text: /* 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.]
   */
  
  #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>
  
  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);
  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 */
  	};
  
  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;
  
  	ld=(BY_DIR *)ctx->method_data;
  
  	switch (cmd)
  		{
  	case X509_L_ADD_DIR:
  		if (argl == X509_FILETYPE_DEFAULT)
  			{
  			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
  				{
  				dir=(char *)Getenv(X509_get_default_cert_dir_env());
  				ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
  				}
  			}
  		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 (;;)
  		{
  		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 (strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
  					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;
  		p++;
  		}
  	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 (;;)
  			{
  			sprintf(b->data,"%s/%08lx.%s%d",ctx->dirs[i],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);
  	}
  
  