File: [local] / src / usr.bin / openssl / dgst.c (download)
Revision 1.18, Fri Aug 30 12:32:14 2019 UTC (4 years, 9 months ago) by inoguchi
Branch: MAIN
CVS Tags: OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6 Changes since 1.17: +6 -11 lines
Remove unnecessary NULL check before free function in openssl(1) dgst
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/* $OpenBSD: dgst.c,v 1.18 2019/08/30 12:32:14 inoguchi 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/objects.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#define BUFSIZE 1024*8
int
do_fp(BIO * out, unsigned char *buf, BIO * bp, int sep, int binout,
EVP_PKEY * key, unsigned char *sigin, int siglen,
const char *sig_name, const char *md_name,
const char *file, BIO * bmd);
static struct {
int argsused;
int debug;
int do_verify;
char *hmac_key;
char *keyfile;
int keyform;
const EVP_MD *m;
char *mac_name;
STACK_OF(OPENSSL_STRING) *macopts;
const EVP_MD *md;
int out_bin;
char *outfile;
char *passargin;
int separator;
char *sigfile;
STACK_OF(OPENSSL_STRING) *sigopts;
int want_pub;
} dgst_config;
static int
dgst_opt_macopt(char *arg)
{
if (arg == NULL)
return (1);
if (dgst_config.macopts == NULL &&
(dgst_config.macopts = sk_OPENSSL_STRING_new_null()) == NULL)
return (1);
if (!sk_OPENSSL_STRING_push(dgst_config.macopts, arg))
return (1);
return (0);
}
static int
dgst_opt_md(int argc, char **argv, int *argsused)
{
char *name = argv[0];
if (*name++ != '-')
return (1);
if ((dgst_config.m = EVP_get_digestbyname(name)) == NULL)
return (1);
dgst_config.md = dgst_config.m;
*argsused = 1;
return (0);
}
static int
dgst_opt_prverify(char *arg)
{
if (arg == NULL)
return (1);
dgst_config.keyfile = arg;
dgst_config.do_verify = 1;
return (0);
}
static int
dgst_opt_sigopt(char *arg)
{
if (arg == NULL)
return (1);
if (dgst_config.sigopts == NULL &&
(dgst_config.sigopts = sk_OPENSSL_STRING_new_null()) == NULL)
return (1);
if (!sk_OPENSSL_STRING_push(dgst_config.sigopts, arg))
return (1);
return (0);
}
static int
dgst_opt_verify(char *arg)
{
if (arg == NULL)
return (1);
dgst_config.keyfile = arg;
dgst_config.want_pub = 1;
dgst_config.do_verify = 1;
return (0);
}
static const struct option dgst_options[] = {
{
.name = "binary",
.desc = "Output the digest or signature in binary form",
.type = OPTION_VALUE,
.opt.value = &dgst_config.out_bin,
.value = 1,
},
{
.name = "c",
.desc = "Print the digest in two-digit groups separated by colons",
.type = OPTION_VALUE,
.opt.value = &dgst_config.separator,
.value = 1,
},
{
.name = "d",
.desc = "Print BIO debugging information",
.type = OPTION_FLAG,
.opt.flag = &dgst_config.debug,
},
{
.name = "hex",
.desc = "Output as hex dump",
.type = OPTION_VALUE,
.opt.value = &dgst_config.out_bin,
.value = 0,
},
{
.name = "hmac",
.argname = "key",
.desc = "Create hashed MAC with key",
.type = OPTION_ARG,
.opt.arg = &dgst_config.hmac_key,
},
{
.name = "keyform",
.argname = "format",
.desc = "Key file format (PEM)",
.type = OPTION_ARG_FORMAT,
.opt.value = &dgst_config.keyform,
},
{
.name = "mac",
.argname = "algorithm",
.desc = "Create MAC (not necessarily HMAC)",
.type = OPTION_ARG,
.opt.arg = &dgst_config.mac_name,
},
{
.name = "macopt",
.argname = "nm:v",
.desc = "MAC algorithm parameters or key",
.type = OPTION_ARG_FUNC,
.opt.argfunc = dgst_opt_macopt,
},
{
.name = "out",
.argname = "file",
.desc = "Output to file rather than stdout",
.type = OPTION_ARG,
.opt.arg = &dgst_config.outfile,
},
{
.name = "passin",
.argname = "arg",
.desc = "Input file passphrase source",
.type = OPTION_ARG,
.opt.arg = &dgst_config.passargin,
},
{
.name = "prverify",
.argname = "file",
.desc = "Verify a signature using private key in file",
.type = OPTION_ARG_FUNC,
.opt.argfunc = dgst_opt_prverify,
},
{
.name = "r",
.desc = "Output the digest in coreutils format",
.type = OPTION_VALUE,
.opt.value = &dgst_config.separator,
.value = 2,
},
{
.name = "sign",
.argname = "file",
.desc = "Sign digest using private key in file",
.type = OPTION_ARG,
.opt.arg = &dgst_config.keyfile,
},
{
.name = "signature",
.argname = "file",
.desc = "Signature to verify",
.type = OPTION_ARG,
.opt.arg = &dgst_config.sigfile,
},
{
.name = "sigopt",
.argname = "nm:v",
.desc = "Signature parameter",
.type = OPTION_ARG_FUNC,
.opt.argfunc = dgst_opt_sigopt,
},
{
.name = "verify",
.argname = "file",
.desc = "Verify a signature using public key in file",
.type = OPTION_ARG_FUNC,
.opt.argfunc = dgst_opt_verify,
},
{
.name = NULL,
.desc = "",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = dgst_opt_md,
},
{ NULL },
};
static void
list_md_fn(const EVP_MD * m, const char *from, const char *to, void *arg)
{
const char *mname;
/* Skip aliases */
if (!m)
return;
mname = OBJ_nid2ln(EVP_MD_type(m));
/* Skip shortnames */
if (strcmp(from, mname))
return;
/* Skip clones */
if (EVP_MD_flags(m) & EVP_MD_FLAG_PKEY_DIGEST)
return;
if (strchr(mname, ' '))
mname = EVP_MD_name(m);
BIO_printf(arg, " -%-17s To use the %s message digest algorithm\n",
mname, mname);
}
static void
dgst_usage(void)
{
fprintf(stderr, "usage: dgst [-cdr] [-binary] [-digest] [-hex]");
fprintf(stderr, " [-hmac key] [-keyform fmt]\n");
fprintf(stderr, " [-mac algorithm] [-macopt nm:v] [-out file]");
fprintf(stderr, " [-passin arg]\n");
fprintf(stderr, " [-prverify file] [-sign file]");
fprintf(stderr, " [-signature file]\n");
fprintf(stderr, " [-sigopt nm:v] [-verify file] [file ...]\n\n");
options_usage(dgst_options);
EVP_MD_do_all_sorted(list_md_fn, bio_err);
fprintf(stderr, "\n");
}
int
dgst_main(int argc, char **argv)
{
unsigned char *buf = NULL;
int i, err = 1;
BIO *in = NULL, *inp;
BIO *bmd = NULL;
BIO *out = NULL;
#define PROG_NAME_SIZE 39
char pname[PROG_NAME_SIZE + 1];
EVP_PKEY *sigkey = NULL;
unsigned char *sigbuf = NULL;
int siglen = 0;
char *passin = NULL;
if (single_execution) {
if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
perror("pledge");
exit(1);
}
}
if ((buf = malloc(BUFSIZE)) == NULL) {
BIO_printf(bio_err, "out of memory\n");
goto end;
}
memset(&dgst_config, 0, sizeof(dgst_config));
dgst_config.keyform = FORMAT_PEM;
dgst_config.out_bin = -1;
/* first check the program name */
program_name(argv[0], pname, sizeof pname);
dgst_config.md = EVP_get_digestbyname(pname);
if (options_parse(argc, argv, dgst_options, NULL,
&dgst_config.argsused) != 0) {
dgst_usage();
goto end;
}
argc -= dgst_config.argsused;
argv += dgst_config.argsused;
if (dgst_config.do_verify && !dgst_config.sigfile) {
BIO_printf(bio_err,
"No signature to verify: use the -signature option\n");
goto end;
}
in = BIO_new(BIO_s_file());
bmd = BIO_new(BIO_f_md());
if (in == NULL || bmd == NULL) {
ERR_print_errors(bio_err);
goto end;
}
if (dgst_config.debug) {
BIO_set_callback(in, BIO_debug_callback);
/* needed for windows 3.1 */
BIO_set_callback_arg(in, (char *) bio_err);
}
if (!app_passwd(bio_err, dgst_config.passargin, NULL, &passin, NULL)) {
BIO_printf(bio_err, "Error getting password\n");
goto end;
}
if (dgst_config.out_bin == -1) {
if (dgst_config.keyfile)
dgst_config.out_bin = 1;
else
dgst_config.out_bin = 0;
}
if (dgst_config.outfile) {
if (dgst_config.out_bin)
out = BIO_new_file(dgst_config.outfile, "wb");
else
out = BIO_new_file(dgst_config.outfile, "w");
} else {
out = BIO_new_fp(stdout, BIO_NOCLOSE);
}
if (!out) {
BIO_printf(bio_err, "Error opening output file %s\n",
dgst_config.outfile ? dgst_config.outfile : "(stdout)");
ERR_print_errors(bio_err);
goto end;
}
if ((!!dgst_config.mac_name + !!dgst_config.keyfile +
!!dgst_config.hmac_key) > 1) {
BIO_printf(bio_err,
"MAC and Signing key cannot both be specified\n");
goto end;
}
if (dgst_config.keyfile) {
if (dgst_config.want_pub)
sigkey = load_pubkey(bio_err, dgst_config.keyfile,
dgst_config.keyform, 0, NULL, "key file");
else
sigkey = load_key(bio_err, dgst_config.keyfile,
dgst_config.keyform, 0, passin, "key file");
if (!sigkey) {
/*
* load_[pub]key() has already printed an appropriate
* message
*/
goto end;
}
}
if (dgst_config.mac_name) {
EVP_PKEY_CTX *mac_ctx = NULL;
int r = 0;
if (!init_gen_str(bio_err, &mac_ctx, dgst_config.mac_name, 0))
goto mac_end;
if (dgst_config.macopts) {
char *macopt;
for (i = 0; i < sk_OPENSSL_STRING_num(
dgst_config.macopts); i++) {
macopt = sk_OPENSSL_STRING_value(
dgst_config.macopts, i);
if (pkey_ctrl_string(mac_ctx, macopt) <= 0) {
BIO_printf(bio_err,
"MAC parameter error \"%s\"\n",
macopt);
ERR_print_errors(bio_err);
goto mac_end;
}
}
}
if (EVP_PKEY_keygen(mac_ctx, &sigkey) <= 0) {
BIO_puts(bio_err, "Error generating key\n");
ERR_print_errors(bio_err);
goto mac_end;
}
r = 1;
mac_end:
EVP_PKEY_CTX_free(mac_ctx);
if (r == 0)
goto end;
}
if (dgst_config.hmac_key) {
sigkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL,
(unsigned char *) dgst_config.hmac_key, -1);
if (!sigkey)
goto end;
}
if (sigkey) {
EVP_MD_CTX *mctx = NULL;
EVP_PKEY_CTX *pctx = NULL;
int r;
if (!BIO_get_md_ctx(bmd, &mctx)) {
BIO_printf(bio_err, "Error getting context\n");
ERR_print_errors(bio_err);
goto end;
}
if (dgst_config.do_verify)
r = EVP_DigestVerifyInit(mctx, &pctx, dgst_config.md,
NULL, sigkey);
else
r = EVP_DigestSignInit(mctx, &pctx, dgst_config.md,
NULL, sigkey);
if (!r) {
BIO_printf(bio_err, "Error setting context\n");
ERR_print_errors(bio_err);
goto end;
}
if (dgst_config.sigopts) {
char *sigopt;
for (i = 0; i < sk_OPENSSL_STRING_num(
dgst_config.sigopts); i++) {
sigopt = sk_OPENSSL_STRING_value(
dgst_config.sigopts, i);
if (pkey_ctrl_string(pctx, sigopt) <= 0) {
BIO_printf(bio_err,
"parameter error \"%s\"\n",
sigopt);
ERR_print_errors(bio_err);
goto end;
}
}
}
}
/* we use md as a filter, reading from 'in' */
else {
if (dgst_config.md == NULL)
dgst_config.md = EVP_sha256();
if (!BIO_set_md(bmd, dgst_config.md)) {
BIO_printf(bio_err, "Error setting digest %s\n", pname);
ERR_print_errors(bio_err);
goto end;
}
}
if (dgst_config.sigfile && sigkey) {
BIO *sigbio;
siglen = EVP_PKEY_size(sigkey);
sigbuf = malloc(siglen);
if (sigbuf == NULL) {
BIO_printf(bio_err, "out of memory\n");
ERR_print_errors(bio_err);
goto end;
}
sigbio = BIO_new_file(dgst_config.sigfile, "rb");
if (!sigbio) {
BIO_printf(bio_err, "Error opening signature file %s\n",
dgst_config.sigfile);
ERR_print_errors(bio_err);
goto end;
}
siglen = BIO_read(sigbio, sigbuf, siglen);
BIO_free(sigbio);
if (siglen <= 0) {
BIO_printf(bio_err, "Error reading signature file %s\n",
dgst_config.sigfile);
ERR_print_errors(bio_err);
goto end;
}
}
inp = BIO_push(bmd, in);
if (dgst_config.md == NULL) {
EVP_MD_CTX *tctx;
BIO_get_md_ctx(bmd, &tctx);
dgst_config.md = EVP_MD_CTX_md(tctx);
}
if (argc == 0) {
BIO_set_fp(in, stdin, BIO_NOCLOSE);
err = do_fp(out, buf, inp, dgst_config.separator,
dgst_config.out_bin, sigkey, sigbuf, siglen, NULL, NULL,
"stdin", bmd);
} else {
const char *md_name = NULL, *sig_name = NULL;
if (!dgst_config.out_bin) {
if (sigkey) {
const EVP_PKEY_ASN1_METHOD *ameth;
ameth = EVP_PKEY_get0_asn1(sigkey);
if (ameth)
EVP_PKEY_asn1_get0_info(NULL, NULL,
NULL, NULL, &sig_name, ameth);
}
md_name = EVP_MD_name(dgst_config.md);
}
err = 0;
for (i = 0; i < argc; i++) {
int r;
if (BIO_read_filename(in, argv[i]) <= 0) {
perror(argv[i]);
err++;
continue;
} else {
r = do_fp(out, buf, inp, dgst_config.separator,
dgst_config.out_bin, sigkey, sigbuf, siglen,
sig_name, md_name, argv[i], bmd);
}
if (r)
err = r;
(void) BIO_reset(bmd);
}
}
end:
freezero(buf, BUFSIZE);
BIO_free(in);
free(passin);
BIO_free_all(out);
EVP_PKEY_free(sigkey);
sk_OPENSSL_STRING_free(dgst_config.sigopts);
sk_OPENSSL_STRING_free(dgst_config.macopts);
free(sigbuf);
BIO_free(bmd);
return (err);
}
int
do_fp(BIO * out, unsigned char *buf, BIO * bp, int sep, int binout,
EVP_PKEY * key, unsigned char *sigin, int siglen,
const char *sig_name, const char *md_name,
const char *file, BIO * bmd)
{
size_t len;
int i;
for (;;) {
i = BIO_read(bp, (char *) buf, BUFSIZE);
if (i < 0) {
BIO_printf(bio_err, "Read Error in %s\n", file);
ERR_print_errors(bio_err);
return 1;
}
if (i == 0)
break;
}
if (sigin) {
EVP_MD_CTX *ctx;
BIO_get_md_ctx(bp, &ctx);
i = EVP_DigestVerifyFinal(ctx, sigin, (unsigned int) siglen);
if (i > 0)
BIO_printf(out, "Verified OK\n");
else if (i == 0) {
BIO_printf(out, "Verification Failure\n");
return 1;
} else {
BIO_printf(bio_err, "Error Verifying Data\n");
ERR_print_errors(bio_err);
return 1;
}
return 0;
}
if (key) {
EVP_MD_CTX *ctx;
BIO_get_md_ctx(bp, &ctx);
len = BUFSIZE;
if (!EVP_DigestSignFinal(ctx, buf, &len)) {
BIO_printf(bio_err, "Error Signing Data\n");
ERR_print_errors(bio_err);
return 1;
}
} else {
len = BIO_gets(bp, (char *) buf, BUFSIZE);
if ((int) len < 0) {
ERR_print_errors(bio_err);
return 1;
}
}
if (binout)
BIO_write(out, buf, len);
else if (sep == 2) {
for (i = 0; i < (int) len; i++)
BIO_printf(out, "%02x", buf[i]);
BIO_printf(out, " *%s\n", file);
} else {
if (sig_name)
BIO_printf(out, "%s-%s(%s)= ", sig_name, md_name, file);
else if (md_name)
BIO_printf(out, "%s(%s)= ", md_name, file);
else
BIO_printf(out, "(%s)= ", file);
for (i = 0; i < (int) len; i++) {
if (sep && (i != 0))
BIO_printf(out, ":");
BIO_printf(out, "%02x", buf[i]);
}
BIO_printf(out, "\n");
}
return 0;
}