---
name: "EVP_rc2_cbc"
section: "3ssl"
platform: "linux"
package: "openssl"
version: "3.6.5-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/EVP_rc2_cbc"
---

# EVP\_rc2\_cbc(3ssl)

EVP RC2 cipher

## NAME

EVP\_rc2\_cbc, EVP\_rc2\_cfb, EVP\_rc2\_cfb64, EVP\_rc2\_ecb, EVP\_rc2\_ofb, EVP\_rc2\_40\_cbc, EVP\_rc2\_64\_cbc - EVP RC2 cipher

## SYNOPSIS

```
 #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

The RC2 encryption algorithm for EVP.

- **EVP\_rc2\_cbc()**, **EVP\_rc2\_cfb()**, **EVP\_rc2\_cfb64()**, **EVP\_rc2\_ecb()**, **EVP\_rc2\_ofb()**

  RC2 encryption algorithm in CBC, CFB, ECB and OFB modes respectively. This is 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.

- **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

Developers 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)](/crypto/7.md) for further information.

## 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.

## SEE ALSO

**evp**(7), **EVP\_EncryptInit**(3), **EVP\_CIPHER\_meth\_new**(3)

## 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\>.