/* -*- 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 __tls13con_h_
#define __tls13con_h_

#include "sslexp.h"
#include "sslspec.h"

typedef enum {
    tls13_extension_allowed,
    tls13_extension_disallowed,
    tls13_extension_unknown
} tls13ExtensionStatus;

#define TLS13_MAX_FINISHED_SIZE 64
#define TLS13_COOKIE_SENTINEL 0xff

SECStatus tls13_UnprotectRecord(
    sslSocket *ss, ssl3CipherSpec *spec,
    SSL3Ciphertext *cText, sslBuffer *plaintext,
    SSLContentType *innerType,
    SSL3AlertDescription *alert);

#if defined(WIN32)
#define __func__ __FUNCTION__
#endif

void tls13_SetHsState(sslSocket *ss, SSL3WaitState ws,
                      const char *func, const char *file, int line);
#define TLS13_SET_HS_STATE(ss, ws) \
    tls13_SetHsState(ss, ws, __func__, __FILE__, __LINE__)

/* Return PR_TRUE if the socket is in one of the given states, else return
 * PR_FALSE. Only call the macro not the function, because the trailing
 * wait_invalid is needed to terminate the argument list. */
PRBool tls13_InHsState(sslSocket *ss, ...);
#define TLS13_IN_HS_STATE(ss, ...) \
    tls13_InHsState(ss, __VA_ARGS__, wait_invalid)

PRBool tls13_IsPostHandshake(const sslSocket *ss);

SSLHashType tls13_GetHash(const sslSocket *ss);
SECStatus tls13_GetHashAndCipher(PRUint16 version, PRUint16 cipherSuite,
                                 SSLHashType *hash, const ssl3BulkCipherDef **cipher);
SSLHashType tls13_GetHashForCipherSuite(ssl3CipherSuite suite);
unsigned int tls13_GetHashSize(const sslSocket *ss);
unsigned int tls13_GetHashSizeForHash(SSLHashType hash);
SECStatus tls13_ComputeHash(sslSocket *ss, SSL3Hashes *hashes,
                            const PRUint8 *buf, unsigned int len,
                            SSLHashType hash);
SECStatus tls13_ComputeHandshakeHashes(sslSocket *ss,
                                       SSL3Hashes *hashes);
SECStatus tls13_DeriveSecretNullHash(sslSocket *ss, PK11SymKey *key,
                                     const char *label,
                                     unsigned int labelLen,
                                     PK11SymKey **dest,
                                     SSLHashType hash);
void tls13_FatalError(sslSocket *ss, PRErrorCode prError,
                      SSL3AlertDescription desc);
SECStatus tls13_SetupClientHello(sslSocket *ss, sslClientHelloType chType);
SECStatus tls13_MaybeDo0RTTHandshake(sslSocket *ss);
PRInt32 tls13_LimitEarlyData(sslSocket *ss, SSLContentType type, PRInt32 toSend);
PRBool tls13_AllowPskCipher(const sslSocket *ss,
                            const ssl3CipherSuiteDef *cipher_def);
PRBool tls13_PskSuiteEnabled(sslSocket *ss);
SECStatus tls13_WriteExtensionsWithBinder(sslSocket *ss, sslBuffer *extensions,
                                          sslBuffer *chBuf);
SECStatus tls13_HandleClientHelloPart2(sslSocket *ss,
                                       const SECItem *suites,
                                       sslSessionID *sid,
                                       const PRUint8 *msg,
                                       unsigned int len);
SECStatus tls13_HandleServerHelloPart2(sslSocket *ss, const PRUint8 *savedMsg, PRUint32 savedLength);
SECStatus tls13_HandlePostHelloHandshakeMessage(sslSocket *ss, PRUint8 *b,
                                                PRUint32 length);
SECStatus tls13_ConstructHelloRetryRequest(sslSocket *ss,
                                           ssl3CipherSuite cipherSuite,
                                           const sslNamedGroupDef *selectedGroup,
                                           PRUint8 *cookie,
                                           unsigned int cookieLen,
                                           sslBuffer *buffer);
SECStatus tls13_HandleHelloRetryRequest(sslSocket *ss, const PRUint8 *b,
                                        PRUint32 length);
SECStatus tls13_HandleKeyShare(sslSocket *ss,
                               TLS13KeyShareEntry *entry,
                               sslKeyPair *keyPair,
                               SSLHashType hash,
                               PK11SymKey **out);
TLS13KeyShareEntry *tls13_CopyKeyShareEntry(TLS13KeyShareEntry *o);
void tls13_DestroyKeyShareEntry(TLS13KeyShareEntry *entry);
void tls13_DestroyKeyShares(PRCList *list);
SECStatus tls13_CreateKeyShare(sslSocket *ss, const sslNamedGroupDef *groupDef,
                               sslEphemeralKeyPair **keyPair);
SECStatus tls13_AddKeyShare(sslSocket *ss, const sslNamedGroupDef *groupDef);
void tls13_DestroyEarlyData(PRCList *list);
SECStatus tls13_SetAlertCipherSpec(sslSocket *ss);
tls13ExtensionStatus tls13_ExtensionStatus(PRUint16 extension,
                                           SSLHandshakeType message);
SECStatus tls13_ProtectRecord(sslSocket *ss,
                              ssl3CipherSpec *cwSpec,
                              SSLContentType type,
                              const PRUint8 *pIn,
                              PRUint32 contentLen,
                              sslBuffer *wrBuf);
PRInt32 tls13_Read0RttData(sslSocket *ss, PRUint8 *buf, PRInt32 len);
SECStatus tls13_HandleEarlyApplicationData(sslSocket *ss, sslBuffer *origBuf);
PRBool tls13_ClientAllow0Rtt(const sslSocket *ss, const sslSessionID *sid);
PRUint16 tls13_EncodeVersion(SSL3ProtocolVersion version,
                             SSLProtocolVariant variant);
SECStatus tls13_ClientReadSupportedVersion(sslSocket *ss);
SECStatus tls13_NegotiateVersion(sslSocket *ss,
                                 const TLSExtension *supported_versions);
PRBool tls13_ShouldRequestClientAuth(sslSocket *ss);

PRBool tls13_IsReplay(const sslSocket *ss, const sslSessionID *sid);
void tls13_AntiReplayRollover(SSLAntiReplayContext *ctx, PRTime now);
SSLAntiReplayContext *tls13_RefAntiReplayContext(SSLAntiReplayContext *ctx);
void tls13_ReleaseAntiReplayContext(SSLAntiReplayContext *ctx);

SECStatus SSLExp_CreateAntiReplayContext(
    PRTime now, PRTime window, unsigned int k, unsigned int bits,
    SSLAntiReplayContext **ctx);
SECStatus SSLExp_SetAntiReplayContext(PRFileDesc *fd,
                                      SSLAntiReplayContext *ctx);
SECStatus SSLExp_ReleaseAntiReplayContext(SSLAntiReplayContext *ctx);

SECStatus SSLExp_HelloRetryRequestCallback(PRFileDesc *fd,
                                           SSLHelloRetryRequestCallback cb,
                                           void *arg);
SECStatus tls13_SendKeyUpdate(sslSocket *ss, tls13KeyUpdateRequest request,
                              PRBool buffer);
SECStatus SSLExp_KeyUpdate(PRFileDesc *fd, PRBool requestUpdate);
PRBool tls13_MaybeTls13(sslSocket *ss);
unsigned int tls13_SetupAeadIv(PRBool isDTLS, unsigned char *ivOut,
                               unsigned char *ivIn, unsigned int offset,
                               unsigned int ivLen, DTLSEpoch epoch);
SECStatus tls13_AEAD(PK11Context *context, PRBool decrypt,
                     CK_GENERATOR_FUNCTION ivGen, unsigned int fixedbits,
                     const unsigned char *ivIn, unsigned char *ivOut,
                     unsigned int ivLen,
                     const unsigned char *nonceIn, unsigned int nonceLen,
                     const unsigned char *aad, unsigned int aadLen,
                     unsigned char *out, unsigned int *outLen,
                     unsigned int maxout, unsigned int tagLen,
                     const unsigned char *in, unsigned int inLen);
void tls13_SetSpecRecordVersion(sslSocket *ss, ssl3CipherSpec *spec);
SECStatus SSLExp_SendCertificateRequest(PRFileDesc *fd);

/* Use this instead of FATAL_ERROR when no alert shall be sent. */
#define LOG_ERROR(ss, prError)                                                     \
    do {                                                                           \
        SSL_TRC(3, ("%d: TLS13[%d]: fatal error %d in %s (%s:%d)",                 \
                    SSL_GETPID(), ss->fd, prError, __func__, __FILE__, __LINE__)); \
        PORT_SetError(prError);                                                    \
    } while (0)

/* Log an error and generate an alert because something is irreparably wrong. */
#define FATAL_ERROR(ss, prError, desc)       \
    do {                                     \
        LOG_ERROR(ss, prError);              \
        tls13_FatalError(ss, prError, desc); \
    } while (0)

#endif /* __tls13con_h_ */