/* $OpenBSD: apps.c,v 1.72 2025/03/18 13:03:08 tb Exp $ */
/*
 * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
/* 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.]
 */
/* ====================================================================
 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <sys/types.h>
#include <sys/stat.h>

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>

#include "apps.h"

#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
#include <openssl/rsa.h>
#include <openssl/safestack.h>
#include <openssl/ssl.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>

typedef struct {
        const char *name;
        unsigned long flag;
        unsigned long mask;
} NAME_EX_TBL;

UI_METHOD *ui_method = NULL;

static int set_table_opts(unsigned long *flags, const char *arg,
    const NAME_EX_TBL *in_tbl);
static int set_multi_opts(unsigned long *flags, const char *arg,
    const NAME_EX_TBL *in_tbl);

int
str2fmt(char *s)
{
        if (s == NULL)
                return FORMAT_UNDEF;
        if ((*s == 'D') || (*s == 'd'))
                return (FORMAT_ASN1);
        else if ((*s == 'T') || (*s == 't'))
                return (FORMAT_TEXT);
        else if ((*s == 'S') || (*s == 's'))
                return (FORMAT_SMIME);
        else if ((*s == 'M') || (*s == 'm'))
                return (FORMAT_MSBLOB);
        else if ((*s == '1') ||
            (strcmp(s, "PKCS12") == 0) || (strcmp(s, "pkcs12") == 0) ||
            (strcmp(s, "P12") == 0) || (strcmp(s, "p12") == 0))
                return (FORMAT_PKCS12);
        else if ((*s == 'P') || (*s == 'p')) {
                if (s[1] == 'V' || s[1] == 'v')
                        return FORMAT_PVK;
                else
                        return (FORMAT_PEM);
        } else
                return (FORMAT_UNDEF);
}

void
program_name(char *in, char *out, int size)
{
        char *p;

        p = strrchr(in, '/');
        if (p != NULL)
                p++;
        else
                p = in;
        strlcpy(out, p, size);
}

int
dump_cert_text(BIO *out, X509 *x)
{
        char *p;

        p = X509_NAME_oneline(X509_get_subject_name(x), NULL, 0);
        BIO_puts(out, "subject=");
        BIO_puts(out, p);
        free(p);

        p = X509_NAME_oneline(X509_get_issuer_name(x), NULL, 0);
        BIO_puts(out, "\nissuer=");
        BIO_puts(out, p);
        BIO_puts(out, "\n");
        free(p);

        return 0;
}

int
ui_open(UI *ui)
{
        return UI_method_get_opener(UI_OpenSSL()) (ui);
}

int
ui_read(UI *ui, UI_STRING *uis)
{
        const char *password;
        int string_type;

        if (UI_get_input_flags(uis) & UI_INPUT_FLAG_DEFAULT_PWD &&
            UI_get0_user_data(ui)) {
                string_type = UI_get_string_type(uis);
                if (string_type == UIT_PROMPT || string_type == UIT_VERIFY) {
                        password =
                            ((PW_CB_DATA *)UI_get0_user_data(ui))->password;
                        if (password && password[0] != '\0') {
                                UI_set_result(ui, uis, password);
                                return 1;
                        }
                }
        }
        return UI_method_get_reader(UI_OpenSSL()) (ui, uis);
}

int
ui_write(UI *ui, UI_STRING *uis)
{
        const char *password;
        int string_type;

        if (UI_get_input_flags(uis) & UI_INPUT_FLAG_DEFAULT_PWD &&
            UI_get0_user_data(ui)) {
                string_type = UI_get_string_type(uis);
                if (string_type == UIT_PROMPT || string_type == UIT_VERIFY) {
                        password =
                            ((PW_CB_DATA *)UI_get0_user_data(ui))->password;
                        if (password && password[0] != '\0')
                                return 1;
                }
        }
        return UI_method_get_writer(UI_OpenSSL()) (ui, uis);
}

int
ui_close(UI *ui)
{
        return UI_method_get_closer(UI_OpenSSL()) (ui);
}

int
password_callback(char *buf, int bufsiz, int verify, void *arg)
{
        PW_CB_DATA *cb_tmp = arg;
        UI *ui = NULL;
        int res = 0;
        const char *prompt_info = NULL;
        const char *password = NULL;
        PW_CB_DATA *cb_data = (PW_CB_DATA *) cb_tmp;

        if (cb_data) {
                if (cb_data->password)
                        password = cb_data->password;
                if (cb_data->prompt_info)
                        prompt_info = cb_data->prompt_info;
        }
        if (password) {
                res = strlen(password);
                if (res > bufsiz)
                        res = bufsiz;
                memcpy(buf, password, res);
                return res;
        }
        ui = UI_new_method(ui_method);
        if (ui) {
                int ok = 0;
                char *buff = NULL;
                int ui_flags = 0;
                char *prompt = NULL;

                prompt = UI_construct_prompt(ui, "pass phrase", prompt_info);

                ui_flags |= UI_INPUT_FLAG_DEFAULT_PWD;
                UI_ctrl(ui, UI_CTRL_PRINT_ERRORS, 1, 0, 0);

                if (ok >= 0)
                        ok = UI_add_input_string(ui, prompt, ui_flags, buf,
                            PW_MIN_LENGTH, bufsiz - 1);
                if (ok >= 0 && verify) {
                        buff = malloc(bufsiz);
                        ok = UI_add_verify_string(ui, prompt, ui_flags, buff,
                            PW_MIN_LENGTH, bufsiz - 1, buf);
                }
                if (ok >= 0)
                        do {
                                ok = UI_process(ui);
                        } while (ok < 0 &&
                            UI_ctrl(ui, UI_CTRL_IS_REDOABLE, 0, 0, 0));

                freezero(buff, (unsigned int) bufsiz);
                if (ok >= 0)
                        res = strlen(buf);
                if (ok == -1) {
                        BIO_printf(bio_err, "User interface error\n");
                        ERR_print_errors(bio_err);
                        explicit_bzero(buf, (unsigned int) bufsiz);
                        res = 0;
                }
                if (ok == -2) {
                        BIO_printf(bio_err, "aborted!\n");
                        explicit_bzero(buf, (unsigned int) bufsiz);
                        res = 0;
                }
                UI_free(ui);
                free(prompt);
        }
        return res;
}

static char *app_get_pass(BIO *err, char *arg, int keepbio);

int
app_passwd(BIO *err, char *arg1, char *arg2, char **pass1, char **pass2)
{
        int same;

        if (!arg2 || !arg1 || strcmp(arg1, arg2))
                same = 0;
        else
                same = 1;
        if (arg1) {
                *pass1 = app_get_pass(err, arg1, same);
                if (!*pass1)
                        return 0;
        } else if (pass1)
                *pass1 = NULL;
        if (arg2) {
                *pass2 = app_get_pass(err, arg2, same ? 2 : 0);
                if (!*pass2)
                        return 0;
        } else if (pass2)
                *pass2 = NULL;
        return 1;
}

static char *
app_get_pass(BIO *err, char *arg, int keepbio)
{
        char *tmp, tpass[APP_PASS_LEN];
        static BIO *pwdbio = NULL;
        const char *errstr = NULL;
        int i;

        if (!strncmp(arg, "pass:", 5))
                return strdup(arg + 5);
        if (!strncmp(arg, "env:", 4)) {
                tmp = getenv(arg + 4);
                if (!tmp) {
                        BIO_printf(err, "Can't read environment variable %s\n",
                            arg + 4);
                        return NULL;
                }
                return strdup(tmp);
        }
        if (!keepbio || !pwdbio) {
                if (!strncmp(arg, "file:", 5)) {
                        pwdbio = BIO_new_file(arg + 5, "r");
                        if (!pwdbio) {
                                BIO_printf(err, "Can't open file %s\n",
                                    arg + 5);
                                return NULL;
                        }
                } else if (!strncmp(arg, "fd:", 3)) {
                        BIO *btmp;
                        i = strtonum(arg + 3, 0, INT_MAX, &errstr);
                        if (errstr) {
                                BIO_printf(err,
                                    "Invalid file descriptor %s: %s\n",
                                    arg, errstr);
                                return NULL;
                        }
                        pwdbio = BIO_new_fd(i, BIO_NOCLOSE);
                        if (!pwdbio) {
                                BIO_printf(err,
                                    "Can't access file descriptor %s\n",
                                    arg + 3);
                                return NULL;
                        }
                        /*
                         * Can't do BIO_gets on an fd BIO so add a buffering
                         * BIO
                         */
                        btmp = BIO_new(BIO_f_buffer());
                        pwdbio = BIO_push(btmp, pwdbio);
                } else if (!strcmp(arg, "stdin")) {
                        pwdbio = BIO_new_fp(stdin, BIO_NOCLOSE);
                        if (!pwdbio) {
                                BIO_printf(err, "Can't open BIO for stdin\n");
                                return NULL;
                        }
                } else {
                        BIO_printf(err, "Invalid password argument \"%s\"\n",
                            arg);
                        return NULL;
                }
        }
        i = BIO_gets(pwdbio, tpass, APP_PASS_LEN);
        if (keepbio != 1) {
                BIO_free_all(pwdbio);
                pwdbio = NULL;
        }
        if (i <= 0) {
                BIO_printf(err, "Error reading password from BIO\n");
                return NULL;
        }
        tmp = strchr(tpass, '\n');
        if (tmp)
                *tmp = 0;
        return strdup(tpass);
}

int
add_oid_section(BIO *err, CONF *conf)
{
        char *p;
        STACK_OF(CONF_VALUE) *sktmp;
        CONF_VALUE *cnf;
        int i;

        if (!(p = NCONF_get_string(conf, NULL, "oid_section"))) {
                ERR_clear_error();
                return 1;
        }
        if (!(sktmp = NCONF_get_section(conf, p))) {
                BIO_printf(err, "problem loading oid section %s\n", p);
                return 0;
        }
        for (i = 0; i < sk_CONF_VALUE_num(sktmp); i++) {
                cnf = sk_CONF_VALUE_value(sktmp, i);
                if (OBJ_create(cnf->value, cnf->name, cnf->name) == NID_undef) {
                        BIO_printf(err, "problem creating object %s=%s\n",
                            cnf->name, cnf->value);
                        return 0;
                }
        }
        return 1;
}

static int
load_pkcs12(BIO *err, BIO *in, const char *desc, pem_password_cb *pem_cb,
    void *cb_data, EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca)
{
        const char *pass;
        char tpass[PEM_BUFSIZE];
        int len, ret = 0;
        PKCS12 *p12;

        p12 = d2i_PKCS12_bio(in, NULL);
        if (p12 == NULL) {
                BIO_printf(err, "Error loading PKCS12 file for %s\n", desc);
                goto die;
        }
        /* See if an empty password will do */
        if (PKCS12_verify_mac(p12, "", 0) || PKCS12_verify_mac(p12, NULL, 0))
                pass = "";
        else {
                if (!pem_cb)
                        pem_cb = password_callback;
                len = pem_cb(tpass, PEM_BUFSIZE, 0, cb_data);
                if (len < 0) {
                        BIO_printf(err, "Passpharse callback error for %s\n",
                            desc);
                        goto die;
                }
                if (len < PEM_BUFSIZE)
                        tpass[len] = 0;
                if (!PKCS12_verify_mac(p12, tpass, len)) {
                        BIO_printf(err,
                            "Mac verify error (wrong password?) in PKCS12 file for %s\n", desc);
                        goto die;
                }
                pass = tpass;
        }
        ret = PKCS12_parse(p12, pass, pkey, cert, ca);

 die:
        PKCS12_free(p12);
        return ret;
}

X509 *
load_cert(BIO *err, const char *file, int format, const char *pass,
    const char *cert_descrip)
{
        X509 *x = NULL;
        BIO *cert;

        if ((cert = BIO_new(BIO_s_file())) == NULL) {
                ERR_print_errors(err);
                goto end;
        }
        if (file == NULL) {
                setvbuf(stdin, NULL, _IONBF, 0);
                BIO_set_fp(cert, stdin, BIO_NOCLOSE);
        } else {
                if (BIO_read_filename(cert, file) <= 0) {
                        BIO_printf(err, "Error opening %s %s\n",
                            cert_descrip, file);
                        ERR_print_errors(err);
                        goto end;
                }
        }

        if (format == FORMAT_ASN1)
                x = d2i_X509_bio(cert, NULL);
        else if (format == FORMAT_PEM)
                x = PEM_read_bio_X509_AUX(cert, NULL, password_callback, NULL);
        else if (format == FORMAT_PKCS12) {
                if (!load_pkcs12(err, cert, cert_descrip, NULL, NULL,
                    NULL, &x, NULL))
                        goto end;
        } else {
                BIO_printf(err, "bad input format specified for %s\n",
                    cert_descrip);
                goto end;
        }

 end:
        if (x == NULL) {
                BIO_printf(err, "unable to load certificate\n");
                ERR_print_errors(err);
        }
        BIO_free(cert);
        return (x);
}

EVP_PKEY *
load_key(BIO *err, const char *file, int format, int maybe_stdin,
    const char *pass, const char *key_descrip)
{
        BIO *key = NULL;
        EVP_PKEY *pkey = NULL;
        PW_CB_DATA cb_data;

        cb_data.password = pass;
        cb_data.prompt_info = file;

        if (file == NULL && (!maybe_stdin)) {
                BIO_printf(err, "no keyfile specified\n");
                goto end;
        }
        key = BIO_new(BIO_s_file());
        if (key == NULL) {
                ERR_print_errors(err);
                goto end;
        }
        if (file == NULL && maybe_stdin) {
                setvbuf(stdin, NULL, _IONBF, 0);
                BIO_set_fp(key, stdin, BIO_NOCLOSE);
        } else if (BIO_read_filename(key, file) <= 0) {
                BIO_printf(err, "Error opening %s %s\n",
                    key_descrip, file);
                ERR_print_errors(err);
                goto end;
        }
        if (format == FORMAT_ASN1) {
                pkey = d2i_PrivateKey_bio(key, NULL);
        } else if (format == FORMAT_PEM) {
                pkey = PEM_read_bio_PrivateKey(key, NULL, password_callback, &cb_data);
        }
        else if (format == FORMAT_PKCS12) {
                if (!load_pkcs12(err, key, key_descrip, password_callback, &cb_data,
                    &pkey, NULL, NULL))
                        goto end;
        }
#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA) && !defined (OPENSSL_NO_RC4)
        else if (format == FORMAT_MSBLOB)
                pkey = b2i_PrivateKey_bio(key);
        else if (format == FORMAT_PVK)
                pkey = b2i_PVK_bio(key, password_callback,
                    &cb_data);
#endif
        else {
                BIO_printf(err, "bad input format specified for key file\n");
                goto end;
        }
 end:
        BIO_free(key);
        if (pkey == NULL) {
                BIO_printf(err, "unable to load %s\n", key_descrip);
                ERR_print_errors(err);
        }
        return (pkey);
}

EVP_PKEY *
load_pubkey(BIO *err, const char *file, int format, int maybe_stdin,
    const char *pass, const char *key_descrip)
{
        BIO *key = NULL;
        EVP_PKEY *pkey = NULL;
        PW_CB_DATA cb_data;

        cb_data.password = pass;
        cb_data.prompt_info = file;

        if (file == NULL && !maybe_stdin) {
                BIO_printf(err, "no keyfile specified\n");
                goto end;
        }
        key = BIO_new(BIO_s_file());
        if (key == NULL) {
                ERR_print_errors(err);
                goto end;
        }
        if (file == NULL && maybe_stdin) {
                setvbuf(stdin, NULL, _IONBF, 0);
                BIO_set_fp(key, stdin, BIO_NOCLOSE);
        } else if (BIO_read_filename(key, file) <= 0) {
                BIO_printf(err, "Error opening %s %s\n", key_descrip, file);
                ERR_print_errors(err);
                goto end;
        }
        if (format == FORMAT_ASN1) {
                pkey = d2i_PUBKEY_bio(key, NULL);
        }
        else if (format == FORMAT_ASN1RSA) {
                RSA *rsa;
                rsa = d2i_RSAPublicKey_bio(key, NULL);
                if (rsa) {
                        pkey = EVP_PKEY_new();
                        if (pkey)
                                EVP_PKEY_set1_RSA(pkey, rsa);
                        RSA_free(rsa);
                } else
                        pkey = NULL;
        } else if (format == FORMAT_PEMRSA) {
                RSA *rsa;
                rsa = PEM_read_bio_RSAPublicKey(key, NULL, password_callback, &cb_data);
                if (rsa) {
                        pkey = EVP_PKEY_new();
                        if (pkey)
                                EVP_PKEY_set1_RSA(pkey, rsa);
                        RSA_free(rsa);
                } else
                        pkey = NULL;
        }
        else if (format == FORMAT_PEM) {
                pkey = PEM_read_bio_PUBKEY(key, NULL, password_callback, &cb_data);
        }
#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
        else if (format == FORMAT_MSBLOB)
                pkey = b2i_PublicKey_bio(key);
#endif
        else {
                BIO_printf(err, "bad input format specified for key file\n");
                goto end;
        }

 end:
        BIO_free(key);
        if (pkey == NULL)
                BIO_printf(err, "unable to load %s\n", key_descrip);
        return (pkey);
}

static int
load_certs_crls(BIO *err, const char *file, int format, const char *pass,
    const char *desc, STACK_OF(X509) **pcerts,
    STACK_OF(X509_CRL) **pcrls)
{
        int i;
        BIO *bio;
        STACK_OF(X509_INFO) *xis = NULL;
        X509_INFO *xi;
        PW_CB_DATA cb_data;
        int rv = 0;

        cb_data.password = pass;
        cb_data.prompt_info = file;

        if (format != FORMAT_PEM) {
                BIO_printf(err, "bad input format specified for %s\n", desc);
                return 0;
        }
        if (file == NULL)
                bio = BIO_new_fp(stdin, BIO_NOCLOSE);
        else
                bio = BIO_new_file(file, "r");

        if (bio == NULL) {
                BIO_printf(err, "Error opening %s %s\n",
                    desc, file ? file : "stdin");
                ERR_print_errors(err);
                return 0;
        }
        xis = PEM_X509_INFO_read_bio(bio, NULL, password_callback, &cb_data);

        BIO_free(bio);

        if (pcerts) {
                *pcerts = sk_X509_new_null();
                if (!*pcerts)
                        goto end;
        }
        if (pcrls) {
                *pcrls = sk_X509_CRL_new_null();
                if (!*pcrls)
                        goto end;
        }
        for (i = 0; i < sk_X509_INFO_num(xis); i++) {
                xi = sk_X509_INFO_value(xis, i);
                if (xi->x509 && pcerts) {
                        if (!sk_X509_push(*pcerts, xi->x509))
                                goto end;
                        xi->x509 = NULL;
                }
                if (xi->crl && pcrls) {
                        if (!sk_X509_CRL_push(*pcrls, xi->crl))
                                goto end;
                        xi->crl = NULL;
                }
        }

        if (pcerts && sk_X509_num(*pcerts) > 0)
                rv = 1;

        if (pcrls && sk_X509_CRL_num(*pcrls) > 0)
                rv = 1;

 end:
        sk_X509_INFO_pop_free(xis, X509_INFO_free);

        if (rv == 0) {
                if (pcerts) {
                        sk_X509_pop_free(*pcerts, X509_free);
                        *pcerts = NULL;
                }
                if (pcrls) {
                        sk_X509_CRL_pop_free(*pcrls, X509_CRL_free);
                        *pcrls = NULL;
                }
                BIO_printf(err, "unable to load %s\n",
                    pcerts ? "certificates" : "CRLs");
                ERR_print_errors(err);
        }
        return rv;
}

STACK_OF(X509) *
load_certs(BIO *err, const char *file, int format, const char *pass,
    const char *desc)
{
        STACK_OF(X509) *certs;

        if (!load_certs_crls(err, file, format, pass, desc, &certs, NULL))
                return NULL;
        return certs;
}

STACK_OF(X509_CRL) *
load_crls(BIO *err, const char *file, int format, const char *pass,
    const char *desc)
{
        STACK_OF(X509_CRL) *crls;

        if (!load_certs_crls(err, file, format, pass, desc, NULL, &crls))
                return NULL;
        return crls;
}

#define X509V3_EXT_UNKNOWN_MASK         (0xfL << 16)
/* Return error for unknown extensions */
#define X509V3_EXT_DEFAULT              0
/* Print error for unknown extensions */
#define X509V3_EXT_ERROR_UNKNOWN        (1L << 16)
/* ASN1 parse unknown extensions */
#define X509V3_EXT_PARSE_UNKNOWN        (2L << 16)
/* BIO_dump unknown extensions */
#define X509V3_EXT_DUMP_UNKNOWN         (3L << 16)

#define X509_FLAG_CA (X509_FLAG_NO_ISSUER | X509_FLAG_NO_PUBKEY | \
                         X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION)

int
set_cert_ex(unsigned long *flags, const char *arg)
{
        static const NAME_EX_TBL cert_tbl[] = {
                {"compatible", X509_FLAG_COMPAT, 0xffffffffl},
                {"ca_default", X509_FLAG_CA, 0xffffffffl},
                {"no_header", X509_FLAG_NO_HEADER, 0},
                {"no_version", X509_FLAG_NO_VERSION, 0},
                {"no_serial", X509_FLAG_NO_SERIAL, 0},
                {"no_signame", X509_FLAG_NO_SIGNAME, 0},
                {"no_validity", X509_FLAG_NO_VALIDITY, 0},
                {"no_subject", X509_FLAG_NO_SUBJECT, 0},
                {"no_issuer", X509_FLAG_NO_ISSUER, 0},
                {"no_pubkey", X509_FLAG_NO_PUBKEY, 0},
                {"no_extensions", X509_FLAG_NO_EXTENSIONS, 0},
                {"no_sigdump", X509_FLAG_NO_SIGDUMP, 0},
                {"no_aux", X509_FLAG_NO_AUX, 0},
                {"no_attributes", X509_FLAG_NO_ATTRIBUTES, 0},
                {"ext_default", X509V3_EXT_DEFAULT, X509V3_EXT_UNKNOWN_MASK},
                {"ext_error", X509V3_EXT_ERROR_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
                {"ext_parse", X509V3_EXT_PARSE_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
                {"ext_dump", X509V3_EXT_DUMP_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
                {NULL, 0, 0}
        };
        return set_multi_opts(flags, arg, cert_tbl);
}

int
set_name_ex(unsigned long *flags, const char *arg)
{
        static const NAME_EX_TBL ex_tbl[] = {
                {"esc_2253", ASN1_STRFLGS_ESC_2253, 0},
                {"esc_ctrl", ASN1_STRFLGS_ESC_CTRL, 0},
                {"esc_msb", ASN1_STRFLGS_ESC_MSB, 0},
                {"use_quote", ASN1_STRFLGS_ESC_QUOTE, 0},
                {"utf8", ASN1_STRFLGS_UTF8_CONVERT, 0},
                {"ignore_type", ASN1_STRFLGS_IGNORE_TYPE, 0},
                {"show_type", ASN1_STRFLGS_SHOW_TYPE, 0},
                {"dump_all", ASN1_STRFLGS_DUMP_ALL, 0},
                {"dump_nostr", ASN1_STRFLGS_DUMP_UNKNOWN, 0},
                {"dump_der", ASN1_STRFLGS_DUMP_DER, 0},
                {"compat", XN_FLAG_COMPAT, 0xffffffffL},
                {"sep_comma_plus", XN_FLAG_SEP_COMMA_PLUS, XN_FLAG_SEP_MASK},
                {"sep_comma_plus_space", XN_FLAG_SEP_CPLUS_SPC, XN_FLAG_SEP_MASK},
                {"sep_semi_plus_space", XN_FLAG_SEP_SPLUS_SPC, XN_FLAG_SEP_MASK},
                {"sep_multiline", XN_FLAG_SEP_MULTILINE, XN_FLAG_SEP_MASK},
                {"dn_rev", XN_FLAG_DN_REV, 0},
                {"nofname", XN_FLAG_FN_NONE, XN_FLAG_FN_MASK},
                {"sname", XN_FLAG_FN_SN, XN_FLAG_FN_MASK},
                {"lname", XN_FLAG_FN_LN, XN_FLAG_FN_MASK},
                {"align", XN_FLAG_FN_ALIGN, 0},
                {"oid", XN_FLAG_FN_OID, XN_FLAG_FN_MASK},
                {"space_eq", XN_FLAG_SPC_EQ, 0},
                {"dump_unknown", XN_FLAG_DUMP_UNKNOWN_FIELDS, 0},
                {"RFC2253", XN_FLAG_RFC2253, 0xffffffffL},
                {"oneline", XN_FLAG_ONELINE, 0xffffffffL},
                {"multiline", XN_FLAG_MULTILINE, 0xffffffffL},
                {"ca_default", XN_FLAG_MULTILINE, 0xffffffffL},
                {NULL, 0, 0}
        };
        if (!set_multi_opts(flags, arg, ex_tbl))
                return 0;
        if (*flags != XN_FLAG_COMPAT && (*flags & XN_FLAG_SEP_MASK) == 0)
                *flags |= XN_FLAG_SEP_CPLUS_SPC;
        return 1;
}

int
set_ext_copy(int *copy_type, const char *arg)
{
        if (!strcasecmp(arg, "none"))
                *copy_type = EXT_COPY_NONE;
        else if (!strcasecmp(arg, "copy"))
                *copy_type = EXT_COPY_ADD;
        else if (!strcasecmp(arg, "copyall"))
                *copy_type = EXT_COPY_ALL;
        else
                return 0;
        return 1;
}

int
copy_extensions(X509 *x, X509_REQ *req, int copy_type)
{
        STACK_OF(X509_EXTENSION) *exts = NULL;
        X509_EXTENSION *ext, *tmpext;
        ASN1_OBJECT *obj;
        int i, idx, ret = 0;

        if (!x || !req || (copy_type == EXT_COPY_NONE))
                return 1;
        exts = X509_REQ_get_extensions(req);

        for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
                ext = sk_X509_EXTENSION_value(exts, i);
                obj = X509_EXTENSION_get_object(ext);
                idx = X509_get_ext_by_OBJ(x, obj, -1);
                /* Does extension exist? */
                if (idx != -1) {
                        /* If normal copy don't override existing extension */
                        if (copy_type == EXT_COPY_ADD)
                                continue;
                        /* Delete all extensions of same type */
                        do {
                                tmpext = X509_get_ext(x, idx);
                                X509_delete_ext(x, idx);
                                X509_EXTENSION_free(tmpext);
                                idx = X509_get_ext_by_OBJ(x, obj, -1);
                        } while (idx != -1);
                }
                if (!X509_add_ext(x, ext, -1))
                        goto end;
        }

        ret = 1;

 end:
        sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);

        return ret;
}

static int
set_multi_opts(unsigned long *flags, const char *arg,
    const NAME_EX_TBL *in_tbl)
{
        STACK_OF(CONF_VALUE) *vals;
        CONF_VALUE *val;
        int i, ret = 1;

        if (!arg)
                return 0;
        vals = X509V3_parse_list(arg);
        for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
                val = sk_CONF_VALUE_value(vals, i);
                if (!set_table_opts(flags, val->name, in_tbl))
                        ret = 0;
        }
        sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
        return ret;
}

static int
set_table_opts(unsigned long *flags, const char *arg,
    const NAME_EX_TBL *in_tbl)
{
        char c;
        const NAME_EX_TBL *ptbl;

        c = arg[0];
        if (c == '-') {
                c = 0;
                arg++;
        } else if (c == '+') {
                c = 1;
                arg++;
        } else
                c = 1;

        for (ptbl = in_tbl; ptbl->name; ptbl++) {
                if (!strcasecmp(arg, ptbl->name)) {
                        *flags &= ~ptbl->mask;
                        if (c)
                                *flags |= ptbl->flag;
                        else
                                *flags &= ~ptbl->flag;
                        return 1;
                }
        }
        return 0;
}

void
print_name(BIO *out, const char *title, X509_NAME *nm, unsigned long lflags)
{
        char *buf;
        char mline = 0;
        int indent = 0;

        if (title)
                BIO_puts(out, title);
        if ((lflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
                mline = 1;
                indent = 4;
        }
        if (lflags == XN_FLAG_COMPAT) {
                buf = X509_NAME_oneline(nm, 0, 0);
                BIO_puts(out, buf);
                BIO_puts(out, "\n");
                free(buf);
        } else {
                if (mline)
                        BIO_puts(out, "\n");
                X509_NAME_print_ex(out, nm, indent, lflags);
                BIO_puts(out, "\n");
        }
}

X509_STORE *
setup_verify(BIO *bp, char *CAfile, char *CApath)
{
        X509_STORE *store;
        X509_LOOKUP *lookup;

        if (!(store = X509_STORE_new()))
                goto end;
        lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
        if (lookup == NULL)
                goto end;
        if (CAfile) {
                if (!X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM)) {
                        BIO_printf(bp, "Error loading file %s\n", CAfile);
                        goto end;
                }
        } else
                X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);

        lookup = X509_STORE_add_lookup(store, X509_LOOKUP_hash_dir());
        if (lookup == NULL)
                goto end;
        if (CApath) {
                if (!X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM)) {
                        BIO_printf(bp, "Error loading directory %s\n", CApath);
                        goto end;
                }
        } else
                X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);

        ERR_clear_error();
        return store;

 end:
        X509_STORE_free(store);
        return NULL;
}

int
load_config(BIO *err, CONF *cnf)
{
        static int load_config_called = 0;

        if (load_config_called)
                return 1;
        load_config_called = 1;
        if (cnf == NULL)
                cnf = config;
        if (cnf == NULL)
                return 1;

        OPENSSL_config(NULL);

        if (CONF_modules_load(cnf, NULL, 0) <= 0) {
                BIO_printf(err, "Error configuring OpenSSL\n");
                ERR_print_errors(err);
                return 0;
        }
        return 1;
}

char *
make_config_name(void)
{
        const char *t = X509_get_default_cert_area();
        char *p;

        if (asprintf(&p, "%s/openssl.cnf", t) == -1)
                return NULL;
        return p;
}

static unsigned long
index_serial_hash(const OPENSSL_CSTRING *a)
{
        const char *n;

        n = a[DB_serial];
        while (*n == '0')
                n++;
        return (lh_strhash(n));
}

static int
index_serial_cmp(const OPENSSL_CSTRING *a, const OPENSSL_CSTRING *b)
{
        const char *aa, *bb;

        for (aa = a[DB_serial]; *aa == '0'; aa++)
                ;
        for (bb = b[DB_serial]; *bb == '0'; bb++)
                ;
        return (strcmp(aa, bb));
}

static int
index_name_qual(char **a)
{
        return (a[0][0] == 'V');
}

static unsigned long
index_name_hash(const OPENSSL_CSTRING *a)
{
        return (lh_strhash(a[DB_name]));
}

int
index_name_cmp(const OPENSSL_CSTRING *a, const OPENSSL_CSTRING *b)
{
        return (strcmp(a[DB_name], b[DB_name]));
}

static IMPLEMENT_LHASH_HASH_FN(index_serial, OPENSSL_CSTRING)
static IMPLEMENT_LHASH_COMP_FN(index_serial, OPENSSL_CSTRING)
static IMPLEMENT_LHASH_HASH_FN(index_name, OPENSSL_CSTRING)
static IMPLEMENT_LHASH_COMP_FN(index_name, OPENSSL_CSTRING)

BIGNUM *
load_serial(char *serialfile, int create, ASN1_INTEGER **retai)
{
        BIO *in = NULL;
        BIGNUM *ret = NULL;
        char buf[1024];
        ASN1_INTEGER *ai = NULL;

        ai = ASN1_INTEGER_new();
        if (ai == NULL)
                goto err;

        if ((in = BIO_new(BIO_s_file())) == NULL) {
                ERR_print_errors(bio_err);
                goto err;
        }
        if (BIO_read_filename(in, serialfile) <= 0) {
                if (!create) {
                        perror(serialfile);
                        goto err;
                } else {
                        ret = BN_new();
                        if (ret == NULL || !rand_serial(ret, ai))
                                BIO_printf(bio_err, "Out of memory\n");
                }
        } else {
                if (!a2i_ASN1_INTEGER(in, ai, buf, sizeof buf)) {
                        BIO_printf(bio_err, "unable to load number from %s\n",
                            serialfile);
                        goto err;
                }
                ret = ASN1_INTEGER_to_BN(ai, NULL);
                if (ret == NULL) {
                        BIO_printf(bio_err,
                            "error converting number from bin to BIGNUM\n");
                        goto err;
                }
        }

        if (ret && retai) {
                *retai = ai;
                ai = NULL;
        }

 err:
        BIO_free(in);
        ASN1_INTEGER_free(ai);
        return (ret);
}

int
save_serial(char *serialfile, char *suffix, BIGNUM *serial,
    ASN1_INTEGER **retai)
{
        char serialpath[PATH_MAX];
        BIO *out = NULL;
        int ret = 0, n;
        ASN1_INTEGER *ai = NULL;

        if (suffix == NULL)
                n = strlcpy(serialpath, serialfile, sizeof serialpath);
        else
                n = snprintf(serialpath, sizeof serialpath, "%s.%s",
                    serialfile, suffix);
        if (n < 0 || n >= sizeof(serialpath)) {
                BIO_printf(bio_err, "serial too long\n");
                goto err;
        }
        out = BIO_new(BIO_s_file());
        if (out == NULL) {
                ERR_print_errors(bio_err);
                goto err;
        }
        if (BIO_write_filename(out, serialpath) <= 0) {
                perror(serialfile);
                goto err;
        }
        if ((ai = BN_to_ASN1_INTEGER(serial, NULL)) == NULL) {
                BIO_printf(bio_err,
                    "error converting serial to ASN.1 format\n");
                goto err;
        }
        i2a_ASN1_INTEGER(out, ai);
        BIO_puts(out, "\n");
        ret = 1;
        if (retai) {
                *retai = ai;
                ai = NULL;
        }

 err:
        BIO_free_all(out);
        ASN1_INTEGER_free(ai);
        return (ret);
}

int
rotate_serial(char *serialfile, char *new_suffix, char *old_suffix)
{
        char opath[PATH_MAX], npath[PATH_MAX];

        if (snprintf(npath, sizeof npath, "%s.%s", serialfile,
            new_suffix) >= sizeof npath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }

        if (snprintf(opath, sizeof opath, "%s.%s", serialfile,
            old_suffix) >= sizeof opath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }

        if (rename(serialfile, opath) == -1 &&
            errno != ENOENT && errno != ENOTDIR) {
                BIO_printf(bio_err, "unable to rename %s to %s\n",
                    serialfile, opath);
                perror("reason");
                goto err;
        }


        if (rename(npath, serialfile) == -1) {
                BIO_printf(bio_err, "unable to rename %s to %s\n",
                    npath, serialfile);
                perror("reason");
                if (rename(opath, serialfile) == -1) {
                        BIO_printf(bio_err, "unable to rename %s to %s\n",
                            opath, serialfile);
                        perror("reason");
                }
                goto err;
        }
        return 1;

 err:
        return 0;
}

int
rand_serial(BIGNUM *b, ASN1_INTEGER *ai)
{
        BIGNUM *btmp;
        int ret = 0;

        if (b)
                btmp = b;
        else
                btmp = BN_new();

        if (!btmp)
                return 0;

        if (!BN_pseudo_rand(btmp, SERIAL_RAND_BITS, 0, 0))
                goto error;
        if (ai && !BN_to_ASN1_INTEGER(btmp, ai))
                goto error;

        ret = 1;

 error:
        if (b != btmp)
                BN_free(btmp);

        return ret;
}

CA_DB *
load_index(char *dbfile, DB_ATTR *db_attr)
{
        CA_DB *retdb = NULL;
        TXT_DB *tmpdb = NULL;
        BIO *in = BIO_new(BIO_s_file());
        CONF *dbattr_conf = NULL;
        char attrpath[PATH_MAX];
        long errorline = -1;

        if (in == NULL) {
                ERR_print_errors(bio_err);
                goto err;
        }
        if (BIO_read_filename(in, dbfile) <= 0) {
                perror(dbfile);
                BIO_printf(bio_err, "unable to open '%s'\n", dbfile);
                goto err;
        }
        if ((tmpdb = TXT_DB_read(in, DB_NUMBER)) == NULL)
                goto err;

        if (snprintf(attrpath, sizeof attrpath, "%s.attr", dbfile)
            >= sizeof attrpath) {
                BIO_printf(bio_err, "attr filename too long\n");
                goto err;
        }

        dbattr_conf = NCONF_new(NULL);
        if (NCONF_load(dbattr_conf, attrpath, &errorline) <= 0) {
                if (errorline > 0) {
                        BIO_printf(bio_err,
                            "error on line %ld of db attribute file '%s'\n",
                            errorline, attrpath);
                        goto err;
                } else {
                        NCONF_free(dbattr_conf);
                        dbattr_conf = NULL;
                }
        }
        if ((retdb = malloc(sizeof(CA_DB))) == NULL) {
                fprintf(stderr, "Out of memory\n");
                goto err;
        }
        retdb->db = tmpdb;
        tmpdb = NULL;
        if (db_attr)
                retdb->attributes = *db_attr;
        else {
                retdb->attributes.unique_subject = 1;
        }

        if (dbattr_conf) {
                char *p = NCONF_get_string(dbattr_conf, NULL, "unique_subject");
                if (p) {
                        retdb->attributes.unique_subject = parse_yesno(p, 1);
                }
        }

 err:
        NCONF_free(dbattr_conf);
        TXT_DB_free(tmpdb);
        BIO_free_all(in);
        return retdb;
}

int
index_index(CA_DB *db)
{
        if (!TXT_DB_create_index(db->db, DB_serial, NULL,
            LHASH_HASH_FN(index_serial), LHASH_COMP_FN(index_serial))) {
                BIO_printf(bio_err,
                    "error creating serial number index:(%ld,%ld,%ld)\n",
                    db->db->error, db->db->arg1, db->db->arg2);
                return 0;
        }
        if (db->attributes.unique_subject &&
            !TXT_DB_create_index(db->db, DB_name, index_name_qual,
            LHASH_HASH_FN(index_name), LHASH_COMP_FN(index_name))) {
                BIO_printf(bio_err, "error creating name index:(%ld,%ld,%ld)\n",
                    db->db->error, db->db->arg1, db->db->arg2);
                return 0;
        }
        return 1;
}

int
save_index(const char *file, const char *suffix, CA_DB *db)
{
        char attrpath[PATH_MAX], dbfile[PATH_MAX];
        BIO *out;
        int ret = 0;

        if ((out = BIO_new(BIO_s_file())) == NULL) {
                ERR_print_errors(bio_err);
                goto err;
        }
        if (snprintf(attrpath, sizeof attrpath, "%s.attr.%s",
            file, suffix) >= sizeof attrpath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }
        if (snprintf(dbfile, sizeof dbfile, "%s.%s",
            file, suffix) >= sizeof dbfile) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }

        if (BIO_write_filename(out, dbfile) <= 0) {
                perror(dbfile);
                BIO_printf(bio_err, "unable to open '%s'\n", dbfile);
                goto err;
        }

        if (TXT_DB_write(out, db->db) <= 0)
                goto err;

        BIO_free(out);
        if ((out = BIO_new(BIO_s_file())) == NULL) {
                ERR_print_errors(bio_err);
                goto err;
        }

        if (BIO_write_filename(out, attrpath) <= 0) {
                perror(attrpath);
                BIO_printf(bio_err, "unable to open '%s'\n", attrpath);
                goto err;
        }
        if (BIO_printf(out, "unique_subject = %s\n",
            db->attributes.unique_subject ? "yes" : "no") <= 0)
                goto err;

        ret = 1;

 err:
        BIO_free(out);

        return ret;
}

int
rotate_index(const char *dbfile, const char *new_suffix, const char *old_suffix)
{
        char attrpath[PATH_MAX], nattrpath[PATH_MAX], oattrpath[PATH_MAX];
        char dbpath[PATH_MAX], odbpath[PATH_MAX];

        if (snprintf(attrpath, sizeof attrpath, "%s.attr",
            dbfile) >= sizeof attrpath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }
        if (snprintf(nattrpath, sizeof nattrpath, "%s.attr.%s",
            dbfile, new_suffix) >= sizeof nattrpath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }
        if (snprintf(oattrpath, sizeof oattrpath, "%s.attr.%s",
            dbfile, old_suffix) >= sizeof oattrpath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }
        if (snprintf(dbpath, sizeof dbpath, "%s.%s",
            dbfile, new_suffix) >= sizeof dbpath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }
        if (snprintf(odbpath, sizeof odbpath, "%s.%s",
            dbfile, old_suffix) >= sizeof odbpath) {
                BIO_printf(bio_err, "file name too long\n");
                goto err;
        }

        if (rename(dbfile, odbpath) == -1 && errno != ENOENT && errno != ENOTDIR) {
                BIO_printf(bio_err, "unable to rename %s to %s\n",
                    dbfile, odbpath);
                perror("reason");
                goto err;
        }

        if (rename(dbpath, dbfile) == -1) {
                BIO_printf(bio_err, "unable to rename %s to %s\n",
                    dbpath, dbfile);
                perror("reason");
                if (rename(odbpath, dbfile) == -1) {
                        BIO_printf(bio_err, "unable to rename %s to %s\n",
                            odbpath, dbfile);
                        perror("reason");
                }
                goto err;
        }

        if (rename(attrpath, oattrpath) == -1 && errno != ENOENT && errno != ENOTDIR) {
                BIO_printf(bio_err, "unable to rename %s to %s\n",
                    attrpath, oattrpath);
                perror("reason");
                if (rename(dbfile, dbpath) == -1) {
                        BIO_printf(bio_err, "unable to rename %s to %s\n",
                            dbfile, dbpath);
                        perror("reason");
                }
                if (rename(odbpath, dbfile) == -1) {
                        BIO_printf(bio_err, "unable to rename %s to %s\n",
                            odbpath, dbfile);
                        perror("reason");
                }
                goto err;
        }

        if (rename(nattrpath, attrpath) == -1) {
                BIO_printf(bio_err, "unable to rename %s to %s\n",
                    nattrpath, attrpath);
                perror("reason");
                if (rename(oattrpath, attrpath) == -1) {
                        BIO_printf(bio_err, "unable to rename %s to %s\n",
                            oattrpath, attrpath);
                        perror("reason");
                }
                if (rename(dbfile, dbpath) == -1) {
                        BIO_printf(bio_err, "unable to rename %s to %s\n",
                            dbfile, dbpath);
                        perror("reason");
                }
                if (rename(odbpath, dbfile) == -1) {
                        BIO_printf(bio_err, "unable to rename %s to %s\n",
                            odbpath, dbfile);
                        perror("reason");
                }
                goto err;
        }
        return 1;

 err:
        return 0;
}

void
free_index(CA_DB *db)
{
        if (db) {
                TXT_DB_free(db->db);
                free(db);
        }
}

int
parse_yesno(const char *str, int def)
{
        int ret = def;

        if (str) {
                switch (*str) {
                case 'f':       /* false */
                case 'F':       /* FALSE */
                case 'n':       /* no */
                case 'N':       /* NO */
                case '0':       /* 0 */
                        ret = 0;
                        break;
                case 't':       /* true */
                case 'T':       /* TRUE */
                case 'y':       /* yes */
                case 'Y':       /* YES */
                case '1':       /* 1 */
                        ret = 1;
                        break;
                default:
                        ret = def;
                        break;
                }
        }
        return ret;
}

/*
 * subject is expected to be in the format /type0=value0/type1=value1/type2=...
 * where characters may be escaped by \
 */
X509_NAME *
parse_name(char *subject, long chtype, int multirdn)
{
        X509_NAME *name = NULL;
        size_t buflen, max_ne;
        char **ne_types, **ne_values;
        char *buf, *bp, *sp;
        int i, nid, ne_num = 0;
        int *mval;

        /*
         * Buffer to copy the types and values into. Due to escaping the
         * copy can only become shorter.
         */
        buflen = strlen(subject) + 1;
        buf = malloc(buflen);

        /* Maximum number of name elements. */
        max_ne = buflen / 2 + 1;
        ne_types = reallocarray(NULL, max_ne, sizeof(char *));
        ne_values = reallocarray(NULL, max_ne, sizeof(char *));
        mval = reallocarray(NULL, max_ne, sizeof(int));

        if (buf == NULL || ne_types == NULL || ne_values == NULL ||
            mval == NULL) {
                BIO_printf(bio_err, "malloc error\n");
                goto error;
        }

        bp = buf;
        sp = subject;

        if (*subject != '/') {
                BIO_printf(bio_err, "Subject does not start with '/'.\n");
                goto error;
        }

        /* Skip leading '/'. */
        sp++;

        /* No multivalued RDN by default. */
        mval[ne_num] = 0;

        while (*sp) {
                /* Collect type. */
                ne_types[ne_num] = bp;
                while (*sp) {
                        /* is there anything to escape in the type...? */
                        if (*sp == '\\') {
                                if (*++sp)
                                        *bp++ = *sp++;
                                else {
                                        BIO_printf(bio_err, "escape character "
                                            "at end of string\n");
                                        goto error;
                                }
                        } else if (*sp == '=') {
                                sp++;
                                *bp++ = '\0';
                                break;
                        } else
                                *bp++ = *sp++;
                }
                if (!*sp) {
                        BIO_printf(bio_err, "end of string encountered while "
                            "processing type of subject name element #%d\n",
                            ne_num);
                        goto error;
                }
                ne_values[ne_num] = bp;
                while (*sp) {
                        if (*sp == '\\') {
                                if (*++sp)
                                        *bp++ = *sp++;
                                else {
                                        BIO_printf(bio_err, "escape character "
                                            "at end of string\n");
                                        goto error;
                                }
                        } else if (*sp == '/') {
                                sp++;
                                /* no multivalued RDN by default */
                                mval[ne_num + 1] = 0;
                                break;
                        } else if (*sp == '+' && multirdn) {
                                /* a not escaped + signals a multivalued RDN */
                                sp++;
                                mval[ne_num + 1] = -1;
                                break;
                        } else
                                *bp++ = *sp++;
                }
                *bp++ = '\0';
                ne_num++;
        }

        if ((name = X509_NAME_new()) == NULL)
                goto error;

        for (i = 0; i < ne_num; i++) {
                if ((nid = OBJ_txt2nid(ne_types[i])) == NID_undef) {
                        BIO_printf(bio_err,
                            "Subject Attribute %s has no known NID, skipped\n",
                            ne_types[i]);
                        continue;
                }
                if (!*ne_values[i]) {
                        BIO_printf(bio_err, "No value provided for Subject "
                            "Attribute %s, skipped\n", ne_types[i]);
                        continue;
                }
                if (!X509_NAME_add_entry_by_NID(name, nid, chtype,
                    (unsigned char *) ne_values[i], -1, -1, mval[i]))
                        goto error;
        }
        goto done;

 error:
        X509_NAME_free(name);
        name = NULL;

 done:
        free(ne_values);
        free(ne_types);
        free(mval);
        free(buf);

        return name;
}

int
args_verify(char ***pargs, int *pargc, int *badarg, BIO *err,
    X509_VERIFY_PARAM **pm)
{
        ASN1_OBJECT *otmp = NULL;
        unsigned long flags = 0;
        int i;
        int purpose = 0, depth = -1;
        char **oldargs = *pargs;
        char *arg = **pargs, *argn = (*pargs)[1];
        time_t at_time = 0;
        const char *errstr = NULL;

        if (!strcmp(arg, "-policy")) {
                if (!argn)
                        *badarg = 1;
                else {
                        otmp = OBJ_txt2obj(argn, 0);
                        if (!otmp) {
                                BIO_printf(err, "Invalid Policy \"%s\"\n",
                                    argn);
                                *badarg = 1;
                        }
                }
                (*pargs)++;
        } else if (strcmp(arg, "-purpose") == 0) {
                const X509_PURPOSE *xptmp;
                if (!argn)
                        *badarg = 1;
                else {
                        i = X509_PURPOSE_get_by_sname(argn);
                        if (i < 0) {
                                BIO_printf(err, "unrecognized purpose\n");
                                *badarg = 1;
                        } else {
                                xptmp = X509_PURPOSE_get0(i);
                                purpose = X509_PURPOSE_get_id(xptmp);
                        }
                }
                (*pargs)++;
        } else if (strcmp(arg, "-verify_depth") == 0) {
                if (!argn)
                        *badarg = 1;
                else {
                        depth = strtonum(argn, 1, INT_MAX, &errstr);
                        if (errstr) {
                                BIO_printf(err, "invalid depth %s: %s\n",
                                    argn, errstr);
                                *badarg = 1;
                        }
                }
                (*pargs)++;
        } else if (strcmp(arg, "-attime") == 0) {
                if (!argn)
                        *badarg = 1;
                else {
                        long long timestamp;
                        /*
                         * interpret the -attime argument as seconds since
                         * Epoch
                         */
                        if (sscanf(argn, "%lli", &timestamp) != 1) {
                                BIO_printf(bio_err,
                                    "Error parsing timestamp %s\n",
                                    argn);
                                *badarg = 1;
                        }
                        /* XXX 2038 truncation */
                        at_time = (time_t) timestamp;
                }
                (*pargs)++;
        } else if (!strcmp(arg, "-ignore_critical"))
                flags |= X509_V_FLAG_IGNORE_CRITICAL;
        else if (!strcmp(arg, "-issuer_checks"))
                flags |= X509_V_FLAG_CB_ISSUER_CHECK;
        else if (!strcmp(arg, "-crl_check"))
                flags |= X509_V_FLAG_CRL_CHECK;
        else if (!strcmp(arg, "-crl_check_all"))
                flags |= X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL;
        else if (!strcmp(arg, "-policy_check"))
                flags |= X509_V_FLAG_POLICY_CHECK;
        else if (!strcmp(arg, "-explicit_policy"))
                flags |= X509_V_FLAG_EXPLICIT_POLICY;
        else if (!strcmp(arg, "-legacy_verify"))
                flags |= X509_V_FLAG_LEGACY_VERIFY;
        else if (!strcmp(arg, "-inhibit_any"))
                flags |= X509_V_FLAG_INHIBIT_ANY;
        else if (!strcmp(arg, "-inhibit_map"))
                flags |= X509_V_FLAG_INHIBIT_MAP;
        else if (!strcmp(arg, "-x509_strict"))
                flags |= X509_V_FLAG_X509_STRICT;
        else if (!strcmp(arg, "-extended_crl"))
                flags |= X509_V_FLAG_EXTENDED_CRL_SUPPORT;
        else if (!strcmp(arg, "-use_deltas"))
                flags |= X509_V_FLAG_USE_DELTAS;
        else if (!strcmp(arg, "-policy_print"))
                flags |= X509_V_FLAG_NOTIFY_POLICY;
        else if (!strcmp(arg, "-check_ss_sig"))
                flags |= X509_V_FLAG_CHECK_SS_SIGNATURE;
        else
                return 0;

        if (*badarg) {
                X509_VERIFY_PARAM_free(*pm);
                *pm = NULL;
                goto end;
        }
        if (!*pm && !(*pm = X509_VERIFY_PARAM_new())) {
                *badarg = 1;
                goto end;
        }
        if (otmp) {
                X509_VERIFY_PARAM_add0_policy(*pm, otmp);
                otmp = NULL;
        }
        if (flags)
                X509_VERIFY_PARAM_set_flags(*pm, flags);

        if (purpose)
                X509_VERIFY_PARAM_set_purpose(*pm, purpose);

        if (depth >= 0)
                X509_VERIFY_PARAM_set_depth(*pm, depth);

        if (at_time)
                X509_VERIFY_PARAM_set_time(*pm, at_time);

 end:
        (*pargs)++;

        if (pargc)
                *pargc -= *pargs - oldargs;

        ASN1_OBJECT_free(otmp);
        return 1;
}

/* Read whole contents of a BIO into an allocated memory buffer and
 * return it.
 */

int
bio_to_mem(unsigned char **out, int maxlen, BIO *in)
{
        BIO *mem;
        int len, ret;
        unsigned char tbuf[1024];

        mem = BIO_new(BIO_s_mem());
        if (!mem)
                return -1;
        for (;;) {
                if ((maxlen != -1) && maxlen < 1024)
                        len = maxlen;
                else
                        len = 1024;
                len = BIO_read(in, tbuf, len);
                if (len <= 0)
                        break;
                if (BIO_write(mem, tbuf, len) != len) {
                        BIO_free(mem);
                        return -1;
                }
                maxlen -= len;

                if (maxlen == 0)
                        break;
        }
        ret = BIO_get_mem_data(mem, (char **) out);
        BIO_set_flags(mem, BIO_FLAGS_MEM_RDONLY);
        BIO_free(mem);
        return ret;
}

int
pkey_ctrl_string(EVP_PKEY_CTX *ctx, char *value)
{
        int rv;
        char *stmp, *vtmp = NULL;

        if (value == NULL)
                return -1;
        stmp = strdup(value);
        if (!stmp)
                return -1;
        vtmp = strchr(stmp, ':');
        if (vtmp) {
                *vtmp = 0;
                vtmp++;
        }
        rv = EVP_PKEY_CTX_ctrl_str(ctx, stmp, vtmp);
        free(stmp);

        return rv;
}

/*
 * next_protos_parse parses a comma separated list of strings into a string
 * in a format suitable for passing to SSL_CTX_set_next_protos_advertised.
 *   outlen: (output) set to the length of the resulting buffer on success.
 *   err: (maybe NULL) on failure, an error message line is written to this BIO.
 *   in: a NUL terminated string like "abc,def,ghi"
 *
 *   returns: a malloced buffer or NULL on failure.
 */
unsigned char *
next_protos_parse(unsigned short *outlen, const char *in)
{
        size_t len;
        unsigned char *out;
        size_t i, start = 0;

        len = strlen(in);
        if (len >= 65535)
                return NULL;

        out = malloc(strlen(in) + 1);
        if (!out)
                return NULL;

        for (i = 0; i <= len; ++i) {
                if (i == len || in[i] == ',') {
                        if (i - start > 255) {
                                free(out);
                                return NULL;
                        }
                        out[start] = i - start;
                        start = i + 1;
                } else
                        out[i + 1] = in[i];
        }

        *outlen = len + 1;
        return out;
}

int
app_isdir(const char *name)
{
        struct stat st;

        if (stat(name, &st) == 0)
                return S_ISDIR(st.st_mode);
        return -1;
}

#define OPTION_WIDTH 18

void
options_usage(const struct option *opts)
{
        const char *p, *q;
        char optstr[32];
        int i;

        for (i = 0; opts[i].name != NULL; i++) {
                if (opts[i].desc == NULL)
                        continue;

                snprintf(optstr, sizeof(optstr), "-%s %s", opts[i].name,
                    (opts[i].argname != NULL) ? opts[i].argname : "");
                fprintf(stderr, " %-*s", OPTION_WIDTH, optstr);
                if (strlen(optstr) > OPTION_WIDTH)
                        fprintf(stderr, "\n %-*s", OPTION_WIDTH, "");

                p = opts[i].desc;
                while ((q = strchr(p, '\n')) != NULL) {
                        fprintf(stderr, " %.*s", (int)(q - p), p);
                        fprintf(stderr, "\n %-*s", OPTION_WIDTH, "");
                        p = q + 1;
                }
                fprintf(stderr, " %s\n", p);
        }
}

int
options_parse(int argc, char **argv, const struct option *opts, char **unnamed,
    int *argsused)
{
        const char *errstr;
        const struct option *opt;
        long long val;
        char *arg, *p;
        int fmt, used;
        int ord = 0;
        int i, j;

        if (unnamed != NULL)
                *unnamed = NULL;

        for (i = 1; i < argc; i++) {
                p = arg = argv[i];

                /* Single unnamed argument (without leading hyphen). */
                if (*p++ != '-') {
                        if (argsused != NULL)
                                goto done;
                        if (unnamed == NULL)
                                goto unknown;
                        if (*unnamed != NULL)
                                goto toomany;
                        *unnamed = arg;
                        continue;
                }

                /* End of named options (single hyphen). */
                if (*p == '\0') {
                        if (++i >= argc)
                                goto done;
                        if (argsused != NULL)
                                goto done;
                        if (unnamed != NULL && i == argc - 1) {
                                if (*unnamed != NULL)
                                        goto toomany;
                                *unnamed = argv[i];
                                continue;
                        }
                        goto unknown;
                }

                /* See if there is a matching option... */
                for (j = 0; opts[j].name != NULL; j++) {
                        if (strcmp(p, opts[j].name) == 0)
                                break;
                }
                opt = &opts[j];
                if (opt->name == NULL && opt->type == 0)
                        goto unknown;

                if (opt->type == OPTION_ARG ||
                    opt->type == OPTION_ARG_FORMAT ||
                    opt->type == OPTION_ARG_FUNC ||
                    opt->type == OPTION_ARG_INT ||
                    opt->type == OPTION_ARG_LONG ||
                    opt->type == OPTION_ARG_TIME) {
                        if (++i >= argc) {
                                fprintf(stderr, "missing %s argument for -%s\n",
                                    opt->argname, opt->name);
                                return (1);
                        }
                }

                switch (opt->type) {
                case OPTION_ARG:
                        *opt->opt.arg = argv[i];
                        break;

                case OPTION_ARGV_FUNC:
                        if (opt->opt.argvfunc(argc - i, &argv[i], &used) != 0)
                                return (1);
                        i += used - 1;
                        break;

                case OPTION_ARG_FORMAT:
                        fmt = str2fmt(argv[i]);
                        if (fmt == FORMAT_UNDEF) {
                                fprintf(stderr, "unknown %s '%s' for -%s\n",
                                    opt->argname, argv[i], opt->name);
                                return (1);
                        }
                        *opt->opt.value = fmt;
                        break;

                case OPTION_ARG_FUNC:
                        if (opt->opt.argfunc(argv[i]) != 0)
                                return (1);
                        break;

                case OPTION_ARG_INT:
                        val = strtonum(argv[i], 0, INT_MAX, &errstr);
                        if (errstr != NULL) {
                                fprintf(stderr, "%s %s argument for -%s\n",
                                    errstr, opt->argname, opt->name);
                                return (1);
                        }
                        *opt->opt.value = (int)val;
                        break;

                case OPTION_ARG_LONG:
                        val = strtonum(argv[i], 0, LONG_MAX, &errstr);
                        if (errstr != NULL) {
                                fprintf(stderr, "%s %s argument for -%s\n",
                                    errstr, opt->argname, opt->name);
                                return (1);
                        }
                        *opt->opt.lvalue = (long)val;
                        break;

                case OPTION_ARG_TIME:
                        val = strtonum(argv[i], 0, LLONG_MAX, &errstr);
                        if (errstr != NULL) {
                                fprintf(stderr, "%s %s argument for -%s\n",
                                    errstr, opt->argname, opt->name);
                                return (1);
                        }
                        *opt->opt.tvalue = val;
                        break;

                case OPTION_DISCARD:
                        break;

                case OPTION_FUNC:
                        if (opt->opt.func() != 0)
                                return (1);
                        break;

                case OPTION_FLAG:
                        *opt->opt.flag = 1;
                        break;

                case OPTION_FLAG_ORD:
                        *opt->opt.flag = ++ord;
                        break;

                case OPTION_VALUE:
                        *opt->opt.value = opt->value;
                        break;

                case OPTION_VALUE_AND:
                        *opt->opt.value &= opt->value;
                        break;

                case OPTION_VALUE_OR:
                        *opt->opt.value |= opt->value;
                        break;

                case OPTION_UL_VALUE_OR:
                        *opt->opt.ulvalue |= opt->ulvalue;
                        break;

                case OPTION_ORDER:
                        *opt->opt.order = ++(*opt->order);
                        break;

                default:
                        fprintf(stderr, "option %s - unknown type %i\n",
                            opt->name, opt->type);
                        return (1);
                }
        }

 done:
        if (argsused != NULL)
                *argsused = i;

        return (0);

 toomany:
        fprintf(stderr, "too many arguments\n");
        return (1);

 unknown:
        fprintf(stderr, "unknown option '%s'\n", arg);
        return (1);
}

void
show_cipher(const OBJ_NAME *name, void *arg)
{
        int *n = arg;

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

        fprintf(stderr, " -%-24s%s", name->name, (++*n % 3 != 0 ? "" : "\n"));
}