diff --git a/ssl/ssl_x509.c b/ssl/ssl_x509.c
new file mode 100644
index 0000000..3fc62b7
--- /dev/null
+++ b/ssl/ssl_x509.c
@@ -0,0 +1,330 @@
+/* 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);
+}
+
+X509 *SSL_get_certificate(const SSL *ssl) {
+  if (ssl->cert != NULL) {
+    return ssl->cert->x509_leaf;
+  }
+
+  return NULL;
+}
+
+X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) {
+  if (ctx->cert != NULL) {
+    return ctx->cert->x509_leaf;
+  }
+
+  return NULL;
+}
+
+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;
+}