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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 __ssl3ext_h_
#define __ssl3ext_h_
typedef enum {
sni_nametype_hostname
} SNINameType;
typedef struct TLSExtensionDataStr TLSExtensionData;
/* registerable callback function that either appends extension to buffer
* or returns length of data that it would have appended.
*/
typedef PRInt32 (*ssl3HelloExtensionSenderFunc)(const sslSocket *ss,
TLSExtensionData *xtnData,
PRBool append,
PRUint32 maxBytes);
/* registerable callback function that handles a received extension,
* of the given type.
*/
typedef SECStatus (*ssl3ExtensionHandlerFunc)(const sslSocket *ss,
TLSExtensionData *xtnData,
PRUint16 ex_type,
SECItem *data);
/* row in a table of hello extension senders */
typedef struct {
PRInt32 ex_type;
ssl3HelloExtensionSenderFunc ex_sender;
} ssl3HelloExtensionSender;
/* row in a table of hello extension handlers */
typedef struct {
PRInt32 ex_type;
ssl3ExtensionHandlerFunc ex_handler;
} ssl3ExtensionHandler;
struct TLSExtensionDataStr {
/* registered callbacks that send server hello extensions */
ssl3HelloExtensionSender serverHelloSenders[SSL_MAX_EXTENSIONS];
ssl3HelloExtensionSender encryptedExtensionsSenders[SSL_MAX_EXTENSIONS];
ssl3HelloExtensionSender certificateSenders[SSL_MAX_EXTENSIONS];
/* Keep track of the extensions that are negotiated. */
PRUint16 numAdvertised;
PRUint16 numNegotiated;
PRUint16 advertised[SSL_MAX_EXTENSIONS];
PRUint16 negotiated[SSL_MAX_EXTENSIONS];
/* SessionTicket Extension related data. */
PRBool ticketTimestampVerified;
PRBool emptySessionTicket;
PRBool sentSessionTicketInClientHello;
SECItem psk_ke_modes;
PRUint32 max_early_data_size;
/* SNI Extension related data
* Names data is not coppied from the input buffer. It can not be
* used outside the scope where input buffer is defined and that
* is beyond ssl3_HandleClientHello function. */
SECItem *sniNameArr;
PRUint32 sniNameArrSize;
/* Signed Certificate Timestamps extracted from the TLS extension.
* (client only).
* This container holds a temporary pointer to the extension data,
* until a session structure (the sec.ci.sid of an sslSocket) is setup
* that can hold a permanent copy of the data
* (in sec.ci.sid.u.ssl3.signedCertTimestamps).
* The data pointed to by this structure is neither explicitly allocated
* nor copied: the pointer points to the handshake message buffer and is
* only valid in the scope of ssl3_HandleServerHello.
*/
SECItem signedCertTimestamps;
PRBool peerSupportsFfdheGroups; /* if the peer supports named ffdhe groups */
/* clientSigAndHash contains the contents of the signature_algorithms
* extension (if any) from the client. This is only valid for TLS 1.2
* or later. */
SSLSignatureScheme *clientSigSchemes;
unsigned int numClientSigScheme;
/* In a client: if the server supports Next Protocol Negotiation, then
* this is the protocol that was negotiated.
*/
SECItem nextProto;
SSLNextProtoState nextProtoState;
PRUint16 dtlsSRTPCipherSuite; /* 0 if not selected */
SECItem pskBinder; /* The PSK binder for the first PSK (TLS 1.3) */
unsigned long pskBinderPrefixLen; /* The length of the binder input. */
PRCList remoteKeyShares; /* The other side's public keys (TLS 1.3) */
};
typedef struct TLSExtensionStr {
PRCList link; /* The linked list link */
PRUint16 type; /* Extension type */
SECItem data; /* Pointers into the handshake data. */
} TLSExtension;
SECStatus ssl3_HandleExtensions(sslSocket *ss,
SSL3Opaque **b, PRUint32 *length,
SSL3HandshakeType handshakeMessage);
SECStatus ssl3_ParseExtensions(sslSocket *ss,
SSL3Opaque **b, PRUint32 *length);
SECStatus ssl3_HandleParsedExtensions(sslSocket *ss,
SSL3HandshakeType handshakeMessage);
TLSExtension *ssl3_FindExtension(sslSocket *ss,
SSLExtensionType extension_type);
void ssl3_DestroyRemoteExtensions(PRCList *list);
void ssl3_InitExtensionData(TLSExtensionData *xtnData);
void ssl3_ResetExtensionData(TLSExtensionData *xtnData);
PRBool ssl3_ExtensionNegotiated(const sslSocket *ss, PRUint16 ex_type);
PRBool ssl3_ClientExtensionAdvertised(const sslSocket *ss, PRUint16 ex_type);
SECStatus ssl3_RegisterExtensionSender(const sslSocket *ss,
TLSExtensionData *xtnData,
PRUint16 ex_type,
ssl3HelloExtensionSenderFunc cb);
PRInt32 ssl3_CallHelloExtensionSenders(sslSocket *ss, PRBool append, PRUint32 maxBytes,
const ssl3HelloExtensionSender *sender);
unsigned int ssl3_CalculatePaddingExtensionLength(unsigned int clientHelloLength);
PRInt32 ssl3_AppendPaddingExtension(sslSocket *ss, unsigned int extensionLen,
PRUint32 maxBytes);
/* Thunks to let us operate on const sslSocket* objects. */
SECStatus ssl3_ExtAppendHandshake(const sslSocket *ss, const void *void_src,
PRInt32 bytes);
SECStatus ssl3_ExtAppendHandshakeNumber(const sslSocket *ss, PRInt32 num,
PRInt32 lenSize);
SECStatus ssl3_ExtAppendHandshakeVariable(const sslSocket *ss,
const SSL3Opaque *src, PRInt32 bytes,
PRInt32 lenSize);
void ssl3_ExtSendAlert(const sslSocket *ss, SSL3AlertLevel level,
SSL3AlertDescription desc);
void ssl3_ExtDecodeError(const sslSocket *ss);
SECStatus ssl3_ExtConsumeHandshake(const sslSocket *ss, void *v, PRInt32 bytes,
SSL3Opaque **b, PRUint32 *length);
PRInt32 ssl3_ExtConsumeHandshakeNumber(const sslSocket *ss, PRInt32 bytes,
SSL3Opaque **b, PRUint32 *length);
SECStatus ssl3_ExtConsumeHandshakeVariable(const sslSocket *ss, SECItem *i,
PRInt32 bytes, SSL3Opaque **b,
PRUint32 *length);
#endif
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