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openssl/apps/enc.c
Richard Levitte 4b771121f2 RT2943: Check sizes if -iv and -K arguments 
RT2943 only complains about the incorrect check of -K argument size,
we might as well do the same thing with the -iv argument.

Before this, we only checked that the given argument wouldn't give a
bitstring larger than EVP_MAX_KEY_LENGTH.  we can be more precise and
check against the size of the actual cipher used.

(cherry picked from commit 8920a7cd04)

Reviewed-by: Rich Salz <rsalz@openssl.org>
2015-05-04 21:18:43 +02:00

715 lines
23 KiB
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/* apps/enc.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/rand.h>
#include <openssl/pem.h>
#ifndef OPENSSL_NO_COMP
# include <openssl/comp.h>
#endif
#include <ctype.h>
int set_hex(char *in, unsigned char *out, int size);
#undef SIZE
#undef BSIZE
#undef PROG
#define SIZE (512)
#define BSIZE (8*1024)
#define PROG enc_main
static void show_ciphers(const OBJ_NAME *name, void *bio_)
{
BIO *bio = bio_;
static int n;
if (!islower((unsigned char)*name->name))
return;
BIO_printf(bio, "-%-25s", name->name);
if (++n == 3) {
BIO_printf(bio, "\n");
n = 0;
} else
BIO_printf(bio, " ");
}
int MAIN(int, char **);
int MAIN(int argc, char **argv)
{
static const char magic[] = "Salted__";
char mbuf[sizeof magic - 1];
char *strbuf = NULL;
unsigned char *buff = NULL, *bufsize = NULL;
int bsize = BSIZE, verbose = 0;
int ret = 1, inl;
int nopad = 0;
unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
unsigned char salt[PKCS5_SALT_LEN];
char *str = NULL, *passarg = NULL, *pass = NULL;
char *hkey = NULL, *hiv = NULL, *hsalt = NULL;
char *md = NULL;
int enc = 1, printkey = 0, i, base64 = 0;
#ifdef ZLIB
int do_zlib = 0;
BIO *bzl = NULL;
#endif
int debug = 0, olb64 = 0, nosalt = 0;
const EVP_CIPHER *cipher = NULL, *c;
EVP_CIPHER_CTX *ctx = NULL;
char *inf = NULL, *outf = NULL;
BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
NULL, *wbio = NULL;
#define PROG_NAME_SIZE 39
char pname[PROG_NAME_SIZE + 1];
#ifndef OPENSSL_NO_ENGINE
char *engine = NULL;
#endif
const EVP_MD *dgst = NULL;
int non_fips_allow = 0;
apps_startup();
if (bio_err == NULL)
if ((bio_err = BIO_new(BIO_s_file())) != NULL)
BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
if (!load_config(bio_err, NULL))
goto end;
/* first check the program name */
program_name(argv[0], pname, sizeof pname);
if (strcmp(pname, "base64") == 0)
base64 = 1;
#ifdef ZLIB
if (strcmp(pname, "zlib") == 0)
do_zlib = 1;
#endif
cipher = EVP_get_cipherbyname(pname);
#ifdef ZLIB
if (!do_zlib && !base64 && (cipher == NULL)
&& (strcmp(pname, "enc") != 0))
#else
if (!base64 && (cipher == NULL) && (strcmp(pname, "enc") != 0))
#endif
{
BIO_printf(bio_err, "%s is an unknown cipher\n", pname);
goto bad;
}
argc--;
argv++;
while (argc >= 1) {
if (strcmp(*argv, "-e") == 0)
enc = 1;
else if (strcmp(*argv, "-in") == 0) {
if (--argc < 1)
goto bad;
inf = *(++argv);
} else if (strcmp(*argv, "-out") == 0) {
if (--argc < 1)
goto bad;
outf = *(++argv);
} else if (strcmp(*argv, "-pass") == 0) {
if (--argc < 1)
goto bad;
passarg = *(++argv);
}
#ifndef OPENSSL_NO_ENGINE
else if (strcmp(*argv, "-engine") == 0) {
if (--argc < 1)
goto bad;
engine = *(++argv);
}
#endif
else if (strcmp(*argv, "-d") == 0)
enc = 0;
else if (strcmp(*argv, "-p") == 0)
printkey = 1;
else if (strcmp(*argv, "-v") == 0)
verbose = 1;
else if (strcmp(*argv, "-nopad") == 0)
nopad = 1;
else if (strcmp(*argv, "-salt") == 0)
nosalt = 0;
else if (strcmp(*argv, "-nosalt") == 0)
nosalt = 1;
else if (strcmp(*argv, "-debug") == 0)
debug = 1;
else if (strcmp(*argv, "-P") == 0)
printkey = 2;
else if (strcmp(*argv, "-A") == 0)
olb64 = 1;
else if (strcmp(*argv, "-a") == 0)
base64 = 1;
else if (strcmp(*argv, "-base64") == 0)
base64 = 1;
#ifdef ZLIB
else if (strcmp(*argv, "-z") == 0)
do_zlib = 1;
#endif
else if (strcmp(*argv, "-bufsize") == 0) {
if (--argc < 1)
goto bad;
bufsize = (unsigned char *)*(++argv);
} else if (strcmp(*argv, "-k") == 0) {
if (--argc < 1)
goto bad;
str = *(++argv);
} else if (strcmp(*argv, "-kfile") == 0) {
static char buf[128];
FILE *infile;
char *file;
if (--argc < 1)
goto bad;
file = *(++argv);
infile = fopen(file, "r");
if (infile == NULL) {
BIO_printf(bio_err, "unable to read key from '%s'\n", file);
goto bad;
}
buf[0] = '\0';
if (!fgets(buf, sizeof buf, infile)) {
BIO_printf(bio_err, "unable to read key from '%s'\n", file);
goto bad;
}
fclose(infile);
i = strlen(buf);
if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
buf[--i] = '\0';
if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
buf[--i] = '\0';
if (i < 1) {
BIO_printf(bio_err, "zero length password\n");
goto bad;
}
str = buf;
} else if (strcmp(*argv, "-K") == 0) {
if (--argc < 1)
goto bad;
hkey = *(++argv);
} else if (strcmp(*argv, "-S") == 0) {
if (--argc < 1)
goto bad;
hsalt = *(++argv);
} else if (strcmp(*argv, "-iv") == 0) {
if (--argc < 1)
goto bad;
hiv = *(++argv);
} else if (strcmp(*argv, "-md") == 0) {
if (--argc < 1)
goto bad;
md = *(++argv);
} else if (strcmp(*argv, "-non-fips-allow") == 0)
non_fips_allow = 1;
else if ((argv[0][0] == '-') &&
((c = EVP_get_cipherbyname(&(argv[0][1]))) != NULL)) {
cipher = c;
} else if (strcmp(*argv, "-none") == 0)
cipher = NULL;
else {
BIO_printf(bio_err, "unknown option '%s'\n", *argv);
bad:
BIO_printf(bio_err, "options are\n");
BIO_printf(bio_err, "%-14s input file\n", "-in <file>");
BIO_printf(bio_err, "%-14s output file\n", "-out <file>");
BIO_printf(bio_err, "%-14s pass phrase source\n", "-pass <arg>");
BIO_printf(bio_err, "%-14s encrypt\n", "-e");
BIO_printf(bio_err, "%-14s decrypt\n", "-d");
BIO_printf(bio_err,
"%-14s base64 encode/decode, depending on encryption flag\n",
"-a/-base64");
BIO_printf(bio_err, "%-14s passphrase is the next argument\n",
"-k");
BIO_printf(bio_err,
"%-14s passphrase is the first line of the file argument\n",
"-kfile");
BIO_printf(bio_err,
"%-14s the next argument is the md to use to create a key\n",
"-md");
BIO_printf(bio_err,
"%-14s from a passphrase. One of md2, md5, sha or sha1\n",
"");
BIO_printf(bio_err, "%-14s salt in hex is the next argument\n",
"-S");
BIO_printf(bio_err, "%-14s key/iv in hex is the next argument\n",
"-K/-iv");
BIO_printf(bio_err, "%-14s print the iv/key (then exit if -P)\n",
"-[pP]");
BIO_printf(bio_err, "%-14s buffer size\n", "-bufsize <n>");
BIO_printf(bio_err, "%-14s disable standard block padding\n",
"-nopad");
#ifndef OPENSSL_NO_ENGINE
BIO_printf(bio_err,
"%-14s use engine e, possibly a hardware device.\n",
"-engine e");
#endif
BIO_printf(bio_err, "Cipher Types\n");
OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
show_ciphers, bio_err);
BIO_printf(bio_err, "\n");
goto end;
}
argc--;
argv++;
}
#ifndef OPENSSL_NO_ENGINE
setup_engine(bio_err, engine, 0);
#endif
if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
BIO_printf(bio_err,
"AEAD ciphers not supported by the enc utility\n");
goto end;
}
if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) {
BIO_printf(bio_err,
"Ciphers in XTS mode are not supported by the enc utility\n");
goto end;
}
if (md && (dgst = EVP_get_digestbyname(md)) == NULL) {
BIO_printf(bio_err, "%s is an unsupported message digest type\n", md);
goto end;
}
if (dgst == NULL) {
dgst = EVP_md5();
}
if (bufsize != NULL) {
unsigned long n;
for (n = 0; *bufsize; bufsize++) {
i = *bufsize;
if ((i <= '9') && (i >= '0'))
n = n * 10 + i - '0';
else if (i == 'k') {
n *= 1024;
bufsize++;
break;
}
}
if (*bufsize != '\0') {
BIO_printf(bio_err, "invalid 'bufsize' specified.\n");
goto end;
}
/* It must be large enough for a base64 encoded line */
if (base64 && n < 80)
n = 80;
bsize = (int)n;
if (verbose)
BIO_printf(bio_err, "bufsize=%d\n", bsize);
}
strbuf = OPENSSL_malloc(SIZE);
buff = (unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
if ((buff == NULL) || (strbuf == NULL)) {
BIO_printf(bio_err, "OPENSSL_malloc failure %ld\n",
(long)EVP_ENCODE_LENGTH(bsize));
goto end;
}
in = BIO_new(BIO_s_file());
out = BIO_new(BIO_s_file());
if ((in == NULL) || (out == NULL)) {
ERR_print_errors(bio_err);
goto end;
}
if (debug) {
BIO_set_callback(in, BIO_debug_callback);
BIO_set_callback(out, BIO_debug_callback);
BIO_set_callback_arg(in, (char *)bio_err);
BIO_set_callback_arg(out, (char *)bio_err);
}
if (inf == NULL) {
#ifndef OPENSSL_NO_SETVBUF_IONBF
if (bufsize != NULL)
setvbuf(stdin, (char *)NULL, _IONBF, 0);
#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
BIO_set_fp(in, stdin, BIO_NOCLOSE);
} else {
if (BIO_read_filename(in, inf) <= 0) {
perror(inf);
goto end;
}
}
if (!str && passarg) {
if (!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
BIO_printf(bio_err, "Error getting password\n");
goto end;
}
str = pass;
}
if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
for (;;) {
char buf[200];
BIO_snprintf(buf, sizeof buf, "enter %s %s password:",
OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
(enc) ? "encryption" : "decryption");
strbuf[0] = '\0';
i = EVP_read_pw_string((char *)strbuf, SIZE, buf, enc);
if (i == 0) {
if (strbuf[0] == '\0') {
ret = 1;
goto end;
}
str = strbuf;
break;
}
if (i < 0) {
BIO_printf(bio_err, "bad password read\n");
goto end;
}
}
}
if (outf == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
#ifndef OPENSSL_NO_SETVBUF_IONBF
if (bufsize != NULL)
setvbuf(stdout, (char *)NULL, _IONBF, 0);
#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
#ifdef OPENSSL_SYS_VMS
{
BIO *tmpbio = BIO_new(BIO_f_linebuffer());
out = BIO_push(tmpbio, out);
}
#endif
} else {
if (BIO_write_filename(out, outf) <= 0) {
perror(outf);
goto end;
}
}
rbio = in;
wbio = out;
#ifdef ZLIB
if (do_zlib) {
if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
goto end;
if (enc)
wbio = BIO_push(bzl, wbio);
else
rbio = BIO_push(bzl, rbio);
}
#endif
if (base64) {
if ((b64 = BIO_new(BIO_f_base64())) == NULL)
goto end;
if (debug) {
BIO_set_callback(b64, BIO_debug_callback);
BIO_set_callback_arg(b64, (char *)bio_err);
}
if (olb64)
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
if (enc)
wbio = BIO_push(b64, wbio);
else
rbio = BIO_push(b64, rbio);
}
if (cipher != NULL) {
/*
* Note that str is NULL if a key was passed on the command line, so
* we get no salt in that case. Is this a bug?
*/
if (str != NULL) {
/*
* Salt handling: if encrypting generate a salt and write to
* output BIO. If decrypting read salt from input BIO.
*/
unsigned char *sptr;
if (nosalt)
sptr = NULL;
else {
if (enc) {
if (hsalt) {
if (!set_hex(hsalt, salt, sizeof salt)) {
BIO_printf(bio_err, "invalid hex salt value\n");
goto end;
}
} else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
goto end;
/*
* If -P option then don't bother writing
*/
if ((printkey != 2)
&& (BIO_write(wbio, magic,
sizeof magic - 1) != sizeof magic - 1
|| BIO_write(wbio,
(char *)salt,
sizeof salt) != sizeof salt)) {
BIO_printf(bio_err, "error writing output file\n");
goto end;
}
} else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
|| BIO_read(rbio,
(unsigned char *)salt,
sizeof salt) != sizeof salt) {
BIO_printf(bio_err, "error reading input file\n");
goto end;
} else if (memcmp(mbuf, magic, sizeof magic - 1)) {
BIO_printf(bio_err, "bad magic number\n");
goto end;
}
sptr = salt;
}
EVP_BytesToKey(cipher, dgst, sptr,
(unsigned char *)str, strlen(str), 1, key, iv);
/*
* zero the complete buffer or the string passed from the command
* line bug picked up by Larry J. Hughes Jr. <hughes@indiana.edu>
*/
if (str == strbuf)
OPENSSL_cleanse(str, SIZE);
else
OPENSSL_cleanse(str, strlen(str));
}
if (hiv != NULL) {
int siz = EVP_CIPHER_iv_length(cipher);
if (siz == 0) {
BIO_printf(bio_err, "warning: iv not use by this cipher\n");
} else if (!set_hex(hiv, iv, sizeof iv)) {
BIO_printf(bio_err, "invalid hex iv value\n");
goto end;
}
}
if ((hiv == NULL) && (str == NULL)
&& EVP_CIPHER_iv_length(cipher) != 0) {
/*
* No IV was explicitly set and no IV was generated during
* EVP_BytesToKey. Hence the IV is undefined, making correct
* decryption impossible.
*/
BIO_printf(bio_err, "iv undefined\n");
goto end;
}
if ((hkey != NULL) && !set_hex(hkey, key, EVP_CIPHER_key_length(cipher))) {
BIO_printf(bio_err, "invalid hex key value\n");
goto end;
}
if ((benc = BIO_new(BIO_f_cipher())) == NULL)
goto end;
/*
* Since we may be changing parameters work on the encryption context
* rather than calling BIO_set_cipher().
*/
BIO_get_cipher_ctx(benc, &ctx);
if (non_fips_allow)
EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPH_FLAG_NON_FIPS_ALLOW);
if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) {
BIO_printf(bio_err, "Error setting cipher %s\n",
EVP_CIPHER_name(cipher));
ERR_print_errors(bio_err);
goto end;
}
if (nopad)
EVP_CIPHER_CTX_set_padding(ctx, 0);
if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
BIO_printf(bio_err, "Error setting cipher %s\n",
EVP_CIPHER_name(cipher));
ERR_print_errors(bio_err);
goto end;
}
if (debug) {
BIO_set_callback(benc, BIO_debug_callback);
BIO_set_callback_arg(benc, (char *)bio_err);
}
if (printkey) {
if (!nosalt) {
printf("salt=");
for (i = 0; i < (int)sizeof(salt); i++)
printf("%02X", salt[i]);
printf("\n");
}
if (cipher->key_len > 0) {
printf("key=");
for (i = 0; i < cipher->key_len; i++)
printf("%02X", key[i]);
printf("\n");
}
if (cipher->iv_len > 0) {
printf("iv =");
for (i = 0; i < cipher->iv_len; i++)
printf("%02X", iv[i]);
printf("\n");
}
if (printkey == 2) {
ret = 0;
goto end;
}
}
}
/* Only encrypt/decrypt as we write the file */
if (benc != NULL)
wbio = BIO_push(benc, wbio);
for (;;) {
inl = BIO_read(rbio, (char *)buff, bsize);
if (inl <= 0)
break;
if (BIO_write(wbio, (char *)buff, inl) != inl) {
BIO_printf(bio_err, "error writing output file\n");
goto end;
}
}
if (!BIO_flush(wbio)) {
BIO_printf(bio_err, "bad decrypt\n");
goto end;
}
ret = 0;
if (verbose) {
BIO_printf(bio_err, "bytes read :%8ld\n", BIO_number_read(in));
BIO_printf(bio_err, "bytes written:%8ld\n", BIO_number_written(out));
}
end:
ERR_print_errors(bio_err);
if (strbuf != NULL)
OPENSSL_free(strbuf);
if (buff != NULL)
OPENSSL_free(buff);
if (in != NULL)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (benc != NULL)
BIO_free(benc);
if (b64 != NULL)
BIO_free(b64);
#ifdef ZLIB
if (bzl != NULL)
BIO_free(bzl);
#endif
if (pass)
OPENSSL_free(pass);
apps_shutdown();
OPENSSL_EXIT(ret);
}
int set_hex(char *in, unsigned char *out, int size)
{
int i, n;
unsigned char j;
n = strlen(in);
if (n > (size * 2)) {
BIO_printf(bio_err, "hex string is too long\n");
return (0);
}
memset(out, 0, size);
for (i = 0; i < n; i++) {
j = (unsigned char)*in;
*(in++) = '\0';
if (j == 0)
break;
if ((j >= '0') && (j <= '9'))
j -= '0';
else if ((j >= 'A') && (j <= 'F'))
j = j - 'A' + 10;
else if ((j >= 'a') && (j <= 'f'))
j = j - 'a' + 10;
else {
BIO_printf(bio_err, "non-hex digit\n");
return (0);
}
if (i & 1)
out[i / 2] |= j;
else
out[i / 2] = (j << 4);
}
return (1);
}
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