2 * Copyright 1985, 1988 by the Massachusetts Institute of Technology.
4 * For copying and distribution information, please
5 * see the file <mit-cpyright.h>.
10 #include <afs/param.h>
15 #include <mit-cpyright.h>
18 #include "des_internal.h"
19 #include "des_prototypes.h"
24 static unsigned char P_temp[32];
25 static afs_uint32 P_prime[4][256];
30 register int i, j, k, m;
31 /* P permutes 32 bit input R1 into 32 bit output R2 */
34 /* flip p into p_temp */
35 for (i = 0; i < 32; i++)
36 P_temp[(int)P[rev_swap_bit_pos_0(i)]] = rev_swap_bit_pos_0(i);
39 * now for each byte of input, figure out all possible combinations
41 for (i = 0; i < 4; i++) { /* each input byte */
42 for (j = 0; j < 256; j++) { /* each possible byte value */
45 /* swap_byte_bits(j); */
46 for (m = 0; m < 8; m++) { /* each bit */
48 /* set output values */
49 P_prime[i][j] |= 1 << P_temp[(i * 8) + m];
55 fprintf(stream, "\n\tstatic afs_uint32 const P_prime[4][256] = {\n\t");
56 for (i = 0; i < 4; i++) {
57 fprintf(stream, "\n{ ");
58 for (j = 0; j < 64; j++) {
59 fprintf(stream, "\n");
60 for (k = 0; k < 4; k++) {
61 fprintf(stream, "0x%08lX",
62 (unsigned long)P_prime[i][j * 4 + k]);
63 if ((j == 63) && (k == 3))
65 if ((i == 3) && (j == 63) && (k == 3))
66 fprintf(stream, "\n};");
68 fprintf(stream, ", ");
74 fprintf(stream, "\n");