EVP_CIPHER-NULL(7ossl)

📦
version 15.1 · 3 versions
, in freebsd 15.1

💅 EVP_CIPHER-NULL (7ossl) 💅

okay so bestie, welcome to the EVP_CIPHER-NULL page — that's the NULL EVP_CIPHER implementation, and yes the name is doing exactly what it says on the tin 🎀

✨ NAME ✨

EVP_CIPHER-NULL — the NULL EVP_CIPHER implementation. that's it, that's the girl 🌸

🦋 DESCRIPTION 🦋

so this is support for a NULL symmetric encryption using the EVP_CIPHER API. it gets used when the TLS cipher suite is TLS_NULL_WITH_NULL_NULL — iykyk 💅

and what does it actually do? literally nothing. no encryption at all, it just copies the data 🫶 and it has a mac size of zero. iconic behaviour, zero notes.

👑 Algorithm Name

the following algorithm is available in the default provider:

  • "NULL"

🎀 Parameters

this implementation supports the following parameters:

⭐ Gettable EVP_CIPHER parameters

see "Gettable EVP_CIPHER parameters" in EVP_EncryptInit(3) — that's where the full tea is ✨

🌈 Gettable EVP_CIPHER_CTX parameters

  • "keylen" (OSSL_CIPHER_PARAM_KEYLEN) <unsigned integer>
  • "ivlen" (OSSL_CIPHER_PARAM_IVLEN and <OSSL_CIPHER_PARAM_AEAD_IVLEN) <unsigned integer>
  • "tls-mac" (OSSL_CIPHER_PARAM_TLS_MAC) <octet ptr>

see "PARAMETERS" in EVP_EncryptInit(3) for further information 💜

🍓 Settable EVP_CIPHER_CTX parameters

  • "tls-mac-size" (OSSL_CIPHER_PARAM_TLS_MAC_SIZE) <unsigned integer>

see "PARAMETERS" in EVP_EncryptInit(3) for further information 💜

📜 CONFORMING TO 📜

RFC 5246 section-6.2.3.1 — she's certified, she's official, periodt 👑

🔥 SEE ALSO 🔥

go read those next bestie, they're giving main character energy fr fr 🌟

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>.

aaaand that's the whole page, no cap 🧚 this was 3.5.6, dated 2026-04-07 — mwah, drink water, and go encrypt something (just not with this one, obviously 😭💀) 🎀💅

📦 where this page comes from