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JS DES crypt
/* JavaScript password hash generator.
* $Id: pwd.js,v 1.5 2004/10/09 09:41:38 emikulic Exp $
*
* Copyright (c) 2004, Emil Mikulic.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of other contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
const ascii64 =
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
/* Emil's adaptation of crypt() from FreeSec: libcrypt
* Taken from $OpenBSD: crypt.c,v 1.18 2003/08/12 01:22:17 deraadt Exp $
* Original license:
* Copyright (c) 1994 David Burren
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. 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.
*
* The JavaScript adaptation is copyright (c) 2004 Emil Mikulic.
*/
function ascii_to_bin(ch)
{
var lz = "z".charCodeAt(0),
la = "a".charCodeAt(0),
uz = "Z".charCodeAt(0),
ua = "A".charCodeAt(0),
ni = "9".charCodeAt(0),
dt = ".".charCodeAt(0);
if (ch > lz) return 0;
if (ch >= la) return (ch - la + 38);
if (ch > uz) return 0;
if (ch >= ua) return (ch - ua + 12);
if (ch > ni) return 0;
if (ch >= dt) return (ch - dt);
return 0;
}
const des_IP = [
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
];
const des_key_perm = [
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
];
const des_key_shifts = [ 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 ];
const des_comp_perm = [
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
];
const des_sbox = [
[
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
]];
const des_pbox = [
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
];
const des_bits32 = [
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
];
const bits28 = [
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
];
const bits24 = [
0x00800000, 0x00400000, 0x00200000, 0x00100000,
0x00080000, 0x00040000, 0x00020000, 0x00010000,
0x00008000, 0x00004000, 0x00002000, 0x00001000,
0x00000800, 0x00000400, 0x00000200, 0x00000100,
0x00000080, 0x00000040, 0x00000020, 0x00000010,
0x00000008, 0x00000004, 0x00000002, 0x00000001
];
const des_bits8 = [ 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 ];
var u_sbox = new Array(8),
m_sbox = new Array(4),
init_perm = new Array(64),
final_perm = new Array(64),
inv_key_perm = new Array(64),
u_key_perm = new Array(56),
inv_comp_perm = new Array(56),
ip_maskl = new Array(8),
ip_maskr = new Array(8),
fp_maskl = new Array(8),
fp_maskr = new Array(8),
un_pbox = new Array(32),
psbox = new Array(4),
key_perm_maskl = new Array(8),
key_perm_maskr = new Array(8),
comp_maskl = new Array(8),
comp_maskr = new Array(8);
function des_init()
{
/*
* Invert the S-boxes, reordering the input bits.
*/
for (i = 0; i < 8; i++) {
u_sbox[i] = new Array(64);
for (j = 0; j < 64; j++) {
b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
u_sbox[i][j] = des_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++) {
m_sbox[b] = new Array(4096);
for (i = 0; i < 64; i++)
for (j = 0; j < 64; j++)
m_sbox[b][(i << 6) | j] =
(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] = des_IP[i] - 1] = i;
inv_key_perm[i] = 255;
}
/*
* Invert the key permutation and initialise the inverted key
* compression permutation.
*/
for (i = 0; i < 56; i++) {
u_key_perm[i] = des_key_perm[i] - 1;
inv_key_perm[des_key_perm[i] - 1] = i;
inv_comp_perm[i] = 255;
}
/*
* Invert the key compression permutation.
*/
for (i = 0; i < 48; i++) {
inv_comp_perm[des_comp_perm[i] - 1] = 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++) {
ip_maskl[k] = new Array(256);
ip_maskr[k] = new Array(256);
fp_maskl[k] = new Array(256);
fp_maskr[k] = new Array(256);
key_perm_maskl[k] = new Array(128);
key_perm_maskr[k] = new Array(128);
comp_maskl[k] = new Array(128);
comp_maskr[k] = new Array(128);
for (i = 0; i < 256; i++) {
ip_maskl[k][i] = 0;
ip_maskr[k][i] = 0;
fp_maskl[k][i] = 0;
fp_maskr[k][i] = 0;
for (j = 0; j < 8; j++) {
inbit = 8 * k + j;
if (i & des_bits8[j]) {
if ((obit = init_perm[inbit]) < 32)
ip_maskl[k][i] |=
des_bits32[obit];
else
ip_maskr[k][i] |=
des_bits32[obit-32];
if ((obit = final_perm[inbit]) < 32)
fp_maskl[k][i] |=
des_bits32[obit];
else
fp_maskr[k][i] |=
des_bits32[obit - 32];
}
}
}
for (i = 0; i < 128; i++) {
key_perm_maskl[k][i] = 0;
key_perm_maskr[k][i] = 0;
for (j = 0; j < 7; j++) {
inbit = 8 * k + j;
if (i & des_bits8[j + 1]) {
if ((obit = inv_key_perm[inbit]) == 255)
continue;
if (obit < 28)
key_perm_maskl[k][i] |=
bits28[obit];
else
key_perm_maskr[k][i] |=
bits28[obit - 28];
}
}
comp_maskl[k][i] = 0;
comp_maskr[k][i] = 0;
for (j = 0; j < 7; j++) {
inbit = 7 * k + j;
if (i & des_bits8[j + 1]) {
if ((obit=inv_comp_perm[inbit]) == 255)
continue;
if (obit < 24)
comp_maskl[k][i] |=
bits24[obit];
else
comp_maskr[k][i] |=
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[des_pbox[i] - 1] = i;
for (b = 0; b < 4; b++) {
psbox[b] = new Array(256);
for (i = 0; i < 256; i++) {
psbox[b][i] = 0;
for (j = 0; j < 8; j++) {
if (i & des_bits8[j])
psbox[b][i] |=
des_bits32[un_pbox[8 * b + j]];
}
}
}
}
var en_keysl = new Array(16),
en_keysr = new Array(16);
function des_setkey(key)
{
var rawkey0, rawkey1, k0, k1;
rawkey0 = (key[0] << 24) |
(key[1] << 16) |
(key[2] << 8) |
(key[3] << 0);
rawkey1 = (key[4] << 24) |
(key[5] << 16) |
(key[6] << 8) |
(key[7] << 0);
/* 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. */
var shifts = 0, round;
for (round = 0; round < 16; round++) {
var t0, t1;
shifts += des_key_shifts[round];
t0 = (k0 << shifts) | (k0 >>> (28 - shifts));
t1 = (k1 << shifts) | (k1 >>> (28 - shifts));
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];
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];
}
}
var saltbits;
function des_setup_salt(salt)
{
saltbits = 0;
saltbit = 1;
obit = 0x800000;
for (i = 0; i < 24; i++) {
if (salt & saltbit)
saltbits |= obit;
saltbit <<= 1;
obit >>= 1;
}
}
var des_r0, des_r1;
function des_do_des()
{
var l, r, f, r48l, r48r;
var count = 25;
/* Don't bother with initial permutation. */
l = r = 0;
while (count--) {
/* Do each round. */
kl = 0;
kr = 0;
var 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 ^ en_keysl[ kl++ ];
r48r ^= f ^ en_keysr[ 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;
}
/* Final permutation (inverse of IP). */
des_r0 = 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];
des_r1 = 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];
}
function descrypt(key, salt_str)
{
var keybuf = new Array(8);
var output = salt_str.slice(0,2);
q = 0;
keypos = 0;
while (q < 8) {
keybuf[q] = key.charCodeAt(keypos) << 1;
q++;
if (keypos < key.length) keypos++;
}
des_setkey(keybuf);
/* This is the "old style" DES crypt. */
var salt = (ascii_to_bin(salt_str.charCodeAt(1)) << 6) |
ascii_to_bin(salt_str.charCodeAt(0));
des_setup_salt(salt);
des_do_des();
l = (des_r0 >>> 8);
output += ascii64.charAt( (l >>> 18) & 0x3f );
output += ascii64.charAt( (l >>> 12) & 0x3f );
output += ascii64.charAt( (l >>> 6) & 0x3f );
output += ascii64.charAt( (l >>> 0) & 0x3f );
l = (des_r0 << 16) | ((des_r1 >>> 16) & 0xffff);
output += ascii64.charAt( (l >>> 18) & 0x3f );
output += ascii64.charAt( (l >>> 12) & 0x3f );
output += ascii64.charAt( (l >>> 6) & 0x3f );
output += ascii64.charAt( (l >>> 0) & 0x3f );
l = (des_r1 << 2);
output += ascii64.charAt( (l >>> 12) & 0x3f );
output += ascii64.charAt( (l >>> 6) & 0x3f );
output += ascii64.charAt( (l >>> 0) & 0x3f );
return output;
}
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