15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Gather (Read) entire SSL2 records from socket into buffer. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 42a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) * This Source Code Form is subject to the terms of the Mozilla Public 52a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) * License, v. 2.0. If a copy of the MPL was not distributed with this 62a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "cert.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ssl.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "sslimpl.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "sslproto.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Forward static declarations */ 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static SECStatus ssl2_HandleV3HandshakeRecord(sslSocket *ss); 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** Gather a single record of data from the receiving stream. This code 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** first gathers the header (2 or 3 bytes long depending on the value of 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** the most significant bit in the first byte) then gathers up the data 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** for the record into gs->buf. This code handles non-blocking I/O 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** and is to be called multiple times until ss->sec.recordLen != 0. 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** This function decrypts the gathered record in place, in gs_buf. 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Caller must hold RecvBufLock. 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns +1 when it has gathered a complete SSLV2 record. 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns 0 if it hits EOF. 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns -1 (SECFailure) on any error 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns -2 (SECWouldBlock) when it gathers an SSL v3 client hello header. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** The SSL2 Gather State machine has 4 states: 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** GS_INIT - Done reading in previous record. Haven't begun to read in 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** next record. When ssl2_GatherData is called with the machine 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** in this state, the machine will attempt to read the first 3 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** bytes of the SSL2 record header, and will advance the state 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** to GS_HEADER. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** GS_HEADER - The machine is in this state while waiting for the completion 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** of the first 3 bytes of the SSL2 record. When complete, the 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** machine will compute the remaining unread length of this record 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** and will initiate a read of that many bytes. The machine will 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** advance to one of two states, depending on whether the record 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** is encrypted (GS_MAC), or unencrypted (GS_DATA). 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** GS_MAC - The machine is in this state while waiting for the remainder 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** of the SSL2 record to be read in. When the read is completed, 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** the machine checks the record for valid length, decrypts it, 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** and checks and discards the MAC, then advances to GS_INIT. 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** GS_DATA - The machine is in this state while waiting for the remainder 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** of the unencrypted SSL2 record to be read in. Upon completion, 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** the machine advances to the GS_INIT state and returns the data. 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)*/ 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ssl2_GatherData(sslSocket *ss, sslGather *gs, int flags) 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned char * bp; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned char * pBuf; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int nb, err, rv; 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert( ss->opt.noLocks || ssl_HaveRecvBufLock(ss) ); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->state == GS_INIT) { 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Initialize gathering engine */ 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->state = GS_HEADER; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->remainder = 3; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->count = 3; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->offset = 0; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordLen = 0; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordPadding = 0; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->hdr[2] = 0; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->writeOffset = 0; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->readOffset = 0; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->encrypted) { 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert(ss->sec.hash != 0); 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pBuf = gs->buf.buf; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (;;) { 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_TRC(30, ("%d: SSL[%d]: gather state %d (need %d more)", 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_GETPID(), ss->fd, gs->state, gs->remainder)); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bp = ((gs->state != GS_HEADER) ? pBuf : gs->hdr) + gs->offset; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) nb = ssl_DefRecv(ss, bp, gs->remainder, flags); 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (nb > 0) { 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PRINT_BUF(60, (ss, "raw gather data:", bp, nb)); 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (nb == 0) { 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* EOF */ 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_TRC(30, ("%d: SSL[%d]: EOF", SSL_GETPID(), ss->fd)); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = 0; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (nb < 0) { 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_DBG(("%d: SSL[%d]: recv error %d", SSL_GETPID(), ss->fd, 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PR_GetError())); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = SECFailure; 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->offset += nb; 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->remainder -= nb; 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->remainder > 0) { 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) continue; 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Probably finished this piece */ 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (gs->state) { 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case GS_HEADER: 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!SSL3_ALL_VERSIONS_DISABLED(&ss->vrange) && !ss->firstHsDone) { 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert( ss->opt.noLocks || ssl_Have1stHandshakeLock(ss) ); 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* If this looks like an SSL3 handshake record, 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** and we're expecting an SSL2 Hello message from our peer, 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** handle it here. 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->hdr[0] == content_handshake) { 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((ss->nextHandshake == ssl2_HandleClientHelloMessage) || 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (ss->nextHandshake == ssl2_HandleServerHelloMessage)) { 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = ssl2_HandleV3HandshakeRecord(ss); 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (rv == SECFailure) { 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SECFailure; 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* XXX_1 The call stack to here is: 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ssl_Do1stHandshake -> ssl_GatherRecord1stHandshake -> 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ssl2_GatherRecord -> here. 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * We want to return all the way out to ssl_Do1stHandshake, 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * and have it call ssl_GatherRecord1stHandshake again. 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ssl_GatherRecord1stHandshake will call 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ssl3_GatherCompleteHandshake when it is called again. 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returning SECWouldBlock here causes 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ssl_GatherRecord1stHandshake to return without clearing 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ss->handshake, ensuring that ssl_Do1stHandshake will 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * call it again immediately. 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * If we return 1 here, ssl_GatherRecord1stHandshake will 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * clear ss->handshake before returning, and thus will not 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * be called again by ssl_Do1stHandshake. 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SECWouldBlock; 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else if (gs->hdr[0] == content_alert) { 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ss->nextHandshake == ssl2_HandleServerHelloMessage) { 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* XXX This is a hack. We're assuming that any failure 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * XXX on the client hello is a failure to match 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * XXX ciphers. 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_SetError(SSL_ERROR_NO_CYPHER_OVERLAP); 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SECFailure; 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* we've got the first 3 bytes. The header may be two or three. */ 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->hdr[0] & 0x80) { 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* This record has a 2-byte header, and no padding */ 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->count = ((gs->hdr[0] & 0x7f) << 8) | gs->hdr[1]; 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordPadding = 0; 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* This record has a 3-byte header that is all read in now. */ 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->count = ((gs->hdr[0] & 0x3f) << 8) | gs->hdr[1]; 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* is_escape = (gs->hdr[0] & 0x40) != 0; */ 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordPadding = gs->hdr[2]; 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!gs->count) { 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_SetError(SSL_ERROR_RX_RECORD_TOO_LONG); 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) goto cleanup; 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->count > gs->buf.space) { 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) err = sslBuffer_Grow(&gs->buf, gs->count); 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (err) { 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return err; 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pBuf = gs->buf.buf; 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->hdr[0] & 0x80) { 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* we've already read in the first byte of the body. 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** Put it into the buffer. 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pBuf[0] = gs->hdr[2]; 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->offset = 1; 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->remainder = gs->count - 1; 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->offset = 0; 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->remainder = gs->count; 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->encrypted) { 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->state = GS_MAC; 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordLen = gs->count - gs->recordPadding 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) - ss->sec.hash->length; 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->state = GS_DATA; 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordLen = gs->count; 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case GS_MAC: 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Have read in entire rest of the ciphertext. 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** Check for valid length. 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** Decrypt it. 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** Check the MAC. 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert(gs->encrypted); 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned int macLen; 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int nout; 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned char mac[SSL_MAX_MAC_BYTES]; 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ssl_GetSpecReadLock(ss); /**********************************/ 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* If this is a stream cipher, blockSize will be 1, 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * and this test will always be false. 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * If this is a block cipher, this will detect records 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * that are not a multiple of the blocksize in length. 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->count & (ss->sec.blockSize - 1)) { 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* This is an error. Sender is misbehaving */ 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_DBG(("%d: SSL[%d]: sender, count=%d blockSize=%d", 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_GETPID(), ss->fd, gs->count, 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss->sec.blockSize)); 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_SetError(SSL_ERROR_BAD_BLOCK_PADDING); 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = SECFailure; 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) goto spec_locked_done; 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert(gs->count == gs->offset); 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->offset == 0) { 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = 0; /* means EOF. */ 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) goto spec_locked_done; 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Decrypt the portion of data that we just received. 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** Decrypt it in place. 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = (*ss->sec.dec)(ss->sec.readcx, pBuf, &nout, gs->offset, 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pBuf, gs->offset); 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (rv != SECSuccess) { 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) goto spec_locked_done; 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Have read in all the MAC portion of record 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** Prepare MAC by resetting it and feeding it the shared secret 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) macLen = ss->sec.hash->length; 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->offset >= macLen) { 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PRUint32 sequenceNumber = ss->sec.rcvSequence++; 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned char seq[4]; 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) seq[0] = (unsigned char) (sequenceNumber >> 24); 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) seq[1] = (unsigned char) (sequenceNumber >> 16); 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) seq[2] = (unsigned char) (sequenceNumber >> 8); 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) seq[3] = (unsigned char) (sequenceNumber); 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (*ss->sec.hash->begin)(ss->sec.hashcx); 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (*ss->sec.hash->update)(ss->sec.hashcx, ss->sec.rcvSecret.data, 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss->sec.rcvSecret.len); 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (*ss->sec.hash->update)(ss->sec.hashcx, pBuf + macLen, 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->offset - macLen); 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (*ss->sec.hash->update)(ss->sec.hashcx, seq, 4); 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (*ss->sec.hash->end)(ss->sec.hashcx, mac, &macLen, macLen); 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert(macLen == ss->sec.hash->length); 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ssl_ReleaseSpecReadLock(ss); /******************************/ 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (NSS_SecureMemcmp(mac, pBuf, macLen) != 0) { 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* MAC's didn't match... */ 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_DBG(("%d: SSL[%d]: mac check failed, seq=%d", 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SSL_GETPID(), ss->fd, ss->sec.rcvSequence)); 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PRINT_BUF(1, (ss, "computed mac:", mac, macLen)); 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PRINT_BUF(1, (ss, "received mac:", pBuf, macLen)); 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_SetError(SSL_ERROR_BAD_MAC_READ); 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = SECFailure; 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) goto cleanup; 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ssl_ReleaseSpecReadLock(ss); /******************************/ 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs->recordPadding + macLen <= gs->offset) { 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordOffset = macLen; 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->readOffset = macLen; 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->writeOffset = gs->offset - gs->recordPadding; 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = 1; 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_SetError(SSL_ERROR_BAD_BLOCK_PADDING); 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)cleanup: 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* nothing in the buffer any more. */ 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordOffset = 0; 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->readOffset = 0; 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->writeOffset = 0; 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = SECFailure; 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordLen = gs->writeOffset - gs->readOffset; 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordPadding = 0; /* forget we did any padding. */ 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->state = GS_INIT; 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (rv > 0) { 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PRINT_BUF(50, (ss, "recv clear record:", 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pBuf + gs->recordOffset, gs->recordLen)); 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return rv; 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)spec_locked_done: 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ssl_ReleaseSpecReadLock(ss); 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return rv; 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case GS_DATA: 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Have read in all the DATA portion of record */ 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordOffset = 0; 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->readOffset = 0; 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->writeOffset = gs->offset; 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert(gs->recordLen == gs->writeOffset - gs->readOffset); 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordLen = gs->offset; 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->recordPadding = 0; 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->state = GS_INIT; 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ++ss->sec.rcvSequence; 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PRINT_BUF(50, (ss, "recv clear record:", 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pBuf + gs->recordOffset, gs->recordLen)); 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } /* end switch gs->state */ 3415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } /* end gather loop. */ 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return rv; 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** Gather a single record of data from the receiving stream. This code 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** first gathers the header (2 or 3 bytes long depending on the value of 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** the most significant bit in the first byte) then gathers up the data 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** for the record into the readBuf. This code handles non-blocking I/O 3505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)** and is to be called multiple times until ss->sec.recordLen != 0. 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns +1 when it has gathered a complete SSLV2 record. 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns 0 if it hits EOF. 3545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns -1 (SECFailure) on any error 3555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns -2 (SECWouldBlock) 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Called by ssl_GatherRecord1stHandshake in sslcon.c, 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * and by DoRecv in sslsecur.c 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Caller must hold RecvBufLock. 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 3615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ssl2_GatherRecord(sslSocket *ss, int flags) 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ssl2_GatherData(ss, &ss->gs, flags); 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns +1 when it has gathered a complete SSLV2 record. 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns 0 if it hits EOF. 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns -1 (SECFailure) on any error 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Returns -2 (SECWouldBlock) 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Called from SocksStartGather in sslsocks.c 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Caller must hold RecvBufLock. 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ssl2_StartGatherBytes(sslSocket *ss, sslGather *gs, unsigned int count) 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int rv; 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert( ss->opt.noLocks || ssl_HaveRecvBufLock(ss) ); 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->state = GS_DATA; 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->remainder = count; 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->count = count; 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->offset = 0; 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (count > gs->buf.space) { 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = sslBuffer_Grow(&gs->buf, count); 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (rv) { 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return rv; 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ssl2_GatherData(ss, gs, 0); 3935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Caller should hold RecvBufLock. */ 3965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SECStatus 3975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ssl_InitGather(sslGather *gs) 3985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SECStatus status; 4005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->state = GS_INIT; 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->writeOffset = 0; 4035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->readOffset = 0; 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->dtlsPacketOffset = 0; 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gs->dtlsPacket.len = 0; 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) status = sslBuffer_Grow(&gs->buf, 4096); 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return status; 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Caller must hold RecvBufLock. */ 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ssl_DestroyGather(sslGather *gs) 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gs) { /* the PORT_*Free functions check for NULL pointers. */ 4155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_ZFree(gs->buf.buf, gs->buf.space); 4165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Free(gs->inbuf.buf); 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Free(gs->dtlsPacket.buf); 4185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Caller must hold RecvBufLock. */ 4225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static SECStatus 4235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ssl2_HandleV3HandshakeRecord(sslSocket *ss) 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SECStatus rv; 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert( ss->opt.noLocks || ssl_HaveRecvBufLock(ss) ); 4285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PORT_Assert( ss->opt.noLocks || ssl_Have1stHandshakeLock(ss) ); 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* We've read in 3 bytes, there are 2 more to go in an ssl3 header. */ 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss->gs.remainder = 2; 4325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss->gs.count = 0; 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Clearing these handshake pointers ensures that 4355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ssl_Do1stHandshake won't call ssl2_HandleMessage when we return. 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss->nextHandshake = 0; 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss->securityHandshake = 0; 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Setting ss->version to an SSL 3.x value will cause 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** ssl_GatherRecord1stHandshake to invoke ssl3_GatherCompleteHandshake() 4425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ** the next time it is called. 4435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) **/ 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rv = ssl3_NegotiateVersion(ss, SSL_LIBRARY_VERSION_MAX_SUPPORTED, 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PR_TRUE); 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (rv != SECSuccess) { 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return rv; 4485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ss->sec.send = ssl3_SendApplicationData; 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SECSuccess; 4535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 454