/* $OpenBSD: by_file.c,v 1.32 2025/05/10 05:54:39 tb 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 <errno.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>

#include <openssl/buffer.h>
#include <openssl/pem.h>
#include <openssl/x509.h>

#include "err_local.h"
#include "x509_local.h"

static int by_file_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
    long argl, char **ret);

static const X509_LOOKUP_METHOD x509_file_lookup = {
        .name = "Load file into cache",
        .new_item = NULL,
        .free = NULL,
        .ctrl = by_file_ctrl,
        .get_by_subject = NULL,
};

const X509_LOOKUP_METHOD *
X509_LOOKUP_file(void)
{
        return &x509_file_lookup;
}
LCRYPTO_ALIAS(X509_LOOKUP_file);

static int
by_file_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
    char **ret)
{
        const char *file = argp;
        int type = argl;

        if (cmd != X509_L_FILE_LOAD)
                return 0;

        if (argl == X509_FILETYPE_DEFAULT) {
                file = X509_get_default_cert_file();
                type = X509_FILETYPE_PEM;
        }
        if (X509_load_cert_crl_file(ctx, file, type) != 0)
                return 1;
        if (argl == X509_FILETYPE_DEFAULT)
                X509error(X509_R_LOADING_DEFAULTS);

        return 0;
}

int
X509_load_cert_file(X509_LOOKUP *ctx, const char *file, int type)
{
        int ret = 0;
        BIO *in = NULL;
        int i, count = 0;
        X509 *x = NULL;

        in = BIO_new(BIO_s_file());

        if ((in == NULL) || (BIO_read_filename(in, file) <= 0)) {
                X509error(ERR_R_SYS_LIB);
                goto err;
        }

        if (type == X509_FILETYPE_PEM) {
                for (;;) {
                        x = PEM_read_bio_X509_AUX(in, NULL, NULL, "");
                        if (x == NULL) {
                                if ((ERR_GET_REASON(ERR_peek_last_error()) ==
                                    PEM_R_NO_START_LINE) && (count > 0)) {
                                        ERR_clear_error();
                                        break;
                                } else {
                                        X509error(ERR_R_PEM_LIB);
                                        goto err;
                                }
                        }
                        i = X509_STORE_add_cert(ctx->store_ctx, x);
                        if (!i)
                                goto err;
                        count++;
                        X509_free(x);
                        x = NULL;
                }
                ret = count;
        } else if (type == X509_FILETYPE_ASN1) {
                x = d2i_X509_bio(in, NULL);
                if (x == NULL) {
                        X509error(ERR_R_ASN1_LIB);
                        goto err;
                }
                i = X509_STORE_add_cert(ctx->store_ctx, x);
                if (!i)
                        goto err;
                ret = i;
        } else {
                X509error(X509_R_BAD_X509_FILETYPE);
                goto err;
        }
err:
        X509_free(x);
        BIO_free(in);
        return ret;
}
LCRYPTO_ALIAS(X509_load_cert_file);

int
X509_load_crl_file(X509_LOOKUP *ctx, const char *file, int type)
{
        int ret = 0;
        BIO *in = NULL;
        int i, count = 0;
        X509_CRL *x = NULL;

        in = BIO_new(BIO_s_file());

        if ((in == NULL) || (BIO_read_filename(in, file) <= 0)) {
                X509error(ERR_R_SYS_LIB);
                goto err;
        }

        if (type == X509_FILETYPE_PEM) {
                for (;;) {
                        x = PEM_read_bio_X509_CRL(in, NULL, NULL, "");
                        if (x == NULL) {
                                if ((ERR_GET_REASON(ERR_peek_last_error()) ==
                                    PEM_R_NO_START_LINE) && (count > 0)) {
                                        ERR_clear_error();
                                        break;
                                } else {
                                        X509error(ERR_R_PEM_LIB);
                                        goto err;
                                }
                        }
                        i = X509_STORE_add_crl(ctx->store_ctx, x);
                        if (!i)
                                goto err;
                        count++;
                        X509_CRL_free(x);
                        x = NULL;
                }
                ret = count;
        } else if (type == X509_FILETYPE_ASN1) {
                x = d2i_X509_CRL_bio(in, NULL);
                if (x == NULL) {
                        X509error(ERR_R_ASN1_LIB);
                        goto err;
                }
                i = X509_STORE_add_crl(ctx->store_ctx, x);
                if (!i)
                        goto err;
                ret = i;
        } else {
                X509error(X509_R_BAD_X509_FILETYPE);
                goto err;
        }
err:
        X509_CRL_free(x);
        BIO_free(in);
        return ret;
}
LCRYPTO_ALIAS(X509_load_crl_file);

int
X509_load_cert_crl_file(X509_LOOKUP *ctx, const char *file, int type)
{
        STACK_OF(X509_INFO) *inf;
        X509_INFO *itmp;
        BIO *in;
        int i, count = 0;

        if (type != X509_FILETYPE_PEM)
                return X509_load_cert_file(ctx, file, type);
        in = BIO_new_file(file, "r");
        if (!in) {
                X509error(ERR_R_SYS_LIB);
                return 0;
        }
        inf = PEM_X509_INFO_read_bio(in, NULL, NULL, "");
        BIO_free(in);
        if (!inf) {
                X509error(ERR_R_PEM_LIB);
                return 0;
        }
        for (i = 0; i < sk_X509_INFO_num(inf); i++) {
                itmp = sk_X509_INFO_value(inf, i);
                if (itmp->x509) {
                        X509_STORE_add_cert(ctx->store_ctx, itmp->x509);
                        count++;
                }
                if (itmp->crl) {
                        X509_STORE_add_crl(ctx->store_ctx, itmp->crl);
                        count++;
                }
        }
        if (count == 0)
                X509error(X509_R_NO_CERTIFICATE_OR_CRL_FOUND);
        sk_X509_INFO_pop_free(inf, X509_INFO_free);
        return count;
}
LCRYPTO_ALIAS(X509_load_cert_crl_file);