Issue #11746: Fix SSLContext.load_cert_chain() to accept elliptic curve private keys.

Misc/NEWS

@@ -49,6 +49,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #11746: Fix SSLContext.load_cert_chain() to accept elliptic curve
+  private keys.
+
 - sys.getfilesystemencoding() raises a RuntimeError if initfsencoding() was not
   called yet: detect bootstrap (startup) issues earlier.
 

Modules/_ssl.c

@@ -1623,7 +1623,7 @@ load_cert_chain(PySSLContext *self, PyObject *args, PyObject *kwds)
         goto error;
     }
     PySSL_BEGIN_ALLOW_THREADS
-    r = SSL_CTX_use_RSAPrivateKey_file(self->ctx,
+    r = SSL_CTX_use_PrivateKey_file(self->ctx,
         PyBytes_AS_STRING(keyfile ? keyfile_bytes : certfile_bytes),
         SSL_FILETYPE_PEM);
     PySSL_END_ALLOW_THREADS