2 * "enigma.c" is in file cbw.tar from
3 * anonymous FTP host watmsg.waterloo.edu: pub/crypt/cbw.tar.Z
5 * A one-rotor machine designed along the lines of Enigma
6 * but considerably trivialized.
8 * A public-domain replacement for the UNIX "crypt" command.
10 * Upgraded to function properly on 64-bit machines.
13 #include <sys/cdefs.h>
14 __FBSDID("$FreeBSD$");
16 #include <sys/types.h>
23 #define MINUSKVAR "CrYpTkEy"
45 strlcpy(salt, pw, sizeof(salt));
46 memcpy(buf, crypt(pw, salt), sizeof(buf));
49 seed = seed*buf[i] + i;
50 for(i=0;i<ROTORSZ;i++) {
54 for(i=0;i<ROTORSZ;i++) {
55 seed = 5*seed + buf[i%13];
58 ic = (rnd&MASK)%(k+1);
63 if(t3[k]!=0) continue;
65 while(t3[ic]!=0) ic = (ic+1) % k;
69 for(i=0;i<ROTORSZ;i++)
74 main(int argc, char *argv[])
76 int i, n1, n2, nr1, nr2;
77 int secureflg = 0, kflag = 0;
80 if (argc > 1 && argv[1][0] == '-') {
81 if (argv[1][1] == 's') {
85 } else if (argv[1][1] == 'k') {
92 if ((cp = getenv(MINUSKVAR)) == NULL) {
93 fprintf(stderr, "%s not set\n", MINUSKVAR);
97 } else if (argc != 2) {
98 setup(getpass("Enter key:"));
106 while((i=getchar()) != -1) {
109 nr2 = deck[nr1]&MASK;
113 i = t2[(t3[(t1[(i+nr1)&MASK]+nr2)&MASK]-nr2)&MASK]-nr1;
119 if(n2==ROTORSZ) n2 = 0;
132 shuffle(char deckary[])
136 static int32_t seed = 123;
138 for(i=0;i<ROTORSZ;i++) {
139 seed = 5*seed + buf[i%13];
142 ic = (rnd&MASK)%(k+1);
144 deckary[k] = deckary[ic];