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1.29 ! tb 1: /* $OpenBSD: enc.c,v 1.28 2023/06/11 05:45:20 tb Exp $ */
1.1 jsing 2: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3: * All rights reserved.
4: *
5: * This package is an SSL implementation written
6: * by Eric Young (eay@cryptsoft.com).
7: * The implementation was written so as to conform with Netscapes SSL.
8: *
9: * This library is free for commercial and non-commercial use as long as
10: * the following conditions are aheared to. The following conditions
11: * apply to all code found in this distribution, be it the RC4, RSA,
12: * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13: * included with this distribution is covered by the same copyright terms
14: * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15: *
16: * Copyright remains Eric Young's, and as such any Copyright notices in
17: * the code are not to be removed.
18: * If this package is used in a product, Eric Young should be given attribution
19: * as the author of the parts of the library used.
20: * This can be in the form of a textual message at program startup or
21: * in documentation (online or textual) provided with the package.
22: *
23: * Redistribution and use in source and binary forms, with or without
24: * modification, are permitted provided that the following conditions
25: * are met:
26: * 1. Redistributions of source code must retain the copyright
27: * notice, this list of conditions and the following disclaimer.
28: * 2. Redistributions in binary form must reproduce the above copyright
29: * notice, this list of conditions and the following disclaimer in the
30: * documentation and/or other materials provided with the distribution.
31: * 3. All advertising materials mentioning features or use of this software
32: * must display the following acknowledgement:
33: * "This product includes cryptographic software written by
34: * Eric Young (eay@cryptsoft.com)"
35: * The word 'cryptographic' can be left out if the rouines from the library
36: * being used are not cryptographic related :-).
37: * 4. If you include any Windows specific code (or a derivative thereof) from
38: * the apps directory (application code) you must include an acknowledgement:
39: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40: *
41: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51: * SUCH DAMAGE.
52: *
53: * The licence and distribution terms for any publically available version or
54: * derivative of this code cannot be changed. i.e. this code cannot simply be
55: * copied and put under another distribution licence
56: * [including the GNU Public Licence.]
57: */
58:
59: #include <stdio.h>
60: #include <stdlib.h>
61: #include <string.h>
62:
63: #include "apps.h"
64:
65: #include <openssl/bio.h>
66: #include <openssl/comp.h>
67: #include <openssl/err.h>
68: #include <openssl/evp.h>
69: #include <openssl/objects.h>
70: #include <openssl/pem.h>
71: #include <openssl/x509.h>
72:
73: int set_hex(char *in, unsigned char *out, int size);
74:
75: #define SIZE (512)
76: #define BSIZE (8*1024)
1.4 jsing 77:
78: static struct {
79: int base64;
80: char *bufsize;
81: const EVP_CIPHER *cipher;
82: int debug;
83: int enc;
84: char *hiv;
85: char *hkey;
86: char *hsalt;
87: char *inf;
1.20 jsing 88: int iter;
1.4 jsing 89: char *keyfile;
90: char *keystr;
91: char *md;
92: int nopad;
93: int nosalt;
94: int olb64;
95: char *outf;
96: char *passarg;
1.20 jsing 97: int pbkdf2;
1.4 jsing 98: int printkey;
99: int verbose;
1.27 tb 100: } cfg;
1.4 jsing 101:
102: static int
103: enc_opt_cipher(int argc, char **argv, int *argsused)
104: {
105: char *name = argv[0];
106:
107: if (*name++ != '-')
108: return (1);
109:
110: if (strcmp(name, "none") == 0) {
1.27 tb 111: cfg.cipher = NULL;
1.4 jsing 112: *argsused = 1;
113: return (0);
114: }
115:
1.27 tb 116: if ((cfg.cipher = EVP_get_cipherbyname(name)) != NULL) {
1.4 jsing 117: *argsused = 1;
118: return (0);
119: }
120:
121: return (1);
122: }
123:
1.21 guenther 124: static const struct option enc_options[] = {
1.4 jsing 125: {
126: .name = "A",
127: .desc = "Process base64 data on one line (requires -a)",
128: .type = OPTION_FLAG,
1.27 tb 129: .opt.flag = &cfg.olb64,
1.4 jsing 130: },
131: {
132: .name = "a",
133: .desc = "Perform base64 encoding/decoding (alias -base64)",
134: .type = OPTION_FLAG,
1.27 tb 135: .opt.flag = &cfg.base64,
1.4 jsing 136: },
137: {
138: .name = "base64",
139: .type = OPTION_FLAG,
1.27 tb 140: .opt.flag = &cfg.base64,
1.4 jsing 141: },
142: {
143: .name = "bufsize",
144: .argname = "size",
145: .desc = "Specify the buffer size to use for I/O",
146: .type = OPTION_ARG,
1.27 tb 147: .opt.arg = &cfg.bufsize,
1.4 jsing 148: },
149: {
150: .name = "d",
151: .desc = "Decrypt the input data",
152: .type = OPTION_VALUE,
1.27 tb 153: .opt.value = &cfg.enc,
1.4 jsing 154: .value = 0,
155: },
156: {
157: .name = "debug",
158: .desc = "Print debugging information",
159: .type = OPTION_FLAG,
1.27 tb 160: .opt.flag = &cfg.debug,
1.4 jsing 161: },
162: {
163: .name = "e",
164: .desc = "Encrypt the input data (default)",
165: .type = OPTION_VALUE,
1.27 tb 166: .opt.value = &cfg.enc,
1.4 jsing 167: .value = 1,
168: },
169: {
170: .name = "in",
171: .argname = "file",
172: .desc = "Input file to read from (default stdin)",
173: .type = OPTION_ARG,
1.27 tb 174: .opt.arg = &cfg.inf,
1.4 jsing 175: },
176: {
1.16 naddy 177: .name = "iter",
178: .argname = "iterations",
179: .desc = "Specify iteration count and force use of PBKDF2",
1.19 jsing 180: .type = OPTION_ARG_INT,
1.27 tb 181: .opt.value = &cfg.iter,
1.16 naddy 182: },
183: {
1.4 jsing 184: .name = "iv",
185: .argname = "IV",
1.11 jmc 186: .desc = "IV to use, specified as a hexadecimal string",
1.4 jsing 187: .type = OPTION_ARG,
1.27 tb 188: .opt.arg = &cfg.hiv,
1.4 jsing 189: },
190: {
191: .name = "K",
192: .argname = "key",
1.11 jmc 193: .desc = "Key to use, specified as a hexadecimal string",
1.4 jsing 194: .type = OPTION_ARG,
1.27 tb 195: .opt.arg = &cfg.hkey,
1.4 jsing 196: },
197: {
198: .name = "k", /* Superseded by -pass. */
199: .type = OPTION_ARG,
1.27 tb 200: .opt.arg = &cfg.keystr,
1.4 jsing 201: },
202: {
203: .name = "kfile", /* Superseded by -pass. */
204: .type = OPTION_ARG,
1.27 tb 205: .opt.arg = &cfg.keyfile,
1.4 jsing 206: },
207: {
208: .name = "md",
209: .argname = "digest",
210: .desc = "Digest to use to create a key from the passphrase",
211: .type = OPTION_ARG,
1.27 tb 212: .opt.arg = &cfg.md,
1.4 jsing 213: },
214: {
215: .name = "none",
216: .desc = "Use NULL cipher (no encryption or decryption)",
217: .type = OPTION_ARGV_FUNC,
218: .opt.argvfunc = enc_opt_cipher,
219: },
220: {
221: .name = "nopad",
222: .desc = "Disable standard block padding",
223: .type = OPTION_FLAG,
1.27 tb 224: .opt.flag = &cfg.nopad,
1.4 jsing 225: },
226: {
227: .name = "nosalt",
228: .type = OPTION_VALUE,
1.27 tb 229: .opt.value = &cfg.nosalt,
1.4 jsing 230: .value = 1,
231: },
232: {
233: .name = "out",
234: .argname = "file",
235: .desc = "Output file to write to (default stdout)",
236: .type = OPTION_ARG,
1.27 tb 237: .opt.arg = &cfg.outf,
1.4 jsing 238: },
239: {
240: .name = "P",
241: .desc = "Print out the salt, key and IV used, then exit\n"
242: " (no encryption or decryption is performed)",
243: .type = OPTION_VALUE,
1.27 tb 244: .opt.value = &cfg.printkey,
1.4 jsing 245: .value = 2,
246: },
247: {
248: .name = "p",
249: .desc = "Print out the salt, key and IV used",
250: .type = OPTION_VALUE,
1.27 tb 251: .opt.value = &cfg.printkey,
1.4 jsing 252: .value = 1,
253: },
254: {
255: .name = "pass",
256: .argname = "source",
257: .desc = "Password source",
258: .type = OPTION_ARG,
1.27 tb 259: .opt.arg = &cfg.passarg,
1.4 jsing 260: },
261: {
1.16 naddy 262: .name = "pbkdf2",
263: .desc = "Use the pbkdf2 key derivation function",
264: .type = OPTION_FLAG,
1.27 tb 265: .opt.flag = &cfg.pbkdf2,
1.16 naddy 266: },
267: {
1.4 jsing 268: .name = "S",
269: .argname = "salt",
1.11 jmc 270: .desc = "Salt to use, specified as a hexadecimal string",
1.4 jsing 271: .type = OPTION_ARG,
1.27 tb 272: .opt.arg = &cfg.hsalt,
1.4 jsing 273: },
274: {
275: .name = "salt",
276: .desc = "Use a salt in the key derivation routines (default)",
277: .type = OPTION_VALUE,
1.27 tb 278: .opt.value = &cfg.nosalt,
1.4 jsing 279: .value = 0,
280: },
281: {
282: .name = "v",
283: .desc = "Verbose",
284: .type = OPTION_FLAG,
1.27 tb 285: .opt.flag = &cfg.verbose,
1.4 jsing 286: },
287: {
288: .name = NULL,
289: .type = OPTION_ARGV_FUNC,
290: .opt.argvfunc = enc_opt_cipher,
291: },
292: { NULL },
293: };
1.1 jsing 294:
295: static void
1.26 tb 296: skip_aead_and_xts(const OBJ_NAME *name, void *arg)
297: {
298: const EVP_CIPHER *cipher;
299:
300: if ((cipher = EVP_get_cipherbyname(name->name)) == NULL)
301: return;
302:
303: if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0)
304: return;
305: if (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)
306: return;
307:
308: show_cipher(name, arg);
309: }
310:
311: static void
1.4 jsing 312: enc_usage(void)
313: {
1.18 inoguchi 314: int n = 0;
315:
1.4 jsing 316: fprintf(stderr, "usage: enc -ciphername [-AadePp] [-base64] "
317: "[-bufsize number] [-debug]\n"
1.16 naddy 318: " [-in file] [-iter iterations] [-iv IV] [-K key] "
319: "[-k password]\n"
1.4 jsing 320: " [-kfile file] [-md digest] [-none] [-nopad] [-nosalt]\n"
1.16 naddy 321: " [-out file] [-pass source] [-pbkdf2] [-S salt] [-salt]\n\n");
1.4 jsing 322: options_usage(enc_options);
323: fprintf(stderr, "\n");
324:
325: fprintf(stderr, "Valid ciphername values:\n\n");
1.26 tb 326: OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, skip_aead_and_xts, &n);
1.4 jsing 327: fprintf(stderr, "\n");
1.1 jsing 328: }
329:
330: int
331: enc_main(int argc, char **argv)
332: {
333: static const char magic[] = "Salted__";
334: char mbuf[sizeof magic - 1];
1.4 jsing 335: char *strbuf = NULL, *pass = NULL;
336: unsigned char *buff = NULL;
337: int bsize = BSIZE;
1.1 jsing 338: int ret = 1, inl;
339: unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
340: unsigned char salt[PKCS5_SALT_LEN];
341: EVP_CIPHER_CTX *ctx = NULL;
1.4 jsing 342: const EVP_MD *dgst = NULL;
343: BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL;
344: BIO *rbio = NULL, *wbio = NULL;
1.1 jsing 345: #define PROG_NAME_SIZE 39
346: char pname[PROG_NAME_SIZE + 1];
1.4 jsing 347: int i;
1.8 doug 348:
1.25 joshua 349: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
350: perror("pledge");
351: exit(1);
1.8 doug 352: }
1.4 jsing 353:
1.27 tb 354: memset(&cfg, 0, sizeof(cfg));
355: cfg.enc = 1;
1.1 jsing 356:
357: /* first check the program name */
1.4 jsing 358: program_name(argv[0], pname, sizeof(pname));
359:
1.1 jsing 360: if (strcmp(pname, "base64") == 0)
1.27 tb 361: cfg.base64 = 1;
1.4 jsing 362:
1.27 tb 363: cfg.cipher = EVP_get_cipherbyname(pname);
1.4 jsing 364:
1.29 ! tb 365: if (!cfg.base64 && cfg.cipher == NULL && strcmp(pname, "enc") != 0) {
1.1 jsing 366: BIO_printf(bio_err, "%s is an unknown cipher\n", pname);
1.4 jsing 367: goto end;
368: }
369:
370: if (options_parse(argc, argv, enc_options, NULL, NULL) != 0) {
371: enc_usage();
372: goto end;
1.1 jsing 373: }
1.4 jsing 374:
1.27 tb 375: if (cfg.keyfile != NULL) {
1.4 jsing 376: static char buf[128];
377: FILE *infile;
378:
1.27 tb 379: infile = fopen(cfg.keyfile, "r");
1.4 jsing 380: if (infile == NULL) {
381: BIO_printf(bio_err, "unable to read key from '%s'\n",
1.27 tb 382: cfg.keyfile);
1.4 jsing 383: goto end;
1.1 jsing 384: }
1.4 jsing 385: buf[0] = '\0';
386: if (!fgets(buf, sizeof buf, infile)) {
387: BIO_printf(bio_err, "unable to read key from '%s'\n",
1.27 tb 388: cfg.keyfile);
1.4 jsing 389: fclose(infile);
390: goto end;
1.1 jsing 391: }
1.4 jsing 392: fclose(infile);
393: i = strlen(buf);
394: if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
395: buf[--i] = '\0';
396: if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
397: buf[--i] = '\0';
398: if (i < 1) {
399: BIO_printf(bio_err, "zero length password\n");
1.1 jsing 400: goto end;
401: }
1.27 tb 402: cfg.keystr = buf;
1.26 tb 403: }
404:
1.27 tb 405: if (cfg.cipher != NULL &&
406: (EVP_CIPHER_flags(cfg.cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0) {
1.26 tb 407: BIO_printf(bio_err, "enc does not support AEAD ciphers\n");
408: goto end;
409: }
410:
1.27 tb 411: if (cfg.cipher != NULL &&
412: EVP_CIPHER_mode(cfg.cipher) == EVP_CIPH_XTS_MODE) {
1.26 tb 413: BIO_printf(bio_err, "enc does not support XTS mode\n");
414: goto end;
1.1 jsing 415: }
416:
1.27 tb 417: if (cfg.md != NULL &&
418: (dgst = EVP_get_digestbyname(cfg.md)) == NULL) {
1.4 jsing 419: BIO_printf(bio_err,
420: "%s is an unsupported message digest type\n",
1.27 tb 421: cfg.md);
1.1 jsing 422: goto end;
423: }
424: if (dgst == NULL) {
1.15 beck 425: dgst = EVP_sha256();
1.1 jsing 426: }
1.4 jsing 427:
1.27 tb 428: if (cfg.bufsize != NULL) {
429: char *p = cfg.bufsize;
1.1 jsing 430: unsigned long n;
431:
1.4 jsing 432: /* XXX - provide an OPTION_ARG_DISKUNIT. */
433: for (n = 0; *p != '\0'; p++) {
434: i = *p;
1.1 jsing 435: if ((i <= '9') && (i >= '0'))
436: n = n * 10 + i - '0';
437: else if (i == 'k') {
438: n *= 1024;
1.4 jsing 439: p++;
1.1 jsing 440: break;
441: }
442: }
1.4 jsing 443: if (*p != '\0') {
1.1 jsing 444: BIO_printf(bio_err, "invalid 'bufsize' specified.\n");
445: goto end;
446: }
1.4 jsing 447: /* It must be large enough for a base64 encoded line. */
1.27 tb 448: if (cfg.base64 && n < 80)
1.1 jsing 449: n = 80;
450:
1.4 jsing 451: bsize = (int)n;
1.27 tb 452: if (cfg.verbose)
1.1 jsing 453: BIO_printf(bio_err, "bufsize=%d\n", bsize);
454: }
455: strbuf = malloc(SIZE);
456: buff = malloc(EVP_ENCODE_LENGTH(bsize));
457: if ((buff == NULL) || (strbuf == NULL)) {
458: BIO_printf(bio_err, "malloc failure %ld\n", (long) EVP_ENCODE_LENGTH(bsize));
459: goto end;
460: }
461: in = BIO_new(BIO_s_file());
462: out = BIO_new(BIO_s_file());
463: if ((in == NULL) || (out == NULL)) {
464: ERR_print_errors(bio_err);
465: goto end;
466: }
1.27 tb 467: if (cfg.debug) {
1.1 jsing 468: BIO_set_callback(in, BIO_debug_callback);
469: BIO_set_callback(out, BIO_debug_callback);
470: BIO_set_callback_arg(in, (char *) bio_err);
471: BIO_set_callback_arg(out, (char *) bio_err);
472: }
1.27 tb 473: if (cfg.inf == NULL) {
474: if (cfg.bufsize != NULL)
1.1 jsing 475: setvbuf(stdin, (char *) NULL, _IONBF, 0);
476: BIO_set_fp(in, stdin, BIO_NOCLOSE);
477: } else {
1.27 tb 478: if (BIO_read_filename(in, cfg.inf) <= 0) {
479: perror(cfg.inf);
1.1 jsing 480: goto end;
481: }
482: }
483:
1.27 tb 484: if (!cfg.keystr && cfg.passarg) {
485: if (!app_passwd(bio_err, cfg.passarg, NULL,
1.4 jsing 486: &pass, NULL)) {
1.1 jsing 487: BIO_printf(bio_err, "Error getting password\n");
488: goto end;
489: }
1.27 tb 490: cfg.keystr = pass;
1.1 jsing 491: }
1.27 tb 492: if (cfg.keystr == NULL && cfg.cipher != NULL &&
493: cfg.hkey == NULL) {
1.1 jsing 494: for (;;) {
495: char buf[200];
1.2 doug 496: int retval;
1.1 jsing 497:
1.4 jsing 498: retval = snprintf(buf, sizeof buf,
499: "enter %s %s password:",
1.27 tb 500: OBJ_nid2ln(EVP_CIPHER_nid(cfg.cipher)),
501: cfg.enc ? "encryption" : "decryption");
1.2 doug 502: if ((size_t)retval >= sizeof buf) {
1.4 jsing 503: BIO_printf(bio_err,
504: "Password prompt too long\n");
1.1 jsing 505: goto end;
506: }
507: strbuf[0] = '\0';
1.4 jsing 508: i = EVP_read_pw_string((char *)strbuf, SIZE, buf,
1.27 tb 509: cfg.enc);
1.1 jsing 510: if (i == 0) {
511: if (strbuf[0] == '\0') {
512: ret = 1;
513: goto end;
514: }
1.27 tb 515: cfg.keystr = strbuf;
1.1 jsing 516: break;
517: }
518: if (i < 0) {
519: BIO_printf(bio_err, "bad password read\n");
520: goto end;
521: }
522: }
523: }
1.27 tb 524: if (cfg.outf == NULL) {
1.1 jsing 525: BIO_set_fp(out, stdout, BIO_NOCLOSE);
1.27 tb 526: if (cfg.bufsize != NULL)
1.4 jsing 527: setvbuf(stdout, (char *)NULL, _IONBF, 0);
1.1 jsing 528: } else {
1.27 tb 529: if (BIO_write_filename(out, cfg.outf) <= 0) {
530: perror(cfg.outf);
1.1 jsing 531: goto end;
532: }
533: }
534:
535: rbio = in;
536: wbio = out;
537:
1.27 tb 538: if (cfg.base64) {
1.1 jsing 539: if ((b64 = BIO_new(BIO_f_base64())) == NULL)
540: goto end;
1.27 tb 541: if (cfg.debug) {
1.1 jsing 542: BIO_set_callback(b64, BIO_debug_callback);
543: BIO_set_callback_arg(b64, (char *) bio_err);
544: }
1.27 tb 545: if (cfg.olb64)
1.1 jsing 546: BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1.27 tb 547: if (cfg.enc)
1.1 jsing 548: wbio = BIO_push(b64, wbio);
549: else
550: rbio = BIO_push(b64, rbio);
551: }
1.27 tb 552: if (cfg.cipher != NULL) {
1.1 jsing 553: /*
1.4 jsing 554: * Note that keystr is NULL if a key was passed on the command
1.1 jsing 555: * line, so we get no salt in that case. Is this a bug?
556: */
1.27 tb 557: if (cfg.keystr != NULL) {
1.1 jsing 558: /*
559: * Salt handling: if encrypting generate a salt and
560: * write to output BIO. If decrypting read salt from
561: * input BIO.
562: */
563: unsigned char *sptr;
1.27 tb 564: if (cfg.nosalt)
1.1 jsing 565: sptr = NULL;
566: else {
1.27 tb 567: if (cfg.enc) {
568: if (cfg.hsalt) {
569: if (!set_hex(cfg.hsalt, salt, sizeof salt)) {
1.1 jsing 570: BIO_printf(bio_err,
571: "invalid hex salt value\n");
572: goto end;
573: }
1.3 jsing 574: } else
575: arc4random_buf(salt,
576: sizeof(salt));
1.1 jsing 577: /*
578: * If -P option then don't bother
579: * writing
580: */
1.27 tb 581: if ((cfg.printkey != 2)
1.1 jsing 582: && (BIO_write(wbio, magic,
583: sizeof magic - 1) != sizeof magic - 1
584: || BIO_write(wbio,
585: (char *) salt,
586: sizeof salt) != sizeof salt)) {
587: BIO_printf(bio_err, "error writing output file\n");
588: goto end;
589: }
590: } else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
591: || BIO_read(rbio,
592: (unsigned char *) salt,
593: sizeof salt) != sizeof salt) {
594: BIO_printf(bio_err, "error reading input file\n");
595: goto end;
596: } else if (memcmp(mbuf, magic, sizeof magic - 1)) {
597: BIO_printf(bio_err, "bad magic number\n");
598: goto end;
599: }
600: sptr = salt;
601: }
1.27 tb 602: if (cfg.pbkdf2 == 1 || cfg.iter > 0) {
1.15 beck 603: /*
604: * derive key and default iv
605: * concatenated into a temporary buffer
606: */
607: unsigned char tmpkeyiv[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH];
1.27 tb 608: int iklen = EVP_CIPHER_key_length(cfg.cipher);
609: int ivlen = EVP_CIPHER_iv_length(cfg.cipher);
1.15 beck 610: /* not needed if HASH_UPDATE() is fixed : */
611: int islen = (sptr != NULL ? sizeof(salt) : 0);
612:
1.27 tb 613: if (cfg.iter == 0)
614: cfg.iter = 10000;
1.15 beck 615:
1.27 tb 616: if (!PKCS5_PBKDF2_HMAC(cfg.keystr,
617: strlen(cfg.keystr), sptr, islen,
618: cfg.iter, dgst, iklen+ivlen, tmpkeyiv)) {
1.15 beck 619: BIO_printf(bio_err, "PKCS5_PBKDF2_HMAC failed\n");
620: goto end;
621: }
622: /* split and move data back to global buffer */
623: memcpy(key, tmpkeyiv, iklen);
1.22 bcook 624: memcpy(iv, tmpkeyiv + iklen, ivlen);
625: explicit_bzero(tmpkeyiv, sizeof tmpkeyiv);
1.15 beck 626: } else {
1.27 tb 627: EVP_BytesToKey(cfg.cipher, dgst, sptr,
628: (unsigned char *)cfg.keystr,
629: strlen(cfg.keystr), 1, key, iv);
1.15 beck 630: }
1.1 jsing 631:
632: /*
633: * zero the complete buffer or the string passed from
634: * the command line bug picked up by Larry J. Hughes
635: * Jr. <hughes@indiana.edu>
636: */
1.27 tb 637: if (cfg.keystr == strbuf)
638: explicit_bzero(cfg.keystr, SIZE);
1.1 jsing 639: else
1.27 tb 640: explicit_bzero(cfg.keystr,
641: strlen(cfg.keystr));
1.1 jsing 642: }
1.27 tb 643: if (cfg.hiv != NULL &&
644: !set_hex(cfg.hiv, iv, sizeof iv)) {
1.1 jsing 645: BIO_printf(bio_err, "invalid hex iv value\n");
646: goto end;
647: }
1.27 tb 648: if (cfg.hiv == NULL && cfg.keystr == NULL &&
649: EVP_CIPHER_iv_length(cfg.cipher) != 0) {
1.1 jsing 650: /*
651: * No IV was explicitly set and no IV was generated
652: * during EVP_BytesToKey. Hence the IV is undefined,
653: * making correct decryption impossible.
654: */
655: BIO_printf(bio_err, "iv undefined\n");
656: goto end;
657: }
1.27 tb 658: if (cfg.hkey != NULL &&
659: !set_hex(cfg.hkey, key, sizeof key)) {
1.1 jsing 660: BIO_printf(bio_err, "invalid hex key value\n");
661: goto end;
662: }
663: if ((benc = BIO_new(BIO_f_cipher())) == NULL)
664: goto end;
665:
666: /*
667: * Since we may be changing parameters work on the encryption
668: * context rather than calling BIO_set_cipher().
669: */
670:
671: BIO_get_cipher_ctx(benc, &ctx);
672:
1.27 tb 673: if (!EVP_CipherInit_ex(ctx, cfg.cipher, NULL, NULL,
674: NULL, cfg.enc)) {
1.1 jsing 675: BIO_printf(bio_err, "Error setting cipher %s\n",
1.27 tb 676: EVP_CIPHER_name(cfg.cipher));
1.1 jsing 677: ERR_print_errors(bio_err);
678: goto end;
679: }
1.27 tb 680: if (cfg.nopad)
1.1 jsing 681: EVP_CIPHER_CTX_set_padding(ctx, 0);
682:
1.4 jsing 683: if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv,
1.27 tb 684: cfg.enc)) {
1.1 jsing 685: BIO_printf(bio_err, "Error setting cipher %s\n",
1.27 tb 686: EVP_CIPHER_name(cfg.cipher));
1.1 jsing 687: ERR_print_errors(bio_err);
688: goto end;
689: }
1.27 tb 690: if (cfg.debug) {
1.1 jsing 691: BIO_set_callback(benc, BIO_debug_callback);
692: BIO_set_callback_arg(benc, (char *) bio_err);
693: }
1.27 tb 694: if (cfg.printkey) {
1.24 tb 695: int key_len, iv_len;
696:
1.27 tb 697: if (!cfg.nosalt) {
1.1 jsing 698: printf("salt=");
699: for (i = 0; i < (int) sizeof(salt); i++)
700: printf("%02X", salt[i]);
701: printf("\n");
702: }
1.27 tb 703: key_len = EVP_CIPHER_key_length(cfg.cipher);
1.24 tb 704: if (key_len > 0) {
1.1 jsing 705: printf("key=");
1.24 tb 706: for (i = 0; i < key_len; i++)
1.1 jsing 707: printf("%02X", key[i]);
708: printf("\n");
709: }
1.27 tb 710: iv_len = EVP_CIPHER_iv_length(cfg.cipher);
1.24 tb 711: if (iv_len > 0) {
1.1 jsing 712: printf("iv =");
1.24 tb 713: for (i = 0; i < iv_len; i++)
1.1 jsing 714: printf("%02X", iv[i]);
715: printf("\n");
716: }
1.27 tb 717: if (cfg.printkey == 2) {
1.1 jsing 718: ret = 0;
719: goto end;
720: }
721: }
722: }
723: /* Only encrypt/decrypt as we write the file */
724: if (benc != NULL)
725: wbio = BIO_push(benc, wbio);
726:
727: for (;;) {
728: inl = BIO_read(rbio, (char *) buff, bsize);
729: if (inl <= 0)
730: break;
731: if (BIO_write(wbio, (char *) buff, inl) != inl) {
732: BIO_printf(bio_err, "error writing output file\n");
733: goto end;
734: }
735: }
736: if (!BIO_flush(wbio)) {
737: BIO_printf(bio_err, "bad decrypt\n");
738: goto end;
739: }
740: ret = 0;
1.27 tb 741: if (cfg.verbose) {
1.1 jsing 742: BIO_printf(bio_err, "bytes read :%8ld\n", BIO_number_read(in));
743: BIO_printf(bio_err, "bytes written:%8ld\n", BIO_number_written(out));
744: }
1.14 jsing 745: end:
1.1 jsing 746: ERR_print_errors(bio_err);
747: free(strbuf);
748: free(buff);
749: BIO_free(in);
1.13 jsing 750: BIO_free_all(out);
1.1 jsing 751: BIO_free(benc);
752: BIO_free(b64);
753: free(pass);
754:
755: return (ret);
756: }
757:
758: int
759: set_hex(char *in, unsigned char *out, int size)
760: {
761: int i, n;
762: unsigned char j;
763:
764: n = strlen(in);
765: if (n > (size * 2)) {
766: BIO_printf(bio_err, "hex string is too long\n");
767: return (0);
768: }
769: memset(out, 0, size);
770: for (i = 0; i < n; i++) {
771: j = (unsigned char) *in;
772: *(in++) = '\0';
773: if (j == 0)
774: break;
775: if ((j >= '0') && (j <= '9'))
776: j -= '0';
777: else if ((j >= 'A') && (j <= 'F'))
778: j = j - 'A' + 10;
779: else if ((j >= 'a') && (j <= 'f'))
780: j = j - 'a' + 10;
781: else {
782: BIO_printf(bio_err, "non-hex digit\n");
783: return (0);
784: }
785: if (i & 1)
786: out[i / 2] |= j;
787: else
788: out[i / 2] = (j << 4);
789: }
790: return (1);
791: }