644 lines
21 KiB
C
644 lines
21 KiB
C
/* 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 <limits.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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#ifndef OPENSSL_NO_COMP
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# include <openssl/comp.h>
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#endif
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#include <ctype.h>
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#undef SIZE
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#undef BSIZE
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#define SIZE (512)
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#define BSIZE (8*1024)
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static int set_hex(char *in, unsigned char *out, int size);
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static void show_ciphers(const OBJ_NAME *name, void *bio_);
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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
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OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
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OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
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OPT_UPPER_S, OPT_IV, OPT_MD, OPT_CIPHER
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} OPTION_CHOICE;
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OPTIONS enc_options[] = {
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{"help", OPT_HELP, '-', "Display this summary"},
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{"in", OPT_IN, '<', "Input file"},
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{"out", OPT_OUT, '>', "Output file"},
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{"pass", OPT_PASS, 's', "Passphrase source"},
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{"e", OPT_E, '-', "Encrypt"},
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{"d", OPT_D, '-', "Decrypt"},
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{"p", OPT_P, '-', "Print the iv/key"},
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{"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
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{"v", OPT_V, '-', "Verbose output"},
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{"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
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{"salt", OPT_SALT, '-', "Use salt in the KDF (default)"},
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{"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"},
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{"debug", OPT_DEBUG, '-', "Print debug info"},
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{"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"},
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{"base64", OPT_A, '-', "Same as option -a"},
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{"A", OPT_UPPER_A, '-',
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"Used with -[base64|a] to specify base64 buffer as a single line"},
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{"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
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{"k", OPT_K, 's', "Passphrase"},
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{"kfile", OPT_KFILE, '<', "Fead passphrase from file"},
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{"K", OPT_UPPER_K, 's', "Raw key, in hex"},
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{"S", OPT_UPPER_S, 's', "Salt, in hex"},
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{"iv", OPT_IV, 's', "IV in hex"},
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{"md", OPT_MD, 's', "Use specified digest to create key from passphrase"},
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{"none", OPT_NONE, '-', "Don't encrypt"},
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{"", OPT_CIPHER, '-', "Any supported cipher"},
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#ifdef ZLIB
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{"z", OPT_Z, '-', "Use zlib as the 'encryption'"},
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#endif
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#ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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#endif
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{NULL}
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};
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int enc_main(int argc, char **argv)
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{
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static char buf[128];
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static const char magic[] = "Salted__";
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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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EVP_CIPHER_CTX *ctx = NULL;
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const EVP_CIPHER *cipher = NULL, *c;
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const EVP_MD *dgst = NULL;
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char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
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char *infile = NULL, *outfile = NULL, *prog;
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char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
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char mbuf[sizeof magic - 1];
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OPTION_CHOICE o;
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int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
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int enc = 1, printkey = 0, i, k;
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int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
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int ret = 1, inl, nopad = 0;
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unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
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unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
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long n;
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#ifdef ZLIB
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int do_zlib = 0;
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BIO *bzl = NULL;
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#endif
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/* first check the program name */
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prog = opt_progname(argv[0]);
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if (strcmp(prog, "base64") == 0)
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base64 = 1;
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#ifdef ZLIB
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else if (strcmp(prog, "zlib") == 0)
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do_zlib = 1;
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#endif
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else {
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cipher = EVP_get_cipherbyname(prog);
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if (cipher == NULL && strcmp(prog, "enc") != 0) {
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BIO_printf(bio_err, "%s is not a known cipher\n", prog);
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goto end;
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}
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}
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prog = opt_init(argc, argv, enc_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(enc_options);
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ret = 0;
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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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case OPT_E:
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enc = 1;
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break;
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case OPT_IN:
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infile = opt_arg();
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break;
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case OPT_OUT:
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outfile = opt_arg();
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break;
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case OPT_PASS:
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passarg = opt_arg();
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break;
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case OPT_ENGINE:
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(void)setup_engine(opt_arg(), 0);
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break;
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case OPT_D:
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enc = 0;
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break;
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case OPT_P:
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printkey = 1;
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break;
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case OPT_V:
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verbose = 1;
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break;
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case OPT_NOPAD:
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nopad = 1;
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break;
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case OPT_SALT:
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nosalt = 0;
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break;
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case OPT_NOSALT:
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nosalt = 1;
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break;
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case OPT_DEBUG:
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debug = 1;
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break;
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case OPT_UPPER_P:
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printkey = 2;
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break;
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case OPT_UPPER_A:
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olb64 = 1;
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break;
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case OPT_A:
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base64 = 1;
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break;
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case OPT_Z:
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#ifdef ZLIB
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do_zlib = 1;
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#endif
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break;
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case OPT_BUFSIZE:
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p = opt_arg();
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i = (int)strlen(p) - 1;
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k = i >= 1 && p[i] == 'k';
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if (k)
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p[i] = '\0';
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if (!opt_long(opt_arg(), &n)
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|| n < 0 || (k && n >= LONG_MAX / 1024))
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goto opthelp;
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if (k)
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n *= 1024;
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bsize = (int)n;
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break;
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case OPT_K:
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str = opt_arg();
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break;
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case OPT_KFILE:
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in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
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if (in == NULL)
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goto opthelp;
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i = BIO_gets(in, buf, sizeof buf);
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BIO_free(in);
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in = NULL;
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if (i <= 0) {
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BIO_printf(bio_err,
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"%s Can't read key from %s\n", prog, opt_arg());
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goto opthelp;
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}
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while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
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buf[i] = '\0';
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if (i <= 0) {
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BIO_printf(bio_err, "%s: zero length password\n", prog);
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goto opthelp;
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}
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str = buf;
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break;
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case OPT_UPPER_K:
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hkey = opt_arg();
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break;
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case OPT_UPPER_S:
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hsalt = opt_arg();
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break;
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case OPT_IV:
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hiv = opt_arg();
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break;
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case OPT_MD:
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if (!opt_md(opt_arg(), &dgst))
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goto opthelp;
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break;
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case OPT_CIPHER:
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if (!opt_cipher(opt_unknown(), &c))
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goto opthelp;
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cipher = c;
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break;
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case OPT_NONE:
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cipher = NULL;
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break;
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}
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}
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if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
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BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);
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goto end;
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}
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if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) {
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BIO_printf(bio_err, "%s XTS ciphers not supported\n", prog);
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goto end;
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}
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if (dgst == NULL)
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dgst = EVP_sha256();
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/* It must be large enough for a base64 encoded line */
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if (base64 && bsize < 80)
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bsize = 80;
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if (verbose)
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BIO_printf(bio_err, "bufsize=%d\n", bsize);
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#ifdef ZLIB
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if (!do_zlib)
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#endif
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if (base64) {
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if (enc)
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outformat = FORMAT_BASE64;
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else
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informat = FORMAT_BASE64;
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}
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strbuf = app_malloc(SIZE, "strbuf");
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buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
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if (infile == NULL) {
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unbuffer(stdin);
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in = dup_bio_in(informat);
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} else
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in = bio_open_default(infile, 'r', informat);
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if (in == NULL)
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goto end;
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if (!str && passarg) {
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if (!app_passwd(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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if (1) {
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#ifndef OPENSSL_NO_UI
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for (;;) {
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char prompt[200];
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BIO_snprintf(prompt, sizeof prompt, "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, prompt, 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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} else {
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#endif
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BIO_printf(bio_err, "password required\n");
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goto end;
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}
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}
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out = bio_open_default(outfile, 'w', outformat);
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if (out == NULL)
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goto end;
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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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rbio = in;
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wbio = out;
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#ifdef ZLIB
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if (do_zlib) {
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if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
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goto end;
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if (debug) {
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BIO_set_callback(bzl, BIO_debug_callback);
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BIO_set_callback_arg(bzl, (char *)bio_err);
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}
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if (enc)
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wbio = BIO_push(bzl, wbio);
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else
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rbio = BIO_push(bzl, rbio);
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}
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#endif
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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_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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if (!EVP_BytesToKey(cipher, dgst, sptr,
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(unsigned char *)str,
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strlen(str), 1, key, iv)) {
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BIO_printf(bio_err, "EVP_BytesToKey failed\n");
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goto end;
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}
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/*
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* zero the complete buffer or the string passed from the command
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* line bug picked up by Larry J. Hughes Jr. <hughes@indiana.edu>
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*/
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if (str == strbuf)
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OPENSSL_cleanse(str, SIZE);
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else
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OPENSSL_cleanse(str, strlen(str));
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}
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if (hiv != NULL) {
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int siz = EVP_CIPHER_iv_length(cipher);
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if (siz == 0) {
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BIO_printf(bio_err, "warning: iv not use by this cipher\n");
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} else if (!set_hex(hiv, iv, sizeof iv)) {
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BIO_printf(bio_err, "invalid hex iv value\n");
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goto end;
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}
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}
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if ((hiv == NULL) && (str == NULL)
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&& EVP_CIPHER_iv_length(cipher) != 0) {
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/*
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* 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 (!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 (EVP_CIPHER_key_length(cipher) > 0) {
|
|
printf("key=");
|
|
for (i = 0; i < EVP_CIPHER_key_length(cipher); i++)
|
|
printf("%02X", key[i]);
|
|
printf("\n");
|
|
}
|
|
if (EVP_CIPHER_iv_length(cipher) > 0) {
|
|
printf("iv =");
|
|
for (i = 0; i < EVP_CIPHER_iv_length(cipher); 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 :%8"PRIu64"\n", BIO_number_read(in));
|
|
BIO_printf(bio_err, "bytes written:%8"PRIu64"\n", BIO_number_written(out));
|
|
}
|
|
end:
|
|
ERR_print_errors(bio_err);
|
|
OPENSSL_free(strbuf);
|
|
OPENSSL_free(buff);
|
|
BIO_free(in);
|
|
BIO_free_all(out);
|
|
BIO_free(benc);
|
|
BIO_free(b64);
|
|
#ifdef ZLIB
|
|
BIO_free(bzl);
|
|
#endif
|
|
OPENSSL_free(pass);
|
|
return (ret);
|
|
}
|
|
|
|
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, " ");
|
|
}
|
|
|
|
static 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 (!isxdigit(j)) {
|
|
BIO_printf(bio_err, "non-hex digit\n");
|
|
return (0);
|
|
}
|
|
j = (unsigned char)OPENSSL_hexchar2int(j);
|
|
if (i & 1)
|
|
out[i / 2] |= j;
|
|
else
|
|
out[i / 2] = (j << 4);
|
|
}
|
|
return (1);
|
|
}
|