2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
16 #include <openssl/bio.h>
17 #include <openssl/err.h>
18 #include <openssl/evp.h>
19 #include <openssl/objects.h>
20 #include <openssl/x509.h>
21 #include <openssl/rand.h>
22 #include <openssl/pem.h>
23 #ifndef OPENSSL_NO_COMP
24 # include <openssl/comp.h>
31 #define BSIZE (8*1024)
33 static int set_hex(const char *in, unsigned char *out, int size);
34 static void show_ciphers(const OBJ_NAME *name, void *bio_);
36 struct doall_enc_ciphers {
41 typedef enum OPTION_choice {
42 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
44 OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
45 OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
46 OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
47 OPT_UPPER_S, OPT_IV, OPT_MD, OPT_ITER, OPT_PBKDF2, OPT_CIPHER,
51 const OPTIONS enc_options[] = {
52 {"help", OPT_HELP, '-', "Display this summary"},
53 {"ciphers", OPT_LIST, '-', "List ciphers"},
54 {"in", OPT_IN, '<', "Input file"},
55 {"out", OPT_OUT, '>', "Output file"},
56 {"pass", OPT_PASS, 's', "Passphrase source"},
57 {"e", OPT_E, '-', "Encrypt"},
58 {"d", OPT_D, '-', "Decrypt"},
59 {"p", OPT_P, '-', "Print the iv/key"},
60 {"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
61 {"v", OPT_V, '-', "Verbose output"},
62 {"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
63 {"salt", OPT_SALT, '-', "Use salt in the KDF (default)"},
64 {"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"},
65 {"debug", OPT_DEBUG, '-', "Print debug info"},
66 {"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"},
67 {"base64", OPT_A, '-', "Same as option -a"},
68 {"A", OPT_UPPER_A, '-',
69 "Used with -[base64|a] to specify base64 buffer as a single line"},
70 {"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
71 {"k", OPT_K, 's', "Passphrase"},
72 {"kfile", OPT_KFILE, '<', "Read passphrase from file"},
73 {"K", OPT_UPPER_K, 's', "Raw key, in hex"},
74 {"S", OPT_UPPER_S, 's', "Salt, in hex"},
75 {"iv", OPT_IV, 's', "IV in hex"},
76 {"md", OPT_MD, 's', "Use specified digest to create a key from the passphrase"},
77 {"iter", OPT_ITER, 'p', "Specify the iteration count and force use of PBKDF2"},
78 {"pbkdf2", OPT_PBKDF2, '-', "Use password-based key derivation function 2"},
79 {"none", OPT_NONE, '-', "Don't encrypt"},
80 {"", OPT_CIPHER, '-', "Any supported cipher"},
83 {"z", OPT_Z, '-', "Use zlib as the 'encryption'"},
85 #ifndef OPENSSL_NO_ENGINE
86 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
91 int enc_main(int argc, char **argv)
94 static const char magic[] = "Salted__";
96 BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
98 EVP_CIPHER_CTX *ctx = NULL;
99 const EVP_CIPHER *cipher = NULL, *c;
100 const EVP_MD *dgst = NULL;
101 char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
102 char *infile = NULL, *outfile = NULL, *prog;
103 char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
104 char mbuf[sizeof(magic) - 1];
106 int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
107 int enc = 1, printkey = 0, i, k;
108 int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
109 int ret = 1, inl, nopad = 0;
110 unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
111 unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
115 struct doall_enc_ciphers dec;
121 /* first check the program name */
122 prog = opt_progname(argv[0]);
123 if (strcmp(prog, "base64") == 0) {
126 } else if (strcmp(prog, "zlib") == 0) {
130 cipher = EVP_get_cipherbyname(prog);
131 if (cipher == NULL && strcmp(prog, "enc") != 0) {
132 BIO_printf(bio_err, "%s is not a known cipher\n", prog);
137 prog = opt_init(argc, argv, enc_options);
138 while ((o = opt_next()) != OPT_EOF) {
143 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
146 opt_help(enc_options);
150 BIO_printf(bio_out, "Supported ciphers:\n");
153 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
155 BIO_printf(bio_out, "\n");
171 e = setup_engine(opt_arg(), 0);
210 i = (int)strlen(p) - 1;
211 k = i >= 1 && p[i] == 'k';
214 if (!opt_long(opt_arg(), &n)
215 || n < 0 || (k && n >= LONG_MAX / 1024))
225 in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
228 i = BIO_gets(in, buf, sizeof(buf));
233 "%s Can't read key from %s\n", prog, opt_arg());
236 while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
239 BIO_printf(bio_err, "%s: zero length password\n", prog);
254 if (!opt_md(opt_arg(), &dgst))
258 if (!opt_cipher(opt_unknown(), &c))
263 if (!opt_int(opt_arg(), &iter))
269 if (iter == 0) /* do not overwrite a chosen value */
281 if (opt_num_rest() != 0) {
282 BIO_printf(bio_err, "Extra arguments given.\n");
286 if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
287 BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);
291 if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) {
292 BIO_printf(bio_err, "%s XTS ciphers not supported\n", prog);
302 /* It must be large enough for a base64 encoded line */
303 if (base64 && bsize < 80)
306 BIO_printf(bio_err, "bufsize=%d\n", bsize);
313 outformat = FORMAT_BASE64;
315 informat = FORMAT_BASE64;
318 strbuf = app_malloc(SIZE, "strbuf");
319 buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
321 if (infile == NULL) {
322 in = dup_bio_in(informat);
324 in = bio_open_default(infile, 'r', informat);
329 if (str == NULL && passarg != NULL) {
330 if (!app_passwd(passarg, NULL, &pass, NULL)) {
331 BIO_printf(bio_err, "Error getting password\n");
337 if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
339 #ifndef OPENSSL_NO_UI_CONSOLE
343 BIO_snprintf(prompt, sizeof(prompt), "enter %s %s password:",
344 OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
345 (enc) ? "encryption" : "decryption");
347 i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc);
349 if (strbuf[0] == '\0') {
357 BIO_printf(bio_err, "bad password read\n");
363 BIO_printf(bio_err, "password required\n");
368 out = bio_open_default(outfile, 'w', outformat);
373 BIO_set_callback(in, BIO_debug_callback);
374 BIO_set_callback(out, BIO_debug_callback);
375 BIO_set_callback_arg(in, (char *)bio_err);
376 BIO_set_callback_arg(out, (char *)bio_err);
384 if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
387 BIO_set_callback(bzl, BIO_debug_callback);
388 BIO_set_callback_arg(bzl, (char *)bio_err);
391 wbio = BIO_push(bzl, wbio);
393 rbio = BIO_push(bzl, rbio);
398 if ((b64 = BIO_new(BIO_f_base64())) == NULL)
401 BIO_set_callback(b64, BIO_debug_callback);
402 BIO_set_callback_arg(b64, (char *)bio_err);
405 BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
407 wbio = BIO_push(b64, wbio);
409 rbio = BIO_push(b64, rbio);
412 if (cipher != NULL) {
414 * Note that str is NULL if a key was passed on the command line, so
415 * we get no salt in that case. Is this a bug?
419 * Salt handling: if encrypting generate a salt and write to
420 * output BIO. If decrypting read salt from input BIO.
423 size_t str_len = strlen(str);
430 if (!set_hex(hsalt, salt, sizeof(salt))) {
431 BIO_printf(bio_err, "invalid hex salt value\n");
434 } else if (RAND_bytes(salt, sizeof(salt)) <= 0) {
438 * If -P option then don't bother writing
441 && (BIO_write(wbio, magic,
442 sizeof(magic) - 1) != sizeof(magic) - 1
445 sizeof(salt)) != sizeof(salt))) {
446 BIO_printf(bio_err, "error writing output file\n");
449 } else if (BIO_read(rbio, mbuf, sizeof(mbuf)) != sizeof(mbuf)
451 (unsigned char *)salt,
452 sizeof(salt)) != sizeof(salt)) {
453 BIO_printf(bio_err, "error reading input file\n");
455 } else if (memcmp(mbuf, magic, sizeof(magic) - 1)) {
456 BIO_printf(bio_err, "bad magic number\n");
464 * derive key and default iv
465 * concatenated into a temporary buffer
467 unsigned char tmpkeyiv[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH];
468 int iklen = EVP_CIPHER_key_length(cipher);
469 int ivlen = EVP_CIPHER_iv_length(cipher);
470 /* not needed if HASH_UPDATE() is fixed : */
471 int islen = (sptr != NULL ? sizeof(salt) : 0);
472 if (!PKCS5_PBKDF2_HMAC(str, str_len, sptr, islen,
473 iter, dgst, iklen+ivlen, tmpkeyiv)) {
474 BIO_printf(bio_err, "PKCS5_PBKDF2_HMAC failed\n");
477 /* split and move data back to global buffer */
478 memcpy(key, tmpkeyiv, iklen);
479 memcpy(iv, tmpkeyiv+iklen, ivlen);
481 BIO_printf(bio_err, "*** WARNING : "
482 "deprecated key derivation used.\n"
483 "Using -iter or -pbkdf2 would be better.\n");
484 if (!EVP_BytesToKey(cipher, dgst, sptr,
485 (unsigned char *)str, str_len,
487 BIO_printf(bio_err, "EVP_BytesToKey failed\n");
492 * zero the complete buffer or the string passed from the command
496 OPENSSL_cleanse(str, SIZE);
498 OPENSSL_cleanse(str, str_len);
501 int siz = EVP_CIPHER_iv_length(cipher);
503 BIO_printf(bio_err, "warning: iv not used by this cipher\n");
504 } else if (!set_hex(hiv, iv, siz)) {
505 BIO_printf(bio_err, "invalid hex iv value\n");
509 if ((hiv == NULL) && (str == NULL)
510 && EVP_CIPHER_iv_length(cipher) != 0) {
512 * No IV was explicitly set and no IV was generated.
513 * Hence the IV is undefined, making correct decryption impossible.
515 BIO_printf(bio_err, "iv undefined\n");
519 if (!set_hex(hkey, key, EVP_CIPHER_key_length(cipher))) {
520 BIO_printf(bio_err, "invalid hex key value\n");
523 /* wiping secret data as we no longer need it */
524 OPENSSL_cleanse(hkey, strlen(hkey));
527 if ((benc = BIO_new(BIO_f_cipher())) == NULL)
531 * Since we may be changing parameters work on the encryption context
532 * rather than calling BIO_set_cipher().
535 BIO_get_cipher_ctx(benc, &ctx);
537 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) {
538 BIO_printf(bio_err, "Error setting cipher %s\n",
539 EVP_CIPHER_name(cipher));
540 ERR_print_errors(bio_err);
545 EVP_CIPHER_CTX_set_padding(ctx, 0);
547 if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
548 BIO_printf(bio_err, "Error setting cipher %s\n",
549 EVP_CIPHER_name(cipher));
550 ERR_print_errors(bio_err);
555 BIO_set_callback(benc, BIO_debug_callback);
556 BIO_set_callback_arg(benc, (char *)bio_err);
562 for (i = 0; i < (int)sizeof(salt); i++)
563 printf("%02X", salt[i]);
566 if (EVP_CIPHER_key_length(cipher) > 0) {
568 for (i = 0; i < EVP_CIPHER_key_length(cipher); i++)
569 printf("%02X", key[i]);
572 if (EVP_CIPHER_iv_length(cipher) > 0) {
574 for (i = 0; i < EVP_CIPHER_iv_length(cipher); i++)
575 printf("%02X", iv[i]);
585 /* Only encrypt/decrypt as we write the file */
587 wbio = BIO_push(benc, wbio);
590 inl = BIO_read(rbio, (char *)buff, bsize);
593 if (BIO_write(wbio, (char *)buff, inl) != inl) {
594 BIO_printf(bio_err, "error writing output file\n");
598 if (!BIO_flush(wbio)) {
599 BIO_printf(bio_err, "bad decrypt\n");
605 BIO_printf(bio_err, "bytes read : %8ju\n", BIO_number_read(in));
606 BIO_printf(bio_err, "bytes written: %8ju\n", BIO_number_written(out));
609 ERR_print_errors(bio_err);
610 OPENSSL_free(strbuf);
624 static void show_ciphers(const OBJ_NAME *name, void *arg)
626 struct doall_enc_ciphers *dec = (struct doall_enc_ciphers *)arg;
627 const EVP_CIPHER *cipher;
629 if (!islower((unsigned char)*name->name))
632 /* Filter out ciphers that we cannot use */
633 cipher = EVP_get_cipherbyname(name->name);
634 if (cipher == NULL ||
635 (EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0 ||
636 EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)
639 BIO_printf(dec->bio, "-%-25s", name->name);
641 BIO_printf(dec->bio, "\n");
644 BIO_printf(dec->bio, " ");
647 static int set_hex(const char *in, unsigned char *out, int size)
655 BIO_printf(bio_err, "hex string is too long, ignoring excess\n");
656 n = i; /* ignore exceeding part */
658 BIO_printf(bio_err, "hex string is too short, padding with zero bytes to length\n");
661 memset(out, 0, size);
662 for (i = 0; i < n; i++) {
663 j = (unsigned char)*in++;
665 BIO_printf(bio_err, "non-hex digit\n");
668 j = (unsigned char)OPENSSL_hexchar2int(j);
672 out[i / 2] = (j << 4);