1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
62 #include <openssl/bio.h>
63 #include <openssl/err.h>
64 #include <openssl/evp.h>
65 #include <openssl/objects.h>
66 #include <openssl/x509.h>
67 #include <openssl/rand.h>
68 #include <openssl/pem.h>
69 #ifndef OPENSSL_NO_COMP
70 # include <openssl/comp.h>
77 #define BSIZE (8*1024)
79 static int set_hex(char *in, unsigned char *out, int size);
80 static void show_ciphers(const OBJ_NAME *name, void *bio_);
82 typedef enum OPTION_choice {
83 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
84 OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
85 OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
86 OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
87 OPT_UPPER_S, OPT_IV, OPT_MD, OPT_CIPHER
90 OPTIONS enc_options[] = {
91 {"help", OPT_HELP, '-', "Display this summary"},
92 {"in", OPT_IN, '<', "Input file"},
93 {"out", OPT_OUT, '>', "Output file"},
94 {"pass", OPT_PASS, 's', "Passphrase source"},
95 {"e", OPT_E, '-', "Encrypt"},
96 {"d", OPT_D, '-', "Decrypt"},
97 {"p", OPT_P, '-', "Print the iv/key"},
98 {"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
100 {"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
101 {"salt", OPT_SALT, '-'},
102 {"nosalt", OPT_NOSALT, '-'},
103 {"debug", OPT_DEBUG, '-'},
104 {"A", OPT_UPPER_A, '-'},
105 {"a", OPT_A, '-', "base64 encode/decode, depending on encryption flag"},
106 {"base64", OPT_A, '-', "Base64 output as a single line"},
107 {"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
108 {"k", OPT_K, 's', "Passphrase"},
109 {"kfile", OPT_KFILE, '<', "Fead passphrase from file"},
110 {"K", OPT_UPPER_K, 's', "Raw key, in hex"},
111 {"S", OPT_UPPER_S, 's', "Salt, in hex"},
112 {"iv", OPT_IV, 's', "IV in hex"},
113 {"md", OPT_MD, 's', "Use specified digest to create key from passphrase"},
114 {"none", OPT_NONE, '-', "Don't encrypt"},
115 {"", OPT_CIPHER, '-', "Any supported cipher"},
117 {"z", OPT_Z, '-', "Use zlib as the 'encryption'"},
119 #ifndef OPENSSL_NO_ENGINE
120 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
125 int enc_main(int argc, char **argv)
127 static char buf[128];
128 static const char magic[] = "Salted__";
129 BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
131 EVP_CIPHER_CTX *ctx = NULL;
132 const EVP_CIPHER *cipher = NULL, *c;
133 const EVP_MD *dgst = NULL;
134 char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
135 char *infile = NULL, *outfile = NULL, *prog;
136 char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
137 char mbuf[sizeof magic - 1];
139 int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
140 int enc = 1, printkey = 0, i, k;
141 int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
142 int ret = 1, inl, nopad = 0;
143 unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
144 unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
151 /* first check the program name */
152 prog = opt_progname(argv[0]);
153 if (strcmp(prog, "base64") == 0)
156 else if (strcmp(prog, "zlib") == 0)
160 cipher = EVP_get_cipherbyname(prog);
161 if (cipher == NULL && strcmp(prog, "enc") != 0) {
162 BIO_printf(bio_err, "%s is not a known cipher\n", prog);
167 prog = opt_init(argc, argv, enc_options);
168 while ((o = opt_next()) != OPT_EOF) {
173 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
176 opt_help(enc_options);
178 BIO_printf(bio_err, "Cipher Types\n");
179 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
180 show_ciphers, bio_err);
181 BIO_printf(bio_err, "\n");
196 (void)setup_engine(opt_arg(), 0);
235 i = (int)strlen(p) - 1;
236 k = i >= 1 && p[i] == 'k';
239 if (!opt_ulong(opt_arg(), &n))
249 in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
252 i = BIO_gets(in, buf, sizeof buf);
257 "%s Can't read key from %s\n", prog, opt_arg());
260 while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
263 BIO_printf(bio_err, "%s: zero length password\n", prog);
278 if (!opt_md(opt_arg(), &dgst))
282 if (!opt_cipher(opt_unknown(), &c))
291 argc = opt_num_rest();
294 if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
295 BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);
299 if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) {
300 BIO_printf(bio_err, "%s XTS ciphers not supported\n", prog);
307 /* It must be large enough for a base64 encoded line */
308 if (base64 && bsize < 80)
311 BIO_printf(bio_err, "bufsize=%d\n", bsize);
315 outformat = FORMAT_BASE64;
317 informat = FORMAT_BASE64;
320 strbuf = app_malloc(SIZE, "strbuf");
321 buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
324 BIO_set_callback(in, BIO_debug_callback);
325 BIO_set_callback(out, BIO_debug_callback);
326 BIO_set_callback_arg(in, (char *)bio_err);
327 BIO_set_callback_arg(out, (char *)bio_err);
330 if (infile == NULL) {
332 in = dup_bio_in(informat);
334 in = bio_open_default(infile, 'r', informat);
338 if (!str && passarg) {
339 if (!app_passwd(passarg, NULL, &pass, NULL)) {
340 BIO_printf(bio_err, "Error getting password\n");
346 if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
350 BIO_snprintf(prompt, sizeof prompt, "enter %s %s password:",
351 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
352 (enc) ? "encryption" : "decryption");
354 i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc);
356 if (strbuf[0] == '\0') {
364 BIO_printf(bio_err, "bad password read\n");
370 out = bio_open_default(outfile, 'w', outformat);
379 if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
382 wbio = BIO_push(bzl, wbio);
384 rbio = BIO_push(bzl, rbio);
389 if ((b64 = BIO_new(BIO_f_base64())) == NULL)
392 BIO_set_callback(b64, BIO_debug_callback);
393 BIO_set_callback_arg(b64, (char *)bio_err);
396 BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
398 wbio = BIO_push(b64, wbio);
400 rbio = BIO_push(b64, rbio);
403 if (cipher != NULL) {
405 * Note that str is NULL if a key was passed on the command line, so
406 * we get no salt in that case. Is this a bug?
410 * Salt handling: if encrypting generate a salt and write to
411 * output BIO. If decrypting read salt from input BIO.
419 if (!set_hex(hsalt, salt, sizeof salt)) {
420 BIO_printf(bio_err, "invalid hex salt value\n");
423 } else if (RAND_bytes(salt, sizeof salt) <= 0)
426 * If -P option then don't bother writing
429 && (BIO_write(wbio, magic,
430 sizeof magic - 1) != sizeof magic - 1
433 sizeof salt) != sizeof salt)) {
434 BIO_printf(bio_err, "error writing output file\n");
437 } else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
439 (unsigned char *)salt,
440 sizeof salt) != sizeof salt) {
441 BIO_printf(bio_err, "error reading input file\n");
443 } else if (memcmp(mbuf, magic, sizeof magic - 1)) {
444 BIO_printf(bio_err, "bad magic number\n");
451 if (!EVP_BytesToKey(cipher, dgst, sptr,
452 (unsigned char *)str,
453 strlen(str), 1, key, iv)) {
454 BIO_printf(bio_err, "EVP_BytesToKey failed\n");
458 * zero the complete buffer or the string passed from the command
459 * line bug picked up by Larry J. Hughes Jr. <hughes@indiana.edu>
462 OPENSSL_cleanse(str, SIZE);
464 OPENSSL_cleanse(str, strlen(str));
467 int siz = EVP_CIPHER_iv_length(cipher);
469 BIO_printf(bio_err, "warning: iv not use by this cipher\n");
470 } else if (!set_hex(hiv, iv, sizeof iv)) {
471 BIO_printf(bio_err, "invalid hex iv value\n");
475 if ((hiv == NULL) && (str == NULL)
476 && EVP_CIPHER_iv_length(cipher) != 0) {
478 * No IV was explicitly set and no IV was generated during
479 * EVP_BytesToKey. Hence the IV is undefined, making correct
480 * decryption impossible.
482 BIO_printf(bio_err, "iv undefined\n");
485 if ((hkey != NULL) && !set_hex(hkey, key, EVP_CIPHER_key_length(cipher))) {
486 BIO_printf(bio_err, "invalid hex key value\n");
490 if ((benc = BIO_new(BIO_f_cipher())) == NULL)
494 * Since we may be changing parameters work on the encryption context
495 * rather than calling BIO_set_cipher().
498 BIO_get_cipher_ctx(benc, &ctx);
500 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) {
501 BIO_printf(bio_err, "Error setting cipher %s\n",
502 EVP_CIPHER_name(cipher));
503 ERR_print_errors(bio_err);
508 EVP_CIPHER_CTX_set_padding(ctx, 0);
510 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
511 BIO_printf(bio_err, "Error setting cipher %s\n",
512 EVP_CIPHER_name(cipher));
513 ERR_print_errors(bio_err);
518 BIO_set_callback(benc, BIO_debug_callback);
519 BIO_set_callback_arg(benc, (char *)bio_err);
525 for (i = 0; i < (int)sizeof(salt); i++)
526 printf("%02X", salt[i]);
529 if (cipher->key_len > 0) {
531 for (i = 0; i < cipher->key_len; i++)
532 printf("%02X", key[i]);
535 if (cipher->iv_len > 0) {
537 for (i = 0; i < cipher->iv_len; i++)
538 printf("%02X", iv[i]);
548 /* Only encrypt/decrypt as we write the file */
550 wbio = BIO_push(benc, wbio);
553 inl = BIO_read(rbio, (char *)buff, bsize);
556 if (BIO_write(wbio, (char *)buff, inl) != inl) {
557 BIO_printf(bio_err, "error writing output file\n");
561 if (!BIO_flush(wbio)) {
562 BIO_printf(bio_err, "bad decrypt\n");
568 BIO_printf(bio_err, "bytes read :%8"PRIu64"\n", BIO_number_read(in));
569 BIO_printf(bio_err, "bytes written:%8"PRIu64"\n", BIO_number_written(out));
572 ERR_print_errors(bio_err);
573 OPENSSL_free(strbuf);
586 static void show_ciphers(const OBJ_NAME *name, void *bio_)
591 if (!islower((unsigned char)*name->name))
594 BIO_printf(bio, "-%-25s", name->name);
596 BIO_printf(bio, "\n");
599 BIO_printf(bio, " ");
602 static int set_hex(char *in, unsigned char *out, int size)
608 if (n > (size * 2)) {
609 BIO_printf(bio_err, "hex string is too long\n");
612 memset(out, 0, size);
613 for (i = 0; i < n; i++) {
614 j = (unsigned char)*in;
619 BIO_printf(bio_err, "non-hex digit\n");
622 j = (unsigned char)app_hex(j);
626 out[i / 2] = (j << 4);