From 8317698f9bce2ff879acead9f5b02d5959ca8fa2 Mon Sep 17 00:00:00 2001
From: Thomas Waldmann <tw@waldmann-edv.de>
Date: Sat, 5 Mar 2022 21:22:24 +0100
Subject: [PATCH] hmac_sha256: replace own cython wrapper code by hmac.digest
 python stdlib (since py38)

i measured performance of both: pretty much the same.
---
 src/borg/crypto/low_level.pyx | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/src/borg/crypto/low_level.pyx b/src/borg/crypto/low_level.pyx
index f726f3150..b43d4a79f 100644
--- a/src/borg/crypto/low_level.pyx
+++ b/src/borg/crypto/low_level.pyx
@@ -754,18 +754,7 @@ cdef class AES:
 
 
 def hmac_sha256(key, data):
-    cdef Py_buffer data_buf = ro_buffer(data)
-    cdef const unsigned char *key_ptr = key
-    cdef int key_len = len(key)
-    cdef unsigned char md[32]
-    try:
-        with nogil:
-            rc = HMAC(EVP_sha256(), key_ptr, key_len, <const unsigned char*> data_buf.buf, data_buf.len, md, NULL)
-        if rc != md:
-            raise CryptoError('HMAC(EVP_sha256) failed')
-    finally:
-        PyBuffer_Release(&data_buf)
-    return PyBytes_FromStringAndSize(<char*> &md[0], 32)
+    return hmac.digest(key, data, 'sha256')
 
 
 def blake2b_256(key, data):