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-rw-r--r--src/cryptography/hazmat/backends/openssl/hmac.py7
1 files changed, 3 insertions, 4 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/hmac.py b/src/cryptography/hazmat/backends/openssl/hmac.py
index ea834204..3577f477 100644
--- a/src/cryptography/hazmat/backends/openssl/hmac.py
+++ b/src/cryptography/hazmat/backends/openssl/hmac.py
@@ -25,12 +25,11 @@ class _HMACContext(object):
ctx = self._backend._ffi.gc(
ctx, self._backend._lib.Cryptography_HMAC_CTX_free
)
- evp_md = self._backend._lib.EVP_get_digestbyname(
- algorithm.name.encode('ascii'))
+ name = self._backend._build_openssl_digest_name(algorithm)
+ evp_md = self._backend._lib.EVP_get_digestbyname(name)
if evp_md == self._backend._ffi.NULL:
raise UnsupportedAlgorithm(
- "{0} is not a supported hash on this backend.".format(
- algorithm.name),
+ "{0} is not a supported hash on this backend".format(name),
_Reasons.UNSUPPORTED_HASH
)
res = self._backend._lib.HMAC_Init_ex(