STRUCT SHA1_CTX(9)

👑 struct sha1_ctx 👑

okay so this is the struct sha1_ctx(9) page from the Kernel API Manual, and it’s literally the context for hashing a message with SHA-1 💅

🌸 NAME 🌸

struct sha1_ctx — Context for hashing a message with SHA-1. periodt.

✨ SYNOPSIS ✨

the literal shape, bestie:

       struct sha1_ctx {
           struct sha1_block_state state;
           u64 bytecount;
           u8 buf[SHA1_BLOCK_SIZE];
        };

🎀 Members 🎀

• state — the compression function state. iconic.
• bytecount — number of bytes processed so far. keeping count, no cap.
• buf — partial block buffer; bytecount % SHA1_BLOCK_SIZE bytes are valid. the remaining bytes are just vibing in the buffer.

🔥 SEE ALSO 🔥

Kernel file ./include/crypto/sha1.h is the spot, and these linked besties are all here:

• sha1_init(9)
• sha1_update(9)
• sha1_final(9)
• sha1(9)
• struct hmac_sha1_key(9)
• struct hmac_sha1_ctx(9)
• hmac_sha1_preparekey(9)
• hmac_sha1_init(9)
• hmac_sha1_init_usingrawkey(9)
• hmac_sha1_update(9)
• hmac_sha1_final(9)
• hmac_sha1(9)
• hmac_sha1_usingrawkey(9)

source/version line: ./include/crypto — dated October 2026 — for struct sha1_ctx(9). mwah 💜🫶