STRUCT SA_TFM_CTX(9)

✨ struct sa_tfm_ctx(9) ✨

okay bestie, welcome to the struct sa_tfm_ctx page from the Kernel API Manual — this is the TFM context structure and she is literally the main character of your crypto transform setup 🎀

💖 NAME 💖

struct sa_tfm_ctx — the TFM context structure, no cap

🦋 SYNOPSIS 🦋

struct sa_tfm_ctx {
    struct sa_crypto_data *dev_data;
    struct sa_ctx_info enc;
    struct sa_ctx_info dec;
    struct sa_ctx_info auth;
    int keylen;
    int iv_idx;
    u32 key[AES_KEYSIZE_256 / sizeof(u32)];
    u8 authkey[SHA512_BLOCK_SIZE];
    struct crypto_shash     *shash;
    union {
      struct crypto_skcipher          *skcipher;
      struct crypto_ahash             *ahash;
      struct crypto_aead              *aead;
    } fallback;
 };

look at her. gorgeous. every field exactly where it belongs 💅

🌸 Members 🌸

• dev_data — a struct sa_crypto_data pointer, she's the plug that connects you to the device data 🫶
• enc — a struct sa_ctx_info for encryption, iykyk 🔥
• dec — a struct sa_ctx_info for decryption, the mirror twin ✨
• auth — a struct sa_ctx_info for authentication 🌈
• keylen — the encryption/decryption keylength, like how long the key is 🎀
• iv_idx — the Initialization vector index 👑
• key — the encryption key itself, guard her with your life 💀
• fallback — the SW fallback algorithm. and bestie, note the union down there: it can be a struct crypto_skcipher *skcipher, a struct crypto_ahash *ahash, or a struct crypto_aead *aead — pick your fighter ⭐

💜 SEE ALSO 💜

• Kernel file ./drivers/crypto/sa2ul.h struct sa_crypto_data(9)
• struct sa_cmdl_param_info(9)
• struct sa_cmdl_upd_info(9)
• struct sa_ctx_info(9)
• struct sa_sha_req_ctx(9)
• struct sa_eng_info(9)

and that's the whole vibe, bestie 💖 she lives in ./drivers/crypto and this page is dated October 2026 — go read the SEE ALSOs, they're all connected fr fr 🧚✨