by_dir.c
/* 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>
#ifdef _WIN32
# define stat _stat
#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);
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) {
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_w_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_w_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);
}
