ref: 009439541d2c6e8af2596f8fb1b4df85861fd212
dir: /third_party/boringssl/src/crypto/x509/x509_lu.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 <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/thread.h>
#include <openssl/x509.h>
#include "../internal.h"
#include "internal.h"
static int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
X509_NAME *name);
static X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
int type, X509_NAME *name);
static X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
X509_OBJECT *x);
static int X509_OBJECT_up_ref_count(X509_OBJECT *a);
static X509_LOOKUP *X509_LOOKUP_new(const X509_LOOKUP_METHOD *method,
X509_STORE *store);
static int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
X509_OBJECT *ret);
static X509_LOOKUP *X509_LOOKUP_new(const X509_LOOKUP_METHOD *method,
X509_STORE *store) {
X509_LOOKUP *ret = OPENSSL_zalloc(sizeof(X509_LOOKUP));
if (ret == NULL) {
return NULL;
}
ret->method = method;
ret->store_ctx = store;
if (method->new_item != NULL && !method->new_item(ret)) {
OPENSSL_free(ret);
return NULL;
}
return ret;
}
void X509_LOOKUP_free(X509_LOOKUP *ctx) {
if (ctx == NULL) {
return;
}
if (ctx->method != NULL && ctx->method->free != NULL) {
(*ctx->method->free)(ctx);
}
OPENSSL_free(ctx);
}
int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
char **ret) {
if (ctx->method == NULL) {
return -1;
}
if (ctx->method->ctrl != NULL) {
return ctx->method->ctrl(ctx, cmd, argc, argl, ret);
} else {
return 1;
}
}
static int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
X509_OBJECT *ret) {
if (ctx->method == NULL || ctx->method->get_by_subject == NULL) {
return 0;
}
// Note |get_by_subject| leaves |ret| in an inconsistent state. It has
// pointers to an |X509| or |X509_CRL|, but has not bumped the refcount yet.
// For now, the caller is expected to fix this, but ideally we'd fix the
// |X509_LOOKUP| convention itself.
return ctx->method->get_by_subject(ctx, type, name, ret) > 0;
}
static int x509_object_cmp(const X509_OBJECT *a, const X509_OBJECT *b) {
int ret = a->type - b->type;
if (ret) {
return ret;
}
switch (a->type) {
case X509_LU_X509:
return X509_subject_name_cmp(a->data.x509, b->data.x509);
case X509_LU_CRL:
return X509_CRL_cmp(a->data.crl, b->data.crl);
default:
// abort();
return 0;
}
}
static int x509_object_cmp_sk(const X509_OBJECT *const *a,
const X509_OBJECT *const *b) {
return x509_object_cmp(*a, *b);
}
X509_STORE *X509_STORE_new(void) {
X509_STORE *ret = OPENSSL_zalloc(sizeof(X509_STORE));
if (ret == NULL) {
return NULL;
}
ret->references = 1;
CRYPTO_MUTEX_init(&ret->objs_lock);
ret->objs = sk_X509_OBJECT_new(x509_object_cmp_sk);
ret->get_cert_methods = sk_X509_LOOKUP_new_null();
ret->param = X509_VERIFY_PARAM_new();
if (ret->objs == NULL ||
ret->get_cert_methods == NULL ||
ret->param == NULL) {
X509_STORE_free(ret);
return NULL;
}
return ret;
}
int X509_STORE_up_ref(X509_STORE *store) {
CRYPTO_refcount_inc(&store->references);
return 1;
}
void X509_STORE_free(X509_STORE *vfy) {
if (vfy == NULL) {
return;
}
if (!CRYPTO_refcount_dec_and_test_zero(&vfy->references)) {
return;
}
CRYPTO_MUTEX_cleanup(&vfy->objs_lock);
sk_X509_LOOKUP_pop_free(vfy->get_cert_methods, X509_LOOKUP_free);
sk_X509_OBJECT_pop_free(vfy->objs, X509_OBJECT_free);
X509_VERIFY_PARAM_free(vfy->param);
OPENSSL_free(vfy);
}
X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, const X509_LOOKUP_METHOD *m) {
STACK_OF(X509_LOOKUP) *sk = v->get_cert_methods;
for (size_t i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
X509_LOOKUP *lu = sk_X509_LOOKUP_value(sk, i);
if (m == lu->method) {
return lu;
}
}
X509_LOOKUP *lu = X509_LOOKUP_new(m, v);
if (lu == NULL || !sk_X509_LOOKUP_push(v->get_cert_methods, lu)) {
X509_LOOKUP_free(lu);
return NULL;
}
return lu;
}
int X509_STORE_CTX_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
X509_OBJECT *ret) {
X509_STORE *ctx = vs->ctx;
X509_OBJECT stmp;
CRYPTO_MUTEX_lock_write(&ctx->objs_lock);
X509_OBJECT *tmp = X509_OBJECT_retrieve_by_subject(ctx->objs, type, name);
CRYPTO_MUTEX_unlock_write(&ctx->objs_lock);
if (tmp == NULL || type == X509_LU_CRL) {
for (size_t i = 0; i < sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) {
X509_LOOKUP *lu = sk_X509_LOOKUP_value(ctx->get_cert_methods, i);
if (X509_LOOKUP_by_subject(lu, type, name, &stmp)) {
tmp = &stmp;
break;
}
}
if (tmp == NULL) {
return 0;
}
}
// TODO(crbug.com/boringssl/685): This should call
// |X509_OBJECT_free_contents|.
ret->type = tmp->type;
ret->data = tmp->data;
X509_OBJECT_up_ref_count(ret);
return 1;
}
static int x509_store_add(X509_STORE *ctx, void *x, int is_crl) {
if (x == NULL) {
return 0;
}
X509_OBJECT *const obj = X509_OBJECT_new();
if (obj == NULL) {
return 0;
}
if (is_crl) {
obj->type = X509_LU_CRL;
obj->data.crl = (X509_CRL *)x;
} else {
obj->type = X509_LU_X509;
obj->data.x509 = (X509 *)x;
}
X509_OBJECT_up_ref_count(obj);
CRYPTO_MUTEX_lock_write(&ctx->objs_lock);
int ret = 1;
int added = 0;
// Duplicates are silently ignored
if (!X509_OBJECT_retrieve_match(ctx->objs, obj)) {
ret = added = (sk_X509_OBJECT_push(ctx->objs, obj) != 0);
}
CRYPTO_MUTEX_unlock_write(&ctx->objs_lock);
if (!added) {
X509_OBJECT_free(obj);
}
return ret;
}
int X509_STORE_add_cert(X509_STORE *ctx, X509 *x) {
return x509_store_add(ctx, x, /*is_crl=*/0);
}
int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x) {
return x509_store_add(ctx, x, /*is_crl=*/1);
}
X509_OBJECT *X509_OBJECT_new(void) {
return OPENSSL_zalloc(sizeof(X509_OBJECT));
}
void X509_OBJECT_free(X509_OBJECT *obj) {
if (obj == NULL) {
return;
}
X509_OBJECT_free_contents(obj);
OPENSSL_free(obj);
}
static int X509_OBJECT_up_ref_count(X509_OBJECT *a) {
switch (a->type) {
case X509_LU_X509:
X509_up_ref(a->data.x509);
break;
case X509_LU_CRL:
X509_CRL_up_ref(a->data.crl);
break;
}
return 1;
}
void X509_OBJECT_free_contents(X509_OBJECT *a) {
switch (a->type) {
case X509_LU_X509:
X509_free(a->data.x509);
break;
case X509_LU_CRL:
X509_CRL_free(a->data.crl);
break;
}
OPENSSL_memset(a, 0, sizeof(X509_OBJECT));
}
int X509_OBJECT_get_type(const X509_OBJECT *a) { return a->type; }
X509 *X509_OBJECT_get0_X509(const X509_OBJECT *a) {
if (a == NULL || a->type != X509_LU_X509) {
return NULL;
}
return a->data.x509;
}
static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
X509_NAME *name, int *pnmatch) {
X509_OBJECT stmp;
X509 x509_s;
X509_CINF cinf_s;
X509_CRL crl_s;
X509_CRL_INFO crl_info_s;
stmp.type = type;
switch (type) {
case X509_LU_X509:
stmp.data.x509 = &x509_s;
x509_s.cert_info = &cinf_s;
cinf_s.subject = name;
break;
case X509_LU_CRL:
stmp.data.crl = &crl_s;
crl_s.crl = &crl_info_s;
crl_info_s.issuer = name;
break;
default:
// abort();
return -1;
}
size_t idx;
sk_X509_OBJECT_sort(h);
if (!sk_X509_OBJECT_find(h, &idx, &stmp)) {
return -1;
}
if (pnmatch != NULL) {
*pnmatch = 1;
for (size_t tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++) {
const X509_OBJECT *tobj = sk_X509_OBJECT_value(h, tidx);
if (x509_object_cmp(tobj, &stmp)) {
break;
}
(*pnmatch)++;
}
}
return (int)idx;
}
static int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
X509_NAME *name) {
return x509_object_idx_cnt(h, type, name, NULL);
}
static X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
int type, X509_NAME *name) {
int idx;
idx = X509_OBJECT_idx_by_subject(h, type, name);
if (idx == -1) {
return NULL;
}
return sk_X509_OBJECT_value(h, idx);
}
static X509_OBJECT *x509_object_dup(const X509_OBJECT *obj) {
X509_OBJECT *ret = X509_OBJECT_new();
if (ret == NULL) {
return NULL;
}
ret->type = obj->type;
ret->data = obj->data;
X509_OBJECT_up_ref_count(ret);
return ret;
}
STACK_OF(X509_OBJECT) *X509_STORE_get1_objects(X509_STORE *store) {
CRYPTO_MUTEX_lock_read(&store->objs_lock);
STACK_OF(X509_OBJECT) *ret =
sk_X509_OBJECT_deep_copy(store->objs, x509_object_dup, X509_OBJECT_free);
CRYPTO_MUTEX_unlock_read(&store->objs_lock);
return ret;
}
STACK_OF(X509_OBJECT) *X509_STORE_get0_objects(X509_STORE *store) {
return store->objs;
}
STACK_OF(X509) *X509_STORE_CTX_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm) {
int cnt;
STACK_OF(X509) *sk = sk_X509_new_null();
if (sk == NULL) {
return NULL;
}
CRYPTO_MUTEX_lock_write(&ctx->ctx->objs_lock);
int idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
if (idx < 0) {
// Nothing found in cache: do lookup to possibly add new objects to
// cache
X509_OBJECT xobj;
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
if (!X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, nm, &xobj)) {
sk_X509_free(sk);
return NULL;
}
X509_OBJECT_free_contents(&xobj);
CRYPTO_MUTEX_lock_write(&ctx->ctx->objs_lock);
idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
if (idx < 0) {
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
sk_X509_free(sk);
return NULL;
}
}
for (int i = 0; i < cnt; i++, idx++) {
X509_OBJECT *obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
X509 *x = obj->data.x509;
if (!sk_X509_push(sk, x)) {
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
sk_X509_pop_free(sk, X509_free);
return NULL;
}
X509_up_ref(x);
}
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
return sk;
}
STACK_OF(X509_CRL) *X509_STORE_CTX_get1_crls(X509_STORE_CTX *ctx,
X509_NAME *nm) {
int cnt;
X509_OBJECT xobj;
STACK_OF(X509_CRL) *sk = sk_X509_CRL_new_null();
if (sk == NULL) {
return NULL;
}
// Always do lookup to possibly add new CRLs to cache.
if (!X509_STORE_CTX_get_by_subject(ctx, X509_LU_CRL, nm, &xobj)) {
sk_X509_CRL_free(sk);
return NULL;
}
X509_OBJECT_free_contents(&xobj);
CRYPTO_MUTEX_lock_write(&ctx->ctx->objs_lock);
int idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
if (idx < 0) {
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
sk_X509_CRL_free(sk);
return NULL;
}
for (int i = 0; i < cnt; i++, idx++) {
X509_OBJECT *obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
X509_CRL *x = obj->data.crl;
X509_CRL_up_ref(x);
if (!sk_X509_CRL_push(sk, x)) {
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
X509_CRL_free(x);
sk_X509_CRL_pop_free(sk, X509_CRL_free);
return NULL;
}
}
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
return sk;
}
static X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
X509_OBJECT *x) {
sk_X509_OBJECT_sort(h);
size_t idx;
if (!sk_X509_OBJECT_find(h, &idx, x)) {
return NULL;
}
if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL)) {
return sk_X509_OBJECT_value(h, idx);
}
for (size_t i = idx; i < sk_X509_OBJECT_num(h); i++) {
X509_OBJECT *obj = sk_X509_OBJECT_value(h, i);
if (x509_object_cmp(obj, x)) {
return NULL;
}
if (x->type == X509_LU_X509) {
if (!X509_cmp(obj->data.x509, x->data.x509)) {
return obj;
}
} else if (x->type == X509_LU_CRL) {
if (!X509_CRL_match(obj->data.crl, x->data.crl)) {
return obj;
}
} else {
return obj;
}
}
return NULL;
}
int X509_STORE_CTX_get1_issuer(X509 **out_issuer, X509_STORE_CTX *ctx,
X509 *x) {
X509_NAME *xn;
X509_OBJECT obj, *pobj;
int idx, ret;
size_t i;
xn = X509_get_issuer_name(x);
if (!X509_STORE_CTX_get_by_subject(ctx, X509_LU_X509, xn, &obj)) {
return 0;
}
// If certificate matches all OK
if (x509_check_issued_with_callback(ctx, x, obj.data.x509)) {
*out_issuer = obj.data.x509;
return 1;
}
X509_OBJECT_free_contents(&obj);
// Else find index of first cert accepted by
// |x509_check_issued_with_callback|.
ret = 0;
CRYPTO_MUTEX_lock_write(&ctx->ctx->objs_lock);
idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
if (idx != -1) { // should be true as we've had at least one
// match
// Look through all matching certs for suitable issuer
for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) {
pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
// See if we've run past the matches
if (pobj->type != X509_LU_X509) {
break;
}
if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) {
break;
}
if (x509_check_issued_with_callback(ctx, x, pobj->data.x509)) {
*out_issuer = pobj->data.x509;
X509_OBJECT_up_ref_count(pobj);
ret = 1;
break;
}
}
}
CRYPTO_MUTEX_unlock_write(&ctx->ctx->objs_lock);
return ret;
}
int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags) {
return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
}
int X509_STORE_set_depth(X509_STORE *ctx, int depth) {
X509_VERIFY_PARAM_set_depth(ctx->param, depth);
return 1;
}
int X509_STORE_set_purpose(X509_STORE *ctx, int purpose) {
return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
}
int X509_STORE_set_trust(X509_STORE *ctx, int trust) {
return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
}
int X509_STORE_set1_param(X509_STORE *ctx, const X509_VERIFY_PARAM *param) {
return X509_VERIFY_PARAM_set1(ctx->param, param);
}
X509_VERIFY_PARAM *X509_STORE_get0_param(X509_STORE *ctx) { return ctx->param; }
void X509_STORE_set_verify_cb(X509_STORE *ctx,
X509_STORE_CTX_verify_cb verify_cb) {
ctx->verify_cb = verify_cb;
}
X509_STORE *X509_STORE_CTX_get0_store(const X509_STORE_CTX *ctx) {
return ctx->ctx;
}