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pineappleEA
2020-12-28 15:15:37 +00:00
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commit 78b48028e1
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422
externals/libressl/crypto/x509/by_dir.c vendored Executable file
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/* $OpenBSD: by_dir.c,v 1.39 2018/08/05 14:17:12 bcook 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 <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <openssl/opensslconf.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/x509.h>
# include <sys/stat.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);
static X509_LOOKUP_METHOD x509_dir_lookup = {
.name = "Load certs from files in a directory",
.new_item = new_dir,
.free = free_dir,
.init = NULL,
.shutdown = NULL,
.ctrl = dir_ctrl,
.get_by_subject = get_cert_by_subject,
.get_by_issuer_serial = NULL,
.get_by_fingerprint = NULL,
.get_by_alias = NULL,
};
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;
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) {
X509error(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 = malloc(sizeof(BY_DIR))) == NULL)
return (0);
if ((a->buffer = BUF_MEM_new()) == NULL) {
free(a);
return (0);
}
a->dirs = NULL;
lu->method_data = (char *)a;
return (1);
}
static void
by_dir_hash_free(BY_DIR_HASH *hash)
{
free(hash);
}
static int
by_dir_hash_cmp(const BY_DIR_HASH * const *a,
const BY_DIR_HASH * const *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)
{
free(ent->dir);
if (ent->hashes)
sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
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);
free(a);
}
static int
add_cert_dir(BY_DIR *ctx, const char *dir, int type)
{
int j;
const char *s, *ss, *p;
ptrdiff_t len;
if (dir == NULL || !*dir) {
X509error(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) == (size_t)len &&
strncmp(ent->dir, ss, (size_t)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) {
X509error(ERR_R_MALLOC_FAILURE);
return 0;
}
}
ent = malloc(sizeof(BY_DIR_ENTRY));
if (!ent) {
X509error(ERR_R_MALLOC_FAILURE);
return 0;
}
ent->dir_type = type;
ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
ent->dir = strndup(ss, (size_t)len);
if (!ent->dir || !ent->hashes) {
X509error(ERR_R_MALLOC_FAILURE);
by_dir_entry_free(ent);
return 0;
}
if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) {
X509error(ERR_R_MALLOC_FAILURE);
by_dir_entry_free(ent);
return 0;
}
}
} while (*p++ != '\0');
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;
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 {
X509error(X509_R_WRONG_LOOKUP_TYPE);
goto finish;
}
if ((b = BUF_MEM_new()) == NULL) {
X509error(ERR_R_BUF_LIB);
goto finish;
}
ctx = (BY_DIR *)xl->method_data;
h = X509_NAME_hash(name);
for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) {
BY_DIR_ENTRY *ent;
int 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)) {
X509error(ERR_R_MALLOC_FAILURE);
goto finish;
}
if (type == X509_LU_CRL) {
htmp.hash = h;
CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
if (idx >= 0) {
hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
k = hent->suffix;
} else {
hent = NULL;
k = 0;
}
CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
} else {
k = 0;
hent = NULL;
}
for (;;) {
(void) snprintf(b->data, b->max, "%s/%08lx.%s%d",
ent->dir, h, postfix, k);
{
struct stat st;
if (stat(b->data, &st) < 0)
break;
}
/* 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_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 a CRL, update the last file suffix added for this */
if (type == X509_LU_CRL) {
CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
/*
* Look for entry again in case another thread added
* an entry first.
*/
if (!hent) {
htmp.hash = h;
idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
if (idx >= 0)
hent = sk_BY_DIR_HASH_value(
ent->hashes, idx);
}
if (!hent) {
hent = malloc(sizeof(BY_DIR_HASH));
if (!hent) {
X509error(ERR_R_MALLOC_FAILURE);
CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
ok = 0;
goto finish;
}
hent->hash = h;
hent->suffix = k;
if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) {
X509error(ERR_R_MALLOC_FAILURE);
CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
free(hent);
ok = 0;
goto finish;
}
} else if (hent->suffix < k)
hent->suffix = k;
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);
}