2 * Copyright 1995-2017 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
15 #include <openssl/bio.h>
16 #include <openssl/err.h>
17 #include <openssl/evp.h>
18 #include <openssl/objects.h>
19 #include <openssl/x509.h>
20 #include <openssl/rand.h>
21 #include <openssl/pem.h>
22 #ifndef OPENSSL_NO_COMP
23 # include <openssl/comp.h>
30 #define BSIZE (8*1024)
32 static int set_hex(char *in
, unsigned char *out
, int size
);
33 static void show_ciphers(const OBJ_NAME
*name
, void *bio_
);
35 struct doall_enc_ciphers
{
40 typedef enum OPTION_choice
{
41 OPT_ERR
= -1, OPT_EOF
= 0, OPT_HELP
,
43 OPT_E
, OPT_IN
, OPT_OUT
, OPT_PASS
, OPT_ENGINE
, OPT_D
, OPT_P
, OPT_V
,
44 OPT_NOPAD
, OPT_SALT
, OPT_NOSALT
, OPT_DEBUG
, OPT_UPPER_P
, OPT_UPPER_A
,
45 OPT_A
, OPT_Z
, OPT_BUFSIZE
, OPT_K
, OPT_KFILE
, OPT_UPPER_K
, OPT_NONE
,
46 OPT_UPPER_S
, OPT_IV
, OPT_MD
, OPT_CIPHER
49 const OPTIONS enc_options
[] = {
50 {"help", OPT_HELP
, '-', "Display this summary"},
51 {"ciphers", OPT_LIST
, '-', "List ciphers"},
52 {"in", OPT_IN
, '<', "Input file"},
53 {"out", OPT_OUT
, '>', "Output file"},
54 {"pass", OPT_PASS
, 's', "Passphrase source"},
55 {"e", OPT_E
, '-', "Encrypt"},
56 {"d", OPT_D
, '-', "Decrypt"},
57 {"p", OPT_P
, '-', "Print the iv/key"},
58 {"P", OPT_UPPER_P
, '-', "Print the iv/key and exit"},
59 {"v", OPT_V
, '-', "Verbose output"},
60 {"nopad", OPT_NOPAD
, '-', "Disable standard block padding"},
61 {"salt", OPT_SALT
, '-', "Use salt in the KDF (default)"},
62 {"nosalt", OPT_NOSALT
, '-', "Do not use salt in the KDF"},
63 {"debug", OPT_DEBUG
, '-', "Print debug info"},
64 {"a", OPT_A
, '-', "Base64 encode/decode, depending on encryption flag"},
65 {"base64", OPT_A
, '-', "Same as option -a"},
66 {"A", OPT_UPPER_A
, '-',
67 "Used with -[base64|a] to specify base64 buffer as a single line"},
68 {"bufsize", OPT_BUFSIZE
, 's', "Buffer size"},
69 {"k", OPT_K
, 's', "Passphrase"},
70 {"kfile", OPT_KFILE
, '<', "Read passphrase from file"},
71 {"K", OPT_UPPER_K
, 's', "Raw key, in hex"},
72 {"S", OPT_UPPER_S
, 's', "Salt, in hex"},
73 {"iv", OPT_IV
, 's', "IV in hex"},
74 {"md", OPT_MD
, 's', "Use specified digest to create a key from the passphrase"},
75 {"none", OPT_NONE
, '-', "Don't encrypt"},
76 {"", OPT_CIPHER
, '-', "Any supported cipher"},
78 {"z", OPT_Z
, '-', "Use zlib as the 'encryption'"},
80 #ifndef OPENSSL_NO_ENGINE
81 {"engine", OPT_ENGINE
, 's', "Use engine, possibly a hardware device"},
86 int enc_main(int argc
, char **argv
)
89 static const char magic
[] = "Salted__";
91 BIO
*in
= NULL
, *out
= NULL
, *b64
= NULL
, *benc
= NULL
, *rbio
=
93 EVP_CIPHER_CTX
*ctx
= NULL
;
94 const EVP_CIPHER
*cipher
= NULL
, *c
;
95 const EVP_MD
*dgst
= NULL
;
96 char *hkey
= NULL
, *hiv
= NULL
, *hsalt
= NULL
, *p
;
97 char *infile
= NULL
, *outfile
= NULL
, *prog
;
98 char *str
= NULL
, *passarg
= NULL
, *pass
= NULL
, *strbuf
= NULL
;
99 char mbuf
[sizeof magic
- 1];
101 int bsize
= BSIZE
, verbose
= 0, debug
= 0, olb64
= 0, nosalt
= 0;
102 int enc
= 1, printkey
= 0, i
, k
;
103 int base64
= 0, informat
= FORMAT_BINARY
, outformat
= FORMAT_BINARY
;
104 int ret
= 1, inl
, nopad
= 0;
105 unsigned char key
[EVP_MAX_KEY_LENGTH
], iv
[EVP_MAX_IV_LENGTH
];
106 unsigned char *buff
= NULL
, salt
[PKCS5_SALT_LEN
];
108 struct doall_enc_ciphers dec
;
114 /* first check the program name */
115 prog
= opt_progname(argv
[0]);
116 if (strcmp(prog
, "base64") == 0) {
119 } else if (strcmp(prog
, "zlib") == 0) {
123 cipher
= EVP_get_cipherbyname(prog
);
124 if (cipher
== NULL
&& strcmp(prog
, "enc") != 0) {
125 BIO_printf(bio_err
, "%s is not a known cipher\n", prog
);
130 prog
= opt_init(argc
, argv
, enc_options
);
131 while ((o
= opt_next()) != OPT_EOF
) {
136 BIO_printf(bio_err
, "%s: Use -help for summary.\n", prog
);
139 opt_help(enc_options
);
143 BIO_printf(bio_out
, "Supported ciphers:\n");
146 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH
,
148 BIO_printf(bio_out
, "\n");
164 e
= setup_engine(opt_arg(), 0);
203 i
= (int)strlen(p
) - 1;
204 k
= i
>= 1 && p
[i
] == 'k';
207 if (!opt_long(opt_arg(), &n
)
208 || n
< 0 || (k
&& n
>= LONG_MAX
/ 1024))
218 in
= bio_open_default(opt_arg(), 'r', FORMAT_TEXT
);
221 i
= BIO_gets(in
, buf
, sizeof buf
);
226 "%s Can't read key from %s\n", prog
, opt_arg());
229 while (--i
> 0 && (buf
[i
] == '\r' || buf
[i
] == '\n'))
232 BIO_printf(bio_err
, "%s: zero length password\n", prog
);
247 if (!opt_md(opt_arg(), &dgst
))
251 if (!opt_cipher(opt_unknown(), &c
))
261 if (cipher
&& EVP_CIPHER_flags(cipher
) & EVP_CIPH_FLAG_AEAD_CIPHER
) {
262 BIO_printf(bio_err
, "%s: AEAD ciphers not supported\n", prog
);
266 if (cipher
&& (EVP_CIPHER_mode(cipher
) == EVP_CIPH_XTS_MODE
)) {
267 BIO_printf(bio_err
, "%s XTS ciphers not supported\n", prog
);
274 /* It must be large enough for a base64 encoded line */
275 if (base64
&& bsize
< 80)
278 BIO_printf(bio_err
, "bufsize=%d\n", bsize
);
285 outformat
= FORMAT_BASE64
;
287 informat
= FORMAT_BASE64
;
290 strbuf
= app_malloc(SIZE
, "strbuf");
291 buff
= app_malloc(EVP_ENCODE_LENGTH(bsize
), "evp buffer");
293 if (infile
== NULL
) {
294 in
= dup_bio_in(informat
);
296 in
= bio_open_default(infile
, 'r', informat
);
301 if (str
== NULL
&& passarg
!= NULL
) {
302 if (!app_passwd(passarg
, NULL
, &pass
, NULL
)) {
303 BIO_printf(bio_err
, "Error getting password\n");
309 if ((str
== NULL
) && (cipher
!= NULL
) && (hkey
== NULL
)) {
311 #ifndef OPENSSL_NO_UI
315 BIO_snprintf(prompt
, sizeof prompt
, "enter %s %s password:",
316 OBJ_nid2ln(EVP_CIPHER_nid(cipher
)),
317 (enc
) ? "encryption" : "decryption");
319 i
= EVP_read_pw_string((char *)strbuf
, SIZE
, prompt
, enc
);
321 if (strbuf
[0] == '\0') {
329 BIO_printf(bio_err
, "bad password read\n");
335 BIO_printf(bio_err
, "password required\n");
340 out
= bio_open_default(outfile
, 'w', outformat
);
345 BIO_set_callback(in
, BIO_debug_callback
);
346 BIO_set_callback(out
, BIO_debug_callback
);
347 BIO_set_callback_arg(in
, (char *)bio_err
);
348 BIO_set_callback_arg(out
, (char *)bio_err
);
356 if ((bzl
= BIO_new(BIO_f_zlib())) == NULL
)
359 BIO_set_callback(bzl
, BIO_debug_callback
);
360 BIO_set_callback_arg(bzl
, (char *)bio_err
);
363 wbio
= BIO_push(bzl
, wbio
);
365 rbio
= BIO_push(bzl
, rbio
);
370 if ((b64
= BIO_new(BIO_f_base64())) == NULL
)
373 BIO_set_callback(b64
, BIO_debug_callback
);
374 BIO_set_callback_arg(b64
, (char *)bio_err
);
377 BIO_set_flags(b64
, BIO_FLAGS_BASE64_NO_NL
);
379 wbio
= BIO_push(b64
, wbio
);
381 rbio
= BIO_push(b64
, rbio
);
384 if (cipher
!= NULL
) {
386 * Note that str is NULL if a key was passed on the command line, so
387 * we get no salt in that case. Is this a bug?
391 * Salt handling: if encrypting generate a salt and write to
392 * output BIO. If decrypting read salt from input BIO.
395 size_t str_len
= strlen(str
);
402 if (!set_hex(hsalt
, salt
, sizeof salt
)) {
403 BIO_printf(bio_err
, "invalid hex salt value\n");
406 } else if (RAND_bytes(salt
, sizeof salt
) <= 0) {
410 * If -P option then don't bother writing
413 && (BIO_write(wbio
, magic
,
414 sizeof magic
- 1) != sizeof magic
- 1
417 sizeof salt
) != sizeof salt
)) {
418 BIO_printf(bio_err
, "error writing output file\n");
421 } else if (BIO_read(rbio
, mbuf
, sizeof mbuf
) != sizeof mbuf
423 (unsigned char *)salt
,
424 sizeof salt
) != sizeof salt
) {
425 BIO_printf(bio_err
, "error reading input file\n");
427 } else if (memcmp(mbuf
, magic
, sizeof magic
- 1)) {
428 BIO_printf(bio_err
, "bad magic number\n");
435 if (!EVP_BytesToKey(cipher
, dgst
, sptr
,
436 (unsigned char *)str
,
437 str_len
, 1, key
, iv
)) {
438 BIO_printf(bio_err
, "EVP_BytesToKey failed\n");
442 * zero the complete buffer or the string passed from the command
443 * line bug picked up by Larry J. Hughes Jr. <hughes@indiana.edu>
446 OPENSSL_cleanse(str
, SIZE
);
448 OPENSSL_cleanse(str
, str_len
);
451 int siz
= EVP_CIPHER_iv_length(cipher
);
453 BIO_printf(bio_err
, "warning: iv not use by this cipher\n");
454 } else if (!set_hex(hiv
, iv
, sizeof iv
)) {
455 BIO_printf(bio_err
, "invalid hex iv value\n");
459 if ((hiv
== NULL
) && (str
== NULL
)
460 && EVP_CIPHER_iv_length(cipher
) != 0) {
462 * No IV was explicitly set and no IV was generated during
463 * EVP_BytesToKey. Hence the IV is undefined, making correct
464 * decryption impossible.
466 BIO_printf(bio_err
, "iv undefined\n");
469 if ((hkey
!= NULL
) && !set_hex(hkey
, key
, EVP_CIPHER_key_length(cipher
))) {
470 BIO_printf(bio_err
, "invalid hex key value\n");
474 if ((benc
= BIO_new(BIO_f_cipher())) == NULL
)
478 * Since we may be changing parameters work on the encryption context
479 * rather than calling BIO_set_cipher().
482 BIO_get_cipher_ctx(benc
, &ctx
);
484 if (!EVP_CipherInit_ex(ctx
, cipher
, NULL
, NULL
, NULL
, enc
)) {
485 BIO_printf(bio_err
, "Error setting cipher %s\n",
486 EVP_CIPHER_name(cipher
));
487 ERR_print_errors(bio_err
);
492 EVP_CIPHER_CTX_set_padding(ctx
, 0);
494 if (!EVP_CipherInit_ex(ctx
, NULL
, NULL
, key
, iv
, enc
)) {
495 BIO_printf(bio_err
, "Error setting cipher %s\n",
496 EVP_CIPHER_name(cipher
));
497 ERR_print_errors(bio_err
);
502 BIO_set_callback(benc
, BIO_debug_callback
);
503 BIO_set_callback_arg(benc
, (char *)bio_err
);
509 for (i
= 0; i
< (int)sizeof(salt
); i
++)
510 printf("%02X", salt
[i
]);
513 if (EVP_CIPHER_key_length(cipher
) > 0) {
515 for (i
= 0; i
< EVP_CIPHER_key_length(cipher
); i
++)
516 printf("%02X", key
[i
]);
519 if (EVP_CIPHER_iv_length(cipher
) > 0) {
521 for (i
= 0; i
< EVP_CIPHER_iv_length(cipher
); i
++)
522 printf("%02X", iv
[i
]);
532 /* Only encrypt/decrypt as we write the file */
534 wbio
= BIO_push(benc
, wbio
);
537 inl
= BIO_read(rbio
, (char *)buff
, bsize
);
540 if (BIO_write(wbio
, (char *)buff
, inl
) != inl
) {
541 BIO_printf(bio_err
, "error writing output file\n");
545 if (!BIO_flush(wbio
)) {
546 BIO_printf(bio_err
, "bad decrypt\n");
552 BIO_printf(bio_err
, "bytes read :%8ju\n", BIO_number_read(in
));
553 BIO_printf(bio_err
, "bytes written:%8ju\n", BIO_number_written(out
));
556 ERR_print_errors(bio_err
);
557 OPENSSL_free(strbuf
);
571 static void show_ciphers(const OBJ_NAME
*name
, void *arg
)
573 struct doall_enc_ciphers
*dec
= (struct doall_enc_ciphers
*)arg
;
574 const EVP_CIPHER
*cipher
;
576 if (!islower((unsigned char)*name
->name
))
579 /* Filter out ciphers that we cannot use */
580 cipher
= EVP_get_cipherbyname(name
->name
);
581 if (cipher
== NULL
||
582 (EVP_CIPHER_flags(cipher
) & EVP_CIPH_FLAG_AEAD_CIPHER
) != 0 ||
583 EVP_CIPHER_mode(cipher
) == EVP_CIPH_XTS_MODE
)
586 BIO_printf(dec
->bio
, "-%-25s", name
->name
);
588 BIO_printf(dec
->bio
, "\n");
591 BIO_printf(dec
->bio
, " ");
594 static int set_hex(char *in
, unsigned char *out
, int size
)
600 if (n
> (size
* 2)) {
601 BIO_printf(bio_err
, "hex string is too long\n");
604 memset(out
, 0, size
);
605 for (i
= 0; i
< n
; i
++) {
606 j
= (unsigned char)*in
;
611 BIO_printf(bio_err
, "non-hex digit\n");
614 j
= (unsigned char)OPENSSL_hexchar2int(j
);
618 out
[i
/ 2] = (j
<< 4);