Commit 6fa4b292 authored by Eric Biggers's avatar Eric Biggers
Browse files

lib/crypto: sha256: Add sha224() and sha224_update() 



Add a one-shot SHA-224 computation function sha224(), for consistency
with sha256(), sha384(), and sha512() which all already exist.

Similarly, add sha224_update().  While for now it's identical to
sha256_update(), omitting it makes the API harder to use since users
have to "know" which functions are the same between SHA-224 and SHA-256.
Also, this is a prerequisite for using different context types for each.

Acked-by: default avatarArd Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250630160645.3198-6-ebiggers@kernel.org


Signed-off-by: default avatarEric Biggers <ebiggers@kernel.org>
parent 9f97707b

include/crypto/sha2.h

+8 −2
Original line number Diff line number Diff line
@@ -114,18 +114,24 @@ struct sha512_state { 
	u8 buf[SHA512_BLOCK_SIZE];

};



void sha256_update(struct sha256_state *sctx, const u8 *data, size_t len);



static inline void sha224_init(struct sha256_state *sctx)

{

	sha224_block_init(&sctx->ctx);

}

/* Simply use sha256_update as it is equivalent to sha224_update. */

static inline void sha224_update(struct sha256_state *sctx,

				 const u8 *data, size_t len)

{

	sha256_update(sctx, data, len);

}

void sha224_final(struct sha256_state *sctx, u8 out[SHA224_DIGEST_SIZE]);

void sha224(const u8 *data, size_t len, u8 out[SHA224_DIGEST_SIZE]);



static inline void sha256_init(struct sha256_state *sctx)

{

	sha256_block_init(&sctx->ctx);

}

void sha256_update(struct sha256_state *sctx, const u8 *data, size_t len);

void sha256_final(struct sha256_state *sctx, u8 out[SHA256_DIGEST_SIZE]);

void sha256(const u8 *data, size_t len, u8 out[SHA256_DIGEST_SIZE]);

lib/crypto/sha256.c

+10 −0
Original line number Diff line number Diff line
@@ -70,6 +70,16 @@ void sha256_final(struct sha256_state *sctx, u8 out[SHA256_DIGEST_SIZE]) 
}

EXPORT_SYMBOL(sha256_final);



void sha224(const u8 *data, size_t len, u8 out[SHA224_DIGEST_SIZE])

{

	struct sha256_state sctx;



	sha224_init(&sctx);

	sha224_update(&sctx, data, len);

	sha224_final(&sctx, out);

}

EXPORT_SYMBOL(sha224);



void sha256(const u8 *data, size_t len, u8 out[SHA256_DIGEST_SIZE])

{

	struct sha256_state sctx;