uint32_t old_rawkey0, old_rawkey1; /* 3 times each */ + uint8_t un_pbox[32]; /* 2 times */ + uint8_t inv_comp_perm[56]; /* 3 times */ + uint8_t inv_key_perm[64]; /* 3 times */ + uint32_t en_keysl[16], en_keysr[16]; /* 2 times each */ + uint32_t de_keysl[16], de_keysr[16]; /* 2 times each */ + uint32_t ip_maskl[8][256], ip_maskr[8][256]; /* 9 times each */ + uint32_t fp_maskl[8][256], fp_maskr[8][256]; /* 9 times each */ + uint32_t key_perm_maskl[8][128], key_perm_maskr[8][128]; /* 9 times */ + uint32_t comp_maskl[8][128], comp_maskr[8][128]; /* 9 times each */ + uint32_t psbox[4][256]; /* 5 times */ +}; +#define D (*ctx) +#define const_ctx (D.const_ctx ) +#define saltbits (D.saltbits ) +#define old_salt (D.old_salt ) +#define old_rawkey0 (D.old_rawkey0 ) +#define old_rawkey1 (D.old_rawkey1 ) +#define un_pbox (D.un_pbox ) +#define inv_comp_perm (D.inv_comp_perm ) +#define inv_key_perm (D.inv_key_perm ) +#define en_keysl (D.en_keysl ) +#define en_keysr (D.en_keysr ) +#define de_keysl (D.de_keysl ) +#define de_keysr (D.de_keysr ) +#define ip_maskl (D.ip_maskl ) +#define ip_maskr (D.ip_maskr ) +#define fp_maskl (D.fp_maskl ) +#define fp_maskr (D.fp_maskr ) +#define key_perm_maskl (D.key_perm_maskl ) +#define key_perm_maskr (D.key_perm_maskr ) +#define comp_maskl (D.comp_maskl ) +#define comp_maskr (D.comp_maskr ) +#define psbox (D.psbox ) + +static struct des_ctx* +des_init(struct des_ctx *ctx, const struct const_des_ctx *cctx) +{ + int i, j, b, k, inbit, obit; + uint32_t *p, *il, *ir, *fl, *fr; + const uint32_t *bits28, *bits24; + + if (!ctx) + ctx = xmalloc(sizeof(*ctx)); + const_ctx = cctx; + + old_rawkey0 = old_rawkey1 = 0L; + saltbits = 0L; + old_salt = 0L; + bits28 = bits32 + 4; + bits24 = bits28 + 4; + + /* + * Initialise the inverted key permutation. + */ + for (i = 0; i < 64; 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] = (uint8_t)i; + inv_comp_perm[i] = 255; + } + + /* + * Invert the key compression permutation. + */ + for (i = 0; i < 48; i++) { + inv_comp_perm[comp_perm[i] - 1] = (uint8_t)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]; + ir = &ip_maskr[k][i]; + fl = &fp_maskl[k][i]; + fr = &fp_maskr[k][i]; + *il = 0; + *ir = 0; + *fl = 0; + *fr = 0; + for (j = 0; j < 8; j++) { + inbit = 8 * k + j; + if (i & bits8[j]) { + obit = init_perm[inbit]; + if (obit < 32) + *il |= bits32[obit]; + else + *ir |= bits32[obit - 32]; + obit = final_perm[inbit]; + if (obit < 32) + *fl |= bits32[obit]; + else + *fr |= bits32[obit - 32]; + } + } + } + for (i = 0; i < 128; i++) { + il = &key_perm_maskl[k][i]; + ir = &key_perm_maskr[k][i]; + *il = 0; + *ir = 0; + for (j = 0; j < 7; j++) { + inbit = 8 * k + j; + if (i & bits8[j + 1]) { + obit = inv_key_perm[inbit]; + if (obit == 255) + continue; + if (obit < 28) + *il |= bits28[obit]; + else + *ir |= bits28[obit - 28]; + } + } + il = &comp_maskl[k][i]; + ir = &comp_maskr[k][i]; + *il = 0; + *ir = 0; + for (j = 0; j < 7; j++) { + inbit = 7 * k + j; + if (i & bits8[j + 1]) { + obit = inv_comp_perm[inbit]; + if (obit == 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] = (uint8_t)i; + + for (b = 0; b < 4; b++) { + for (i = 0; i < 256; i++) { + p = &psbox[b][i]; + *p = 0; + for (j = 0; j < 8; j++) { + if (i & bits8[j]) + *p |= bits32[un_pbox[8 * b + j]]; + } + } + } + + return ctx; +} + + +static void +setup_salt(struct des_ctx *ctx, uint32_t salt) +{ +// const struct const_des_ctx *cctx = const_ctx; + 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(struct des_ctx *ctx, const char *key) +{ +// const struct const_des_ctx *cctx = const_ctx; + uint32_t k0, k1, rawkey0, rawkey1; + int shifts, round; + + 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(struct des_ctx *ctx, uint32_t l_in, uint32_t r_in, uint32_t *l_out, uint32_t *r_out, int count) +{ + const struct const_des_ctx *cctx = const_ctx; + /* + * 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 = f; /* silence gcc */ + uint32_t r48l, r48r; + int round; + + /* + * Encrypting + */ + kl1 = en_keysl; + kr1 = en_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; + while (round--) { + /* + * 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; + } + 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; +} + +#define DES_OUT_BUFSIZE 21 + +static char * +des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const unsigned char *setting) +{ + uint32_t salt, l, r0, r1, keybuf[2]; + uint8_t *p, *q; + + /* + * Copy the key, shifting each character up by one bit + * and padding with zeros. + */ + q = (uint8_t *)keybuf; + while (q - (uint8_t *)keybuf - 8) { + *q++ = *key << 1; + if (*(q - 1)) + key++; + } + des_setkey(ctx, (char *)keybuf); + + /* + * setting - 2 bytes of salt + * key - up to 8 characters + */ + 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 = (uint8_t *)output + 2; + + setup_salt(ctx, salt); + /* + * Do it. + */ + do_des(ctx, 0L, 0L, &r0, &r1, 25 /* count */); + + /* + * 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; +} + +// des_setkey never fails + +#undef C +#undef init_perm +#undef final_perm +#undef m_sbox +#undef D +#undef const_ctx +#undef saltbits +#undef old_salt +#undef old_rawkey0 +#undef old_rawkey1 +#undef un_pbox +#undef inv_comp_perm +#undef inv_key_perm +#undef en_keysl +#undef en_keysr +#undef de_keysl +#undef de_keysr +#undef ip_maskl +#undef ip_maskr +#undef fp_maskl +#undef fp_maskr +#undef key_perm_maskl +#undef key_perm_maskr +#undef comp_maskl +#undef comp_maskr +#undef psbox diff --git a/libbb/pw_encrypt_md5.c b/libbb/pw_encrypt_md5.c new file mode 100644 index 000000000..42eb13440 --- /dev/null +++ b/libbb/pw_encrypt_md5.c @@ -0,0 +1,656 @@ +/* + * 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): + * <phk@login.dknet.dk> 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 <andersen@uclibc.org> + * + * + * 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 + +/**********************************************************************/ + +/* 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; + + +#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] = input[i]; + output[j+1] = (input[i] >> 8); + output[j+2] = (input[i] >> 16); + output[j+3] = (input[i] >> 24); + } +} + +/* + * __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 = (context->count[0] >> 3) & 0x3F; + + /* Update number of bits */ + context->count[0] += (inputLen << 3); + if (context->count[0] < (inputLen << 3)) + context->count[1]++; + context->count[1] += (inputLen >> 29); + + partLen = 64 - idx; + + /* Transform as many times as possible. */ + if (inputLen >= partLen) { + memcpy(&context->buffer[idx], 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(&context->buffer[idx], &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 = (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(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 unsigned char *ps; + + static const unsigned 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 unsigned 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 unsigned 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[*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[*pp], ps[i & 0x3], *pc); pp++; 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[*pp], ps[i & 0x3], *pc); pp++; 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[*pp], ps[i & 0x3], *pc); pp++; 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[*pp], ps[i & 0x3], *pc); pp++; 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[*pp], 7, *pc); pp++; pc++; + FF(d, a, b, c, x[*pp], 12, *pc); pp++; pc++; + FF(c, d, a, b, x[*pp], 17, *pc); pp++; pc++; + FF(b, c, d, a, x[*pp], 22, *pc); pp++; pc++; + } + + /* Round 2 */ + for (i = 0; i < 4; i++) { + GG(a, b, c, d, x[*pp], 5, *pc); pp++; pc++; + GG(d, a, b, c, x[*pp], 9, *pc); pp++; pc++; + GG(c, d, a, b, x[*pp], 14, *pc); pp++; pc++; + GG(b, c, d, a, x[*pp], 20, *pc); pp++; pc++; + } + /* Round 3 */ + for (i = 0; i < 4; i++) { + HH(a, b, c, d, x[*pp], 4, *pc); pp++; pc++; + HH(d, a, b, c, x[*pp], 11, *pc); pp++; pc++; + HH(c, d, a, b, x[*pp], 16, *pc); pp++; pc++; + HH(b, c, d, a, x[*pp], 23, *pc); pp++; pc++; + } + + /* Round 4 */ + for (i = 0; i < 4; i++) { + II(a, b, c, d, x[*pp], 6, *pc); pp++; pc++; + II(d, a, b, c, x[*pp], 10, *pc); pp++; pc++; + II(c, d, a, b, x[*pp], 15, *pc); pp++; pc++; + II(b, c, d, a, x[*pp], 21, *pc); pp++; 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(x, 0, sizeof(x)); +} + + +static void +__md5_to64(char *s, unsigned long v, int n) +{ + while (--n >= 0) { + *s++ = ascii64[v & 0x3f]; + v >>= 6; + } +} + +/* + * UNIX password + * + * Use MD5 for what it is best at... + */ +#define MD5_OUT_BUFSIZE 120 + +static char * +md5_crypt(char passwd[120], const unsigned char *pw, const unsigned char *salt) +{ + 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; + +// always true for bbox +// /* 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((char*)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. */ +//TODO: the above comment seems to be wrong. final is used later. + 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 */ + passwd[0] = '$'; + passwd[1] = '1'; + passwd[2] = '$'; + strncpy(passwd + 3, (char*)sp, sl); + passwd[sl + 3] = '$'; + passwd[sl + 4] = '\0'; + + __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 + sl + 4; /*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; +} + +#undef MD5_SIZE_OVER_SPEED +#undef MD5_MAGIC_STR +#undef MD5_MAGIC_LEN +#undef __md5_Encode +#undef __md5_Decode +#undef F +#undef G +#undef H +#undef I +#undef ROTATE_LEFT +#undef FF +#undef GG +#undef HH +#undef II +#undef S11 +#undef S12 +#undef S13 +#undef S14 +#undef S21 +#undef S22 +#undef S23 +#undef S24 +#undef S31 +#undef S32 +#undef S33 +#undef S34 +#undef S41 +#undef S42 +#undef S43 +#undef S44 diff --git a/loginutils/chpasswd.c b/loginutils/chpasswd.c index 5dc7a9bf0..230ab0fc9 100644 --- a/loginutils/chpasswd.c +++ b/loginutils/chpasswd.c @@ -47,7 +47,7 @@ int chpasswd_main(int argc ATTRIBUTE_UNUSED, char **argv) strcpy(salt, "$1$"); rnd = crypt_make_salt(salt + 3, 4, rnd); } - pass = pw_encrypt(pass, salt); + pass = pw_encrypt(pass, salt, 0); } /* This is rather complex: if user is not found in /etc/shadow, diff --git a/loginutils/cryptpw.c b/loginutils/cryptpw.c index 68f5e8074..1acbc6db0 100644 --- a/loginutils/cryptpw.c +++ b/loginutils/cryptpw.c @@ -7,6 +7,30 @@ #include "libbb.h" +#define TESTING 0 + +/* +set TESTING to 1 and pipe some file through this script +if you played with bbox's crypt implementation. + +while read line; do + n=`./busybox cryptpw -a des -- "$line"` + o=`./busybox_old cryptpw -a des -- "$line"` + test "$n" != "$o" && { + echo n="$n" + echo o="$o" + exit + } + n=`./busybox cryptpw -- "$line"` + o=`./busybox_old cryptpw -- "$line"` + test "$n" != "$o" && { + echo n="$n" + echo o="$o" + exit + } +done + */ + int cryptpw_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int cryptpw_main(int argc ATTRIBUTE_UNUSED, char **argv) { @@ -18,11 +42,17 @@ int cryptpw_main(int argc ATTRIBUTE_UNUSED, char **argv) //((uint32_t*)&salt)[0] = '$' + '1'*0x100 + '$'*0x10000; /* Hope one day gcc will do it itself (inlining strcpy) */ crypt_make_salt(salt + 3, 4, 0); /* md5 */ +#if TESTING + strcpy(salt + 3, "ajg./bcf"); +#endif } else { crypt_make_salt(salt, 1, 0); /* des */ +#if TESTING + strcpy(salt, "a."); +#endif } - puts(pw_encrypt(argv[optind] ? argv[optind] : xmalloc_fgetline(stdin), salt)); + puts(pw_encrypt(argv[optind] ? argv[optind] : xmalloc_fgetline(stdin), salt, 1)); return 0; } diff --git a/loginutils/passwd.c b/loginutils/passwd.c index 3353db1fa..fad226c00 100644 --- a/loginutils/passwd.c +++ b/loginutils/passwd.c @@ -24,7 +24,7 @@ static char* new_password(const struct passwd *pw, uid_t myuid, int algo) orig = bb_askpass(0, "Old password:"); /* returns ptr to static */ if (!orig) goto err_ret; - cipher = pw_encrypt(orig, pw->pw_passwd); /* returns ptr to static */ + cipher = pw_encrypt(orig, pw->pw_passwd, 1); /* returns ptr to static */ if (strcmp(cipher, pw->pw_passwd) != 0) { syslog(LOG_WARNING, "incorrect password for '%s'", pw->pw_name); @@ -56,7 +56,7 @@ static char* new_password(const struct passwd *pw, uid_t myuid, int algo) crypt_make_salt(salt + 3, 4, 0); } /* pw_encrypt returns ptr to static */ - ret = xstrdup(pw_encrypt(newp, salt)); + ret = xstrdup(pw_encrypt(newp, salt, 1)); /* whee, success! */ err_ret: diff --git a/loginutils/sulogin.c b/loginutils/sulogin.c index 17bb15efa..f52ce8a95 100644 --- a/loginutils/sulogin.c +++ b/loginutils/sulogin.c @@ -81,7 +81,7 @@ int sulogin_main(int argc ATTRIBUTE_UNUSED, char **argv) bb_info_msg("Normal startup"); return 0; } - if (strcmp(pw_encrypt(cp, pwd->pw_passwd), pwd->pw_passwd) == 0) { + if (strcmp(pw_encrypt(cp, pwd->pw_passwd, 1), pwd->pw_passwd) == 0) { break; } bb_do_delay(FAIL_DELAY); diff --git a/networking/httpd.c b/networking/httpd.c index 4da7e5c65..78c6f4d1d 100644 --- a/networking/httpd.c +++ b/networking/httpd.c @@ -1733,7 +1733,7 @@ static int checkPerm(const char *path, const char *request) && pp[3] == '$' && pp[4] ) { pp++; - cipher = pw_encrypt(u+1, pp); + cipher = pw_encrypt(u+1, pp, 1); if (strcmp(cipher, pp) == 0) goto set_remoteuser_var; /* Ok */ /* unauthorized */ @@ -2352,7 +2352,7 @@ int httpd_main(int argc ATTRIBUTE_UNUSED, char **argv) #endif #if ENABLE_FEATURE_HTTPD_AUTH_MD5 if (opt & OPT_MD5) { - puts(pw_encrypt(pass, "$1$")); + puts(pw_encrypt(pass, "$1$", 1)); return 0; } #endif |