2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include "../ssl_locl.h"
11 #include "record_locl.h"
13 void SSL3_BUFFER_set_data(SSL3_BUFFER *b, const unsigned char *d, size_t n)
22 * Clear the contents of an SSL3_BUFFER but retain any memory allocated. Also
23 * retains the default_len setting
25 void SSL3_BUFFER_clear(SSL3_BUFFER *b)
31 void SSL3_BUFFER_release(SSL3_BUFFER *b)
37 int ssl3_setup_read_buffer(SSL *s)
40 size_t len, align = 0, headerlen;
43 b = RECORD_LAYER_get_rbuf(&s->rlayer);
46 headerlen = DTLS1_RT_HEADER_LENGTH;
48 headerlen = SSL3_RT_HEADER_LENGTH;
50 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
51 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
55 len = SSL3_RT_MAX_PLAIN_LENGTH
56 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
57 #ifndef OPENSSL_NO_COMP
58 if (ssl_allow_compression(s))
59 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
61 if (b->default_len > len)
63 if ((p = OPENSSL_malloc(len)) == NULL)
69 RECORD_LAYER_set_packet(&s->rlayer, &(b->buf[0]));
73 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE);
77 int ssl3_setup_write_buffer(SSL *s, size_t numwpipes, size_t len)
80 size_t align = 0, headerlen;
84 s->rlayer.numwpipes = numwpipes;
88 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
90 headerlen = SSL3_RT_HEADER_LENGTH;
92 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
93 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
96 len = s->max_send_fragment
97 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
98 #ifndef OPENSSL_NO_COMP
99 if (ssl_allow_compression(s))
100 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
102 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
103 len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
106 wb = RECORD_LAYER_get_wbuf(&s->rlayer);
107 for (currpipe = 0; currpipe < numwpipes; currpipe++) {
108 SSL3_BUFFER *thiswb = &wb[currpipe];
110 if (thiswb->buf == NULL) {
111 p = OPENSSL_malloc(len);
113 s->rlayer.numwpipes = currpipe;
116 memset(thiswb, 0, sizeof(SSL3_BUFFER));
125 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE);
129 int ssl3_setup_buffers(SSL *s)
131 if (!ssl3_setup_read_buffer(s))
133 if (!ssl3_setup_write_buffer(s, 1, 0))
138 int ssl3_release_write_buffer(SSL *s)
143 pipes = s->rlayer.numwpipes;
145 wb = &RECORD_LAYER_get_wbuf(&s->rlayer)[pipes - 1];
147 OPENSSL_free(wb->buf);
151 s->rlayer.numwpipes = 0;
155 int ssl3_release_read_buffer(SSL *s)
159 b = RECORD_LAYER_get_rbuf(&s->rlayer);
160 OPENSSL_free(b->buf);