/* crypto/x509/by_dir.c */

/* 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.]

 */

 /*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include <time.h>

#include <errno.h>

#include "cryptlib.h"

#ifndef NO_SYS_TYPES_H

# include <sys/types.h>

#endif

#ifdef MAC_OS_pre_X

# include <stat.h>

#else

# include <sys/stat.h>

#endif

#include <openssl/lhash.h>

#include <openssl/x509.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

typedef struct lookup_dir_st

	{

	BUF_MEM *buffer;

	int num_dirs;

	char **dirs;

	int *dirs_type;

	int num_dirs_alloced;

	} BY_DIR;

static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,

	char **ret);

static int new_dir(X509_LOOKUP *lu);

static void free_dir(X509_LOOKUP *lu);

static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);

static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,

	X509_OBJECT *ret);

#ifndef EMULATOR	

X509_LOOKUP_METHOD x509_dir_lookup=

	{

	"Load certs from files in a directory",

	new_dir,		/* new */

	free_dir,		/* free */

	NULL, 			/* init */

	NULL,			/* shutdown */

	dir_ctrl,		/* ctrl */

	get_cert_by_subject,	/* get_by_subject */

	NULL,			/* get_by_issuer_serial */

	NULL,			/* get_by_fingerprint */

	NULL,			/* get_by_alias */

	};

#else

GET_GLOBAL_VAR_FROM_TLS(x509_dir_lookup,by_dir,X509_LOOKUP_METHOD)

#define x509_dir_lookup (*GET_WSD_VAR_NAME(x509_dir_lookup,by_dir, g)())

const X509_LOOKUP_METHOD temp_g_x509_dir_lookup=

	{

	"Load certs from files in a directory",

	new_dir,		/* new */

	free_dir,		/* free */

	NULL, 			/* init */

	NULL,			/* shutdown */

	dir_ctrl,		/* ctrl */

	get_cert_by_subject,	/* get_by_subject */

	NULL,			/* get_by_issuer_serial */

	NULL,			/* get_by_fingerprint */

	NULL,			/* get_by_alias */

	};

#endif	

EXPORT_C X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)

	{

	return(&x509_dir_lookup);

	}

static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,

	     char **retp)

	{

	int ret=0;

	BY_DIR *ld;

	char *dir = NULL;

	ld=(BY_DIR *)ctx->method_data;

	switch (cmd)

		{

	case X509_L_ADD_DIR:

		if (argl == X509_FILETYPE_DEFAULT)

			{

			dir=(char *)Getenv(X509_get_default_cert_dir_env());

			if (dir)

				ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);

			else

				ret=add_cert_dir(ld,X509_get_default_cert_dir(),

					X509_FILETYPE_PEM);

			if (!ret)

				{

				X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);

				}

			}

		else

			ret=add_cert_dir(ld,argp,(int)argl);

		break;

		}

	return(ret);

	}

static int new_dir(X509_LOOKUP *lu)

	{

	BY_DIR *a;

	if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)

		return(0);

	if ((a->buffer=BUF_MEM_new()) == NULL)

		{

		OPENSSL_free(a);

		return(0);

		}

	a->num_dirs=0;

	a->dirs=NULL;

	a->dirs_type=NULL;

	a->num_dirs_alloced=0;

	lu->method_data=(char *)a;

	return(1);

	}

static void free_dir(X509_LOOKUP *lu)

	{

	BY_DIR *a;

	int i;

	a=(BY_DIR *)lu->method_data;

	for (i=0; i<a->num_dirs; i++)

		if (a->dirs[i] != NULL) OPENSSL_free(a->dirs[i]);

	if (a->dirs != NULL) OPENSSL_free(a->dirs);

	if (a->dirs_type != NULL) OPENSSL_free(a->dirs_type);

	if (a->buffer != NULL) BUF_MEM_free(a->buffer);

	OPENSSL_free(a);

	}

static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)

	{

	int j,len;

	int *ip;

	const char *s,*ss,*p;

	char **pp;

	if (dir == NULL || !*dir)

	    {

	    X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);

	    return 0;

	    }

	s=dir;

	p=s;

	for (;;p++)

		{

		if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))

			{

			ss=s;

			s=p+1;

			len=(int)(p-ss);

			if (len == 0) continue;

			for (j=0; j<ctx->num_dirs; j++)

				if (strlen(ctx->dirs[j]) == (size_t)len &&

				    strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)

					break;

			if (j<ctx->num_dirs)

					continue;

			if (ctx->num_dirs_alloced < (ctx->num_dirs+1))

				{

				ctx->num_dirs_alloced+=10;

				pp=(char **)OPENSSL_malloc(ctx->num_dirs_alloced*

					sizeof(char *));

				ip=(int *)OPENSSL_malloc(ctx->num_dirs_alloced*

					sizeof(int));

				if ((pp == NULL) || (ip == NULL))

					{

					X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);

					return(0);

					}

				memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*

					sizeof(char *));

				memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*

					sizeof(int));

				if (ctx->dirs != NULL)

					OPENSSL_free(ctx->dirs);

				if (ctx->dirs_type != NULL)

					OPENSSL_free(ctx->dirs_type);

				ctx->dirs=pp;

				ctx->dirs_type=ip;

				}

			ctx->dirs_type[ctx->num_dirs]=type;

			ctx->dirs[ctx->num_dirs]=(char *)OPENSSL_malloc((unsigned int)len+1);

			if (ctx->dirs[ctx->num_dirs] == NULL) return(0);

			strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);

			ctx->dirs[ctx->num_dirs][len]='\0';

			ctx->num_dirs++;

			}

		if (*p == '\0') break;

		}

	return(1);

	}

static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,

	     X509_OBJECT *ret)

	{

	BY_DIR *ctx;

	union	{

		struct	{

			X509 st_x509;

			X509_CINF st_x509_cinf;

			} x509;

		struct	{

			X509_CRL st_crl;

			X509_CRL_INFO st_crl_info;

			} crl;

		} data;

	int ok=0;

	int i,j,k;

	unsigned long h;

	BUF_MEM *b=NULL;

	struct stat st;

	X509_OBJECT stmp,*tmp;

	const char *postfix="";

	if (name == NULL) return(0);

	stmp.type=type;

	if (type == X509_LU_X509)

		{

		data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;

		data.x509.st_x509_cinf.subject=name;

		stmp.data.x509= &data.x509.st_x509;

		postfix="";

		}

	else if (type == X509_LU_CRL)

		{

		data.crl.st_crl.crl= &data.crl.st_crl_info;

		data.crl.st_crl_info.issuer=name;

		stmp.data.crl= &data.crl.st_crl;

		postfix="r";

		}

	else

		{

		X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);

		goto finish;

		}

	if ((b=BUF_MEM_new()) == NULL)

		{

		X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);

		goto finish;

		}

	ctx=(BY_DIR *)xl->method_data;

	h=X509_NAME_hash(name);

	for (i=0; i<ctx->num_dirs; i++)

		{

		j=strlen(ctx->dirs[i])+1+8+6+1+1;

		if (!BUF_MEM_grow(b,j))

			{

			X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);

			goto finish;

			}

		k=0;

		for (;;)

			{

			char c = '/';

#ifdef OPENSSL_SYS_VMS

			c = ctx->dirs[i][strlen(ctx->dirs[i])-1];

			if (c != ':' && c != '>' && c != ']')

				{

				/* If no separator is present, we assume the

				   directory specifier is a logical name, and

				   add a colon.  We really should use better

				   VMS routines for merging things like this,

				   but this will do for now...

				   -- Richard Levitte */

				c = ':';

				}

			else

				{

				c = '\0';

				}

#endif

			if (c == '\0')

				{

				/* This is special.  When c == '\0', no

				   directory separator should be added. */

				BIO_snprintf(b->data,b->max,

					"%s%08lx.%s%d",ctx->dirs[i],h,

					postfix,k);

				}

			else

				{

				BIO_snprintf(b->data,b->max,

					"%s%c%08lx.%s%d",ctx->dirs[i],c,h,

					postfix,k);

				}

			k++;

			if (stat(b->data,&st) < 0)

				break;

			/* found one. */

			if (type == X509_LU_X509)

				{

				if ((X509_load_cert_file(xl,b->data,

					ctx->dirs_type[i])) == 0)

					break;

				}

			else if (type == X509_LU_CRL)

				{

				if ((X509_load_crl_file(xl,b->data,

					ctx->dirs_type[i])) == 0)

					break;

				}

			/* else case will caught higher up */

			}

		/* we have added it to the cache so now pull

		 * it out again */

		CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);

		j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);

		if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);

		else tmp = NULL;

		CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);

		if (tmp != NULL)

			{

			ok=1;

			ret->type=tmp->type;

			memcpy(&ret->data,&tmp->data,sizeof(ret->data));

			/* If we were going to up the reference count,

			 * we would need to do it on a perl 'type'

			 * basis */

	/*		CRYPTO_add(&tmp->data.x509->references,1,

				CRYPTO_LOCK_X509);*/

			goto finish;

			}

		}

finish:

	if (b != NULL) BUF_MEM_free(b);

	return(ok);

	}