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sslimpl.h
1717 lines (1455 loc) · 65.3 KB
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sslimpl.h
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is PRIVATE to SSL and should be the first thing included by
* any SSL implementation file.
*
* 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 __sslimpl_h_
#define __sslimpl_h_
#ifdef DEBUG
#undef NDEBUG
#else
#undef NDEBUG
#define NDEBUG
#endif
#include "secport.h"
#include "secerr.h"
#include "sslerr.h"
#include "sslexp.h"
#include "ssl3prot.h"
#include "hasht.h"
#include "nssilock.h"
#include "pkcs11t.h"
#if defined(XP_UNIX) || defined(XP_BEOS)
#include "unistd.h"
#endif
#include "nssrwlk.h"
#include "prthread.h"
#include "prclist.h"
#include "private/pprthred.h"
#include "sslt.h" /* for some formerly private types, now public */
typedef struct sslSocketStr sslSocket;
typedef struct sslNamedGroupDefStr sslNamedGroupDef;
#include "sslencode.h"
#include "sslexp.h"
#include "ssl3ext.h"
#include "sslspec.h"
#if defined(DEBUG) || defined(TRACE)
#ifdef __cplusplus
#define Debug 1
#else
extern int Debug;
#endif
#else
#undef Debug
#endif
#if defined(DEBUG) && !defined(TRACE) && !defined(NISCC_TEST)
#define TRACE
#endif
#ifdef TRACE
#define SSL_TRC(a, b) \
if (ssl_trace >= (a)) \
ssl_Trace b
#define PRINT_BUF(a, b) \
if (ssl_trace >= (a)) \
ssl_PrintBuf b
#define PRINT_KEY(a, b) \
if (ssl_trace >= (a)) \
ssl_PrintKey b
#else
#define SSL_TRC(a, b)
#define PRINT_BUF(a, b)
#define PRINT_KEY(a, b)
#endif
#ifdef DEBUG
#define SSL_DBG(b) \
if (ssl_debug) \
ssl_Trace b
#else
#define SSL_DBG(b)
#endif
#define LSB(x) ((unsigned char)((x)&0xff))
#define MSB(x) ((unsigned char)(((unsigned)(x)) >> 8))
#define CONST_CAST(T, X) ((T *)(X))
/************************************************************************/
typedef enum { SSLAppOpRead = 0,
SSLAppOpWrite,
SSLAppOpRDWR,
SSLAppOpPost,
SSLAppOpHeader
} SSLAppOperation;
#define SSL3_SESSIONID_BYTES 32
#define SSL_MIN_CHALLENGE_BYTES 16
#define SSL_MAX_CHALLENGE_BYTES 32
#define SSL3_MASTER_SECRET_LENGTH 48
/* number of wrap mechanisms potentially used to wrap master secrets. */
#define SSL_NUM_WRAP_MECHS 15
#define SSL_NUM_WRAP_KEYS 6
/* This makes the cert cache entry exactly 4k. */
#define SSL_MAX_CACHED_CERT_LEN 4060
#ifndef BPB
#define BPB 8 /* Bits Per Byte */
#endif
/* The default value from RFC 4347 is 1s, which is too slow. */
#define DTLS_RETRANSMIT_INITIAL_MS 50
/* The maximum time to wait between retransmissions. */
#define DTLS_RETRANSMIT_MAX_MS 10000
/* Time to wait in FINISHED state for retransmissions. */
#define DTLS_RETRANSMIT_FINISHED_MS 30000
/* default number of entries in namedGroupPreferences */
#define SSL_NAMED_GROUP_COUNT 31
/* Types and names of elliptic curves used in TLS */
typedef enum {
ec_type_explicitPrime = 1, /* not supported */
ec_type_explicitChar2Curve = 2, /* not supported */
ec_type_named = 3
} ECType;
typedef enum {
ticket_allow_early_data = 1,
ticket_allow_psk_ke = 2,
ticket_allow_psk_dhe_ke = 4,
ticket_allow_psk_auth = 8,
ticket_allow_psk_sign_auth = 16
} TLS13SessionTicketFlags;
struct sslNamedGroupDefStr {
/* The name is the value that is encoded on the wire in TLS. */
SSLNamedGroup name;
/* The number of bits in the group. */
unsigned int bits;
/* The key exchange algorithm this group provides. */
SSLKEAType keaType;
/* The OID that identifies the group to PKCS11. This also determines
* whether the group is enabled in policy. */
SECOidTag oidTag;
/* Assume that the group is always supported. */
PRBool assumeSupported;
};
typedef struct sslConnectInfoStr sslConnectInfo;
typedef struct sslGatherStr sslGather;
typedef struct sslSecurityInfoStr sslSecurityInfo;
typedef struct sslSessionIDStr sslSessionID;
typedef struct sslSocketOpsStr sslSocketOps;
typedef struct ssl3StateStr ssl3State;
typedef struct ssl3CertNodeStr ssl3CertNode;
typedef struct sslKeyPairStr sslKeyPair;
typedef struct ssl3DHParamsStr ssl3DHParams;
struct ssl3CertNodeStr {
struct ssl3CertNodeStr *next;
CERTCertificate *cert;
};
typedef SECStatus (*sslHandshakeFunc)(sslSocket *ss);
void ssl_CacheSessionID(sslSocket *ss);
void ssl_UncacheSessionID(sslSocket *ss);
void ssl_ServerCacheSessionID(sslSessionID *sid);
void ssl_ServerUncacheSessionID(sslSessionID *sid);
typedef sslSessionID *(*sslSessionIDLookupFunc)(const PRIPv6Addr *addr,
unsigned char *sid,
unsigned int sidLen,
CERTCertDBHandle *dbHandle);
/* Socket ops */
struct sslSocketOpsStr {
int (*connect)(sslSocket *, const PRNetAddr *);
PRFileDesc *(*accept)(sslSocket *, PRNetAddr *);
int (*bind)(sslSocket *, const PRNetAddr *);
int (*listen)(sslSocket *, int);
int (*shutdown)(sslSocket *, int);
int (*close)(sslSocket *);
int (*recv)(sslSocket *, unsigned char *, int, int);
/* points to the higher-layer send func, e.g. ssl_SecureSend. */
int (*send)(sslSocket *, const unsigned char *, int, int);
int (*read)(sslSocket *, unsigned char *, int);
int (*write)(sslSocket *, const unsigned char *, int);
int (*getpeername)(sslSocket *, PRNetAddr *);
int (*getsockname)(sslSocket *, PRNetAddr *);
};
/* Flags interpreted by ssl send functions. */
#define ssl_SEND_FLAG_FORCE_INTO_BUFFER 0x40000000
#define ssl_SEND_FLAG_NO_BUFFER 0x20000000
#define ssl_SEND_FLAG_NO_RETRANSMIT 0x08000000 /* DTLS only */
#define ssl_SEND_FLAG_MASK 0x7f000000
/*
** SSL3 cipher suite policy and preference struct.
*/
typedef struct {
#if !defined(_WIN32)
unsigned int cipher_suite : 16;
unsigned int policy : 8;
unsigned int enabled : 1;
unsigned int isPresent : 1;
#else
ssl3CipherSuite cipher_suite;
PRUint8 policy;
unsigned char enabled : 1;
unsigned char isPresent : 1;
#endif
} ssl3CipherSuiteCfg;
#define ssl_V3_SUITES_IMPLEMENTED 71
#define MAX_DTLS_SRTP_CIPHER_SUITES 4
/* MAX_SIGNATURE_SCHEMES allows for all the values we support. */
#define MAX_SIGNATURE_SCHEMES 15
typedef struct sslOptionsStr {
/* If SSL_SetNextProtoNego has been called, then this contains the
* list of supported protocols. */
SECItem nextProtoNego;
PRUint32 maxEarlyDataSize;
unsigned int useSecurity : 1;
unsigned int useSocks : 1;
unsigned int requestCertificate : 1;
unsigned int requireCertificate : 2;
unsigned int handshakeAsClient : 1;
unsigned int handshakeAsServer : 1;
unsigned int noCache : 1;
unsigned int fdx : 1;
unsigned int detectRollBack : 1;
unsigned int noLocks : 1;
unsigned int enableSessionTickets : 1;
unsigned int enableDeflate : 1; /* Deprecated. */
unsigned int enableRenegotiation : 2;
unsigned int requireSafeNegotiation : 1;
unsigned int enableFalseStart : 1;
unsigned int cbcRandomIV : 1;
unsigned int enableOCSPStapling : 1;
unsigned int enableNPN : 1;
unsigned int enableALPN : 1;
unsigned int reuseServerECDHEKey : 1;
unsigned int enableFallbackSCSV : 1;
unsigned int enableServerDhe : 1;
unsigned int enableExtendedMS : 1;
unsigned int enableSignedCertTimestamps : 1;
unsigned int requireDHENamedGroups : 1;
unsigned int enable0RttData : 1;
unsigned int enableTls13CompatMode : 1;
} sslOptions;
typedef enum { sslHandshakingUndetermined = 0,
sslHandshakingAsClient,
sslHandshakingAsServer
} sslHandshakingType;
#define SSL_LOCK_RANK_SPEC 255
/* These are the valid values for shutdownHow.
** These values are each 1 greater than the NSPR values, and the code
** depends on that relation to efficiently convert PR_SHUTDOWN values
** into ssl_SHUTDOWN values. These values use one bit for read, and
** another bit for write, and can be used as bitmasks.
*/
#define ssl_SHUTDOWN_NONE 0 /* NOT shutdown at all */
#define ssl_SHUTDOWN_RCV 1 /* PR_SHUTDOWN_RCV +1 */
#define ssl_SHUTDOWN_SEND 2 /* PR_SHUTDOWN_SEND +1 */
#define ssl_SHUTDOWN_BOTH 3 /* PR_SHUTDOWN_BOTH +1 */
/*
** A gather object. Used to read some data until a count has been
** satisfied. Primarily for support of async sockets.
** Everything in here is protected by the recvBufLock.
*/
struct sslGatherStr {
int state; /* see GS_ values below. */
/* "buf" holds received plaintext SSL records, after decrypt and MAC check.
* recv'd ciphertext records are put in inbuf (see below), then decrypted
* into buf.
*/
sslBuffer buf; /*recvBufLock*/
/* number of bytes previously read into hdr or inbuf.
** (offset - writeOffset) is the number of ciphertext bytes read in but
** not yet deciphered.
*/
unsigned int offset;
/* number of bytes to read in next call to ssl_DefRecv (recv) */
unsigned int remainder;
/* DoRecv uses the next two values to extract application data.
** The difference between writeOffset and readOffset is the amount of
** data available to the application. Note that the actual offset of
** the data in "buf" is recordOffset (above), not readOffset.
** In the current implementation, this is made available before the
** MAC is checked!!
*/
unsigned int readOffset; /* Spot where DATA reader (e.g. application
** or handshake code) will read next.
** Always zero for SSl3 application data.
*/
/* offset in buf/inbuf/hdr into which new data will be read from socket. */
unsigned int writeOffset;
/* Buffer for ssl3 to read (encrypted) data from the socket */
sslBuffer inbuf; /*recvBufLock*/
/* The ssl[23]_GatherData functions read data into this buffer, rather
** than into buf or inbuf, while in the GS_HEADER state.
** The portion of the SSL record header put here always comes off the wire
** as plaintext, never ciphertext.
** For SSL3/TLS, the plaintext portion is 5 bytes long. For DTLS it is 13.
*/
unsigned char hdr[13];
/* Buffer for DTLS data read off the wire as a single datagram */
sslBuffer dtlsPacket;
/* the start of the buffered DTLS record in dtlsPacket */
unsigned int dtlsPacketOffset;
/* tracks whether we've seen a v3-type record before and must reject
* any further v2-type records. */
PRBool rejectV2Records;
};
/* sslGather.state */
#define GS_INIT 0
#define GS_HEADER 1
#define GS_DATA 2
#define WRAPPED_MASTER_SECRET_SIZE 48
typedef struct {
PRUint8 wrapped_master_secret[WRAPPED_MASTER_SECRET_SIZE];
PRUint8 wrapped_master_secret_len;
PRUint8 resumable;
PRUint8 extendedMasterSecretUsed;
} ssl3SidKeys; /* 52 bytes */
typedef enum { never_cached,
in_client_cache,
in_server_cache,
invalid_cache, /* no longer in any cache. */
in_external_cache
} Cached;
#include "sslcert.h"
struct sslSessionIDStr {
/* The global cache lock must be held when accessing these members when the
* sid is in any cache.
*/
sslSessionID *next; /* chain used for client sockets, only */
Cached cached;
int references;
PRTime lastAccessTime;
/* The rest of the members, except for the members of u.ssl3.locked, may
* be modified only when the sid is not in any cache.
*/
CERTCertificate *peerCert;
SECItemArray peerCertStatus; /* client only */
const char *peerID; /* client only */
const char *urlSvrName; /* client only */
const sslNamedGroupDef *namedCurve; /* (server) for certificate lookup */
CERTCertificate *localCert;
PRIPv6Addr addr;
PRUint16 port;
SSL3ProtocolVersion version;
PRTime creationTime;
PRTime expirationTime;
SSLAuthType authType;
PRUint32 authKeyBits;
SSLKEAType keaType;
PRUint32 keaKeyBits;
SSLNamedGroup keaGroup;
SSLSignatureScheme sigScheme;
union {
struct {
/* values that are copied into the server's on-disk SID cache. */
PRUint8 sessionIDLength;
PRUint8 sessionID[SSL3_SESSIONID_BYTES];
ssl3CipherSuite cipherSuite;
PRUint8 policy;
ssl3SidKeys keys;
/* mechanism used to wrap master secret */
CK_MECHANISM_TYPE masterWrapMech;
/* The following values pertain to the slot that wrapped the
** master secret. (used only in client)
*/
SECMODModuleID masterModuleID;
/* what module wrapped the master secret */
CK_SLOT_ID masterSlotID;
PRUint16 masterWrapIndex;
/* what's the key index for the wrapping key */
PRUint16 masterWrapSeries;
/* keep track of the slot series, so we don't
* accidently try to use new keys after the
* card gets removed and replaced.*/
/* The following values pertain to the slot that did the signature
** for client auth. (used only in client)
*/
SECMODModuleID clAuthModuleID;
CK_SLOT_ID clAuthSlotID;
PRUint16 clAuthSeries;
char masterValid;
char clAuthValid;
SECItem srvName;
/* Signed certificate timestamps received in a TLS extension.
** (used only in client).
*/
SECItem signedCertTimestamps;
/* The NPN/ALPN value negotiated in the original connection.
* Used for TLS 1.3. */
SECItem alpnSelection;
/* This lock is lazily initialized by CacheSID when a sid is first
* cached. Before then, there is no need to lock anything because
* the sid isn't being shared by anything.
*/
PRRWLock *lock;
/* The lock must be held while reading or writing these members
* because they change while the sid is cached.
*/
struct {
/* The session ticket, if we have one, is sent as an extension
* in the ClientHello message. This field is used only by
* clients. It is protected by lock when lock is non-null
* (after the sid has been added to the client session cache).
*/
NewSessionTicket sessionTicket;
} locked;
} ssl3;
} u;
};
struct ssl3CipherSuiteDefStr {
ssl3CipherSuite cipher_suite;
SSL3BulkCipher bulk_cipher_alg;
SSL3MACAlgorithm mac_alg;
SSL3KeyExchangeAlgorithm key_exchange_alg;
SSLHashType prf_hash;
};
/*
** There are tables of these, all const.
*/
typedef struct {
/* An identifier for this struct. */
SSL3KeyExchangeAlgorithm kea;
/* The type of key exchange used by the cipher suite. */
SSLKEAType exchKeyType;
/* If the cipher suite uses a signature, the type of key used in the
* signature. */
KeyType signKeyType;
/* In most cases, cipher suites depend on their signature type for
* authentication, ECDH certificates being the exception. */
SSLAuthType authKeyType;
/* True if the key exchange for the suite is ephemeral. Or to be more
* precise: true if the ServerKeyExchange message is always required. */
PRBool ephemeral;
/* An OID describing the key exchange */
SECOidTag oid;
} ssl3KEADef;
typedef enum {
ssl_0rtt_none, /* 0-RTT not present */
ssl_0rtt_sent, /* 0-RTT sent (no decision yet) */
ssl_0rtt_accepted, /* 0-RTT sent and accepted */
ssl_0rtt_ignored, /* 0-RTT sent but rejected/ignored */
ssl_0rtt_done /* 0-RTT accepted, but finished */
} sslZeroRttState;
typedef enum {
ssl_0rtt_ignore_none, /* not ignoring */
ssl_0rtt_ignore_trial, /* ignoring with trial decryption */
ssl_0rtt_ignore_hrr /* ignoring until ClientHello (due to HRR) */
} sslZeroRttIgnore;
typedef enum {
idle_handshake,
wait_client_hello,
wait_end_of_early_data,
wait_client_cert,
wait_client_key,
wait_cert_verify,
wait_change_cipher,
wait_finished,
wait_server_hello,
wait_certificate_status,
wait_server_cert,
wait_server_key,
wait_cert_request,
wait_hello_done,
wait_new_session_ticket,
wait_encrypted_extensions,
wait_invalid /* Invalid value. There is no handshake message "invalid". */
} SSL3WaitState;
typedef enum {
client_hello_initial, /* The first attempt. */
client_hello_retry, /* If we receive HelloRetryRequest. */
client_hello_retransmit, /* In DTLS, if we receive HelloVerifyRequest. */
client_hello_renegotiation /* A renegotiation attempt. */
} sslClientHelloType;
typedef struct SessionTicketDataStr SessionTicketData;
typedef SECStatus (*sslRestartTarget)(sslSocket *);
/*
** A DTLS queued message (potentially to be retransmitted)
*/
typedef struct DTLSQueuedMessageStr {
PRCList link; /* The linked list link */
ssl3CipherSpec *cwSpec; /* The cipher spec to use, null for none */
SSL3ContentType type; /* The message type */
unsigned char *data; /* The data */
PRUint16 len; /* The data length */
} DTLSQueuedMessage;
typedef struct TLS13KeyShareEntryStr {
PRCList link; /* The linked list link */
const sslNamedGroupDef *group; /* The group for the entry */
SECItem key_exchange; /* The share itself */
} TLS13KeyShareEntry;
typedef struct TLS13EarlyDataStr {
PRCList link; /* The linked list link */
SECItem data; /* The data */
} TLS13EarlyData;
typedef enum {
handshake_hash_unknown = 0,
handshake_hash_combo = 1, /* The MD5/SHA-1 combination */
handshake_hash_single = 2, /* A single hash */
handshake_hash_record
} SSL3HandshakeHashType;
// A DTLS Timer.
typedef void (*DTLSTimerCb)(sslSocket *);
typedef struct {
const char *label;
DTLSTimerCb cb;
PRIntervalTime started;
PRUint32 timeout;
} dtlsTimer;
/*
** This is the "hs" member of the "ssl3" struct.
** This entire struct is protected by ssl3HandshakeLock
*/
typedef struct SSL3HandshakeStateStr {
SSL3Random server_random;
SSL3Random client_random;
SSL3WaitState ws; /* May also contain SSL3WaitState | 0x80 for TLS 1.3 */
/* This group of members is used for handshake running hashes. */
SSL3HandshakeHashType hashType;
sslBuffer messages; /* Accumulated handshake messages */
/* PKCS #11 mode:
* SSL 3.0 - TLS 1.1 use both |md5| and |sha|. |md5| is used for MD5 and
* |sha| for SHA-1.
* TLS 1.2 and later use only |sha|, for SHA-256. */
PK11Context *md5;
PK11Context *sha;
SSLSignatureScheme signatureScheme;
const ssl3KEADef *kea_def;
ssl3CipherSuite cipher_suite;
const ssl3CipherSuiteDef *suite_def;
sslBuffer msg_body; /* protected by recvBufLock */
/* partial handshake message from record layer */
unsigned int header_bytes;
/* number of bytes consumed from handshake */
/* message for message type and header length */
SSLHandshakeType msg_type;
unsigned long msg_len;
PRBool isResuming; /* we are resuming (not used in TLS 1.3) */
PRBool sendingSCSV; /* instead of empty RI */
sslBuffer msgState; /* current state for handshake messages*/
/* protected by recvBufLock */
/* The session ticket received in a NewSessionTicket message is temporarily
* stored in newSessionTicket until the handshake is finished; then it is
* moved to the sid.
*/
PRBool receivedNewSessionTicket;
NewSessionTicket newSessionTicket;
PRUint16 finishedBytes; /* size of single finished below */
union {
TLSFinished tFinished[2]; /* client, then server */
SSL3Finished sFinished[2];
PRUint8 data[72];
} finishedMsgs;
PRBool authCertificatePending;
/* Which function should SSL_RestartHandshake* call if we're blocked?
* One of NULL, ssl3_SendClientSecondRound, ssl3_FinishHandshake,
* or ssl3_AlwaysFail */
sslRestartTarget restartTarget;
/* Shared state between ssl3_HandleFinished and ssl3_FinishHandshake */
PRBool cacheSID;
PRBool canFalseStart; /* Can/did we False Start */
/* Which preliminaryinfo values have been set. */
PRUint32 preliminaryInfo;
/* Parsed extensions */
PRCList remoteExtensions; /* Parsed incoming extensions */
/* This group of values is used for DTLS */
PRUint16 sendMessageSeq; /* The sending message sequence
* number */
PRCList lastMessageFlight; /* The last message flight we
* sent */
PRUint16 maxMessageSent; /* The largest message we sent */
PRUint16 recvMessageSeq; /* The receiving message sequence
* number */
sslBuffer recvdFragments; /* The fragments we have received in
* a bitmask */
PRInt32 recvdHighWater; /* The high water mark for fragments
* received. -1 means no reassembly
* in progress. */
SECItem cookie; /* The Hello(Retry|Verify)Request cookie. */
dtlsTimer timers[3]; /* Holder for timers. */
dtlsTimer *rtTimer; /* Retransmit timer. */
dtlsTimer *ackTimer; /* Ack timer (DTLS 1.3 only). */
dtlsTimer *hdTimer; /* Read cipher holddown timer (DLTS 1.3 only) */
PRUint32 rtRetries; /* The retry counter */
SECItem srvVirtName; /* for server: name that was negotiated
* with a client. For client - is
* always set to NULL.*/
/* This group of values is used for TLS 1.3 and above */
PK11SymKey *currentSecret; /* The secret down the "left hand side"
* of the TLS 1.3 key schedule. */
PK11SymKey *resumptionMasterSecret; /* The resumption PSK. */
PK11SymKey *dheSecret; /* The (EC)DHE shared secret. */
PK11SymKey *pskBinderKey; /* Used to compute the PSK binder. */
PK11SymKey *clientEarlyTrafficSecret; /* The secret we use for 0-RTT. */
PK11SymKey *clientHsTrafficSecret; /* The source keys for handshake */
PK11SymKey *serverHsTrafficSecret; /* traffic keys. */
PK11SymKey *clientTrafficSecret; /* The source keys for application */
PK11SymKey *serverTrafficSecret; /* traffic keys */
PK11SymKey *earlyExporterSecret; /* for 0-RTT exporters */
PK11SymKey *exporterSecret; /* for exporters */
PRCList cipherSpecs; /* The cipher specs in the sequence they
* will be applied. */
sslZeroRttState zeroRttState; /* Are we doing a 0-RTT handshake? */
sslZeroRttIgnore zeroRttIgnore; /* Are we ignoring 0-RTT? */
ssl3CipherSuite zeroRttSuite; /* The cipher suite we used for 0-RTT. */
PRCList bufferedEarlyData; /* Buffered TLS 1.3 early data
* on server.*/
PRBool helloRetry; /* True if HelloRetryRequest has been sent
* or received. */
PRBool receivedCcs; /* A server received ChangeCipherSpec
* before the handshake started. */
PRBool clientCertRequested; /* True if CertificateRequest received. */
ssl3KEADef kea_def_mutable; /* Used to hold the writable kea_def
* we use for TLS 1.3 */
PRTime serverHelloTime; /* Time the ServerHello flight was sent. */
PRUint16 ticketNonce; /* A counter we use for tickets. */
SECItem fakeSid; /* ... (server) the SID the client used. */
PRBool endOfFlight; /* Processed a full flight (DTLS 1.3). */
/* The following lists contain DTLSHandshakeRecordEntry */
PRCList dtlsSentHandshake; /* Used to map records to handshake fragments. */
PRCList dtlsRcvdHandshake; /* Handshake records we have received
* used to generate ACKs. */
} SSL3HandshakeState;
#define SSL_ASSERT_HASHES_EMPTY(ss) \
do { \
PORT_Assert(ss->ssl3.hs.hashType == handshake_hash_unknown); \
PORT_Assert(ss->ssl3.hs.messages.len == 0); \
} while (0)
/*
** This is the "ssl3" struct, as in "ss->ssl3".
** note:
** usually, crSpec == cwSpec and prSpec == pwSpec.
** Sometimes, crSpec == pwSpec and prSpec == cwSpec.
** But there are never more than 2 actual specs.
** No spec must ever be modified if either "current" pointer points to it.
*/
struct ssl3StateStr {
/*
** The following Specs and Spec pointers must be protected using the
** Spec Lock.
*/
ssl3CipherSpec *crSpec; /* current read spec. */
ssl3CipherSpec *prSpec; /* pending read spec. */
ssl3CipherSpec *cwSpec; /* current write spec. */
ssl3CipherSpec *pwSpec; /* pending write spec. */
/* This is true after the peer requests a key update; false after a key
* update is initiated locally. */
PRBool peerRequestedKeyUpdate;
/* Internal callback for when we do a cipher suite change. Used for
* debugging in TLS 1.3. This can only be set by non-public functions. */
sslCipherSpecChangedFunc changedCipherSpecFunc;
void *changedCipherSpecArg;
CERTCertificate *clientCertificate; /* used by client */
SECKEYPrivateKey *clientPrivateKey; /* used by client */
CERTCertificateList *clientCertChain; /* used by client */
PRBool sendEmptyCert; /* used by client */
PRUint8 policy;
/* This says what cipher suites we can do, and should
* be either SSL_ALLOWED or SSL_RESTRICTED
*/
PLArenaPool *peerCertArena;
/* These are used to keep track of the peer CA */
void *peerCertChain;
/* chain while we are trying to validate it. */
CERTDistNames *ca_list;
/* used by server. trusted CAs for this socket. */
SSL3HandshakeState hs;
PRUint16 mtu; /* Our estimate of the MTU */
/* DTLS-SRTP cipher suite preferences (if any) */
PRUint16 dtlsSRTPCiphers[MAX_DTLS_SRTP_CIPHER_SUITES];
PRUint16 dtlsSRTPCipherCount;
PRBool fatalAlertSent;
PRBool dheWeakGroupEnabled; /* used by server */
const sslNamedGroupDef *dhePreferredGroup;
/* TLS 1.2 introduces separate signature algorithm negotiation.
* TLS 1.3 combined signature and hash into a single enum.
* This is our preference order. */
SSLSignatureScheme signatureSchemes[MAX_SIGNATURE_SCHEMES];
unsigned int signatureSchemeCount;
/* The version to check if we fell back from our highest version
* of TLS. Default is 0 in which case we check against the maximum
* configured version for this socket. Used only on the client. */
SSL3ProtocolVersion downgradeCheckVersion;
};
/* Ethernet MTU but without subtracting the headers,
* so slightly larger than expected */
#define DTLS_MAX_MTU 1500U
#define IS_DTLS(ss) (ss->protocolVariant == ssl_variant_datagram)
typedef struct {
SSL3ContentType type;
SSL3ProtocolVersion version;
sslSequenceNumber seq_num; /* DTLS only */
sslBuffer *buf;
} SSL3Ciphertext;
struct sslKeyPairStr {
SECKEYPrivateKey *privKey;
SECKEYPublicKey *pubKey;
PRInt32 refCount; /* use PR_Atomic calls for this. */
};
typedef struct {
PRCList link;
const sslNamedGroupDef *group;
sslKeyPair *keys;
} sslEphemeralKeyPair;
struct ssl3DHParamsStr {
SSLNamedGroup name;
SECItem prime; /* p */
SECItem base; /* g */
};
typedef struct SSLWrappedSymWrappingKeyStr {
PRUint8 wrappedSymmetricWrappingkey[512];
CK_MECHANISM_TYPE symWrapMechanism;
/* unwrapped symmetric wrapping key uses this mechanism */
CK_MECHANISM_TYPE asymWrapMechanism;
/* mechanism used to wrap the SymmetricWrappingKey using
* server's public and/or private keys. */
PRInt16 wrapMechIndex;
PRUint16 wrapKeyIndex;
PRUint16 wrappedSymKeyLen;
} SSLWrappedSymWrappingKey;
typedef struct SessionTicketStr {
PRBool valid;
SSL3ProtocolVersion ssl_version;
ssl3CipherSuite cipher_suite;
SSLAuthType authType;
PRUint32 authKeyBits;
SSLKEAType keaType;
PRUint32 keaKeyBits;
SSLNamedGroup originalKeaGroup;
SSLSignatureScheme signatureScheme;
const sslNamedGroupDef *namedCurve; /* For certificate lookup. */
/*
* msWrapMech contains a meaningful value only if ms_is_wrapped is true.
*/
PRUint8 ms_is_wrapped;
CK_MECHANISM_TYPE msWrapMech;
PRUint16 ms_length;
PRUint8 master_secret[48];
PRBool extendedMasterSecretUsed;
ClientAuthenticationType client_auth_type;
SECItem peer_cert;
PRTime timestamp;
PRUint32 flags;
SECItem srvName; /* negotiated server name */
SECItem alpnSelection;
PRUint32 maxEarlyData;
PRUint32 ticketAgeBaseline;
SECItem applicationToken;
} SessionTicket;
/*
* SSL2 buffers used in SSL3.
* writeBuf in the SecurityInfo maintained by sslsecur.c is used
* to hold the data just about to be passed to the kernel
* sendBuf in the ConnectInfo maintained by sslcon.c is used
* to hold handshake messages as they are accumulated
*/
/*
** This is "ci", as in "ss->sec.ci".
**
** Protection: All the variables in here are protected by
** firstHandshakeLock AND ssl3HandshakeLock
*/
struct sslConnectInfoStr {
/* outgoing handshakes appended to this. */
sslBuffer sendBuf; /*xmitBufLock*/
PRIPv6Addr peer;
unsigned short port;
sslSessionID *sid;
};
/* Note: The entire content of this struct and whatever it points to gets
* blown away by SSL_ResetHandshake(). This is "sec" as in "ss->sec".
*
* Unless otherwise specified below, the contents of this struct are
* protected by firstHandshakeLock AND ssl3HandshakeLock.
*/
struct sslSecurityInfoStr {
#define SSL_ROLE(ss) (ss->sec.isServer ? "server" : "client")
PRBool isServer;
sslBuffer writeBuf; /*xmitBufLock*/
CERTCertificate *localCert;
CERTCertificate *peerCert;
SECKEYPublicKey *peerKey;
SSLAuthType authType;
PRUint32 authKeyBits;
SSLSignatureScheme signatureScheme;
SSLKEAType keaType;
PRUint32 keaKeyBits;
const sslNamedGroupDef *keaGroup;
const sslNamedGroupDef *originalKeaGroup;
/* The selected certificate (for servers only). */
const sslServerCert *serverCert;
/* These are used during a connection handshake */
sslConnectInfo ci;
};
/*
** SSL Socket struct
**
** Protection: XXX
*/
struct sslSocketStr {
PRFileDesc *fd;
/* Pointer to operations vector for this socket */
const sslSocketOps *ops;
/* SSL socket options */
sslOptions opt;
/* Enabled version range */
SSLVersionRange vrange;
/* State flags */
unsigned long clientAuthRequested;
unsigned long delayDisabled; /* Nagle delay disabled */
unsigned long firstHsDone; /* first handshake is complete. */
unsigned long enoughFirstHsDone; /* enough of the first handshake is
* done for callbacks to be able to
* retrieve channel security
* parameters from the SSL socket. */
unsigned long handshakeBegun;
unsigned long lastWriteBlocked;
unsigned long recvdCloseNotify; /* received SSL EOF. */
unsigned long TCPconnected;
unsigned long appDataBuffered;
unsigned long peerRequestedProtection; /* from old renegotiation */
/* version of the protocol to use */
SSL3ProtocolVersion version;
SSL3ProtocolVersion clientHelloVersion; /* version sent in client hello. */
sslSecurityInfo sec; /* not a pointer any more */
/* protected by firstHandshakeLock AND ssl3HandshakeLock. */
const char *url;
sslHandshakeFunc handshake; /*firstHandshakeLock*/
/* the following variable is only used with socks or other proxies. */
char *peerID; /* String uniquely identifies target server. */
/* ECDHE and DHE keys: In TLS 1.3, we might have to maintain multiple of
* these on the client side. The server inserts a single value into this
* list for all versions. */
PRCList /*<sslEphemeralKeyPair>*/ ephemeralKeyPairs;
/* Callbacks */
SSLAuthCertificate authCertificate;
void *authCertificateArg;
SSLGetClientAuthData getClientAuthData;
void *getClientAuthDataArg;
SSLSNISocketConfig sniSocketConfig;
void *sniSocketConfigArg;
SSLAlertCallback alertReceivedCallback;
void *alertReceivedCallbackArg;
SSLAlertCallback alertSentCallback;
void *alertSentCallbackArg;
SSLBadCertHandler handleBadCert;
void *badCertArg;
SSLHandshakeCallback handshakeCallback;
void *handshakeCallbackData;
SSLCanFalseStartCallback canFalseStartCallback;
void *canFalseStartCallbackData;
void *pkcs11PinArg;
SSLNextProtoCallback nextProtoCallback;
void *nextProtoArg;
SSLHelloRetryRequestCallback hrrCallback;
void *hrrCallbackArg;
PRCList extensionHooks;
SSLResumptionTokenCallback resumptionTokenCallback;
void *resumptionTokenContext;
PRIntervalTime rTimeout; /* timeout for NSPR I/O */
PRIntervalTime wTimeout; /* timeout for NSPR I/O */
PRIntervalTime cTimeout; /* timeout for NSPR I/O */
PZLock *recvLock; /* lock against multiple reader threads. */
PZLock *sendLock; /* lock against multiple sender threads. */
PZMonitor *recvBufLock; /* locks low level recv buffers. */
PZMonitor *xmitBufLock; /* locks low level xmit buffers. */
/* Only one thread may operate on the socket until the initial handshake
** is complete. This Monitor ensures that. Since SSL2 handshake is
** only done once, this is also effectively the SSL2 handshake lock.
*/
PZMonitor *firstHandshakeLock;
/* This monitor protects the ssl3 handshake state machine data.
** Only one thread (reader or writer) may be in the ssl3 handshake state
** machine at any time. */
PZMonitor *ssl3HandshakeLock;