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📜 NAME

EVP_CIPHER-IDEA - The IDEA EVP_CIPHER implementations

🚀 Quick Reference

Use Case	Command	Description
🔐 Encrypt file with IDEA-CBC (CLI)	openssl enc -idea-cbc -in file -out file.enc -K hexkey -iv hexiv	Encrypt file using IDEA-CBC with given key and IV
📦 Fetch IDEA-CBC cipher in EVP	EVP_CIPHER *c = EVP_CIPHER_fetch(NULL, "IDEA-CBC", NULL);	Obtain IDEA-CBC cipher object for EVP operations
⚙️ Initialize encryption context	EVP_EncryptInit_ex(ctx, cipher, NULL, key, iv);	Start IDEA-CBC encryption using the fetched cipher
🔍 List available IDEA modes	openssl list -cipher-algorithms | grep IDEA	Verify which IDEA variants are loaded from the legacy provider

📖 DESCRIPTION

Support for IDEA symmetric encryption using the EVP_CIPHER API.

🧩 Algorithm Names

The following algorithms are available in the legacy provider:

• IDEA-ECB
• IDEA-CBC
• IDEA-OFB or IDEA-OFB64
• IDEA-CFB or IDEA-CFB64

⚙️ 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>.

📜 NAME 🚀 Quick Reference 📖 DESCRIPTION 📚 SEE ALSO ©️ COPYRIGHT