/* 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 <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <openssl/buf.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/mem.h>
#include <openssl/thread.h>
#include <openssl/x509.h>
#include "../internal.h"
typedef struct lookup_dir_hashes_st
{
unsigned long hash;
int suffix;
} BY_DIR_HASH;
typedef struct lookup_dir_entry_st
{
char *dir;
int dir_type;
STACK_OF(BY_DIR_HASH) *hashes;
} BY_DIR_ENTRY;
typedef struct lookup_dir_st
{
BUF_MEM *buffer;
STACK_OF(BY_DIR_ENTRY) *dirs;
} BY_DIR;
DECLARE_STACK_OF(BY_DIR_HASH)
DECLARE_STACK_OF(BY_DIR_ENTRY)
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 = 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)
{
OPENSSL_PUT_ERROR(X509, 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->dirs=NULL;
lu->method_data=(char *)a;
return(1);
}
static void by_dir_hash_free(BY_DIR_HASH *hash)
{
OPENSSL_free(hash);
}
static int by_dir_hash_cmp(const BY_DIR_HASH **a,
const BY_DIR_HASH **b)
{
if ((*a)->hash > (*b)->hash)
return 1;
if ((*a)->hash < (*b)->hash)
return -1;
return 0;
}
static void by_dir_entry_free(BY_DIR_ENTRY *ent)
{
if (ent->dir)
OPENSSL_free(ent->dir);
if (ent->hashes)
sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
OPENSSL_free(ent);
}
static void free_dir(X509_LOOKUP *lu)
{
BY_DIR *a;
a=(BY_DIR *)lu->method_data;
if (a->dirs != NULL)
sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
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)
{
size_t j,len;
const char *s,*ss,*p;
if (dir == NULL || !*dir)
{
OPENSSL_PUT_ERROR(X509, add_cert_dir, X509_R_INVALID_DIRECTORY);
return 0;
}
s=dir;
p=s;
do
{
if ((*p == ':') || (*p == '\0'))
{
BY_DIR_ENTRY *ent;
ss=s;
s=p+1;
len=p-ss;
if (len == 0) continue;
for (j=0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++)
{
ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
if (strlen(ent->dir) == len &&
strncmp(ent->dir,ss,len) == 0)
break;
}
if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
continue;
if (ctx->dirs == NULL)
{
ctx->dirs = sk_BY_DIR_ENTRY_new_null();
if (!ctx->dirs)
{
OPENSSL_PUT_ERROR(X509, add_cert_dir, ERR_R_MALLOC_FAILURE);
return 0;
}
}
ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY));
if (!ent)
return 0;
ent->dir_type = type;
ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
ent->dir = OPENSSL_malloc(len+1);
if (!ent->dir || !ent->hashes)
{
by_dir_entry_free(ent);
return 0;
}
strncpy(ent->dir,ss,len);
ent->dir[len] = '\0';
if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent))
{
by_dir_entry_free(ent);
return 0;
}
}
} while (*p++ != '\0');
return 1;
}
/* g_ent_hashes_lock protects the |hashes| member of all |BY_DIR_ENTRY|
* objects. */
static struct CRYPTO_STATIC_MUTEX g_ent_hashes_lock = CRYPTO_STATIC_MUTEX_INIT;
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;
size_t i;
int j,k;
unsigned long h;
unsigned long hash_array[2];
int hash_index;
BUF_MEM *b=NULL;
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
{
OPENSSL_PUT_ERROR(X509, get_cert_by_subject, X509_R_WRONG_LOOKUP_TYPE);
goto finish;
}
if ((b=BUF_MEM_new()) == NULL)
{
OPENSSL_PUT_ERROR(X509, get_cert_by_subject, ERR_R_BUF_LIB);
goto finish;
}
ctx=(BY_DIR *)xl->method_data;
hash_array[0]=X509_NAME_hash(name);
hash_array[1]=X509_NAME_hash_old(name);
for (hash_index=0; hash_index < 2; ++hash_index)
{
h=hash_array[hash_index];
for (i=0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++)
{
BY_DIR_ENTRY *ent;
size_t idx;
BY_DIR_HASH htmp, *hent;
ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
j=strlen(ent->dir)+1+8+6+1+1;
if (!BUF_MEM_grow(b,j))
{
OPENSSL_PUT_ERROR(X509, get_cert_by_subject, ERR_R_MALLOC_FAILURE);
goto finish;
}
if (type == X509_LU_CRL && ent->hashes)
{
htmp.hash = h;
CRYPTO_STATIC_MUTEX_lock_read(&g_ent_hashes_lock);
if (sk_BY_DIR_HASH_find(ent->hashes, &idx, &htmp))
{
hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
k = hent->suffix;
}
else
{
hent = NULL;
k=0;
}
CRYPTO_STATIC_MUTEX_unlock(&g_ent_hashes_lock);
}
else
{
k = 0;
hent = NULL;
}
for (;;)
{
char c = '/';
#ifdef OPENSSL_SYS_VMS
c = ent->dir[strlen(ent->dir)-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",ent->dir,h,
postfix,k);
}
else
{
BIO_snprintf(b->data,b->max,
"%s%c%08lx.%s%d",ent->dir,c,h,
postfix,k);
}
#ifndef OPENSSL_NO_POSIX_IO
#ifdef _WIN32
#define stat _stat
#endif
{
struct stat st;
if (stat(b->data,&st) < 0)
break;
}
#endif
/* found one. */
if (type == X509_LU_X509)
{
if ((X509_load_cert_file(xl,b->data,
ent->dir_type)) == 0)
break;
}
else if (type == X509_LU_CRL)
{
if ((X509_load_crl_file(xl,b->data,
ent->dir_type)) == 0)
break;
}
/* else case will caught higher up */
k++;
}
/* we have added it to the cache so now pull
* it out again */
CRYPTO_MUTEX_lock_write(&xl->store_ctx->objs_lock);
tmp = NULL;
if (sk_X509_OBJECT_find(xl->store_ctx->objs, &idx, &stmp)) {
tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,idx);
}
CRYPTO_MUTEX_unlock(&xl->store_ctx->objs_lock);
/* If a CRL, update the last file suffix added for this */
if (type == X509_LU_CRL)
{
CRYPTO_STATIC_MUTEX_lock_write(&g_ent_hashes_lock);
/* Look for entry again in case another thread added
* an entry first.
*/
if (!hent)
{
htmp.hash = h;
if (sk_BY_DIR_HASH_find(ent->hashes, &idx, &htmp))
hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
}
if (!hent)
{
hent = OPENSSL_malloc(sizeof(BY_DIR_HASH));
if (hent == NULL)
{
CRYPTO_STATIC_MUTEX_unlock(&g_ent_hashes_lock);
ok = 0;
goto finish;
}
hent->hash = h;
hent->suffix = k;
if (!sk_BY_DIR_HASH_push(ent->hashes, hent))
{
CRYPTO_STATIC_MUTEX_unlock(&g_ent_hashes_lock);
OPENSSL_free(hent);
ok = 0;
goto finish;
}
}
else if (hent->suffix < k)
hent->suffix = k;
CRYPTO_STATIC_MUTEX_unlock(&g_ent_hashes_lock);
}
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);
}