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1.1 ! millert 1: /*
! 2: * X9.9 calculator
! 3: * This software is provided AS IS with no express or implied warranty
! 4: * October 1995, Paul Borman <prb@krystal.com>
! 5: */
! 6: #if defined(KRBDES) && !defined(__unix__)
! 7: #define __unix__
! 8: #endif
! 9: #ifdef __unix__
! 10: #ifdef LITTLE_ENDIAN
! 11: #undef LITTLE_ENDIAN
! 12: #endif
! 13: #include <pwd.h>
! 14: #else
! 15: #include <dos.h>
! 16: #endif
! 17: #include <ctype.h>
! 18: #include <stdio.h>
! 19: #include <stdlib.h>
! 20: #include <string.h>
! 21: #include <unistd.h>
! 22: #include <sys/stat.h>
! 23: extern char *optarg;
! 24:
! 25:
! 26: #ifdef __unix__
! 27: #define KEYFILE ".keyfile.des"
! 28: #define MPL 1024
! 29: #else
! 30: #define KEYFILE "keyfile.des"
! 31: #define MPL 256
! 32: #endif
! 33:
! 34: #define HEXDIGITS "0123456789abcdef"
! 35: #define DECDIGITS "0123456789012345"
! 36:
! 37: char *digits = HEXDIGITS;
! 38:
! 39: #ifdef KRBDES
! 40: #include <des.h>
! 41: #define setkey dessetkey
! 42:
! 43: void desinit(int i) { ; }
! 44: void dessetkey(char ks[16][8], char key[8])
! 45: {
! 46: des_key_schedule *k = (des_key_schedule *)ks;
! 47: des_fixup_key_parity((des_cblock *)key);
! 48: des_key_sched((des_cblock *)key, *k);
! 49: }
! 50: void endes(char ks[16][8], char key[8])
! 51: {
! 52: des_cblock cb;
! 53: des_key_schedule *k = (des_key_schedule *)ks;
! 54:
! 55: des_ecb_encrypt((des_cblock *)key, &cb, *k, DES_ENCRYPT);
! 56: memcpy(key, &cb, 8);
! 57: }
! 58: #endif
! 59:
! 60: void predict(char ks[16][8], char *chal, int cnt);
! 61:
! 62: int
! 63: main(int ac, char **av)
! 64: {
! 65: int i;
! 66: char ks[16][8];
! 67: char buf[256];
! 68: char key[8];
! 69: char _keyfile[MPL];
! 70: char *keyfile = 0;
! 71: FILE *fp;
! 72: int init = 0;
! 73: int hex = 1;
! 74: int cnt = 1;
! 75: unsigned long pin;
! 76: #ifdef __unix__
! 77: struct passwd *pwd;
! 78: #endif
! 79:
! 80: while ((i = getopt(ac, av, "dk:in:")) != EOF)
! 81: switch (i) {
! 82: case 'k':
! 83: keyfile = optarg;
! 84: break;
! 85: case 'i':
! 86: init = 1;
! 87: break;
! 88: case 'd':
! 89: hex = 0;
! 90: break;
! 91: case 'n':
! 92: cnt = atoi(optarg);
! 93: if (cnt <= 0) {
! 94: fprintf(stderr, "%s: invalid count\n", optarg);
! 95: exit(1);
! 96: }
! 97: break;
! 98: default:
! 99: fprintf(stderr, "Usage: x99token [-n cnt] [-h] [-k keyfile]\n"
! 100: " x99token -i [-k keyfile]\n");
! 101: exit(1);
! 102: }
! 103:
! 104: desinit(0);
! 105:
! 106: if (!keyfile) {
! 107: #ifdef __unix__
! 108: if ((pwd = getpwuid(getuid())) == 0) {
! 109: fprintf(stderr, "Say, just who are you, anyhow?\n");
! 110: exit(1);
! 111: }
! 112: sprintf(_keyfile, "%s/%s", pwd->pw_dir, KEYFILE);
! 113: keyfile = _keyfile;
! 114: #else
! 115: keyfile = KEYFILE;
! 116: #endif
! 117: }
! 118:
! 119: if (init) {
! 120: #ifdef __unix__
! 121: strcpy(buf, (char *)getpass("Enter Key: "));
! 122: #else
! 123: printf("Enter key: ");
! 124: if (fgets(buf, sizeof(buf), stdin) == NULL)
! 125: exit(0);
! 126: #endif
! 127: } else if ((fp = fopen(keyfile, "r")) == NULL) {
! 128: fprintf(stderr, "Failed to open %s\n", keyfile);
! 129: exit(1);
! 130: } else {
! 131: if (fgets(buf, sizeof(buf), fp) == NULL) {
! 132: fprintf(stderr, "No key in %s\n", keyfile);
! 133: exit(1);
! 134: }
! 135: fclose(fp);
! 136: }
! 137:
! 138: memset(key, 0, sizeof(key));
! 139: if (init && buf[3] == ' ') {
! 140: char *b = buf;
! 141: /* Assume octal input */
! 142: for (i = 0; i < 8; ++i) {
! 143: if (!*b) {
! 144: fprintf(stderr, "%s: invalid key\n", buf);
! 145: }
! 146: while (isdigit(*b))
! 147: key[i] = key[i] << 3 | *b++ - '0';
! 148: while (*b && !isdigit(*b))
! 149: ++b;
! 150: }
! 151: } else
! 152: for (i = 0; i < 16; ++i) {
! 153: int d;
! 154:
! 155: if (islower(buf[i]))
! 156: buf[i] = toupper(buf[i]);
! 157: if (buf[i] >= '0' && buf[i] <= '9')
! 158: d = buf[i] - '0';
! 159: else if (buf[i] >= 'A' && buf[i] <= 'F')
! 160: d = buf[i] - 'A' + 10;
! 161: else {
! 162: fprintf(stderr, "invalid key: %s\n", buf);
! 163: exit(1);
! 164: }
! 165: key[i>>1] |= d << ((i & 1) ? 0 : 4);
! 166: }
! 167:
! 168: #ifdef __unix__
! 169: strcpy(buf, (char *)getpass("Enter Pin: "));
! 170: #else
! 171: printf("Enter Pin: ");
! 172: if (fgets(buf, sizeof(buf), stdin) == NULL)
! 173: exit(0);
! 174: #endif
! 175:
! 176: for (i = 0; buf[i] && buf[i] != '\n'; ++i)
! 177: if (isdigit(buf[i]))
! 178: pin = pin * 16 + buf[i] - '0' + 1;
! 179:
! 180: if ((pin & 0xffff0000L) == 0)
! 181: pin |= pin << 16;
! 182:
! 183: for (i = 0; i < 8; ++i)
! 184: key[0] ^= (pin >> ((i * 7) % 26)) & 0x7f;
! 185:
! 186: if (init) {
! 187: if ((fp = fopen(keyfile, "w")) == NULL) {
! 188: fprintf(stderr, "could not open %s for writing\n",
! 189: keyfile);
! 190: exit(1);
! 191: }
! 192: for (i = 0; i < 8; ++i) {
! 193: fprintf(fp, "%c", digits[(key[i]>>4)&0xf]);
! 194: fprintf(fp, "%c", digits[(key[i]>>0)&0xf]);
! 195: }
! 196: fprintf(fp, "\n");
! 197: fclose(fp);
! 198: #ifdef __unix__
! 199: chmod(keyfile, 0600);
! 200: #else
! 201: dos_setfileattr(keyfile, FA_HIDDEN | FA_SYSTEM);
! 202: #endif
! 203: exit(0);
! 204: }
! 205:
! 206: setkey(ks, key);
! 207:
! 208: printf("Enter challange: ");
! 209: memset(buf, 0, sizeof(buf));
! 210: if (fgets(buf, sizeof(buf), stdin) == NULL)
! 211: exit(0);
! 212:
! 213: for (i = 0; i < 8; ++i)
! 214: if (buf[i] == '\n')
! 215: buf[i] = '\0';
! 216:
! 217: if (!hex)
! 218: digits = DECDIGITS;
! 219:
! 220: predict(ks, buf, cnt);
! 221:
! 222: exit(0);
! 223: }
! 224:
! 225: void
! 226: predict(char ks[16][8], char *chal, int cnt)
! 227: {
! 228: int i;
! 229:
! 230: while (cnt-- > 0) {
! 231: printf("%.8s: ", chal);
! 232: endes(ks, chal);
! 233: for (i = 0; i < 4; ++i) {
! 234: printf("%c", digits[(chal[i]>>4) & 0xf]);
! 235: printf("%c", digits[(chal[i]>>0) & 0xf]);
! 236: }
! 237: printf("\n");
! 238: for (i = 0; i < 8; ++i) {
! 239: if ((chal[i] &= 0xf) > 9)
! 240: chal[i] -= 10;
! 241: chal[i] |= 0x30;
! 242: }
! 243: }
! 244: }