sha384.h File Reference

SHA-384 (FIPS 180-4) - streaming and one-shot digest. More...

#include "protocore_config.h"

Go to the source code of this file.

Classes
struct	Sha384Ns
	Dispatch table. Addressed by offset, so the layout is asserted below. More...

Macros
#define	PROTOCORE_SHA384_DIGEST_LEN   48
	SHA-384 digest length in bytes.
#define	PROTOCORE_SHA384_BLOCK_LEN   128
	SHA-384 block size in bytes.

Functions
	PROTOCORE_NS_LAYOUT (Sha384Ns, init, update, final, hash)
proto_bool	protocore_sha384_init (uint8_t *work)
	Start a digest.
proto_bool	protocore_sha384_update (uint8_t *work, const uint8_t *data, size_t len)
	Feed the running digest a chunk.
proto_bool	protocore_sha384_final (uint8_t *work, uint8_t *out)
	Pad, compress the last block, write the 48 bytes out.
proto_bool	protocore_sha384_hash (uint8_t *work, const uint8_t *data, size_t len, uint8_t *out)
	Init, update and final in one call, for a message already whole.

Variables
PROTOCORE_NS Sha384Ns Sha384	PROTOCORE_UNUSED
	Module namespace.

Detailed Description

SHA-384 (FIPS 180-4) - streaming and one-shot digest.

The SHA-384 primitive: the TLS 1.3 SHA-384 cipher suites hash their transcript and run their key schedule on it. The entries below are one surface over both arms: a part with a hashing peripheral compresses on it, a part without runs the FIPS 180-4 rounds. Mirrors the sha512 structure at the SHA-384 seed and digest length.

Sha384Ns::final leaves the running digest where it was: the padded blocks compress into a copy of the state, so the hash keeps taking data afterwards. That is what lets a TLS transcript be read at every stage the handshake asks for without snapshotting anything.

work is PROTOCORE_SHA384_BORROW secure bytes the CALLER took, at an address it knows. It is not held past the call, so nothing here aliases it. The caller releases it, and the pool wipes on release; this module neither takes it, holds it, releases it, nor wipes it. The borrow IS the digest, so two running hashes are two borrows and never collide.

Author

Douglas Quigg (dstroy0)

Date

2026

Definition in file sha384.h.

Macro Definition Documentation

PROTOCORE_SHA384_DIGEST_LEN

#define PROTOCORE_SHA384_DIGEST_LEN   48

SHA-384 digest length in bytes.

Definition at line 34 of file sha384.h.

PROTOCORE_SHA384_BLOCK_LEN

#define PROTOCORE_SHA384_BLOCK_LEN   128

SHA-384 block size in bytes.

Definition at line 37 of file sha384.h.

Function Documentation

PROTOCORE_NS_LAYOUT()

PROTOCORE_NS_LAYOUT	(	Sha384Ns	,
		init	,
		update	,
		final	,
		hash
	)

protocore_sha384_init()

proto_bool protocore_sha384_init

(

uint8_t *

work

)

Start a digest.

Parameters

work	PROTOCORE_SHA384_BORROW bytes the caller took. Not held past the call.

Returns

PROTO_TRUE on success.

protocore_sha384_update()

proto_bool protocore_sha384_update	(	uint8_t *	work,
		const uint8_t *	data,
		size_t	len
	)

Feed the running digest a chunk.

Parameters

work	PROTOCORE_SHA384_BORROW bytes the caller took. Not held past the call.
data	the bytes
len	how many

Returns

PROTO_TRUE on success.

protocore_sha384_final()

proto_bool protocore_sha384_final	(	uint8_t *	work,
		uint8_t *	out
	)

Pad, compress the last block, write the 48 bytes out.

Parameters

work	PROTOCORE_SHA384_BORROW bytes the caller took. Not held past the call.
out	PROTOCORE_SHA384_DIGEST_LEN bytes

Returns

PROTO_TRUE on success.

protocore_sha384_hash()

proto_bool protocore_sha384_hash	(	uint8_t *	work,
		const uint8_t *	data,
		size_t	len,
		uint8_t *	out
	)

Init, update and final in one call, for a message already whole.

Parameters

work	PROTOCORE_SHA384_BORROW bytes the caller took. Not held past the call.
data	the message
len	its length
out	PROTOCORE_SHA384_DIGEST_LEN bytes

Returns

PROTO_TRUE on success.

Variable Documentation

PROTOCORE_UNUSED

PROTOCORE_NS Sha384Ns Sha384 PROTOCORE_UNUSED

Initial value:

= {.init = protocore_sha384_init,
                                                 .update = protocore_sha384_update,
                                                 .final = protocore_sha384_final,
                                                 .hash = protocore_sha384_hash}

Module namespace.

Definition at line 81 of file sha384.h.