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1.20 ! jsing 1: /* $OpenBSD: enc.c,v 1.19 2019/04/01 16:05:14 jsing 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: #ifdef ZLIB
84: int do_zlib;
85: #endif
86: int enc;
87: char *hiv;
88: char *hkey;
89: char *hsalt;
90: char *inf;
1.20 ! jsing 91: int iter;
1.4 jsing 92: char *keyfile;
93: char *keystr;
94: char *md;
95: int nopad;
96: int nosalt;
97: int olb64;
98: char *outf;
99: char *passarg;
1.20 ! jsing 100: int pbkdf2;
1.4 jsing 101: int printkey;
102: int verbose;
103: } enc_config;
104:
105: static int
106: enc_opt_cipher(int argc, char **argv, int *argsused)
107: {
108: char *name = argv[0];
109:
110: if (*name++ != '-')
111: return (1);
112:
113: if (strcmp(name, "none") == 0) {
114: enc_config.cipher = NULL;
115: *argsused = 1;
116: return (0);
117: }
118:
119: if ((enc_config.cipher = EVP_get_cipherbyname(name)) != NULL) {
120: *argsused = 1;
121: return (0);
122: }
123:
124: return (1);
125: }
126:
127: static struct option enc_options[] = {
128: {
129: .name = "A",
130: .desc = "Process base64 data on one line (requires -a)",
131: .type = OPTION_FLAG,
132: .opt.flag = &enc_config.olb64,
133: },
134: {
135: .name = "a",
136: .desc = "Perform base64 encoding/decoding (alias -base64)",
137: .type = OPTION_FLAG,
138: .opt.flag = &enc_config.base64,
139: },
140: {
141: .name = "base64",
142: .type = OPTION_FLAG,
143: .opt.flag = &enc_config.base64,
144: },
145: {
146: .name = "bufsize",
147: .argname = "size",
148: .desc = "Specify the buffer size to use for I/O",
149: .type = OPTION_ARG,
150: .opt.arg = &enc_config.bufsize,
151: },
152: {
153: .name = "d",
154: .desc = "Decrypt the input data",
155: .type = OPTION_VALUE,
156: .opt.value = &enc_config.enc,
157: .value = 0,
158: },
159: {
160: .name = "debug",
161: .desc = "Print debugging information",
162: .type = OPTION_FLAG,
163: .opt.flag = &enc_config.debug,
164: },
165: {
166: .name = "e",
167: .desc = "Encrypt the input data (default)",
168: .type = OPTION_VALUE,
169: .opt.value = &enc_config.enc,
170: .value = 1,
171: },
172: {
173: .name = "in",
174: .argname = "file",
175: .desc = "Input file to read from (default stdin)",
176: .type = OPTION_ARG,
177: .opt.arg = &enc_config.inf,
178: },
179: {
1.16 naddy 180: .name = "iter",
181: .argname = "iterations",
182: .desc = "Specify iteration count and force use of PBKDF2",
1.19 jsing 183: .type = OPTION_ARG_INT,
1.16 naddy 184: .opt.value = &enc_config.iter,
185: },
186: {
1.4 jsing 187: .name = "iv",
188: .argname = "IV",
1.11 jmc 189: .desc = "IV to use, specified as a hexadecimal string",
1.4 jsing 190: .type = OPTION_ARG,
191: .opt.arg = &enc_config.hiv,
192: },
193: {
194: .name = "K",
195: .argname = "key",
1.11 jmc 196: .desc = "Key to use, specified as a hexadecimal string",
1.4 jsing 197: .type = OPTION_ARG,
198: .opt.arg = &enc_config.hkey,
199: },
200: {
201: .name = "k", /* Superseded by -pass. */
202: .type = OPTION_ARG,
203: .opt.arg = &enc_config.keystr,
204: },
205: {
206: .name = "kfile", /* Superseded by -pass. */
207: .type = OPTION_ARG,
208: .opt.arg = &enc_config.keyfile,
209: },
210: {
211: .name = "md",
212: .argname = "digest",
213: .desc = "Digest to use to create a key from the passphrase",
214: .type = OPTION_ARG,
215: .opt.arg = &enc_config.md,
216: },
217: {
218: .name = "none",
219: .desc = "Use NULL cipher (no encryption or decryption)",
220: .type = OPTION_ARGV_FUNC,
221: .opt.argvfunc = enc_opt_cipher,
222: },
223: {
224: .name = "nopad",
225: .desc = "Disable standard block padding",
226: .type = OPTION_FLAG,
227: .opt.flag = &enc_config.nopad,
228: },
229: {
230: .name = "nosalt",
231: .type = OPTION_VALUE,
232: .opt.value = &enc_config.nosalt,
233: .value = 1,
234: },
235: {
236: .name = "out",
237: .argname = "file",
238: .desc = "Output file to write to (default stdout)",
239: .type = OPTION_ARG,
240: .opt.arg = &enc_config.outf,
241: },
242: {
243: .name = "P",
244: .desc = "Print out the salt, key and IV used, then exit\n"
245: " (no encryption or decryption is performed)",
246: .type = OPTION_VALUE,
247: .opt.value = &enc_config.printkey,
248: .value = 2,
249: },
250: {
251: .name = "p",
252: .desc = "Print out the salt, key and IV used",
253: .type = OPTION_VALUE,
254: .opt.value = &enc_config.printkey,
255: .value = 1,
256: },
257: {
258: .name = "pass",
259: .argname = "source",
260: .desc = "Password source",
261: .type = OPTION_ARG,
262: .opt.arg = &enc_config.passarg,
263: },
264: {
1.16 naddy 265: .name = "pbkdf2",
266: .desc = "Use the pbkdf2 key derivation function",
267: .type = OPTION_FLAG,
268: .opt.flag = &enc_config.pbkdf2,
269: },
270: {
1.4 jsing 271: .name = "S",
272: .argname = "salt",
1.11 jmc 273: .desc = "Salt to use, specified as a hexadecimal string",
1.4 jsing 274: .type = OPTION_ARG,
275: .opt.arg = &enc_config.hsalt,
276: },
277: {
278: .name = "salt",
279: .desc = "Use a salt in the key derivation routines (default)",
280: .type = OPTION_VALUE,
281: .opt.value = &enc_config.nosalt,
282: .value = 0,
283: },
284: {
285: .name = "v",
286: .desc = "Verbose",
287: .type = OPTION_FLAG,
288: .opt.flag = &enc_config.verbose,
289: },
290: #ifdef ZLIB
291: {
292: .name = "z",
293: .desc = "Perform zlib compression/decompression",
294: .type = OPTION_FLAG,
295: .opt.flag = &enc_config.do_zlib,
296: },
297: #endif
298: {
299: .name = NULL,
300: .type = OPTION_ARGV_FUNC,
301: .opt.argvfunc = enc_opt_cipher,
302: },
303: { NULL },
304: };
1.1 jsing 305:
306: static void
1.4 jsing 307: enc_usage(void)
308: {
1.18 inoguchi 309: int n = 0;
310:
1.4 jsing 311: fprintf(stderr, "usage: enc -ciphername [-AadePp] [-base64] "
312: "[-bufsize number] [-debug]\n"
1.16 naddy 313: " [-in file] [-iter iterations] [-iv IV] [-K key] "
314: "[-k password]\n"
1.4 jsing 315: " [-kfile file] [-md digest] [-none] [-nopad] [-nosalt]\n"
1.16 naddy 316: " [-out file] [-pass source] [-pbkdf2] [-S salt] [-salt]\n\n");
1.4 jsing 317: options_usage(enc_options);
318: fprintf(stderr, "\n");
319:
320: fprintf(stderr, "Valid ciphername values:\n\n");
1.18 inoguchi 321: OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_cipher, &n);
1.4 jsing 322: fprintf(stderr, "\n");
1.1 jsing 323: }
324:
325: int
326: enc_main(int argc, char **argv)
327: {
328: static const char magic[] = "Salted__";
329: char mbuf[sizeof magic - 1];
1.4 jsing 330: char *strbuf = NULL, *pass = NULL;
331: unsigned char *buff = NULL;
332: int bsize = BSIZE;
1.1 jsing 333: int ret = 1, inl;
334: unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
335: unsigned char salt[PKCS5_SALT_LEN];
336: #ifdef ZLIB
337: BIO *bzl = NULL;
338: #endif
339: EVP_CIPHER_CTX *ctx = NULL;
1.4 jsing 340: const EVP_MD *dgst = NULL;
341: BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL;
342: BIO *rbio = NULL, *wbio = NULL;
1.1 jsing 343: #define PROG_NAME_SIZE 39
344: char pname[PROG_NAME_SIZE + 1];
1.4 jsing 345: int i;
1.8 doug 346:
347: if (single_execution) {
1.12 deraadt 348: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
1.8 doug 349: perror("pledge");
1.10 doug 350: exit(1);
351: }
1.8 doug 352: }
1.4 jsing 353:
354: memset(&enc_config, 0, sizeof(enc_config));
355: enc_config.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)
1.4 jsing 361: enc_config.base64 = 1;
362:
1.1 jsing 363: #ifdef ZLIB
364: if (strcmp(pname, "zlib") == 0)
1.4 jsing 365: enc_config.do_zlib = 1;
1.1 jsing 366: #endif
367:
1.4 jsing 368: enc_config.cipher = EVP_get_cipherbyname(pname);
369:
1.1 jsing 370: #ifdef ZLIB
1.4 jsing 371: if (!enc_config.do_zlib && !enc_config.base64 &&
372: enc_config.cipher == NULL && strcmp(pname, "enc") != 0)
1.1 jsing 373: #else
1.4 jsing 374: if (!enc_config.base64 && enc_config.cipher == NULL &&
375: strcmp(pname, "enc") != 0)
1.1 jsing 376: #endif
377: {
378: BIO_printf(bio_err, "%s is an unknown cipher\n", pname);
1.4 jsing 379: goto end;
380: }
381:
382: if (options_parse(argc, argv, enc_options, NULL, NULL) != 0) {
383: enc_usage();
384: goto end;
1.1 jsing 385: }
1.4 jsing 386:
387: if (enc_config.keyfile != NULL) {
388: static char buf[128];
389: FILE *infile;
390:
391: infile = fopen(enc_config.keyfile, "r");
392: if (infile == NULL) {
393: BIO_printf(bio_err, "unable to read key from '%s'\n",
394: enc_config.keyfile);
395: goto end;
1.1 jsing 396: }
1.4 jsing 397: buf[0] = '\0';
398: if (!fgets(buf, sizeof buf, infile)) {
399: BIO_printf(bio_err, "unable to read key from '%s'\n",
400: enc_config.keyfile);
401: fclose(infile);
402: goto end;
1.1 jsing 403: }
1.4 jsing 404: fclose(infile);
405: i = strlen(buf);
406: if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
407: buf[--i] = '\0';
408: if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
409: buf[--i] = '\0';
410: if (i < 1) {
411: BIO_printf(bio_err, "zero length password\n");
1.1 jsing 412: goto end;
413: }
1.4 jsing 414: enc_config.keystr = buf;
1.1 jsing 415: }
416:
1.4 jsing 417: if (enc_config.md != NULL &&
418: (dgst = EVP_get_digestbyname(enc_config.md)) == NULL) {
419: BIO_printf(bio_err,
420: "%s is an unsupported message digest type\n",
421: enc_config.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:
428: if (enc_config.bufsize != NULL) {
429: char *p = enc_config.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. */
448: if (enc_config.base64 && n < 80)
1.1 jsing 449: n = 80;
450:
1.4 jsing 451: bsize = (int)n;
452: if (enc_config.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: }
1.4 jsing 467: if (enc_config.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: }
1.4 jsing 473: if (enc_config.inf == NULL) {
474: if (enc_config.bufsize != NULL)
1.1 jsing 475: setvbuf(stdin, (char *) NULL, _IONBF, 0);
476: BIO_set_fp(in, stdin, BIO_NOCLOSE);
477: } else {
1.4 jsing 478: if (BIO_read_filename(in, enc_config.inf) <= 0) {
479: perror(enc_config.inf);
1.1 jsing 480: goto end;
481: }
482: }
483:
1.4 jsing 484: if (!enc_config.keystr && enc_config.passarg) {
485: if (!app_passwd(bio_err, enc_config.passarg, NULL,
486: &pass, NULL)) {
1.1 jsing 487: BIO_printf(bio_err, "Error getting password\n");
488: goto end;
489: }
1.4 jsing 490: enc_config.keystr = pass;
1.1 jsing 491: }
1.4 jsing 492: if (enc_config.keystr == NULL && enc_config.cipher != NULL &&
493: enc_config.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:",
500: OBJ_nid2ln(EVP_CIPHER_nid(enc_config.cipher)),
501: enc_config.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,
509: enc_config.enc);
1.1 jsing 510: if (i == 0) {
511: if (strbuf[0] == '\0') {
512: ret = 1;
513: goto end;
514: }
1.4 jsing 515: enc_config.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: }
1.4 jsing 524: if (enc_config.outf == NULL) {
1.1 jsing 525: BIO_set_fp(out, stdout, BIO_NOCLOSE);
1.4 jsing 526: if (enc_config.bufsize != NULL)
527: setvbuf(stdout, (char *)NULL, _IONBF, 0);
1.1 jsing 528: } else {
1.4 jsing 529: if (BIO_write_filename(out, enc_config.outf) <= 0) {
530: perror(enc_config.outf);
1.1 jsing 531: goto end;
532: }
533: }
534:
535: rbio = in;
536: wbio = out;
537:
538: #ifdef ZLIB
539: if (do_zlib) {
540: if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
541: goto end;
542: if (enc)
543: wbio = BIO_push(bzl, wbio);
544: else
545: rbio = BIO_push(bzl, rbio);
546: }
547: #endif
548:
1.4 jsing 549: if (enc_config.base64) {
1.1 jsing 550: if ((b64 = BIO_new(BIO_f_base64())) == NULL)
551: goto end;
1.4 jsing 552: if (enc_config.debug) {
1.1 jsing 553: BIO_set_callback(b64, BIO_debug_callback);
554: BIO_set_callback_arg(b64, (char *) bio_err);
555: }
1.4 jsing 556: if (enc_config.olb64)
1.1 jsing 557: BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1.4 jsing 558: if (enc_config.enc)
1.1 jsing 559: wbio = BIO_push(b64, wbio);
560: else
561: rbio = BIO_push(b64, rbio);
562: }
1.4 jsing 563: if (enc_config.cipher != NULL) {
1.1 jsing 564: /*
1.4 jsing 565: * Note that keystr is NULL if a key was passed on the command
1.1 jsing 566: * line, so we get no salt in that case. Is this a bug?
567: */
1.4 jsing 568: if (enc_config.keystr != NULL) {
1.1 jsing 569: /*
570: * Salt handling: if encrypting generate a salt and
571: * write to output BIO. If decrypting read salt from
572: * input BIO.
573: */
574: unsigned char *sptr;
1.4 jsing 575: if (enc_config.nosalt)
1.1 jsing 576: sptr = NULL;
577: else {
1.4 jsing 578: if (enc_config.enc) {
579: if (enc_config.hsalt) {
580: if (!set_hex(enc_config.hsalt, salt, sizeof salt)) {
1.1 jsing 581: BIO_printf(bio_err,
582: "invalid hex salt value\n");
583: goto end;
584: }
1.3 jsing 585: } else
586: arc4random_buf(salt,
587: sizeof(salt));
1.1 jsing 588: /*
589: * If -P option then don't bother
590: * writing
591: */
1.4 jsing 592: if ((enc_config.printkey != 2)
1.1 jsing 593: && (BIO_write(wbio, magic,
594: sizeof magic - 1) != sizeof magic - 1
595: || BIO_write(wbio,
596: (char *) salt,
597: sizeof salt) != sizeof salt)) {
598: BIO_printf(bio_err, "error writing output file\n");
599: goto end;
600: }
601: } else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
602: || BIO_read(rbio,
603: (unsigned char *) salt,
604: sizeof salt) != sizeof salt) {
605: BIO_printf(bio_err, "error reading input file\n");
606: goto end;
607: } else if (memcmp(mbuf, magic, sizeof magic - 1)) {
608: BIO_printf(bio_err, "bad magic number\n");
609: goto end;
610: }
611: sptr = salt;
612: }
1.15 beck 613: if (enc_config.pbkdf2 == 1 || enc_config.iter > 0) {
614: /*
615: * derive key and default iv
616: * concatenated into a temporary buffer
617: */
618: unsigned char tmpkeyiv[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH];
619: int iklen = EVP_CIPHER_key_length(enc_config.cipher);
620: int ivlen = EVP_CIPHER_iv_length(enc_config.cipher);
621: /* not needed if HASH_UPDATE() is fixed : */
622: int islen = (sptr != NULL ? sizeof(salt) : 0);
623:
624: if (enc_config.iter == 0)
625: enc_config.iter = 10000;
626:
627: if (!PKCS5_PBKDF2_HMAC(enc_config.keystr,
628: strlen(enc_config.keystr), sptr, islen,
629: enc_config.iter, dgst, iklen+ivlen, tmpkeyiv)) {
630: BIO_printf(bio_err, "PKCS5_PBKDF2_HMAC failed\n");
631: goto end;
632: }
633: /* split and move data back to global buffer */
634: memcpy(key, tmpkeyiv, iklen);
635: memcpy(iv, tmpkeyiv+iklen, ivlen);
636: } else {
637: EVP_BytesToKey(enc_config.cipher, dgst, sptr,
638: (unsigned char *)enc_config.keystr,
639: strlen(enc_config.keystr), 1, key, iv);
640: }
1.1 jsing 641:
642: /*
643: * zero the complete buffer or the string passed from
644: * the command line bug picked up by Larry J. Hughes
645: * Jr. <hughes@indiana.edu>
646: */
1.4 jsing 647: if (enc_config.keystr == strbuf)
1.6 jsing 648: explicit_bzero(enc_config.keystr, SIZE);
1.1 jsing 649: else
1.6 jsing 650: explicit_bzero(enc_config.keystr,
1.4 jsing 651: strlen(enc_config.keystr));
1.1 jsing 652: }
1.4 jsing 653: if (enc_config.hiv != NULL &&
654: !set_hex(enc_config.hiv, iv, sizeof iv)) {
1.1 jsing 655: BIO_printf(bio_err, "invalid hex iv value\n");
656: goto end;
657: }
1.4 jsing 658: if (enc_config.hiv == NULL && enc_config.keystr == NULL &&
659: EVP_CIPHER_iv_length(enc_config.cipher) != 0) {
1.1 jsing 660: /*
661: * No IV was explicitly set and no IV was generated
662: * during EVP_BytesToKey. Hence the IV is undefined,
663: * making correct decryption impossible.
664: */
665: BIO_printf(bio_err, "iv undefined\n");
666: goto end;
667: }
1.4 jsing 668: if (enc_config.hkey != NULL &&
669: !set_hex(enc_config.hkey, key, sizeof key)) {
1.1 jsing 670: BIO_printf(bio_err, "invalid hex key value\n");
671: goto end;
672: }
673: if ((benc = BIO_new(BIO_f_cipher())) == NULL)
674: goto end;
675:
676: /*
677: * Since we may be changing parameters work on the encryption
678: * context rather than calling BIO_set_cipher().
679: */
680:
681: BIO_get_cipher_ctx(benc, &ctx);
682:
1.4 jsing 683: if (!EVP_CipherInit_ex(ctx, enc_config.cipher, NULL, NULL,
684: NULL, enc_config.enc)) {
1.1 jsing 685: BIO_printf(bio_err, "Error setting cipher %s\n",
1.4 jsing 686: EVP_CIPHER_name(enc_config.cipher));
1.1 jsing 687: ERR_print_errors(bio_err);
688: goto end;
689: }
1.4 jsing 690: if (enc_config.nopad)
1.1 jsing 691: EVP_CIPHER_CTX_set_padding(ctx, 0);
692:
1.4 jsing 693: if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv,
694: enc_config.enc)) {
1.1 jsing 695: BIO_printf(bio_err, "Error setting cipher %s\n",
1.4 jsing 696: EVP_CIPHER_name(enc_config.cipher));
1.1 jsing 697: ERR_print_errors(bio_err);
698: goto end;
699: }
1.4 jsing 700: if (enc_config.debug) {
1.1 jsing 701: BIO_set_callback(benc, BIO_debug_callback);
702: BIO_set_callback_arg(benc, (char *) bio_err);
703: }
1.4 jsing 704: if (enc_config.printkey) {
705: if (!enc_config.nosalt) {
1.1 jsing 706: printf("salt=");
707: for (i = 0; i < (int) sizeof(salt); i++)
708: printf("%02X", salt[i]);
709: printf("\n");
710: }
1.4 jsing 711: if (enc_config.cipher->key_len > 0) {
1.1 jsing 712: printf("key=");
1.4 jsing 713: for (i = 0; i < enc_config.cipher->key_len; i++)
1.1 jsing 714: printf("%02X", key[i]);
715: printf("\n");
716: }
1.4 jsing 717: if (enc_config.cipher->iv_len > 0) {
1.1 jsing 718: printf("iv =");
1.4 jsing 719: for (i = 0; i < enc_config.cipher->iv_len; i++)
1.1 jsing 720: printf("%02X", iv[i]);
721: printf("\n");
722: }
1.4 jsing 723: if (enc_config.printkey == 2) {
1.1 jsing 724: ret = 0;
725: goto end;
726: }
727: }
728: }
729: /* Only encrypt/decrypt as we write the file */
730: if (benc != NULL)
731: wbio = BIO_push(benc, wbio);
732:
733: for (;;) {
734: inl = BIO_read(rbio, (char *) buff, bsize);
735: if (inl <= 0)
736: break;
737: if (BIO_write(wbio, (char *) buff, inl) != inl) {
738: BIO_printf(bio_err, "error writing output file\n");
739: goto end;
740: }
741: }
742: if (!BIO_flush(wbio)) {
743: BIO_printf(bio_err, "bad decrypt\n");
744: goto end;
745: }
746: ret = 0;
1.4 jsing 747: if (enc_config.verbose) {
1.1 jsing 748: BIO_printf(bio_err, "bytes read :%8ld\n", BIO_number_read(in));
749: BIO_printf(bio_err, "bytes written:%8ld\n", BIO_number_written(out));
750: }
1.14 jsing 751: end:
1.1 jsing 752: ERR_print_errors(bio_err);
753: free(strbuf);
754: free(buff);
755: BIO_free(in);
1.13 jsing 756: BIO_free_all(out);
1.1 jsing 757: BIO_free(benc);
758: BIO_free(b64);
759: #ifdef ZLIB
760: BIO_free(bzl);
761: #endif
762: free(pass);
763:
764: return (ret);
765: }
766:
767: int
768: set_hex(char *in, unsigned char *out, int size)
769: {
770: int i, n;
771: unsigned char j;
772:
773: n = strlen(in);
774: if (n > (size * 2)) {
775: BIO_printf(bio_err, "hex string is too long\n");
776: return (0);
777: }
778: memset(out, 0, size);
779: for (i = 0; i < n; i++) {
780: j = (unsigned char) *in;
781: *(in++) = '\0';
782: if (j == 0)
783: break;
784: if ((j >= '0') && (j <= '9'))
785: j -= '0';
786: else if ((j >= 'A') && (j <= 'F'))
787: j = j - 'A' + 10;
788: else if ((j >= 'a') && (j <= 'f'))
789: j = j - 'a' + 10;
790: else {
791: BIO_printf(bio_err, "non-hex digit\n");
792: return (0);
793: }
794: if (i & 1)
795: out[i / 2] |= j;
796: else
797: out[i / 2] = (j << 4);
798: }
799: return (1);
800: }