X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Frecord%2Frec_layer_s3.c;h=01caf4c3726520640590030e907bf37fe7101022;hp=91b8205ee99167177d06b12756b83d2536824142;hb=dffdcc773ac0a294b1ce620131cb8d7401da9408;hpb=0220fee47f912c9c89efe24c09e10f4d452a4d42 diff --git a/ssl/record/rec_layer_s3.c b/ssl/record/rec_layer_s3.c index 91b8205ee9..01caf4c372 100644 --- a/ssl/record/rec_layer_s3.c +++ b/ssl/record/rec_layer_s3.c @@ -1,111 +1,10 @@ -/* 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) 1998-2002 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 @@ -117,16 +16,12 @@ #include #include #include "record_locl.h" - -#ifndef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK -# define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 -#endif +#include "../packet_locl.h" #if defined(OPENSSL_SMALL_FOOTPRINT) || \ !( defined(AES_ASM) && ( \ defined(__x86_64) || defined(__x86_64__) || \ - defined(_M_AMD64) || defined(_M_X64) || \ - defined(__INTEL__) ) \ + defined(_M_AMD64) || defined(_M_X64) ) \ ) # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 @@ -135,17 +30,16 @@ void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s) { rl->s = s; + RECORD_LAYER_set_first_record(&s->rlayer); SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); - SSL3_RECORD_clear(&rl->wrec, 1); } void RECORD_LAYER_clear(RECORD_LAYER *rl) { - unsigned int pipes; - rl->rstate = SSL_ST_READ_HEADER; - /* Do I need to clear read_ahead? As far as I can tell read_ahead did not + /* + * Do I need to clear read_ahead? As far as I can tell read_ahead did not * previously get reset by SSL_clear...so I'll keep it that way..but is * that right? */ @@ -153,8 +47,6 @@ void RECORD_LAYER_clear(RECORD_LAYER *rl) rl->packet = NULL; rl->packet_length = 0; rl->wnum = 0; - memset(rl->alert_fragment, 0, sizeof(rl->alert_fragment)); - rl->alert_fragment_len = 0; memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); rl->handshake_fragment_len = 0; rl->wpend_tot = 0; @@ -163,15 +55,13 @@ void RECORD_LAYER_clear(RECORD_LAYER *rl) rl->wpend_buf = NULL; SSL3_BUFFER_clear(&rl->rbuf); - for(pipes = 0; pipes < rl->numwpipes; pipes++) - SSL3_BUFFER_clear(&rl->wbuf[pipes]); - rl->numwpipes = 0; + ssl3_release_write_buffer(rl->s); + rl->numrpipes = 0; SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); - SSL3_RECORD_clear(&rl->wrec, 1); RECORD_LAYER_reset_read_sequence(rl); RECORD_LAYER_reset_write_sequence(rl); - + if (rl->d) DTLS_RECORD_LAYER_clear(rl); } @@ -182,35 +72,31 @@ void RECORD_LAYER_release(RECORD_LAYER *rl) ssl3_release_read_buffer(rl->s); if (rl->numwpipes > 0) ssl3_release_write_buffer(rl->s); - /* TODO: Check why there is no release of wrec here?? */ SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); } -int RECORD_LAYER_read_pending(RECORD_LAYER *rl) +/* Checks if we have unprocessed read ahead data pending */ +int RECORD_LAYER_read_pending(const RECORD_LAYER *rl) { return SSL3_BUFFER_get_left(&rl->rbuf) != 0; } -int RECORD_LAYER_write_pending(RECORD_LAYER *rl) +/* Checks if we have decrypted unread record data pending */ +int RECORD_LAYER_processed_read_pending(const RECORD_LAYER *rl) { - return (rl->numwpipes > 0) - && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes-1]) != 0; -} + size_t curr_rec = 0, num_recs = RECORD_LAYER_get_numrpipes(rl); + const SSL3_RECORD *rr = rl->rrec; -int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len) -{ - rl->packet_length = len; - if (len != 0) { - rl->rstate = SSL_ST_READ_HEADER; - if (!SSL3_BUFFER_is_initialised(&rl->rbuf)) - if (!ssl3_setup_read_buffer(rl->s)) - return 0; - } + while (curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec])) + curr_rec++; - rl->packet = SSL3_BUFFER_get_buf(&rl->rbuf); - SSL3_BUFFER_set_data(&rl->rbuf, buf, len); + return curr_rec < num_recs; +} - return 1; +int RECORD_LAYER_write_pending(const RECORD_LAYER *rl) +{ + return (rl->numwpipes > 0) + && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0; } void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) @@ -223,17 +109,16 @@ void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); } -int ssl3_pending(const SSL *s) +size_t ssl3_pending(const SSL *s) { - unsigned int i; - int num = 0; + size_t i, num = 0; if (s->rlayer.rstate == SSL_ST_READ_BODY) return 0; for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) - != SSL3_RT_APPLICATION_DATA) + != SSL3_RT_APPLICATION_DATA) return 0; num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); } @@ -241,49 +126,49 @@ int ssl3_pending(const SSL *s) return num; } -const char *SSL_rstate_string_long(const SSL *s) +void SSL_CTX_set_default_read_buffer_len(SSL_CTX *ctx, size_t len) +{ + ctx->default_read_buf_len = len; +} + +void SSL_set_default_read_buffer_len(SSL *s, size_t len) { - const char *str; + SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s->rlayer), len); +} +const char *SSL_rstate_string_long(const SSL *s) +{ switch (s->rlayer.rstate) { case SSL_ST_READ_HEADER: - str = "read header"; - break; + return "read header"; case SSL_ST_READ_BODY: - str = "read body"; - break; + return "read body"; case SSL_ST_READ_DONE: - str = "read done"; - break; + return "read done"; default: - str = "unknown"; - break; + return "unknown"; } - return (str); } const char *SSL_rstate_string(const SSL *s) { - const char *str; - switch (s->rlayer.rstate) { case SSL_ST_READ_HEADER: - str = "RH"; - break; + return "RH"; case SSL_ST_READ_BODY: - str = "RB"; - break; + return "RB"; case SSL_ST_READ_DONE: - str = "RD"; - break; + return "RD"; default: - str = "unknown"; - break; + return "unknown"; } - return (str); } -int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) +/* + * Return values are as per SSL_read() + */ +int ssl3_read_n(SSL *s, size_t n, size_t max, int extend, int clearold, + size_t *readbytes) { /* * If extend == 0, obtain new n-byte packet; if extend == 1, increase @@ -294,13 +179,12 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) * if clearold == 1, move the packet to the start of the buffer; if * clearold == 0 then leave any old packets where they were */ - int i, len, left; - size_t align = 0; + size_t len, left, align = 0; unsigned char *pkt; SSL3_BUFFER *rb; - if (n <= 0) - return n; + if (n == 0) + return 0; rb = &s->rlayer.rbuf; if (rb->buf == NULL) @@ -310,7 +194,7 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) left = rb->left; #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; - align = (0-align) & (SSL3_ALIGN_PAYLOAD - 1); + align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); #endif if (!extend) { @@ -341,6 +225,18 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) /* ... now we can act as if 'extend' was set */ } + len = s->rlayer.packet_length; + pkt = rb->buf + align; + /* + * Move any available bytes to front of buffer: 'len' bytes already + * pointed to by 'packet', 'left' extra ones at the end + */ + if (s->rlayer.packet != pkt && clearold == 1) { + memmove(pkt, s->rlayer.packet, len + left); + s->rlayer.packet = pkt; + rb->offset = len + align; + } + /* * For DTLS/UDP reads should not span multiple packets because the read * operation returns the whole packet at once (as long as it fits into @@ -358,24 +254,13 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) s->rlayer.packet_length += n; rb->left = left - n; rb->offset += n; - return (n); + *readbytes = n; + return 1; } /* else we need to read more data */ - len = s->rlayer.packet_length; - pkt = rb->buf + align; - /* - * Move any available bytes to front of buffer: 'len' bytes already - * pointed to by 'packet', 'left' extra ones at the end - */ - if (s->rlayer.packet != pkt && clearold == 1) { /* len > 0 */ - memmove(pkt, s->rlayer.packet, len + left); - s->rlayer.packet = pkt; - rb->offset = len + align; - } - - if (n > (int)(rb->len - rb->offset)) { /* does not happen */ + if (n > rb->len - rb->offset) { /* does not happen */ SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); return -1; } @@ -387,11 +272,14 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) else { if (max < n) max = n; - if (max > (int)(rb->len - rb->offset)) + if (max > rb->len - rb->offset) max = rb->len - rb->offset; } while (left < n) { + size_t bioread = 0; + int ret; + /* * Now we have len+left bytes at the front of s->s3->rbuf.buf and * need to read in more until we have len+n (up to len+max if @@ -401,20 +289,23 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) clear_sys_error(); if (s->rbio != NULL) { s->rwstate = SSL_READING; - i = BIO_read(s->rbio, pkt + len + left, max - left); + /* TODO(size_t): Convert this function */ + ret = BIO_read(s->rbio, pkt + len + left, max - left); + if (ret >= 0) + bioread = ret; } else { SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); - i = -1; + ret = -1; } - if (i <= 0) { + if (ret <= 0) { rb->left = left; if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) if (len + left == 0) ssl3_release_read_buffer(s); - return (i); + return ret; } - left += i; + left += bioread; /* * reads should *never* span multiple packets for DTLS because the * underlying transport protocol is message oriented as opposed to @@ -431,30 +322,26 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold) rb->left = left - n; s->rlayer.packet_length += n; s->rwstate = SSL_NOTHING; - return (n); + *readbytes = n; + return 1; } - /* * Call this to write data in records of type 'type' It will return <= 0 if * not all data has been sent or non-blocking IO. */ -int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) +int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len, + size_t *written) { const unsigned char *buf = buf_; - int tot; - unsigned int n, nw; + size_t tot; + size_t n, split_send_fragment, maxpipes; #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK - unsigned int max_send_fragment, split_send_fragment, maxpipes; - unsigned int u_len = (unsigned int)len; + size_t max_send_fragment, nw; #endif SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; int i; - - if (len < 0) { - SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_NEGATIVE_LENGTH); - return -1; - } + size_t tmpwrit; s->rwstate = SSL_NOTHING; tot = s->rlayer.wnum; @@ -467,18 +354,28 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) * promptly send beyond the end of the users buffer ... so we trap and * report the error in a way the user will notice */ - if ((unsigned int)len < s->rlayer.wnum) { + if ((len < s->rlayer.wnum) + || ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) { SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); return -1; } + if (s->early_data_state == SSL_EARLY_DATA_WRITING + && !early_data_count_ok(s, len, 0, NULL)) + return -1; s->rlayer.wnum = 0; - if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) { + /* + * When writing early data on the server side we could be "in_init" in + * between receiving the EoED and the CF - but we don't want to handle those + * messages yet. + */ + if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s) + && s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) { i = s->handshake_func(s); if (i < 0) - return (i); + return i; if (i == 0) { SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); return -1; @@ -490,30 +387,32 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) * will happen with non blocking IO */ if (wb->left != 0) { - i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot); + i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, + &tmpwrit); if (i <= 0) { /* XXX should we ssl3_release_write_buffer if i<0? */ s->rlayer.wnum = tot; return i; } - tot += i; /* this might be last fragment */ + tot += tmpwrit; /* this might be last fragment */ } #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK /* * Depending on platform multi-block can deliver several *times* * better performance. Downside is that it has to allocate - * jumbo buffer to accomodate up to 8 records, but the + * jumbo buffer to accommodate up to 8 records, but the * compromise is considered worthy. */ if (type == SSL3_RT_APPLICATION_DATA && - u_len >= 4 * (max_send_fragment = s->max_send_fragment) && + len >= 4 * (max_send_fragment = s->max_send_fragment) && s->compress == NULL && s->msg_callback == NULL && - !SSL_USE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && + !SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { unsigned char aad[13]; EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; - int packlen; + size_t packlen; + int packleni; /* minimize address aliasing conflicts */ if ((max_send_fragment & 0xfff) == 0) @@ -524,30 +423,29 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, - max_send_fragment, NULL); + (int)max_send_fragment, NULL); - if (u_len >= 8 * max_send_fragment) + if (len >= 8 * max_send_fragment) packlen *= 8; else packlen *= 4; - wb->buf = OPENSSL_malloc(packlen); - if (wb->buf == NULL) { + if (!ssl3_setup_write_buffer(s, 1, packlen)) { SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); return -1; } - wb->len = packlen; } else if (tot == len) { /* done? */ - OPENSSL_free(wb->buf); /* free jumbo buffer */ - wb->buf = NULL; - return tot; + /* free jumbo buffer */ + ssl3_release_write_buffer(s); + *written = tot; + return 1; } n = (len - tot); for (;;) { if (n < 4 * max_send_fragment) { - OPENSSL_free(wb->buf); /* free jumbo buffer */ - wb->buf = NULL; + /* free jumbo buffer */ + ssl3_release_write_buffer(s); break; } @@ -574,13 +472,13 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) mb_param.inp = aad; mb_param.len = nw; - packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, + packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, sizeof(mb_param), &mb_param); - - if (packlen <= 0 || packlen > (int)wb->len) { /* never happens */ - OPENSSL_free(wb->buf); /* free jumbo buffer */ - wb->buf = NULL; + packlen = (size_t)packleni; + if (packleni <= 0 || packlen > wb->len) { /* never happens */ + /* free jumbo buffer */ + ssl3_release_write_buffer(s); break; } @@ -607,22 +505,23 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) s->rlayer.wpend_type = type; s->rlayer.wpend_ret = nw; - i = ssl3_write_pending(s, type, &buf[tot], nw); + i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); if (i <= 0) { if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { - OPENSSL_free(wb->buf); - wb->buf = NULL; + /* free jumbo buffer */ + ssl3_release_write_buffer(s); } s->rlayer.wnum = tot; return i; } - if (i == (int)n) { - OPENSSL_free(wb->buf); /* free jumbo buffer */ - wb->buf = NULL; - return tot + i; + if (tmpwrit == n) { + /* free jumbo buffer */ + ssl3_release_write_buffer(s); + *written = tot + tmpwrit; + return 1; } - n -= i; - tot += i; + n -= tmpwrit; + tot += tmpwrit; } } else #endif @@ -630,7 +529,8 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) ssl3_release_write_buffer(s); - return tot; + *written = tot; + return 1; } n = (len - tot); @@ -638,7 +538,7 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) split_send_fragment = s->split_send_fragment; /* * If max_pipelines is 0 then this means "undefined" and we default to - * 1 pipeline. Similaraly if the cipher does not support pipelined + * 1 pipeline. Similarly if the cipher does not support pipelined * processing then we also only use 1 pipeline, or if we're not using * explicit IVs */ @@ -647,29 +547,29 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) /* * We should have prevented this when we set max_pipelines so we * shouldn't get here - */ + */ SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); return -1; } if (maxpipes == 0 - || s->enc_write_ctx == NULL - || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) - & EVP_CIPH_FLAG_PIPELINE) - || !SSL_USE_EXPLICIT_IV(s)) + || s->enc_write_ctx == NULL + || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) + & EVP_CIPH_FLAG_PIPELINE) + || !SSL_USE_EXPLICIT_IV(s)) maxpipes = 1; if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment - || split_send_fragment == 0) { + || split_send_fragment == 0) { /* * We should have prevented this when we set the split and max send * fragments so we shouldn't get here - */ + */ SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); return -1; } for (;;) { - unsigned int pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; - unsigned int numpipes, j; + size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; + size_t numpipes, j; if (n == 0) numpipes = 1; @@ -697,14 +597,15 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) } } - i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0); + i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0, + &tmpwrit); if (i <= 0) { /* XXX should we ssl3_release_write_buffer if i<0? */ s->rlayer.wnum = tot; return i; } - if ((i == (int)n) || + if (tmpwrit == n || (type == SSL3_RT_APPLICATION_DATA && (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { /* @@ -717,28 +618,32 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) !SSL_IS_DTLS(s)) ssl3_release_write_buffer(s); - return tot + i; + *written = tot + tmpwrit; + return 1; } - n -= i; - tot += i; + n -= tmpwrit; + tot += tmpwrit; } } int do_ssl3_write(SSL *s, int type, const unsigned char *buf, - unsigned int *pipelens, unsigned int numpipes, - int create_empty_fragment) + size_t *pipelens, size_t numpipes, + int create_empty_fragment, size_t *written) { - unsigned char *outbuf[SSL_MAX_PIPELINES], *plen[SSL_MAX_PIPELINES]; + WPACKET pkt[SSL_MAX_PIPELINES]; SSL3_RECORD wr[SSL_MAX_PIPELINES]; + WPACKET *thispkt; + SSL3_RECORD *thiswr; + unsigned char *recordstart; int i, mac_size, clear = 0; - int prefix_len = 0; - int eivlen; + size_t prefix_len = 0; + int eivlen = 0; size_t align = 0; SSL3_BUFFER *wb; SSL_SESSION *sess; - unsigned int totlen = 0; - unsigned int j; + size_t totlen = 0, len, wpinited = 0; + size_t j; for (j = 0; j < numpipes; j++) totlen += pipelens[j]; @@ -747,7 +652,7 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf, * will happen with non blocking IO */ if (RECORD_LAYER_write_pending(&s->rlayer)) - return (ssl3_write_pending(s, type, buf, totlen)); + return ssl3_write_pending(s, type, buf, totlen, written); /* If we have an alert to send, lets send it */ if (s->s3->alert_dispatch) { @@ -758,7 +663,7 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf, } if (s->rlayer.numwpipes < numpipes) - if (!ssl3_setup_write_buffer(s, numpipes)) + if (!ssl3_setup_write_buffer(s, numpipes, 0)) return -1; if (totlen == 0 && !create_empty_fragment) @@ -767,11 +672,11 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf, sess = s->session; if ((sess == NULL) || - (s->enc_write_ctx == NULL) || - (EVP_MD_CTX_md(s->write_hash) == NULL)) { + (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) { clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ mac_size = 0; } else { + /* TODO(siz_t): Convert me */ mac_size = EVP_MD_CTX_size(s->write_hash); if (mac_size < 0) goto err; @@ -793,15 +698,15 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf, * 'prefix_len' bytes are sent out later together with the actual * payload) */ - unsigned int tmppipelen = 0; + size_t tmppipelen = 0; + int ret; - prefix_len = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1); - if (prefix_len <= 0) + ret = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1, &prefix_len); + if (ret <= 0) goto err; if (prefix_len > - (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) - { + (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) { /* insufficient space */ SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); goto err; @@ -817,141 +722,298 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf, /* * extra fragment would be couple of cipher blocks, which would be * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real - * payload, then we can just pretent we simply have two headers. + * payload, then we can just pretend we simply have two headers. */ align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; - align = (0-align) & (SSL3_ALIGN_PAYLOAD - 1); + align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); #endif - outbuf[0] = SSL3_BUFFER_get_buf(wb) + align; SSL3_BUFFER_set_offset(wb, align); + if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), + SSL3_BUFFER_get_len(wb), 0) + || !WPACKET_allocate_bytes(&pkt[0], align, NULL)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } + wpinited = 1; } else if (prefix_len) { wb = &s->rlayer.wbuf[0]; - outbuf[0] = SSL3_BUFFER_get_buf(wb) + SSL3_BUFFER_get_offset(wb) - + prefix_len; + if (!WPACKET_init_static_len(&pkt[0], + SSL3_BUFFER_get_buf(wb), + SSL3_BUFFER_get_len(wb), 0) + || !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb) + + prefix_len, NULL)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } + wpinited = 1; } else { - for (j=0; j < numpipes; j++) { + for (j = 0; j < numpipes; j++) { + thispkt = &pkt[j]; + wb = &s->rlayer.wbuf[j]; -#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 +#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; - align = (-align) & (SSL3_ALIGN_PAYLOAD - 1); + align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); #endif - outbuf[j] = SSL3_BUFFER_get_buf(wb) + align; SSL3_BUFFER_set_offset(wb, align); + if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), + SSL3_BUFFER_get_len(wb), 0) + || !WPACKET_allocate_bytes(thispkt, align, NULL)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } + wpinited++; } } /* Explicit IV length, block ciphers appropriate version flag */ - if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s)) { + if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s) && !SSL_TREAT_AS_TLS13(s)) { int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); if (mode == EVP_CIPH_CBC_MODE) { + /* TODO(size_t): Convert me */ eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); if (eivlen <= 1) eivlen = 0; - } - /* Need explicit part of IV for GCM mode */ - else if (mode == EVP_CIPH_GCM_MODE) + } else if (mode == EVP_CIPH_GCM_MODE) { + /* Need explicit part of IV for GCM mode */ eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; - else if (mode == EVP_CIPH_CCM_MODE) + } else if (mode == EVP_CIPH_CCM_MODE) { eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; - else - eivlen = 0; - } else - eivlen = 0; - + } + } totlen = 0; /* Clear our SSL3_RECORD structures */ memset(wr, 0, sizeof wr); - for (j=0; j < numpipes; j++) { - /* write the header */ - *(outbuf[j]++) = type & 0xff; - SSL3_RECORD_set_type(&wr[j], type); + for (j = 0; j < numpipes; j++) { + unsigned int version = SSL_TREAT_AS_TLS13(s) ? TLS1_VERSION : s->version; + unsigned char *compressdata = NULL; + size_t maxcomplen; + unsigned int rectype; + + thispkt = &pkt[j]; + thiswr = &wr[j]; - *(outbuf[j]++) = (s->version >> 8); + SSL3_RECORD_set_type(thiswr, type); /* - * Some servers hang if iniatial client hello is larger than 256 bytes + * In TLSv1.3, once encrypting, we always use application data for the + * record type + */ + if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) + rectype = SSL3_RT_APPLICATION_DATA; + else + rectype = type; + /* + * Some servers hang if initial client hello is larger than 256 bytes * and record version number > TLS 1.0 */ if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO && !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION) - *(outbuf[j]++) = 0x1; - else - *(outbuf[j]++) = s->version & 0xff; + version = TLS1_VERSION; + + maxcomplen = pipelens[j]; + if (s->compress != NULL) + maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; - /* field where we are to write out packet length */ - plen[j] = outbuf[j]; - outbuf[j] += 2; + /* write the header */ + if (!WPACKET_put_bytes_u8(thispkt, rectype) + || !WPACKET_put_bytes_u16(thispkt, version) + || !WPACKET_start_sub_packet_u16(thispkt) + || (eivlen > 0 + && !WPACKET_allocate_bytes(thispkt, eivlen, NULL)) + || (maxcomplen > 0 + && !WPACKET_reserve_bytes(thispkt, maxcomplen, + &compressdata))) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } /* lets setup the record stuff. */ - SSL3_RECORD_set_data(&wr[j], outbuf[j] + eivlen); - SSL3_RECORD_set_length(&wr[j], (int)pipelens[j]); - SSL3_RECORD_set_input(&wr[j], (unsigned char *)&buf[totlen]); + SSL3_RECORD_set_data(thiswr, compressdata); + SSL3_RECORD_set_length(thiswr, pipelens[j]); + SSL3_RECORD_set_input(thiswr, (unsigned char *)&buf[totlen]); totlen += pipelens[j]; /* - * we now 'read' from wr->input, wr->length bytes into wr->data + * we now 'read' from thiswr->input, thiswr->length bytes into + * thiswr->data */ /* first we compress */ if (s->compress != NULL) { - if (!ssl3_do_compress(s, &wr[j])) { + /* + * TODO(TLS1.3): Make sure we prevent compression!!! + */ + if (!ssl3_do_compress(s, thiswr) + || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); goto err; } } else { - memcpy(wr[j].data, wr[j].input, wr[j].length); + if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } SSL3_RECORD_reset_input(&wr[j]); } + if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { + size_t rlen; + + if (!WPACKET_put_bytes_u8(thispkt, type)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } + SSL3_RECORD_add_length(thiswr, 1); + + /* Add TLS1.3 padding */ + rlen = SSL3_RECORD_get_length(thiswr); + if (rlen < SSL3_RT_MAX_PLAIN_LENGTH) { + size_t padding = 0; + size_t max_padding = SSL3_RT_MAX_PLAIN_LENGTH - rlen; + if (s->record_padding_cb != NULL) { + padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg); + } else if (s->block_padding > 0) { + size_t mask = s->block_padding - 1; + size_t remainder; + + /* optimize for power of 2 */ + if ((s->block_padding & mask) == 0) + remainder = rlen & mask; + else + remainder = rlen % s->block_padding; + /* don't want to add a block of padding if we don't have to */ + if (remainder == 0) + padding = 0; + else + padding = s->block_padding - remainder; + } + if (padding > 0) { + /* do not allow the record to exceed max plaintext length */ + if (padding > max_padding) + padding = max_padding; + if (!WPACKET_memset(thispkt, 0, padding)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } + SSL3_RECORD_add_length(thiswr, padding); + } + } + } + /* - * we should still have the output to wr->data and the input from - * wr->input. Length should be wr->length. wr->data still points in the - * wb->buf + * we should still have the output to thiswr->data and the input from + * wr->input. Length should be thiswr->length. thiswr->data still points + * in the wb->buf */ - if (!SSL_USE_ETM(s) && mac_size != 0) { - if (s->method->ssl3_enc->mac(s, &wr[j], - &(outbuf[j][wr[j].length + eivlen]), 1) < 0) + if (!SSL_WRITE_ETM(s) && mac_size != 0) { + unsigned char *mac; + + if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) + || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); goto err; - SSL3_RECORD_add_length(&wr[j], mac_size); + } + } + + /* + * Reserve some bytes for any growth that may occur during encryption. + * This will be at most one cipher block or the tag length if using + * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. + */ + if(!WPACKET_reserve_bytes(thispkt, SSL_RT_MAX_CIPHER_BLOCK_SIZE, + NULL) + /* + * We also need next the amount of bytes written to this + * sub-packet + */ + || !WPACKET_get_length(thispkt, &len)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; } + /* Get a pointer to the start of this record excluding header */ + recordstart = WPACKET_get_curr(thispkt) - len; - SSL3_RECORD_set_data(&wr[j], outbuf[j]); - SSL3_RECORD_reset_input(&wr[j]); + SSL3_RECORD_set_data(thiswr, recordstart); + SSL3_RECORD_reset_input(thiswr); + SSL3_RECORD_set_length(thiswr, len); + } - if (eivlen) { - /* - * if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err; - */ - SSL3_RECORD_add_length(&wr[j], eivlen); - } + if (s->early_data_state == SSL_EARLY_DATA_WRITING + || s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY) { + /* + * We haven't actually negotiated the version yet, but we're trying to + * send early data - so we need to use the the tls13enc function. + */ + if (tls13_enc(s, wr, numpipes, 1) < 1) + goto err; + } else { + if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) + goto err; } - if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) - goto err; + for (j = 0; j < numpipes; j++) { + size_t origlen; + + thispkt = &pkt[j]; + thiswr = &wr[j]; - for (j=0; j < numpipes; j++) { - if (SSL_USE_ETM(s) && mac_size != 0) { - if (s->method->ssl3_enc->mac(s, &wr[j], - outbuf[j] + wr[j].length, 1) < 0) + /* Allocate bytes for the encryption overhead */ + if (!WPACKET_get_length(thispkt, &origlen) + /* Encryption should never shrink the data! */ + || origlen > thiswr->length + || (thiswr->length > origlen + && !WPACKET_allocate_bytes(thispkt, + thiswr->length - origlen, NULL))) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } + if (SSL_WRITE_ETM(s) && mac_size != 0) { + unsigned char *mac; + + if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) + || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); goto err; - SSL3_RECORD_add_length(&wr[j], mac_size); + } + SSL3_RECORD_add_length(thiswr, mac_size); } - /* record length after mac and block padding */ - s2n(SSL3_RECORD_get_length(&wr[j]), plen[j]); + if (!WPACKET_get_length(thispkt, &len) + || !WPACKET_close(thispkt)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } - if (s->msg_callback) - s->msg_callback(1, 0, SSL3_RT_HEADER, plen[j] - 5, 5, s, + if (s->msg_callback) { + recordstart = WPACKET_get_curr(thispkt) - len + - SSL3_RT_HEADER_LENGTH; + s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, + SSL3_RT_HEADER_LENGTH, s, s->msg_callback_arg); + if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { + unsigned char ctype = type; + + s->msg_callback(1, s->version, SSL3_RT_INNER_CONTENT_TYPE, + &ctype, 1, s, s->msg_callback_arg); + } + } + + if (!WPACKET_finish(thispkt)) { + SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); + goto err; + } + /* - * we should now have wr->data pointing to the encrypted data, which is - * wr->length long + * we should now have thiswr->data pointing to the encrypted data, which + * is thiswr->length long */ - SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for debugging */ - SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); + SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for + * debugging */ + SSL3_RECORD_add_length(thiswr, SSL3_RT_HEADER_LENGTH); if (create_empty_fragment) { /* @@ -963,16 +1025,15 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf, SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); goto err; } - return SSL3_RECORD_get_length(wr); + *written = SSL3_RECORD_get_length(thiswr); + return 1; } /* now let's set up wb */ SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], - prefix_len + SSL3_RECORD_get_length(&wr[j])); + prefix_len + SSL3_RECORD_get_length(thiswr)); } - - /* * memorize arguments so that ssl3_write_pending can detect bad write * retries later @@ -983,53 +1044,62 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf, s->rlayer.wpend_ret = totlen; /* we now just need to write the buffer */ - return ssl3_write_pending(s, type, buf, totlen); + return ssl3_write_pending(s, type, buf, totlen, written); err: + for (j = 0; j < wpinited; j++) + WPACKET_cleanup(&pkt[j]); return -1; } -/* if s->s3->wbuf.left != 0, we need to call this */ -int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, - unsigned int len) +/* if s->s3->wbuf.left != 0, we need to call this + * + * Return values are as per SSL_write() + */ +int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, + size_t *written) { int i; SSL3_BUFFER *wb = s->rlayer.wbuf; - unsigned int currbuf = 0; + size_t currbuf = 0; + size_t tmpwrit = 0; -/* XXXX */ - if ((s->rlayer.wpend_tot > (int)len) + if ((s->rlayer.wpend_tot > len) || ((s->rlayer.wpend_buf != buf) && !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) || (s->rlayer.wpend_type != type)) { SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); - return (-1); + return -1; } for (;;) { /* Loop until we find a buffer we haven't written out yet */ if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 - && currbuf < s->rlayer.numwpipes - 1) { + && currbuf < s->rlayer.numwpipes - 1) { currbuf++; continue; } clear_sys_error(); if (s->wbio != NULL) { s->rwstate = SSL_WRITING; - i = BIO_write(s->wbio, - (char *)&(SSL3_BUFFER_get_buf(&wb[currbuf])[ - SSL3_BUFFER_get_offset(&wb[currbuf])]), - (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); + /* TODO(size_t): Convert this call */ + i = BIO_write(s->wbio, (char *) + &(SSL3_BUFFER_get_buf(&wb[currbuf]) + [SSL3_BUFFER_get_offset(&wb[currbuf])]), + (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); + if (i >= 0) + tmpwrit = i; } else { SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); i = -1; } - if (i == SSL3_BUFFER_get_left(&wb[currbuf])) { + if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { SSL3_BUFFER_set_left(&wb[currbuf], 0); - SSL3_BUFFER_add_offset(&wb[currbuf], i); + SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); if (currbuf + 1 < s->rlayer.numwpipes) continue; s->rwstate = SSL_NOTHING; - return (s->rlayer.wpend_ret); + *written = s->rlayer.wpend_ret; + return 1; } else if (i <= 0) { if (SSL_IS_DTLS(s)) { /* @@ -1040,8 +1110,8 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, } return (i); } - SSL3_BUFFER_add_offset(&wb[currbuf], i); - SSL3_BUFFER_add_left(&wb[currbuf], -i); + SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); + SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); } } @@ -1075,10 +1145,10 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, * none of our business */ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, - int len, int peek) + size_t len, int peek, size_t *readbytes) { int al, i, j, ret; - unsigned int n, curr_rec, num_recs, read_bytes; + size_t n, curr_rec, num_recs, totalbytes; SSL3_RECORD *rr; SSL3_BUFFER *rbuf; void (*cb) (const SSL *ssl, int type2, int val) = NULL; @@ -1088,7 +1158,7 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, if (!SSL3_BUFFER_is_initialised(rbuf)) { /* Not initialized yet */ if (!ssl3_setup_read_buffer(s)) - return (-1); + return -1; } if ((type && (type != SSL3_RT_APPLICATION_DATA) @@ -1121,7 +1191,8 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, if (recvd_type != NULL) *recvd_type = SSL3_RT_HANDSHAKE; - return n; + *readbytes = n; + return 1; } /* @@ -1132,10 +1203,10 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, /* type == SSL3_RT_APPLICATION_DATA */ i = s->handshake_func(s); if (i < 0) - return (i); + return i; if (i == 0) { SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); - return (-1); + return -1; } } start: @@ -1156,7 +1227,7 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, if (num_recs == 0) { ret = ssl3_get_record(s); if (ret <= 0) - return (ret); + return ret; num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); if (num_recs == 0) { /* Shouldn't happen */ @@ -1165,10 +1236,10 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, goto f_err; } } - /* Skip over any records we have already used or are zero in length */ + /* Skip over any records we have already read */ for (curr_rec = 0; - curr_rec < num_recs && SSL3_RECORD_get_length(&rr[curr_rec]) == 0; - curr_rec++); + curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); + curr_rec++) ; if (curr_rec == num_recs) { RECORD_LAYER_set_numrpipes(&s->rlayer, 0); num_recs = 0; @@ -1177,6 +1248,14 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, } while (num_recs == 0); rr = &rr[curr_rec]; + /* + * Reset the count of consecutive warning alerts if we've got a non-empty + * record that isn't an alert. + */ + if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT + && SSL3_RECORD_get_length(rr) != 0) + s->rlayer.alert_count = 0; + /* we now have a packet which can be read and processed */ if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, @@ -1194,12 +1273,13 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { SSL3_RECORD_set_length(rr, 0); s->rwstate = SSL_NOTHING; - return (0); + return 0; } if (type == SSL3_RECORD_get_type(rr) - || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC - && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) { + || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC + && type == SSL3_RT_HANDSHAKE && recvd_type != NULL + && !SSL_IS_TLS13(s))) { /* * SSL3_RT_APPLICATION_DATA or * SSL3_RT_HANDSHAKE or @@ -1217,8 +1297,8 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, } if (type == SSL3_RT_HANDSHAKE - && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC - && s->rlayer.handshake_fragment_len > 0) { + && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC + && s->rlayer.handshake_fragment_len > 0) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); goto f_err; @@ -1227,24 +1307,29 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, if (recvd_type != NULL) *recvd_type = SSL3_RECORD_get_type(rr); - if (len <= 0) - return (len); + if (len == 0) + return 0; - read_bytes = 0; + totalbytes = 0; do { - if ((unsigned int)len - read_bytes > SSL3_RECORD_get_length(rr)) + if (len - totalbytes > SSL3_RECORD_get_length(rr)) n = SSL3_RECORD_get_length(rr); else - n = (unsigned int)len - read_bytes; + n = len - totalbytes; memcpy(buf, &(rr->data[rr->off]), n); buf += n; - if (!peek) { - SSL3_RECORD_add_length(rr, -n); + if (peek) { + /* Mark any zero length record as consumed CVE-2016-6305 */ + if (SSL3_RECORD_get_length(rr) == 0) + SSL3_RECORD_set_read(rr); + } else { + SSL3_RECORD_sub_length(rr, n); SSL3_RECORD_add_off(rr, n); if (SSL3_RECORD_get_length(rr) == 0) { s->rlayer.rstate = SSL_ST_READ_HEADER; SSL3_RECORD_set_off(rr, 0); + SSL3_RECORD_set_read(rr); } } if (SSL3_RECORD_get_length(rr) == 0 @@ -1252,14 +1337,19 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, curr_rec++; rr++; } - read_bytes += n; + totalbytes += n; } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs - && read_bytes < (unsigned int)len); + && totalbytes < len); + if (totalbytes == 0) { + /* We must have read empty records. Get more data */ + goto start; + } if (!peek && curr_rec == num_recs - && (s->mode & SSL_MODE_RELEASE_BUFFERS) - && SSL3_BUFFER_get_left(rbuf) == 0) + && (s->mode & SSL_MODE_RELEASE_BUFFERS) + && SSL3_BUFFER_get_left(rbuf) == 0) ssl3_release_read_buffer(s); - return read_bytes; + *readbytes = totalbytes; + return 1; } /* @@ -1268,12 +1358,6 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, * were actually expecting a CCS). */ - if (rr->type == SSL3_RT_HANDSHAKE && type == SSL3_RT_CHANGE_CIPHER_SPEC) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); - goto f_err; - } - /* * Lets just double check that we've not got an SSLv2 record */ @@ -1289,8 +1373,8 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, goto f_err; } - if(s->method->version == TLS_ANY_VERSION - && (s->server || rr->type != SSL3_RT_ALERT)) { + if (s->method->version == TLS_ANY_VERSION + && (s->server || rr->type != SSL3_RT_ALERT)) { /* * If we've got this far and still haven't decided on what version * we're using then this must be a client side alert we're dealing with @@ -1308,18 +1392,14 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, * that so that we can process the data at a fixed place. */ { - unsigned int dest_maxlen = 0; + size_t dest_maxlen = 0; unsigned char *dest = NULL; - unsigned int *dest_len = NULL; + size_t *dest_len = NULL; if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { dest_maxlen = sizeof s->rlayer.handshake_fragment; dest = s->rlayer.handshake_fragment; dest_len = &s->rlayer.handshake_fragment_len; - } else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { - dest_maxlen = sizeof s->rlayer.alert_fragment; - dest = s->rlayer.alert_fragment; - dest_len = &s->rlayer.alert_fragment_len; } if (dest_maxlen > 0) { @@ -1328,12 +1408,13 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, n = SSL3_RECORD_get_length(rr); /* available bytes */ /* now move 'n' bytes: */ - while (n-- > 0) { - dest[(*dest_len)++] = - SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]; - SSL3_RECORD_add_off(rr, 1); - SSL3_RECORD_add_length(rr, -1); - } + memcpy(dest + *dest_len, + SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n); + SSL3_RECORD_add_off(rr, n); + SSL3_RECORD_add_length(rr, -n); + *dest_len += n; + if (SSL3_RECORD_get_length(rr) == 0) + SSL3_RECORD_set_read(rr); if (*dest_len < dest_maxlen) goto start; /* fragment was too small */ @@ -1342,69 +1423,9 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, /*- * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; - * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT. * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) */ - /* If we are a client, check for an incoming 'Hello Request': */ - if ((!s->server) && - (s->rlayer.handshake_fragment_len >= 4) && - (s->rlayer.handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) && - (s->session != NULL) && (s->session->cipher != NULL)) { - s->rlayer.handshake_fragment_len = 0; - - if ((s->rlayer.handshake_fragment[1] != 0) || - (s->rlayer.handshake_fragment[2] != 0) || - (s->rlayer.handshake_fragment[3] != 0)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_BAD_HELLO_REQUEST); - goto f_err; - } - - if (s->msg_callback) - s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, - s->rlayer.handshake_fragment, 4, s, - s->msg_callback_arg); - - if (SSL_is_init_finished(s) && - !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && - !s->s3->renegotiate) { - ssl3_renegotiate(s); - if (ssl3_renegotiate_check(s)) { - i = s->handshake_func(s); - if (i < 0) - return (i); - if (i == 0) { - SSLerr(SSL_F_SSL3_READ_BYTES, - SSL_R_SSL_HANDSHAKE_FAILURE); - return (-1); - } - - if (!(s->mode & SSL_MODE_AUTO_RETRY)) { - if (SSL3_BUFFER_get_left(rbuf) == 0) { - /* no read-ahead left? */ - BIO *bio; - /* - * In the case where we try to read application data, - * but we trigger an SSL handshake, we return -1 with - * the retry option set. Otherwise renegotiation may - * cause nasty problems in the blocking world - */ - s->rwstate = SSL_READING; - bio = SSL_get_rbio(s); - BIO_clear_retry_flags(bio); - BIO_set_retry_read(bio); - return (-1); - } - } - } - } - /* - * we either finished a handshake or ignored the request, now try - * again to obtain the (application) data we were asked for - */ - goto start; - } /* * If we are a server and get a client hello when renegotiation isn't * allowed send back a no renegotiation alert and carry on. WARNING: @@ -1414,23 +1435,33 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, SSL_is_init_finished(s) && !s->s3->send_connection_binding && (s->version > SSL3_VERSION) && + !SSL_IS_TLS13(s) && (s->rlayer.handshake_fragment_len >= 4) && (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && (s->session != NULL) && (s->session->cipher != NULL) && - !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { + !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { SSL3_RECORD_set_length(rr, 0); + SSL3_RECORD_set_read(rr); ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); goto start; } - if (s->rlayer.alert_fragment_len >= 2) { - int alert_level = s->rlayer.alert_fragment[0]; - int alert_descr = s->rlayer.alert_fragment[1]; - - s->rlayer.alert_fragment_len = 0; + if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { + unsigned int alert_level, alert_descr; + unsigned char *alert_bytes = SSL3_RECORD_get_data(rr) + + SSL3_RECORD_get_off(rr); + PACKET alert; + + if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr)) + || !PACKET_get_1(&alert, &alert_level) + || !PACKET_get_1(&alert, &alert_descr) + || PACKET_remaining(&alert) != 0) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_INVALID_ALERT); + goto f_err; + } if (s->msg_callback) - s->msg_callback(0, s->version, SSL3_RT_ALERT, - s->rlayer.alert_fragment, 2, s, + s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, s->msg_callback_arg); if (s->info_callback != NULL) @@ -1445,27 +1476,41 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, if (alert_level == SSL3_AL_WARNING) { s->s3->warn_alert = alert_descr; + SSL3_RECORD_set_read(rr); + + s->rlayer.alert_count++; + if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); + goto f_err; + } + if (alert_descr == SSL_AD_CLOSE_NOTIFY) { s->shutdown |= SSL_RECEIVED_SHUTDOWN; - return (0); + return 0; + } + /* + * Apart from close_notify the only other warning alert in TLSv1.3 + * is user_cancelled - which we just ignore. + */ + if (SSL_IS_TLS13(s) && alert_descr != SSL_AD_USER_CANCELLED) { + al = SSL_AD_ILLEGAL_PARAMETER; + SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); + goto f_err; } /* * This is a warning but we receive it if we requested * renegotiation and the peer denied it. Terminate with a fatal - * alert because if application tried to renegotiatie it + * alert because if application tried to renegotiate it * presumably had a good reason and expects it to succeed. In * future we might have a renegotiation where we don't care if * the peer refused it where we carry on. */ - else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { + if (alert_descr == SSL_AD_NO_RENEGOTIATION) { al = SSL_AD_HANDSHAKE_FAILURE; SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); goto f_err; } -#ifdef SSL_AD_MISSING_SRP_USERNAME - else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME) - return (0); -#endif } else if (alert_level == SSL3_AL_FATAL) { char tmp[16]; @@ -1475,8 +1520,9 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); ERR_add_error_data(2, "SSL alert number ", tmp); s->shutdown |= SSL_RECEIVED_SHUTDOWN; - SSL_CTX_remove_session(s->ctx, s->session); - return (0); + SSL3_RECORD_set_read(rr); + SSL_CTX_remove_session(s->session_ctx, s->session); + return 0; } else { al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); @@ -1490,7 +1536,8 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, * shutdown */ s->rwstate = SSL_NOTHING; SSL3_RECORD_set_length(rr, 0); - return (0); + SSL3_RECORD_set_read(rr); + return 0; } if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { @@ -1500,24 +1547,32 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, } /* - * Unexpected handshake message (Client Hello, or protocol violation) + * Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or + * protocol violation) */ if ((s->rlayer.handshake_fragment_len >= 4) && !ossl_statem_get_in_handshake(s)) { - if (SSL_is_init_finished(s) && - !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) { - ossl_statem_set_in_init(s, 1); - s->renegotiate = 1; - s->new_session = 1; - } + int ined = (s->early_data_state == SSL_EARLY_DATA_READING); + + /* We found handshake data, so we're going back into init */ + ossl_statem_set_in_init(s, 1); + i = s->handshake_func(s); if (i < 0) - return (i); + return i; if (i == 0) { SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); - return (-1); + return -1; } + /* + * If we were actually trying to read early data and we found a + * handshake message, then we don't want to continue to try and read + * the application data any more. It won't be "early" now. + */ + if (ined) + return -1; + if (!(s->mode & SSL_MODE_AUTO_RETRY)) { if (SSL3_BUFFER_get_left(rbuf) == 0) { /* no read-ahead left? */ @@ -1532,7 +1587,7 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, bio = SSL_get_rbio(s); BIO_clear_retry_flags(bio); BIO_set_retry_read(bio); - return (-1); + return -1; } } goto start; @@ -1541,13 +1596,12 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, switch (SSL3_RECORD_get_type(rr)) { default: /* - * TLS up to v1.1 just ignores unknown message types: TLS v1.2 give - * an unexpected message alert. + * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but + * TLS 1.2 says you MUST send an unexpected message alert. We use the + * TLS 1.2 behaviour for all protocol versions to prevent issues where + * no progress is being made and the peer continually sends unrecognised + * record types, using up resources processing them. */ - if (s->version >= TLS1_VERSION && s->version <= TLS1_1_VERSION) { - SSL3_RECORD_set_length(rr, 0); - goto start; - } al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); goto f_err; @@ -1572,7 +1626,22 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, */ if (ossl_statem_app_data_allowed(s)) { s->s3->in_read_app_data = 2; - return (-1); + return -1; + } else if (ossl_statem_skip_early_data(s)) { + /* + * This can happen after a client sends a CH followed by early_data, + * but the server responds with a HelloRetryRequest. The server + * reads the next record from the client expecting to find a + * plaintext ClientHello but gets a record which appears to be + * application data. The trial decrypt "works" because null + * decryption was applied. We just skip it and move on to the next + * record. + */ + if (!early_data_count_ok(s, rr->length, + EARLY_DATA_CIPHERTEXT_OVERHEAD, &al)) + goto f_err; + SSL3_RECORD_set_read(rr); + goto start; } else { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); @@ -1583,7 +1652,7 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); - return (-1); + return -1; } void ssl3_record_sequence_update(unsigned char *seq) @@ -1609,7 +1678,7 @@ int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) /* * Returns the length in bytes of the current rrec */ -unsigned int RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) +size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) { return SSL3_RECORD_get_length(&rl->rrec[0]); }