EVP_MD-COMMON(7ossl)

📦
version 15.1 · 3 versions
, in freebsd 15.1

🎀 NAME 🎀

EVP_MD-common — the common deets for OpenSSL EVP_MD implementations. You’re reading the EVP_MD-COMMON(7ossl) manual page, and it’s giving shared-parameter realness, no cap.

✨ DESCRIPTION ✨

Okay so every single OpenSSL EVP_MD implementation understands the OSSL_PARAM(3) entries that are gettable with EVP_MD_get_params(3), plus the specific ones listed below. Iconic shared behavior, honestly.

  • "blocksize" (OSSL_DIGEST_PARAM_BLOCK_SIZE) — type: <unsigned integer>. This is the digest block size, bestie. The length of the "blocksize" parameter should not exceed that of a size_t. You can also grab this value with EVP_MD_get_block_size(3).
  • "size" (OSSL_DIGEST_PARAM_SIZE) — type: <unsigned integer>. This is the digest output size. The length of the "size" parameter should not exceed that of a size_t. You can also grab this value with EVP_MD_get_size(3).
  • "flags" (OSSL_DIGEST_PARAM_FLAGS) — type: <unsigned integer>. These are diverse flags that describe exceptional behaviour for the digest, and they’re described in "DESCRIPTION" in EVP_MD_meth_set_flags(3). The length of the "flags" parameter should equal that of an unsigned long int. You can also grab this value with EVP_MD_get_flags(3).

🌈 SEE ALSO 🌈

Copyright 2020-2024 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.

mwah 💋 — this icon of a manpage is from OpenSSL 3.5.6, dated 2026-04-07. Stay hydrated and don’t forget your length checks, bestie 🫶✨

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