Removing NSS files and USE_OPENSSL flag

net/third_party/nss/ssl/sslgathr.c

Index: net/third_party/nss/ssl/sslgathr.c
diff --git a/net/third_party/nss/ssl/sslgathr.c b/net/third_party/nss/ssl/sslgathr.c
deleted file mode 100644
index 48d615ec0de5472440fa3d61fb2ec8831efd4c8b..0000000000000000000000000000000000000000
--- a/net/third_party/nss/ssl/sslgathr.c
+++ /dev/null
@@ -1,421 +0,0 @@
-/*
- * Gather (Read) entire SSL2 records from socket into buffer.
- *
- * 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 "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 (!SSL3_ALL_VERSIONS_DISABLED(&ss->vrange) && !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;
-                        }
-                    }
-                }
-
-                /* 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 received.
-                    ** 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) {
-                        PRUint32 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 (NSS_SecureMemcmp(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;
-                        }
-                    } else {
-                        ssl_ReleaseSpecReadLock(ss); /******************************/
-                    }
-
-                    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);
-}
-
-/* Caller should hold RecvBufLock. */
-SECStatus
-ssl_InitGather(sslGather *gs)
-{
-    SECStatus status;
-
-    gs->state = GS_INIT;
-    gs->writeOffset = 0;
-    gs->readOffset = 0;
-    gs->dtlsPacketOffset = 0;
-    gs->dtlsPacket.len = 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);
-        PORT_Free(gs->dtlsPacket.buf);
-    }
-}
-
-/* Caller must hold RecvBufLock. */
-static SECStatus
-ssl2_HandleV3HandshakeRecord(sslSocket *ss)
-{
-    SECStatus rv;
-
-    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, SSL_LIBRARY_VERSION_MAX_SUPPORTED,
-                               PR_TRUE);
-    if (rv != SECSuccess) {
-        return rv;
-    }
-
-    ss->sec.send = ssl3_SendApplicationData;
-
-    return SECSuccess;
-}