com.softicar.platform.common.security.crypt.UnixCryptAlgorithm Maven / Gradle / Ivy
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package com.softicar.platform.common.security.crypt;
/**
* Java-based implementation of the unix crypt(3) command.
*
* This code is based upon C source code written by Eric Young,
* ([email protected]). Java conversion by John F. Dumas, ([email protected]),
* found at http://locutus.kingwoodcable.com/jfd/crypt.html. Minor optimizations
* by Wes Biggs, ([email protected]). Eric's original code is licensed under the BSD
* license. As this is derivative, the same license applies.
*
* Note: Crypt.class is much smaller when compiled with javac -O
*/
class UnixCryptAlgorithm {
private UnixCryptAlgorithm() {
} // defined so class can't be instantiated.
private static final int ITERATIONS = 16;
private static final boolean shifts2[] = { false, false, true, true, true, true, true, true, false, true, true, true, true, true, true, false };
private static final int skb[][] = {
{
/* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
0x00000000,
0x00000010,
0x20000000,
0x20000010,
0x00010000,
0x00010010,
0x20010000,
0x20010010,
0x00000800,
0x00000810,
0x20000800,
0x20000810,
0x00010800,
0x00010810,
0x20010800,
0x20010810,
0x00000020,
0x00000030,
0x20000020,
0x20000030,
0x00010020,
0x00010030,
0x20010020,
0x20010030,
0x00000820,
0x00000830,
0x20000820,
0x20000830,
0x00010820,
0x00010830,
0x20010820,
0x20010830,
0x00080000,
0x00080010,
0x20080000,
0x20080010,
0x00090000,
0x00090010,
0x20090000,
0x20090010,
0x00080800,
0x00080810,
0x20080800,
0x20080810,
0x00090800,
0x00090810,
0x20090800,
0x20090810,
0x00080020,
0x00080030,
0x20080020,
0x20080030,
0x00090020,
0x00090030,
0x20090020,
0x20090030,
0x00080820,
0x00080830,
0x20080820,
0x20080830,
0x00090820,
0x00090830,
0x20090820,
0x20090830, },
{
/* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
0x00000000,
0x02000000,
0x00002000,
0x02002000,
0x00200000,
0x02200000,
0x00202000,
0x02202000,
0x00000004,
0x02000004,
0x00002004,
0x02002004,
0x00200004,
0x02200004,
0x00202004,
0x02202004,
0x00000400,
0x02000400,
0x00002400,
0x02002400,
0x00200400,
0x02200400,
0x00202400,
0x02202400,
0x00000404,
0x02000404,
0x00002404,
0x02002404,
0x00200404,
0x02200404,
0x00202404,
0x02202404,
0x10000000,
0x12000000,
0x10002000,
0x12002000,
0x10200000,
0x12200000,
0x10202000,
0x12202000,
0x10000004,
0x12000004,
0x10002004,
0x12002004,
0x10200004,
0x12200004,
0x10202004,
0x12202004,
0x10000400,
0x12000400,
0x10002400,
0x12002400,
0x10200400,
0x12200400,
0x10202400,
0x12202400,
0x10000404,
0x12000404,
0x10002404,
0x12002404,
0x10200404,
0x12200404,
0x10202404,
0x12202404, },
{
/* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
0x00000000,
0x00000001,
0x00040000,
0x00040001,
0x01000000,
0x01000001,
0x01040000,
0x01040001,
0x00000002,
0x00000003,
0x00040002,
0x00040003,
0x01000002,
0x01000003,
0x01040002,
0x01040003,
0x00000200,
0x00000201,
0x00040200,
0x00040201,
0x01000200,
0x01000201,
0x01040200,
0x01040201,
0x00000202,
0x00000203,
0x00040202,
0x00040203,
0x01000202,
0x01000203,
0x01040202,
0x01040203,
0x08000000,
0x08000001,
0x08040000,
0x08040001,
0x09000000,
0x09000001,
0x09040000,
0x09040001,
0x08000002,
0x08000003,
0x08040002,
0x08040003,
0x09000002,
0x09000003,
0x09040002,
0x09040003,
0x08000200,
0x08000201,
0x08040200,
0x08040201,
0x09000200,
0x09000201,
0x09040200,
0x09040201,
0x08000202,
0x08000203,
0x08040202,
0x08040203,
0x09000202,
0x09000203,
0x09040202,
0x09040203, },
{
/* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
0x00000000,
0x00100000,
0x00000100,
0x00100100,
0x00000008,
0x00100008,
0x00000108,
0x00100108,
0x00001000,
0x00101000,
0x00001100,
0x00101100,
0x00001008,
0x00101008,
0x00001108,
0x00101108,
0x04000000,
0x04100000,
0x04000100,
0x04100100,
0x04000008,
0x04100008,
0x04000108,
0x04100108,
0x04001000,
0x04101000,
0x04001100,
0x04101100,
0x04001008,
0x04101008,
0x04001108,
0x04101108,
0x00020000,
0x00120000,
0x00020100,
0x00120100,
0x00020008,
0x00120008,
0x00020108,
0x00120108,
0x00021000,
0x00121000,
0x00021100,
0x00121100,
0x00021008,
0x00121008,
0x00021108,
0x00121108,
0x04020000,
0x04120000,
0x04020100,
0x04120100,
0x04020008,
0x04120008,
0x04020108,
0x04120108,
0x04021000,
0x04121000,
0x04021100,
0x04121100,
0x04021008,
0x04121008,
0x04021108,
0x04121108, },
{
/* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
0x00000000,
0x10000000,
0x00010000,
0x10010000,
0x00000004,
0x10000004,
0x00010004,
0x10010004,
0x20000000,
0x30000000,
0x20010000,
0x30010000,
0x20000004,
0x30000004,
0x20010004,
0x30010004,
0x00100000,
0x10100000,
0x00110000,
0x10110000,
0x00100004,
0x10100004,
0x00110004,
0x10110004,
0x20100000,
0x30100000,
0x20110000,
0x30110000,
0x20100004,
0x30100004,
0x20110004,
0x30110004,
0x00001000,
0x10001000,
0x00011000,
0x10011000,
0x00001004,
0x10001004,
0x00011004,
0x10011004,
0x20001000,
0x30001000,
0x20011000,
0x30011000,
0x20001004,
0x30001004,
0x20011004,
0x30011004,
0x00101000,
0x10101000,
0x00111000,
0x10111000,
0x00101004,
0x10101004,
0x00111004,
0x10111004,
0x20101000,
0x30101000,
0x20111000,
0x30111000,
0x20101004,
0x30101004,
0x20111004,
0x30111004, },
{
/* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
0x00000000,
0x08000000,
0x00000008,
0x08000008,
0x00000400,
0x08000400,
0x00000408,
0x08000408,
0x00020000,
0x08020000,
0x00020008,
0x08020008,
0x00020400,
0x08020400,
0x00020408,
0x08020408,
0x00000001,
0x08000001,
0x00000009,
0x08000009,
0x00000401,
0x08000401,
0x00000409,
0x08000409,
0x00020001,
0x08020001,
0x00020009,
0x08020009,
0x00020401,
0x08020401,
0x00020409,
0x08020409,
0x02000000,
0x0A000000,
0x02000008,
0x0A000008,
0x02000400,
0x0A000400,
0x02000408,
0x0A000408,
0x02020000,
0x0A020000,
0x02020008,
0x0A020008,
0x02020400,
0x0A020400,
0x02020408,
0x0A020408,
0x02000001,
0x0A000001,
0x02000009,
0x0A000009,
0x02000401,
0x0A000401,
0x02000409,
0x0A000409,
0x02020001,
0x0A020001,
0x02020009,
0x0A020009,
0x02020401,
0x0A020401,
0x02020409,
0x0A020409, },
{
/* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
0x00000000,
0x00000100,
0x00080000,
0x00080100,
0x01000000,
0x01000100,
0x01080000,
0x01080100,
0x00000010,
0x00000110,
0x00080010,
0x00080110,
0x01000010,
0x01000110,
0x01080010,
0x01080110,
0x00200000,
0x00200100,
0x00280000,
0x00280100,
0x01200000,
0x01200100,
0x01280000,
0x01280100,
0x00200010,
0x00200110,
0x00280010,
0x00280110,
0x01200010,
0x01200110,
0x01280010,
0x01280110,
0x00000200,
0x00000300,
0x00080200,
0x00080300,
0x01000200,
0x01000300,
0x01080200,
0x01080300,
0x00000210,
0x00000310,
0x00080210,
0x00080310,
0x01000210,
0x01000310,
0x01080210,
0x01080310,
0x00200200,
0x00200300,
0x00280200,
0x00280300,
0x01200200,
0x01200300,
0x01280200,
0x01280300,
0x00200210,
0x00200310,
0x00280210,
0x00280310,
0x01200210,
0x01200310,
0x01280210,
0x01280310, },
{
/* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
0x00000000,
0x04000000,
0x00040000,
0x04040000,
0x00000002,
0x04000002,
0x00040002,
0x04040002,
0x00002000,
0x04002000,
0x00042000,
0x04042000,
0x00002002,
0x04002002,
0x00042002,
0x04042002,
0x00000020,
0x04000020,
0x00040020,
0x04040020,
0x00000022,
0x04000022,
0x00040022,
0x04040022,
0x00002020,
0x04002020,
0x00042020,
0x04042020,
0x00002022,
0x04002022,
0x00042022,
0x04042022,
0x00000800,
0x04000800,
0x00040800,
0x04040800,
0x00000802,
0x04000802,
0x00040802,
0x04040802,
0x00002800,
0x04002800,
0x00042800,
0x04042800,
0x00002802,
0x04002802,
0x00042802,
0x04042802,
0x00000820,
0x04000820,
0x00040820,
0x04040820,
0x00000822,
0x04000822,
0x00040822,
0x04040822,
0x00002820,
0x04002820,
0x00042820,
0x04042820,
0x00002822,
0x04002822,
0x00042822,
0x04042822, } };
private static final int SPtrans[][] = {
{
/* nibble 0 */
0x00820200,
0x00020000,
0x80800000,
0x80820200,
0x00800000,
0x80020200,
0x80020000,
0x80800000,
0x80020200,
0x00820200,
0x00820000,
0x80000200,
0x80800200,
0x00800000,
0x00000000,
0x80020000,
0x00020000,
0x80000000,
0x00800200,
0x00020200,
0x80820200,
0x00820000,
0x80000200,
0x00800200,
0x80000000,
0x00000200,
0x00020200,
0x80820000,
0x00000200,
0x80800200,
0x80820000,
0x00000000,
0x00000000,
0x80820200,
0x00800200,
0x80020000,
0x00820200,
0x00020000,
0x80000200,
0x00800200,
0x80820000,
0x00000200,
0x00020200,
0x80800000,
0x80020200,
0x80000000,
0x80800000,
0x00820000,
0x80820200,
0x00020200,
0x00820000,
0x80800200,
0x00800000,
0x80000200,
0x80020000,
0x00000000,
0x00020000,
0x00800000,
0x80800200,
0x00820200,
0x80000000,
0x80820000,
0x00000200,
0x80020200, },
{
/* nibble 1 */
0x10042004,
0x00000000,
0x00042000,
0x10040000,
0x10000004,
0x00002004,
0x10002000,
0x00042000,
0x00002000,
0x10040004,
0x00000004,
0x10002000,
0x00040004,
0x10042000,
0x10040000,
0x00000004,
0x00040000,
0x10002004,
0x10040004,
0x00002000,
0x00042004,
0x10000000,
0x00000000,
0x00040004,
0x10002004,
0x00042004,
0x10042000,
0x10000004,
0x10000000,
0x00040000,
0x00002004,
0x10042004,
0x00040004,
0x10042000,
0x10002000,
0x00042004,
0x10042004,
0x00040004,
0x10000004,
0x00000000,
0x10000000,
0x00002004,
0x00040000,
0x10040004,
0x00002000,
0x10000000,
0x00042004,
0x10002004,
0x10042000,
0x00002000,
0x00000000,
0x10000004,
0x00000004,
0x10042004,
0x00042000,
0x10040000,
0x10040004,
0x00040000,
0x00002004,
0x10002000,
0x10002004,
0x00000004,
0x10040000,
0x00042000, },
{
/* nibble 2 */
0x41000000,
0x01010040,
0x00000040,
0x41000040,
0x40010000,
0x01000000,
0x41000040,
0x00010040,
0x01000040,
0x00010000,
0x01010000,
0x40000000,
0x41010040,
0x40000040,
0x40000000,
0x41010000,
0x00000000,
0x40010000,
0x01010040,
0x00000040,
0x40000040,
0x41010040,
0x00010000,
0x41000000,
0x41010000,
0x01000040,
0x40010040,
0x01010000,
0x00010040,
0x00000000,
0x01000000,
0x40010040,
0x01010040,
0x00000040,
0x40000000,
0x00010000,
0x40000040,
0x40010000,
0x01010000,
0x41000040,
0x00000000,
0x01010040,
0x00010040,
0x41010000,
0x40010000,
0x01000000,
0x41010040,
0x40000000,
0x40010040,
0x41000000,
0x01000000,
0x41010040,
0x00010000,
0x01000040,
0x41000040,
0x00010040,
0x01000040,
0x00000000,
0x41010000,
0x40000040,
0x41000000,
0x40010040,
0x00000040,
0x01010000, },
{
/* nibble 3 */
0x00100402,
0x04000400,
0x00000002,
0x04100402,
0x00000000,
0x04100000,
0x04000402,
0x00100002,
0x04100400,
0x04000002,
0x04000000,
0x00000402,
0x04000002,
0x00100402,
0x00100000,
0x04000000,
0x04100002,
0x00100400,
0x00000400,
0x00000002,
0x00100400,
0x04000402,
0x04100000,
0x00000400,
0x00000402,
0x00000000,
0x00100002,
0x04100400,
0x04000400,
0x04100002,
0x04100402,
0x00100000,
0x04100002,
0x00000402,
0x00100000,
0x04000002,
0x00100400,
0x04000400,
0x00000002,
0x04100000,
0x04000402,
0x00000000,
0x00000400,
0x00100002,
0x00000000,
0x04100002,
0x04100400,
0x00000400,
0x04000000,
0x04100402,
0x00100402,
0x00100000,
0x04100402,
0x00000002,
0x04000400,
0x00100402,
0x00100002,
0x00100400,
0x04100000,
0x04000402,
0x00000402,
0x04000000,
0x04000002,
0x04100400, },
{
/* nibble 4 */
0x02000000,
0x00004000,
0x00000100,
0x02004108,
0x02004008,
0x02000100,
0x00004108,
0x02004000,
0x00004000,
0x00000008,
0x02000008,
0x00004100,
0x02000108,
0x02004008,
0x02004100,
0x00000000,
0x00004100,
0x02000000,
0x00004008,
0x00000108,
0x02000100,
0x00004108,
0x00000000,
0x02000008,
0x00000008,
0x02000108,
0x02004108,
0x00004008,
0x02004000,
0x00000100,
0x00000108,
0x02004100,
0x02004100,
0x02000108,
0x00004008,
0x02004000,
0x00004000,
0x00000008,
0x02000008,
0x02000100,
0x02000000,
0x00004100,
0x02004108,
0x00000000,
0x00004108,
0x02000000,
0x00000100,
0x00004008,
0x02000108,
0x00000100,
0x00000000,
0x02004108,
0x02004008,
0x02004100,
0x00000108,
0x00004000,
0x00004100,
0x02004008,
0x02000100,
0x00000108,
0x00000008,
0x00004108,
0x02004000,
0x02000008, },
{
/* nibble 5 */
0x20000010,
0x00080010,
0x00000000,
0x20080800,
0x00080010,
0x00000800,
0x20000810,
0x00080000,
0x00000810,
0x20080810,
0x00080800,
0x20000000,
0x20000800,
0x20000010,
0x20080000,
0x00080810,
0x00080000,
0x20000810,
0x20080010,
0x00000000,
0x00000800,
0x00000010,
0x20080800,
0x20080010,
0x20080810,
0x20080000,
0x20000000,
0x00000810,
0x00000010,
0x00080800,
0x00080810,
0x20000800,
0x00000810,
0x20000000,
0x20000800,
0x00080810,
0x20080800,
0x00080010,
0x00000000,
0x20000800,
0x20000000,
0x00000800,
0x20080010,
0x00080000,
0x00080010,
0x20080810,
0x00080800,
0x00000010,
0x20080810,
0x00080800,
0x00080000,
0x20000810,
0x20000010,
0x20080000,
0x00080810,
0x00000000,
0x00000800,
0x20000010,
0x20000810,
0x20080800,
0x20080000,
0x00000810,
0x00000010,
0x20080010, },
{
/* nibble 6 */
0x00001000,
0x00000080,
0x00400080,
0x00400001,
0x00401081,
0x00001001,
0x00001080,
0x00000000,
0x00400000,
0x00400081,
0x00000081,
0x00401000,
0x00000001,
0x00401080,
0x00401000,
0x00000081,
0x00400081,
0x00001000,
0x00001001,
0x00401081,
0x00000000,
0x00400080,
0x00400001,
0x00001080,
0x00401001,
0x00001081,
0x00401080,
0x00000001,
0x00001081,
0x00401001,
0x00000080,
0x00400000,
0x00001081,
0x00401000,
0x00401001,
0x00000081,
0x00001000,
0x00000080,
0x00400000,
0x00401001,
0x00400081,
0x00001081,
0x00001080,
0x00000000,
0x00000080,
0x00400001,
0x00000001,
0x00400080,
0x00000000,
0x00400081,
0x00400080,
0x00001080,
0x00000081,
0x00001000,
0x00401081,
0x00400000,
0x00401080,
0x00000001,
0x00001001,
0x00401081,
0x00400001,
0x00401080,
0x00401000,
0x00001001, },
{
/* nibble 7 */
0x08200020,
0x08208000,
0x00008020,
0x00000000,
0x08008000,
0x00200020,
0x08200000,
0x08208020,
0x00000020,
0x08000000,
0x00208000,
0x00008020,
0x00208020,
0x08008020,
0x08000020,
0x08200000,
0x00008000,
0x00208020,
0x00200020,
0x08008000,
0x08208020,
0x08000020,
0x00000000,
0x00208000,
0x08000000,
0x00200000,
0x08008020,
0x08200020,
0x00200000,
0x00008000,
0x08208000,
0x00000020,
0x00200000,
0x00008000,
0x08000020,
0x08208020,
0x00008020,
0x08000000,
0x00000000,
0x00208000,
0x08200020,
0x08008020,
0x08008000,
0x00200020,
0x08208000,
0x00000020,
0x00200020,
0x08008000,
0x08208020,
0x00200000,
0x08200000,
0x08000020,
0x00208000,
0x00008020,
0x08008020,
0x08200000,
0x00000020,
0x08208000,
0x00208020,
0x00000000,
0x08000000,
0x08200020,
0x00008000,
0x00208020 } };
private static final int byteToUnsigned(byte b) {
int value = b;
return (value >= 0)? value : value + 256;
}
private static int fourBytesToInt(byte b[], int offset) {
return byteToUnsigned(b[offset++]) | (byteToUnsigned(b[offset++]) << 8) | (byteToUnsigned(b[offset++]) << 16) | (byteToUnsigned(b[offset]) << 24);
}
private static final void intToFourBytes(int iValue, byte b[], int offset) {
b[offset++] = (byte) ((iValue) & 0xff);
b[offset++] = (byte) ((iValue >>> 8) & 0xff);
b[offset++] = (byte) ((iValue >>> 16) & 0xff);
b[offset] = (byte) ((iValue >>> 24) & 0xff);
}
private static final void PERM_OP(int a, int b, int n, int m, int results[]) {
int t;
t = ((a >>> n) ^ b) & m;
a ^= t << n;
b ^= t;
results[0] = a;
results[1] = b;
}
private static final int HPERM_OP(int a, int n, int m) {
int t;
t = ((a << (16 - n)) ^ a) & m;
a = a ^ t ^ (t >>> (16 - n));
return a;
}
private static int[] des_set_key(byte key[]) {
int schedule[] = new int[ITERATIONS * 2];
int c = fourBytesToInt(key, 0);
int d = fourBytesToInt(key, 4);
int results[] = new int[2];
PERM_OP(d, c, 4, 0x0f0f0f0f, results);
d = results[0];
c = results[1];
c = HPERM_OP(c, -2, 0xcccc0000);
d = HPERM_OP(d, -2, 0xcccc0000);
PERM_OP(d, c, 1, 0x55555555, results);
d = results[0];
c = results[1];
PERM_OP(c, d, 8, 0x00ff00ff, results);
c = results[0];
d = results[1];
PERM_OP(d, c, 1, 0x55555555, results);
d = results[0];
c = results[1];
d = (((d & 0x000000ff) << 16) | (d & 0x0000ff00) | ((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
c &= 0x0fffffff;
int s, t;
int j = 0;
for (int i = 0; i < ITERATIONS; i++) {
if (shifts2[i]) {
c = (c >>> 2) | (c << 26);
d = (d >>> 2) | (d << 26);
} else {
c = (c >>> 1) | (c << 27);
d = (d >>> 1) | (d << 27);
}
c &= 0x0fffffff;
d &= 0x0fffffff;
s = skb[0][(c) & 0x3f] | skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)] | skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]
| skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06) | ((c >>> 22) & 0x38)];
t = skb[4][(d) & 0x3f] | skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)] | skb[6][(d >>> 15) & 0x3f]
| skb[7][((d >>> 21) & 0x0f) | ((d >>> 22) & 0x30)];
schedule[j++] = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff;
s = ((s >>> 16) | (t & 0xffff0000));
s = (s << 4) | (s >>> 28);
schedule[j++] = s & 0xffffffff;
}
return schedule;
}
private static final int D_ENCRYPT(int L, int R, int S, int E0, int E1, int s[]) {
int t, u, v;
v = R ^ (R >>> 16);
u = v & E0;
v = v & E1;
u = (u ^ (u << 16)) ^ R ^ s[S];
t = (v ^ (v << 16)) ^ R ^ s[S + 1];
t = (t >>> 4) | (t << 28);
L ^= SPtrans[1][(t) & 0x3f] | SPtrans[3][(t >>> 8) & 0x3f] | SPtrans[5][(t >>> 16) & 0x3f] | SPtrans[7][(t >>> 24) & 0x3f] | SPtrans[0][(u) & 0x3f]
| SPtrans[2][(u >>> 8) & 0x3f] | SPtrans[4][(u >>> 16) & 0x3f] | SPtrans[6][(u >>> 24) & 0x3f];
return L;
}
private static final int[] body(int schedule[], int Eswap0, int Eswap1) {
int left = 0;
int right = 0;
int t = 0;
for (int j = 0; j < 25; j++) {
for (int i = 0; i < ITERATIONS * 2; i += 4) {
left = D_ENCRYPT(left, right, i, Eswap0, Eswap1, schedule);
right = D_ENCRYPT(right, left, i + 2, Eswap0, Eswap1, schedule);
}
t = left;
left = right;
right = t;
}
t = right;
right = (left >>> 1) | (left << 31);
left = (t >>> 1) | (t << 31);
left &= 0xffffffff;
right &= 0xffffffff;
int results[] = new int[2];
PERM_OP(right, left, 1, 0x55555555, results);
right = results[0];
left = results[1];
PERM_OP(left, right, 8, 0x00ff00ff, results);
left = results[0];
right = results[1];
PERM_OP(right, left, 2, 0x33333333, results);
right = results[0];
left = results[1];
PERM_OP(left, right, 16, 0x0000ffff, results);
left = results[0];
right = results[1];
PERM_OP(right, left, 4, 0x0f0f0f0f, results);
right = results[0];
left = results[1];
int out[] = new int[2];
out[0] = left;
out[1] = right;
return out;
}
public static final String alphabet = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
public static final String crypt(String salt, String original) {
// wwb -- Should do some sanity checks: salt needs to be 2 chars, in alpha.
while (salt.length() < 2) {
salt += "A";
}
char[] buffer = new char[13];
char charZero = salt.charAt(0);
char charOne = salt.charAt(1);
buffer[0] = charZero;
buffer[1] = charOne;
int Eswap0 = alphabet.indexOf(charZero);
int Eswap1 = alphabet.indexOf(charOne) << 4;
byte key[] = new byte[8];
for (int i = 0; i < key.length; i++) {
key[i] = (byte) 0;
}
for (int i = 0; i < key.length && i < original.length(); i++) {
key[i] = (byte) ((original.charAt(i)) << 1);
}
int schedule[] = des_set_key(key);
int out[] = body(schedule, Eswap0, Eswap1);
byte b[] = new byte[9];
intToFourBytes(out[0], b, 0);
intToFourBytes(out[1], b, 4);
b[8] = 0;
for (int i = 2, y = 0, u = 0x80; i < 13; i++) {
for (int j = 0, c = 0; j < 6; j++) {
c <<= 1;
if ((b[y] & u) != 0) {
c |= 1;
}
u >>>= 1;
if (u == 0) {
y++;
u = 0x80;
}
buffer[i] = alphabet.charAt(c);
}
}
return new String(buffer);
}
}