p12split.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <libintl.h>
#include <locale.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wanboot_impl.h>
#include <unistd.h>
#include <string.h>
#include <libinetutil.h>
#include <wanbootutil.h>
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/pkcs12.h>
#include <openssl/evp.h>
#include <p12aux.h>
static boolean_t verbose = B_FALSE; /* When nonzero, do in verbose mode */
/* The following match/cert values require PKCS12 */
static int matchty; /* Type of matching do to on input */
static char *k_matchval; /* localkeyid value to match */
static uint_t k_len; /* length of k_matchval */
#define IO_KEYFILE 1 /* Have a separate key file or data */
#define IO_CERTFILE 2 /* Have a separate cert file or data */
#define IO_TRUSTFILE 4 /* Have a separate trustanchor file */
static char *input = NULL; /* Consolidated input file */
static char *key_out = NULL; /* Key file to be output */
static char *cert_out = NULL; /* Cert file to be output */
static char *trust_out = NULL; /* Trust anchor file to be output */
static uint_t outfiles; /* What files are there for output */
static char *progname;
/* Returns from time_check */
typedef enum {
CHK_TIME_OK = 0, /* Cert in effect and not expired */
CHK_TIME_BEFORE_BAD, /* not_before field is invalid */
CHK_TIME_AFTER_BAD, /* not_after field is invalid */
CHK_TIME_IS_BEFORE, /* Cert not yet in force */
CHK_TIME_HAS_EXPIRED /* Cert has expired */
} time_errs_t;
static int parse_keyid(const char *);
static int do_certs(void);
static int read_files(STACK_OF(X509) **, X509 **, EVP_PKEY **);
static void check_certs(STACK_OF(X509) *, X509 **);
static time_errs_t time_check_print(X509 *);
static time_errs_t time_check(X509 *);
static int write_files(STACK_OF(X509) *, X509 *, EVP_PKEY *);
static int get_ifile(char *, char *, EVP_PKEY **, X509 **, STACK_OF(X509) **);
static int do_ofile(char *, EVP_PKEY *, X509 *, STACK_OF(X509) *);
static void usage(void);
static const char *cryptoerr(void);
int
main(int argc, char **argv)
{
int i;
/*
* Do the necessary magic for localization support.
*/
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
(void) textdomain(TEXT_DOMAIN);
progname = strrchr(argv[0], '/');
if (progname != NULL)
progname++;
else
progname = argv[0];
wbku_errinit(progname);
matchty = DO_FIRST_PAIR;
while ((i = getopt(argc, argv, "vc:i:k:l:t:")) != -1) {
switch (i) {
case 'v':
verbose = B_TRUE;
break;
case 'l':
if (parse_keyid(optarg) < 0)
return (EXIT_FAILURE);
matchty = DO_FIND_KEYID;
break;
case 'c':
cert_out = optarg;
outfiles |= IO_CERTFILE;
break;
case 'k':
key_out = optarg;
outfiles |= IO_KEYFILE;
break;
case 't':
trust_out = optarg;
outfiles |= IO_TRUSTFILE;
break;
case 'i':
input = optarg;
break;
default:
usage();
}
}
if (input == NULL) {
wbku_printerr("no input file specified\n");
usage();
}
/*
* Need output files.
*/
if (outfiles == 0) {
wbku_printerr("at least one output file must be specified\n");
usage();
}
if (do_certs() < 0)
return (EXIT_FAILURE);
return (EXIT_SUCCESS);
}
static int
parse_keyid(const char *keystr)
{
const char *rp;
char *wp;
char *nkeystr;
uint_t nkeystrlen;
/*
* In the worst case, we'll need one additional character in our
* output string -- e.g. "A\0" -> "0A\0"
*/
nkeystrlen = strlen(keystr) + 2;
k_len = (nkeystrlen + 1) / 2;
nkeystr = malloc(nkeystrlen);
k_matchval = malloc(k_len);
if (nkeystr == NULL || k_matchval == NULL) {
free(nkeystr);
free(k_matchval);
wbku_printerr("cannot allocate keyid");
return (-1);
}
/*
* For convenience, we allow the user to put spaces between each digit
* when entering it on the command line. As a result, we need to
* process it into a format that hexascii_to_octet() can handle. Note
* that we're careful to map strings like "AA B CC D" to "AA0BCC0D".
*/
for (rp = keystr, wp = nkeystr; *rp != '\0'; rp++) {
if (*rp == ' ')
continue;
if (rp[1] == ' ' || rp[1] == '\0') {
*wp++ = '0'; /* one character sequence; prepend 0 */
*wp++ = *rp;
} else {
*wp++ = *rp++;
*wp++ = *rp;
}
}
*wp = '\0';
if (hexascii_to_octet(nkeystr, wp - nkeystr, k_matchval, &k_len) != 0) {
free(nkeystr);
free(k_matchval);
wbku_printerr("invalid keyid `%s'\n", keystr);
return (-1);
}
free(nkeystr);
return (0);
}
static int
do_certs(void)
{
char *bufp;
STACK_OF(X509) *ta_in = NULL;
EVP_PKEY *pkey_in = NULL;
X509 *xcert_in = NULL;
sunw_crypto_init();
if (read_files(&ta_in, &xcert_in, &pkey_in) < 0)
return (-1);
if (verbose) {
if (xcert_in != NULL) {
(void) printf(gettext("\nMain cert:\n"));
/*
* sunw_subject_attrs() returns a pointer to
* memory allocated on our behalf. The same
* behavior is exhibited by sunw_issuer_attrs().
*/
bufp = sunw_subject_attrs(xcert_in, NULL, 0);
if (bufp != NULL) {
(void) printf(gettext(" Subject: %s\n"),
bufp);
OPENSSL_free(bufp);
}
bufp = sunw_issuer_attrs(xcert_in, NULL, 0);
if (bufp != NULL) {
(void) printf(gettext(" Issuer: %s\n"), bufp);
OPENSSL_free(bufp);
}
(void) sunw_print_times(stdout, PRNT_BOTH, NULL,
xcert_in);
}
if (ta_in != NULL) {
X509 *x;
int i;
for (i = 0; i < sk_X509_num(ta_in); i++) {
/* LINTED */
x = sk_X509_value(ta_in, i);
(void) printf(
gettext("\nTrust Anchor cert %d:\n"), i);
/*
* sunw_subject_attrs() returns a pointer to
* memory allocated on our behalf. We get the
* same behavior from sunw_issuer_attrs().
*/
bufp = sunw_subject_attrs(x, NULL, 0);
if (bufp != NULL) {
(void) printf(
gettext(" Subject: %s\n"), bufp);
OPENSSL_free(bufp);
}
bufp = sunw_issuer_attrs(x, NULL, 0);
if (bufp != NULL) {
(void) printf(
gettext(" Issuer: %s\n"), bufp);
OPENSSL_free(bufp);
}
(void) sunw_print_times(stdout, PRNT_BOTH,
NULL, x);
}
}
}
check_certs(ta_in, &xcert_in);
if (xcert_in != NULL && pkey_in != NULL) {
if (sunw_check_keys(xcert_in, pkey_in) == 0) {
wbku_printerr("warning: key and certificate do "
"not match\n");
}
}
return (write_files(ta_in, xcert_in, pkey_in));
}
static int
read_files(STACK_OF(X509) **t_in, X509 **c_in, EVP_PKEY **k_in)
{
char *i_pass;
i_pass = getpassphrase(gettext("Enter key password: "));
if (get_ifile(input, i_pass, k_in, c_in, t_in) < 0)
return (-1);
/*
* If we are only interested in getting a trust anchor, and if there
* is no trust anchor but is a regular cert, use it instead. Do this
* to handle the insanity with openssl, which requires a matching cert
* and key in order to write a PKCS12 file.
*/
if (outfiles == IO_TRUSTFILE) {
if (c_in != NULL && *c_in != NULL && t_in != NULL) {
if (*t_in == NULL) {
if ((*t_in = sk_X509_new_null()) == NULL) {
wbku_printerr("out of memory\n");
return (-1);
}
}
if (sk_X509_num(*t_in) == 0) {
if (sk_X509_push(*t_in, *c_in) == 0) {
wbku_printerr("out of memory\n");
return (-1);
}
*c_in = NULL;
}
}
}
if ((outfiles & IO_KEYFILE) && *k_in == NULL) {
wbku_printerr("no matching key found\n");
return (-1);
}
if ((outfiles & IO_CERTFILE) && *c_in == NULL) {
wbku_printerr("no matching certificate found\n");
return (-1);
}
if ((outfiles & IO_TRUSTFILE) && *t_in == NULL) {
wbku_printerr("no matching trust anchor found\n");
return (-1);
}
return (0);
}
static void
check_certs(STACK_OF(X509) *ta_in, X509 **c_in)
{
X509 *curr;
time_errs_t ret;
int i;
int del_expired = (outfiles != 0);
if (c_in != NULL && *c_in != NULL) {
ret = time_check_print(*c_in);
if ((ret != CHK_TIME_OK && ret != CHK_TIME_IS_BEFORE) &&
del_expired) {
(void) fprintf(stderr, gettext(" Removing cert\n"));
X509_free(*c_in);
*c_in = NULL;
}
}
if (ta_in == NULL)
return;
for (i = 0; i < sk_X509_num(ta_in); ) {
/* LINTED */
curr = sk_X509_value(ta_in, i);
ret = time_check_print(curr);
if ((ret != CHK_TIME_OK && ret != CHK_TIME_IS_BEFORE) &&
del_expired) {
(void) fprintf(stderr, gettext(" Removing cert\n"));
/* LINTED */
curr = sk_X509_delete(ta_in, i);
X509_free(curr);
continue;
}
i++;
}
}
static time_errs_t
time_check_print(X509 *cert)
{
char buf[256];
int ret;
ret = time_check(cert);
if (ret == CHK_TIME_OK)
return (CHK_TIME_OK);
(void) fprintf(stderr, gettext(" Subject: %s"),
sunw_subject_attrs(cert, buf, sizeof (buf)));
(void) fprintf(stderr, gettext(" Issuer: %s"),
sunw_issuer_attrs(cert, buf, sizeof (buf)));
switch (ret) {
case CHK_TIME_BEFORE_BAD:
(void) fprintf(stderr,
gettext("\n Invalid cert 'not before' field\n"));
break;
case CHK_TIME_AFTER_BAD:
(void) fprintf(stderr,
gettext("\n Invalid cert 'not after' field\n"));
break;
case CHK_TIME_HAS_EXPIRED:
(void) sunw_print_times(stderr, PRNT_NOT_AFTER,
gettext("\n Cert has expired\n"), cert);
break;
case CHK_TIME_IS_BEFORE:
(void) sunw_print_times(stderr, PRNT_NOT_BEFORE,
gettext("\n Warning: cert not yet valid\n"), cert);
break;
default:
break;
}
return (ret);
}
static time_errs_t
time_check(X509 *cert)
{
int i;
i = X509_cmp_time(X509_get_notBefore(cert), NULL);
if (i == 0)
return (CHK_TIME_BEFORE_BAD);
if (i > 0)
return (CHK_TIME_IS_BEFORE);
/* After 'not before' time */
i = X509_cmp_time(X509_get_notAfter(cert), NULL);
if (i == 0)
return (CHK_TIME_AFTER_BAD);
if (i < 0)
return (CHK_TIME_HAS_EXPIRED);
return (CHK_TIME_OK);
}
static int
write_files(STACK_OF(X509) *t_out, X509 *c_out, EVP_PKEY *k_out)
{
if (key_out != NULL) {
if (verbose)
(void) printf(gettext("%s: writing key\n"), progname);
if (do_ofile(key_out, k_out, NULL, NULL) < 0)
return (-1);
}
if (cert_out != NULL) {
if (verbose)
(void) printf(gettext("%s: writing cert\n"), progname);
if (do_ofile(cert_out, NULL, c_out, NULL) < 0)
return (-1);
}
if (trust_out != NULL) {
if (verbose)
(void) printf(gettext("%s: writing trust\n"),
progname);
if (do_ofile(trust_out, NULL, NULL, t_out) < 0)
return (-1);
}
return (0);
}
static int
get_ifile(char *name, char *pass, EVP_PKEY **tmp_k, X509 **tmp_c,
STACK_OF(X509) **tmp_t)
{
PKCS12 *p12;
FILE *fp;
int ret;
struct stat sbuf;
if (stat(name, &sbuf) == 0 && !S_ISREG(sbuf.st_mode)) {
wbku_printerr("%s is not a regular file\n", name);
return (-1);
}
if ((fp = fopen(name, "r")) == NULL) {
wbku_printerr("cannot open input file %s", name);
return (-1);
}
p12 = d2i_PKCS12_fp(fp, NULL);
if (p12 == NULL) {
wbku_printerr("cannot read file %s: %s\n", name, cryptoerr());
(void) fclose(fp);
return (-1);
}
(void) fclose(fp);
ret = sunw_PKCS12_parse(p12, pass, matchty, k_matchval, k_len,
NULL, tmp_k, tmp_c, tmp_t);
if (ret <= 0) {
if (ret == 0)
wbku_printerr("cannot find matching cert and key\n");
else
wbku_printerr("cannot parse %s: %s\n", name,
cryptoerr());
PKCS12_free(p12);
return (-1);
}
return (0);
}
static int
do_ofile(char *name, EVP_PKEY *pkey, X509 *cert, STACK_OF(X509) *ta)
{
STACK_OF(EVP_PKEY) *klist = NULL;
STACK_OF(X509) *clist = NULL;
PKCS12 *p12 = NULL;
int ret = 0;
FILE *fp;
struct stat sbuf;
if (stat(name, &sbuf) == 0 && !S_ISREG(sbuf.st_mode)) {
wbku_printerr("%s is not a regular file\n", name);
return (-1);
}
if ((fp = fopen(name, "w")) == NULL) {
wbku_printerr("cannot open output file %s", name);
return (-1);
}
if ((clist = sk_X509_new_null()) == NULL ||
(klist = sk_EVP_PKEY_new_null()) == NULL) {
wbku_printerr("out of memory\n");
ret = -1;
goto cleanup;
}
if (cert != NULL && sk_X509_push(clist, cert) == 0) {
wbku_printerr("out of memory\n");
ret = -1;
goto cleanup;
}
if (pkey != NULL && sk_EVP_PKEY_push(klist, pkey) == 0) {
wbku_printerr("out of memory\n");
ret = -1;
goto cleanup;
}
p12 = sunw_PKCS12_create(WANBOOT_PASSPHRASE, klist, clist, ta);
if (p12 == NULL) {
wbku_printerr("cannot create %s: %s\n", name, cryptoerr());
ret = -1;
goto cleanup;
}
if (i2d_PKCS12_fp(fp, p12) == 0) {
wbku_printerr("cannot write %s: %s\n", name, cryptoerr());
ret = -1;
goto cleanup;
}
cleanup:
(void) fclose(fp);
if (p12 != NULL)
PKCS12_free(p12);
/*
* Put the cert and pkey off of the stack so that they won't
* be freed two times. (If they get left in the stack then
* they will be freed with the stack.)
*/
if (clist != NULL) {
if (cert != NULL && sk_X509_num(clist) == 1) {
/* LINTED */
(void) sk_X509_delete(clist, 0);
}
sk_X509_pop_free(clist, X509_free);
}
if (klist != NULL) {
if (pkey != NULL && sk_EVP_PKEY_num(klist) == 1) {
/* LINTED */
(void) sk_EVP_PKEY_delete(klist, 0);
}
sk_EVP_PKEY_pop_free(klist, sunw_evp_pkey_free);
}
return (ret);
}
static void
usage(void)
{
(void) fprintf(stderr,
gettext("usage:\n"
" %s -i <file> -c <file> -k <file> -t <file> [-l <keyid> -v]\n"
"\n"),
progname);
(void) fprintf(stderr,
gettext(" where:\n"
" -i - input file to be split into component parts and put in\n"
" files given by -c, -k and -t\n"
" -c - output file for the client certificate\n"
" -k - output file for the client private key\n"
" -t - output file for the remaining certificates (assumed\n"
" to be trust anchors)\n"
"\n Files are assumed to be pkcs12-format files.\n\n"
" -v - verbose\n"
" -l - value of 'localkeyid' attribute in client cert and\n"
" private key to be selected from the input file.\n\n"));
exit(EXIT_FAILURE);
}
/*
* Return a pointer to a static buffer that contains a listing of crypto
* errors. We presume that the user doesn't want more than 8KB of error
* messages :-)
*/
static const char *
cryptoerr(void)
{
static char errbuf[8192];
ulong_t err;
const char *pfile;
int line;
unsigned int nerr = 0;
errbuf[0] = '\0';
while ((err = ERR_get_error_line(&pfile, &line)) != 0) {
if (++nerr > 1)
(void) strlcat(errbuf, "\n\t", sizeof (errbuf));
if (err == (ulong_t)-1) {
(void) strlcat(errbuf, strerror(errno),
sizeof (errbuf));
break;
}
(void) strlcat(errbuf, ERR_reason_error_string(err),
sizeof (errbuf));
}
return (errbuf);
}