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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/openssl/enc.c	Lines:	0	266	0.0 %
Date:	2016-12-06	Branches:	0	202	0.0 %


/* $OpenBSD: enc.c,v 1.11 2016/04/07 20:02:19 jmc Exp $ */
/* 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 <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "apps.h"

#include <openssl/bio.h>
#include <openssl/comp.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/pem.h>
#include <openssl/x509.h>

int set_hex(char *in, unsigned char *out, int size);

#define SIZE	(512)
#define BSIZE	(8*1024)

static struct {
	int base64;
	char *bufsize;
	const EVP_CIPHER *cipher;
	int debug;
#ifdef ZLIB
	int do_zlib;
#endif
	int enc;
	char *hiv;
	char *hkey;
	char *hsalt;
	char *inf;
	char *keyfile;
	char *keystr;
	char *md;
	int nopad;
	int nosalt;
	int olb64;
	char *outf;
	char *passarg;
	int printkey;
	int verbose;
} enc_config;

static int
enc_opt_cipher(int argc, char **argv, int *argsused)
{
	char *name = argv[0];

	if (*name++ != '-')
		return (1);

	if (strcmp(name, "none") == 0) {
		enc_config.cipher = NULL;
		*argsused = 1;
		return (0);
	}

	if ((enc_config.cipher = EVP_get_cipherbyname(name)) != NULL) {
		*argsused = 1;
		return (0);
	}

	return (1);
}

static struct option enc_options[] = {
	{
		.name = "A",
		.desc = "Process base64 data on one line (requires -a)",
		.type = OPTION_FLAG,
		.opt.flag = &enc_config.olb64,
	},
	{
		.name = "a",
		.desc = "Perform base64 encoding/decoding (alias -base64)",
		.type = OPTION_FLAG,
		.opt.flag = &enc_config.base64,
	},
	{
		.name = "base64",
		.type = OPTION_FLAG,
		.opt.flag = &enc_config.base64,
	},
	{
		.name = "bufsize",
		.argname = "size",
		.desc = "Specify the buffer size to use for I/O",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.bufsize,
	},
	{
		.name = "d",
		.desc = "Decrypt the input data",
		.type = OPTION_VALUE,
		.opt.value = &enc_config.enc,
		.value = 0,
	},
	{
		.name = "debug",
		.desc = "Print debugging information",
		.type = OPTION_FLAG,
		.opt.flag = &enc_config.debug,
	},
	{
		.name = "e",
		.desc = "Encrypt the input data (default)",
		.type = OPTION_VALUE,
		.opt.value = &enc_config.enc,
		.value = 1,
	},
	{
		.name = "in",
		.argname = "file",
		.desc = "Input file to read from (default stdin)",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.inf,
	},
	{
		.name = "iv",
		.argname = "IV",
		.desc = "IV to use, specified as a hexadecimal string",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.hiv,
	},
	{
		.name = "K",
		.argname = "key",
		.desc = "Key to use, specified as a hexadecimal string",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.hkey,
	},
	{
		.name = "k",		/* Superseded by -pass. */
		.type = OPTION_ARG,
		.opt.arg = &enc_config.keystr,
	},
	{
		.name = "kfile",	/* Superseded by -pass. */
		.type = OPTION_ARG,
		.opt.arg = &enc_config.keyfile,
	},
	{
		.name = "md",
		.argname = "digest",
		.desc = "Digest to use to create a key from the passphrase",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.md,
	},
	{
		.name = "none",
		.desc = "Use NULL cipher (no encryption or decryption)",
		.type = OPTION_ARGV_FUNC,
		.opt.argvfunc = enc_opt_cipher,
	},
	{
		.name = "nopad",
		.desc = "Disable standard block padding",
		.type = OPTION_FLAG,
		.opt.flag = &enc_config.nopad,
	},
	{
		.name = "nosalt",
		.type = OPTION_VALUE,
		.opt.value = &enc_config.nosalt,
		.value = 1,
	},
	{
		.name = "out",
		.argname = "file",
		.desc = "Output file to write to (default stdout)",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.outf,
	},
	{
		.name = "P",
		.desc = "Print out the salt, key and IV used, then exit\n"
		    "  (no encryption or decryption is performed)",
		.type = OPTION_VALUE,
		.opt.value = &enc_config.printkey,
		.value = 2,
	},
	{
		.name = "p",
		.desc = "Print out the salt, key and IV used",
		.type = OPTION_VALUE,
		.opt.value = &enc_config.printkey,
		.value = 1,
	},
	{
		.name = "pass",
		.argname = "source",
		.desc = "Password source",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.passarg,
	},
	{
		.name = "S",
		.argname = "salt",
		.desc = "Salt to use, specified as a hexadecimal string",
		.type = OPTION_ARG,
		.opt.arg = &enc_config.hsalt,
	},
	{
		.name = "salt",
		.desc = "Use a salt in the key derivation routines (default)",
		.type = OPTION_VALUE,
		.opt.value = &enc_config.nosalt,
		.value = 0,
	},
	{
		.name = "v",
		.desc = "Verbose",
		.type = OPTION_FLAG,
		.opt.flag = &enc_config.verbose,
	},
#ifdef ZLIB
	{
		.name = "z",
		.desc = "Perform zlib compression/decompression",
		.type = OPTION_FLAG,
		.opt.flag = &enc_config.do_zlib,
	},
#endif
	{
		.name = NULL,
		.type = OPTION_ARGV_FUNC,
		.opt.argvfunc = enc_opt_cipher,
	},
	{ NULL },
};

static void
show_ciphers(const OBJ_NAME *name, void *arg)
{
	static int n;

	if (!islower((unsigned char)*name->name))
		return;

	fprintf(stderr, " -%-24s%s", name->name, (++n % 3 ? "" : "\n"));
}

static void
enc_usage(void)
{
	fprintf(stderr, "usage: enc -ciphername [-AadePp] [-base64] "
	    "[-bufsize number] [-debug]\n"
	    "    [-in file] [-iv IV] [-K key] [-k password]\n"
	    "    [-kfile file] [-md digest] [-none] [-nopad] [-nosalt]\n"
	    "    [-out file] [-pass arg] [-S salt] [-salt]\n\n");
	options_usage(enc_options);
	fprintf(stderr, "\n");

	fprintf(stderr, "Valid ciphername values:\n\n");
	OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_ciphers, NULL);
	fprintf(stderr, "\n");
}

int
enc_main(int argc, char **argv)
{
	static const char magic[] = "Salted__";
	char mbuf[sizeof magic - 1];
	char *strbuf = NULL, *pass = NULL;
	unsigned char *buff = NULL;
	int bsize = BSIZE;
	int ret = 1, inl;
	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
	unsigned char salt[PKCS5_SALT_LEN];
#ifdef ZLIB
	BIO *bzl = NULL;
#endif
	EVP_CIPHER_CTX *ctx = NULL;
	const EVP_MD *dgst = NULL;
	BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL;
	BIO *rbio = NULL, *wbio = NULL;
#define PROG_NAME_SIZE  39
	char pname[PROG_NAME_SIZE + 1];
	int i;

	if (single_execution) {
		if (pledge("stdio rpath wpath cpath tty", NULL) == -1) {
			perror("pledge");
			exit(1);
		}
	}

	memset(&enc_config, 0, sizeof(enc_config));
	enc_config.enc = 1;

	/* first check the program name */
	program_name(argv[0], pname, sizeof(pname));

	if (strcmp(pname, "base64") == 0)
		enc_config.base64 = 1;

#ifdef ZLIB
	if (strcmp(pname, "zlib") == 0)
		enc_config.do_zlib = 1;
#endif

	enc_config.cipher = EVP_get_cipherbyname(pname);

#ifdef ZLIB
	if (!enc_config.do_zlib && !enc_config.base64 &&
	    enc_config.cipher == NULL && strcmp(pname, "enc") != 0)
#else
	if (!enc_config.base64 && enc_config.cipher == NULL &&
	    strcmp(pname, "enc") != 0)
#endif
	{
		BIO_printf(bio_err, "%s is an unknown cipher\n", pname);
		goto end;
	}

	if (options_parse(argc, argv, enc_options, NULL, NULL) != 0) {
		enc_usage();
		goto end;
	}

	if (enc_config.keyfile != NULL) {
		static char buf[128];
		FILE *infile;

		infile = fopen(enc_config.keyfile, "r");
		if (infile == NULL) {
			BIO_printf(bio_err, "unable to read key from '%s'\n",
			    enc_config.keyfile);
			goto end;
		}
		buf[0] = '\0';
		if (!fgets(buf, sizeof buf, infile)) {
			BIO_printf(bio_err, "unable to read key from '%s'\n",
			    enc_config.keyfile);
			fclose(infile);
			goto end;
		}
		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 end;
		}
		enc_config.keystr = buf;
	}

	if (enc_config.md != NULL &&
	    (dgst = EVP_get_digestbyname(enc_config.md)) == NULL) {
		BIO_printf(bio_err,
		    "%s is an unsupported message digest type\n",
		    enc_config.md);
		goto end;
	}
	if (dgst == NULL) {
		dgst = EVP_md5();	/* XXX */
	}

	if (enc_config.bufsize != NULL) {
		char *p = enc_config.bufsize;
		unsigned long n;

		/* XXX - provide an OPTION_ARG_DISKUNIT. */
		for (n = 0; *p != '\0'; p++) {
			i = *p;
			if ((i <= '9') && (i >= '0'))
				n = n * 10 + i - '0';
			else if (i == 'k') {
				n *= 1024;
				p++;
				break;
			}
		}
		if (*p != '\0') {
			BIO_printf(bio_err, "invalid 'bufsize' specified.\n");
			goto end;
		}
		/* It must be large enough for a base64 encoded line. */
		if (enc_config.base64 && n < 80)
			n = 80;

		bsize = (int)n;
		if (enc_config.verbose)
			BIO_printf(bio_err, "bufsize=%d\n", bsize);
	}
	strbuf = malloc(SIZE);
	buff = malloc(EVP_ENCODE_LENGTH(bsize));
	if ((buff == NULL) || (strbuf == NULL)) {
		BIO_printf(bio_err, "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 (enc_config.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 (enc_config.inf == NULL) {
		if (enc_config.bufsize != NULL)
			setvbuf(stdin, (char *) NULL, _IONBF, 0);
		BIO_set_fp(in, stdin, BIO_NOCLOSE);
	} else {
		if (BIO_read_filename(in, enc_config.inf) <= 0) {
			perror(enc_config.inf);
			goto end;
		}
	}

	if (!enc_config.keystr && enc_config.passarg) {
		if (!app_passwd(bio_err, enc_config.passarg, NULL,
		    &pass, NULL)) {
			BIO_printf(bio_err, "Error getting password\n");
			goto end;
		}
		enc_config.keystr = pass;
	}
	if (enc_config.keystr == NULL && enc_config.cipher != NULL &&
	    enc_config.hkey == NULL) {
		for (;;) {
			char buf[200];
			int retval;

			retval = snprintf(buf, sizeof buf,
			    "enter %s %s password:",
			    OBJ_nid2ln(EVP_CIPHER_nid(enc_config.cipher)),
			    enc_config.enc ? "encryption" : "decryption");
			if ((size_t)retval >= sizeof buf) {
				BIO_printf(bio_err,
				    "Password prompt too long\n");
				goto end;
			}
			strbuf[0] = '\0';
			i = EVP_read_pw_string((char *)strbuf, SIZE, buf,
			    enc_config.enc);
			if (i == 0) {
				if (strbuf[0] == '\0') {
					ret = 1;
					goto end;
				}
				enc_config.keystr = strbuf;
				break;
			}
			if (i < 0) {
				BIO_printf(bio_err, "bad password read\n");
				goto end;
			}
		}
	}
	if (enc_config.outf == NULL) {
		BIO_set_fp(out, stdout, BIO_NOCLOSE);
		if (enc_config.bufsize != NULL)
			setvbuf(stdout, (char *)NULL, _IONBF, 0);
	} else {
		if (BIO_write_filename(out, enc_config.outf) <= 0) {
			perror(enc_config.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 (enc_config.base64) {
		if ((b64 = BIO_new(BIO_f_base64())) == NULL)
			goto end;
		if (enc_config.debug) {
			BIO_set_callback(b64, BIO_debug_callback);
			BIO_set_callback_arg(b64, (char *) bio_err);
		}
		if (enc_config.olb64)
			BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
		if (enc_config.enc)
			wbio = BIO_push(b64, wbio);
		else
			rbio = BIO_push(b64, rbio);
	}
	if (enc_config.cipher != NULL) {
		/*
		 * Note that keystr is NULL if a key was passed on the command
		 * line, so we get no salt in that case. Is this a bug?
		 */
		if (enc_config.keystr != NULL) {
			/*
			 * Salt handling: if encrypting generate a salt and
			 * write to output BIO. If decrypting read salt from
			 * input BIO.
			 */
			unsigned char *sptr;
			if (enc_config.nosalt)
				sptr = NULL;
			else {
				if (enc_config.enc) {
					if (enc_config.hsalt) {
						if (!set_hex(enc_config.hsalt, salt, sizeof salt)) {
							BIO_printf(bio_err,
							    "invalid hex salt value\n");
							goto end;
						}
					} else
						arc4random_buf(salt,
						    sizeof(salt));
					/*
					 * If -P option then don't bother
					 * writing
					 */
					if ((enc_config.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(enc_config.cipher, dgst, sptr,
			    (unsigned char *)enc_config.keystr,
			    strlen(enc_config.keystr), 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 (enc_config.keystr == strbuf)
				explicit_bzero(enc_config.keystr, SIZE);
			else
				explicit_bzero(enc_config.keystr,
				    strlen(enc_config.keystr));
		}
		if (enc_config.hiv != NULL &&
		    !set_hex(enc_config.hiv, iv, sizeof iv)) {
			BIO_printf(bio_err, "invalid hex iv value\n");
			goto end;
		}
		if (enc_config.hiv == NULL && enc_config.keystr == NULL &&
		    EVP_CIPHER_iv_length(enc_config.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 (enc_config.hkey != NULL &&
		    !set_hex(enc_config.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 (!EVP_CipherInit_ex(ctx, enc_config.cipher, NULL, NULL,
		    NULL, enc_config.enc)) {
			BIO_printf(bio_err, "Error setting cipher %s\n",
			    EVP_CIPHER_name(enc_config.cipher));
			ERR_print_errors(bio_err);
			goto end;
		}
		if (enc_config.nopad)
			EVP_CIPHER_CTX_set_padding(ctx, 0);

		if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv,
		    enc_config.enc)) {
			BIO_printf(bio_err, "Error setting cipher %s\n",
			    EVP_CIPHER_name(enc_config.cipher));
			ERR_print_errors(bio_err);
			goto end;
		}
		if (enc_config.debug) {
			BIO_set_callback(benc, BIO_debug_callback);
			BIO_set_callback_arg(benc, (char *) bio_err);
		}
		if (enc_config.printkey) {
			if (!enc_config.nosalt) {
				printf("salt=");
				for (i = 0; i < (int) sizeof(salt); i++)
					printf("%02X", salt[i]);
				printf("\n");
			}
			if (enc_config.cipher->key_len > 0) {
				printf("key=");
				for (i = 0; i < enc_config.cipher->key_len; i++)
					printf("%02X", key[i]);
				printf("\n");
			}
			if (enc_config.cipher->iv_len > 0) {
				printf("iv =");
				for (i = 0; i < enc_config.cipher->iv_len; i++)
					printf("%02X", iv[i]);
				printf("\n");
			}
			if (enc_config.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 (enc_config.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);
	free(strbuf);
	free(buff);
	BIO_free(in);
	if (out != NULL)
		BIO_free_all(out);
	BIO_free(benc);
	BIO_free(b64);
#ifdef ZLIB
	BIO_free(bzl);
#endif
	free(pass);

	return (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);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: enc.c,v 1.11 2016/04/07 20:02:19 jmc Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <ctype.h>
60			#include <stdio.h>
61			#include <stdlib.h>
62			#include <string.h>
63
64			#include "apps.h"
65
66			#include <openssl/bio.h>
67			#include <openssl/comp.h>
68			#include <openssl/err.h>
69			#include <openssl/evp.h>
70			#include <openssl/objects.h>
71			#include <openssl/pem.h>
72			#include <openssl/x509.h>
73
74			int set_hex(char in, unsigned char out, int size);
75
76			#define SIZE (512)
77			#define BSIZE (8*1024)
78
79			static struct {
80			int base64;
81			char *bufsize;
82			const EVP_CIPHER *cipher;
83			int debug;
84			#ifdef ZLIB
85			int do_zlib;
86			#endif
87			int enc;
88			char *hiv;
89			char *hkey;
90			char *hsalt;
91			char *inf;
92			char *keyfile;
93			char *keystr;
94			char *md;
95			int nopad;
96			int nosalt;
97			int olb64;
98			char *outf;
99			char *passarg;
100			int printkey;
101			int verbose;
102			} enc_config;
103
104			static int
105			enc_opt_cipher(int argc, char *argv, int argsused)
106			{
107			char *name = argv[0];
108
109			if (*name++ != '-')
110			return (1);
111
112			if (strcmp(name, "none") == 0) {
113			enc_config.cipher = NULL;
114			*argsused = 1;
115			return (0);
116			}
117
118			if ((enc_config.cipher = EVP_get_cipherbyname(name)) != NULL) {
119			*argsused = 1;
120			return (0);
121			}
122
123			return (1);
124			}
125
126			static struct option enc_options[] = {
127			{
128			.name = "A",
129			.desc = "Process base64 data on one line (requires -a)",
130			.type = OPTION_FLAG,
131			.opt.flag = &enc_config.olb64,
132			},
133			{
134			.name = "a",
135			.desc = "Perform base64 encoding/decoding (alias -base64)",
136			.type = OPTION_FLAG,
137			.opt.flag = &enc_config.base64,
138			},
139			{
140			.name = "base64",
141			.type = OPTION_FLAG,
142			.opt.flag = &enc_config.base64,
143			},
144			{
145			.name = "bufsize",
146			.argname = "size",
147			.desc = "Specify the buffer size to use for I/O",
148			.type = OPTION_ARG,
149			.opt.arg = &enc_config.bufsize,
150			},
151			{
152			.name = "d",
153			.desc = "Decrypt the input data",
154			.type = OPTION_VALUE,
155			.opt.value = &enc_config.enc,
156			.value = 0,
157			},
158			{
159			.name = "debug",
160			.desc = "Print debugging information",
161			.type = OPTION_FLAG,
162			.opt.flag = &enc_config.debug,
163			},
164			{
165			.name = "e",
166			.desc = "Encrypt the input data (default)",
167			.type = OPTION_VALUE,
168			.opt.value = &enc_config.enc,
169			.value = 1,
170			},
171			{
172			.name = "in",
173			.argname = "file",
174			.desc = "Input file to read from (default stdin)",
175			.type = OPTION_ARG,
176			.opt.arg = &enc_config.inf,
177			},
178			{
179			.name = "iv",
180			.argname = "IV",
181			.desc = "IV to use, specified as a hexadecimal string",
182			.type = OPTION_ARG,
183			.opt.arg = &enc_config.hiv,
184			},
185			{
186			.name = "K",
187			.argname = "key",
188			.desc = "Key to use, specified as a hexadecimal string",
189			.type = OPTION_ARG,
190			.opt.arg = &enc_config.hkey,
191			},
192			{
193			.name = "k", /* Superseded by -pass. */
194			.type = OPTION_ARG,
195			.opt.arg = &enc_config.keystr,
196			},
197			{
198			.name = "kfile", /* Superseded by -pass. */
199			.type = OPTION_ARG,
200			.opt.arg = &enc_config.keyfile,
201			},
202			{
203			.name = "md",
204			.argname = "digest",
205			.desc = "Digest to use to create a key from the passphrase",
206			.type = OPTION_ARG,
207			.opt.arg = &enc_config.md,
208			},
209			{
210			.name = "none",
211			.desc = "Use NULL cipher (no encryption or decryption)",
212			.type = OPTION_ARGV_FUNC,
213			.opt.argvfunc = enc_opt_cipher,
214			},
215			{
216			.name = "nopad",
217			.desc = "Disable standard block padding",
218			.type = OPTION_FLAG,
219			.opt.flag = &enc_config.nopad,
220			},
221			{
222			.name = "nosalt",
223			.type = OPTION_VALUE,
224			.opt.value = &enc_config.nosalt,
225			.value = 1,
226			},
227			{
228			.name = "out",
229			.argname = "file",
230			.desc = "Output file to write to (default stdout)",
231			.type = OPTION_ARG,
232			.opt.arg = &enc_config.outf,
233			},
234			{
235			.name = "P",
236			.desc = "Print out the salt, key and IV used, then exit\n"
237			" (no encryption or decryption is performed)",
238			.type = OPTION_VALUE,
239			.opt.value = &enc_config.printkey,
240			.value = 2,
241			},
242			{
243			.name = "p",
244			.desc = "Print out the salt, key and IV used",
245			.type = OPTION_VALUE,
246			.opt.value = &enc_config.printkey,
247			.value = 1,
248			},
249			{
250			.name = "pass",
251			.argname = "source",
252			.desc = "Password source",
253			.type = OPTION_ARG,
254			.opt.arg = &enc_config.passarg,
255			},
256			{
257			.name = "S",
258			.argname = "salt",
259			.desc = "Salt to use, specified as a hexadecimal string",
260			.type = OPTION_ARG,
261			.opt.arg = &enc_config.hsalt,
262			},
263			{
264			.name = "salt",
265			.desc = "Use a salt in the key derivation routines (default)",
266			.type = OPTION_VALUE,
267			.opt.value = &enc_config.nosalt,
268			.value = 0,
269			},
270			{
271			.name = "v",
272			.desc = "Verbose",
273			.type = OPTION_FLAG,
274			.opt.flag = &enc_config.verbose,
275			},
276			#ifdef ZLIB
277			{
278			.name = "z",
279			.desc = "Perform zlib compression/decompression",
280			.type = OPTION_FLAG,
281			.opt.flag = &enc_config.do_zlib,
282			},
283			#endif
284			{
285			.name = NULL,
286			.type = OPTION_ARGV_FUNC,
287			.opt.argvfunc = enc_opt_cipher,
288			},
289			{ NULL },
290			};
291
292			static void
293			show_ciphers(const OBJ_NAME name, void arg)
294			{
295			static int n;
296
297			if (!islower((unsigned char)*name->name))
298			return;
299
300			fprintf(stderr, " -%-24s%s", name->name, (++n % 3 ? "" : "\n"));
301			}
302
303			static void
304			enc_usage(void)
305			{
306			fprintf(stderr, "usage: enc -ciphername [-AadePp] [-base64] "
307			"[-bufsize number] [-debug]\n"
308			" [-in file] [-iv IV] [-K key] [-k password]\n"
309			" [-kfile file] [-md digest] [-none] [-nopad] [-nosalt]\n"
310			" [-out file] [-pass arg] [-S salt] [-salt]\n\n");
311			options_usage(enc_options);
312			fprintf(stderr, "\n");
313
314			fprintf(stderr, "Valid ciphername values:\n\n");
315			OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_ciphers, NULL);
316			fprintf(stderr, "\n");
317			}
318
319			int
320			enc_main(int argc, char **argv)
321			{
322			static const char magic[] = "Salted__";
323			char mbuf[sizeof magic - 1];
324			char strbuf = NULL, pass = NULL;
325			unsigned char *buff = NULL;
326			int bsize = BSIZE;
327			int ret = 1, inl;
328			unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
329			unsigned char salt[PKCS5_SALT_LEN];
330			#ifdef ZLIB
331			BIO *bzl = NULL;
332			#endif
333			EVP_CIPHER_CTX *ctx = NULL;
334			const EVP_MD *dgst = NULL;
335			BIO in = NULL, out = NULL, b64 = NULL, benc = NULL;
336			BIO rbio = NULL, wbio = NULL;
337			#define PROG_NAME_SIZE 39
338			char pname[PROG_NAME_SIZE + 1];
339			int i;
340
341			if (single_execution) {
342			if (pledge("stdio rpath wpath cpath tty", NULL) == -1) {
343			perror("pledge");
344			exit(1);
345			}
346			}
347
348			memset(&enc_config, 0, sizeof(enc_config));
349			enc_config.enc = 1;
350
351			/* first check the program name */
352			program_name(argv[0], pname, sizeof(pname));
353
354			if (strcmp(pname, "base64") == 0)
355			enc_config.base64 = 1;
356
357			#ifdef ZLIB
358			if (strcmp(pname, "zlib") == 0)
359			enc_config.do_zlib = 1;
360			#endif
361
362			enc_config.cipher = EVP_get_cipherbyname(pname);
363
364			#ifdef ZLIB
365			if (!enc_config.do_zlib && !enc_config.base64 &&
366			enc_config.cipher == NULL && strcmp(pname, "enc") != 0)
367			#else
368			if (!enc_config.base64 && enc_config.cipher == NULL &&
369			strcmp(pname, "enc") != 0)
370			#endif
371			{
372			BIO_printf(bio_err, "%s is an unknown cipher\n", pname);
373			goto end;
374			}
375
376			if (options_parse(argc, argv, enc_options, NULL, NULL) != 0) {
377			enc_usage();
378			goto end;
379			}
380
381			if (enc_config.keyfile != NULL) {
382			static char buf[128];
383			FILE *infile;
384
385			infile = fopen(enc_config.keyfile, "r");
386			if (infile == NULL) {
387			BIO_printf(bio_err, "unable to read key from '%s'\n",
388			enc_config.keyfile);
389			goto end;
390			}
391			buf[0] = '\0';
392			if (!fgets(buf, sizeof buf, infile)) {
393			BIO_printf(bio_err, "unable to read key from '%s'\n",
394			enc_config.keyfile);
395			fclose(infile);
396			goto end;
397			}
398			fclose(infile);
399			i = strlen(buf);
400			if ((i > 0) && ((buf[i - 1] == '\n') \|\| (buf[i - 1] == '\r')))
401			buf[--i] = '\0';
402			if ((i > 0) && ((buf[i - 1] == '\n') \|\| (buf[i - 1] == '\r')))
403			buf[--i] = '\0';
404			if (i < 1) {
405			BIO_printf(bio_err, "zero length password\n");
406			goto end;
407			}
408			enc_config.keystr = buf;
409			}
410
411			if (enc_config.md != NULL &&
412			(dgst = EVP_get_digestbyname(enc_config.md)) == NULL) {
413			BIO_printf(bio_err,
414			"%s is an unsupported message digest type\n",
415			enc_config.md);
416			goto end;
417			}
418			if (dgst == NULL) {
419			dgst = EVP_md5(); /* XXX */
420			}
421
422			if (enc_config.bufsize != NULL) {
423			char *p = enc_config.bufsize;
424			unsigned long n;
425
426			/* XXX - provide an OPTION_ARG_DISKUNIT. */
427			for (n = 0; *p != '\0'; p++) {
428			i = *p;
429			if ((i <= '9') && (i >= '0'))
430			n = n * 10 + i - '0';
431			else if (i == 'k') {
432			n *= 1024;
433			p++;
434			break;
435			}
436			}
437			if (*p != '\0') {
438			BIO_printf(bio_err, "invalid 'bufsize' specified.\n");
439			goto end;
440			}
441			/* It must be large enough for a base64 encoded line. */
442			if (enc_config.base64 && n < 80)
443			n = 80;
444
445			bsize = (int)n;
446			if (enc_config.verbose)
447			BIO_printf(bio_err, "bufsize=%d\n", bsize);
448			}
449			strbuf = malloc(SIZE);
450			buff = malloc(EVP_ENCODE_LENGTH(bsize));
451			if ((buff == NULL) \|\| (strbuf == NULL)) {
452			BIO_printf(bio_err, "malloc failure %ld\n", (long) EVP_ENCODE_LENGTH(bsize));
453			goto end;
454			}
455			in = BIO_new(BIO_s_file());
456			out = BIO_new(BIO_s_file());
457			if ((in == NULL) \|\| (out == NULL)) {
458			ERR_print_errors(bio_err);
459			goto end;
460			}
461			if (enc_config.debug) {
462			BIO_set_callback(in, BIO_debug_callback);
463			BIO_set_callback(out, BIO_debug_callback);
464			BIO_set_callback_arg(in, (char *) bio_err);
465			BIO_set_callback_arg(out, (char *) bio_err);
466			}
467			if (enc_config.inf == NULL) {
468			if (enc_config.bufsize != NULL)
469			setvbuf(stdin, (char *) NULL, _IONBF, 0);
470			BIO_set_fp(in, stdin, BIO_NOCLOSE);
471			} else {
472			if (BIO_read_filename(in, enc_config.inf) <= 0) {
473			perror(enc_config.inf);
474			goto end;
475			}
476			}
477
478			if (!enc_config.keystr && enc_config.passarg) {
479			if (!app_passwd(bio_err, enc_config.passarg, NULL,
480			&pass, NULL)) {
481			BIO_printf(bio_err, "Error getting password\n");
482			goto end;
483			}
484			enc_config.keystr = pass;
485			}
486			if (enc_config.keystr == NULL && enc_config.cipher != NULL &&
487			enc_config.hkey == NULL) {
488			for (;;) {
489			char buf[200];
490			int retval;
491
492			retval = snprintf(buf, sizeof buf,
493			"enter %s %s password:",
494			OBJ_nid2ln(EVP_CIPHER_nid(enc_config.cipher)),
495			enc_config.enc ? "encryption" : "decryption");
496			if ((size_t)retval >= sizeof buf) {
497			BIO_printf(bio_err,
498			"Password prompt too long\n");
499			goto end;
500			}
501			strbuf[0] = '\0';
502			i = EVP_read_pw_string((char *)strbuf, SIZE, buf,
503			enc_config.enc);
504			if (i == 0) {
505			if (strbuf[0] == '\0') {
506			ret = 1;
507			goto end;
508			}
509			enc_config.keystr = strbuf;
510			break;
511			}
512			if (i < 0) {
513			BIO_printf(bio_err, "bad password read\n");
514			goto end;
515			}
516			}
517			}
518			if (enc_config.outf == NULL) {
519			BIO_set_fp(out, stdout, BIO_NOCLOSE);
520			if (enc_config.bufsize != NULL)
521			setvbuf(stdout, (char *)NULL, _IONBF, 0);
522			} else {
523			if (BIO_write_filename(out, enc_config.outf) <= 0) {
524			perror(enc_config.outf);
525			goto end;
526			}
527			}
528
529			rbio = in;
530			wbio = out;
531
532			#ifdef ZLIB
533			if (do_zlib) {
534			if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
535			goto end;
536			if (enc)
537			wbio = BIO_push(bzl, wbio);
538			else
539			rbio = BIO_push(bzl, rbio);
540			}
541			#endif
542
543			if (enc_config.base64) {
544			if ((b64 = BIO_new(BIO_f_base64())) == NULL)
545			goto end;
546			if (enc_config.debug) {
547			BIO_set_callback(b64, BIO_debug_callback);
548			BIO_set_callback_arg(b64, (char *) bio_err);
549			}
550			if (enc_config.olb64)
551			BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
552			if (enc_config.enc)
553			wbio = BIO_push(b64, wbio);
554			else
555			rbio = BIO_push(b64, rbio);
556			}
557			if (enc_config.cipher != NULL) {
558			/*
559			* Note that keystr is NULL if a key was passed on the command
560			* line, so we get no salt in that case. Is this a bug?
561			*/
562			if (enc_config.keystr != NULL) {
563			/*
564			* Salt handling: if encrypting generate a salt and
565			* write to output BIO. If decrypting read salt from
566			* input BIO.
567			*/
568			unsigned char *sptr;
569			if (enc_config.nosalt)
570			sptr = NULL;
571			else {
572			if (enc_config.enc) {
573			if (enc_config.hsalt) {
574			if (!set_hex(enc_config.hsalt, salt, sizeof salt)) {
575			BIO_printf(bio_err,
576			"invalid hex salt value\n");
577			goto end;
578			}
579			} else
580			arc4random_buf(salt,
581			sizeof(salt));
582			/*
583			* If -P option then don't bother
584			* writing
585			*/
586			if ((enc_config.printkey != 2)
587			&& (BIO_write(wbio, magic,
588			sizeof magic - 1) != sizeof magic - 1
589			\|\| BIO_write(wbio,
590			(char *) salt,
591			sizeof salt) != sizeof salt)) {
592			BIO_printf(bio_err, "error writing output file\n");
593			goto end;
594			}
595			} else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
596			\|\| BIO_read(rbio,
597			(unsigned char *) salt,
598			sizeof salt) != sizeof salt) {
599			BIO_printf(bio_err, "error reading input file\n");
600			goto end;
601			} else if (memcmp(mbuf, magic, sizeof magic - 1)) {
602			BIO_printf(bio_err, "bad magic number\n");
603			goto end;
604			}
605			sptr = salt;
606			}
607
608			EVP_BytesToKey(enc_config.cipher, dgst, sptr,
609			(unsigned char *)enc_config.keystr,
610			strlen(enc_config.keystr), 1, key, iv);
611			/*
612			* zero the complete buffer or the string passed from
613			* the command line bug picked up by Larry J. Hughes
614			* Jr. <hughes@indiana.edu>
615			*/
616			if (enc_config.keystr == strbuf)
617			explicit_bzero(enc_config.keystr, SIZE);
618			else
619			explicit_bzero(enc_config.keystr,
620			strlen(enc_config.keystr));
621			}
622			if (enc_config.hiv != NULL &&
623			!set_hex(enc_config.hiv, iv, sizeof iv)) {
624			BIO_printf(bio_err, "invalid hex iv value\n");
625			goto end;
626			}
627			if (enc_config.hiv == NULL && enc_config.keystr == NULL &&
628			EVP_CIPHER_iv_length(enc_config.cipher) != 0) {
629			/*
630			* No IV was explicitly set and no IV was generated
631			* during EVP_BytesToKey. Hence the IV is undefined,
632			* making correct decryption impossible.
633			*/
634			BIO_printf(bio_err, "iv undefined\n");
635			goto end;
636			}
637			if (enc_config.hkey != NULL &&
638			!set_hex(enc_config.hkey, key, sizeof key)) {
639			BIO_printf(bio_err, "invalid hex key value\n");
640			goto end;
641			}
642			if ((benc = BIO_new(BIO_f_cipher())) == NULL)
643			goto end;
644
645			/*
646			* Since we may be changing parameters work on the encryption
647			* context rather than calling BIO_set_cipher().
648			*/
649
650			BIO_get_cipher_ctx(benc, &ctx);
651
652			if (!EVP_CipherInit_ex(ctx, enc_config.cipher, NULL, NULL,
653			NULL, enc_config.enc)) {
654			BIO_printf(bio_err, "Error setting cipher %s\n",
655			EVP_CIPHER_name(enc_config.cipher));
656			ERR_print_errors(bio_err);
657			goto end;
658			}
659			if (enc_config.nopad)
660			EVP_CIPHER_CTX_set_padding(ctx, 0);
661
662			if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv,
663			enc_config.enc)) {
664			BIO_printf(bio_err, "Error setting cipher %s\n",
665			EVP_CIPHER_name(enc_config.cipher));
666			ERR_print_errors(bio_err);
667			goto end;
668			}
669			if (enc_config.debug) {
670			BIO_set_callback(benc, BIO_debug_callback);
671			BIO_set_callback_arg(benc, (char *) bio_err);
672			}
673			if (enc_config.printkey) {
674			if (!enc_config.nosalt) {
675			printf("salt=");
676			for (i = 0; i < (int) sizeof(salt); i++)
677			printf("%02X", salt[i]);
678			printf("\n");
679			}
680			if (enc_config.cipher->key_len > 0) {
681			printf("key=");
682			for (i = 0; i < enc_config.cipher->key_len; i++)
683			printf("%02X", key[i]);
684			printf("\n");
685			}
686			if (enc_config.cipher->iv_len > 0) {
687			printf("iv =");
688			for (i = 0; i < enc_config.cipher->iv_len; i++)
689			printf("%02X", iv[i]);
690			printf("\n");
691			}
692			if (enc_config.printkey == 2) {
693			ret = 0;
694			goto end;
695			}
696			}
697			}
698			/* Only encrypt/decrypt as we write the file */
699			if (benc != NULL)
700			wbio = BIO_push(benc, wbio);
701
702			for (;;) {
703			inl = BIO_read(rbio, (char *) buff, bsize);
704			if (inl <= 0)
705			break;
706			if (BIO_write(wbio, (char *) buff, inl) != inl) {
707			BIO_printf(bio_err, "error writing output file\n");
708			goto end;
709			}
710			}
711			if (!BIO_flush(wbio)) {
712			BIO_printf(bio_err, "bad decrypt\n");
713			goto end;
714			}
715			ret = 0;
716			if (enc_config.verbose) {
717			BIO_printf(bio_err, "bytes read :%8ld\n", BIO_number_read(in));
718			BIO_printf(bio_err, "bytes written:%8ld\n", BIO_number_written(out));
719			}
720			end:
721			ERR_print_errors(bio_err);
722			free(strbuf);
723			free(buff);
724			BIO_free(in);
725			if (out != NULL)
726			BIO_free_all(out);
727			BIO_free(benc);
728			BIO_free(b64);
729			#ifdef ZLIB
730			BIO_free(bzl);
731			#endif
732			free(pass);
733
734			return (ret);
735			}
736
737			int
738			set_hex(char in, unsigned char out, int size)
739			{
740			int i, n;
741			unsigned char j;
742
743			n = strlen(in);
744			if (n > (size * 2)) {
745			BIO_printf(bio_err, "hex string is too long\n");
746			return (0);
747			}
748			memset(out, 0, size);
749			for (i = 0; i < n; i++) {
750			j = (unsigned char) *in;
751			*(in++) = '\0';
752			if (j == 0)
753			break;
754			if ((j >= '0') && (j <= '9'))
755			j -= '0';
756			else if ((j >= 'A') && (j <= 'F'))
757			j = j - 'A' + 10;
758			else if ((j >= 'a') && (j <= 'f'))
759			j = j - 'a' + 10;
760			else {
761			BIO_printf(bio_err, "non-hex digit\n");
762			return (0);
763			}
764			if (i & 1)
765			out[i / 2] \|= j;
766			else
767			out[i / 2] = (j << 4);
768			}
769			return (1);
770			}