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>
13 #include "mit-cpyright.h"
16 #include "des_internal.h"
17 #include "des_prototypes.h"
22 static unsigned char P_temp[32];
23 static afs_uint32 P_prime[4][256];
29 /* P permutes 32 bit input R1 into 32 bit output R2 */
32 /* flip p into p_temp */
33 for (i = 0; i < 32; i++)
34 P_temp[(int)P[rev_swap_bit_pos_0(i)]] = rev_swap_bit_pos_0(i);
37 * now for each byte of input, figure out all possible combinations
39 for (i = 0; i < 4; i++) { /* each input byte */
40 for (j = 0; j < 256; j++) { /* each possible byte value */
43 /* swap_byte_bits(j); */
44 for (m = 0; m < 8; m++) { /* each bit */
46 /* set output values */
47 P_prime[i][j] |= 1 << P_temp[(i * 8) + m];
53 fprintf(stream, "\n\tstatic afs_uint32 const P_prime[4][256] = {\n\t");
54 for (i = 0; i < 4; i++) {
55 fprintf(stream, "\n{ ");
56 for (j = 0; j < 64; j++) {
57 fprintf(stream, "\n");
58 for (k = 0; k < 4; k++) {
59 fprintf(stream, "0x%08lX",
60 (unsigned long)P_prime[i][j * 4 + k]);
61 if ((j == 63) && (k == 3))
63 if ((i == 3) && (j == 63) && (k == 3))
64 fprintf(stream, "\n};");
66 fprintf(stream, ", ");
72 fprintf(stream, "\n");