-/* ssl/record/ssl3_record.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
+#include <assert.h>
#include "../ssl_locl.h"
#include "internal/constant_time_locl.h"
#include <openssl/rand.h>
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c
};
-void SSL3_RECORD_clear(SSL3_RECORD *r)
+/*
+ * Clear the contents of an SSL3_RECORD but retain any memory allocated
+ */
+void SSL3_RECORD_clear(SSL3_RECORD *r, size_t num_recs)
{
- memset(r->seq_num, 0, sizeof(r->seq_num));
+ unsigned char *comp;
+ size_t i;
+
+ for (i = 0; i < num_recs; i++) {
+ comp = r[i].comp;
+
+ memset(&r[i], 0, sizeof(*r));
+ r[i].comp = comp;
+ }
}
-void SSL3_RECORD_release(SSL3_RECORD *r)
+void SSL3_RECORD_release(SSL3_RECORD *r, size_t num_recs)
{
- OPENSSL_free(r->comp);
- r->comp = NULL;
+ size_t i;
+
+ for (i = 0; i < num_recs; i++) {
+ OPENSSL_free(r[i].comp);
+ r[i].comp = NULL;
+ }
}
-int SSL3_RECORD_setup(SSL3_RECORD *r)
+void SSL3_RECORD_set_seq_num(SSL3_RECORD *r, const unsigned char *seq_num)
{
- if (r->comp == NULL)
- r->comp = (unsigned char *)
- OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
- if (r->comp == NULL)
+ memcpy(r->seq_num, seq_num, SEQ_NUM_SIZE);
+}
+
+/*
+ * Peeks ahead into "read_ahead" data to see if we have a whole record waiting
+ * for us in the buffer.
+ */
+static int ssl3_record_app_data_waiting(SSL *s)
+{
+ SSL3_BUFFER *rbuf;
+ size_t left, len;
+ unsigned char *p;
+
+ rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
+
+ p = SSL3_BUFFER_get_buf(rbuf);
+ if (p == NULL)
+ return 0;
+
+ left = SSL3_BUFFER_get_left(rbuf);
+
+ if (left < SSL3_RT_HEADER_LENGTH)
+ return 0;
+
+ p += SSL3_BUFFER_get_offset(rbuf);
+
+ /*
+ * We only check the type and record length, we will sanity check version
+ * etc later
+ */
+ if (*p != SSL3_RT_APPLICATION_DATA)
+ return 0;
+
+ p += 3;
+ n2s(p, len);
+
+ if (left < SSL3_RT_HEADER_LENGTH + len)
return 0;
+
return 1;
}
-void SSL3_RECORD_set_seq_num(SSL3_RECORD *r, const unsigned char *seq_num)
+int early_data_count_ok(SSL *s, size_t length, size_t overhead, int *al)
{
- memcpy(r->seq_num, seq_num, SEQ_NUM_SIZE);
+ uint32_t max_early_data = s->max_early_data;
+
+ /*
+ * If we are a client then we always use the max_early_data from the
+ * session. Otherwise we go with the lowest out of the max early data set in
+ * the session and the configured max_early_data.
+ */
+ if (!s->server || (s->hit
+ && s->session->ext.max_early_data < s->max_early_data))
+ max_early_data = s->session->ext.max_early_data;
+
+ if (max_early_data == 0) {
+ if (al != NULL)
+ *al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_EARLY_DATA_COUNT_OK, SSL_R_TOO_MUCH_EARLY_DATA);
+ return 0;
+ }
+
+ /* If we are dealing with ciphertext we need to allow for the overhead */
+ max_early_data += overhead;
+
+ if (s->early_data_count + length > max_early_data) {
+ if (al != NULL)
+ *al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_EARLY_DATA_COUNT_OK, SSL_R_TOO_MUCH_EARLY_DATA);
+ return 0;
+ }
+ s->early_data_count += length;
+
+ return 1;
}
/*
#define SSL2_RT_HEADER_LENGTH 2
/*-
- * Call this to get a new input record.
+ * Call this to get new input records.
* It will return <= 0 if more data is needed, normally due to an error
* or non-blocking IO.
- * When it finishes, one packet has been decoded and can be found in
- * ssl->s3->rrec.type - is the type of record
- * ssl->s3->rrec.data, - data
- * ssl->s3->rrec.length, - number of bytes
+ * When it finishes, |numrpipes| records have been decoded. For each record 'i':
+ * rr[i].type - is the type of record
+ * rr[i].data, - data
+ * rr[i].length, - number of bytes
+ * Multiple records will only be returned if the record types are all
+ * SSL3_RT_APPLICATION_DATA. The number of records returned will always be <=
+ * |max_pipelines|
*/
/* used only by ssl3_read_bytes */
int ssl3_get_record(SSL *s)
{
- int ssl_major, ssl_minor, al;
- int enc_err, n, i, ret = -1;
- SSL3_RECORD *rr;
+ int al;
+ int enc_err, rret, ret = -1;
+ int i;
+ size_t more, n;
+ SSL3_RECORD *rr, *thisrr;
+ SSL3_BUFFER *rbuf;
SSL_SESSION *sess;
unsigned char *p;
unsigned char md[EVP_MAX_MD_SIZE];
- short version;
- unsigned mac_size;
- size_t extra;
- unsigned empty_record_count = 0;
+ unsigned int version;
+ size_t mac_size;
+ int imac_size;
+ size_t num_recs = 0, max_recs, j;
+ PACKET pkt, sslv2pkt;
+ size_t first_rec_len;
rr = RECORD_LAYER_get_rrec(&s->rlayer);
+ rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
+ max_recs = s->max_pipelines;
+ if (max_recs == 0)
+ max_recs = 1;
sess = s->session;
- if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
- extra = SSL3_RT_MAX_EXTRA;
- else
- extra = 0;
- if (extra && !s->s3->init_extra) {
- /*
- * An application error: SLS_OP_MICROSOFT_BIG_SSLV3_BUFFER set after
- * ssl3_setup_buffers() was done
- */
- SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);
- return -1;
- }
-
- again:
- /* check if we have the header */
- if ((RECORD_LAYER_get_rstate(&s->rlayer) != SSL_ST_READ_BODY) ||
- (RECORD_LAYER_get_packet_length(&s->rlayer) < SSL3_RT_HEADER_LENGTH)) {
- n = ssl3_read_n(s, SSL3_RT_HEADER_LENGTH,
- SSL3_BUFFER_get_len(&s->rlayer.rbuf), 0);
- if (n <= 0)
- return (n); /* error or non-blocking */
- RECORD_LAYER_set_rstate(&s->rlayer, SSL_ST_READ_BODY);
-
- p = RECORD_LAYER_get_packet(&s->rlayer);
-
- /*
- * Check whether this is a regular record or an SSLv2 style record. The
- * latter is only used in an initial ClientHello for old clients.
- */
- if (s->first_packet && s->server && !s->read_hash && !s->enc_read_ctx
- && (p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) {
- /* SSLv2 style record */
- if (s->msg_callback)
- s->msg_callback(0, SSL2_VERSION, 0, p + 2,
- RECORD_LAYER_get_packet_length(&s->rlayer) - 2,
- s, s->msg_callback_arg);
-
- rr->type = SSL3_RT_HANDSHAKE;
- rr->rec_version = SSL2_VERSION;
-
- rr->length = ((p[0] & 0x7f) << 8) | p[1];
-
- if (rr->length > SSL3_BUFFER_get_len(&s->rlayer.rbuf)
- - SSL2_RT_HEADER_LENGTH) {
- al = SSL_AD_RECORD_OVERFLOW;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_PACKET_LENGTH_TOO_LONG);
+ do {
+ thisrr = &rr[num_recs];
+
+ /* check if we have the header */
+ if ((RECORD_LAYER_get_rstate(&s->rlayer) != SSL_ST_READ_BODY) ||
+ (RECORD_LAYER_get_packet_length(&s->rlayer)
+ < SSL3_RT_HEADER_LENGTH)) {
+ size_t sslv2len;
+ unsigned int type;
+
+ rret = ssl3_read_n(s, SSL3_RT_HEADER_LENGTH,
+ SSL3_BUFFER_get_len(rbuf), 0,
+ num_recs == 0 ? 1 : 0, &n);
+ if (rret <= 0)
+ return rret; /* error or non-blocking */
+ RECORD_LAYER_set_rstate(&s->rlayer, SSL_ST_READ_BODY);
+
+ p = RECORD_LAYER_get_packet(&s->rlayer);
+ if (!PACKET_buf_init(&pkt, RECORD_LAYER_get_packet(&s->rlayer),
+ RECORD_LAYER_get_packet_length(&s->rlayer))) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);
goto f_err;
}
-
- if (rr->length < MIN_SSL2_RECORD_LEN) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);
+ sslv2pkt = pkt;
+ if (!PACKET_get_net_2_len(&sslv2pkt, &sslv2len)
+ || !PACKET_get_1(&sslv2pkt, &type)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);
goto f_err;
}
- } else {
- /* SSLv3+ style record */
- if (s->msg_callback)
- s->msg_callback(0, 0, SSL3_RT_HEADER, p, 5, s,
- s->msg_callback_arg);
-
- /* Pull apart the header into the SSL3_RECORD */
- rr->type = *(p++);
- ssl_major = *(p++);
- ssl_minor = *(p++);
- version = (ssl_major << 8) | ssl_minor;
- rr->rec_version = version;
- n2s(p, rr->length);
-
- /* Lets check version */
- if (!s->first_packet) {
- if (version != s->version
- && s->method->version != TLS_ANY_VERSION) {
+ /*
+ * The first record received by the server may be a V2ClientHello.
+ */
+ if (s->server && RECORD_LAYER_is_first_record(&s->rlayer)
+ && (sslv2len & 0x8000) != 0
+ && (type == SSL2_MT_CLIENT_HELLO)) {
+ /*
+ * SSLv2 style record
+ *
+ * |num_recs| here will actually always be 0 because
+ * |num_recs > 0| only ever occurs when we are processing
+ * multiple app data records - which we know isn't the case here
+ * because it is an SSLv2ClientHello. We keep it using
+ * |num_recs| for the sake of consistency
+ */
+ thisrr->type = SSL3_RT_HANDSHAKE;
+ thisrr->rec_version = SSL2_VERSION;
+
+ thisrr->length = sslv2len & 0x7fff;
+
+ if (thisrr->length > SSL3_BUFFER_get_len(rbuf)
+ - SSL2_RT_HEADER_LENGTH) {
+ al = SSL_AD_RECORD_OVERFLOW;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_PACKET_LENGTH_TOO_LONG);
+ goto f_err;
+ }
+
+ if (thisrr->length < MIN_SSL2_RECORD_LEN) {
+ al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);
+ goto f_err;
+ }
+ } else {
+ /* SSLv3+ style record */
+ if (s->msg_callback)
+ s->msg_callback(0, 0, SSL3_RT_HEADER, p, 5, s,
+ s->msg_callback_arg);
+
+ /* Pull apart the header into the SSL3_RECORD */
+ if (!PACKET_get_1(&pkt, &type)
+ || !PACKET_get_net_2(&pkt, &version)
+ || !PACKET_get_net_2_len(&pkt, &thisrr->length)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+ thisrr->type = type;
+ thisrr->rec_version = version;
+
+ /* Lets check version. In TLSv1.3 we ignore this field */
+ if (!s->first_packet && !SSL_IS_TLS13(s)
+ && version != (unsigned int)s->version) {
SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_WRONG_VERSION_NUMBER);
if ((s->version & 0xFF00) == (version & 0xFF00)
- && !s->enc_write_ctx && !s->write_hash)
+ && !s->enc_write_ctx && !s->write_hash) {
+ if (thisrr->type == SSL3_RT_ALERT) {
+ /*
+ * The record is using an incorrect version number,
+ * but what we've got appears to be an alert. We
+ * haven't read the body yet to check whether its a
+ * fatal or not - but chances are it is. We probably
+ * shouldn't send a fatal alert back. We'll just
+ * end.
+ */
+ goto err;
+ }
/*
* Send back error using their minor version number :-)
*/
s->version = (unsigned short)version;
+ }
al = SSL_AD_PROTOCOL_VERSION;
goto f_err;
}
+
+ if ((version >> 8) != SSL3_VERSION_MAJOR) {
+ if (RECORD_LAYER_is_first_record(&s->rlayer)) {
+ /* Go back to start of packet, look at the five bytes
+ * that we have. */
+ p = RECORD_LAYER_get_packet(&s->rlayer);
+ if (strncmp((char *)p, "GET ", 4) == 0 ||
+ strncmp((char *)p, "POST ", 5) == 0 ||
+ strncmp((char *)p, "HEAD ", 5) == 0 ||
+ strncmp((char *)p, "PUT ", 4) == 0) {
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_HTTP_REQUEST);
+ goto err;
+ } else if (strncmp((char *)p, "CONNE", 5) == 0) {
+ SSLerr(SSL_F_SSL3_GET_RECORD,
+ SSL_R_HTTPS_PROXY_REQUEST);
+ goto err;
+ }
+
+ /* Doesn't look like TLS - don't send an alert */
+ SSLerr(SSL_F_SSL3_GET_RECORD,
+ SSL_R_WRONG_VERSION_NUMBER);
+ goto err;
+ } else {
+ SSLerr(SSL_F_SSL3_GET_RECORD,
+ SSL_R_WRONG_VERSION_NUMBER);
+ al = SSL_AD_PROTOCOL_VERSION;
+ goto f_err;
+ }
+ }
+
+ if (SSL_IS_TLS13(s) && s->enc_read_ctx != NULL
+ && thisrr->type != SSL3_RT_APPLICATION_DATA) {
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_RECORD_TYPE);
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ goto f_err;
+ }
+
+ if (thisrr->length >
+ SSL3_BUFFER_get_len(rbuf) - SSL3_RT_HEADER_LENGTH) {
+ al = SSL_AD_RECORD_OVERFLOW;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_PACKET_LENGTH_TOO_LONG);
+ goto f_err;
+ }
}
- if ((version >> 8) != SSL3_VERSION_MAJOR) {
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_WRONG_VERSION_NUMBER);
- goto err;
+ /* now s->rlayer.rstate == SSL_ST_READ_BODY */
+ }
+
+ if (SSL_IS_TLS13(s)) {
+ if (thisrr->length > SSL3_RT_MAX_TLS13_ENCRYPTED_LENGTH) {
+ al = SSL_AD_RECORD_OVERFLOW;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
+ goto f_err;
}
+ } else {
+ size_t len = SSL3_RT_MAX_ENCRYPTED_LENGTH;
+
+#ifndef OPENSSL_NO_COMP
+ /*
+ * If OPENSSL_NO_COMP is defined then SSL3_RT_MAX_ENCRYPTED_LENGTH
+ * does not include the compression overhead anyway.
+ */
+ if (s->expand == NULL)
+ len -= SSL3_RT_MAX_COMPRESSED_OVERHEAD;
+#endif
- if (rr->length >
- SSL3_BUFFER_get_len(&s->rlayer.rbuf)
- - SSL3_RT_HEADER_LENGTH) {
+ if (thisrr->length > len) {
al = SSL_AD_RECORD_OVERFLOW;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_PACKET_LENGTH_TOO_LONG);
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
goto f_err;
}
}
- /* now s->rlayer.rstate == SSL_ST_READ_BODY */
- }
+ /*
+ * s->rlayer.rstate == SSL_ST_READ_BODY, get and decode the data.
+ * Calculate how much more data we need to read for the rest of the
+ * record
+ */
+ if (thisrr->rec_version == SSL2_VERSION) {
+ more = thisrr->length + SSL2_RT_HEADER_LENGTH
+ - SSL3_RT_HEADER_LENGTH;
+ } else {
+ more = thisrr->length;
+ }
+ if (more > 0) {
+ /* now s->packet_length == SSL3_RT_HEADER_LENGTH */
- /*
- * s->rlayer.rstate == SSL_ST_READ_BODY, get and decode the data.
- * Calculate how much more data we need to read for the rest of the record
- */
- if (rr->rec_version == SSL2_VERSION) {
- i = rr->length + SSL2_RT_HEADER_LENGTH - SSL3_RT_HEADER_LENGTH;
- } else {
- i = rr->length;
- }
- if (i > 0) {
- /* now s->packet_length == SSL3_RT_HEADER_LENGTH */
+ rret = ssl3_read_n(s, more, more, 1, 0, &n);
+ if (rret <= 0)
+ return rret; /* error or non-blocking io */
+ }
+
+ /* set state for later operations */
+ RECORD_LAYER_set_rstate(&s->rlayer, SSL_ST_READ_HEADER);
- n = ssl3_read_n(s, i, i, 1);
- if (n <= 0)
- return (n); /* error or non-blocking io */
/*
- * now n == rr->length, and
- * s->packet_length == SSL3_RT_HEADER_LENGTH + rr->length
- * or
- * s->packet_length == SSL2_RT_HEADER_LENGTH + rr->length
- * (if SSLv2 packet)
+ * At this point, s->packet_length == SSL3_RT_HEADER_LENGTH
+ * + thisrr->length, or s->packet_length == SSL2_RT_HEADER_LENGTH
+ * + thisrr->length and we have that many bytes in s->packet
*/
- } else {
- n = 0;
- }
+ if (thisrr->rec_version == SSL2_VERSION) {
+ thisrr->input =
+ &(RECORD_LAYER_get_packet(&s->rlayer)[SSL2_RT_HEADER_LENGTH]);
+ } else {
+ thisrr->input =
+ &(RECORD_LAYER_get_packet(&s->rlayer)[SSL3_RT_HEADER_LENGTH]);
+ }
- /* set state for later operations */
- RECORD_LAYER_set_rstate(&s->rlayer, SSL_ST_READ_HEADER);
+ /*
+ * ok, we can now read from 's->packet' data into 'thisrr' thisrr->input
+ * points at thisrr->length bytes, which need to be copied into
+ * thisrr->data by either the decryption or by the decompression When
+ * the data is 'copied' into the thisrr->data buffer, thisrr->input will
+ * be pointed at the new buffer
+ */
- /*
- * At this point, s->packet_length == SSL3_RT_HEADER_LENGTH + rr->length,
- * or s->packet_length == SSL2_RT_HEADER_LENGTH + rr->length
- * and we have that many bytes in s->packet
- */
- if(rr->rec_version == SSL2_VERSION) {
- rr->input = &(RECORD_LAYER_get_packet(&s->rlayer)[SSL2_RT_HEADER_LENGTH]);
- } else {
- rr->input = &(RECORD_LAYER_get_packet(&s->rlayer)[SSL3_RT_HEADER_LENGTH]);
- }
+ /*
+ * We now have - encrypted [ MAC [ compressed [ plain ] ] ]
+ * thisrr->length bytes of encrypted compressed stuff.
+ */
- /*
- * ok, we can now read from 's->packet' data into 'rr' rr->input points
- * at rr->length bytes, which need to be copied into rr->data by either
- * the decryption or by the decompression When the data is 'copied' into
- * the rr->data buffer, rr->input will be pointed at the new buffer
- */
+ /* decrypt in place in 'thisrr->input' */
+ thisrr->data = thisrr->input;
+ thisrr->orig_len = thisrr->length;
- /*
- * We now have - encrypted [ MAC [ compressed [ plain ] ] ] rr->length
- * bytes of encrypted compressed stuff.
- */
+ /* Mark this record as not read by upper layers yet */
+ thisrr->read = 0;
- /* check is not needed I believe */
- if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH + extra) {
- al = SSL_AD_RECORD_OVERFLOW;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
- goto f_err;
- }
+ num_recs++;
+
+ /* we have pulled in a full packet so zero things */
+ RECORD_LAYER_reset_packet_length(&s->rlayer);
+ RECORD_LAYER_clear_first_record(&s->rlayer);
+ } while (num_recs < max_recs
+ && thisrr->type == SSL3_RT_APPLICATION_DATA
+ && SSL_USE_EXPLICIT_IV(s)
+ && s->enc_read_ctx != NULL
+ && (EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_read_ctx))
+ & EVP_CIPH_FLAG_PIPELINE)
+ && ssl3_record_app_data_waiting(s));
- /* decrypt in place in 'rr->input' */
- rr->data = rr->input;
- rr->orig_len = rr->length;
/*
* If in encrypt-then-mac mode calculate mac from encrypted record. All
* the details below are public so no timing details can leak.
*/
- if (SSL_USE_ETM(s) && s->read_hash) {
+ if (SSL_READ_ETM(s) && s->read_hash) {
unsigned char *mac;
- mac_size = EVP_MD_CTX_size(s->read_hash);
- OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);
- if (rr->length < mac_size) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
+ /* TODO(size_t): convert this to do size_t properly */
+ imac_size = EVP_MD_CTX_size(s->read_hash);
+ assert(imac_size >= 0 && imac_size <= EVP_MAX_MD_SIZE);
+ if (imac_size < 0 || imac_size > EVP_MAX_MD_SIZE) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_SSL3_GET_RECORD, ERR_LIB_EVP);
+ goto f_err;
}
- rr->length -= mac_size;
- mac = rr->data + rr->length;
- i = s->method->ssl3_enc->mac(s, md, 0 /* not send */ );
- if (i < 0 || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0) {
- al = SSL_AD_BAD_RECORD_MAC;
- SSLerr(SSL_F_SSL3_GET_RECORD,
- SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
- goto f_err;
+ mac_size = (size_t)imac_size;
+ for (j = 0; j < num_recs; j++) {
+ thisrr = &rr[j];
+
+ if (thisrr->length < mac_size) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);
+ goto f_err;
+ }
+ thisrr->length -= mac_size;
+ mac = thisrr->data + thisrr->length;
+ i = s->method->ssl3_enc->mac(s, thisrr, md, 0 /* not send */ );
+ if (i == 0 || CRYPTO_memcmp(md, mac, mac_size) != 0) {
+ al = SSL_AD_BAD_RECORD_MAC;
+ SSLerr(SSL_F_SSL3_GET_RECORD,
+ SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
+ goto f_err;
+ }
}
}
- enc_err = s->method->ssl3_enc->enc(s, 0);
+ first_rec_len = rr[0].length;
+
+ enc_err = s->method->ssl3_enc->enc(s, rr, num_recs, 0);
+
/*-
* enc_err is:
- * 0: (in non-constant time) if the record is publically invalid.
+ * 0: (in non-constant time) if the record is publicly invalid.
* 1: if the padding is valid
* -1: if the padding is invalid
*/
if (enc_err == 0) {
+ if (num_recs == 1 && ossl_statem_skip_early_data(s)) {
+ /*
+ * Valid early_data that we cannot decrypt might fail here as
+ * publicly invalid. We treat it like an empty record.
+ */
+
+ thisrr = &rr[0];
+
+ if (!early_data_count_ok(s, thisrr->length,
+ EARLY_DATA_CIPHERTEXT_OVERHEAD, &al))
+ goto f_err;
+
+ thisrr->length = 0;
+ thisrr->read = 1;
+ RECORD_LAYER_set_numrpipes(&s->rlayer, 1);
+ RECORD_LAYER_reset_read_sequence(&s->rlayer);
+ return 1;
+ }
al = SSL_AD_DECRYPTION_FAILED;
SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
goto f_err;
}
-#ifdef TLS_DEBUG
- printf("dec %d\n", rr->length);
+#ifdef SSL_DEBUG
+ printf("dec %"OSSLzu"\n", rr[0].length);
{
- unsigned int z;
- for (z = 0; z < rr->length; z++)
- printf("%02X%c", rr->data[z], ((z + 1) % 16) ? ' ' : '\n');
+ size_t z;
+ for (z = 0; z < rr[0].length; z++)
+ printf("%02X%c", rr[0].data[z], ((z + 1) % 16) ? ' ' : '\n');
}
printf("\n");
#endif
/* r->length is now the compressed data plus mac */
if ((sess != NULL) &&
(s->enc_read_ctx != NULL) &&
- (EVP_MD_CTX_md(s->read_hash) != NULL) && !SSL_USE_ETM(s)) {
+ (!SSL_READ_ETM(s) && EVP_MD_CTX_md(s->read_hash) != NULL)) {
/* s->read_hash != NULL => mac_size != -1 */
unsigned char *mac = NULL;
unsigned char mac_tmp[EVP_MAX_MD_SIZE];
+
mac_size = EVP_MD_CTX_size(s->read_hash);
OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);
- /*
- * orig_len is the length of the record before any padding was
- * removed. This is public information, as is the MAC in use,
- * therefore we can safely process the record in a different amount
- * of time if it's too short to possibly contain a MAC.
- */
- if (rr->orig_len < mac_size ||
- /* CBC records must have a padding length byte too. */
- (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
- rr->orig_len < mac_size + 1)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
+ for (j = 0; j < num_recs; j++) {
+ thisrr = &rr[j];
+ /*
+ * orig_len is the length of the record before any padding was
+ * removed. This is public information, as is the MAC in use,
+ * therefore we can safely process the record in a different amount
+ * of time if it's too short to possibly contain a MAC.
+ */
+ if (thisrr->orig_len < mac_size ||
+ /* CBC records must have a padding length byte too. */
+ (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
+ thisrr->orig_len < mac_size + 1)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);
+ goto f_err;
+ }
+
+ if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE) {
+ /*
+ * We update the length so that the TLS header bytes can be
+ * constructed correctly but we need to extract the MAC in
+ * constant time from within the record, without leaking the
+ * contents of the padding bytes.
+ */
+ mac = mac_tmp;
+ ssl3_cbc_copy_mac(mac_tmp, thisrr, mac_size);
+ thisrr->length -= mac_size;
+ } else {
+ /*
+ * In this case there's no padding, so |rec->orig_len| equals
+ * |rec->length| and we checked that there's enough bytes for
+ * |mac_size| above.
+ */
+ thisrr->length -= mac_size;
+ mac = &thisrr->data[thisrr->length];
+ }
+
+ i = s->method->ssl3_enc->mac(s, thisrr, md, 0 /* not send */ );
+ if (i == 0 || mac == NULL
+ || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0)
+ enc_err = -1;
+ if (thisrr->length > SSL3_RT_MAX_COMPRESSED_LENGTH + mac_size)
+ enc_err = -1;
}
+ }
- if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE) {
+ if (enc_err < 0) {
+ if (num_recs == 1 && ossl_statem_skip_early_data(s)) {
/*
- * We update the length so that the TLS header bytes can be
- * constructed correctly but we need to extract the MAC in
- * constant time from within the record, without leaking the
- * contents of the padding bytes.
+ * We assume this is unreadable early_data - we treat it like an
+ * empty record
*/
- mac = mac_tmp;
- ssl3_cbc_copy_mac(mac_tmp, rr, mac_size);
- rr->length -= mac_size;
- } else {
+
/*
- * In this case there's no padding, so |rec->orig_len| equals
- * |rec->length| and we checked that there's enough bytes for
- * |mac_size| above.
+ * The record length may have been modified by the mac check above
+ * so we use the previously saved value
*/
- rr->length -= mac_size;
- mac = &rr->data[rr->length];
- }
-
- i = s->method->ssl3_enc->mac(s, md, 0 /* not send */ );
- if (i < 0 || mac == NULL
- || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0)
- enc_err = -1;
- if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH + extra + mac_size)
- enc_err = -1;
- }
+ if (!early_data_count_ok(s, first_rec_len,
+ EARLY_DATA_CIPHERTEXT_OVERHEAD, &al))
+ goto f_err;
- if (enc_err < 0) {
+ thisrr = &rr[0];
+ thisrr->length = 0;
+ thisrr->read = 1;
+ RECORD_LAYER_set_numrpipes(&s->rlayer, 1);
+ RECORD_LAYER_reset_read_sequence(&s->rlayer);
+ return 1;
+ }
/*
* A separate 'decryption_failed' alert was introduced with TLS 1.0,
* SSL 3.0 only has 'bad_record_mac'. But unless a decryption
goto f_err;
}
- /* r->length is now just compressed */
- if (s->expand != NULL) {
- if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH + extra) {
- al = SSL_AD_RECORD_OVERFLOW;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_COMPRESSED_LENGTH_TOO_LONG);
- goto f_err;
- }
- if (!ssl3_do_uncompress(s)) {
- al = SSL_AD_DECOMPRESSION_FAILURE;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_DECOMPRESSION);
- goto f_err;
+ for (j = 0; j < num_recs; j++) {
+ thisrr = &rr[j];
+
+ /* thisrr->length is now just compressed */
+ if (s->expand != NULL) {
+ if (thisrr->length > SSL3_RT_MAX_COMPRESSED_LENGTH) {
+ al = SSL_AD_RECORD_OVERFLOW;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_COMPRESSED_LENGTH_TOO_LONG);
+ goto f_err;
+ }
+ if (!ssl3_do_uncompress(s, thisrr)) {
+ al = SSL_AD_DECOMPRESSION_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_DECOMPRESSION);
+ goto f_err;
+ }
}
- }
- if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH + extra) {
- al = SSL_AD_RECORD_OVERFLOW;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_DATA_LENGTH_TOO_LONG);
- goto f_err;
- }
+ if (SSL_IS_TLS13(s) && s->enc_read_ctx != NULL) {
+ size_t end;
- rr->off = 0;
- /*-
- * So at this point the following is true
- * ssl->s3->rrec.type is the type of record
- * ssl->s3->rrec.length == number of bytes in record
- * ssl->s3->rrec.off == offset to first valid byte
- * ssl->s3->rrec.data == where to take bytes from, increment
- * after use :-).
- */
+ if (thisrr->length == 0
+ || thisrr->type != SSL3_RT_APPLICATION_DATA) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_RECORD_TYPE);
+ goto f_err;
+ }
- /* we have pulled in a full packet so zero things */
- RECORD_LAYER_reset_packet_length(&s->rlayer);
+ /* Strip trailing padding */
+ for (end = thisrr->length - 1; end > 0 && thisrr->data[end] == 0;
+ end--)
+ continue;
+
+ thisrr->length = end;
+ thisrr->type = thisrr->data[end];
+ if (thisrr->type != SSL3_RT_APPLICATION_DATA
+ && thisrr->type != SSL3_RT_ALERT
+ && thisrr->type != SSL3_RT_HANDSHAKE) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_RECORD_TYPE);
+ goto f_err;
+ }
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, SSL3_RT_INNER_CONTENT_TYPE,
+ &thisrr->data[end], 1, s, s->msg_callback_arg);
+ }
- /* just read a 0 length packet */
- if (rr->length == 0) {
- empty_record_count++;
- if (empty_record_count > MAX_EMPTY_RECORDS) {
+ if (SSL_IS_TLS13(s)
+ && (thisrr->type == SSL3_RT_HANDSHAKE
+ || thisrr->type == SSL3_RT_ALERT)
+ && thisrr->length == 0) {
al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_RECORD_TOO_SMALL);
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_LENGTH);
goto f_err;
}
- goto again;
+
+ if (thisrr->length > SSL3_RT_MAX_PLAIN_LENGTH) {
+ al = SSL_AD_RECORD_OVERFLOW;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_DATA_LENGTH_TOO_LONG);
+ goto f_err;
+ }
+
+ thisrr->off = 0;
+ /*-
+ * So at this point the following is true
+ * thisrr->type is the type of record
+ * thisrr->length == number of bytes in record
+ * thisrr->off == offset to first valid byte
+ * thisrr->data == where to take bytes from, increment after use :-).
+ */
+
+ /* just read a 0 length packet */
+ if (thisrr->length == 0) {
+ RECORD_LAYER_inc_empty_record_count(&s->rlayer);
+ if (RECORD_LAYER_get_empty_record_count(&s->rlayer)
+ > MAX_EMPTY_RECORDS) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_RECORD_TOO_SMALL);
+ goto f_err;
+ }
+ } else {
+ RECORD_LAYER_reset_empty_record_count(&s->rlayer);
+ }
}
- return (1);
+ if (s->early_data_state == SSL_EARLY_DATA_READING) {
+ thisrr = &rr[0];
+ if (thisrr->type == SSL3_RT_APPLICATION_DATA
+ && !early_data_count_ok(s, thisrr->length, 0, &al))
+ goto f_err;
+ }
+
+ RECORD_LAYER_set_numrpipes(&s->rlayer, num_recs);
+ return 1;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
err:
- return (ret);
+ return ret;
}
-int ssl3_do_uncompress(SSL *ssl)
+int ssl3_do_uncompress(SSL *ssl, SSL3_RECORD *rr)
{
#ifndef OPENSSL_NO_COMP
int i;
- SSL3_RECORD *rr;
- rr = RECORD_LAYER_get_rrec(&ssl->rlayer);
+ if (rr->comp == NULL) {
+ rr->comp = (unsigned char *)
+ OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
+ }
+ if (rr->comp == NULL)
+ return 0;
+
+ /* TODO(size_t): Convert this call */
i = COMP_expand_block(ssl->expand, rr->comp,
- SSL3_RT_MAX_PLAIN_LENGTH, rr->data,
- (int)rr->length);
+ SSL3_RT_MAX_PLAIN_LENGTH, rr->data, (int)rr->length);
if (i < 0)
- return (0);
+ return 0;
else
rr->length = i;
rr->data = rr->comp;
#endif
- return (1);
+ return 1;
}
-int ssl3_do_compress(SSL *ssl)
+int ssl3_do_compress(SSL *ssl, SSL3_RECORD *wr)
{
#ifndef OPENSSL_NO_COMP
int i;
- SSL3_RECORD *wr;
- wr = RECORD_LAYER_get_wrec(&ssl->rlayer);
+ /* TODO(size_t): Convert this call */
i = COMP_compress_block(ssl->compress, wr->data,
- SSL3_RT_MAX_COMPRESSED_LENGTH,
+ (int)(wr->length + SSL3_RT_MAX_COMPRESSED_OVERHEAD),
wr->input, (int)wr->length);
if (i < 0)
return (0);
}
/*-
- * ssl3_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
+ * ssl3_enc encrypts/decrypts |n_recs| records in |inrecs|
*
* Returns:
* 0: (in non-constant time) if the record is publically invalid (i.e. too
* -1: if the record's padding is invalid or, if sending, an internal error
* occurred.
*/
-int ssl3_enc(SSL *s, int send)
+int ssl3_enc(SSL *s, SSL3_RECORD *inrecs, size_t n_recs, int sending)
{
SSL3_RECORD *rec;
EVP_CIPHER_CTX *ds;
- unsigned long l;
- int bs, i, mac_size = 0;
+ size_t l, i;
+ size_t bs, mac_size = 0;
+ int imac_size;
const EVP_CIPHER *enc;
- if (send) {
+ rec = inrecs;
+ /*
+ * We shouldn't ever be called with more than one record in the SSLv3 case
+ */
+ if (n_recs != 1)
+ return 0;
+ if (sending) {
ds = s->enc_write_ctx;
- rec = RECORD_LAYER_get_wrec(&s->rlayer);
if (s->enc_write_ctx == NULL)
enc = NULL;
else
enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
} else {
ds = s->enc_read_ctx;
- rec = RECORD_LAYER_get_rrec(&s->rlayer);
if (s->enc_read_ctx == NULL)
enc = NULL;
else
rec->input = rec->data;
} else {
l = rec->length;
- bs = EVP_CIPHER_block_size(ds->cipher);
+ /* TODO(size_t): Convert this call */
+ bs = EVP_CIPHER_CTX_block_size(ds);
/* COMPRESS */
- if ((bs != 1) && send) {
- i = bs - ((int)l % bs);
+ if ((bs != 1) && sending) {
+ i = bs - (l % bs);
/* we need to add 'i-1' padding bytes */
l += i;
*/
memset(&rec->input[rec->length], 0, i);
rec->length += i;
- rec->input[l - 1] = (i - 1);
+ rec->input[l - 1] = (unsigned char)(i - 1);
}
- if (!send) {
+ if (!sending) {
if (l == 0 || l % bs != 0)
return 0;
/* otherwise, rec->length >= bs */
}
- if (EVP_Cipher(ds, rec->data, rec->input, l) < 1)
+ /* TODO(size_t): Convert this call */
+ if (EVP_Cipher(ds, rec->data, rec->input, (unsigned int)l) < 1)
return -1;
- if (EVP_MD_CTX_md(s->read_hash) != NULL)
- mac_size = EVP_MD_CTX_size(s->read_hash);
- if ((bs != 1) && !send)
- return ssl3_cbc_remove_padding(s, rec, bs, mac_size);
+ if (EVP_MD_CTX_md(s->read_hash) != NULL) {
+ /* TODO(size_t): convert me */
+ imac_size = EVP_MD_CTX_size(s->read_hash);
+ if (imac_size < 0)
+ return -1;
+ mac_size = (size_t)imac_size;
+ }
+ if ((bs != 1) && !sending)
+ return ssl3_cbc_remove_padding(rec, bs, mac_size);
}
return (1);
}
+#define MAX_PADDING 256
/*-
- * tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
+ * tls1_enc encrypts/decrypts |n_recs| in |recs|.
*
* Returns:
* 0: (in non-constant time) if the record is publically invalid (i.e. too
* -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
* an internal error occurred.
*/
-int tls1_enc(SSL *s, int send)
+int tls1_enc(SSL *s, SSL3_RECORD *recs, size_t n_recs, int sending)
{
- SSL3_RECORD *rec;
EVP_CIPHER_CTX *ds;
- unsigned long l;
- int bs, i, j, k, pad = 0, ret, mac_size = 0;
+ size_t reclen[SSL_MAX_PIPELINES];
+ unsigned char buf[SSL_MAX_PIPELINES][EVP_AEAD_TLS1_AAD_LEN];
+ int i, pad = 0, ret, tmpr;
+ size_t bs, mac_size = 0, ctr, padnum, loop;
+ unsigned char padval;
+ int imac_size;
const EVP_CIPHER *enc;
- if (send) {
+ if (n_recs == 0)
+ return 0;
+
+ if (sending) {
if (EVP_MD_CTX_md(s->write_hash)) {
int n = EVP_MD_CTX_size(s->write_hash);
OPENSSL_assert(n >= 0);
}
ds = s->enc_write_ctx;
- rec = RECORD_LAYER_get_wrec(&s->rlayer);
if (s->enc_write_ctx == NULL)
enc = NULL;
else {
else
ivlen = 0;
if (ivlen > 1) {
- if (rec->data != rec->input)
- /*
- * we can't write into the input stream: Can this ever
- * happen?? (steve)
- */
- fprintf(stderr,
- "%s:%d: rec->data != rec->input\n",
- __FILE__, __LINE__);
- else if (RAND_bytes(rec->input, ivlen) <= 0)
- return -1;
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ if (recs[ctr].data != recs[ctr].input) {
+ /*
+ * we can't write into the input stream: Can this ever
+ * happen?? (steve)
+ */
+ SSLerr(SSL_F_TLS1_ENC, ERR_R_INTERNAL_ERROR);
+ return -1;
+ } else if (RAND_bytes(recs[ctr].input, ivlen) <= 0) {
+ SSLerr(SSL_F_TLS1_ENC, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ }
}
}
} else {
OPENSSL_assert(n >= 0);
}
ds = s->enc_read_ctx;
- rec = RECORD_LAYER_get_rrec(&s->rlayer);
if (s->enc_read_ctx == NULL)
enc = NULL;
else
}
if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
- memmove(rec->data, rec->input, rec->length);
- rec->input = rec->data;
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ memmove(recs[ctr].data, recs[ctr].input, recs[ctr].length);
+ recs[ctr].input = recs[ctr].data;
+ }
ret = 1;
} else {
- l = rec->length;
- bs = EVP_CIPHER_block_size(ds->cipher);
+ bs = EVP_CIPHER_block_size(EVP_CIPHER_CTX_cipher(ds));
+
+ if (n_recs > 1) {
+ if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ds))
+ & EVP_CIPH_FLAG_PIPELINE)) {
+ /*
+ * We shouldn't have been called with pipeline data if the
+ * cipher doesn't support pipelining
+ */
+ SSLerr(SSL_F_TLS1_ENC, SSL_R_PIPELINE_FAILURE);
+ return -1;
+ }
+ }
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ reclen[ctr] = recs[ctr].length;
+
+ if (EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ds))
+ & EVP_CIPH_FLAG_AEAD_CIPHER) {
+ unsigned char *seq;
+
+ seq = sending ? RECORD_LAYER_get_write_sequence(&s->rlayer)
+ : RECORD_LAYER_get_read_sequence(&s->rlayer);
+
+ if (SSL_IS_DTLS(s)) {
+ /* DTLS does not support pipelining */
+ unsigned char dtlsseq[9], *p = dtlsseq;
+
+ s2n(sending ? DTLS_RECORD_LAYER_get_w_epoch(&s->rlayer) :
+ DTLS_RECORD_LAYER_get_r_epoch(&s->rlayer), p);
+ memcpy(p, &seq[2], 6);
+ memcpy(buf[ctr], dtlsseq, 8);
+ } else {
+ memcpy(buf[ctr], seq, 8);
+ for (i = 7; i >= 0; i--) { /* increment */
+ ++seq[i];
+ if (seq[i] != 0)
+ break;
+ }
+ }
- if (EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
- unsigned char buf[EVP_AEAD_TLS1_AAD_LEN], *seq;
+ buf[ctr][8] = recs[ctr].type;
+ buf[ctr][9] = (unsigned char)(s->version >> 8);
+ buf[ctr][10] = (unsigned char)(s->version);
+ buf[ctr][11] = (unsigned char)(recs[ctr].length >> 8);
+ buf[ctr][12] = (unsigned char)(recs[ctr].length & 0xff);
+ pad = EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_AEAD_TLS1_AAD,
+ EVP_AEAD_TLS1_AAD_LEN, buf[ctr]);
+ if (pad <= 0)
+ return -1;
- seq = send ? RECORD_LAYER_get_write_sequence(&s->rlayer)
- : RECORD_LAYER_get_read_sequence(&s->rlayer);
+ if (sending) {
+ reclen[ctr] += pad;
+ recs[ctr].length += pad;
+ }
- if (SSL_IS_DTLS(s)) {
- unsigned char dtlsseq[9], *p = dtlsseq;
+ } else if ((bs != 1) && sending) {
+ padnum = bs - (reclen[ctr] % bs);
- s2n(send ? DTLS_RECORD_LAYER_get_w_epoch(&s->rlayer) :
- DTLS_RECORD_LAYER_get_r_epoch(&s->rlayer), p);
- memcpy(p, &seq[2], 6);
- memcpy(buf, dtlsseq, 8);
- } else {
- memcpy(buf, seq, 8);
- for (i = 7; i >= 0; i--) { /* increment */
- ++seq[i];
- if (seq[i] != 0)
- break;
- }
- }
+ /* Add weird padding of upto 256 bytes */
- buf[8] = rec->type;
- buf[9] = (unsigned char)(s->version >> 8);
- buf[10] = (unsigned char)(s->version);
- buf[11] = rec->length >> 8;
- buf[12] = rec->length & 0xff;
- pad = EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_AEAD_TLS1_AAD,
- EVP_AEAD_TLS1_AAD_LEN, buf);
- if (pad <= 0)
- return -1;
- if (send) {
- l += pad;
- rec->length += pad;
+ if (padnum > MAX_PADDING)
+ return -1;
+ /* we need to add 'padnum' padding bytes of value padval */
+ padval = (unsigned char)(padnum - 1);
+ for (loop = reclen[ctr]; loop < reclen[ctr] + padnum; loop++)
+ recs[ctr].input[loop] = padval;
+ reclen[ctr] += padnum;
+ recs[ctr].length += padnum;
}
- } else if ((bs != 1) && send) {
- i = bs - ((int)l % bs);
-
- /* Add weird padding of upto 256 bytes */
- /* we need to add 'i' padding bytes of value j */
- j = i - 1;
- if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) {
- if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
- j++;
+ if (!sending) {
+ if (reclen[ctr] == 0 || reclen[ctr] % bs != 0)
+ return 0;
}
- for (k = (int)l; k < (int)(l + i); k++)
- rec->input[k] = j;
- l += i;
- rec->length += i;
}
+ if (n_recs > 1) {
+ unsigned char *data[SSL_MAX_PIPELINES];
- if (!send) {
- if (l == 0 || l % bs != 0)
- return 0;
+ /* Set the output buffers */
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ data[ctr] = recs[ctr].data;
+ }
+ if (EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS,
+ (int)n_recs, data) <= 0) {
+ SSLerr(SSL_F_TLS1_ENC, SSL_R_PIPELINE_FAILURE);
+ }
+ /* Set the input buffers */
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ data[ctr] = recs[ctr].input;
+ }
+ if (EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_SET_PIPELINE_INPUT_BUFS,
+ (int)n_recs, data) <= 0
+ || EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_SET_PIPELINE_INPUT_LENS,
+ (int)n_recs, reclen) <= 0) {
+ SSLerr(SSL_F_TLS1_ENC, SSL_R_PIPELINE_FAILURE);
+ return -1;
+ }
}
- i = EVP_Cipher(ds, rec->data, rec->input, l);
- if ((EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_CUSTOM_CIPHER)
- ? (i < 0)
- : (i == 0))
+ /* TODO(size_t): Convert this call */
+ tmpr = EVP_Cipher(ds, recs[0].data, recs[0].input,
+ (unsigned int)reclen[0]);
+ if ((EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ds))
+ & EVP_CIPH_FLAG_CUSTOM_CIPHER)
+ ? (tmpr < 0)
+ : (tmpr == 0))
return -1; /* AEAD can fail to verify MAC */
- if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) {
- rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
- rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
- rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
+ if (sending == 0) {
+ if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE) {
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ recs[ctr].data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
+ recs[ctr].input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
+ recs[ctr].length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
+ }
+ } else if (EVP_CIPHER_mode(enc) == EVP_CIPH_CCM_MODE) {
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ recs[ctr].data += EVP_CCM_TLS_EXPLICIT_IV_LEN;
+ recs[ctr].input += EVP_CCM_TLS_EXPLICIT_IV_LEN;
+ recs[ctr].length -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
+ }
+ }
}
ret = 1;
- if (!SSL_USE_ETM(s) && EVP_MD_CTX_md(s->read_hash) != NULL)
- mac_size = EVP_MD_CTX_size(s->read_hash);
- if ((bs != 1) && !send)
- ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
- if (pad && !send)
- rec->length -= pad;
+ if (!SSL_READ_ETM(s) && EVP_MD_CTX_md(s->read_hash) != NULL) {
+ imac_size = EVP_MD_CTX_size(s->read_hash);
+ if (imac_size < 0)
+ return -1;
+ mac_size = (size_t)imac_size;
+ }
+ if ((bs != 1) && !sending) {
+ int tmpret;
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ tmpret = tls1_cbc_remove_padding(s, &recs[ctr], bs, mac_size);
+ /*
+ * If tmpret == 0 then this means publicly invalid so we can
+ * short circuit things here. Otherwise we must respect constant
+ * time behaviour.
+ */
+ if (tmpret == 0)
+ return 0;
+ ret = constant_time_select_int(constant_time_eq_int(tmpret, 1),
+ ret, -1);
+ }
+ }
+ if (pad && !sending) {
+ for (ctr = 0; ctr < n_recs; ctr++) {
+ recs[ctr].length -= pad;
+ }
+ }
}
return ret;
}
-int n_ssl3_mac(SSL *ssl, unsigned char *md, int send)
+int n_ssl3_mac(SSL *ssl, SSL3_RECORD *rec, unsigned char *md, int sending)
{
- SSL3_RECORD *rec;
unsigned char *mac_sec, *seq;
- EVP_MD_CTX md_ctx;
const EVP_MD_CTX *hash;
unsigned char *p, rec_char;
size_t md_size;
- int npad;
+ size_t npad;
int t;
- if (send) {
- rec = RECORD_LAYER_get_wrec(&ssl->rlayer);
+ if (sending) {
mac_sec = &(ssl->s3->write_mac_secret[0]);
seq = RECORD_LAYER_get_write_sequence(&ssl->rlayer);
hash = ssl->write_hash;
} else {
- rec = RECORD_LAYER_get_rrec(&ssl->rlayer);
mac_sec = &(ssl->s3->read_mac_secret[0]);
seq = RECORD_LAYER_get_read_sequence(&ssl->rlayer);
hash = ssl->read_hash;
t = EVP_MD_CTX_size(hash);
if (t < 0)
- return -1;
+ return 0;
md_size = t;
npad = (48 / md_size) * md_size;
- if (!send &&
+ if (!sending &&
EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
ssl3_cbc_record_digest_supported(hash)) {
/*
* total size.
*/
unsigned char header[75];
- unsigned j = 0;
+ size_t j = 0;
memcpy(header + j, mac_sec, md_size);
j += md_size;
memcpy(header + j, ssl3_pad_1, npad);
memcpy(header + j, seq, 8);
j += 8;
header[j++] = rec->type;
- header[j++] = rec->length >> 8;
- header[j++] = rec->length & 0xff;
+ header[j++] = (unsigned char)(rec->length >> 8);
+ header[j++] = (unsigned char)(rec->length & 0xff);
/* Final param == is SSLv3 */
- ssl3_cbc_digest_record(hash,
- md, &md_size,
- header, rec->input,
- rec->length + md_size, rec->orig_len,
- mac_sec, md_size, 1);
+ if (ssl3_cbc_digest_record(hash,
+ md, &md_size,
+ header, rec->input,
+ rec->length + md_size, rec->orig_len,
+ mac_sec, md_size, 1) <= 0)
+ return 0;
} else {
unsigned int md_size_u;
/* Chop the digest off the end :-) */
- EVP_MD_CTX_init(&md_ctx);
+ EVP_MD_CTX *md_ctx = EVP_MD_CTX_new();
+
+ if (md_ctx == NULL)
+ return 0;
- EVP_MD_CTX_copy_ex(&md_ctx, hash);
- EVP_DigestUpdate(&md_ctx, mac_sec, md_size);
- EVP_DigestUpdate(&md_ctx, ssl3_pad_1, npad);
- EVP_DigestUpdate(&md_ctx, seq, 8);
rec_char = rec->type;
- EVP_DigestUpdate(&md_ctx, &rec_char, 1);
p = md;
s2n(rec->length, p);
- EVP_DigestUpdate(&md_ctx, md, 2);
- EVP_DigestUpdate(&md_ctx, rec->input, rec->length);
- EVP_DigestFinal_ex(&md_ctx, md, NULL);
-
- EVP_MD_CTX_copy_ex(&md_ctx, hash);
- EVP_DigestUpdate(&md_ctx, mac_sec, md_size);
- EVP_DigestUpdate(&md_ctx, ssl3_pad_2, npad);
- EVP_DigestUpdate(&md_ctx, md, md_size);
- EVP_DigestFinal_ex(&md_ctx, md, &md_size_u);
- md_size = md_size_u;
-
- EVP_MD_CTX_cleanup(&md_ctx);
+ if (EVP_MD_CTX_copy_ex(md_ctx, hash) <= 0
+ || EVP_DigestUpdate(md_ctx, mac_sec, md_size) <= 0
+ || EVP_DigestUpdate(md_ctx, ssl3_pad_1, npad) <= 0
+ || EVP_DigestUpdate(md_ctx, seq, 8) <= 0
+ || EVP_DigestUpdate(md_ctx, &rec_char, 1) <= 0
+ || EVP_DigestUpdate(md_ctx, md, 2) <= 0
+ || EVP_DigestUpdate(md_ctx, rec->input, rec->length) <= 0
+ || EVP_DigestFinal_ex(md_ctx, md, NULL) <= 0
+ || EVP_MD_CTX_copy_ex(md_ctx, hash) <= 0
+ || EVP_DigestUpdate(md_ctx, mac_sec, md_size) <= 0
+ || EVP_DigestUpdate(md_ctx, ssl3_pad_2, npad) <= 0
+ || EVP_DigestUpdate(md_ctx, md, md_size) <= 0
+ || EVP_DigestFinal_ex(md_ctx, md, &md_size_u) <= 0) {
+ EVP_MD_CTX_reset(md_ctx);
+ return 0;
+ }
+
+ EVP_MD_CTX_free(md_ctx);
}
ssl3_record_sequence_update(seq);
- return (md_size);
+ return 1;
}
-int tls1_mac(SSL *ssl, unsigned char *md, int send)
+int tls1_mac(SSL *ssl, SSL3_RECORD *rec, unsigned char *md, int sending)
{
- SSL3_RECORD *rec;
unsigned char *seq;
EVP_MD_CTX *hash;
size_t md_size;
int i;
- EVP_MD_CTX hmac, *mac_ctx;
+ EVP_MD_CTX *hmac = NULL, *mac_ctx;
unsigned char header[13];
- int stream_mac = (send ? (ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM)
+ int stream_mac = (sending ? (ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM)
: (ssl->mac_flags & SSL_MAC_FLAG_READ_MAC_STREAM));
int t;
- if (send) {
- rec = RECORD_LAYER_get_wrec(&ssl->rlayer);
+ if (sending) {
seq = RECORD_LAYER_get_write_sequence(&ssl->rlayer);
hash = ssl->write_hash;
} else {
- rec = RECORD_LAYER_get_rrec(&ssl->rlayer);
seq = RECORD_LAYER_get_read_sequence(&ssl->rlayer);
hash = ssl->read_hash;
}
if (stream_mac) {
mac_ctx = hash;
} else {
- if (!EVP_MD_CTX_copy(&hmac, hash))
- return -1;
- mac_ctx = &hmac;
+ hmac = EVP_MD_CTX_new();
+ if (hmac == NULL || !EVP_MD_CTX_copy(hmac, hash))
+ return 0;
+ mac_ctx = hmac;
}
if (SSL_IS_DTLS(ssl)) {
unsigned char dtlsseq[8], *p = dtlsseq;
- s2n(send ? DTLS_RECORD_LAYER_get_w_epoch(&ssl->rlayer) :
+ s2n(sending ? DTLS_RECORD_LAYER_get_w_epoch(&ssl->rlayer) :
DTLS_RECORD_LAYER_get_r_epoch(&ssl->rlayer), p);
memcpy(p, &seq[2], 6);
header[8] = rec->type;
header[9] = (unsigned char)(ssl->version >> 8);
header[10] = (unsigned char)(ssl->version);
- header[11] = (rec->length) >> 8;
- header[12] = (rec->length) & 0xff;
+ header[11] = (unsigned char)(rec->length >> 8);
+ header[12] = (unsigned char)(rec->length & 0xff);
- if (!send && !SSL_USE_ETM(ssl) &&
+ if (!sending && !SSL_READ_ETM(ssl) &&
EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
ssl3_cbc_record_digest_supported(mac_ctx)) {
/*
* are hashing because that gives an attacker a timing-oracle.
*/
/* Final param == not SSLv3 */
- ssl3_cbc_digest_record(mac_ctx,
- md, &md_size,
- header, rec->input,
- rec->length + md_size, rec->orig_len,
- ssl->s3->read_mac_secret,
- ssl->s3->read_mac_secret_size, 0);
+ if (ssl3_cbc_digest_record(mac_ctx,
+ md, &md_size,
+ header, rec->input,
+ rec->length + md_size, rec->orig_len,
+ ssl->s3->read_mac_secret,
+ ssl->s3->read_mac_secret_size, 0) <= 0) {
+ EVP_MD_CTX_free(hmac);
+ return -1;
+ }
} else {
- EVP_DigestSignUpdate(mac_ctx, header, sizeof(header));
- EVP_DigestSignUpdate(mac_ctx, rec->input, rec->length);
- t = EVP_DigestSignFinal(mac_ctx, md, &md_size);
- OPENSSL_assert(t > 0);
- if (!send && !SSL_USE_ETM(ssl) && FIPS_mode())
- tls_fips_digest_extra(ssl->enc_read_ctx,
- mac_ctx, rec->input,
- rec->length, rec->orig_len);
+ /* TODO(size_t): Convert these calls */
+ if (EVP_DigestSignUpdate(mac_ctx, header, sizeof(header)) <= 0
+ || EVP_DigestSignUpdate(mac_ctx, rec->input, rec->length) <= 0
+ || EVP_DigestSignFinal(mac_ctx, md, &md_size) <= 0) {
+ EVP_MD_CTX_free(hmac);
+ return 0;
+ }
}
- if (!stream_mac)
- EVP_MD_CTX_cleanup(&hmac);
-#ifdef TLS_DEBUG
+ EVP_MD_CTX_free(hmac);
+
+#ifdef SSL_DEBUG
fprintf(stderr, "seq=");
{
int z;
}
fprintf(stderr, "rec=");
{
- unsigned int z;
+ size_t z;
for (z = 0; z < rec->length; z++)
fprintf(stderr, "%02X ", rec->data[z]);
fprintf(stderr, "\n");
break;
}
}
-#ifdef TLS_DEBUG
+#ifdef SSL_DEBUG
{
unsigned int z;
for (z = 0; z < md_size; z++)
fprintf(stderr, "\n");
}
#endif
- return (md_size);
+ return 1;
}
/*-
* 1: if the padding was valid
* -1: otherwise.
*/
-int ssl3_cbc_remove_padding(const SSL *s,
- SSL3_RECORD *rec,
- unsigned block_size, unsigned mac_size)
+int ssl3_cbc_remove_padding(SSL3_RECORD *rec,
+ size_t block_size, size_t mac_size)
{
- unsigned padding_length, good;
- const unsigned overhead = 1 /* padding length byte */ + mac_size;
+ size_t padding_length;
+ size_t good;
+ const size_t overhead = 1 /* padding length byte */ + mac_size;
/*
* These lengths are all public so we can test them in non-constant time.
return 0;
padding_length = rec->data[rec->length - 1];
- good = constant_time_ge(rec->length, padding_length + overhead);
+ good = constant_time_ge_s(rec->length, padding_length + overhead);
/* SSLv3 requires that the padding is minimal. */
- good &= constant_time_ge(block_size, padding_length + 1);
+ good &= constant_time_ge_s(block_size, padding_length + 1);
rec->length -= good & (padding_length + 1);
- return constant_time_select_int(good, 1, -1);
+ return constant_time_select_int_s(good, 1, -1);
}
/*-
*/
int tls1_cbc_remove_padding(const SSL *s,
SSL3_RECORD *rec,
- unsigned block_size, unsigned mac_size)
+ size_t block_size, size_t mac_size)
{
- unsigned padding_length, good, to_check, i;
- const unsigned overhead = 1 /* padding length byte */ + mac_size;
+ size_t good;
+ size_t padding_length, to_check, i;
+ const size_t overhead = 1 /* padding length byte */ + mac_size;
/* Check if version requires explicit IV */
if (SSL_USE_EXPLICIT_IV(s)) {
/*
padding_length = rec->data[rec->length - 1];
- /*
- * NB: if compression is in operation the first packet may not be of even
- * length so the padding bug check cannot be performed. This bug
- * workaround has been around since SSLeay so hopefully it is either
- * fixed now or no buggy implementation supports compression [steve]
- */
- if ((s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) && !s->expand) {
- /* First packet is even in size, so check */
- if ((memcmp(RECORD_LAYER_get_read_sequence(&s->rlayer),
- "\0\0\0\0\0\0\0\0", 8) == 0) &&
- !(padding_length & 1)) {
- s->s3->flags |= TLS1_FLAGS_TLS_PADDING_BUG;
- }
- if ((s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) && padding_length > 0) {
- padding_length--;
- }
- }
-
- if (EVP_CIPHER_flags(s->enc_read_ctx->cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
+ if (EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_read_ctx)) &
+ EVP_CIPH_FLAG_AEAD_CIPHER) {
/* padding is already verified */
rec->length -= padding_length + 1;
return 1;
}
- good = constant_time_ge(rec->length, overhead + padding_length);
+ good = constant_time_ge_s(rec->length, overhead + padding_length);
/*
* The padding consists of a length byte at the end of the record and
* then that many bytes of padding, all with the same value as the length
* maximum amount of padding possible. (Again, the length of the record
* is public information so we can use it.)
*/
- to_check = 255; /* maximum amount of padding. */
- if (to_check > rec->length - 1)
- to_check = rec->length - 1;
+ to_check = 256; /* maximum amount of padding, inc length byte. */
+ if (to_check > rec->length)
+ to_check = rec->length;
for (i = 0; i < to_check; i++) {
- unsigned char mask = constant_time_ge_8(padding_length, i);
+ unsigned char mask = constant_time_ge_8_s(padding_length, i);
unsigned char b = rec->data[rec->length - 1 - i];
/*
* The final |padding_length+1| bytes should all have the value
* If any of the final |padding_length+1| bytes had the wrong value, one
* or more of the lower eight bits of |good| will be cleared.
*/
- good = constant_time_eq(0xff, good & 0xff);
+ good = constant_time_eq_s(0xff, good & 0xff);
rec->length -= good & (padding_length + 1);
- return constant_time_select_int(good, 1, -1);
+ return constant_time_select_int_s(good, 1, -1);
}
/*-
#define CBC_MAC_ROTATE_IN_PLACE
void ssl3_cbc_copy_mac(unsigned char *out,
- const SSL3_RECORD *rec, unsigned md_size)
+ const SSL3_RECORD *rec, size_t md_size)
{
#if defined(CBC_MAC_ROTATE_IN_PLACE)
unsigned char rotated_mac_buf[64 + EVP_MAX_MD_SIZE];
/*
* mac_end is the index of |rec->data| just after the end of the MAC.
*/
- unsigned mac_end = rec->length;
- unsigned mac_start = mac_end - md_size;
+ size_t mac_end = rec->length;
+ size_t mac_start = mac_end - md_size;
+ size_t in_mac;
/*
* scan_start contains the number of bytes that we can ignore because the
* MAC's position can only vary by 255 bytes.
*/
- unsigned scan_start = 0;
- unsigned i, j;
- unsigned div_spoiler;
- unsigned rotate_offset;
+ size_t scan_start = 0;
+ size_t i, j;
+ size_t rotate_offset;
OPENSSL_assert(rec->orig_len >= md_size);
OPENSSL_assert(md_size <= EVP_MAX_MD_SIZE);
/* This information is public so it's safe to branch based on it. */
if (rec->orig_len > md_size + 255 + 1)
scan_start = rec->orig_len - (md_size + 255 + 1);
- /*
- * div_spoiler contains a multiple of md_size that is used to cause the
- * modulo operation to be constant time. Without this, the time varies
- * based on the amount of padding when running on Intel chips at least.
- * The aim of right-shifting md_size is so that the compiler doesn't
- * figure out that it can remove div_spoiler as that would require it to
- * prove that md_size is always even, which I hope is beyond it.
- */
- div_spoiler = md_size >> 1;
- div_spoiler <<= (sizeof(div_spoiler) - 1) * 8;
- rotate_offset = (div_spoiler + mac_start - scan_start) % md_size;
+ in_mac = 0;
+ rotate_offset = 0;
memset(rotated_mac, 0, md_size);
for (i = scan_start, j = 0; i < rec->orig_len; i++) {
- unsigned char mac_started = constant_time_ge_8(i, mac_start);
- unsigned char mac_ended = constant_time_ge_8(i, mac_end);
+ size_t mac_started = constant_time_eq_s(i, mac_start);
+ size_t mac_ended = constant_time_lt_s(i, mac_end);
unsigned char b = rec->data[i];
- rotated_mac[j++] |= b & mac_started & ~mac_ended;
- j &= constant_time_lt(j, md_size);
+
+ in_mac |= mac_started;
+ in_mac &= mac_ended;
+ rotate_offset |= j & mac_started;
+ rotated_mac[j++] |= b & in_mac;
+ j &= constant_time_lt_s(j, md_size);
}
/* Now rotate the MAC */
/* in case cache-line is 32 bytes, touch second line */
((volatile unsigned char *)rotated_mac)[rotate_offset ^ 32];
out[j++] = rotated_mac[rotate_offset++];
- rotate_offset &= constant_time_lt(rotate_offset, md_size);
+ rotate_offset &= constant_time_lt_s(rotate_offset, md_size);
}
#else
memset(out, 0, md_size);
rotate_offset = md_size - rotate_offset;
- rotate_offset &= constant_time_lt(rotate_offset, md_size);
+ rotate_offset &= constant_time_lt_s(rotate_offset, md_size);
for (i = 0; i < md_size; i++) {
for (j = 0; j < md_size; j++)
- out[j] |= rotated_mac[i] & constant_time_eq_8(j, rotate_offset);
+ out[j] |= rotated_mac[i] & constant_time_eq_8_s(j, rotate_offset);
rotate_offset++;
- rotate_offset &= constant_time_lt(rotate_offset, md_size);
+ rotate_offset &= constant_time_lt_s(rotate_offset, md_size);
}
#endif
}
-int dtls1_process_record(SSL *s)
+int dtls1_process_record(SSL *s, DTLS1_BITMAP *bitmap)
{
int i, al;
int enc_err;
SSL_SESSION *sess;
SSL3_RECORD *rr;
- unsigned int mac_size;
+ int imac_size;
+ size_t mac_size;
unsigned char md[EVP_MAX_MD_SIZE];
rr = RECORD_LAYER_get_rrec(&s->rlayer);
rr->data = rr->input;
rr->orig_len = rr->length;
- enc_err = s->method->ssl3_enc->enc(s, 0);
+ if (SSL_READ_ETM(s) && s->read_hash) {
+ unsigned char *mac;
+ mac_size = EVP_MD_CTX_size(s->read_hash);
+ OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);
+ if (rr->orig_len < mac_size) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_DTLS1_PROCESS_RECORD, SSL_R_LENGTH_TOO_SHORT);
+ goto f_err;
+ }
+ rr->length -= mac_size;
+ mac = rr->data + rr->length;
+ i = s->method->ssl3_enc->mac(s, rr, md, 0 /* not send */ );
+ if (i == 0 || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0) {
+ al = SSL_AD_BAD_RECORD_MAC;
+ SSLerr(SSL_F_DTLS1_PROCESS_RECORD,
+ SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
+ goto f_err;
+ }
+ }
+
+ enc_err = s->method->ssl3_enc->enc(s, rr, 1, 0);
/*-
* enc_err is:
* 0: (in non-constant time) if the record is publically invalid.
RECORD_LAYER_reset_packet_length(&s->rlayer);
goto err;
}
-#ifdef TLS_DEBUG
- printf("dec %d\n", rr->length);
+#ifdef SSL_DEBUG
+ printf("dec %ld\n", rr->length);
{
- unsigned int z;
+ size_t z;
for (z = 0; z < rr->length; z++)
printf("%02X%c", rr->data[z], ((z + 1) % 16) ? ' ' : '\n');
}
#endif
/* r->length is now the compressed data plus mac */
- if ((sess != NULL) &&
+ if ((sess != NULL) && !SSL_READ_ETM(s) &&
(s->enc_read_ctx != NULL) && (EVP_MD_CTX_md(s->read_hash) != NULL)) {
/* s->read_hash != NULL => mac_size != -1 */
unsigned char *mac = NULL;
unsigned char mac_tmp[EVP_MAX_MD_SIZE];
- mac_size = EVP_MD_CTX_size(s->read_hash);
+
+ /* TODO(size_t): Convert this to do size_t properly */
+ imac_size = EVP_MD_CTX_size(s->read_hash);
+ if (imac_size < 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_DTLS1_PROCESS_RECORD, ERR_LIB_EVP);
+ goto f_err;
+ }
+ mac_size = (size_t)imac_size;
OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);
/*
mac = &rr->data[rr->length];
}
- i = s->method->ssl3_enc->mac(s, md, 0 /* not send */ );
- if (i < 0 || mac == NULL
- || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0)
+ i = s->method->ssl3_enc->mac(s, rr, md, 0 /* not send */ );
+ if (i == 0 || mac == NULL
+ || CRYPTO_memcmp(md, mac, mac_size) != 0)
enc_err = -1;
if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH + mac_size)
enc_err = -1;
SSL_R_COMPRESSED_LENGTH_TOO_LONG);
goto f_err;
}
- if (!ssl3_do_uncompress(s)) {
+ if (!ssl3_do_uncompress(s, rr)) {
al = SSL_AD_DECOMPRESSION_FAILURE;
SSLerr(SSL_F_DTLS1_PROCESS_RECORD, SSL_R_BAD_DECOMPRESSION);
goto f_err;
/* we have pulled in a full packet so zero things */
RECORD_LAYER_reset_packet_length(&s->rlayer);
+
+ /* Mark receipt of record. */
+ dtls1_record_bitmap_update(s, bitmap);
+
return (1);
f_err:
return (0);
}
-
/*
- * retrieve a buffered record that belongs to the current epoch, ie,
- * processed
+ * Retrieve a buffered record that belongs to the current epoch, i.e. processed
*/
#define dtls1_get_processed_record(s) \
dtls1_retrieve_buffered_record((s), \
int dtls1_get_record(SSL *s)
{
int ssl_major, ssl_minor;
- int i, n;
+ int rret;
+ size_t more, n;
SSL3_RECORD *rr;
unsigned char *p = NULL;
unsigned short version;
rr = RECORD_LAYER_get_rrec(&s->rlayer);
+ again:
/*
* The epoch may have changed. If so, process all the pending records.
* This is a non-blocking operation.
*/
- if (dtls1_process_buffered_records(s) < 0)
+ if (!dtls1_process_buffered_records(s))
return -1;
/* if we're renegotiating, then there may be buffered records */
return 1;
/* get something from the wire */
- again:
+
/* check if we have the header */
if ((RECORD_LAYER_get_rstate(&s->rlayer) != SSL_ST_READ_BODY) ||
(RECORD_LAYER_get_packet_length(&s->rlayer) < DTLS1_RT_HEADER_LENGTH)) {
- n = ssl3_read_n(s, DTLS1_RT_HEADER_LENGTH,
- SSL3_BUFFER_get_len(&s->rlayer.rbuf), 0);
+ rret = ssl3_read_n(s, DTLS1_RT_HEADER_LENGTH,
+ SSL3_BUFFER_get_len(&s->rlayer.rbuf), 0, 1, &n);
/* read timeout is handled by dtls1_read_bytes */
- if (n <= 0)
- return (n); /* error or non-blocking */
+ if (rret <= 0)
+ return rret; /* error or non-blocking */
/* this packet contained a partial record, dump it */
- if (RECORD_LAYER_get_packet_length(&s->rlayer) != DTLS1_RT_HEADER_LENGTH) {
+ if (RECORD_LAYER_get_packet_length(&s->rlayer) !=
+ DTLS1_RT_HEADER_LENGTH) {
RECORD_LAYER_reset_packet_length(&s->rlayer);
goto again;
}
if (rr->length >
RECORD_LAYER_get_packet_length(&s->rlayer) - DTLS1_RT_HEADER_LENGTH) {
/* now s->packet_length == DTLS1_RT_HEADER_LENGTH */
- i = rr->length;
- n = ssl3_read_n(s, i, i, 1);
+ more = rr->length;
+ rret = ssl3_read_n(s, more, more, 1, 1, &n);
/* this packet contained a partial record, dump it */
- if (n != i) {
+ if (rret <= 0 || n != more) {
rr->length = 0;
RECORD_LAYER_reset_packet_length(&s->rlayer);
goto again;
bitmap = dtls1_get_bitmap(s, rr, &is_next_epoch);
if (bitmap == NULL) {
rr->length = 0;
- RECORD_LAYER_reset_packet_length(&s->rlayer); /* dump this record */
+ RECORD_LAYER_reset_packet_length(&s->rlayer); /* dump this record */
goto again; /* get another record */
}
#ifndef OPENSSL_NO_SCTP
/* Only do replay check if no SCTP bio */
if (!BIO_dgram_is_sctp(SSL_get_rbio(s))) {
#endif
+ /* Check whether this is a repeat, or aged record. */
/*
- * Check whether this is a repeat, or aged record. Don't check if
- * we're listening and this message is a ClientHello. They can look
- * as if they're replayed, since they arrive from different
- * connections and would be dropped unnecessarily.
+ * TODO: Does it make sense to have replay protection in epoch 0 where
+ * we have no integrity negotiated yet?
*/
- if (!(s->d1->listen && rr->type == SSL3_RT_HANDSHAKE &&
- RECORD_LAYER_get_packet_length(&s->rlayer)
- > DTLS1_RT_HEADER_LENGTH &&
- RECORD_LAYER_get_packet(&s->rlayer)[DTLS1_RT_HEADER_LENGTH]
- == SSL3_MT_CLIENT_HELLO) &&
- !dtls1_record_replay_check(s, bitmap)) {
+ if (!dtls1_record_replay_check(s, bitmap)) {
rr->length = 0;
RECORD_LAYER_reset_packet_length(&s->rlayer); /* dump this record */
goto again; /* get another record */
/*
* If this record is from the next epoch (either HM or ALERT), and a
* handshake is currently in progress, buffer it since it cannot be
- * processed at this time. However, do not buffer anything while
- * listening.
+ * processed at this time.
*/
if (is_next_epoch) {
- if ((SSL_in_init(s) || s->in_handshake) && !s->d1->listen) {
+ if ((SSL_in_init(s) || ossl_statem_get_in_handshake(s))) {
if (dtls1_buffer_record
(s, &(DTLS_RECORD_LAYER_get_unprocessed_rcds(&s->rlayer)),
- rr->seq_num) < 0)
+ rr->seq_num) < 0)
return -1;
- /* Mark receipt of record. */
- dtls1_record_bitmap_update(s, bitmap);
}
rr->length = 0;
RECORD_LAYER_reset_packet_length(&s->rlayer);
goto again;
}
- if (!dtls1_process_record(s)) {
+ if (!dtls1_process_record(s, bitmap)) {
rr->length = 0;
- RECORD_LAYER_reset_packet_length(&s->rlayer); /* dump this record */
+ RECORD_LAYER_reset_packet_length(&s->rlayer); /* dump this record */
goto again; /* get another record */
}
- dtls1_record_bitmap_update(s, bitmap); /* Mark receipt of record. */
return (1);
}
-
projects / openssl.git / blobdiff