/* $OpenBSD: by_file.c,v 1.20 2016/03/11 07:08:45 mmcc 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/err.h>
#include <openssl/pem.h>
#include <openssl/lhash.h>
#include <openssl/x509.h>

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

static X509_LOOKUP_METHOD x509_file_lookup = {
	.name = "Load file into cache",
	.new_item = NULL,
	.free = NULL,
	.init = NULL,
	.shutdown = NULL,
	.ctrl = by_file_ctrl,
	.get_by_subject = NULL,
	.get_by_issuer_serial = NULL,
	.get_by_fingerprint = NULL,
	.get_by_alias = NULL,
};

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

static int
by_file_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
    char **ret)
{
	int ok = 0;

	switch (cmd) {
	case X509_L_FILE_LOAD:
		if (argl == X509_FILETYPE_DEFAULT) {
			ok = (X509_load_cert_crl_file(ctx,
			    X509_get_default_cert_file(),
			    X509_FILETYPE_PEM) != 0);
			if (!ok) {
				X509err(X509_F_BY_FILE_CTRL,
				    X509_R_LOADING_DEFAULTS);
			}
		} else {
			if (argl == X509_FILETYPE_PEM)
				ok = (X509_load_cert_crl_file(ctx, argp,
				    X509_FILETYPE_PEM) != 0);
			else
				ok = (X509_load_cert_file(ctx,
				    argp, (int)argl) != 0);
		}
		break;
	}
	return (ok);
}

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;

	if (file == NULL)
		return (1);
	in = BIO_new(BIO_s_file_internal());

	if ((in == NULL) || (BIO_read_filename(in, file) <= 0)) {
		X509err(X509_F_X509_LOAD_CERT_FILE, ERR_R_SYS_LIB);
		goto err;
	}

	if (type == X509_FILETYPE_PEM) {
		for (;;) {
			x = PEM_read_bio_X509_AUX(in, NULL, 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 {
					X509err(X509_F_X509_LOAD_CERT_FILE,
					    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) {
			X509err(X509_F_X509_LOAD_CERT_FILE, ERR_R_ASN1_LIB);
			goto err;
		}
		i = X509_STORE_add_cert(ctx->store_ctx, x);
		if (!i)
			goto err;
		ret = i;
	} else {
		X509err(X509_F_X509_LOAD_CERT_FILE, X509_R_BAD_X509_FILETYPE);
		goto err;
	}
err:
	X509_free(x);
	BIO_free(in);
	return (ret);
}

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;

	if (file == NULL)
		return (1);
	in = BIO_new(BIO_s_file_internal());

	if ((in == NULL) || (BIO_read_filename(in, file) <= 0)) {
		X509err(X509_F_X509_LOAD_CRL_FILE, ERR_R_SYS_LIB);
		goto err;
	}

	if (type == X509_FILETYPE_PEM) {
		for (;;) {
			x = PEM_read_bio_X509_CRL(in, NULL, 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 {
					X509err(X509_F_X509_LOAD_CRL_FILE,
					    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) {
			X509err(X509_F_X509_LOAD_CRL_FILE, ERR_R_ASN1_LIB);
			goto err;
		}
		i = X509_STORE_add_crl(ctx->store_ctx, x);
		if (!i)
			goto err;
		ret = i;
	} else {
		X509err(X509_F_X509_LOAD_CRL_FILE, X509_R_BAD_X509_FILETYPE);
		goto err;
	}
err:
	if (x != NULL)
		X509_CRL_free(x);
	BIO_free(in);
	return (ret);
}

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) {
		X509err(X509_F_X509_LOAD_CERT_CRL_FILE, ERR_R_SYS_LIB);
		return 0;
	}
	inf = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
	BIO_free(in);
	if (!inf) {
		X509err(X509_F_X509_LOAD_CERT_CRL_FILE, 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++;
		}
	}
	sk_X509_INFO_pop_free(inf, X509_INFO_free);
	return count;
}