Use a non-deprecated OpeNSSL function (#1093)

Author: alex

src/OpenSSL/crypto.py

@@ -174,7 +174,7 @@ def _get_asn1_time(timestamp):
     elif (
         _lib.ASN1_STRING_type(string_timestamp) == _lib.V_ASN1_GENERALIZEDTIME
     ):
-        return _ffi.string(_lib.ASN1_STRING_data(string_timestamp))
+        return _ffi.string(_lib.ASN1_STRING_get0_data(string_timestamp))
     else:
         generalized_timestamp = _ffi.new("ASN1_GENERALIZEDTIME**")
         _lib.ASN1_TIME_to_generalizedtime(timestamp, generalized_timestamp)
@@ -193,7 +193,7 @@ def _get_asn1_time(timestamp):
             string_timestamp = _ffi.cast(
                 "ASN1_STRING*", generalized_timestamp[0]
             )
-            string_data = _lib.ASN1_STRING_data(string_timestamp)
+            string_data = _lib.ASN1_STRING_get0_data(string_timestamp)
             string_result = _ffi.string(string_data)
             _lib.ASN1_GENERALIZEDTIME_free(generalized_timestamp[0])
             return string_result
@@ -715,7 +715,7 @@ def get_components(self):
             # ffi.string does not handle strings containing NULL bytes
             # (which may have been generated by old, broken software)
             value = _ffi.buffer(
-                _lib.ASN1_STRING_data(fval), _lib.ASN1_STRING_length(fval)
+                _lib.ASN1_STRING_get0_data(fval), _lib.ASN1_STRING_length(fval)
             )[:]
             result.append((_ffi.string(name), value))
 
@@ -869,7 +869,7 @@ def get_data(self):
         """
         octet_result = _lib.X509_EXTENSION_get_data(self._extension)
         string_result = _ffi.cast("ASN1_STRING*", octet_result)
-        char_result = _lib.ASN1_STRING_data(string_result)
+        char_result = _lib.ASN1_STRING_get0_data(string_result)
         result_length = _lib.ASN1_STRING_length(string_result)
         return _ffi.buffer(char_result, result_length)[:]