656 lines
21 KiB
C
656 lines
21 KiB
C
/* apps/enc.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "apps.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include <openssl/rand.h>
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#include <openssl/pem.h>
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#include <ctype.h>
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int set_hex(char *in, unsigned char *out, int size);
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#undef SIZE
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#undef BSIZE
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#undef PROG
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#define SIZE (512)
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#define BSIZE (8*1024)
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#define PROG enc_main
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static void show_ciphers(const OBJ_NAME *name, void *bio_)
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{
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BIO *bio = bio_;
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static int n;
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if (!islower((unsigned char)*name->name))
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return;
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BIO_printf(bio, "-%-25s", name->name);
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if (++n == 3) {
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BIO_printf(bio, "\n");
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n = 0;
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} else
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BIO_printf(bio, " ");
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}
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int MAIN(int, char **);
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int MAIN(int argc, char **argv)
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{
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static const char magic[] = "Salted__";
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char mbuf[sizeof magic - 1];
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char *strbuf = NULL;
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unsigned char *buff = NULL, *bufsize = NULL;
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int bsize = BSIZE, verbose = 0;
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int ret = 1, inl;
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int nopad = 0;
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unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
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unsigned char salt[PKCS5_SALT_LEN];
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char *str = NULL, *passarg = NULL, *pass = NULL;
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char *hkey = NULL, *hiv = NULL, *hsalt = NULL;
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char *md = NULL;
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int enc = 1, printkey = 0, i, base64 = 0;
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int debug = 0, olb64 = 0, nosalt = 0;
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const EVP_CIPHER *cipher = NULL, *c;
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EVP_CIPHER_CTX *ctx = NULL;
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char *inf = NULL, *outf = NULL;
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BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
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NULL, *wbio = NULL;
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#define PROG_NAME_SIZE 39
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char pname[PROG_NAME_SIZE + 1];
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#ifndef OPENSSL_NO_ENGINE
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char *engine = NULL;
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#endif
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const EVP_MD *dgst = NULL;
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int non_fips_allow = 0;
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apps_startup();
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if (bio_err == NULL)
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if ((bio_err = BIO_new(BIO_s_file())) != NULL)
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BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
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if (!load_config(bio_err, NULL))
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goto end;
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/* first check the program name */
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program_name(argv[0], pname, sizeof pname);
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if (strcmp(pname, "base64") == 0)
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base64 = 1;
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cipher = EVP_get_cipherbyname(pname);
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if (!base64 && (cipher == NULL) && (strcmp(pname, "enc") != 0)) {
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BIO_printf(bio_err, "%s is an unknown cipher\n", pname);
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goto bad;
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}
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argc--;
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argv++;
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while (argc >= 1) {
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if (strcmp(*argv, "-e") == 0)
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enc = 1;
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else if (strcmp(*argv, "-in") == 0) {
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if (--argc < 1)
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goto bad;
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inf = *(++argv);
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} else if (strcmp(*argv, "-out") == 0) {
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if (--argc < 1)
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goto bad;
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outf = *(++argv);
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} else if (strcmp(*argv, "-pass") == 0) {
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if (--argc < 1)
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goto bad;
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passarg = *(++argv);
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}
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#ifndef OPENSSL_NO_ENGINE
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else if (strcmp(*argv, "-engine") == 0) {
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if (--argc < 1)
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goto bad;
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engine = *(++argv);
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}
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#endif
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else if (strcmp(*argv, "-d") == 0)
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enc = 0;
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else if (strcmp(*argv, "-p") == 0)
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printkey = 1;
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else if (strcmp(*argv, "-v") == 0)
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verbose = 1;
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else if (strcmp(*argv, "-nopad") == 0)
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nopad = 1;
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else if (strcmp(*argv, "-salt") == 0)
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nosalt = 0;
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else if (strcmp(*argv, "-nosalt") == 0)
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nosalt = 1;
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else if (strcmp(*argv, "-debug") == 0)
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debug = 1;
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else if (strcmp(*argv, "-P") == 0)
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printkey = 2;
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else if (strcmp(*argv, "-A") == 0)
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olb64 = 1;
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else if (strcmp(*argv, "-a") == 0)
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base64 = 1;
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else if (strcmp(*argv, "-base64") == 0)
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base64 = 1;
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else if (strcmp(*argv, "-bufsize") == 0) {
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if (--argc < 1)
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goto bad;
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bufsize = (unsigned char *)*(++argv);
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} else if (strcmp(*argv, "-k") == 0) {
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if (--argc < 1)
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goto bad;
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str = *(++argv);
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} else if (strcmp(*argv, "-kfile") == 0) {
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static char buf[128];
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FILE *infile;
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char *file;
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if (--argc < 1)
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goto bad;
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file = *(++argv);
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infile = fopen(file, "r");
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if (infile == NULL) {
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BIO_printf(bio_err, "unable to read key from '%s'\n", file);
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goto bad;
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}
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buf[0] = '\0';
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if (!fgets(buf, sizeof buf, infile)) {
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BIO_printf(bio_err, "unable to read key from '%s'\n", file);
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goto bad;
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}
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fclose(infile);
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i = strlen(buf);
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if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
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buf[--i] = '\0';
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if ((i > 0) && ((buf[i - 1] == '\n') || (buf[i - 1] == '\r')))
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buf[--i] = '\0';
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if (i < 1) {
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BIO_printf(bio_err, "zero length password\n");
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goto bad;
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}
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str = buf;
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} else if (strcmp(*argv, "-K") == 0) {
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if (--argc < 1)
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goto bad;
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hkey = *(++argv);
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} else if (strcmp(*argv, "-S") == 0) {
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if (--argc < 1)
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goto bad;
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hsalt = *(++argv);
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} else if (strcmp(*argv, "-iv") == 0) {
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if (--argc < 1)
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goto bad;
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hiv = *(++argv);
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} else if (strcmp(*argv, "-md") == 0) {
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if (--argc < 1)
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goto bad;
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md = *(++argv);
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} else if (strcmp(*argv, "-non-fips-allow") == 0)
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non_fips_allow = 1;
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else if ((argv[0][0] == '-') &&
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((c = EVP_get_cipherbyname(&(argv[0][1]))) != NULL)) {
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cipher = c;
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} else if (strcmp(*argv, "-none") == 0)
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cipher = NULL;
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else {
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BIO_printf(bio_err, "unknown option '%s'\n", *argv);
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bad:
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BIO_printf(bio_err, "options are\n");
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BIO_printf(bio_err, "%-14s input file\n", "-in <file>");
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BIO_printf(bio_err, "%-14s output file\n", "-out <file>");
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BIO_printf(bio_err, "%-14s pass phrase source\n", "-pass <arg>");
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BIO_printf(bio_err, "%-14s encrypt\n", "-e");
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BIO_printf(bio_err, "%-14s decrypt\n", "-d");
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BIO_printf(bio_err,
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"%-14s base64 encode/decode, depending on encryption flag\n",
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"-a/-base64");
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BIO_printf(bio_err, "%-14s passphrase is the next argument\n",
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"-k");
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BIO_printf(bio_err,
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"%-14s passphrase is the first line of the file argument\n",
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"-kfile");
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BIO_printf(bio_err,
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"%-14s the next argument is the md to use to create a key\n",
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"-md");
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BIO_printf(bio_err,
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"%-14s from a passphrase. One of md2, md5, sha or sha1\n",
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"");
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BIO_printf(bio_err, "%-14s key/iv in hex is the next argument\n",
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"-K/-iv");
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BIO_printf(bio_err, "%-14s print the iv/key (then exit if -P)\n",
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"-[pP]");
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BIO_printf(bio_err, "%-14s buffer size\n", "-bufsize <n>");
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#ifndef OPENSSL_NO_ENGINE
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BIO_printf(bio_err,
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"%-14s use engine e, possibly a hardware device.\n",
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"-engine e");
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#endif
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BIO_printf(bio_err, "Cipher Types\n");
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OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
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show_ciphers, bio_err);
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BIO_printf(bio_err, "\n");
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goto end;
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}
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argc--;
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argv++;
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}
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#ifndef OPENSSL_NO_ENGINE
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setup_engine(bio_err, engine, 0);
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#endif
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if (md && (dgst = EVP_get_digestbyname(md)) == NULL) {
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BIO_printf(bio_err, "%s is an unsupported message digest type\n", md);
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goto end;
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}
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if (dgst == NULL) {
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if (in_FIPS_mode)
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dgst = EVP_sha1();
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else
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dgst = EVP_md5();
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}
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if (bufsize != NULL) {
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unsigned long n;
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for (n = 0; *bufsize; bufsize++) {
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i = *bufsize;
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if ((i <= '9') && (i >= '0'))
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n = n * 10 + i - '0';
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else if (i == 'k') {
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n *= 1024;
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bufsize++;
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break;
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}
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}
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if (*bufsize != '\0') {
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BIO_printf(bio_err, "invalid 'bufsize' specified.\n");
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goto end;
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}
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/* It must be large enough for a base64 encoded line */
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if (base64 && n < 80)
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n = 80;
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bsize = (int)n;
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if (verbose)
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BIO_printf(bio_err, "bufsize=%d\n", bsize);
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}
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strbuf = OPENSSL_malloc(SIZE);
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buff = (unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
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if ((buff == NULL) || (strbuf == NULL)) {
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BIO_printf(bio_err, "OPENSSL_malloc failure %ld\n",
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(long)EVP_ENCODE_LENGTH(bsize));
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goto end;
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}
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in = BIO_new(BIO_s_file());
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out = BIO_new(BIO_s_file());
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if ((in == NULL) || (out == NULL)) {
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ERR_print_errors(bio_err);
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goto end;
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}
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if (debug) {
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BIO_set_callback(in, BIO_debug_callback);
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BIO_set_callback(out, BIO_debug_callback);
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BIO_set_callback_arg(in, (char *)bio_err);
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BIO_set_callback_arg(out, (char *)bio_err);
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}
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if (inf == NULL) {
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if (bufsize != NULL)
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setvbuf(stdin, (char *)NULL, _IONBF, 0);
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BIO_set_fp(in, stdin, BIO_NOCLOSE);
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} else {
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if (BIO_read_filename(in, inf) <= 0) {
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perror(inf);
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goto end;
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}
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}
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if (!str && passarg) {
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if (!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
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BIO_printf(bio_err, "Error getting password\n");
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goto end;
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}
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str = pass;
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}
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if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
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for (;;) {
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char buf[200];
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BIO_snprintf(buf, sizeof buf, "enter %s %s password:",
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OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
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(enc) ? "encryption" : "decryption");
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strbuf[0] = '\0';
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i = EVP_read_pw_string((char *)strbuf, SIZE, buf, enc);
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if (i == 0) {
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if (strbuf[0] == '\0') {
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ret = 1;
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goto end;
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}
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str = strbuf;
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break;
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}
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if (i < 0) {
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BIO_printf(bio_err, "bad password read\n");
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goto end;
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}
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}
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}
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if (outf == NULL) {
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BIO_set_fp(out, stdout, BIO_NOCLOSE);
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if (bufsize != NULL)
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setvbuf(stdout, (char *)NULL, _IONBF, 0);
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#ifdef OPENSSL_SYS_VMS
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{
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BIO *tmpbio = BIO_new(BIO_f_linebuffer());
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out = BIO_push(tmpbio, out);
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}
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#endif
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} else {
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if (BIO_write_filename(out, outf) <= 0) {
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perror(outf);
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goto end;
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}
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}
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rbio = in;
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wbio = out;
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if (base64) {
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if ((b64 = BIO_new(BIO_f_base64())) == NULL)
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goto end;
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if (debug) {
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BIO_set_callback(b64, BIO_debug_callback);
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BIO_set_callback_arg(b64, (char *)bio_err);
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}
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if (olb64)
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BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
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if (enc)
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wbio = BIO_push(b64, wbio);
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else
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rbio = BIO_push(b64, rbio);
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}
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if (cipher != NULL) {
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/*
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* Note that str is NULL if a key was passed on the command line, so
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* we get no salt in that case. Is this a bug?
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*/
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if (str != NULL) {
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/*
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* Salt handling: if encrypting generate a salt and write to
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* output BIO. If decrypting read salt from input BIO.
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*/
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unsigned char *sptr;
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if (nosalt)
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sptr = NULL;
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else {
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if (enc) {
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if (hsalt) {
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if (!set_hex(hsalt, salt, sizeof salt)) {
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BIO_printf(bio_err, "invalid hex salt value\n");
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goto end;
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}
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} else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
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goto end;
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/*
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* If -P option then don't bother writing
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*/
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if ((printkey != 2)
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&& (BIO_write(wbio, magic,
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sizeof magic - 1) != sizeof magic - 1
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|| BIO_write(wbio,
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(char *)salt,
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sizeof salt) != sizeof salt)) {
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BIO_printf(bio_err, "error writing output file\n");
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goto end;
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}
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} else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
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|| BIO_read(rbio,
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(unsigned char *)salt,
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sizeof salt) != sizeof salt) {
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BIO_printf(bio_err, "error reading input file\n");
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goto end;
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} else if (memcmp(mbuf, magic, sizeof magic - 1)) {
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BIO_printf(bio_err, "bad magic number\n");
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goto end;
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}
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sptr = salt;
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}
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EVP_BytesToKey(cipher, dgst, sptr,
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(unsigned char *)str, strlen(str), 1, key, iv);
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/*
|
|
* 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) && !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, sizeof key)) {
|
|
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);
|
|
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);
|
|
}
|