[d309eb3] | 1 | /* This file is stolen and slightly modified code */ |
---|
| 2 | |
---|
| 3 | /* zcrypt.c -- Read in a data stream from stdin & dump a decrypted/encrypted * |
---|
| 4 | * datastream. Reads the string to make the key from from the first * |
---|
| 5 | * parameter. Encrypts or decrypts according to -d or -e flag. (-e is * |
---|
| 6 | * default.) Will invoke zwrite if the -c option is provided for * |
---|
| 7 | * encryption. If a zephyr class is specified & the keyfile name omitted * |
---|
| 8 | * the ~/.crypt-table will be checked for "crypt-classname" and then * |
---|
| 9 | * "crypt-default" for the keyfile name. */ |
---|
| 10 | |
---|
[e3869df] | 11 | static const char fileIdent[] = "$Id$"; |
---|
| 12 | |
---|
[d309eb3] | 13 | #include <stdio.h> |
---|
| 14 | #include <stdlib.h> |
---|
| 15 | #include <string.h> |
---|
| 16 | #include <sys/types.h> |
---|
| 17 | #include <sys/wait.h> |
---|
[ac70242] | 18 | #include "owl.h" |
---|
[d309eb3] | 19 | |
---|
[c86a35c] | 20 | #ifdef OWL_ENABLE_ZCRYPT |
---|
[c269e22] | 21 | |
---|
[d309eb3] | 22 | #define BASE_CODE 70 |
---|
| 23 | #define LAST_CODE (BASE_CODE + 15) |
---|
| 24 | #define OUTPUT_BLOCK_SIZE 16 |
---|
| 25 | #include <unistd.h> |
---|
| 26 | #include <sys/types.h> |
---|
| 27 | #include <des.h> |
---|
| 28 | |
---|
| 29 | #define MAX_KEY 128 |
---|
| 30 | |
---|
| 31 | #ifndef TRUE |
---|
| 32 | #define TRUE -1 |
---|
| 33 | #endif |
---|
| 34 | #ifndef FALSE |
---|
| 35 | #define FALSE 0 |
---|
| 36 | #endif |
---|
| 37 | |
---|
| 38 | #define ZWRITE_OPT_NOAUTH (1<<0) |
---|
| 39 | #define ZWRITE_OPT_SIGNATURE (1<<1) |
---|
| 40 | #define ZWRITE_OPT_IGNOREVARS (1<<2) |
---|
| 41 | #define ZWRITE_OPT_VERBOSE (1<<3) |
---|
| 42 | #define ZWRITE_OPT_QUIET (1<<4) |
---|
| 43 | #define ZCRYPT_OPT_MESSAGE (1<<5) |
---|
| 44 | #define ZCRYPT_OPT_IGNOREDOT (1<<6) |
---|
| 45 | |
---|
| 46 | typedef struct |
---|
| 47 | { |
---|
| 48 | int flags; |
---|
| 49 | char *signature; |
---|
| 50 | char *message; |
---|
| 51 | } ZWRITEOPTIONS; |
---|
| 52 | |
---|
| 53 | char *GetZephyrVarKeyFile(char *whoami, char *class, char *instance); |
---|
| 54 | char *BuildArgString(char **argv, int start, int end); |
---|
[f87c490] | 55 | static int do_encrypt(char *keystring, int zephyr, char *class, char *instance, ZWRITEOPTIONS *zoptions, char* keyfile); |
---|
[d309eb3] | 56 | int do_decrypt(char *keystring); |
---|
| 57 | |
---|
[ac70242] | 58 | #ifndef HAVE_DES_ECB_ENCRYPT_PROTO |
---|
[e3869df] | 59 | int des_ecb_encrypt(char [], char [], des_key_schedule, int); |
---|
[ac70242] | 60 | #endif |
---|
[e3869df] | 61 | |
---|
[d309eb3] | 62 | #define M_NONE 0 |
---|
| 63 | #define M_ZEPHYR_ENCRYPT 1 |
---|
| 64 | #define M_DECRYPT 2 |
---|
| 65 | #define M_ENCRYPT 3 |
---|
| 66 | #define M_RANDOMIZE 4 |
---|
| 67 | #define M_SETKEY 5 |
---|
| 68 | |
---|
| 69 | int zcrypt(int argc, char *argv[]) { |
---|
| 70 | char *fname = NULL; |
---|
| 71 | int error = FALSE; |
---|
| 72 | int zephyr = FALSE; |
---|
| 73 | char *class = NULL, *instance = NULL; |
---|
| 74 | int mode = M_NONE; |
---|
| 75 | |
---|
| 76 | extern int optind, opterr; |
---|
| 77 | extern char *optarg; |
---|
| 78 | char c; |
---|
| 79 | |
---|
| 80 | int messageflag = FALSE; |
---|
| 81 | ZWRITEOPTIONS zoptions; |
---|
| 82 | zoptions.flags = 0; |
---|
| 83 | |
---|
| 84 | while ((c = getopt(argc, argv, "ZDERSF:c:i:advqtluons:f:m")) != (char)EOF) { |
---|
| 85 | switch(c) { |
---|
| 86 | case 'Z': |
---|
| 87 | /* Zephyr encrypt */ |
---|
| 88 | mode = M_ZEPHYR_ENCRYPT; |
---|
| 89 | break; |
---|
| 90 | case 'D': |
---|
| 91 | /* Decrypt */ |
---|
| 92 | mode = M_DECRYPT; |
---|
| 93 | break; |
---|
| 94 | case 'E': |
---|
| 95 | /* Encrypt */ |
---|
| 96 | mode = M_ENCRYPT; |
---|
| 97 | break; |
---|
| 98 | case 'R': |
---|
| 99 | /* Randomize the keyfile */ |
---|
| 100 | mode = M_RANDOMIZE; |
---|
| 101 | break; |
---|
| 102 | case 'S': |
---|
| 103 | /* Set a new key value from stdin */ |
---|
| 104 | mode = M_SETKEY; |
---|
| 105 | break; |
---|
| 106 | case 'F': |
---|
| 107 | /* Specify the keyfile explicitly */ |
---|
| 108 | if (fname != NULL) error = TRUE; |
---|
| 109 | fname = optarg; |
---|
| 110 | break; |
---|
| 111 | case 'c': |
---|
| 112 | /* Zwrite/zcrypt: class name */ |
---|
| 113 | if (class != NULL) error = TRUE; |
---|
| 114 | class = optarg; |
---|
| 115 | break; |
---|
| 116 | case 'i': |
---|
| 117 | /* Zwrite/zcrypt: instance name */ |
---|
| 118 | if (instance != NULL) error = TRUE; |
---|
| 119 | instance = optarg; |
---|
| 120 | break; |
---|
| 121 | case 'a': |
---|
| 122 | /* Zwrite: authenticate (default) */ |
---|
| 123 | zoptions.flags &= ~ZWRITE_OPT_NOAUTH; |
---|
| 124 | break; |
---|
| 125 | case 'd': |
---|
| 126 | /* Zwrite: do not authenticate */ |
---|
| 127 | zoptions.flags |= ZWRITE_OPT_NOAUTH; |
---|
| 128 | break; |
---|
| 129 | case 'v': |
---|
| 130 | /* Zwrite: verbose */ |
---|
| 131 | zoptions.flags |= ZWRITE_OPT_VERBOSE; |
---|
| 132 | break; |
---|
| 133 | case 'q': |
---|
| 134 | /* Zwrite: quiet */ |
---|
| 135 | zoptions.flags |= ZWRITE_OPT_QUIET; |
---|
| 136 | break; |
---|
| 137 | case 't': |
---|
| 138 | /* Zwrite: no expand tabs (ignored) */ |
---|
| 139 | break; |
---|
| 140 | case 'l': |
---|
| 141 | /* Zwrite: ignore '.' on a line by itself (ignored) */ |
---|
| 142 | zoptions.flags |= ZCRYPT_OPT_IGNOREDOT; |
---|
| 143 | break; |
---|
| 144 | case 'u': |
---|
| 145 | /* Zwrite: urgent message */ |
---|
| 146 | instance = "URGENT"; |
---|
| 147 | break; |
---|
| 148 | case 'o': |
---|
| 149 | /* Zwrite: ignore zephyr variables zwrite-class, zwrite-inst, */ |
---|
| 150 | /* zwrite-opcode */ |
---|
| 151 | zoptions.flags |= ZWRITE_OPT_IGNOREVARS; |
---|
| 152 | break; |
---|
| 153 | case 'n': |
---|
| 154 | /* Zwrite: prevent PING message (always used) */ |
---|
| 155 | break; |
---|
| 156 | case 's': |
---|
| 157 | /* Zwrite: signature */ |
---|
| 158 | zoptions.flags |= ZWRITE_OPT_SIGNATURE; |
---|
| 159 | zoptions.signature = optarg; |
---|
| 160 | break; |
---|
| 161 | case 'f': |
---|
| 162 | /* Zwrite: file system specification (ignored) */ |
---|
| 163 | break; |
---|
| 164 | case 'm': |
---|
| 165 | /* Message on rest of line */ |
---|
| 166 | messageflag = TRUE; |
---|
| 167 | break; |
---|
| 168 | case '?': |
---|
| 169 | error = TRUE; |
---|
| 170 | break; |
---|
| 171 | } |
---|
| 172 | if (error || messageflag) break; |
---|
| 173 | } |
---|
| 174 | |
---|
| 175 | if (class != NULL || instance != NULL) { |
---|
| 176 | zephyr = TRUE; |
---|
| 177 | } |
---|
| 178 | |
---|
| 179 | if (messageflag) { |
---|
| 180 | zoptions.flags |= ZCRYPT_OPT_MESSAGE; |
---|
| 181 | zoptions.message = BuildArgString(argv, optind, argc); |
---|
| 182 | if (!zoptions.message) |
---|
| 183 | { |
---|
| 184 | printf("Memory allocation error.\n"); |
---|
| 185 | error = TRUE; |
---|
| 186 | } |
---|
| 187 | } else if (optind < argc) { |
---|
| 188 | error = TRUE; |
---|
| 189 | } |
---|
| 190 | |
---|
| 191 | if (mode == M_NONE) mode = (zephyr?M_ZEPHYR_ENCRYPT:M_ENCRYPT); |
---|
| 192 | |
---|
| 193 | if (mode == M_ZEPHYR_ENCRYPT && !zephyr) error = TRUE; |
---|
| 194 | |
---|
| 195 | if (!error && fname == NULL && (class != NULL || instance != NULL)) { |
---|
| 196 | fname = GetZephyrVarKeyFile(argv[0], class, instance); |
---|
| 197 | } |
---|
| 198 | |
---|
| 199 | |
---|
| 200 | if (error || fname == NULL) { |
---|
| 201 | printf("Usage: %s [-Z|-D|-E|-R|-S] [-F Keyfile] [-c class] [-i instance]\n", argv[0]); |
---|
| 202 | printf(" [-advqtluon] [-s signature] [-f arg] [-m message]\n"); |
---|
| 203 | printf(" One or more of class, instance, and keyfile must be specified.\n"); |
---|
| 204 | } else { |
---|
| 205 | if (mode == M_RANDOMIZE) { |
---|
| 206 | /* Choose a new, random key */ |
---|
| 207 | /* |
---|
| 208 | FILE *fkey = fopen(fname, "w"); |
---|
| 209 | if (!fkey) |
---|
| 210 | printf("Could not open key file for writing: %s\n", fname); |
---|
| 211 | else |
---|
| 212 | { |
---|
| 213 | char string[100]; |
---|
| 214 | fputs(fkey, string); |
---|
| 215 | fclose(fkey); |
---|
| 216 | } |
---|
| 217 | */ |
---|
| 218 | printf("Feature not yet implemented.\n"); |
---|
| 219 | } else if (mode == M_SETKEY) { |
---|
| 220 | /* Set a new, user-entered key */ |
---|
| 221 | char newkey[MAX_KEY]; |
---|
| 222 | FILE *fkey; |
---|
| 223 | |
---|
| 224 | if (isatty(0)) { |
---|
| 225 | printf("Enter new key: "); |
---|
| 226 | /* Really should read without echo!!! */ |
---|
| 227 | fgets(newkey, MAX_KEY - 1, stdin); |
---|
| 228 | } else { |
---|
| 229 | fgets(newkey, MAX_KEY - 1, stdin); |
---|
| 230 | } |
---|
| 231 | |
---|
| 232 | fkey = fopen(fname, "w"); |
---|
| 233 | if (!fkey) { |
---|
| 234 | printf("Could not open key file for writing: %s\n", fname); |
---|
| 235 | } else { |
---|
| 236 | if (fputs(newkey, fkey) != strlen(newkey) || putc('\n', fkey) != '\n') { |
---|
| 237 | printf("Error writing to key file.\n"); |
---|
| 238 | fclose(fkey); |
---|
| 239 | } else { |
---|
| 240 | fclose(fkey); |
---|
| 241 | printf("Key update complete.\n"); |
---|
| 242 | } |
---|
| 243 | } |
---|
| 244 | } else { |
---|
| 245 | /* Encrypt/decrypt */ |
---|
| 246 | FILE *fkey = fopen(fname, "r"); |
---|
| 247 | if (!fkey) { |
---|
| 248 | printf("Could not open key file: %s\n", fname); |
---|
| 249 | } else { |
---|
| 250 | char keystring[MAX_KEY]; |
---|
| 251 | fgets(keystring, MAX_KEY-1, fkey); |
---|
| 252 | if (mode == M_ZEPHYR_ENCRYPT || mode == M_ENCRYPT) { |
---|
| 253 | do_encrypt(keystring, (mode == M_ZEPHYR_ENCRYPT), class, instance, |
---|
| 254 | &zoptions, fname); |
---|
| 255 | } else { |
---|
| 256 | do_decrypt(keystring); |
---|
| 257 | } |
---|
| 258 | fclose(fkey); |
---|
| 259 | } |
---|
| 260 | } |
---|
| 261 | } |
---|
| 262 | |
---|
| 263 | /* Always print the **END** message if -D is specified. */ |
---|
| 264 | if (mode == M_DECRYPT) printf("**END**\n"); |
---|
| 265 | |
---|
| 266 | exit(0); |
---|
| 267 | } |
---|
| 268 | |
---|
[9ceee9d] | 269 | /* The 'owl_zcrypt_decrypt' function was written by kretch for Owl. |
---|
| 270 | * Decrypt the message in 'in' on class 'class' and instance |
---|
| 271 | * 'instance' and leave the result in 'out'. Out must be a buffer |
---|
| 272 | * allocated by the caller. |
---|
| 273 | * |
---|
| 274 | * return 0 on success, otherwise -1 |
---|
| 275 | */ |
---|
| 276 | int owl_zcrypt_decrypt(char *out, char *in, char *class, char *instance) { |
---|
[d309eb3] | 277 | char *fname, keystring[MAX_KEY], *inptr, *endptr; |
---|
| 278 | FILE *fkey; |
---|
| 279 | des_cblock key; |
---|
| 280 | des_key_schedule schedule; |
---|
| 281 | char input[8], output[9]; |
---|
| 282 | int i, c1, c2; |
---|
| 283 | |
---|
| 284 | fname=GetZephyrVarKeyFile("zcrypt", class, instance); |
---|
[9ceee9d] | 285 | if (!fname) return(-1); |
---|
[d309eb3] | 286 | fkey=fopen(fname, "r"); |
---|
| 287 | if (!fkey) return(-1); |
---|
| 288 | fgets(keystring, MAX_KEY-1, fkey); |
---|
| 289 | fclose(fkey); |
---|
| 290 | |
---|
| 291 | strcpy(out, ""); |
---|
| 292 | |
---|
| 293 | output[0] = '\0'; /* In case no message at all */ |
---|
| 294 | output[8] = '\0'; /* NULL at end will limit string length to 8 */ |
---|
| 295 | |
---|
| 296 | des_string_to_key(keystring, key); |
---|
| 297 | des_key_sched(key, schedule); |
---|
| 298 | |
---|
| 299 | inptr=in; |
---|
| 300 | endptr=in+strlen(in)-1; |
---|
| 301 | while (inptr<endptr) { |
---|
| 302 | for (i=0; i<8; i++) { |
---|
| 303 | c1=(inptr[0])-BASE_CODE; |
---|
| 304 | c2=(inptr[1])-BASE_CODE; |
---|
| 305 | input[i]=c1 * 0x10 + c2; |
---|
| 306 | inptr+=2; |
---|
| 307 | } |
---|
| 308 | des_ecb_encrypt(input, output, schedule, FALSE); |
---|
| 309 | strcat(out, output); |
---|
| 310 | } |
---|
| 311 | |
---|
| 312 | if (output[0]) { |
---|
| 313 | if (output[strlen(output)-1] != '\n') { |
---|
| 314 | strcat(out, "\n"); |
---|
| 315 | } |
---|
| 316 | } else { |
---|
| 317 | strcat(out, "\n"); |
---|
| 318 | } |
---|
| 319 | return(0); |
---|
| 320 | } |
---|
| 321 | |
---|
[9ceee9d] | 322 | int owl_zcrypt_encrypt(char *out, char *in, char *class, char *instance) { |
---|
| 323 | /* static int do_encrypt(char *keystring, int zephyr, char *class, char *instance, ZWRITEOPTIONS *zoptions, char* keyfile) { */ |
---|
| 324 | char *fname, keystring[MAX_KEY]; |
---|
| 325 | FILE *fkey; |
---|
| 326 | des_cblock key; |
---|
| 327 | des_key_schedule schedule; |
---|
| 328 | char input[8], output[8]; |
---|
| 329 | int size, length, i; |
---|
| 330 | char *inbuff = NULL, *inptr; |
---|
| 331 | int use_buffer = FALSE; |
---|
| 332 | int num_blocks=0, last_block_size=0; |
---|
| 333 | |
---|
| 334 | fname=GetZephyrVarKeyFile("zcrypt", class, instance); |
---|
| 335 | if (!fname) return(-1); |
---|
| 336 | fkey=fopen(fname, "r"); |
---|
| 337 | if (!fkey) return(-1); |
---|
| 338 | fgets(keystring, MAX_KEY-1, fkey); |
---|
| 339 | fclose(fkey); |
---|
| 340 | |
---|
| 341 | des_string_to_key(keystring, key); |
---|
| 342 | des_key_sched(key, schedule); |
---|
| 343 | |
---|
| 344 | inbuff=in; |
---|
| 345 | length=strlen(inbuff); |
---|
| 346 | num_blocks=(length+7)/8; |
---|
| 347 | last_block_size=((length+7)%8)+1; |
---|
| 348 | use_buffer=TRUE; |
---|
| 349 | |
---|
| 350 | strcpy(out, ""); |
---|
| 351 | |
---|
| 352 | inptr=inbuff; |
---|
| 353 | while (TRUE) { |
---|
| 354 | /* Get 8 bytes from buffer */ |
---|
| 355 | if (num_blocks > 1) { |
---|
| 356 | size = 8; |
---|
| 357 | memcpy(input, inptr, size); |
---|
| 358 | inptr+=8; |
---|
| 359 | num_blocks--; |
---|
| 360 | } else if (num_blocks == 1) { |
---|
| 361 | size=last_block_size; |
---|
| 362 | memcpy(input, inptr, size); |
---|
| 363 | num_blocks--; |
---|
| 364 | } else { |
---|
| 365 | size=0; |
---|
| 366 | } |
---|
| 367 | |
---|
| 368 | /* Check for EOF and pad the string to 8 chars, if needed */ |
---|
| 369 | if (size == 0) break; /* END OF INPUT: BREAK FROM while LOOP! */ |
---|
| 370 | |
---|
| 371 | if (size<8) memset(input + size, 0, 8 - size); |
---|
| 372 | |
---|
| 373 | /* Encrypt and output the block */ |
---|
| 374 | des_ecb_encrypt(input, output, schedule, TRUE); |
---|
| 375 | |
---|
| 376 | for (i = 0; i < 8; i++) { |
---|
| 377 | sprintf(out, "%s%c", out, ((output[i] & 0xf0) >> 4) + BASE_CODE); |
---|
| 378 | sprintf(out, "%s%c", out, (output[i] & 0x0f) + BASE_CODE); |
---|
| 379 | } |
---|
| 380 | |
---|
| 381 | if (size < 8) break; |
---|
| 382 | } |
---|
[e3869df] | 383 | return(0); |
---|
[d309eb3] | 384 | } |
---|
| 385 | |
---|
| 386 | /* Build a space-separated string from argv from elements between start * |
---|
| 387 | * and end - 1. malloc()'s the returned string. */ |
---|
| 388 | char *BuildArgString(char **argv, int start, int end) { |
---|
| 389 | int len = 1; |
---|
| 390 | int i; |
---|
| 391 | char *result; |
---|
| 392 | |
---|
| 393 | /* Compute the length of the string. (Plus 1 or 2) */ |
---|
| 394 | for (i = start; i < end; i++) { |
---|
| 395 | len += strlen(argv[i]) + 1; |
---|
| 396 | } |
---|
| 397 | |
---|
| 398 | /* Allocate memory */ |
---|
| 399 | result = (char *)malloc(len); |
---|
| 400 | if (result) { |
---|
| 401 | /* Build the string */ |
---|
| 402 | char *ptr = result; |
---|
| 403 | /* Start with an empty string, in case nothing is copied. */ |
---|
| 404 | *ptr = '\0'; |
---|
| 405 | /* Copy the arguments */ |
---|
| 406 | for (i = start; i < end; i++) { |
---|
| 407 | char *temp = argv[i]; |
---|
| 408 | /* Add a space, if not the first argument */ |
---|
| 409 | if (i != start) *ptr++ = ' '; |
---|
| 410 | /* Copy argv[i], leaving ptr pointing to the '\0' copied from temp */ |
---|
[e3869df] | 411 | while ((*ptr = *temp++)!=0) { |
---|
[d309eb3] | 412 | ptr++; |
---|
| 413 | } |
---|
| 414 | } |
---|
| 415 | } |
---|
| 416 | |
---|
| 417 | return(result); |
---|
| 418 | } |
---|
| 419 | |
---|
| 420 | #define MAX_BUFF 258 |
---|
| 421 | #define MAX_SEARCH 3 |
---|
| 422 | /* Find the class/instance in the .crypt-table */ |
---|
| 423 | char *GetZephyrVarKeyFile(char *whoami, char *class, char *instance) { |
---|
[e3869df] | 424 | char *keyfile = NULL; |
---|
[d309eb3] | 425 | char varname[MAX_SEARCH][128]; |
---|
| 426 | int length[MAX_SEARCH], i; |
---|
| 427 | char buffer[MAX_BUFF]; |
---|
| 428 | char filename[MAX_BUFF]; |
---|
| 429 | char result[MAX_SEARCH][MAX_BUFF]; |
---|
| 430 | int numsearch = 0; |
---|
| 431 | FILE *fsearch; |
---|
| 432 | |
---|
| 433 | /* Determine names to look for in .crypt-table */ |
---|
| 434 | if (instance) { |
---|
[9ceee9d] | 435 | sprintf(varname[numsearch++], "crypt-%s-%s:", (class?class:"message"), instance); |
---|
[d309eb3] | 436 | } |
---|
| 437 | if (class) { |
---|
| 438 | sprintf(varname[numsearch++], "crypt-%s:", class); |
---|
| 439 | } |
---|
| 440 | sprintf(varname[numsearch++], "crypt-default:"); |
---|
| 441 | |
---|
| 442 | /* Setup the result array, and determine string lengths */ |
---|
| 443 | for (i = 0; i < numsearch; i++) { |
---|
| 444 | result[i][0] = '\0'; |
---|
| 445 | length[i] = strlen(varname[i]); |
---|
| 446 | } |
---|
| 447 | |
---|
| 448 | /* Open~/.crypt-table */ |
---|
| 449 | sprintf(filename, "%s/.crypt-table", getenv("HOME")); |
---|
| 450 | fsearch = fopen(filename, "r"); |
---|
| 451 | if (fsearch) { |
---|
| 452 | /* Scan file for a match */ |
---|
| 453 | while (!feof(fsearch)) { |
---|
| 454 | fgets(buffer, MAX_BUFF - 3, fsearch); |
---|
| 455 | for (i = 0; i < numsearch; i++) { |
---|
| 456 | if (strncasecmp(varname[i], buffer, length[i]) == 0) { |
---|
| 457 | int j; |
---|
| 458 | for (j = length[i]; buffer[j] == ' '; j++) |
---|
| 459 | ; |
---|
| 460 | strcpy(result[i], &buffer[j]); |
---|
| 461 | if (*result[i]) { |
---|
| 462 | if (result[i][strlen(result[i])-1] == '\n') { |
---|
| 463 | result[i][strlen(result[i])-1] = '\0'; |
---|
| 464 | } |
---|
| 465 | } |
---|
| 466 | } |
---|
| 467 | } |
---|
| 468 | } |
---|
| 469 | |
---|
| 470 | /* Pick the "best" match found */ |
---|
| 471 | keyfile = NULL; |
---|
| 472 | for (i = 0; i < numsearch; i++) { |
---|
| 473 | if (*result[i]) { |
---|
| 474 | keyfile = result[i]; |
---|
| 475 | break; |
---|
| 476 | } |
---|
| 477 | } |
---|
| 478 | |
---|
| 479 | if (keyfile == NULL) { |
---|
[9ceee9d] | 480 | /* printf("Could not find key table entry.\n"); */ |
---|
[d309eb3] | 481 | } else { |
---|
| 482 | /* Prepare result to be returned */ |
---|
| 483 | char *temp = keyfile; |
---|
| 484 | keyfile = (char *)malloc(strlen(temp) + 1); |
---|
| 485 | if (keyfile) { |
---|
| 486 | strcpy(keyfile, temp); |
---|
| 487 | } else { |
---|
[9ceee9d] | 488 | /* printf("Memory allocation error.\n"); */ |
---|
[d309eb3] | 489 | } |
---|
| 490 | } |
---|
| 491 | |
---|
| 492 | fclose(fsearch); |
---|
| 493 | } else { |
---|
[9ceee9d] | 494 | /* printf("Could not open key table file: %s\n", filename); */ |
---|
[d309eb3] | 495 | } |
---|
| 496 | |
---|
| 497 | return(keyfile); |
---|
| 498 | } |
---|
| 499 | |
---|
| 500 | static pid_t zephyrpipe_pid = 0; |
---|
| 501 | |
---|
| 502 | /* Open a pipe to zwrite */ |
---|
[0ba59d2] | 503 | static FILE *GetZephyrPipe(char *class, char *instance, ZWRITEOPTIONS *zoptions) { |
---|
[d309eb3] | 504 | int fildes[2]; |
---|
| 505 | pid_t pid; |
---|
| 506 | FILE *result; |
---|
| 507 | char *argv[20]; |
---|
| 508 | int argc = 0; |
---|
| 509 | |
---|
| 510 | if (pipe(fildes) < 0) return(NULL); |
---|
| 511 | pid = fork(); |
---|
| 512 | |
---|
| 513 | if (pid < 0) { |
---|
| 514 | /* Error: clean up */ |
---|
| 515 | close(fildes[0]); |
---|
| 516 | close(fildes[1]); |
---|
| 517 | result = NULL; |
---|
| 518 | } else if (pid == 0) { |
---|
| 519 | /* Setup child process */ |
---|
| 520 | argv[argc++] = "zwrite"; |
---|
| 521 | argv[argc++] = "-n"; /* Always send without ping */ |
---|
| 522 | if (class) { |
---|
| 523 | argv[argc++] = "-c"; |
---|
| 524 | argv[argc++] = class; |
---|
| 525 | } |
---|
| 526 | if (instance) { |
---|
| 527 | argv[argc++] = "-i"; |
---|
| 528 | argv[argc++] = instance; |
---|
| 529 | } |
---|
| 530 | if (zoptions->flags & ZWRITE_OPT_NOAUTH) argv[argc++] = "-d"; |
---|
| 531 | if (zoptions->flags & ZWRITE_OPT_QUIET) argv[argc++] = "-q"; |
---|
| 532 | if (zoptions->flags & ZWRITE_OPT_VERBOSE) argv[argc++] = "-v"; |
---|
| 533 | if (zoptions->flags & ZWRITE_OPT_SIGNATURE) { |
---|
| 534 | argv[argc++] = "-s"; |
---|
| 535 | argv[argc++] = zoptions->signature; |
---|
| 536 | } |
---|
| 537 | argv[argc++] = "-O"; |
---|
| 538 | argv[argc++] = "crypt"; |
---|
| 539 | argv[argc] = NULL; |
---|
| 540 | close(fildes[1]); |
---|
| 541 | if (fildes[0] != STDIN_FILENO) { |
---|
| 542 | if (dup2(fildes[0], STDIN_FILENO) != STDIN_FILENO) exit(0); |
---|
| 543 | close(fildes[0]); |
---|
| 544 | } |
---|
| 545 | close(fildes[0]); |
---|
| 546 | execvp(argv[0], argv); |
---|
| 547 | printf("Exec error: could not run zwrite\n"); |
---|
| 548 | exit(0); |
---|
| 549 | } else { |
---|
| 550 | close(fildes[0]); |
---|
| 551 | /* Create a FILE * for the zwrite pipe */ |
---|
| 552 | result = (FILE *)fdopen(fildes[1], "w"); |
---|
| 553 | zephyrpipe_pid = pid; |
---|
| 554 | } |
---|
| 555 | |
---|
| 556 | return(result); |
---|
| 557 | } |
---|
| 558 | |
---|
| 559 | /* Close the pipe to zwrite */ |
---|
| 560 | void CloseZephyrPipe(FILE *pipe) { |
---|
| 561 | fclose(pipe); |
---|
| 562 | waitpid(zephyrpipe_pid, NULL, 0); |
---|
| 563 | zephyrpipe_pid = 0; |
---|
| 564 | } |
---|
| 565 | |
---|
| 566 | #define MAX_RESULT 2048 |
---|
| 567 | |
---|
| 568 | |
---|
| 569 | void block_to_ascii(char *output, FILE *outfile) { |
---|
| 570 | int i; |
---|
| 571 | for (i = 0; i < 8; i++) { |
---|
| 572 | putc(((output[i] & 0xf0) >> 4) + BASE_CODE, outfile); |
---|
| 573 | putc( (output[i] & 0x0f) + BASE_CODE, outfile); |
---|
| 574 | } |
---|
| 575 | } |
---|
| 576 | |
---|
| 577 | #define MAX_LINE 128 |
---|
| 578 | |
---|
| 579 | /* Encrypt stdin, with prompt if isatty, and send to stdout, or to zwrite |
---|
| 580 | if zephyr is set. */ |
---|
[0ba59d2] | 581 | static int do_encrypt(char *keystring, int zephyr, char *class, char *instance, ZWRITEOPTIONS *zoptions, char* keyfile) { |
---|
[d309eb3] | 582 | des_cblock key; |
---|
| 583 | des_key_schedule schedule; |
---|
| 584 | char input[8], output[8]; |
---|
| 585 | int size; |
---|
| 586 | FILE *outfile = stdout; |
---|
| 587 | int error = FALSE; |
---|
| 588 | char *inbuff = NULL, *inptr; |
---|
| 589 | int freein = FALSE; |
---|
| 590 | int use_buffer = FALSE; |
---|
[e3869df] | 591 | int num_blocks=0, last_block_size=0; |
---|
[d309eb3] | 592 | |
---|
| 593 | des_string_to_key(keystring, key); |
---|
| 594 | des_key_sched(key, schedule); |
---|
| 595 | |
---|
| 596 | if (zephyr) { |
---|
| 597 | if (zoptions->flags & ZCRYPT_OPT_MESSAGE) { |
---|
| 598 | /* Use the -m message */ |
---|
| 599 | int length; |
---|
| 600 | inbuff = zoptions->message; |
---|
| 601 | length = strlen(inbuff); |
---|
| 602 | num_blocks = (length + 7) / 8; |
---|
| 603 | last_block_size = ((length + 7) % 8) + 1; |
---|
| 604 | use_buffer = TRUE; |
---|
| 605 | } else if (isatty(0)) { |
---|
| 606 | /* tty input, so show the "Type your message now..." message */ |
---|
| 607 | if (zoptions->flags & ZCRYPT_OPT_IGNOREDOT) { |
---|
| 608 | printf("Type your message now. End with the end-of-file character.\n"); |
---|
| 609 | } else { |
---|
| 610 | printf("Type your message now. End with control-D or a dot on a line by itself.\n"); |
---|
| 611 | } |
---|
| 612 | use_buffer = TRUE; |
---|
| 613 | if ((inptr = inbuff = (char *)malloc(MAX_RESULT)) == NULL) { |
---|
| 614 | printf("Memory allocation error\n"); |
---|
| 615 | return FALSE; |
---|
| 616 | } |
---|
| 617 | while (inptr - inbuff < MAX_RESULT - MAX_LINE - 20) { |
---|
| 618 | fgets(inptr, MAX_LINE, stdin); |
---|
| 619 | if (inptr[0]) { |
---|
| 620 | if (inptr[0] == '.' && inptr[1] == '\n' && |
---|
| 621 | !(zoptions->flags & ZCRYPT_OPT_IGNOREDOT)) { |
---|
| 622 | inptr[0] = '\0'; |
---|
| 623 | break; |
---|
| 624 | } else { |
---|
| 625 | inptr += strlen(inptr); |
---|
| 626 | } |
---|
| 627 | } else { |
---|
| 628 | break; |
---|
| 629 | } |
---|
| 630 | } |
---|
| 631 | num_blocks = (inptr - inbuff + 7) / 8; |
---|
| 632 | last_block_size = ((inptr - inbuff + 7) % 8) + 1; |
---|
| 633 | freein = TRUE; |
---|
| 634 | } |
---|
| 635 | |
---|
| 636 | /* if (zephyr) */ |
---|
| 637 | outfile = GetZephyrPipe(class, instance, zoptions); |
---|
| 638 | if (!outfile) { |
---|
| 639 | printf("Could not run zwrite\n"); |
---|
| 640 | if (freein && inbuff) { |
---|
| 641 | free(inbuff); |
---|
| 642 | } |
---|
| 643 | return(FALSE); |
---|
| 644 | } |
---|
| 645 | } |
---|
| 646 | |
---|
| 647 | inptr = inbuff; |
---|
| 648 | |
---|
| 649 | /* Encrypt the input (inbuff or stdin) and send it to outfile */ |
---|
| 650 | while (TRUE) { |
---|
| 651 | if (use_buffer) { |
---|
| 652 | /* Get 8 bytes from buffer */ |
---|
| 653 | if (num_blocks > 1) { |
---|
| 654 | size = 8; |
---|
| 655 | memcpy(input, inptr, size); |
---|
| 656 | inptr += 8; |
---|
| 657 | num_blocks--; |
---|
| 658 | } else if (num_blocks == 1) { |
---|
| 659 | size = last_block_size; |
---|
| 660 | memcpy(input, inptr, size); |
---|
| 661 | num_blocks--; |
---|
| 662 | } else { |
---|
| 663 | size = 0; |
---|
| 664 | } |
---|
| 665 | } else { |
---|
| 666 | /* Get 8 bytes from stdin */ |
---|
| 667 | size = fread(input, 1, 8, stdin); |
---|
| 668 | } |
---|
| 669 | |
---|
| 670 | /* Check for EOF and pad the string to 8 chars, if needed */ |
---|
| 671 | if (size == 0) break; /* END OF INPUT: BREAK FROM while LOOP! */ |
---|
| 672 | |
---|
| 673 | if (size < 8) memset(input + size, 0, 8 - size); |
---|
| 674 | |
---|
| 675 | /* Encrypt and output the block */ |
---|
| 676 | des_ecb_encrypt(input, output, schedule, TRUE); |
---|
| 677 | block_to_ascii(output, outfile); |
---|
| 678 | |
---|
| 679 | if (size < 8) break; |
---|
| 680 | } |
---|
| 681 | |
---|
| 682 | /* Close out the output */ |
---|
| 683 | if (!error) putc('\n', outfile); |
---|
| 684 | if (zephyr) CloseZephyrPipe(outfile); |
---|
| 685 | |
---|
| 686 | /* Free the input buffer, if necessary */ |
---|
| 687 | if (freein && inbuff) free(inbuff); |
---|
| 688 | |
---|
| 689 | return(!error); |
---|
| 690 | } |
---|
| 691 | |
---|
| 692 | /* Read a half-byte from stdin, skipping invalid characters. Returns -1 |
---|
| 693 | if at EOF or file error */ |
---|
| 694 | int read_ascii_nybble() { |
---|
| 695 | char c; |
---|
| 696 | |
---|
| 697 | while (TRUE) { |
---|
| 698 | if (fread(&c, 1, 1, stdin) == 0) { |
---|
| 699 | return(-1); |
---|
| 700 | } else if (c >= BASE_CODE && c <= LAST_CODE) { |
---|
| 701 | return(c - BASE_CODE); |
---|
| 702 | } |
---|
| 703 | } |
---|
| 704 | } |
---|
| 705 | |
---|
| 706 | /* Read both halves of the byte and return the single byte. Returns -1 |
---|
| 707 | if at EOF or file error. */ |
---|
| 708 | int read_ascii_byte() { |
---|
| 709 | int c1, c2; |
---|
| 710 | c1 = read_ascii_nybble(); |
---|
| 711 | if (c1 >= 0) { |
---|
| 712 | c2 = read_ascii_nybble(); |
---|
| 713 | if (c2 >= 0) { |
---|
| 714 | return c1 * 0x10 + c2; |
---|
| 715 | } |
---|
| 716 | } |
---|
| 717 | return(-1); |
---|
| 718 | } |
---|
| 719 | |
---|
| 720 | /* Read an 8-byte DES block from stdin */ |
---|
| 721 | int read_ascii_block(char *input) { |
---|
| 722 | int c, i; |
---|
| 723 | |
---|
| 724 | for (i = 0; i < 8; i++) { |
---|
| 725 | c = read_ascii_byte(); |
---|
| 726 | if (c < 0) return(FALSE); |
---|
| 727 | input[i] = c; |
---|
| 728 | } |
---|
| 729 | |
---|
| 730 | return(TRUE); |
---|
| 731 | } |
---|
| 732 | |
---|
| 733 | /* Decrypt stdin */ |
---|
| 734 | int do_decrypt(char *keystring) { |
---|
| 735 | des_cblock key; |
---|
| 736 | des_key_schedule schedule; |
---|
| 737 | char input[8], output[9]; |
---|
| 738 | |
---|
| 739 | output[0] = '\0'; /* In case no message at all */ |
---|
| 740 | output[8] = '\0'; /* NULL at end will limit string length to 8 */ |
---|
| 741 | |
---|
| 742 | des_string_to_key(keystring, key); |
---|
| 743 | des_key_sched(key, schedule); |
---|
| 744 | |
---|
| 745 | while (read_ascii_block(input)) { |
---|
| 746 | des_ecb_encrypt(input, output, schedule, FALSE); |
---|
| 747 | printf("%s", output); |
---|
| 748 | } |
---|
| 749 | |
---|
| 750 | if (output[0]) { |
---|
| 751 | if (output[strlen(output)-1] != '\n') { |
---|
| 752 | printf("\n"); |
---|
| 753 | } |
---|
| 754 | } else { |
---|
| 755 | printf("\n"); |
---|
| 756 | } |
---|
| 757 | return(0); |
---|
| 758 | } |
---|
[c269e22] | 759 | |
---|
| 760 | #endif |
---|