tls13_key_material.h File Reference

TLS 1.3 key schedule. More...

#include "tls.h"

Go to the source code of this file.

Functions
error_t	tls13HkdfExpandLabel (TlsTransportProtocol transportProtocol, const HashAlgo *hash, const uint8_t *secret, size_t secretLen, const char_t *label, const uint8_t *context, size_t contextLen, uint8_t *output, size_t outputLen)
	HKDF-Expand-Label function. More...
error_t	tls13DeriveSecret (TlsContext *context, const uint8_t *secret, size_t secretLen, const char_t *label, const char_t *message, size_t messageLen, uint8_t *output, size_t outputLen)
	Derive-Secret function. More...
error_t	tls13GenerateEarlyTrafficKeys (TlsContext *context)
	Compute early traffic keys. More...
error_t	tls13GenerateHandshakeTrafficKeys (TlsContext *context)
	Compute handshake traffic keys. More...
error_t	tls13GenerateServerAppTrafficKeys (TlsContext *context)
	Compute server application traffic keys. More...
error_t	tls13GenerateClientAppTrafficKeys (TlsContext *context)
	Compute client application traffic keys. More...

Detailed Description

TLS 1.3 key schedule.

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2025 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneSSL Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.5.4

Definition in file tls13_key_material.h.

Function Documentation

tls13DeriveSecret()

error_t tls13DeriveSecret	(	TlsContext *	context,
		const uint8_t *	secret,
		size_t	secretLen,
		const char_t *	label,
		const char_t *	message,
		size_t	messageLen,
		uint8_t *	output,
		size_t	outputLen
	)

Derive-Secret function.

Parameters

[in]	context	Pointer to the TLS context
[in]	secret	Pointer to the secret
[in]	secretLen	Length of the secret
[in]	label	Identifying label (NULL-terminated string)
[in]	message	Concatenation of the indicated handshake messages
[in]	messageLen	Length of the indicated handshake messages
[out]	output	Pointer to the output
[in]	outputLen	Desired output length

Returns

Error code

Definition at line 157 of file tls13_key_material.c.

tls13GenerateClientAppTrafficKeys()

error_t tls13GenerateClientAppTrafficKeys

(

TlsContext *

context

)

Compute client application traffic keys.

Parameters

[in]

context

Pointer to the TLS context

Returns

Error code

Definition at line 792 of file tls13_key_material.c.

tls13GenerateEarlyTrafficKeys()

error_t tls13GenerateEarlyTrafficKeys

(

TlsContext *

context

)

Compute early traffic keys.

Parameters

[in]

context

Pointer to the TLS context

Returns

Error code

Definition at line 214 of file tls13_key_material.c.

tls13GenerateHandshakeTrafficKeys()

error_t tls13GenerateHandshakeTrafficKeys

(

TlsContext *

context

)

Compute handshake traffic keys.

Parameters

[in]

context

Pointer to the TLS context

Returns

Error code

Definition at line 345 of file tls13_key_material.c.

tls13GenerateServerAppTrafficKeys()

error_t tls13GenerateServerAppTrafficKeys

(

TlsContext *

context

)

Compute server application traffic keys.

Parameters

[in]

context

Pointer to the TLS context

Returns

Error code

Definition at line 576 of file tls13_key_material.c.

tls13HkdfExpandLabel()

error_t tls13HkdfExpandLabel	(	TlsTransportProtocol	transportProtocol,
		const HashAlgo *	hash,
		const uint8_t *	secret,
		size_t	secretLen,
		const char_t *	label,
		const uint8_t *	context,
		size_t	contextLen,
		uint8_t *	output,
		size_t	outputLen
	)

HKDF-Expand-Label function.

Parameters

[in]	transportProtocol	Transport protocol (TLS or DTLS)
[in]	hash	Hash function used by HKDF
[in]	secret	Pointer to the secret
[in]	secretLen	Length of the secret
[in]	label	Identifying label (NULL-terminated string)
[in]	context	Pointer to the upper-layer context
[in]	contextLen	Length of the upper-layer context
[out]	output	Pointer to the output
[in]	outputLen	Desired output length

Returns

Error code

Definition at line 63 of file tls13_key_material.c.