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81c9ebd909
We had some temporary function pointers in OSSL_RECORD_METHOD which were only necessary during the process of refactoring the read record layer. These are no longer required so can be removed. Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18132)
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "../ssl_local.h"
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#include "record_local.h"
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void SSL3_BUFFER_set_data(SSL3_BUFFER *b, const unsigned char *d, size_t n)
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{
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if (d != NULL)
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memcpy(b->buf, d, n);
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b->left = n;
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b->offset = 0;
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}
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/*
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* Clear the contents of an SSL3_BUFFER but retain any memory allocated. Also
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* retains the default_len setting
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*/
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void SSL3_BUFFER_clear(SSL3_BUFFER *b)
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{
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b->offset = 0;
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b->left = 0;
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}
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void SSL3_BUFFER_release(SSL3_BUFFER *b)
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{
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OPENSSL_free(b->buf);
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b->buf = NULL;
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}
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int ssl3_setup_write_buffer(SSL_CONNECTION *s, size_t numwpipes, size_t len)
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{
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unsigned char *p;
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size_t align = 0, headerlen;
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SSL3_BUFFER *wb;
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size_t currpipe;
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s->rlayer.numwpipes = numwpipes;
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if (len == 0) {
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if (SSL_CONNECTION_IS_DTLS(s))
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headerlen = DTLS1_RT_HEADER_LENGTH + 1;
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else
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headerlen = SSL3_RT_HEADER_LENGTH;
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#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
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align = SSL3_ALIGN_PAYLOAD - 1;
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#endif
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len = ssl_get_max_send_fragment(s)
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+ SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
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#ifndef OPENSSL_NO_COMP
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if (ssl_allow_compression(s))
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len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
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#endif
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if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
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len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
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}
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wb = RECORD_LAYER_get_wbuf(&s->rlayer);
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for (currpipe = 0; currpipe < numwpipes; currpipe++) {
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SSL3_BUFFER *thiswb = &wb[currpipe];
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if (thiswb->len != len) {
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OPENSSL_free(thiswb->buf);
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thiswb->buf = NULL; /* force reallocation */
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}
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if (thiswb->buf == NULL) {
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if (s->wbio == NULL || !BIO_get_ktls_send(s->wbio)) {
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p = OPENSSL_malloc(len);
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if (p == NULL) {
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s->rlayer.numwpipes = currpipe;
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/*
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* We've got a malloc failure, and we're still initialising
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* buffers. We assume we're so doomed that we won't even be able
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* to send an alert.
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*/
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SSLfatal(s, SSL_AD_NO_ALERT, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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} else {
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p = NULL;
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}
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memset(thiswb, 0, sizeof(SSL3_BUFFER));
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thiswb->buf = p;
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thiswb->len = len;
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}
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}
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return 1;
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}
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int ssl3_setup_buffers(SSL_CONNECTION *s)
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{
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if (!ssl3_setup_write_buffer(s, 1, 0)) {
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/* SSLfatal() already called */
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return 0;
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}
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return 1;
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}
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int ssl3_release_write_buffer(SSL_CONNECTION *s)
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{
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SSL3_BUFFER *wb;
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size_t pipes;
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pipes = s->rlayer.numwpipes;
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while (pipes > 0) {
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wb = &RECORD_LAYER_get_wbuf(&s->rlayer)[pipes - 1];
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if (SSL3_BUFFER_is_app_buffer(wb))
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SSL3_BUFFER_set_app_buffer(wb, 0);
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else
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OPENSSL_free(wb->buf);
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wb->buf = NULL;
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pipes--;
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}
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s->rlayer.numwpipes = 0;
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return 1;
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}
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