pineapple/externals/libressl/ssl/ssl_cert.c

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2020-12-28 16:15:37 +01:00
/* $OpenBSD: ssl_cert.c,v 1.78 2020/06/05 17:55:24 jsing 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.]
*/
/* ====================================================================
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* ECC cipher suite support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <unistd.h>
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/objects.h>
#include <openssl/opensslconf.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include "ssl_locl.h"
int
SSL_get_ex_data_X509_STORE_CTX_idx(void)
{
static volatile int ssl_x509_store_ctx_idx = -1;
int got_write_lock = 0;
CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
if (ssl_x509_store_ctx_idx < 0) {
CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
got_write_lock = 1;
if (ssl_x509_store_ctx_idx < 0) {
ssl_x509_store_ctx_idx =
X509_STORE_CTX_get_ex_new_index(
0, "SSL for verify callback", NULL, NULL, NULL);
}
}
if (got_write_lock)
CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
else
CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
return ssl_x509_store_ctx_idx;
}
CERT *
ssl_cert_new(void)
{
CERT *ret;
ret = calloc(1, sizeof(CERT));
if (ret == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
return (NULL);
}
ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
ret->references = 1;
return (ret);
}
CERT *
ssl_cert_dup(CERT *cert)
{
CERT *ret;
int i;
ret = calloc(1, sizeof(CERT));
if (ret == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
return (NULL);
}
/*
* same as ret->key = ret->pkeys + (cert->key - cert->pkeys),
* if you find that more readable
*/
ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
ret->valid = cert->valid;
ret->mask_k = cert->mask_k;
ret->mask_a = cert->mask_a;
if (cert->dh_tmp != NULL) {
ret->dh_tmp = DHparams_dup(cert->dh_tmp);
if (ret->dh_tmp == NULL) {
SSLerrorx(ERR_R_DH_LIB);
goto err;
}
if (cert->dh_tmp->priv_key) {
BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
if (!b) {
SSLerrorx(ERR_R_BN_LIB);
goto err;
}
ret->dh_tmp->priv_key = b;
}
if (cert->dh_tmp->pub_key) {
BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
if (!b) {
SSLerrorx(ERR_R_BN_LIB);
goto err;
}
ret->dh_tmp->pub_key = b;
}
}
ret->dh_tmp_cb = cert->dh_tmp_cb;
ret->dh_tmp_auto = cert->dh_tmp_auto;
for (i = 0; i < SSL_PKEY_NUM; i++) {
if (cert->pkeys[i].x509 != NULL) {
ret->pkeys[i].x509 = cert->pkeys[i].x509;
CRYPTO_add(&ret->pkeys[i].x509->references, 1,
CRYPTO_LOCK_X509);
}
if (cert->pkeys[i].privatekey != NULL) {
ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
CRYPTO_LOCK_EVP_PKEY);
switch (i) {
/*
* If there was anything special to do for
* certain types of keys, we'd do it here.
* (Nothing at the moment, I think.)
*/
case SSL_PKEY_RSA:
/* We have an RSA key. */
break;
case SSL_PKEY_ECC:
/* We have an ECC key */
break;
case SSL_PKEY_GOST01:
/* We have a GOST key */
break;
default:
/* Can't happen. */
SSLerrorx(SSL_R_LIBRARY_BUG);
}
}
if (cert->pkeys[i].chain != NULL) {
if ((ret->pkeys[i].chain =
X509_chain_up_ref(cert->pkeys[i].chain)) == NULL)
goto err;
}
}
/*
* ret->extra_certs *should* exist, but currently the own certificate
* chain is held inside SSL_CTX
*/
ret->references = 1;
return (ret);
err:
DH_free(ret->dh_tmp);
for (i = 0; i < SSL_PKEY_NUM; i++) {
X509_free(ret->pkeys[i].x509);
EVP_PKEY_free(ret->pkeys[i].privatekey);
sk_X509_pop_free(ret->pkeys[i].chain, X509_free);
}
free (ret);
return NULL;
}
void
ssl_cert_free(CERT *c)
{
int i;
if (c == NULL)
return;
i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
if (i > 0)
return;
DH_free(c->dh_tmp);
for (i = 0; i < SSL_PKEY_NUM; i++) {
X509_free(c->pkeys[i].x509);
EVP_PKEY_free(c->pkeys[i].privatekey);
sk_X509_pop_free(c->pkeys[i].chain, X509_free);
}
free(c);
}
int
ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
{
if (c->key == NULL)
return 0;
sk_X509_pop_free(c->key->chain, X509_free);
c->key->chain = chain;
return 1;
}
int
ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
{
STACK_OF(X509) *new_chain = NULL;
if (chain != NULL) {
if ((new_chain = X509_chain_up_ref(chain)) == NULL)
return 0;
}
if (!ssl_cert_set0_chain(c, new_chain)) {
sk_X509_pop_free(new_chain, X509_free);
return 0;
}
return 1;
}
int
ssl_cert_add0_chain_cert(CERT *c, X509 *cert)
{
if (c->key == NULL)
return 0;
if (c->key->chain == NULL) {
if ((c->key->chain = sk_X509_new_null()) == NULL)
return 0;
}
if (!sk_X509_push(c->key->chain, cert))
return 0;
return 1;
}
int
ssl_cert_add1_chain_cert(CERT *c, X509 *cert)
{
if (!ssl_cert_add0_chain_cert(c, cert))
return 0;
X509_up_ref(cert);
return 1;
}
SESS_CERT *
ssl_sess_cert_new(void)
{
SESS_CERT *ret;
ret = calloc(1, sizeof *ret);
if (ret == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA]);
ret->references = 1;
return ret;
}
void
ssl_sess_cert_free(SESS_CERT *sc)
{
int i;
if (sc == NULL)
return;
i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
if (i > 0)
return;
sk_X509_pop_free(sc->cert_chain, X509_free);
for (i = 0; i < SSL_PKEY_NUM; i++)
X509_free(sc->peer_pkeys[i].x509);
DH_free(sc->peer_dh_tmp);
EC_KEY_free(sc->peer_ecdh_tmp);
free(sc->peer_x25519_tmp);
free(sc);
}
int
ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
{
X509_STORE_CTX ctx;
X509 *x;
int ret;
if ((sk == NULL) || (sk_X509_num(sk) == 0))
return (0);
x = sk_X509_value(sk, 0);
if (!X509_STORE_CTX_init(&ctx, s->ctx->cert_store, x, sk)) {
SSLerror(s, ERR_R_X509_LIB);
return (0);
}
X509_STORE_CTX_set_ex_data(&ctx,
SSL_get_ex_data_X509_STORE_CTX_idx(), s);
/*
* We need to inherit the verify parameters. These can be
* determined by the context: if its a server it will verify
* SSL client certificates or vice versa.
*/
X509_STORE_CTX_set_default(&ctx,
s->server ? "ssl_client" : "ssl_server");
/*
* Anything non-default in "param" should overwrite anything
* in the ctx.
*/
X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
if (s->internal->verify_callback)
X509_STORE_CTX_set_verify_cb(&ctx, s->internal->verify_callback);
if (s->ctx->internal->app_verify_callback != NULL)
ret = s->ctx->internal->app_verify_callback(&ctx,
s->ctx->internal->app_verify_arg);
else
ret = X509_verify_cert(&ctx);
s->verify_result = ctx.error;
X509_STORE_CTX_cleanup(&ctx);
return (ret);
}
static void
set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
STACK_OF(X509_NAME) *name_list)
{
sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
*ca_list = name_list;
}
STACK_OF(X509_NAME) *
SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
{
int i;
STACK_OF(X509_NAME) *ret;
X509_NAME *name = NULL;
if ((ret = sk_X509_NAME_new_null()) == NULL)
goto err;
for (i = 0; i < sk_X509_NAME_num(sk); i++) {
if ((name = X509_NAME_dup(sk_X509_NAME_value(sk, i))) == NULL)
goto err;
if (!sk_X509_NAME_push(ret, name))
goto err;
}
return (ret);
err:
X509_NAME_free(name);
sk_X509_NAME_pop_free(ret, X509_NAME_free);
return NULL;
}
void
SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
{
set_client_CA_list(&(s->internal->client_CA), name_list);
}
void
SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
{
set_client_CA_list(&(ctx->internal->client_CA), name_list);
}
STACK_OF(X509_NAME) *
SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
{
return (ctx->internal->client_CA);
}
STACK_OF(X509_NAME) *
SSL_get_client_CA_list(const SSL *s)
{
if (s->internal->type == SSL_ST_CONNECT) {
/* We are in the client. */
if ((s->version >> 8) == SSL3_VERSION_MAJOR)
return (S3I(s)->tmp.ca_names);
else
return (NULL);
} else {
if (s->internal->client_CA != NULL)
return (s->internal->client_CA);
else
return (s->ctx->internal->client_CA);
}
}
static int
add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
{
X509_NAME *name;
if (x == NULL)
return (0);
if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
return (0);
if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
return (0);
if (!sk_X509_NAME_push(*sk, name)) {
X509_NAME_free(name);
return (0);
}
return (1);
}
int
SSL_add_client_CA(SSL *ssl, X509 *x)
{
return (add_client_CA(&(ssl->internal->client_CA), x));
}
int
SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
{
return (add_client_CA(&(ctx->internal->client_CA), x));
}
static int
xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
{
return (X509_NAME_cmp(*a, *b));
}
/*!
* Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
* it doesn't really have anything to do with clients (except that a common use
* for a stack of CAs is to send it to the client). Actually, it doesn't have
* much to do with CAs, either, since it will load any old cert.
* \param file the file containing one or more certs.
* \return a ::STACK containing the certs.
*/
STACK_OF(X509_NAME) *
SSL_load_client_CA_file(const char *file)
{
BIO *in;
X509 *x = NULL;
X509_NAME *xn = NULL;
STACK_OF(X509_NAME) *ret = NULL, *sk;
sk = sk_X509_NAME_new(xname_cmp);
in = BIO_new(BIO_s_file_internal());
if ((sk == NULL) || (in == NULL)) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
if (!BIO_read_filename(in, file))
goto err;
for (;;) {
if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
break;
if (ret == NULL) {
ret = sk_X509_NAME_new_null();
if (ret == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
}
if ((xn = X509_get_subject_name(x)) == NULL) goto err;
/* check for duplicates */
xn = X509_NAME_dup(xn);
if (xn == NULL)
goto err;
if (sk_X509_NAME_find(sk, xn) >= 0)
X509_NAME_free(xn);
else {
sk_X509_NAME_push(sk, xn);
sk_X509_NAME_push(ret, xn);
}
}
if (0) {
err:
sk_X509_NAME_pop_free(ret, X509_NAME_free);
ret = NULL;
}
sk_X509_NAME_free(sk);
BIO_free(in);
X509_free(x);
if (ret != NULL)
ERR_clear_error();
return (ret);
}
/*!
* Add a file of certs to a stack.
* \param stack the stack to add to.
* \param file the file to add from. All certs in this file that are not
* already in the stack will be added.
* \return 1 for success, 0 for failure. Note that in the case of failure some
* certs may have been added to \c stack.
*/
int
SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
const char *file)
{
BIO *in;
X509 *x = NULL;
X509_NAME *xn = NULL;
int ret = 1;
int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
if (!BIO_read_filename(in, file))
goto err;
for (;;) {
if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
break;
if ((xn = X509_get_subject_name(x)) == NULL) goto err;
xn = X509_NAME_dup(xn);
if (xn == NULL)
goto err;
if (sk_X509_NAME_find(stack, xn) >= 0)
X509_NAME_free(xn);
else
sk_X509_NAME_push(stack, xn);
}
ERR_clear_error();
if (0) {
err:
ret = 0;
}
BIO_free(in);
X509_free(x);
(void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
return ret;
}
/*!
* Add a directory of certs to a stack.
* \param stack the stack to append to.
* \param dir the directory to append from. All files in this directory will be
* examined as potential certs. Any that are acceptable to
* SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will
* be included.
* \return 1 for success, 0 for failure. Note that in the case of failure some
* certs may have been added to \c stack.
*/
int
SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *dir)
{
DIR *dirp = NULL;
char *path = NULL;
int ret = 0;
dirp = opendir(dir);
if (dirp) {
struct dirent *dp;
while ((dp = readdir(dirp)) != NULL) {
if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) {
ret = SSL_add_file_cert_subjects_to_stack(
stack, path);
free(path);
}
if (!ret)
break;
}
(void) closedir(dirp);
}
if (!ret) {
SYSerror(errno);
ERR_asprintf_error_data("opendir ('%s')", dir);
SSLerrorx(ERR_R_SYS_LIB);
}
return ret;
}