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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is PRIVATE to SSL.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __tls13psk_h_
#define __tls13psk_h_
/*
* Internally, we have track sslPsk pointers in three locations:
* 1) An external PSK can be configured to the socket, in which case ss->psk will hold an owned reference.
* For now, this only holds one external PSK. The value will persist across handshake restarts.
* 2) When a handshake begins, the ss->psk value is deep-copied into ss->ssl3.hs.psks, which may also hold
* a resumption PSK. This is essentially a priority-sorted list (where a resumption PSK has higher
* priority than external), and we currently only send one PskIdentity and binder.
* 3) During negotiation, ss->xtnData.selectedPsk will either be NULL or it will hold a non-owning refernce
* to the PSK that has been (or is being) negotiated.
*/
/* Note: When holding a resumption PSK:
* 1. |hash| comes from the original connection.
* 2. |label| is ignored: The identity sent in the pre_shared_key_xtn
* comes from ss->sec.ci.sid->u.ssl3.locked.sessionTicket.
*/
struct sslPskStr {
PRCList link;
PK11SymKey *key; /* A raw PSK. */
PK11SymKey *binderKey; /* The binder key derived from |key|. |key| is NULL after derivation. */
SSLPskType type; /* none, resumption, or external. */
SECItem label; /* Label (identity) for an external PSK. */
SSLHashType hash; /* A hash algorithm associated with a PSK. */
ssl3CipherSuite zeroRttSuite; /* For EPSKs, an explicitly-configured ciphersuite for 0-Rtt. */
PRUint32 maxEarlyData; /* For EPSKs, a limit on early data. Must be > 0 for 0-Rtt. */
};
SECStatus SSLExp_AddExternalPsk(PRFileDesc *fd, PK11SymKey *psk, const PRUint8 *identity,
unsigned int identitylen, SSLHashType hash);
SECStatus SSLExp_AddExternalPsk0Rtt(PRFileDesc *fd, PK11SymKey *psk, const PRUint8 *identity,
unsigned int identitylen, SSLHashType hash,
PRUint16 zeroRttSuite, PRUint32 maxEarlyData);
SECStatus SSLExp_RemoveExternalPsk(PRFileDesc *fd, const PRUint8 *identity, unsigned int identitylen);
sslPsk *tls13_CopyPsk(sslPsk *opsk);
void tls13_DestroyPsk(sslPsk *psk);
void tls13_DestroyPskList(PRCList *list);
sslPsk *tls13_MakePsk(PK11SymKey *key, SSLPskType pskType, SSLHashType hashType, const SECItem *label);
SECStatus tls13_ResetHandshakePsks(sslSocket *ss, PRCList *list);
#endif