EVP_RC2_CBC(3ossl)

💖 NAME 💖

Hii bestie!! 💖 Welcome to the EVP_RC2_CBC(3ossl) manual page — yes, that's the OpenSSL one, and it's all about the EVP RC2 cipher. The whole squad of functions on this page is:

• EVP_rc2_cbc, EVP_rc2_cfb, EVP_rc2_cfb64, EVP_rc2_ecb, EVP_rc2_ofb, EVP_rc2_40_cbc, EVP_rc2_64_cbc — the EVP RC2 cipher 💅

✨ SYNOPSIS ✨

Like, here's the exact include and the function signatures, no cap:

#include <openssl/evp.h>

const EVP_CIPHER *EVP_rc2_cbc(void);
const EVP_CIPHER *EVP_rc2_cfb(void);
const EVP_CIPHER *EVP_rc2_cfb64(void);
const EVP_CIPHER *EVP_rc2_ecb(void);
const EVP_CIPHER *EVP_rc2_ofb(void);
const EVP_CIPHER *EVP_rc2_40_cbc(void);
const EVP_CIPHER *EVP_rc2_64_cbc(void);

🦋 DESCRIPTION 🦋

This is the RC2 encryption algorithm for EVP, bestie.

🌸 The main character functions

• EVP_rc2_cbc(), EVP_rc2_cfb(), EVP_rc2_cfb64(), EVP_rc2_ecb(), EVP_rc2_ofb() — these give you the RC2 encryption algorithm in CBC, CFB, ECB and OFB modes respectively. It's a variable key length cipher with an additional parameter called "effective key bits" or "effective key length". By default both are set to 128 bits. Slay.

🎀 The 40- and 64-bit CBC functions

• EVP_rc2_40_cbc(), EVP_rc2_64_cbc() — RC2 algorithm in CBC mode with a default key length and effective key length of 40 and 64 bits.

🚨 WARNING: these functions are obsolete. Their usage should be replaced with the EVP_rc2_cbc(), EVP_CIPHER_CTX_set_key_length() and EVP_CIPHER_CTX_ctrl() functions to set the key length and effective key length.

⭐ NOTES ⭐

lowkey, devs should be aware of the negative performance implications of calling these functions multiple times, and should consider using EVP_CIPHER_fetch(3) with EVP_CIPHER-RC2(7) instead. See "Performance" in crypto(7) for further information. iykyk 💅

💜 RETURN VALUES 💜

These functions return an EVP_CIPHER structure that contains the implementation of the symmetric cipher. See EVP_CIPHER_meth_new(3) for details of the EVP_CIPHER structure. Periodt. 💅

🌈 SEE ALSO 🌈

• evp(7)
• EVP_EncryptInit(3)
• EVP_CIPHER_meth_new(3)

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👑 COPYRIGHT 👑

Copyright 2017-2023 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>.

Ok bestie, that's the whole page 💖 — OpenSSL version 3.5.0, dated 2026-09-25, signing off with main character energy 🎀✨