Issue #26470: Port ssl and hashlib module to OpenSSL 1.1.0.gentoo-3.4.10

(rebased for 3.4.10)

4 files changed, 271 insertions, 122 deletions

diff --git a/Lib/ssl.py b/Lib/ssl.py
index 873aa4798bb..359809a020f 100644
--- a/Lib/ssl.py
+++ b/Lib/ssl.py
@@ -51,6 +51,7 @@ The following constants identify various SSL protocol variants:
 PROTOCOL_SSLv2
 PROTOCOL_SSLv3
 PROTOCOL_SSLv23
+PROTOCOL_TLS
 PROTOCOL_TLSv1
 PROTOCOL_TLSv1_1
 PROTOCOL_TLSv1_2
@@ -348,13 +349,13 @@ class SSLContext(_SSLContext):
     __slots__ = ('protocol', '__weakref__')
     _windows_cert_stores = ("CA", "ROOT")
 
-    def __new__(cls, protocol, *args, **kwargs):
+    def __new__(cls, protocol=PROTOCOL_TLS, *args, **kwargs):
         self = _SSLContext.__new__(cls, protocol)
         if protocol != _SSLv2_IF_EXISTS:
             self.set_ciphers(_DEFAULT_CIPHERS)
         return self
 
-    def __init__(self, protocol):
+    def __init__(self, protocol=PROTOCOL_TLS):
         self.protocol = protocol
 
     def wrap_socket(self, sock, server_side=False,
@@ -408,7 +409,7 @@ def create_default_context(purpose=Purpose.SERVER_AUTH, *, cafile=None,
     if not isinstance(purpose, _ASN1Object):
         raise TypeError(purpose)
 
-    context = SSLContext(PROTOCOL_SSLv23)
+    context = SSLContext(PROTOCOL_TLS)
 
     # SSLv2 considered harmful.
     context.options |= OP_NO_SSLv2
@@ -445,7 +446,7 @@ def create_default_context(purpose=Purpose.SERVER_AUTH, *, cafile=None,
         context.load_default_certs(purpose)
     return context
 
-def _create_unverified_context(protocol=PROTOCOL_SSLv23, *, cert_reqs=None,
+def _create_unverified_context(protocol=PROTOCOL_TLS, *, cert_reqs=None,
                            check_hostname=False, purpose=Purpose.SERVER_AUTH,
                            certfile=None, keyfile=None,
                            cafile=None, capath=None, cadata=None):
@@ -501,7 +502,7 @@ class SSLSocket(socket):
 
     def __init__(self, sock=None, keyfile=None, certfile=None,
                  server_side=False, cert_reqs=CERT_NONE,
-                 ssl_version=PROTOCOL_SSLv23, ca_certs=None,
+                 ssl_version=PROTOCOL_TLS, ca_certs=None,
                  do_handshake_on_connect=True,
                  family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None,
                  suppress_ragged_eofs=True, npn_protocols=None, ciphers=None,
@@ -883,7 +884,7 @@ class SSLSocket(socket):
 
 def wrap_socket(sock, keyfile=None, certfile=None,
                 server_side=False, cert_reqs=CERT_NONE,
-                ssl_version=PROTOCOL_SSLv23, ca_certs=None,
+                ssl_version=PROTOCOL_TLS, ca_certs=None,
                 do_handshake_on_connect=True,
                 suppress_ragged_eofs=True,
                 ciphers=None):
@@ -930,7 +931,7 @@ def PEM_cert_to_DER_cert(pem_cert_string):
     d = pem_cert_string.strip()[len(PEM_HEADER):-len(PEM_FOOTER)]
     return base64.decodebytes(d.encode('ASCII', 'strict'))
 
-def get_server_certificate(addr, ssl_version=PROTOCOL_SSLv23, ca_certs=None):
+def get_server_certificate(addr, ssl_version=PROTOCOL_TLS, ca_certs=None):
     """Retrieve the certificate from the server at the specified address,
     and return it as a PEM-encoded string.
     If 'ca_certs' is specified, validate the server cert against it.
diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index e36a309bfae..b663a04aa2e 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -23,6 +23,9 @@ ssl = support.import_module("ssl")
 
 PROTOCOLS = sorted(ssl._PROTOCOL_NAMES)
 HOST = support.HOST
+IS_LIBRESSL = ssl.OPENSSL_VERSION.startswith('LibreSSL')
+IS_OPENSSL_1_1 = not IS_LIBRESSL and ssl.OPENSSL_VERSION_INFO >= (1, 1, 0)
+
 
 def data_file(*name):
     return os.path.join(os.path.dirname(__file__), *name)
@@ -318,9 +321,9 @@ class BasicSocketTests(unittest.TestCase):
         self.assertGreaterEqual(status, 0)
         self.assertLessEqual(status, 15)
         # Version string as returned by {Open,Libre}SSL, the format might change
-        if "LibreSSL" in s:
-            self.assertTrue(s.startswith("LibreSSL {:d}.{:d}".format(major, minor)),
-                            (s, t))
+        if IS_LIBRESSL:
+            self.assertTrue(s.startswith("LibreSSL {:d}".format(major)),
+                            (s, t, hex(n)))
         else:
             self.assertTrue(s.startswith("OpenSSL {:d}.{:d}.{:d}".format(major, minor, fix)),
                             (s, t))
@@ -677,7 +680,8 @@ class ContextTests(unittest.TestCase):
     def test_constructor(self):
         for protocol in PROTOCOLS:
             ssl.SSLContext(protocol)
-        self.assertRaises(TypeError, ssl.SSLContext)
+        ctx = ssl.SSLContext()
+        self.assertEqual(ctx.protocol, ssl.PROTOCOL_TLS)
         self.assertRaises(ValueError, ssl.SSLContext, -1)
         self.assertRaises(ValueError, ssl.SSLContext, 42)
 
@@ -698,15 +702,15 @@ class ContextTests(unittest.TestCase):
     def test_options(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
         # OP_ALL | OP_NO_SSLv2 | OP_NO_SSLv3 is the default value
-        self.assertEqual(ssl.OP_ALL | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3,
-                         ctx.options)
+        default = (ssl.OP_ALL | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3)
+        if not IS_LIBRESSL and ssl.OPENSSL_VERSION_INFO >= (1, 1, 0):
+            default |= ssl.OP_NO_COMPRESSION
+        self.assertEqual(default, ctx.options)
         ctx.options |= ssl.OP_NO_TLSv1
-        self.assertEqual(ssl.OP_ALL | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 | ssl.OP_NO_TLSv1,
-                         ctx.options)
+        self.assertEqual(default | ssl.OP_NO_TLSv1, ctx.options)
         if can_clear_options():
-            ctx.options = (ctx.options & ~ssl.OP_NO_SSLv2) | ssl.OP_NO_TLSv1
-            self.assertEqual(ssl.OP_ALL | ssl.OP_NO_TLSv1 | ssl.OP_NO_SSLv3,
-                             ctx.options)
+            ctx.options = (ctx.options & ~ssl.OP_NO_TLSv1)
+            self.assertEqual(default, ctx.options)
             ctx.options = 0
             # Ubuntu has OP_NO_SSLv3 forced on by default
             self.assertEqual(0, ctx.options & ~ssl.OP_NO_SSLv3)
@@ -1042,6 +1046,7 @@ class ContextTests(unittest.TestCase):
         self.assertRaises(TypeError, ctx.load_default_certs, 'SERVER_AUTH')
 
     @unittest.skipIf(sys.platform == "win32", "not-Windows specific")
+    @unittest.skipIf(IS_LIBRESSL, "LibreSSL doesn't support env vars")
     def test_load_default_certs_env(self):
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
         with support.EnvironmentVarGuard() as env:
diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index 5b0a7be12b0..86a8950588e 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -20,7 +20,6 @@
 
 /* EVP is the preferred interface to hashing in OpenSSL */
 #include <openssl/evp.h>
-#include <openssl/hmac.h>
 /* We use the object interface to discover what hashes OpenSSL supports. */
 #include <openssl/objects.h>
 #include "openssl/err.h"
@@ -31,15 +30,22 @@
 #define HASH_OBJ_CONSTRUCTOR 0
 #endif
 
-/* Minimum OpenSSL version needed to support sha224 and higher. */
-#if defined(OPENSSL_VERSION_NUMBER) && (OPENSSL_VERSION_NUMBER >= 0x00908000)
-#define _OPENSSL_SUPPORTS_SHA2
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
+/* OpenSSL < 1.1.0 */
+#define EVP_MD_CTX_new EVP_MD_CTX_create
+#define EVP_MD_CTX_free EVP_MD_CTX_destroy
+#define HAS_FAST_PKCS5_PBKDF2_HMAC 0
+#include <openssl/hmac.h>
+#else
+/* OpenSSL >= 1.1.0 */
+#define HAS_FAST_PKCS5_PBKDF2_HMAC 1
 #endif
 
+
 typedef struct {
     PyObject_HEAD
     PyObject            *name;  /* name of this hash algorithm */
-    EVP_MD_CTX           ctx;   /* OpenSSL message digest context */
+    EVP_MD_CTX          *ctx;   /* OpenSSL message digest context */
 #ifdef WITH_THREAD
     PyThread_type_lock   lock;  /* OpenSSL context lock */
 #endif
@@ -51,7 +57,6 @@ static PyTypeObject EVPtype;
 
 #define DEFINE_CONSTS_FOR_NEW(Name)  \
     static PyObject *CONST_ ## Name ## _name_obj = NULL; \
-    static EVP_MD_CTX CONST_new_ ## Name ## _ctx; \
     static EVP_MD_CTX *CONST_new_ ## Name ## _ctx_p = NULL;
 
 DEFINE_CONSTS_FOR_NEW(md5)
@@ -64,19 +69,57 @@ DEFINE_CONSTS_FOR_NEW(sha512)
 #endif
 
 
+/* LCOV_EXCL_START */
+static PyObject *
+_setException(PyObject *exc)
+{
+    unsigned long errcode;
+    const char *lib, *func, *reason;
+
+    errcode = ERR_peek_last_error();
+    if (!errcode) {
+        PyErr_SetString(exc, "unknown reasons");
+        return NULL;
+    }
+    ERR_clear_error();
+
+    lib = ERR_lib_error_string(errcode);
+    func = ERR_func_error_string(errcode);
+    reason = ERR_reason_error_string(errcode);
+
+    if (lib && func) {
+        PyErr_Format(exc, "[%s: %s] %s", lib, func, reason);
+    }
+    else if (lib) {
+        PyErr_Format(exc, "[%s] %s", lib, reason);
+    }
+    else {
+        PyErr_SetString(exc, reason);
+    }
+    return NULL;
+}
+/* LCOV_EXCL_STOP */
+
 static EVPobject *
 newEVPobject(PyObject *name)
 {
     EVPobject *retval = (EVPobject *)PyObject_New(EVPobject, &EVPtype);
+    if (retval == NULL) {
+        return NULL;
+    }
+
+    retval->ctx = EVP_MD_CTX_new();
+    if (retval->ctx == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
 
     /* save the name for .name to return */
-    if (retval != NULL) {
-        Py_INCREF(name);
-        retval->name = name;
+    Py_INCREF(name);
+    retval->name = name;
 #ifdef WITH_THREAD
-        retval->lock = NULL;
+    retval->lock = NULL;
 #endif
-    }
 
     return retval;
 }
@@ -91,7 +134,7 @@ EVP_hash(EVPobject *self, const void *vp, Py_ssize_t len)
             process = MUNCH_SIZE;
         else
             process = Py_SAFE_DOWNCAST(len, Py_ssize_t, unsigned int);
-        EVP_DigestUpdate(&self->ctx, (const void*)cp, process);
+        EVP_DigestUpdate(self->ctx, (const void*)cp, process);
         len -= process;
         cp += process;
     }
@@ -106,16 +149,19 @@ EVP_dealloc(EVPobject *self)
     if (self->lock != NULL)
         PyThread_free_lock(self->lock);
 #endif
-    EVP_MD_CTX_cleanup(&self->ctx);
+    EVP_MD_CTX_free(self->ctx);
     Py_XDECREF(self->name);
     PyObject_Del(self);
 }
 
-static void locked_EVP_MD_CTX_copy(EVP_MD_CTX *new_ctx_p, EVPobject *self)
+static int
+locked_EVP_MD_CTX_copy(EVP_MD_CTX *new_ctx_p, EVPobject *self)
 {
+    int result;
     ENTER_HASHLIB(self);
-    EVP_MD_CTX_copy(new_ctx_p, &self->ctx);
+    result = EVP_MD_CTX_copy(new_ctx_p, self->ctx);
     LEAVE_HASHLIB(self);
+    return result;
 }
 
 /* External methods for a hash object */
@@ -131,7 +177,9 @@ EVP_copy(EVPobject *self, PyObject *unused)
     if ( (newobj = newEVPobject(self->name))==NULL)
         return NULL;
 
-    locked_EVP_MD_CTX_copy(&newobj->ctx, self);
+    if (!locked_EVP_MD_CTX_copy(newobj->ctx, self)) {
+        return _setException(PyExc_ValueError);
+    }
     return (PyObject *)newobj;
 }
 
@@ -142,16 +190,24 @@ static PyObject *
 EVP_digest(EVPobject *self, PyObject *unused)
 {
     unsigned char digest[EVP_MAX_MD_SIZE];
-    EVP_MD_CTX temp_ctx;
+    EVP_MD_CTX *temp_ctx;
     PyObject *retval;
     unsigned int digest_size;
 
-    locked_EVP_MD_CTX_copy(&temp_ctx, self);
-    digest_size = EVP_MD_CTX_size(&temp_ctx);
-    EVP_DigestFinal(&temp_ctx, digest, NULL);
+    temp_ctx = EVP_MD_CTX_new();
+    if (temp_ctx == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+
+    if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) {
+        return _setException(PyExc_ValueError);
+    }
+    digest_size = EVP_MD_CTX_size(temp_ctx);
+    EVP_DigestFinal(temp_ctx, digest, NULL);
 
     retval = PyBytes_FromStringAndSize((const char *)digest, digest_size);
-    EVP_MD_CTX_cleanup(&temp_ctx);
+    EVP_MD_CTX_free(temp_ctx);
     return retval;
 }
 
@@ -162,17 +218,25 @@ static PyObject *
 EVP_hexdigest(EVPobject *self, PyObject *unused)
 {
     unsigned char digest[EVP_MAX_MD_SIZE];
-    EVP_MD_CTX temp_ctx;
+    EVP_MD_CTX *temp_ctx;
     PyObject *retval;
     char *hex_digest;
     unsigned int i, j, digest_size;
 
+    temp_ctx = EVP_MD_CTX_new();
+    if (temp_ctx == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+
     /* Get the raw (binary) digest value */
-    locked_EVP_MD_CTX_copy(&temp_ctx, self);
-    digest_size = EVP_MD_CTX_size(&temp_ctx);
-    EVP_DigestFinal(&temp_ctx, digest, NULL);
+    if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) {
+        return _setException(PyExc_ValueError);
+    }
+    digest_size = EVP_MD_CTX_size(temp_ctx);
+    EVP_DigestFinal(temp_ctx, digest, NULL);
 
-    EVP_MD_CTX_cleanup(&temp_ctx);
+    EVP_MD_CTX_free(temp_ctx);
 
     /* Allocate a new buffer */
     hex_digest = PyMem_Malloc(digest_size * 2 + 1);
@@ -241,7 +305,7 @@ static PyObject *
 EVP_get_block_size(EVPobject *self, void *closure)
 {
     long block_size;
-    block_size = EVP_MD_CTX_block_size(&self->ctx);
+    block_size = EVP_MD_CTX_block_size(self->ctx);
     return PyLong_FromLong(block_size);
 }
 
@@ -249,7 +313,7 @@ static PyObject *
 EVP_get_digest_size(EVPobject *self, void *closure)
 {
     long size;
-    size = EVP_MD_CTX_size(&self->ctx);
+    size = EVP_MD_CTX_size(self->ctx);
     return PyLong_FromLong(size);
 }
 
@@ -310,7 +374,7 @@ EVP_tp_init(EVPobject *self, PyObject *args, PyObject *kwds)
             PyBuffer_Release(&view);
         return -1;
     }
-    EVP_DigestInit(&self->ctx, digest);
+    EVP_DigestInit(self->ctx, digest);
 
     self->name = name_obj;
     Py_INCREF(self->name);
@@ -407,9 +471,9 @@ EVPnew(PyObject *name_obj,
         return NULL;
 
     if (initial_ctx) {
-        EVP_MD_CTX_copy(&self->ctx, initial_ctx);
+        EVP_MD_CTX_copy(self->ctx, initial_ctx);
     } else {
-        EVP_DigestInit(&self->ctx, digest);
+        EVP_DigestInit(self->ctx, digest);
     }
 
     if (cp && len) {
@@ -475,6 +539,7 @@ EVP_new(PyObject *self, PyObject *args, PyObject *kwdict)
 
 #define PY_PBKDF2_HMAC 1
 
+#if !HAS_FAST_PKCS5_PBKDF2_HMAC
 /* Improved implementation of PKCS5_PBKDF2_HMAC()
  *
  * PKCS5_PBKDF2_HMAC_fast() hashes the password exactly one time instead of
@@ -556,37 +621,8 @@ PKCS5_PBKDF2_HMAC_fast(const char *pass, int passlen,
     HMAC_CTX_cleanup(&hctx_tpl);
     return 1;
 }
+#endif
 
-/* LCOV_EXCL_START */
-static PyObject *
-_setException(PyObject *exc)
-{
-    unsigned long errcode;
-    const char *lib, *func, *reason;
-
-    errcode = ERR_peek_last_error();
-    if (!errcode) {
-        PyErr_SetString(exc, "unknown reasons");
-        return NULL;
-    }
-    ERR_clear_error();
-
-    lib = ERR_lib_error_string(errcode);
-    func = ERR_func_error_string(errcode);
-    reason = ERR_reason_error_string(errcode);
-
-    if (lib && func) {
-        PyErr_Format(exc, "[%s: %s] %s", lib, func, reason);
-    }
-    else if (lib) {
-        PyErr_Format(exc, "[%s] %s", lib, reason);
-    }
-    else {
-        PyErr_SetString(exc, reason);
-    }
-    return NULL;
-}
-/* LCOV_EXCL_STOP */
 
 PyDoc_STRVAR(pbkdf2_hmac__doc__,
 "pbkdf2_hmac(hash_name, password, salt, iterations, dklen=None) -> key\n\
@@ -668,10 +704,17 @@ pbkdf2_hmac(PyObject *self, PyObject *args, PyObject *kwdict)
     key = PyBytes_AS_STRING(key_obj);
 
     Py_BEGIN_ALLOW_THREADS
+#if HAS_FAST_PKCS5_PBKDF2_HMAC
+    retval = PKCS5_PBKDF2_HMAC((char*)password.buf, (int)password.len,
+                               (unsigned char *)salt.buf, (int)salt.len,
+                               iterations, digest, dklen,
+                               (unsigned char *)key);
+#else
     retval = PKCS5_PBKDF2_HMAC_fast((char*)password.buf, (int)password.len,
                                     (unsigned char *)salt.buf, (int)salt.len,
                                     iterations, digest, dklen,
                                     (unsigned char *)key);
+#endif
     Py_END_ALLOW_THREADS
 
     if (!retval) {
@@ -790,7 +833,7 @@ generate_hash_name_list(void)
     if (CONST_ ## NAME ## _name_obj == NULL) { \
         CONST_ ## NAME ## _name_obj = PyUnicode_FromString(#NAME); \
         if (EVP_get_digestbyname(#NAME)) { \
-            CONST_new_ ## NAME ## _ctx_p = &CONST_new_ ## NAME ## _ctx; \
+            CONST_new_ ## NAME ## _ctx_p = EVP_MD_CTX_new(); \
             EVP_DigestInit(CONST_new_ ## NAME ## _ctx_p, EVP_get_digestbyname(#NAME)); \
         } \
     } \
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 0ff9d553e2a..512e5f10cef 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -55,6 +55,14 @@ static PySocketModule_APIObject PySocketModule;
 #include <sys/poll.h>
 #endif
 
+/* Don't warn about deprecated functions */
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 /* Include OpenSSL header files */
 #include "openssl/rsa.h"
 #include "openssl/crypto.h"
@@ -90,6 +98,10 @@ struct py_ssl_library_code {
 /* Include generated data (error codes) */
 #include "_ssl_data.h"
 
+#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER)
+#  define OPENSSL_VERSION_1_1 1
+#endif
+
 /* Openssl comes with TLSv1.1 and TLSv1.2 between 1.0.0h and 1.0.1
     http://www.openssl.org/news/changelog.html
  */
@@ -108,6 +120,80 @@ struct py_ssl_library_code {
 # define HAVE_SNI 0
 #endif
 
+#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
+# define HAVE_ALPN
+#endif
+
+#ifndef INVALID_SOCKET /* MS defines this */
+#define INVALID_SOCKET (-1)
+#endif
+
+#ifdef OPENSSL_VERSION_1_1
+/* OpenSSL 1.1.0+ */
+#ifndef OPENSSL_NO_SSL2
+#define OPENSSL_NO_SSL2
+#endif
+#else /* OpenSSL < 1.1.0 */
+#if defined(WITH_THREAD)
+#define HAVE_OPENSSL_CRYPTO_LOCK
+#endif
+
+#define TLS_method SSLv23_method
+
+static int X509_NAME_ENTRY_set(const X509_NAME_ENTRY *ne)
+{
+    return ne->set;
+}
+
+#ifndef OPENSSL_NO_COMP
+static int COMP_get_type(const COMP_METHOD *meth)
+{
+    return meth->type;
+}
+
+static const char *COMP_get_name(const COMP_METHOD *meth)
+{
+    return meth->name;
+}
+#endif
+
+static pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
+{
+    return ctx->default_passwd_callback;
+}
+
+static void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
+{
+    return ctx->default_passwd_callback_userdata;
+}
+
+static int X509_OBJECT_get_type(X509_OBJECT *x)
+{
+    return x->type;
+}
+
+static X509 *X509_OBJECT_get0_X509(X509_OBJECT *x)
+{
+    return x->data.x509;
+}
+
+static int BIO_up_ref(BIO *b)
+{
+    CRYPTO_add(&b->references, 1, CRYPTO_LOCK_BIO);
+    return 1;
+}
+
+static STACK_OF(X509_OBJECT) *X509_STORE_get0_objects(X509_STORE *store) {
+    return store->objs;
+}
+
+static X509_VERIFY_PARAM *X509_STORE_get0_param(X509_STORE *store)
+{
+    return store->param;
+}
+#endif /* OpenSSL < 1.1.0 or LibreSSL */
+
+
 enum py_ssl_error {
     /* these mirror ssl.h */
     PY_SSL_ERROR_NONE,
@@ -138,7 +224,7 @@ enum py_ssl_cert_requirements {
 enum py_ssl_version {
     PY_SSL_VERSION_SSL2,
     PY_SSL_VERSION_SSL3=1,
-    PY_SSL_VERSION_SSL23,
+    PY_SSL_VERSION_TLS,
 #if HAVE_TLSv1_2
     PY_SSL_VERSION_TLS1,
     PY_SSL_VERSION_TLS1_1,
@@ -504,7 +590,7 @@ newPySSLSocket(PySSLContext *sslctx, PySocketSockObject *sock,
     PySSL_BEGIN_ALLOW_THREADS
     self->ssl = SSL_new(ctx);
     PySSL_END_ALLOW_THREADS
-    SSL_set_app_data(self->ssl,self);
+    SSL_set_app_data(self->ssl, self);
     SSL_set_fd(self->ssl, Py_SAFE_DOWNCAST(sock->sock_fd, SOCKET_T, int));
     mode = SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER;
 #ifdef SSL_MODE_AUTO_RETRY
@@ -691,7 +777,7 @@ _create_tuple_for_X509_NAME (X509_NAME *xname)
 
         /* check to see if we've gotten to a new RDN */
         if (rdn_level >= 0) {
-            if (rdn_level != entry->set) {
+            if (rdn_level != X509_NAME_ENTRY_set(entry)) {
                 /* yes, new RDN */
                 /* add old RDN to DN */
                 rdnt = PyList_AsTuple(rdn);
@@ -708,7 +794,7 @@ _create_tuple_for_X509_NAME (X509_NAME *xname)
                     goto fail0;
             }
         }
-        rdn_level = entry->set;
+        rdn_level = X509_NAME_ENTRY_set(entry);
 
         /* now add this attribute to the current RDN */
         name = X509_NAME_ENTRY_get_object(entry);
@@ -811,18 +897,18 @@ _get_peer_alt_names (X509 *certificate) {
             goto fail;
         }
 
-        p = ext->value->data;
+        p = X509_EXTENSION_get_data(ext)->data;
         if (method->it)
             names = (GENERAL_NAMES*)
               (ASN1_item_d2i(NULL,
                              &p,
-                             ext->value->length,
+                             X509_EXTENSION_get_data(ext)->length,
                              ASN1_ITEM_ptr(method->it)));
         else
             names = (GENERAL_NAMES*)
               (method->d2i(NULL,
                            &p,
-                           ext->value->length));
+                           X509_EXTENSION_get_data(ext)->length));
 
         for(j = 0; j < sk_GENERAL_NAME_num(names); j++) {
             /* get a rendering of each name in the set of names */
@@ -1033,13 +1119,11 @@ _get_crl_dp(X509 *certificate) {
     int i, j;
     PyObject *lst, *res = NULL;
 
-#if OPENSSL_VERSION_NUMBER < 0x10001000L
-    dps = X509_get_ext_d2i(certificate, NID_crl_distribution_points, NULL, NULL);
-#else
+#if OPENSSL_VERSION_NUMBER >= 0x10001000L
     /* Calls x509v3_cache_extensions and sets up crldp */
     X509_check_ca(certificate);
-    dps = certificate->crldp;
 #endif
+    dps = X509_get_ext_d2i(certificate, NID_crl_distribution_points, NULL, NULL);
 
     if (dps == NULL)
         return Py_None;
@@ -1431,9 +1515,9 @@ static PyObject *PySSL_compression(PySSLSocket *self) {
     if (self->ssl == NULL)
         Py_RETURN_NONE;
     comp_method = SSL_get_current_compression(self->ssl);
-    if (comp_method == NULL || comp_method->type == NID_undef)
+    if (comp_method == NULL || COMP_get_type(comp_method) == NID_undef)
         Py_RETURN_NONE;
-    short_name = OBJ_nid2sn(comp_method->type);
+    short_name = COMP_get_name(comp_method);
     if (short_name == NULL)
         Py_RETURN_NONE;
     return PyUnicode_DecodeFSDefault(short_name);
@@ -1981,7 +2065,7 @@ context_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
     char *kwlist[] = {"protocol", NULL};
     PySSLContext *self;
-    int proto_version = PY_SSL_VERSION_SSL23;
+    int proto_version = PY_SSL_VERSION_TLS;
     long options;
     SSL_CTX *ctx = NULL;
 
@@ -2007,8 +2091,8 @@ context_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
     else if (proto_version == PY_SSL_VERSION_SSL2)
         ctx = SSL_CTX_new(SSLv2_method());
 #endif
-    else if (proto_version == PY_SSL_VERSION_SSL23)
-        ctx = SSL_CTX_new(SSLv23_method());
+    else if (proto_version == PY_SSL_VERSION_TLS)
+        ctx = SSL_CTX_new(TLS_method());
     else
         proto_version = -1;
     PySSL_END_ALLOW_THREADS
@@ -2051,8 +2135,9 @@ context_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 #ifndef OPENSSL_NO_ECDH
     /* Allow automatic ECDH curve selection (on OpenSSL 1.0.2+), or use
        prime256v1 by default.  This is Apache mod_ssl's initialization
-       policy, so we should be safe. */
-#if defined(SSL_CTX_set_ecdh_auto)
+       policy, so we should be safe. OpenSSL 1.1 has it enabled by default.
+     */
+#if defined(SSL_CTX_set_ecdh_auto) && !defined(OPENSSL_VERSION_1_1)
     SSL_CTX_set_ecdh_auto(self->ctx, 1);
 #else
     {
@@ -2263,10 +2348,12 @@ static PyObject *
 get_verify_flags(PySSLContext *self, void *c)
 {
     X509_STORE *store;
+    X509_VERIFY_PARAM *param;
     unsigned long flags;
 
     store = SSL_CTX_get_cert_store(self->ctx);
-    flags = X509_VERIFY_PARAM_get_flags(store->param);
+    param = X509_STORE_get0_param(store);
+    flags = X509_VERIFY_PARAM_get_flags(param);
     return PyLong_FromUnsignedLong(flags);
 }
 
@@ -2274,22 +2361,24 @@ static int
 set_verify_flags(PySSLContext *self, PyObject *arg, void *c)
 {
     X509_STORE *store;
+    X509_VERIFY_PARAM *param;
     unsigned long new_flags, flags, set, clear;
 
     if (!PyArg_Parse(arg, "k", &new_flags))
         return -1;
     store = SSL_CTX_get_cert_store(self->ctx);
-    flags = X509_VERIFY_PARAM_get_flags(store->param);
+    param = X509_STORE_get0_param(store);
+    flags = X509_VERIFY_PARAM_get_flags(param);
     clear = flags & ~new_flags;
     set = ~flags & new_flags;
     if (clear) {
-        if (!X509_VERIFY_PARAM_clear_flags(store->param, clear)) {
+        if (!X509_VERIFY_PARAM_clear_flags(param, clear)) {
             _setSSLError(NULL, 0, __FILE__, __LINE__);
             return -1;
         }
     }
     if (set) {
-        if (!X509_VERIFY_PARAM_set_flags(store->param, set)) {
+        if (!X509_VERIFY_PARAM_set_flags(param, set)) {
             _setSSLError(NULL, 0, __FILE__, __LINE__);
             return -1;
         }
@@ -2459,8 +2548,8 @@ load_cert_chain(PySSLContext *self, PyObject *args, PyObject *kwds)
     char *kwlist[] = {"certfile", "keyfile", "password", NULL};
     PyObject *certfile, *keyfile = NULL, *password = NULL;
     PyObject *certfile_bytes = NULL, *keyfile_bytes = NULL;
-    pem_password_cb *orig_passwd_cb = self->ctx->default_passwd_callback;
-    void *orig_passwd_userdata = self->ctx->default_passwd_callback_userdata;
+    pem_password_cb *orig_passwd_cb = SSL_CTX_get_default_passwd_cb(self->ctx);
+    void *orig_passwd_userdata = SSL_CTX_get_default_passwd_cb_userdata(self->ctx);
     _PySSLPasswordInfo pw_info = { NULL, NULL, NULL, 0, 0 };
     int r;
 
@@ -2591,8 +2680,9 @@ _add_ca_certs(PySSLContext *self, void *data, Py_ssize_t len,
             cert = d2i_X509_bio(biobuf, NULL);
         } else {
             cert = PEM_read_bio_X509(biobuf, NULL,
-                                     self->ctx->default_passwd_callback,
-                                     self->ctx->default_passwd_callback_userdata);
+                                     SSL_CTX_get_default_passwd_cb(self->ctx),
+                                     SSL_CTX_get_default_passwd_cb_userdata(self->ctx)
+                                    );
         }
         if (cert == NULL) {
             break;
@@ -3040,25 +3130,24 @@ static PyObject *
 cert_store_stats(PySSLContext *self)
 {
     X509_STORE *store;
+    STACK_OF(X509_OBJECT) *objs;
     X509_OBJECT *obj;
-    int x509 = 0, crl = 0, pkey = 0, ca = 0, i;
+    int x509 = 0, crl = 0, ca = 0, i;
 
     store = SSL_CTX_get_cert_store(self->ctx);
-    for (i = 0; i < sk_X509_OBJECT_num(store->objs); i++) {
-        obj = sk_X509_OBJECT_value(store->objs, i);
-        switch (obj->type) {
+    objs = X509_STORE_get0_objects(store);
+    for (i = 0; i < sk_X509_OBJECT_num(objs); i++) {
+        obj = sk_X509_OBJECT_value(objs, i);
+        switch (X509_OBJECT_get_type(obj)) {
             case X509_LU_X509:
                 x509++;
-                if (X509_check_ca(obj->data.x509)) {
+                if (X509_check_ca(X509_OBJECT_get0_X509(obj))) {
                     ca++;
                 }
                 break;
             case X509_LU_CRL:
                 crl++;
                 break;
-            case X509_LU_PKEY:
-                pkey++;
-                break;
             default:
                 /* Ignore X509_LU_FAIL, X509_LU_RETRY, X509_LU_PKEY.
                  * As far as I can tell they are internal states and never
@@ -3083,6 +3172,7 @@ get_ca_certs(PySSLContext *self, PyObject *args, PyObject *kwds)
 {
     char *kwlist[] = {"binary_form", NULL};
     X509_STORE *store;
+    STACK_OF(X509_OBJECT) *objs;
     PyObject *ci = NULL, *rlist = NULL;
     int i;
     int binary_mode = 0;
@@ -3097,17 +3187,18 @@ get_ca_certs(PySSLContext *self, PyObject *args, PyObject *kwds)
     }
 
     store = SSL_CTX_get_cert_store(self->ctx);
-    for (i = 0; i < sk_X509_OBJECT_num(store->objs); i++) {
+    objs = X509_STORE_get0_objects(store);
+    for (i = 0; i < sk_X509_OBJECT_num(objs); i++) {
         X509_OBJECT *obj;
         X509 *cert;
 
-        obj = sk_X509_OBJECT_value(store->objs, i);
-        if (obj->type != X509_LU_X509) {
+        obj = sk_X509_OBJECT_value(objs, i);
+        if (X509_OBJECT_get_type(obj) != X509_LU_X509) {
             /* not a x509 cert */
             continue;
         }
         /* CA for any purpose */
-        cert = obj->data.x509;
+        cert = X509_OBJECT_get0_X509(obj);
         if (!X509_check_ca(cert)) {
             continue;
         }
@@ -3780,10 +3871,12 @@ static PyMethodDef PySSL_methods[] = {
 };
 
 
-#ifdef WITH_THREAD
+#ifdef HAVE_OPENSSL_CRYPTO_LOCK
 
 /* an implementation of OpenSSL threading operations in terms
-   of the Python C thread library */
+ * of the Python C thread library
+ * Only used up to 1.0.2. OpenSSL 1.1.0+ has its own locking code.
+ */
 
 static PyThread_type_lock *_ssl_locks = NULL;
 
@@ -3864,7 +3957,7 @@ static int _setup_ssl_threads(void) {
     return 1;
 }
 
-#endif  /* def HAVE_THREAD */
+#endif  /* HAVE_OPENSSL_CRYPTO_LOCK for WITH_THREAD && OpenSSL < 1.1.0 */
 
 PyDoc_STRVAR(module_doc,
 "Implementation module for SSL socket operations.  See the socket module\n\
@@ -3931,11 +4024,16 @@ PyInit__ssl(void)
     SSL_load_error_strings();
     SSL_library_init();
 #ifdef WITH_THREAD
+#ifdef HAVE_OPENSSL_CRYPTO_LOCK
     /* note that this will start threading if not already started */
     if (!_setup_ssl_threads()) {
         return NULL;
     }
+#elif OPENSSL_VERSION_1_1 && defined(OPENSSL_THREADS)
+    /* OpenSSL 1.1.0 builtin thread support is enabled */
+    _ssl_locks_count++;
 #endif
+#endif  /* WITH_THREAD */
     OpenSSL_add_all_algorithms();
 
     /* Add symbols to module dict */
@@ -4079,7 +4177,9 @@ PyInit__ssl(void)
                             PY_SSL_VERSION_SSL3);
 #endif
     PyModule_AddIntConstant(m, "PROTOCOL_SSLv23",
-                            PY_SSL_VERSION_SSL23);
+                            PY_SSL_VERSION_TLS);
+    PyModule_AddIntConstant(m, "PROTOCOL_TLS",
+                            PY_SSL_VERSION_TLS);
     PyModule_AddIntConstant(m, "PROTOCOL_TLSv1",
                             PY_SSL_VERSION_TLS1);
 #if HAVE_TLSv1_2