EVP\_MD-NULL(7ossl) OpenSSL EVP\_MD-NULL(7ossl)

# [NAME](#NAME)

EVP\_MD-NULL - The NULL EVP\_MD implementation

# [DESCRIPTION](#DESCRIPTION)

Support for a NULL digest through the **EVP\_MD** API. This algorithm does nothing and returns 1 for its init, update and final methods.

## [Algorithm Name](#Algorithm_Name)

The following algorithm is available in the default provider:

"NULL"

## [Gettable Parameters](#Gettable_Parameters)

This implementation supports the common gettable parameters described in [**EVP\_MD-common**(7)](/man/os/openssl/EVP_MD-common.7).

# [SEE ALSO](#SEE_ALSO)

[**EVP\_MD\_CTX\_set\_params**(3)](/man/os/openssl/EVP_MD_CTX_set_params.3), [**provider-digest**(7)](/man/os/openssl/provider-digest.7), [**OSSL\_PROVIDER-default**(7)](/man/os/openssl/OSSL_PROVIDER-default.7)

# [COPYRIGHT](#COPYRIGHT)

Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.

2026-09-29 3.6.5

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Document: EVP_MD-NULL(7ossl) from openssl 3.6.5-r1 (Chainguard OS)
Source: https://github.com/openssl/openssl