/* 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.
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE. */

#include <openssl/ssl.h>

#include <openssl/stack.h>
#include <openssl/x509.h>
#include <openssl/x509_vfy.h>

#include "internal.h"


X509 *SSL_get_peer_certificate(const SSL *ssl) {
  if (ssl == NULL) {
    return NULL;
  }
  SSL_SESSION *session = SSL_get_session(ssl);
  if (session == NULL || session->x509_peer == NULL) {
    return NULL;
  }
  X509_up_ref(session->x509_peer);
  return session->x509_peer;
}

STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *ssl) {
  if (ssl == NULL) {
    return NULL;
  }
  SSL_SESSION *session = SSL_get_session(ssl);
  if (session == NULL ||
      session->x509_chain == NULL) {
    return NULL;
  }

  if (!ssl->server) {
    return session->x509_chain;
  }

  /* OpenSSL historically didn't include the leaf certificate in the returned
   * certificate chain, but only for servers. */
  if (session->x509_chain_without_leaf == NULL) {
    session->x509_chain_without_leaf = sk_X509_new_null();
    if (session->x509_chain_without_leaf == NULL) {
      return NULL;
    }

    for (size_t i = 1; i < sk_X509_num(session->x509_chain); i++) {
      X509 *cert = sk_X509_value(session->x509_chain, i);
      if (!sk_X509_push(session->x509_chain_without_leaf, cert)) {
        sk_X509_pop_free(session->x509_chain_without_leaf, X509_free);
        session->x509_chain_without_leaf = NULL;
        return NULL;
      }
      X509_up_ref(cert);
    }
  }

  return session->x509_chain_without_leaf;
}

STACK_OF(X509) *SSL_get_peer_full_cert_chain(const SSL *ssl) {
  SSL_SESSION *session = SSL_get_session(ssl);
  if (session == NULL) {
    return NULL;
  }

  return session->x509_chain;
}

int SSL_CTX_set_purpose(SSL_CTX *ctx, int purpose) {
  return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
}

int SSL_set_purpose(SSL *ssl, int purpose) {
  return X509_VERIFY_PARAM_set_purpose(ssl->param, purpose);
}

int SSL_CTX_set_trust(SSL_CTX *ctx, int trust) {
  return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
}

int SSL_set_trust(SSL *ssl, int trust) {
  return X509_VERIFY_PARAM_set_trust(ssl->param, trust);
}

int SSL_CTX_set1_param(SSL_CTX *ctx, const X509_VERIFY_PARAM *param) {
  return X509_VERIFY_PARAM_set1(ctx->param, param);
}

int SSL_set1_param(SSL *ssl, const X509_VERIFY_PARAM *param) {
  return X509_VERIFY_PARAM_set1(ssl->param, param);
}

X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx) { return ctx->param; }

X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl) { return ssl->param; }

int SSL_get_verify_depth(const SSL *ssl) {
  return X509_VERIFY_PARAM_get_depth(ssl->param);
}

int (*SSL_get_verify_callback(const SSL *ssl))(int, X509_STORE_CTX *) {
  return ssl->verify_callback;
}

int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) { return ctx->verify_mode; }

int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) {
  return X509_VERIFY_PARAM_get_depth(ctx->param);
}

int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(
    int ok, X509_STORE_CTX *store_ctx) {
  return ctx->default_verify_callback;
}

void SSL_set_verify(SSL *ssl, int mode,
                    int (*callback)(int ok, X509_STORE_CTX *store_ctx)) {
  ssl->verify_mode = mode;
  if (callback != NULL) {
    ssl->verify_callback = callback;
  }
}

void SSL_set_verify_depth(SSL *ssl, int depth) {
  X509_VERIFY_PARAM_set_depth(ssl->param, depth);
}

void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
                                      int (*cb)(X509_STORE_CTX *store_ctx,
                                                void *arg),
                                      void *arg) {
  ctx->app_verify_callback = cb;
  ctx->app_verify_arg = arg;
}

void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
                        int (*cb)(int, X509_STORE_CTX *)) {
  ctx->verify_mode = mode;
  ctx->default_verify_callback = cb;
}

void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) {
  X509_VERIFY_PARAM_set_depth(ctx->param, depth);
}

static X509 *ssl_cert_get0_leaf(CERT *cert) {
  if (cert->x509_leaf == NULL &&
      !ssl_cert_cache_leaf_cert(cert)) {
    return NULL;
  }

  return cert->x509_leaf;
}

X509 *SSL_get_certificate(const SSL *ssl) {
  return ssl_cert_get0_leaf(ssl->cert);
}

X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) {
  return ssl_cert_get0_leaf(ctx->cert);
}

int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) {
  return X509_STORE_set_default_paths(ctx->cert_store);
}

int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *ca_file,
                                  const char *ca_dir) {
  return X509_STORE_load_locations(ctx->cert_store, ca_file, ca_dir);
}

void SSL_set_verify_result(SSL *ssl, long result) {
  if (result != X509_V_OK) {
    abort();
  }
}

long SSL_get_verify_result(const SSL *ssl) {
  SSL_SESSION *session = SSL_get_session(ssl);
  if (session == NULL) {
    return X509_V_ERR_INVALID_CALL;
  }
  return session->verify_result;
}

X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx) {
  return ctx->cert_store;
}

void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) {
  X509_STORE_free(ctx->cert_store);
  ctx->cert_store = store;
}