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path: root/security/nss/lib/ssl/ssl3gthr.c
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Diffstat (limited to 'security/nss/lib/ssl/ssl3gthr.c')
-rw-r--r--security/nss/lib/ssl/ssl3gthr.c109
1 files changed, 62 insertions, 47 deletions
diff --git a/security/nss/lib/ssl/ssl3gthr.c b/security/nss/lib/ssl/ssl3gthr.c
index 8b323bb054..5ea7cc249e 100644
--- a/security/nss/lib/ssl/ssl3gthr.c
+++ b/security/nss/lib/ssl/ssl3gthr.c
@@ -158,6 +158,7 @@ ssl3_GatherData(sslSocket *ss, sslGather *gs, int flags, ssl2Gather *ssl2gs)
* the length of the following encrypted data, and then
* read in the rest of the record into gs->inbuf. */
gs->remainder = (gs->hdr[3] << 8) | gs->hdr[4];
+ gs->hdrLen = SSL3_RECORD_HEADER_LENGTH;
} else {
/* Probably an SSLv2 record header. No need to handle any
* security escapes (gs->hdr[0] & 0x40) as we wouldn't get
@@ -264,8 +265,9 @@ static int
dtls_GatherData(sslSocket *ss, sslGather *gs, int flags)
{
int nb;
- int err;
- int rv = 1;
+ PRUint8 contentType;
+ unsigned int headerLen;
+ SECStatus rv;
SSL_TRC(30, ("dtls_GatherData"));
@@ -285,81 +287,97 @@ dtls_GatherData(sslSocket *ss, sslGather *gs, int flags)
** to 13 (the size of the record header).
*/
if (gs->dtlsPacket.space < MAX_FRAGMENT_LENGTH + 2048 + 13) {
- err = sslBuffer_Grow(&gs->dtlsPacket,
- MAX_FRAGMENT_LENGTH + 2048 + 13);
- if (err) { /* realloc has set error code to no mem. */
- return err;
+ rv = sslBuffer_Grow(&gs->dtlsPacket,
+ MAX_FRAGMENT_LENGTH + 2048 + 13);
+ if (rv != SECSuccess) {
+ return -1; /* Code already set. */
}
}
/* recv() needs to read a full datagram at a time */
nb = ssl_DefRecv(ss, gs->dtlsPacket.buf, gs->dtlsPacket.space, flags);
-
if (nb > 0) {
PRINT_BUF(60, (ss, "raw gather data:", gs->dtlsPacket.buf, nb));
} else if (nb == 0) {
/* EOF */
SSL_TRC(30, ("%d: SSL3[%d]: EOF", SSL_GETPID(), ss->fd));
- rv = 0;
- return rv;
+ return 0;
} else /* if (nb < 0) */ {
SSL_DBG(("%d: SSL3[%d]: recv error %d", SSL_GETPID(), ss->fd,
PR_GetError()));
- rv = SECFailure;
- return rv;
+ return -1;
}
gs->dtlsPacket.len = nb;
}
+ contentType = gs->dtlsPacket.buf[gs->dtlsPacketOffset];
+ if (dtls_IsLongHeader(ss->version, contentType)) {
+ headerLen = 13;
+ } else if (contentType == content_application_data) {
+ headerLen = 7;
+ } else if ((contentType & 0xe0) == 0x20) {
+ headerLen = 2;
+ } else {
+ SSL_DBG(("%d: SSL3[%d]: invalid first octet (%d) for DTLS",
+ SSL_GETPID(), ss->fd, contentType));
+ PORT_SetError(SSL_ERROR_RX_UNKNOWN_RECORD_TYPE);
+ gs->dtlsPacketOffset = 0;
+ gs->dtlsPacket.len = 0;
+ return -1;
+ }
+
/* At this point we should have >=1 complete records lined up in
* dtlsPacket. Read off the header.
*/
- if ((gs->dtlsPacket.len - gs->dtlsPacketOffset) < 13) {
+ if ((gs->dtlsPacket.len - gs->dtlsPacketOffset) < headerLen) {
SSL_DBG(("%d: SSL3[%d]: rest of DTLS packet "
"too short to contain header",
SSL_GETPID(), ss->fd));
- PR_SetError(PR_WOULD_BLOCK_ERROR, 0);
+ PORT_SetError(PR_WOULD_BLOCK_ERROR);
gs->dtlsPacketOffset = 0;
gs->dtlsPacket.len = 0;
- rv = SECFailure;
- return rv;
+ return -1;
}
- memcpy(gs->hdr, gs->dtlsPacket.buf + gs->dtlsPacketOffset, 13);
- gs->dtlsPacketOffset += 13;
+ memcpy(gs->hdr, SSL_BUFFER_BASE(&gs->dtlsPacket) + gs->dtlsPacketOffset,
+ headerLen);
+ gs->hdrLen = headerLen;
+ gs->dtlsPacketOffset += headerLen;
/* Have received SSL3 record header in gs->hdr. */
- gs->remainder = (gs->hdr[11] << 8) | gs->hdr[12];
+ if (headerLen == 13) {
+ gs->remainder = (gs->hdr[11] << 8) | gs->hdr[12];
+ } else if (headerLen == 7) {
+ gs->remainder = (gs->hdr[5] << 8) | gs->hdr[6];
+ } else {
+ PORT_Assert(headerLen == 2);
+ gs->remainder = gs->dtlsPacket.len - gs->dtlsPacketOffset;
+ }
if ((gs->dtlsPacket.len - gs->dtlsPacketOffset) < gs->remainder) {
SSL_DBG(("%d: SSL3[%d]: rest of DTLS packet too short "
"to contain rest of body",
SSL_GETPID(), ss->fd));
- PR_SetError(PR_WOULD_BLOCK_ERROR, 0);
+ PORT_SetError(PR_WOULD_BLOCK_ERROR);
gs->dtlsPacketOffset = 0;
gs->dtlsPacket.len = 0;
- rv = SECFailure;
- return rv;
+ return -1;
}
/* OK, we have at least one complete packet, copy into inbuf */
- if (gs->remainder > gs->inbuf.space) {
- err = sslBuffer_Grow(&gs->inbuf, gs->remainder);
- if (err) { /* realloc has set error code to no mem. */
- return err;
- }
+ gs->inbuf.len = 0;
+ rv = sslBuffer_Append(&gs->inbuf,
+ SSL_BUFFER_BASE(&gs->dtlsPacket) + gs->dtlsPacketOffset,
+ gs->remainder);
+ if (rv != SECSuccess) {
+ return -1; /* code already set. */
}
-
- SSL_TRC(20, ("%d: SSL3[%d]: dtls gathered record type=%d len=%d",
- SSL_GETPID(), ss->fd, gs->hdr[0], gs->inbuf.len));
-
- memcpy(gs->inbuf.buf, gs->dtlsPacket.buf + gs->dtlsPacketOffset,
- gs->remainder);
- gs->inbuf.len = gs->remainder;
gs->offset = gs->remainder;
gs->dtlsPacketOffset += gs->remainder;
gs->state = GS_INIT;
+ SSL_TRC(20, ("%d: SSL3[%d]: dtls gathered record type=%d len=%d",
+ SSL_GETPID(), ss->fd, contentType, gs->inbuf.len));
return 1;
}
@@ -442,7 +460,11 @@ ssl3_GatherCompleteHandshake(sslSocket *ss, int flags)
* We need to process it now before we overwrite it with the next
* handshake record.
*/
- rv = ssl3_HandleRecord(ss, NULL, &ss->gs.buf);
+ SSL_DBG(("%d: SSL3[%d]: resuming handshake",
+ SSL_GETPID(), ss->fd));
+ PORT_Assert(!IS_DTLS(ss));
+ rv = ssl3_HandleNonApplicationData(ss, content_handshake,
+ 0, 0, &ss->gs.buf);
} else {
/* State for SSLv2 client hello support. */
ssl2Gather ssl2gs = { PR_FALSE, 0 };
@@ -495,20 +517,14 @@ ssl3_GatherCompleteHandshake(sslSocket *ss, int flags)
* If it's application data, ss->gs.buf will not be empty upon return.
* If it's a change cipher spec, alert, or handshake message,
* ss->gs.buf.len will be 0 when ssl3_HandleRecord returns SECSuccess.
+ *
+ * cText only needs to be valid for this next function call, so
+ * it can borrow gs.hdr.
*/
- cText.type = (SSL3ContentType)ss->gs.hdr[0];
- cText.version = (ss->gs.hdr[1] << 8) | ss->gs.hdr[2];
-
- if (IS_DTLS(ss)) {
- sslSequenceNumber seq_num;
-
- /* DTLS sequence number */
- PORT_Memcpy(&seq_num, &ss->gs.hdr[3], sizeof(seq_num));
- cText.seq_num = PR_ntohll(seq_num);
- }
-
+ cText.hdr = ss->gs.hdr;
+ cText.hdrLen = ss->gs.hdrLen;
cText.buf = &ss->gs.inbuf;
- rv = ssl3_HandleRecord(ss, &cText, &ss->gs.buf);
+ rv = ssl3_HandleRecord(ss, &cText);
}
}
if (rv < 0) {
@@ -520,7 +536,6 @@ ssl3_GatherCompleteHandshake(sslSocket *ss, int flags)
* completing any renegotiation handshake we may be doing.
*/
PORT_Assert(ss->firstHsDone);
- PORT_Assert(cText.type == content_application_data);
break;
}
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