4 files changed, 27 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/x509.py b/src/cryptography/hazmat/backends/openssl/x509.py
index 25cb5704..4ba66bb7 100644
--- a/src/cryptography/hazmat/backends/openssl/x509.py
+++ b/src/cryptography/hazmat/backends/openssl/x509.py
@@ -145,6 +145,16 @@ class _Certificate(object):
         self._backend = backend
         self._x509 = x509
 
+    def __eq__(self, other):
+        if not isinstance(other, x509.Certificate):
+            return NotImplemented
+
+        res = self._backend._lib.X509_cmp(self._x509, other._x509)
+        return res == 0
+
+    def __ne__(self, other):
+        return not self == other
+
     def fingerprint(self, algorithm):
         h = hashes.Hash(algorithm, self._backend)
         bio = self._backend._create_mem_bio()
diff --git a/src/cryptography/hazmat/bindings/openssl/ssl.py b/src/cryptography/hazmat/bindings/openssl/ssl.py
index b182180f..4a824ae5 100644
--- a/src/cryptography/hazmat/bindings/openssl/ssl.py
+++ b/src/cryptography/hazmat/bindings/openssl/ssl.py
@@ -211,6 +211,9 @@ int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
 int SSL_CTX_use_PrivateKey(SSL_CTX *, EVP_PKEY *);
 int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
 int SSL_CTX_check_private_key(const SSL_CTX *);
+void SSL_CTX_set_cert_verify_callback(SSL_CTX *,
+                                      int (*)(X509_STORE_CTX *,void *),
+                                      void *);
 
 void SSL_CTX_set_cert_store(SSL_CTX *, X509_STORE *);
 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *);
diff --git a/src/cryptography/hazmat/bindings/openssl/x509.py b/src/cryptography/hazmat/bindings/openssl/x509.py
index b5c9ee14..a1fb7ffb 100644
--- a/src/cryptography/hazmat/bindings/openssl/x509.py
+++ b/src/cryptography/hazmat/bindings/openssl/x509.py
@@ -115,6 +115,7 @@ FUNCTIONS = """
 X509 *X509_new(void);
 void X509_free(X509 *);
 X509 *X509_dup(X509 *);
+int X509_cmp(const X509 *, const X509 *);
 
 int X509_print_ex(BIO *, X509 *, unsigned long, unsigned long);
 
@@ -140,6 +141,7 @@ int X509_set_issuer_name(X509 *, X509_NAME *);
 
 int X509_get_ext_count(X509 *);
 int X509_add_ext(X509 *, X509_EXTENSION *, int);
+X509_EXTENSION *X509_delete_ext(X509 *, int);
 X509_EXTENSION *X509_EXTENSION_dup(X509_EXTENSION *);
 X509_EXTENSION *X509_get_ext(X509 *, int);
 int X509_get_ext_by_NID(X509 *, int, int);
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index dd6ea926..b22ac8be 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -730,6 +730,18 @@ class Certificate(object):
         in the certificate.
         """
 
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Checks equality.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Checks not equal.
+        """
+
 
 @six.add_metaclass(abc.ABCMeta)
 class CertificateSigningRequest(object):