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📖 NAME

EVP_CIPHER-RC5 - The RC5 EVP_CIPHER implementations

🚀 Quick Reference

Use Case	Command	Description
Fetch RC5-CBC cipher	EVP_CIPHER_fetch(NULL, "RC5-CBC", NULL)	Obtain the RC5 CBC cipher implementation
Fetch RC5-ECB cipher	EVP_CIPHER_fetch(NULL, "RC5-ECB", NULL)	Obtain the RC5 ECB cipher implementation
Fetch RC5-OFB cipher	EVP_CIPHER_fetch(NULL, "RC5-OFB", NULL)	Obtain the RC5 OFB cipher implementation
Fetch RC5-CFB cipher	EVP_CIPHER_fetch(NULL, "RC5-CFB", NULL)	Obtain the RC5 CFB cipher implementation
Enable RC5 at build time	enable-rc5	Configure OpenSSL to include RC5 support

📝 DESCRIPTION

Support for RC5 symmetric encryption using the EVP_CIPHER API.

🔒 Disabled by default. Use the enable-rc5 configuration option to enable.

🏷️ Algorithm Names

The following algorithms are available in the legacy provider:

• RC5-CBC or RC5
• RC5-ECB
• RC5-OFB
• RC5-CFB

⚙️ Parameters

This implementation supports the parameters described in "PARAMETERS" in EVP_EncryptInit(3).

🔗 SEE ALSO

• provider-cipher(7)
• OSSL_PROVIDER-legacy(7)

©️ COPYRIGHT

Copyright 2021 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.

3.0.2 2026-06-02 EVP_CIPHER-RC5(7SSL)

📖 NAME 🚀 Quick Reference 📝 DESCRIPTION 🔗 SEE ALSO ©️ COPYRIGHT