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/*
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* SSLsplit - transparent SSL/TLS interception
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* Copyright (c) 2009-2016, Daniel Roethlisberger <daniel@roe.ch>
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* All rights reserved.
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* http://www.roe.ch/SSLsplit
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "cert.h"
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#include "ssl.h"
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#include <string.h>
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/*
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* Certificate, including private key and certificate chain.
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*/
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cert_t *
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cert_new(void)
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{
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cert_t *c;
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if (!(c = malloc(sizeof(cert_t))))
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return NULL;
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memset(c, 0, sizeof(cert_t));
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if (pthread_mutex_init(&c->mutex, NULL)) {
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free(c);
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return NULL;
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}
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c->references = 1;
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return c;
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}
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/*
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* Passed OpenSSL objects are owned by cert_t; refcount will not be
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* incremented, stack will not be duplicated.
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*/
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cert_t *
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cert_new3(EVP_PKEY *key, X509 *crt, STACK_OF(X509) *chain)
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{
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cert_t *c;
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if (!(c = malloc(sizeof(cert_t))))
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return NULL;
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if (pthread_mutex_init(&c->mutex, NULL)) {
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free(c);
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return NULL;
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}
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c->key = key;
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c->crt = crt;
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c->chain = chain;
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c->references = 1;
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return c;
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}
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/*
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* Passed OpenSSL objects are copied by cert_t; crt/key refcount will be
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* incremented, stack will be duplicated.
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*/
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cert_t *
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cert_new3_copy(EVP_PKEY *key, X509 *crt, STACK_OF(X509) *chain)
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{
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cert_t *c;
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if (!(c = malloc(sizeof(cert_t))))
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return NULL;
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if (pthread_mutex_init(&c->mutex, NULL)) {
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free(c);
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return NULL;
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}
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c->key = key;
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ssl_key_refcount_inc(c->key);
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c->crt = crt;
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ssl_x509_refcount_inc(c->crt);
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c->chain = sk_X509_dup(chain);
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for (int i = 0; i < sk_X509_num(c->chain); i++) {
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ssl_x509_refcount_inc(sk_X509_value(c->chain, i));
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}
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c->references = 1;
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return c;
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}
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/*
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* Load cert_t from file.
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*/
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cert_t *
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cert_new_load(const char *filename)
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{
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cert_t *c;
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if (!(c = malloc(sizeof(cert_t))))
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return NULL;
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memset(c, 0, sizeof(cert_t));
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if (pthread_mutex_init(&c->mutex, NULL)) {
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free(c);
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return NULL;
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}
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if (ssl_x509chain_load(&c->crt, &c->chain, filename) == -1) {
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free(c);
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return NULL;
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}
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c->key = ssl_key_load(filename);
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if (!c->key) {
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X509_free(c->crt);
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if (c->chain) {
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sk_X509_pop_free(c->chain, X509_free);
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}
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free(c);
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return NULL;
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}
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c->references = 1;
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return c;
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}
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/*
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* Increment reference count.
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*/
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void
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cert_refcount_inc(cert_t *c)
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{
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pthread_mutex_lock(&c->mutex);
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c->references++;
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pthread_mutex_unlock(&c->mutex);
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}
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/*
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* Thread-safe setter functions; they copy the value (refcounts are inc'd).
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*/
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void
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cert_set_key(cert_t *c, EVP_PKEY *key)
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{
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pthread_mutex_lock(&c->mutex);
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if (c->key) {
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EVP_PKEY_free(c->key);
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}
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c->key = key;
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if (c->key) {
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ssl_key_refcount_inc(c->key);
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}
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pthread_mutex_unlock(&c->mutex);
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}
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void
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cert_set_crt(cert_t *c, X509 *crt)
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{
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pthread_mutex_lock(&c->mutex);
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if (c->crt) {
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X509_free(c->crt);
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}
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c->crt = crt;
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if (c->crt) {
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ssl_x509_refcount_inc(c->crt);
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}
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pthread_mutex_unlock(&c->mutex);
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}
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void
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cert_set_chain(cert_t *c, STACK_OF(X509) *chain)
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{
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pthread_mutex_lock(&c->mutex);
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if (c->chain) {
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sk_X509_pop_free(c->chain, X509_free);
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}
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if (chain) {
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c->chain = sk_X509_dup(chain);
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for (int i = 0; i < sk_X509_num(c->chain); i++) {
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ssl_x509_refcount_inc(sk_X509_value(c->chain, i));
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}
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} else {
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c->chain = NULL;
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}
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pthread_mutex_unlock(&c->mutex);
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}
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/*
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* Free cert including internal objects.
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*/
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void
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cert_free(cert_t *c)
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{
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pthread_mutex_lock(&c->mutex);
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c->references--;
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if (c->references) {
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pthread_mutex_unlock(&c->mutex);
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return;
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}
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pthread_mutex_unlock(&c->mutex);
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pthread_mutex_destroy(&c->mutex);
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if (c->key) {
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EVP_PKEY_free(c->key);
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}
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if (c->crt) {
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X509_free(c->crt);
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}
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if (c->chain) {
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sk_X509_pop_free(c->chain, X509_free);
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}
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free(c);
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}
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/* vim: set noet ft=c: */
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