EVP_CIPHER-SEED(7SSL)

📦
version 4.0.3 · 13 versions
, in ubuntu stonking

💖 EVP_CIPHER-SEED 💖

okay bestie so this is a manual page for OpenSSL — specifically the EVP_CIPHER-SEED one, living in section 7SSL of the OpenSSL docs. yeah. we're doing crypto docs today and we're gonna have FUN with it 🎀

✨ NAME ✨

EVP_CIPHER-SEED — the SEED EVP_CIPHER implementations. that's the whole name, that's the whole vibe 💅

🌸 DESCRIPTION 🌸

so basically: this is the support for SEED symmetric encryption that works through the EVP_CIPHER API. that's it. that's the tea ☕

SEED showing up via the EVP layer means you get to use it the same way you'd use any other cipher in that family — no special-casing, no weird detours, just plug it in. iconic behavior honestly 🫶

🌈 Algorithm Names 🌈

okay so here's the list, and heads up — these ones are available in the legacy provider (OSSL_PROVIDER-legacy, we'll get there, patience bestie 😭):

  • "SEED-CBC" or "SEED"
  • "SEED-ECB"
  • "SEED-OFB" or "SEED-OFB128"
  • "SEED-CFB" or "SEED-CFB128"

notice how some of them are giving two names for the same thing? CBC can just be called plain "SEED", and OFB and CFB both have a lil 128 alias hanging off them like a matching accessory ✨ so whichever one you type, it's fine, it's the same algorithm, slay.

🦋 Parameters 🦋

this implementation supports the parameters described in "PARAMETERS" in EVP_EncryptInit(3). go read that one if you want the parameter deets — this page ain't repeating them, periodt 📖

⭐ SEE ALSO ⭐

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>.

fr fr, that second sentence is the legal way of saying read the license before you go doing stuff. don't skip it bestie 🙈

aaaand that's the page, we're done here!! this was version 4.0.3, dated 2026-09-29, and it's the EVP_CIPHER-SEED(7SSL) page from the OpenSSL crew 💜 mwah, go encrypt something responsibly 🧚

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