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path: root/security/nss/lib/ssl/sslgathr.c
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Diffstat (limited to 'security/nss/lib/ssl/sslgathr.c')
-rw-r--r--security/nss/lib/ssl/sslgathr.c483
1 files changed, 0 insertions, 483 deletions
diff --git a/security/nss/lib/ssl/sslgathr.c b/security/nss/lib/ssl/sslgathr.c
deleted file mode 100644
index 8308ad194..000000000
--- a/security/nss/lib/ssl/sslgathr.c
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@@ -1,483 +0,0 @@
-/*
- * Gather (Read) entire SSL2 records from socket into buffer.
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1994-2000
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-/* $Id$ */
-#include "cert.h"
-#include "ssl.h"
-#include "sslimpl.h"
-#include "sslproto.h"
-
-/* Forward static declarations */
-static SECStatus ssl2_HandleV3HandshakeRecord(sslSocket *ss);
-
-/*
-** Gather a single record of data from the receiving stream. This code
-** first gathers the header (2 or 3 bytes long depending on the value of
-** the most significant bit in the first byte) then gathers up the data
-** for the record into gs->buf. This code handles non-blocking I/O
-** and is to be called multiple times until ss->sec.recordLen != 0.
-** This function decrypts the gathered record in place, in gs_buf.
- *
- * Caller must hold RecvBufLock.
- *
- * Returns +1 when it has gathered a complete SSLV2 record.
- * Returns 0 if it hits EOF.
- * Returns -1 (SECFailure) on any error
- * Returns -2 (SECWouldBlock) when it gathers an SSL v3 client hello header.
-**
-** The SSL2 Gather State machine has 4 states:
-** GS_INIT - Done reading in previous record. Haven't begun to read in
-** next record. When ssl2_GatherData is called with the machine
-** in this state, the machine will attempt to read the first 3
-** bytes of the SSL2 record header, and will advance the state
-** to GS_HEADER.
-**
-** GS_HEADER - The machine is in this state while waiting for the completion
-** of the first 3 bytes of the SSL2 record. When complete, the
-** machine will compute the remaining unread length of this record
-** and will initiate a read of that many bytes. The machine will
-** advance to one of two states, depending on whether the record
-** is encrypted (GS_MAC), or unencrypted (GS_DATA).
-**
-** GS_MAC - The machine is in this state while waiting for the remainder
-** of the SSL2 record to be read in. When the read is completed,
-** the machine checks the record for valid length, decrypts it,
-** and checks and discards the MAC, then advances to GS_INIT.
-**
-** GS_DATA - The machine is in this state while waiting for the remainder
-** of the unencrypted SSL2 record to be read in. Upon completion,
-** the machine advances to the GS_INIT state and returns the data.
-*/
-int
-ssl2_GatherData(sslSocket *ss, sslGather *gs, int flags)
-{
- unsigned char * bp;
- unsigned char * pBuf;
- int nb, err, rv;
-
- PORT_Assert( ss->opt.noLocks || ssl_HaveRecvBufLock(ss) );
-
- if (gs->state == GS_INIT) {
- /* Initialize gathering engine */
- gs->state = GS_HEADER;
- gs->remainder = 3;
- gs->count = 3;
- gs->offset = 0;
- gs->recordLen = 0;
- gs->recordPadding = 0;
- gs->hdr[2] = 0;
-
- gs->writeOffset = 0;
- gs->readOffset = 0;
- }
- if (gs->encrypted) {
- PORT_Assert(ss->sec.hash != 0);
- }
-
- pBuf = gs->buf.buf;
- for (;;) {
- SSL_TRC(30, ("%d: SSL[%d]: gather state %d (need %d more)",
- SSL_GETPID(), ss->fd, gs->state, gs->remainder));
- bp = ((gs->state != GS_HEADER) ? pBuf : gs->hdr) + gs->offset;
- nb = ssl_DefRecv(ss, bp, gs->remainder, flags);
- if (nb > 0) {
- PRINT_BUF(60, (ss, "raw gather data:", bp, nb));
- }
- if (nb == 0) {
- /* EOF */
- SSL_TRC(30, ("%d: SSL[%d]: EOF", SSL_GETPID(), ss->fd));
- rv = 0;
- break;
- }
- if (nb < 0) {
- SSL_DBG(("%d: SSL[%d]: recv error %d", SSL_GETPID(), ss->fd,
- PR_GetError()));
- rv = SECFailure;
- break;
- }
-
- gs->offset += nb;
- gs->remainder -= nb;
-
- if (gs->remainder > 0) {
- continue;
- }
-
- /* Probably finished this piece */
- switch (gs->state) {
- case GS_HEADER:
- if ((ss->opt.enableSSL3 || ss->opt.enableTLS) && !ss->firstHsDone) {
-
- PORT_Assert( ss->opt.noLocks || ssl_Have1stHandshakeLock(ss) );
-
- /* If this looks like an SSL3 handshake record,
- ** and we're expecting an SSL2 Hello message from our peer,
- ** handle it here.
- */
- if (gs->hdr[0] == content_handshake) {
- if ((ss->nextHandshake == ssl2_HandleClientHelloMessage) ||
- (ss->nextHandshake == ssl2_HandleServerHelloMessage)) {
- rv = ssl2_HandleV3HandshakeRecord(ss);
- if (rv == SECFailure) {
- return SECFailure;
- }
- }
- /* XXX_1 The call stack to here is:
- * ssl_Do1stHandshake -> ssl_GatherRecord1stHandshake ->
- * ssl2_GatherRecord -> here.
- * We want to return all the way out to ssl_Do1stHandshake,
- * and have it call ssl_GatherRecord1stHandshake again.
- * ssl_GatherRecord1stHandshake will call
- * ssl3_GatherCompleteHandshake when it is called again.
- *
- * Returning SECWouldBlock here causes
- * ssl_GatherRecord1stHandshake to return without clearing
- * ss->handshake, ensuring that ssl_Do1stHandshake will
- * call it again immediately.
- *
- * If we return 1 here, ssl_GatherRecord1stHandshake will
- * clear ss->handshake before returning, and thus will not
- * be called again by ssl_Do1stHandshake.
- */
- return SECWouldBlock;
- } else if (gs->hdr[0] == content_alert) {
- if (ss->nextHandshake == ssl2_HandleServerHelloMessage) {
- /* XXX This is a hack. We're assuming that any failure
- * XXX on the client hello is a failure to match
- * XXX ciphers.
- */
- PORT_SetError(SSL_ERROR_NO_CYPHER_OVERLAP);
- return SECFailure;
- }
- }
- } /* ((ss->opt.enableSSL3 || ss->opt.enableTLS) && !ss->firstHsDone) */
-
- /* we've got the first 3 bytes. The header may be two or three. */
- if (gs->hdr[0] & 0x80) {
- /* This record has a 2-byte header, and no padding */
- gs->count = ((gs->hdr[0] & 0x7f) << 8) | gs->hdr[1];
- gs->recordPadding = 0;
- } else {
- /* This record has a 3-byte header that is all read in now. */
- gs->count = ((gs->hdr[0] & 0x3f) << 8) | gs->hdr[1];
- /* is_escape = (gs->hdr[0] & 0x40) != 0; */
- gs->recordPadding = gs->hdr[2];
- }
- if (!gs->count) {
- PORT_SetError(SSL_ERROR_RX_RECORD_TOO_LONG);
- goto cleanup;
- }
-
- if (gs->count > gs->buf.space) {
- err = sslBuffer_Grow(&gs->buf, gs->count);
- if (err) {
- return err;
- }
- pBuf = gs->buf.buf;
- }
-
-
- if (gs->hdr[0] & 0x80) {
- /* we've already read in the first byte of the body.
- ** Put it into the buffer.
- */
- pBuf[0] = gs->hdr[2];
- gs->offset = 1;
- gs->remainder = gs->count - 1;
- } else {
- gs->offset = 0;
- gs->remainder = gs->count;
- }
-
- if (gs->encrypted) {
- gs->state = GS_MAC;
- gs->recordLen = gs->count - gs->recordPadding
- - ss->sec.hash->length;
- } else {
- gs->state = GS_DATA;
- gs->recordLen = gs->count;
- }
-
- break;
-
-
- case GS_MAC:
- /* Have read in entire rest of the ciphertext.
- ** Check for valid length.
- ** Decrypt it.
- ** Check the MAC.
- */
- PORT_Assert(gs->encrypted);
-
- {
- unsigned int macLen;
- int nout;
- unsigned char mac[SSL_MAX_MAC_BYTES];
-
- ssl_GetSpecReadLock(ss); /**********************************/
-
- /* If this is a stream cipher, blockSize will be 1,
- * and this test will always be false.
- * If this is a block cipher, this will detect records
- * that are not a multiple of the blocksize in length.
- */
- if (gs->count & (ss->sec.blockSize - 1)) {
- /* This is an error. Sender is misbehaving */
- SSL_DBG(("%d: SSL[%d]: sender, count=%d blockSize=%d",
- SSL_GETPID(), ss->fd, gs->count,
- ss->sec.blockSize));
- PORT_SetError(SSL_ERROR_BAD_BLOCK_PADDING);
- rv = SECFailure;
- goto spec_locked_done;
- }
- PORT_Assert(gs->count == gs->offset);
-
- if (gs->offset == 0) {
- rv = 0; /* means EOF. */
- goto spec_locked_done;
- }
-
- /* Decrypt the portion of data that we just recieved.
- ** Decrypt it in place.
- */
- rv = (*ss->sec.dec)(ss->sec.readcx, pBuf, &nout, gs->offset,
- pBuf, gs->offset);
- if (rv != SECSuccess) {
- goto spec_locked_done;
- }
-
-
- /* Have read in all the MAC portion of record
- **
- ** Prepare MAC by resetting it and feeding it the shared secret
- */
- macLen = ss->sec.hash->length;
- if (gs->offset >= macLen) {
- uint32 sequenceNumber = ss->sec.rcvSequence++;
- unsigned char seq[4];
-
- seq[0] = (unsigned char) (sequenceNumber >> 24);
- seq[1] = (unsigned char) (sequenceNumber >> 16);
- seq[2] = (unsigned char) (sequenceNumber >> 8);
- seq[3] = (unsigned char) (sequenceNumber);
-
- (*ss->sec.hash->begin)(ss->sec.hashcx);
- (*ss->sec.hash->update)(ss->sec.hashcx, ss->sec.rcvSecret.data,
- ss->sec.rcvSecret.len);
- (*ss->sec.hash->update)(ss->sec.hashcx, pBuf + macLen,
- gs->offset - macLen);
- (*ss->sec.hash->update)(ss->sec.hashcx, seq, 4);
- (*ss->sec.hash->end)(ss->sec.hashcx, mac, &macLen, macLen);
- }
-
- PORT_Assert(macLen == ss->sec.hash->length);
-
- ssl_ReleaseSpecReadLock(ss); /******************************/
-
- if (PORT_Memcmp(mac, pBuf, macLen) != 0) {
- /* MAC's didn't match... */
- SSL_DBG(("%d: SSL[%d]: mac check failed, seq=%d",
- SSL_GETPID(), ss->fd, ss->sec.rcvSequence));
- PRINT_BUF(1, (ss, "computed mac:", mac, macLen));
- PRINT_BUF(1, (ss, "received mac:", pBuf, macLen));
- PORT_SetError(SSL_ERROR_BAD_MAC_READ);
- rv = SECFailure;
- goto cleanup;
- }
-
-
- PORT_Assert(gs->recordPadding + macLen <= gs->offset);
- if (gs->recordPadding + macLen <= gs->offset) {
- gs->recordOffset = macLen;
- gs->readOffset = macLen;
- gs->writeOffset = gs->offset - gs->recordPadding;
- rv = 1;
- } else {
- PORT_SetError(SSL_ERROR_BAD_BLOCK_PADDING);
-cleanup:
- /* nothing in the buffer any more. */
- gs->recordOffset = 0;
- gs->readOffset = 0;
- gs->writeOffset = 0;
- rv = SECFailure;
- }
-
- gs->recordLen = gs->writeOffset - gs->readOffset;
- gs->recordPadding = 0; /* forget we did any padding. */
- gs->state = GS_INIT;
-
-
- if (rv > 0) {
- PRINT_BUF(50, (ss, "recv clear record:",
- pBuf + gs->recordOffset, gs->recordLen));
- }
- return rv;
-
-spec_locked_done:
- ssl_ReleaseSpecReadLock(ss);
- return rv;
- }
-
- case GS_DATA:
- /* Have read in all the DATA portion of record */
-
- gs->recordOffset = 0;
- gs->readOffset = 0;
- gs->writeOffset = gs->offset;
- PORT_Assert(gs->recordLen == gs->writeOffset - gs->readOffset);
- gs->recordLen = gs->offset;
- gs->recordPadding = 0;
- gs->state = GS_INIT;
-
- ++ss->sec.rcvSequence;
-
- PRINT_BUF(50, (ss, "recv clear record:",
- pBuf + gs->recordOffset, gs->recordLen));
- return 1;
-
- } /* end switch gs->state */
- } /* end gather loop. */
- return rv;
-}
-
-/*
-** Gather a single record of data from the receiving stream. This code
-** first gathers the header (2 or 3 bytes long depending on the value of
-** the most significant bit in the first byte) then gathers up the data
-** for the record into the readBuf. This code handles non-blocking I/O
-** and is to be called multiple times until ss->sec.recordLen != 0.
- *
- * Returns +1 when it has gathered a complete SSLV2 record.
- * Returns 0 if it hits EOF.
- * Returns -1 (SECFailure) on any error
- * Returns -2 (SECWouldBlock)
- *
- * Called by ssl_GatherRecord1stHandshake in sslcon.c,
- * and by DoRecv in sslsecur.c
- * Caller must hold RecvBufLock.
- */
-int
-ssl2_GatherRecord(sslSocket *ss, int flags)
-{
- return ssl2_GatherData(ss, &ss->gs, flags);
-}
-
-/*
- * Returns +1 when it has gathered a complete SSLV2 record.
- * Returns 0 if it hits EOF.
- * Returns -1 (SECFailure) on any error
- * Returns -2 (SECWouldBlock)
- *
- * Called from SocksStartGather in sslsocks.c
- * Caller must hold RecvBufLock.
- */
-int
-ssl2_StartGatherBytes(sslSocket *ss, sslGather *gs, unsigned int count)
-{
- int rv;
-
- PORT_Assert( ss->opt.noLocks || ssl_HaveRecvBufLock(ss) );
- gs->state = GS_DATA;
- gs->remainder = count;
- gs->count = count;
- gs->offset = 0;
- if (count > gs->buf.space) {
- rv = sslBuffer_Grow(&gs->buf, count);
- if (rv) {
- return rv;
- }
- }
- return ssl2_GatherData(ss, gs, 0);
-}
-
-/* Caller should hold RecvBufLock. */
-SECStatus
-ssl_InitGather(sslGather *gs)
-{
- SECStatus status;
-
- gs->state = GS_INIT;
- gs->writeOffset = 0;
- gs->readOffset = 0;
- status = sslBuffer_Grow(&gs->buf, 4096);
- return status;
-}
-
-/* Caller must hold RecvBufLock. */
-void
-ssl_DestroyGather(sslGather *gs)
-{
- if (gs) { /* the PORT_*Free functions check for NULL pointers. */
- PORT_ZFree(gs->buf.buf, gs->buf.space);
- PORT_Free(gs->inbuf.buf);
- }
-}
-
-/* Caller must hold RecvBufLock. */
-static SECStatus
-ssl2_HandleV3HandshakeRecord(sslSocket *ss)
-{
- SECStatus rv;
- SSL3ProtocolVersion version = (ss->gs.hdr[1] << 8) | ss->gs.hdr[2];
-
- PORT_Assert( ss->opt.noLocks || ssl_HaveRecvBufLock(ss) );
- PORT_Assert( ss->opt.noLocks || ssl_Have1stHandshakeLock(ss) );
-
- /* We've read in 3 bytes, there are 2 more to go in an ssl3 header. */
- ss->gs.remainder = 2;
- ss->gs.count = 0;
-
- /* Clearing these handshake pointers ensures that
- * ssl_Do1stHandshake won't call ssl2_HandleMessage when we return.
- */
- ss->nextHandshake = 0;
- ss->securityHandshake = 0;
-
- /* Setting ss->version to an SSL 3.x value will cause
- ** ssl_GatherRecord1stHandshake to invoke ssl3_GatherCompleteHandshake()
- ** the next time it is called.
- **/
- rv = ssl3_NegotiateVersion(ss, version);
- if (rv != SECSuccess) {
- return rv;
- }
-
- ss->sec.send = ssl3_SendApplicationData;
-
- return SECSuccess;
-}
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