EVP_CIPHER-SEED(7ossl)

📦
version 15.1 · 3 versions
, in freebsd 15.1

💜 EVP_CIPHER-SEED — like, the whole SEED EVP_CIPHER situation

okay bestie, real talk: this is the 7ossl manual page from OpenSSL, and it's all about the SEED symmetric encryption implementations. yes, SEED. the cipher. she's legacy, she's iconic, let's get into it 🎀

✨ NAME ✨

EVP_CIPHER-SEED — the SEED EVP_CIPHER implementations, that's the whole vibe 🦋

🌸 DESCRIPTION 🌸

So, support for SEED symmetric encryption using the EVP_CIPHER API. That's it, that's the tea. she does symmetric encryption through the EVP_CIPHER API and she does it well 💅

🌈 Algorithm Names

okay so here's the thing — the following algorithms are available in the legacy provider (yes, the legacy one, she lives there now, respect her):

  • "SEED-CBC" or "SEED" — same girl, two names, slay
  • "SEED-ECB" — the ECB one, no cap
  • "SEED-OFB" or "SEED-OFB128" — literally the same thing, she just also answers to her full name
  • "SEED-CFB" or "SEED-CFB128" — again, two names, both valid, pick your fighter

🧚 Parameters

This implementation supports the parameters described in "PARAMETERS" in EVP_EncryptInit(3). that's the reference, go read it, iykyk 🫶

👑 SEE ALSO 👑

like, go click around, the lore is deep ⭐

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>.

ngl, do actually read the license before you go shipping stuff, bestie — it's giving "required reading" but make it legal 😭

and that's the page!! mwah 💋 this was OpenSSL 3.5.6, dated 2026-04-07 — EVP_CIPHER-SEED(7ossl), signing off 🍓✨

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