From 3c31685e1117e93ef7186feecfdea665df3cfb66 Mon Sep 17 00:00:00 2001 From: nobu Date: Wed, 1 Jun 2016 00:48:08 +0000 Subject: use crypt_r * string.c (rb_str_crypt): use reentrant crypt_r. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55237 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- missing/crypt_r.c | 811 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 811 insertions(+) create mode 100644 missing/crypt_r.c (limited to 'missing/crypt_r.c') diff --git a/missing/crypt_r.c b/missing/crypt_r.c new file mode 100644 index 0000000000..b3faaa62c7 --- /dev/null +++ b/missing/crypt_r.c @@ -0,0 +1,811 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Tom Truscott. + * + * 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 University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)crypt.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include "ruby/missing.h" +#include "crypt.h" +#ifdef HAVE_UNISTD_H +#include +#endif +#include +#ifdef HAVE_PWD_H +#include +#endif +#include +#include +#ifndef _PASSWORD_EFMT1 +#define _PASSWORD_EFMT1 '_' +#endif + +/* + * UNIX password, and DES, encryption. + * By Tom Truscott, trt@rti.rti.org, + * from algorithms by Robert W. Baldwin and James Gillogly. + * + * References: + * "Mathematical Cryptology for Computer Scientists and Mathematicians," + * by Wayne Patterson, 1987, ISBN 0-8476-7438-X. + * + * "Password Security: A Case History," R. Morris and Ken Thompson, + * Communications of the ACM, vol. 22, pp. 594-597, Nov. 1979. + * + * "DES will be Totally Insecure within Ten Years," M.E. Hellman, + * IEEE Spectrum, vol. 16, pp. 32-39, July 1979. + */ + +/* ===== Configuration ==================== */ + +/* + * define "MUST_ALIGN" if your compiler cannot load/store + * long integers at arbitrary (e.g. odd) memory locations. + * (Either that or never pass unaligned addresses to des_cipher!) + */ +#if !defined(vax) +#define MUST_ALIGN +#endif + +#ifdef CHAR_BITS +#if CHAR_BITS != 8 + #error C_block structure assumes 8 bit characters +#endif +#endif + +/* + * Convert twenty-four-bit long in host-order + * to six bits (and 2 low-order zeroes) per char little-endian format. + */ +#define TO_SIX_BIT(rslt, src) { \ + C_block cvt; \ + cvt.b[0] = (unsigned char)(src); (src) >>= 6; \ + cvt.b[1] = (unsigned char)(src); (src) >>= 6; \ + cvt.b[2] = (unsigned char)(src); (src) >>= 6; \ + cvt.b[3] = (unsigned char)(src); \ + (rslt) = (cvt.b32.i0 & 0x3f3f3f3fL) << 2; \ + } + +/* + * These macros may someday permit efficient use of 64-bit integers. + */ +#define ZERO(d,d0,d1) ((d0) = 0, (d1) = 0) +#define LOAD(d,d0,d1,bl) ((d0) = (bl).b32.i0, (d1) = (bl).b32.i1) +#define LOADREG(d,d0,d1,s,s0,s1) ((d0) = (s0), (d1) = (s1)) +#define OR(d,d0,d1,bl) ((d0) |= (bl).b32.i0, (d1) |= (bl).b32.i1) +#define STORE(s,s0,s1,bl) ((bl).b32.i0 = (s0), (bl).b32.i1 = (s1)) +#define DCL_BLOCK(d,d0,d1) long d0, d1 + +#if defined(LARGEDATA) + /* Waste memory like crazy. Also, do permutations in line */ +#define PERM6464(d,d0,d1,cpp,p) \ + LOAD((d),(d0),(d1),(p)[(0<>4]; OR(D,D0,D1,*tp); p += (1< 0); + STORE(D,D0,D1,*out); +} +#endif /* LARGEDATA */ + +#ifdef DEBUG +STATIC void prtab(const char *s, const unsigned char *t, int num_rows); +#endif + +/* ===== (mostly) Standard DES Tables ==================== */ + +static const unsigned char IP[] = { /* initial permutation */ + 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, +}; + +/* The final permutation is the inverse of IP - no table is necessary */ + +static const unsigned char ExpandTr[] = { /* expansion operation */ + 32, 1, 2, 3, 4, 5, + 4, 5, 6, 7, 8, 9, + 8, 9, 10, 11, 12, 13, + 12, 13, 14, 15, 16, 17, + 16, 17, 18, 19, 20, 21, + 20, 21, 22, 23, 24, 25, + 24, 25, 26, 27, 28, 29, + 28, 29, 30, 31, 32, 1, +}; + +static const unsigned char PC1[] = { /* permuted choice table 1 */ + 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 Rotates[] = { /* PC1 rotation schedule */ + 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1, +}; + +/* note: each "row" of PC2 is left-padded with bits that make it invertible */ +static const unsigned char PC2[] = { /* permuted choice table 2 */ + 9, 18, 14, 17, 11, 24, 1, 5, + 22, 25, 3, 28, 15, 6, 21, 10, + 35, 38, 23, 19, 12, 4, 26, 8, + 43, 54, 16, 7, 27, 20, 13, 2, + + 0, 0, 41, 52, 31, 37, 47, 55, + 0, 0, 30, 40, 51, 45, 33, 48, + 0, 0, 44, 49, 39, 56, 34, 53, + 0, 0, 46, 42, 50, 36, 29, 32, +}; + +static const unsigned char S[8][64] = { /* 48->32 bit substitution tables */ + { + /* S[1] */ + 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, + }, + { + /* S[2] */ + 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, + }, + { + /* S[3] */ + 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, + }, + { + /* S[4] */ + 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, + }, + { + /* S[5] */ + 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, + }, + { + /* S[6] */ + 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, + }, + { + /* S[7] */ + 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, + }, + { + /* S[8] */ + 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 P32Tr[] = { /* 32-bit permutation function */ + 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 unsigned char CIFP[] = { /* compressed/interleaved permutation */ + 1, 2, 3, 4, 17, 18, 19, 20, + 5, 6, 7, 8, 21, 22, 23, 24, + 9, 10, 11, 12, 25, 26, 27, 28, + 13, 14, 15, 16, 29, 30, 31, 32, + + 33, 34, 35, 36, 49, 50, 51, 52, + 37, 38, 39, 40, 53, 54, 55, 56, + 41, 42, 43, 44, 57, 58, 59, 60, + 45, 46, 47, 48, 61, 62, 63, 64, +}; + +static const unsigned char itoa64[] = /* 0..63 => ascii-64 */ + "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; + + +#define a64toi (data->a64toi) +#define PC1ROT (data->PC1ROT) +#define PC2ROT (data->PC2ROT) +#define IE3264 (data->IE3264) +#define SPE (data->SPE) +#define CF6464 (data->CF6464) +#define KS (data->KS) +#define constdatablock (data->constdatablock) +#define cryptresult (data->cryptresult) +#define des_ready (data->initialized) + +STATIC void init_des(struct crypt_data *); +STATIC void init_perm(C_block perm[64/CHUNKBITS][1<= 0; ) { + if ((t = (unsigned char)setting[i]) == '\0') + t = '.'; + encp[i] = t; + num_iter = (num_iter<<6) | a64toi[t]; + } + setting += 4; + encp += 4; + salt_size = 4; + break; + default: + num_iter = 25; + salt_size = 2; + } + + salt = 0; + for (i = salt_size; --i >= 0; ) { + if ((t = (unsigned char)setting[i]) == '\0') + t = '.'; + encp[i] = t; + salt = (salt<<6) | a64toi[t]; + } + encp += salt_size; + des_cipher_r((char *)&constdatablock, (char *)&rsltblock, + salt, num_iter, data); + + /* + * Encode the 64 cipher bits as 11 ascii characters. + */ + i = ((long)((rsltblock.b[0]<<8) | rsltblock.b[1])<<8) | rsltblock.b[2]; + encp[3] = itoa64[i&0x3f]; i >>= 6; + encp[2] = itoa64[i&0x3f]; i >>= 6; + encp[1] = itoa64[i&0x3f]; i >>= 6; + encp[0] = itoa64[i]; encp += 4; + i = ((long)((rsltblock.b[3]<<8) | rsltblock.b[4])<<8) | rsltblock.b[5]; + encp[3] = itoa64[i&0x3f]; i >>= 6; + encp[2] = itoa64[i&0x3f]; i >>= 6; + encp[1] = itoa64[i&0x3f]; i >>= 6; + encp[0] = itoa64[i]; encp += 4; + i = ((long)((rsltblock.b[6])<<8) | rsltblock.b[7])<<2; + encp[2] = itoa64[i&0x3f]; i >>= 6; + encp[1] = itoa64[i&0x3f]; i >>= 6; + encp[0] = itoa64[i]; + + encp[3] = 0; + + return (cryptresult); +} + +/* + * Set up the key schedule from the key. + */ +void +des_setkey(const char *key) +{ + des_setkey_r(key, &default_crypt_data); +} + +void +des_setkey_r(const char *key, struct crypt_data *data) +{ + register DCL_BLOCK(K, K0, K1); + register C_block *ptabp; + register int i; + + if (!des_ready) { + memset(data, 0, sizeof(*data)); + init_des(data); + des_ready = 1; + } + + PERM6464(K,K0,K1,(unsigned char *)key,(C_block *)PC1ROT); + key = (char *)&KS[0]; + STORE(K&~0x03030303L, K0&~0x03030303L, K1, *(C_block *)key); + for (i = 1; i < 16; i++) { + key += sizeof(C_block); + STORE(K,K0,K1,*(C_block *)key); + ptabp = (C_block *)PC2ROT[Rotates[i]-1]; + PERM6464(K,K0,K1,(unsigned char *)key,ptabp); + STORE(K&~0x03030303L, K0&~0x03030303L, K1, *(C_block *)key); + } +} + +/* + * Encrypt (or decrypt if num_iter < 0) the 8 chars at "in" with abs(num_iter) + * iterations of DES, using the given 24-bit salt and the pre-computed key + * schedule, and store the resulting 8 chars at "out" (in == out is permitted). + * + * NOTE: the performance of this routine is critically dependent on your + * compiler and machine architecture. + */ +void +des_cipher(const char *in, char *out, long salt, int num_iter) +{ + des_cipher_r(in, out, salt, num_iter, &default_crypt_data); +} + +void +des_cipher_r(const char *in, char *out, long salt, int num_iter, struct crypt_data *data) +{ + /* variables that we want in registers, most important first */ +#if defined(pdp11) + register int j; +#endif + register long L0, L1, R0, R1, k; + register C_block *kp; + register int ks_inc, loop_count; + C_block B; + + L0 = salt; + TO_SIX_BIT(salt, L0); /* convert to 4*(6+2) format */ + +#if defined(vax) || defined(pdp11) + salt = ~salt; /* "x &~ y" is faster than "x & y". */ +#define SALT (~salt) +#else +#define SALT salt +#endif + +#if defined(MUST_ALIGN) + B.b[0] = in[0]; B.b[1] = in[1]; B.b[2] = in[2]; B.b[3] = in[3]; + B.b[4] = in[4]; B.b[5] = in[5]; B.b[6] = in[6]; B.b[7] = in[7]; + LOAD(L,L0,L1,B); +#else + LOAD(L,L0,L1,*(C_block *)in); +#endif + LOADREG(R,R0,R1,L,L0,L1); + L0 &= 0x55555555L; + L1 &= 0x55555555L; + L0 = (L0 << 1) | L1; /* L0 is the even-numbered input bits */ + R0 &= 0xaaaaaaaaL; + R1 = (R1 >> 1) & 0x55555555L; + L1 = R0 | R1; /* L1 is the odd-numbered input bits */ + STORE(L,L0,L1,B); + PERM3264(L,L0,L1,B.b, (C_block *)IE3264); /* even bits */ + PERM3264(R,R0,R1,B.b+4,(C_block *)IE3264); /* odd bits */ + + if (num_iter >= 0) + { /* encryption */ + kp = &KS[0]; + ks_inc = (int)sizeof(*kp); + } + else + { /* decryption */ + num_iter = -num_iter; + kp = &KS[KS_SIZE-1]; + ks_inc = -(int)sizeof(*kp); + } + + while (--num_iter >= 0) { + loop_count = 8; + do { + +#define SPTAB(t, i) (*(long *)((unsigned char *)(t) + (i)*(sizeof(long)/4))) +#if defined(gould) + /* use this if B.b[i] is evaluated just once ... */ +#define DOXOR(x,y,i) (x)^=SPTAB(SPE[0][(i)],B.b[(i)]); (y)^=SPTAB(SPE[1][(i)],B.b[(i)]); +#else +#if defined(pdp11) + /* use this if your "long" int indexing is slow */ +#define DOXOR(x,y,i) j=B.b[(i)]; (x)^=SPTAB(SPE[0][(i)],j); (y)^=SPTAB(SPE[1][(i)],j); +#else + /* use this if "k" is allocated to a register ... */ +#define DOXOR(x,y,i) k=B.b[(i)]; (x)^=SPTAB(SPE[0][(i)],k); (y)^=SPTAB(SPE[1][(i)],k); +#endif +#endif + +#define CRUNCH(p0, p1, q0, q1) \ + k = ((q0) ^ (q1)) & SALT; \ + B.b32.i0 = k ^ (q0) ^ kp->b32.i0; \ + B.b32.i1 = k ^ (q1) ^ kp->b32.i1; \ + kp = (C_block *)((char *)kp+ks_inc); \ + \ + DOXOR((p0), (p1), 0); \ + DOXOR((p0), (p1), 1); \ + DOXOR((p0), (p1), 2); \ + DOXOR((p0), (p1), 3); \ + DOXOR((p0), (p1), 4); \ + DOXOR((p0), (p1), 5); \ + DOXOR((p0), (p1), 6); \ + DOXOR((p0), (p1), 7); + + CRUNCH(L0, L1, R0, R1); + CRUNCH(R0, R1, L0, L1); + } while (--loop_count != 0); + kp = (C_block *)((char *)kp-(ks_inc*KS_SIZE)); + + + /* swap L and R */ + L0 ^= R0; L1 ^= R1; + R0 ^= L0; R1 ^= L1; + L0 ^= R0; L1 ^= R1; + } + + /* store the encrypted (or decrypted) result */ + L0 = ((L0 >> 3) & 0x0f0f0f0fL) | ((L1 << 1) & 0xf0f0f0f0L); + L1 = ((R0 >> 3) & 0x0f0f0f0fL) | ((R1 << 1) & 0xf0f0f0f0L); + STORE(L,L0,L1,B); + PERM6464(L,L0,L1,B.b, (C_block *)CF6464); +#if defined(MUST_ALIGN) + STORE(L,L0,L1,B); + out[0] = B.b[0]; out[1] = B.b[1]; out[2] = B.b[2]; out[3] = B.b[3]; + out[4] = B.b[4]; out[5] = B.b[5]; out[6] = B.b[6]; out[7] = B.b[7]; +#else + STORE(L,L0,L1,*(C_block *)out); +#endif +} + + +/* + * Initialize various tables. This need only be done once. It could even be + * done at compile time, if the compiler were capable of that sort of thing. + */ +STATIC void +init_des(struct crypt_data *data) +{ + register int i, j; + register long k; + register int tableno; + unsigned char perm[64], tmp32[32]; + + /* + * table that converts chars "./0-9A-Za-z"to integers 0-63. + */ + for (i = 0; i < 64; i++) + a64toi[itoa64[i]] = i; + + /* + * PC1ROT - bit reverse, then PC1, then Rotate, then PC2. + */ + for (i = 0; i < 64; i++) + perm[i] = 0; + for (i = 0; i < 64; i++) { + if ((k = PC2[i]) == 0) + continue; + k += Rotates[0]-1; + if ((k%28) < Rotates[0]) k -= 28; + k = PC1[k]; + if (k > 0) { + k--; + k = (k|07) - (k&07); + k++; + } + perm[i] = (unsigned char)k; + } +#ifdef DEBUG + prtab("pc1tab", perm, 8); +#endif + init_perm(PC1ROT, perm, 8, 8); + + /* + * PC2ROT - PC2 inverse, then Rotate (once or twice), then PC2. + */ + for (j = 0; j < 2; j++) { + unsigned char pc2inv[64]; + for (i = 0; i < 64; i++) + perm[i] = pc2inv[i] = 0; + for (i = 0; i < 64; i++) { + if ((k = PC2[i]) == 0) + continue; + pc2inv[k-1] = i+1; + } + for (i = 0; i < 64; i++) { + if ((k = PC2[i]) == 0) + continue; + k += j; + if ((k%28) <= j) k -= 28; + perm[i] = pc2inv[k]; + } +#ifdef DEBUG + prtab("pc2tab", perm, 8); +#endif + init_perm(PC2ROT[j], perm, 8, 8); + } + + /* + * Bit reverse, then initial permutation, then expansion. + */ + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + k = (j < 2)? 0: IP[ExpandTr[i*6+j-2]-1]; + if (k > 32) + k -= 32; + else if (k > 0) + k--; + if (k > 0) { + k--; + k = (k|07) - (k&07); + k++; + } + perm[i*8+j] = (unsigned char)k; + } + } +#ifdef DEBUG + prtab("ietab", perm, 8); +#endif + init_perm(IE3264, perm, 4, 8); + + /* + * Compression, then final permutation, then bit reverse. + */ + for (i = 0; i < 64; i++) { + k = IP[CIFP[i]-1]; + if (k > 0) { + k--; + k = (k|07) - (k&07); + k++; + } + perm[k-1] = i+1; + } +#ifdef DEBUG + prtab("cftab", perm, 8); +#endif + init_perm(CF6464, perm, 8, 8); + + /* + * SPE table + */ + for (i = 0; i < 48; i++) + perm[i] = P32Tr[ExpandTr[i]-1]; + for (tableno = 0; tableno < 8; tableno++) { + for (j = 0; j < 64; j++) { + k = (((j >> 0) &01) << 5)| + (((j >> 1) &01) << 3)| + (((j >> 2) &01) << 2)| + (((j >> 3) &01) << 1)| + (((j >> 4) &01) << 0)| + (((j >> 5) &01) << 4); + k = S[tableno][k]; + k = (((k >> 3)&01) << 0)| + (((k >> 2)&01) << 1)| + (((k >> 1)&01) << 2)| + (((k >> 0)&01) << 3); + for (i = 0; i < 32; i++) + tmp32[i] = 0; + for (i = 0; i < 4; i++) + tmp32[4 * tableno + i] = (unsigned char)(k >> i) & 01; + k = 0; + for (i = 24; --i >= 0; ) + k = (k<<1) | tmp32[perm[i]-1]; + TO_SIX_BIT(SPE[0][tableno][j], k); + k = 0; + for (i = 24; --i >= 0; ) + k = (k<<1) | tmp32[perm[i+24]-1]; + TO_SIX_BIT(SPE[1][tableno][j], k); + } + } +} + +/* + * Initialize "perm" to represent transformation "p", which rearranges + * (perhaps with expansion and/or contraction) one packed array of bits + * (of size "chars_in" characters) into another array (of size "chars_out" + * characters). + * + * "perm" must be all-zeroes on entry to this routine. + */ +STATIC void +init_perm(C_block perm[64/CHUNKBITS][1<>LGCHUNKBITS; /* which chunk this bit comes from */ + l = 1<<(l&(CHUNKBITS-1)); /* mask for this bit */ + for (j = 0; j < (1<>3] |= 1<<(k&07); + } + } +} + +/* + * "setkey" routine (for backwards compatibility) + */ +void +setkey(const char *key) +{ + setkey_r(key, &default_crypt_data); +} + +void +setkey_r(const char *key, struct crypt_data *data) +{ + register int i, j, k; + C_block keyblock; + + for (i = 0; i < 8; i++) { + k = 0; + for (j = 0; j < 8; j++) { + k <<= 1; + k |= (unsigned char)*key++; + } + keyblock.b[i] = k; + } + des_setkey_r((char *)keyblock.b, data); +} + +/* + * "encrypt" routine (for backwards compatibility) + */ +void +encrypt(char *block, int flag) +{ + encrypt_r(block, flag, &default_crypt_data); +} + +void +encrypt_r(char *block, int flag, struct crypt_data *data) +{ + register int i, j, k; + C_block cblock; + + for (i = 0; i < 8; i++) { + k = 0; + for (j = 0; j < 8; j++) { + k <<= 1; + k |= (unsigned char)*block++; + } + cblock.b[i] = k; + } + des_cipher_r((char *)&cblock, (char *)&cblock, 0L, (flag ? -1: 1), data); + for (i = 7; i >= 0; i--) { + k = cblock.b[i]; + for (j = 7; j >= 0; j--) { + *--block = k&01; + k >>= 1; + } + } +} + +#ifdef DEBUG +STATIC void +prtab(const char *s, const unsigned char *t, int num_rows) +{ + register int i, j; + + (void)printf("%s:\n", s); + for (i = 0; i < num_rows; i++) { + for (j = 0; j < 8; j++) { + (void)printf("%3d", t[i*8+j]); + } + (void)printf("\n"); + } + (void)printf("\n"); +} +#endif -- cgit v1.2.3