des3_ede_expand_key(9)

🎀 des3_ede_expand_key(9) 🎀

okay so bestie, welcome to the Kernel API Manual — this one's all about des3_ede_expand_key, and it's literally the glow-up era for your triple DES key ✨

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✨ NAME ✨

des3_ede_expand_key — expands a triple DES input key into a key schedule, no cap 💅

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🌸 SYNOPSIS 🌸

int des3_ede_expand_key (struct des3_ede_ctx *ctx , const u8 *key ,
unsigned int keylen );

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🦋 ARGUMENTS 🦋

• ctx — the key schedule, aka where the magic lands 🫶
• key — the buffer holding the input key, the main character of this whole operation 👑
• keylen — the size of that buffer's contents, so we know how much key we're working with 🎀

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💖 RETURN 💖

It's giving simple, honestly:

• 0 on success — slay, we ate 🍓
• -EINVAL if the input key is rejected 🙈
• -ENOKEY if the key is accepted but has been found to be weak 💀

⚠️ heads up bestie: weak keys will be rejected (and -EINVAL will be returned) when running in FIPS mode. so like, context matters, iykyk 😭

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🌈 SEE ALSO 🌈

• Kernel file ./include/crypto/des.h
• des_expand_key(9)

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alright that's the whole vibe check — no extra lore, no invented drama. this page came from ./include/crypto and it's dated October 2026, and the title is ofc des3_ede_expand_key(9) 💜 go expand some keys, periodt 🧚