/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * 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/. */ #include "nssrenam.h" #include "nss.h" #include "ssl.h" #include "sslproto.h" #include "sslimpl.h" #include "pk11pub.h" #include "ssl3ext.h" #include "ssl3exthandle.h" #include "tls13exthandle.h" SECStatus tls13_ServerSendStatusRequestXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { const sslServerCert *serverCert = ss->sec.serverCert; const SECItem *item; SECStatus rv; if (!serverCert->certStatusArray || !serverCert->certStatusArray->len) { return SECSuccess; } item = &serverCert->certStatusArray->items[0]; /* Only send the first entry. */ /* status_type == ocsp */ rv = sslBuffer_AppendNumber(buf, 1 /*ocsp*/, 1); if (rv != SECSuccess) { return SECFailure; } /* opaque OCSPResponse<1..2^24-1> */ rv = sslBuffer_AppendVariable(buf, item->data, item->len, 3); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } /* * [draft-ietf-tls-tls13-11] Section 6.3.2.3. * * struct { * NamedGroup group; * opaque key_exchange<1..2^16-1>; * } KeyShareEntry; * * struct { * select (role) { * case client: * KeyShareEntry client_shares<4..2^16-1>; * * case server: * KeyShareEntry server_share; * } * } KeyShare; * * DH is Section 6.3.2.3.1. * * opaque dh_Y<1..2^16-1>; * * ECDH is Section 6.3.2.3.2. * * opaque point <1..2^8-1>; */ static PRUint32 tls13_SizeOfKeyShareEntry(const SECKEYPublicKey *pubKey) { /* Size = NamedGroup(2) + length(2) + opaque share */ switch (pubKey->keyType) { case ecKey: return 2 + 2 + pubKey->u.ec.publicValue.len; case dhKey: return 2 + 2 + pubKey->u.dh.prime.len; default: PORT_Assert(0); } return 0; } static SECStatus tls13_EncodeKeyShareEntry(sslBuffer *buf, const sslEphemeralKeyPair *keyPair) { SECStatus rv; SECKEYPublicKey *pubKey = keyPair->keys->pubKey; unsigned int size = tls13_SizeOfKeyShareEntry(pubKey); rv = sslBuffer_AppendNumber(buf, keyPair->group->name, 2); if (rv != SECSuccess) return rv; rv = sslBuffer_AppendNumber(buf, size - 4, 2); if (rv != SECSuccess) return rv; switch (pubKey->keyType) { case ecKey: rv = sslBuffer_Append(buf, pubKey->u.ec.publicValue.data, pubKey->u.ec.publicValue.len); break; case dhKey: rv = ssl_AppendPaddedDHKeyShare(buf, pubKey, PR_FALSE); break; default: PORT_Assert(0); PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); break; } return rv; } SECStatus tls13_ClientSendKeyShareXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { SECStatus rv; PRCList *cursor; unsigned int lengthOffset; if (ss->vrange.max < SSL_LIBRARY_VERSION_TLS_1_3) { return SECSuccess; } /* Optimistically try to send an ECDHE key using the * preexisting key (in future will be keys) */ SSL_TRC(3, ("%d: TLS13[%d]: send client key share xtn", SSL_GETPID(), ss->fd)); /* Save the offset to the length. */ rv = sslBuffer_Skip(buf, 2, &lengthOffset); if (rv != SECSuccess) { return SECFailure; } for (cursor = PR_NEXT_LINK(&ss->ephemeralKeyPairs); cursor != &ss->ephemeralKeyPairs; cursor = PR_NEXT_LINK(cursor)) { sslEphemeralKeyPair *keyPair = (sslEphemeralKeyPair *)cursor; rv = tls13_EncodeKeyShareEntry(buf, keyPair); if (rv != SECSuccess) { return SECFailure; } } rv = sslBuffer_InsertLength(buf, lengthOffset, 2); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } static SECStatus tls13_HandleKeyShareEntry(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; PRUint32 group; const sslNamedGroupDef *groupDef; TLS13KeyShareEntry *ks = NULL; SECItem share = { siBuffer, NULL, 0 }; rv = ssl3_ExtConsumeHandshakeNumber(ss, &group, 2, &data->data, &data->len); if (rv != SECSuccess) { PORT_SetError(SSL_ERROR_RX_MALFORMED_KEY_SHARE); goto loser; } groupDef = ssl_LookupNamedGroup(group); rv = ssl3_ExtConsumeHandshakeVariable(ss, &share, 2, &data->data, &data->len); if (rv != SECSuccess) { goto loser; } /* If the group is disabled, continue. */ if (!groupDef) { return SECSuccess; } ks = PORT_ZNew(TLS13KeyShareEntry); if (!ks) goto loser; ks->group = groupDef; rv = SECITEM_CopyItem(NULL, &ks->key_exchange, &share); if (rv != SECSuccess) goto loser; PR_APPEND_LINK(&ks->link, &xtnData->remoteKeyShares); return SECSuccess; loser: if (ks) tls13_DestroyKeyShareEntry(ks); return SECFailure; } /* Handle an incoming KeyShare extension at the client and copy to * |xtnData->remoteKeyShares| for future use. The key * share is processed in tls13_HandleServerKeyShare(). */ SECStatus tls13_ClientHandleKeyShareXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; PORT_Assert(PR_CLIST_IS_EMPTY(&xtnData->remoteKeyShares)); PORT_Assert(!ss->sec.isServer); /* The server must not send this extension when negotiating < TLS 1.3. */ if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { PORT_SetError(SSL_ERROR_EXTENSION_DISALLOWED_FOR_VERSION); return SECFailure; } SSL_TRC(3, ("%d: SSL3[%d]: handle key_share extension", SSL_GETPID(), ss->fd)); rv = tls13_HandleKeyShareEntry(ss, xtnData, data); if (rv != SECSuccess) { PORT_SetError(SSL_ERROR_RX_MALFORMED_KEY_SHARE); return SECFailure; } if (data->len) { PORT_SetError(SSL_ERROR_RX_MALFORMED_KEY_SHARE); return SECFailure; } return SECSuccess; } SECStatus tls13_ClientHandleKeyShareXtnHrr(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; PRUint32 tmp; const sslNamedGroupDef *group; PORT_Assert(!ss->sec.isServer); PORT_Assert(ss->vrange.max >= SSL_LIBRARY_VERSION_TLS_1_3); SSL_TRC(3, ("%d: SSL3[%d]: handle key_share extension in HRR", SSL_GETPID(), ss->fd)); rv = ssl3_ExtConsumeHandshakeNumber(ss, &tmp, 2, &data->data, &data->len); if (rv != SECSuccess) { return SECFailure; /* error code already set */ } if (data->len) { ssl3_ExtSendAlert(ss, alert_fatal, decode_error); PORT_SetError(SSL_ERROR_RX_MALFORMED_HELLO_RETRY_REQUEST); return SECFailure; } group = ssl_LookupNamedGroup((SSLNamedGroup)tmp); /* If the group is not enabled, or we already have a share for the * requested group, abort. */ if (!ssl_NamedGroupEnabled(ss, group) || ssl_HaveEphemeralKeyPair(ss, group)) { ssl3_ExtSendAlert(ss, alert_fatal, illegal_parameter); PORT_SetError(SSL_ERROR_RX_MALFORMED_HELLO_RETRY_REQUEST); return SECFailure; } /* Now delete all the key shares per [draft-ietf-tls-tls13 S 4.1.2] */ ssl_FreeEphemeralKeyPairs(CONST_CAST(sslSocket, ss)); /* And replace with our new share. */ rv = tls13_CreateKeyShare(CONST_CAST(sslSocket, ss), group); if (rv != SECSuccess) { ssl3_ExtSendAlert(ss, alert_fatal, internal_error); PORT_SetError(SEC_ERROR_KEYGEN_FAIL); return SECFailure; } return SECSuccess; } /* Handle an incoming KeyShare extension at the server and copy to * |xtnData->remoteKeyShares| for future use. The key * share is processed in tls13_HandleClientKeyShare(). */ SECStatus tls13_ServerHandleKeyShareXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; PRUint32 length; PORT_Assert(ss->sec.isServer); PORT_Assert(PR_CLIST_IS_EMPTY(&xtnData->remoteKeyShares)); if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { return SECSuccess; } SSL_TRC(3, ("%d: SSL3[%d]: handle key_share extension", SSL_GETPID(), ss->fd)); /* Redundant length because of TLS encoding (this vector consumes * the entire extension.) */ rv = ssl3_ExtConsumeHandshakeNumber(ss, &length, 2, &data->data, &data->len); if (rv != SECSuccess) goto loser; if (length != data->len) { /* Check for consistency */ PORT_SetError(SSL_ERROR_RX_MALFORMED_KEY_SHARE); goto loser; } while (data->len) { rv = tls13_HandleKeyShareEntry(ss, xtnData, data); if (rv != SECSuccess) goto loser; } return SECSuccess; loser: tls13_DestroyKeyShares(&xtnData->remoteKeyShares); return SECFailure; } SECStatus tls13_ServerSendKeyShareXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { SECStatus rv; sslEphemeralKeyPair *keyPair; /* There should be exactly one key share. */ PORT_Assert(!PR_CLIST_IS_EMPTY(&ss->ephemeralKeyPairs)); PORT_Assert(PR_PREV_LINK(&ss->ephemeralKeyPairs) == PR_NEXT_LINK(&ss->ephemeralKeyPairs)); keyPair = (sslEphemeralKeyPair *)PR_NEXT_LINK(&ss->ephemeralKeyPairs); rv = tls13_EncodeKeyShareEntry(buf, keyPair); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } /* Called by clients. * * struct { * opaque identity<0..2^16-1>; * uint32 obfuscated_ticket_age; * } PskIdentity; * * opaque PskBinderEntry<32..255>; * * struct { * select (Handshake.msg_type) { * case client_hello: * PskIdentity identities<6..2^16-1>; * PskBinderEntry binders<33..2^16-1>; * * case server_hello: * uint16 selected_identity; * }; * * } PreSharedKeyExtension; * Presently the only way to get a PSK is by resumption, so this is * really a ticket label and there will be at most one. */ SECStatus tls13_ClientSendPreSharedKeyXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { NewSessionTicket *session_ticket; PRTime age; const static PRUint8 binder[TLS13_MAX_FINISHED_SIZE] = { 0 }; unsigned int binderLen; SECStatus rv; /* We only set statelessResume on the client in TLS 1.3 code. */ if (!ss->statelessResume) { return SECSuccess; } /* Save where this extension starts so that if we have to add padding, it * can be inserted before this extension. */ PORT_Assert(buf->len >= 4); xtnData->lastXtnOffset = buf->len - 4; PORT_Assert(ss->vrange.max >= SSL_LIBRARY_VERSION_TLS_1_3); /* Send a single ticket identity. */ session_ticket = &ss->sec.ci.sid->u.ssl3.locked.sessionTicket; rv = sslBuffer_AppendNumber(buf, 2 + /* identity length */ session_ticket->ticket.len + /* ticket */ 4 /* obfuscated_ticket_age */, 2); if (rv != SECSuccess) goto loser; rv = sslBuffer_AppendVariable(buf, session_ticket->ticket.data, session_ticket->ticket.len, 2); if (rv != SECSuccess) goto loser; /* Obfuscated age. */ age = ssl_TimeUsec() - session_ticket->received_timestamp; age /= PR_USEC_PER_MSEC; age += session_ticket->ticket_age_add; rv = sslBuffer_AppendNumber(buf, age, 4); if (rv != SECSuccess) goto loser; /* Write out the binder list length. */ binderLen = tls13_GetHashSize(ss); rv = sslBuffer_AppendNumber(buf, binderLen + 1, 2); if (rv != SECSuccess) goto loser; /* Write zeroes for the binder for the moment. */ rv = sslBuffer_AppendVariable(buf, binder, binderLen, 1); if (rv != SECSuccess) goto loser; PRINT_BUF(50, (ss, "Sending PreSharedKey value", session_ticket->ticket.data, session_ticket->ticket.len)); xtnData->sentSessionTicketInClientHello = PR_TRUE; *added = PR_TRUE; return SECSuccess; loser: xtnData->ticketTimestampVerified = PR_FALSE; return SECFailure; } /* Handle a TLS 1.3 PreSharedKey Extension. We only accept PSKs * that contain session tickets. */ SECStatus tls13_ServerHandlePreSharedKeyXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECItem inner; SECStatus rv; unsigned int numIdentities = 0; unsigned int numBinders = 0; SECItem *appToken; SSL_TRC(3, ("%d: SSL3[%d]: handle pre_shared_key extension", SSL_GETPID(), ss->fd)); /* If we are doing < TLS 1.3, then ignore this. */ if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { return SECSuccess; } /* The application token is set via the cookie extension if this is the * second ClientHello. Don't set it twice. The cookie extension handler * sets |helloRetry| and that will have been called already because this * extension always comes last. */ if (!ss->ssl3.hs.helloRetry) { appToken = &xtnData->applicationToken; } else { appToken = NULL; } /* Parse the identities list. */ rv = ssl3_ExtConsumeHandshakeVariable(ss, &inner, 2, &data->data, &data->len); if (rv != SECSuccess) { return SECFailure; } while (inner.len) { SECItem label; PRUint32 obfuscatedAge; rv = ssl3_ExtConsumeHandshakeVariable(ss, &label, 2, &inner.data, &inner.len); if (rv != SECSuccess) return rv; if (!label.len) { goto alert_loser; } rv = ssl3_ExtConsumeHandshakeNumber(ss, &obfuscatedAge, 4, &inner.data, &inner.len); if (rv != SECSuccess) return rv; if (!numIdentities) { PRINT_BUF(50, (ss, "Handling PreSharedKey value", label.data, label.len)); rv = ssl3_ProcessSessionTicketCommon( CONST_CAST(sslSocket, ss), &label, appToken); /* This only happens if we have an internal error, not * a malformed ticket. Bogus tickets just don't resume * and return SECSuccess. */ if (rv != SECSuccess) return SECFailure; if (ss->sec.ci.sid) { /* xtnData->ticketAge contains the baseline we use for * calculating the ticket age (i.e., our RTT estimate less the * value of ticket_age_add). * * Add that to the obfuscated ticket age to recover the client's * view of the ticket age plus the estimated RTT. * * See ssl3_EncodeSessionTicket() for details. */ xtnData->ticketAge += obfuscatedAge; } } ++numIdentities; } xtnData->pskBindersLen = data->len; /* Parse the binders list. */ rv = ssl3_ExtConsumeHandshakeVariable(ss, &inner, 2, &data->data, &data->len); if (rv != SECSuccess) return SECFailure; if (data->len) { goto alert_loser; } while (inner.len) { SECItem binder; rv = ssl3_ExtConsumeHandshakeVariable(ss, &binder, 1, &inner.data, &inner.len); if (rv != SECSuccess) return rv; if (binder.len < 32) { goto alert_loser; } if (!numBinders) { xtnData->pskBinder = binder; } ++numBinders; } if (numBinders != numIdentities) goto alert_loser; /* Keep track of negotiated extensions. Note that this does not * mean we are resuming. */ xtnData->negotiated[xtnData->numNegotiated++] = ssl_tls13_pre_shared_key_xtn; return SECSuccess; alert_loser: ssl3_ExtSendAlert(ss, alert_fatal, illegal_parameter); PORT_SetError(SSL_ERROR_MALFORMED_PRE_SHARED_KEY); return SECFailure; } SECStatus tls13_ServerSendPreSharedKeyXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { SECStatus rv; /* We only process the first session ticket the client sends, * so the index is always 0. */ rv = sslBuffer_AppendNumber(buf, 0, 2); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } /* Handle a TLS 1.3 PreSharedKey Extension. We only accept PSKs * that contain session tickets. */ SECStatus tls13_ClientHandlePreSharedKeyXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { PRUint32 index; SECStatus rv; SSL_TRC(3, ("%d: SSL3[%d]: handle pre_shared_key extension", SSL_GETPID(), ss->fd)); /* The server must not send this extension when negotiating < TLS 1.3. */ if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { PORT_SetError(SSL_ERROR_EXTENSION_DISALLOWED_FOR_VERSION); return SECFailure; } rv = ssl3_ExtConsumeHandshakeNumber(ss, &index, 2, &data->data, &data->len); if (rv != SECSuccess) return SECFailure; /* This should be the end of the extension. */ if (data->len) { PORT_SetError(SSL_ERROR_MALFORMED_PRE_SHARED_KEY); return SECFailure; } /* We only sent one PSK label so index must be equal to 0 */ if (index) { PORT_SetError(SSL_ERROR_MALFORMED_PRE_SHARED_KEY); return SECFailure; } /* Keep track of negotiated extensions. */ xtnData->negotiated[xtnData->numNegotiated++] = ssl_tls13_pre_shared_key_xtn; return SECSuccess; } /* * struct { } EarlyDataIndication; */ SECStatus tls13_ClientSendEarlyDataXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { if (!tls13_ClientAllow0Rtt(ss, ss->sec.ci.sid)) { return SECSuccess; } *added = PR_TRUE; return SECSuccess; } SECStatus tls13_ServerHandleEarlyDataXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SSL_TRC(3, ("%d: TLS13[%d]: handle early_data extension", SSL_GETPID(), ss->fd)); /* If we are doing < TLS 1.3, then ignore this. */ if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { return SECSuccess; } if (ss->ssl3.hs.helloRetry) { ssl3_ExtSendAlert(ss, alert_fatal, unsupported_extension); PORT_SetError(SSL_ERROR_RX_UNEXPECTED_EXTENSION); return SECFailure; } if (data->len) { PORT_SetError(SSL_ERROR_MALFORMED_EARLY_DATA); return SECFailure; } xtnData->negotiated[xtnData->numNegotiated++] = ssl_tls13_early_data_xtn; return SECSuccess; } /* This will only be called if we also offered the extension. */ SECStatus tls13_ClientHandleEarlyDataXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SSL_TRC(3, ("%d: TLS13[%d]: handle early_data extension", SSL_GETPID(), ss->fd)); /* The server must not send this extension when negotiating < TLS 1.3. */ if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { PORT_SetError(SSL_ERROR_EXTENSION_DISALLOWED_FOR_VERSION); return SECFailure; } if (data->len) { PORT_SetError(SSL_ERROR_MALFORMED_EARLY_DATA); return SECFailure; } /* Keep track of negotiated extensions. */ xtnData->negotiated[xtnData->numNegotiated++] = ssl_tls13_early_data_xtn; return SECSuccess; } SECStatus tls13_ClientHandleTicketEarlyDataXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { PRUint32 utmp; SECStatus rv; SSL_TRC(3, ("%d: TLS13[%d]: handle ticket early_data extension", SSL_GETPID(), ss->fd)); /* The server must not send this extension when negotiating < TLS 1.3. */ if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { PORT_SetError(SSL_ERROR_EXTENSION_DISALLOWED_FOR_VERSION); return SECFailure; } rv = ssl3_ExtConsumeHandshake(ss, &utmp, sizeof(utmp), &data->data, &data->len); if (rv != SECSuccess) { PORT_SetError(SSL_ERROR_RX_MALFORMED_NEW_SESSION_TICKET); return SECFailure; } if (data->len) { PORT_SetError(SSL_ERROR_RX_MALFORMED_NEW_SESSION_TICKET); return SECFailure; } xtnData->max_early_data_size = PR_ntohl(utmp); return SECSuccess; } /* * struct { * select (Handshake.msg_type) { * case client_hello: * ProtocolVersion versions<2..254>; * case server_hello: * ProtocolVersion version; * }; * } SupportedVersions; */ SECStatus tls13_ClientSendSupportedVersionsXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { PRUint16 version; unsigned int lengthOffset; SECStatus rv; if (ss->vrange.max < SSL_LIBRARY_VERSION_TLS_1_3) { return SECSuccess; } SSL_TRC(3, ("%d: TLS13[%d]: client send supported_versions extension", SSL_GETPID(), ss->fd)); rv = sslBuffer_Skip(buf, 1, &lengthOffset); if (rv != SECSuccess) { return SECFailure; } for (version = ss->vrange.max; version >= ss->vrange.min; --version) { rv = sslBuffer_AppendNumber(buf, tls13_EncodeDraftVersion(version), 2); if (rv != SECSuccess) { return SECFailure; } } rv = sslBuffer_InsertLength(buf, lengthOffset, 1); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } SECStatus tls13_ServerSendSupportedVersionsXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { SECStatus rv; if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { return SECSuccess; } SSL_TRC(3, ("%d: TLS13[%d]: server send supported_versions extension", SSL_GETPID(), ss->fd)); rv = sslBuffer_AppendNumber( buf, tls13_EncodeDraftVersion(SSL_LIBRARY_VERSION_TLS_1_3), 2); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } /* * struct { * opaque cookie<1..2^16-1>; * } Cookie; */ SECStatus tls13_ClientHandleHrrCookie(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; SSL_TRC(3, ("%d: TLS13[%d]: handle cookie extension", SSL_GETPID(), ss->fd)); PORT_Assert(ss->vrange.max >= SSL_LIBRARY_VERSION_TLS_1_3); /* IMPORTANT: this is only valid while the HelloRetryRequest is still valid. */ rv = ssl3_ExtConsumeHandshakeVariable( ss, &CONST_CAST(sslSocket, ss)->ssl3.hs.cookie, 2, &data->data, &data->len); if (rv != SECSuccess) { PORT_SetError(SSL_ERROR_RX_MALFORMED_HELLO_RETRY_REQUEST); return SECFailure; } if (!ss->ssl3.hs.cookie.len || data->len) { ssl3_ExtSendAlert(ss, alert_fatal, decode_error); PORT_SetError(SSL_ERROR_RX_MALFORMED_HELLO_RETRY_REQUEST); return SECFailure; } return SECSuccess; } SECStatus tls13_ClientSendHrrCookieXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { SECStatus rv; if (ss->vrange.max < SSL_LIBRARY_VERSION_TLS_1_3 || !ss->ssl3.hs.cookie.len) { return SECSuccess; } SSL_TRC(3, ("%d: TLS13[%d]: send cookie extension", SSL_GETPID(), ss->fd)); rv = sslBuffer_AppendVariable(buf, ss->ssl3.hs.cookie.data, ss->ssl3.hs.cookie.len, 2); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } SECStatus tls13_ServerHandleCookieXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; SSL_TRC(3, ("%d: TLS13[%d]: handle cookie extension", SSL_GETPID(), ss->fd)); rv = ssl3_ExtConsumeHandshakeVariable(ss, &xtnData->cookie, 2, &data->data, &data->len); if (rv != SECSuccess) { return SECFailure; } if (xtnData->cookie.len == 0) { PORT_SetError(SSL_ERROR_RX_MALFORMED_SERVER_HELLO); return SECFailure; } if (data->len) { PORT_SetError(SSL_ERROR_RX_MALFORMED_SERVER_HELLO); return SECFailure; } /* Keep track of negotiated extensions. */ xtnData->negotiated[xtnData->numNegotiated++] = ssl_tls13_cookie_xtn; return SECSuccess; } /* * enum { psk_ke(0), psk_dhe_ke(1), (255) } PskKeyExchangeMode; * * struct { * PskKeyExchangeMode ke_modes<1..255>; * } PskKeyExchangeModes; */ SECStatus tls13_ClientSendPskModesXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { static const PRUint8 ke_modes[] = { tls13_psk_dh_ke }; SECStatus rv; if (ss->vrange.max < SSL_LIBRARY_VERSION_TLS_1_3 || ss->opt.noCache) { return SECSuccess; } SSL_TRC(3, ("%d: TLS13[%d]: send psk key exchange modes extension", SSL_GETPID(), ss->fd)); rv = sslBuffer_AppendVariable(buf, ke_modes, sizeof(ke_modes), 1); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } SECStatus tls13_ServerHandlePskModesXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; /* If we are doing < TLS 1.3, then ignore this. */ if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3) { return SECSuccess; } SSL_TRC(3, ("%d: TLS13[%d]: handle PSK key exchange modes extension", SSL_GETPID(), ss->fd)); /* IMPORTANT: We aren't copying these values, just setting pointers. * They will only be valid as long as the ClientHello is in memory. */ rv = ssl3_ExtConsumeHandshakeVariable(ss, &xtnData->psk_ke_modes, 1, &data->data, &data->len); if (rv != SECSuccess) return rv; if (!xtnData->psk_ke_modes.len || data->len) { PORT_SetError(SSL_ERROR_MALFORMED_PSK_KEY_EXCHANGE_MODES); return SECFailure; } /* Keep track of negotiated extensions. */ xtnData->negotiated[xtnData->numNegotiated++] = ssl_tls13_psk_key_exchange_modes_xtn; return SECSuccess; } SECStatus tls13_SendCertAuthoritiesXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { unsigned int calen; const SECItem *name; unsigned int nnames; SECStatus rv; PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_TLS_1_3); rv = ssl_GetCertificateRequestCAs(ss, &calen, &name, &nnames); if (rv != SECSuccess) { return SECFailure; } if (!calen) { return SECSuccess; } rv = sslBuffer_AppendNumber(buf, calen, 2); if (rv != SECSuccess) { return SECFailure; } while (nnames) { rv = sslBuffer_AppendVariable(buf, name->data, name->len, 2); if (rv != SECSuccess) { return SECFailure; } ++name; --nnames; } *added = PR_TRUE; return SECSuccess; } SECStatus tls13_ClientHandleCertAuthoritiesXtn(const sslSocket *ss, TLSExtensionData *xtnData, SECItem *data) { SECStatus rv; PLArenaPool *arena; if (!data->len) { ssl3_ExtSendAlert(ss, alert_fatal, decode_error); PORT_SetError(SSL_ERROR_RX_MALFORMED_CERT_REQUEST); return SECFailure; } arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); if (!arena) { PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); return SECFailure; } xtnData->certReqAuthorities.arena = arena; rv = ssl3_ParseCertificateRequestCAs((sslSocket *)ss, &data->data, &data->len, &xtnData->certReqAuthorities); if (rv != SECSuccess) { goto loser; } if (data->len) { ssl3_ExtSendAlert(ss, alert_fatal, decode_error); PORT_SetError(SSL_ERROR_RX_MALFORMED_CERT_REQUEST); goto loser; } return SECSuccess; loser: PORT_FreeArena(arena, PR_FALSE); xtnData->certReqAuthorities.arena = NULL; return SECFailure; } SECStatus tls13_ServerSendHrrKeyShareXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { SECStatus rv; PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_TLS_1_3); if (!xtnData->selectedGroup) { return SECSuccess; } rv = sslBuffer_AppendNumber(buf, xtnData->selectedGroup->name, 2); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; } SECStatus tls13_ServerSendHrrCookieXtn(const sslSocket *ss, TLSExtensionData *xtnData, sslBuffer *buf, PRBool *added) { SECStatus rv; PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_TLS_1_3); PORT_Assert(xtnData->cookie.len > 0); rv = sslBuffer_AppendVariable(buf, xtnData->cookie.data, xtnData->cookie.len, 2); if (rv != SECSuccess) { return SECFailure; } *added = PR_TRUE; return SECSuccess; }