mirror of
https://github.com/openssl/openssl.git
synced 2024-12-09 05:51:54 +08:00
3e5826061b
These are similar to the helpers added in 95badfeb60
. I've adjusted
the arguments passed to ktls_check_supported_cipher and
ktls_configure_crypto so that FreeBSD and Linux can both use the same
signature to avoid OS-specific #ifdef's in libssl. This also required
moving the check on valid TLS versions into
ktls_check_supported_cipher for Linux. This has largely removed
OS-specific code and OS-specific #ifdef's for KTLS outside of
<internal/ktls.h>.
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12111)
879 lines
29 KiB
C
879 lines
29 KiB
C
/*
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* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright 2005 Nokia. 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 <stdio.h>
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#include "ssl_local.h"
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#include "record/record_local.h"
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#include "internal/ktls.h"
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#include "internal/cryptlib.h"
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#include <openssl/comp.h>
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#include <openssl/evp.h>
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#include <openssl/kdf.h>
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#include <openssl/rand.h>
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#include <openssl/obj_mac.h>
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#include <openssl/core_names.h>
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#include <openssl/trace.h>
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/* seed1 through seed5 are concatenated */
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static int tls1_PRF(SSL *s,
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const void *seed1, size_t seed1_len,
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const void *seed2, size_t seed2_len,
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const void *seed3, size_t seed3_len,
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const void *seed4, size_t seed4_len,
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const void *seed5, size_t seed5_len,
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const unsigned char *sec, size_t slen,
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unsigned char *out, size_t olen, int fatal)
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{
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const EVP_MD *md = ssl_prf_md(s);
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EVP_KDF *kdf;
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EVP_KDF_CTX *kctx = NULL;
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OSSL_PARAM params[8], *p = params;
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const char *mdname;
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if (md == NULL) {
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/* Should never happen */
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if (fatal)
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
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ERR_R_INTERNAL_ERROR);
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else
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SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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kdf = EVP_KDF_fetch(s->ctx->libctx, OSSL_KDF_NAME_TLS1_PRF, s->ctx->propq);
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if (kdf == NULL)
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goto err;
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kctx = EVP_KDF_CTX_new(kdf);
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EVP_KDF_free(kdf);
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if (kctx == NULL)
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goto err;
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mdname = EVP_MD_name(md);
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
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(char *)mdname, 0);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
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(unsigned char *)sec,
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(size_t)slen);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
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(void *)seed1, (size_t)seed1_len);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
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(void *)seed2, (size_t)seed2_len);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
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(void *)seed3, (size_t)seed3_len);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
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(void *)seed4, (size_t)seed4_len);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
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(void *)seed5, (size_t)seed5_len);
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*p = OSSL_PARAM_construct_end();
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if (EVP_KDF_CTX_set_params(kctx, params)
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&& EVP_KDF_derive(kctx, out, olen)) {
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EVP_KDF_CTX_free(kctx);
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return 1;
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}
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err:
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if (fatal)
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
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ERR_R_INTERNAL_ERROR);
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else
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SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
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EVP_KDF_CTX_free(kctx);
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return 0;
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}
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static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
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{
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int ret;
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/* Calls SSLfatal() as required */
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ret = tls1_PRF(s,
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TLS_MD_KEY_EXPANSION_CONST,
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TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3.server_random,
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SSL3_RANDOM_SIZE, s->s3.client_random, SSL3_RANDOM_SIZE,
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NULL, 0, NULL, 0, s->session->master_key,
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s->session->master_key_length, km, num, 1);
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return ret;
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}
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#ifndef OPENSSL_NO_KTLS
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/*
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* Count the number of records that were not processed yet from record boundary.
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*
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* This function assumes that there are only fully formed records read in the
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* record layer. If read_ahead is enabled, then this might be false and this
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* function will fail.
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*/
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# ifndef OPENSSL_NO_KTLS_RX
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static int count_unprocessed_records(SSL *s)
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{
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SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
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PACKET pkt, subpkt;
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int count = 0;
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if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
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return -1;
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while (PACKET_remaining(&pkt) > 0) {
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/* Skip record type and version */
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if (!PACKET_forward(&pkt, 3))
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return -1;
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/* Read until next record */
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if (PACKET_get_length_prefixed_2(&pkt, &subpkt))
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return -1;
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count += 1;
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}
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return count;
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}
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# endif
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#endif
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int tls_provider_set_tls_params(SSL *s, EVP_CIPHER_CTX *ctx,
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const EVP_CIPHER *ciph,
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const EVP_MD *md)
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{
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/*
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* Provided cipher, the TLS padding/MAC removal is performed provider
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* side so we need to tell the ctx about our TLS version and mac size
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*/
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OSSL_PARAM params[3], *pprm = params;
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size_t macsize = 0;
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int imacsize = -1;
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if ((EVP_CIPHER_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0
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/*
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* We look at s->ext.use_etm instead of SSL_READ_ETM() or
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* SSL_WRITE_ETM() because this test applies to both reading
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* and writing.
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*/
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&& !s->ext.use_etm)
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imacsize = EVP_MD_size(md);
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if (imacsize >= 0)
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macsize = (size_t)imacsize;
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*pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION,
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&s->version);
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*pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE,
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&macsize);
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*pprm = OSSL_PARAM_construct_end();
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if (!EVP_CIPHER_CTX_set_params(ctx, params)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_INTERNAL_ERROR);
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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 tls1_change_cipher_state(SSL *s, int which)
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{
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unsigned char *p, *mac_secret;
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unsigned char *ms, *key, *iv;
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EVP_CIPHER_CTX *dd;
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const EVP_CIPHER *c;
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#ifndef OPENSSL_NO_COMP
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const SSL_COMP *comp;
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#endif
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const EVP_MD *m;
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int mac_type;
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size_t *mac_secret_size;
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EVP_MD_CTX *mac_ctx;
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EVP_PKEY *mac_key;
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size_t n, i, j, k, cl;
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int reuse_dd = 0;
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#ifndef OPENSSL_NO_KTLS
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ktls_crypto_info_t crypto_info;
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unsigned char *rec_seq;
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void *rl_sequence;
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# ifndef OPENSSL_NO_KTLS_RX
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int count_unprocessed;
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int bit;
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# endif
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BIO *bio;
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#endif
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c = s->s3.tmp.new_sym_enc;
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m = s->s3.tmp.new_hash;
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mac_type = s->s3.tmp.new_mac_pkey_type;
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#ifndef OPENSSL_NO_COMP
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comp = s->s3.tmp.new_compression;
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#endif
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if (which & SSL3_CC_READ) {
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if (s->ext.use_etm)
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s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
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else
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s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
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if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
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s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
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else
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s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
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if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
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s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
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else
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s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
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if (s->enc_read_ctx != NULL) {
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reuse_dd = 1;
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} else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_MALLOC_FAILURE);
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goto err;
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} else {
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/*
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* make sure it's initialised in case we exit later with an error
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*/
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EVP_CIPHER_CTX_reset(s->enc_read_ctx);
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}
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dd = s->enc_read_ctx;
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mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
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if (mac_ctx == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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#ifndef OPENSSL_NO_COMP
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COMP_CTX_free(s->expand);
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s->expand = NULL;
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if (comp != NULL) {
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s->expand = COMP_CTX_new(comp->method);
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if (s->expand == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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SSL_F_TLS1_CHANGE_CIPHER_STATE,
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SSL_R_COMPRESSION_LIBRARY_ERROR);
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goto err;
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}
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}
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#endif
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/*
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* this is done by dtls1_reset_seq_numbers for DTLS
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*/
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if (!SSL_IS_DTLS(s))
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RECORD_LAYER_reset_read_sequence(&s->rlayer);
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mac_secret = &(s->s3.read_mac_secret[0]);
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mac_secret_size = &(s->s3.read_mac_secret_size);
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} else {
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s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
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if (s->ext.use_etm)
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s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
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else
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s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
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if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
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s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
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else
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s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
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if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
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s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
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else
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s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
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if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
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reuse_dd = 1;
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} else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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dd = s->enc_write_ctx;
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if (SSL_IS_DTLS(s)) {
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mac_ctx = EVP_MD_CTX_new();
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if (mac_ctx == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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s->write_hash = mac_ctx;
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} else {
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mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
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if (mac_ctx == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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}
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#ifndef OPENSSL_NO_COMP
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COMP_CTX_free(s->compress);
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s->compress = NULL;
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if (comp != NULL) {
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s->compress = COMP_CTX_new(comp->method);
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if (s->compress == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR,
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SSL_F_TLS1_CHANGE_CIPHER_STATE,
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SSL_R_COMPRESSION_LIBRARY_ERROR);
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goto err;
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}
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}
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#endif
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/*
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* this is done by dtls1_reset_seq_numbers for DTLS
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*/
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if (!SSL_IS_DTLS(s))
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RECORD_LAYER_reset_write_sequence(&s->rlayer);
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mac_secret = &(s->s3.write_mac_secret[0]);
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mac_secret_size = &(s->s3.write_mac_secret_size);
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}
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if (reuse_dd)
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EVP_CIPHER_CTX_reset(dd);
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p = s->s3.tmp.key_block;
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i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
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/* TODO(size_t): convert me */
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cl = EVP_CIPHER_key_length(c);
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j = cl;
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/* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
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/* If GCM/CCM mode only part of IV comes from PRF */
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if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
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k = EVP_GCM_TLS_FIXED_IV_LEN;
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else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
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k = EVP_CCM_TLS_FIXED_IV_LEN;
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else
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k = EVP_CIPHER_iv_length(c);
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if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
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(which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
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ms = &(p[0]);
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n = i + i;
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key = &(p[n]);
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n += j + j;
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iv = &(p[n]);
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n += k + k;
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} else {
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n = i;
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ms = &(p[n]);
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n += i + j;
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key = &(p[n]);
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n += j + k;
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iv = &(p[n]);
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n += k;
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}
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if (n > s->s3.tmp.key_block_length) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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memcpy(mac_secret, ms, i);
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if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
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if (mac_type == EVP_PKEY_HMAC) {
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mac_key = EVP_PKEY_new_raw_private_key_with_libctx(s->ctx->libctx,
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"HMAC",
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s->ctx->propq,
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mac_secret,
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*mac_secret_size);
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} else {
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/*
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* If its not HMAC then the only other types of MAC we support are
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* the GOST MACs, so we need to use the old style way of creating
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* a MAC key.
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*/
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mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
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(int)*mac_secret_size);
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}
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if (mac_key == NULL
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|| EVP_DigestSignInit_with_libctx(mac_ctx, NULL, EVP_MD_name(m),
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s->ctx->libctx, s->ctx->propq,
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mac_key) <= 0) {
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EVP_PKEY_free(mac_key);
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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EVP_PKEY_free(mac_key);
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}
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OSSL_TRACE_BEGIN(TLS) {
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BIO_printf(trc_out, "which = %04X, mac key:\n", which);
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BIO_dump_indent(trc_out, ms, i, 4);
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} OSSL_TRACE_END(TLS);
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if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
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if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
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|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
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iv)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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} else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
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int taglen;
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if (s->s3.tmp.
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new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
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taglen = EVP_CCM8_TLS_TAG_LEN;
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else
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taglen = EVP_CCM_TLS_TAG_LEN;
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if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
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|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
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|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
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|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
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|| !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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} else {
|
|
if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
}
|
|
/* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
|
|
if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
|
|
&& !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
|
|
(int)*mac_secret_size, mac_secret)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
if (EVP_CIPHER_provider(c) != NULL
|
|
&& !tls_provider_set_tls_params(s, dd, c, m)) {
|
|
/* SSLfatal already called */
|
|
goto err;
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_KTLS
|
|
if (s->compress)
|
|
goto skip_ktls;
|
|
|
|
if (((which & SSL3_CC_READ) && (s->mode & SSL_MODE_NO_KTLS_RX))
|
|
|| ((which & SSL3_CC_WRITE) && (s->mode & SSL_MODE_NO_KTLS_TX)))
|
|
goto skip_ktls;
|
|
|
|
/* ktls supports only the maximum fragment size */
|
|
if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
|
|
goto skip_ktls;
|
|
|
|
/* check that cipher is supported */
|
|
if (!ktls_check_supported_cipher(s, c, dd))
|
|
goto skip_ktls;
|
|
|
|
if (which & SSL3_CC_WRITE)
|
|
bio = s->wbio;
|
|
else
|
|
bio = s->rbio;
|
|
|
|
if (!ossl_assert(bio != NULL)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
/* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
|
|
if (which & SSL3_CC_WRITE) {
|
|
if (BIO_flush(bio) <= 0)
|
|
goto skip_ktls;
|
|
}
|
|
|
|
/* ktls doesn't support renegotiation */
|
|
if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
|
|
(BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
|
|
SSLfatal(s, SSL_AD_NO_RENEGOTIATION, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if (which & SSL3_CC_WRITE)
|
|
rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
|
|
else
|
|
rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
|
|
|
|
if (!ktls_configure_crypto(s, c, dd, rl_sequence, &crypto_info, &rec_seq,
|
|
iv, key, ms, *mac_secret_size))
|
|
goto skip_ktls;
|
|
|
|
if (which & SSL3_CC_READ) {
|
|
# ifndef OPENSSL_NO_KTLS_RX
|
|
count_unprocessed = count_unprocessed_records(s);
|
|
if (count_unprocessed < 0)
|
|
goto skip_ktls;
|
|
|
|
/* increment the crypto_info record sequence */
|
|
while (count_unprocessed) {
|
|
for (bit = 7; bit >= 0; bit--) { /* increment */
|
|
++rec_seq[bit];
|
|
if (rec_seq[bit] != 0)
|
|
break;
|
|
}
|
|
count_unprocessed--;
|
|
}
|
|
# else
|
|
goto skip_ktls;
|
|
# endif
|
|
}
|
|
|
|
/* ktls works with user provided buffers directly */
|
|
if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
|
|
if (which & SSL3_CC_WRITE)
|
|
ssl3_release_write_buffer(s);
|
|
SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
|
|
}
|
|
|
|
skip_ktls:
|
|
#endif /* OPENSSL_NO_KTLS */
|
|
s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
|
|
|
|
OSSL_TRACE_BEGIN(TLS) {
|
|
BIO_printf(trc_out, "which = %04X, key:\n", which);
|
|
BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
|
|
BIO_printf(trc_out, "iv:\n");
|
|
BIO_dump_indent(trc_out, iv, k, 4);
|
|
} OSSL_TRACE_END(TLS);
|
|
|
|
return 1;
|
|
err:
|
|
return 0;
|
|
}
|
|
|
|
int tls1_setup_key_block(SSL *s)
|
|
{
|
|
unsigned char *p;
|
|
const EVP_CIPHER *c;
|
|
const EVP_MD *hash;
|
|
SSL_COMP *comp;
|
|
int mac_type = NID_undef;
|
|
size_t num, mac_secret_size = 0;
|
|
int ret = 0;
|
|
|
|
if (s->s3.tmp.key_block_length != 0)
|
|
return 1;
|
|
|
|
if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
|
|
&mac_secret_size, &comp, s->ext.use_etm)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
|
|
SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
|
|
return 0;
|
|
}
|
|
|
|
ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
|
|
s->s3.tmp.new_sym_enc = c;
|
|
ssl_evp_md_free(s->s3.tmp.new_hash);
|
|
s->s3.tmp.new_hash = hash;
|
|
s->s3.tmp.new_mac_pkey_type = mac_type;
|
|
s->s3.tmp.new_mac_secret_size = mac_secret_size;
|
|
num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
|
|
num *= 2;
|
|
|
|
ssl3_cleanup_key_block(s);
|
|
|
|
if ((p = OPENSSL_malloc(num)) == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
s->s3.tmp.key_block_length = num;
|
|
s->s3.tmp.key_block = p;
|
|
|
|
OSSL_TRACE_BEGIN(TLS) {
|
|
BIO_printf(trc_out, "client random\n");
|
|
BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
|
|
BIO_printf(trc_out, "server random\n");
|
|
BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
|
|
BIO_printf(trc_out, "master key\n");
|
|
BIO_dump_indent(trc_out,
|
|
s->session->master_key,
|
|
s->session->master_key_length, 4);
|
|
} OSSL_TRACE_END(TLS);
|
|
|
|
if (!tls1_generate_key_block(s, p, num)) {
|
|
/* SSLfatal() already called */
|
|
goto err;
|
|
}
|
|
|
|
OSSL_TRACE_BEGIN(TLS) {
|
|
BIO_printf(trc_out, "key block\n");
|
|
BIO_dump_indent(trc_out, p, num, 4);
|
|
} OSSL_TRACE_END(TLS);
|
|
|
|
if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
|
|
&& s->method->version <= TLS1_VERSION) {
|
|
/*
|
|
* enable vulnerability countermeasure for CBC ciphers with known-IV
|
|
* problem (http://www.openssl.org/~bodo/tls-cbc.txt)
|
|
*/
|
|
s->s3.need_empty_fragments = 1;
|
|
|
|
if (s->session->cipher != NULL) {
|
|
if (s->session->cipher->algorithm_enc == SSL_eNULL)
|
|
s->s3.need_empty_fragments = 0;
|
|
|
|
#ifndef OPENSSL_NO_RC4
|
|
if (s->session->cipher->algorithm_enc == SSL_RC4)
|
|
s->s3.need_empty_fragments = 0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
ret = 1;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
|
|
unsigned char *out)
|
|
{
|
|
size_t hashlen;
|
|
unsigned char hash[EVP_MAX_MD_SIZE];
|
|
size_t finished_size = TLS1_FINISH_MAC_LENGTH;
|
|
|
|
if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
|
|
finished_size = 32;
|
|
|
|
if (!ssl3_digest_cached_records(s, 0)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
|
|
s->session->master_key, s->session->master_key_length,
|
|
out, finished_size, 1)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
OPENSSL_cleanse(hash, hashlen);
|
|
return finished_size;
|
|
}
|
|
|
|
int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
|
|
size_t len, size_t *secret_size)
|
|
{
|
|
if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
|
|
unsigned char hash[EVP_MAX_MD_SIZE * 2];
|
|
size_t hashlen;
|
|
/*
|
|
* Digest cached records keeping record buffer (if present): this won't
|
|
* affect client auth because we're freezing the buffer at the same
|
|
* point (after client key exchange and before certificate verify)
|
|
*/
|
|
if (!ssl3_digest_cached_records(s, 1)
|
|
|| !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
OSSL_TRACE_BEGIN(TLS) {
|
|
BIO_printf(trc_out, "Handshake hashes:\n");
|
|
BIO_dump(trc_out, (char *)hash, hashlen);
|
|
} OSSL_TRACE_END(TLS);
|
|
if (!tls1_PRF(s,
|
|
TLS_MD_EXTENDED_MASTER_SECRET_CONST,
|
|
TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
|
|
hash, hashlen,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
NULL, 0, p, len, out,
|
|
SSL3_MASTER_SECRET_SIZE, 1)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
OPENSSL_cleanse(hash, hashlen);
|
|
} else {
|
|
if (!tls1_PRF(s,
|
|
TLS_MD_MASTER_SECRET_CONST,
|
|
TLS_MD_MASTER_SECRET_CONST_SIZE,
|
|
s->s3.client_random, SSL3_RANDOM_SIZE,
|
|
NULL, 0,
|
|
s->s3.server_random, SSL3_RANDOM_SIZE,
|
|
NULL, 0, p, len, out,
|
|
SSL3_MASTER_SECRET_SIZE, 1)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
OSSL_TRACE_BEGIN(TLS) {
|
|
BIO_printf(trc_out, "Premaster Secret:\n");
|
|
BIO_dump_indent(trc_out, p, len, 4);
|
|
BIO_printf(trc_out, "Client Random:\n");
|
|
BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
|
|
BIO_printf(trc_out, "Server Random:\n");
|
|
BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
|
|
BIO_printf(trc_out, "Master Secret:\n");
|
|
BIO_dump_indent(trc_out,
|
|
s->session->master_key,
|
|
SSL3_MASTER_SECRET_SIZE, 4);
|
|
} OSSL_TRACE_END(TLS);
|
|
|
|
*secret_size = SSL3_MASTER_SECRET_SIZE;
|
|
return 1;
|
|
}
|
|
|
|
int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
|
|
const char *label, size_t llen,
|
|
const unsigned char *context,
|
|
size_t contextlen, int use_context)
|
|
{
|
|
unsigned char *val = NULL;
|
|
size_t vallen = 0, currentvalpos;
|
|
int rv;
|
|
|
|
/*
|
|
* construct PRF arguments we construct the PRF argument ourself rather
|
|
* than passing separate values into the TLS PRF to ensure that the
|
|
* concatenation of values does not create a prohibited label.
|
|
*/
|
|
vallen = llen + SSL3_RANDOM_SIZE * 2;
|
|
if (use_context) {
|
|
vallen += 2 + contextlen;
|
|
}
|
|
|
|
val = OPENSSL_malloc(vallen);
|
|
if (val == NULL)
|
|
goto err2;
|
|
currentvalpos = 0;
|
|
memcpy(val + currentvalpos, (unsigned char *)label, llen);
|
|
currentvalpos += llen;
|
|
memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
|
|
currentvalpos += SSL3_RANDOM_SIZE;
|
|
memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
|
|
currentvalpos += SSL3_RANDOM_SIZE;
|
|
|
|
if (use_context) {
|
|
val[currentvalpos] = (contextlen >> 8) & 0xff;
|
|
currentvalpos++;
|
|
val[currentvalpos] = contextlen & 0xff;
|
|
currentvalpos++;
|
|
if ((contextlen > 0) || (context != NULL)) {
|
|
memcpy(val + currentvalpos, context, contextlen);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
|
|
* label len) = 15, so size of val > max(prohibited label len) = 15 and
|
|
* the comparisons won't have buffer overflow
|
|
*/
|
|
if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
|
|
TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
|
|
TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
|
|
TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
|
|
TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
|
|
TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
|
|
goto err1;
|
|
|
|
rv = tls1_PRF(s,
|
|
val, vallen,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
s->session->master_key, s->session->master_key_length,
|
|
out, olen, 0);
|
|
|
|
goto ret;
|
|
err1:
|
|
SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
|
|
rv = 0;
|
|
goto ret;
|
|
err2:
|
|
SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
|
|
rv = 0;
|
|
ret:
|
|
OPENSSL_clear_free(val, vallen);
|
|
return rv;
|
|
}
|
|
|
|
int tls1_alert_code(int code)
|
|
{
|
|
switch (code) {
|
|
case SSL_AD_CLOSE_NOTIFY:
|
|
return SSL3_AD_CLOSE_NOTIFY;
|
|
case SSL_AD_UNEXPECTED_MESSAGE:
|
|
return SSL3_AD_UNEXPECTED_MESSAGE;
|
|
case SSL_AD_BAD_RECORD_MAC:
|
|
return SSL3_AD_BAD_RECORD_MAC;
|
|
case SSL_AD_DECRYPTION_FAILED:
|
|
return TLS1_AD_DECRYPTION_FAILED;
|
|
case SSL_AD_RECORD_OVERFLOW:
|
|
return TLS1_AD_RECORD_OVERFLOW;
|
|
case SSL_AD_DECOMPRESSION_FAILURE:
|
|
return SSL3_AD_DECOMPRESSION_FAILURE;
|
|
case SSL_AD_HANDSHAKE_FAILURE:
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
|
case SSL_AD_NO_CERTIFICATE:
|
|
return -1;
|
|
case SSL_AD_BAD_CERTIFICATE:
|
|
return SSL3_AD_BAD_CERTIFICATE;
|
|
case SSL_AD_UNSUPPORTED_CERTIFICATE:
|
|
return SSL3_AD_UNSUPPORTED_CERTIFICATE;
|
|
case SSL_AD_CERTIFICATE_REVOKED:
|
|
return SSL3_AD_CERTIFICATE_REVOKED;
|
|
case SSL_AD_CERTIFICATE_EXPIRED:
|
|
return SSL3_AD_CERTIFICATE_EXPIRED;
|
|
case SSL_AD_CERTIFICATE_UNKNOWN:
|
|
return SSL3_AD_CERTIFICATE_UNKNOWN;
|
|
case SSL_AD_ILLEGAL_PARAMETER:
|
|
return SSL3_AD_ILLEGAL_PARAMETER;
|
|
case SSL_AD_UNKNOWN_CA:
|
|
return TLS1_AD_UNKNOWN_CA;
|
|
case SSL_AD_ACCESS_DENIED:
|
|
return TLS1_AD_ACCESS_DENIED;
|
|
case SSL_AD_DECODE_ERROR:
|
|
return TLS1_AD_DECODE_ERROR;
|
|
case SSL_AD_DECRYPT_ERROR:
|
|
return TLS1_AD_DECRYPT_ERROR;
|
|
case SSL_AD_EXPORT_RESTRICTION:
|
|
return TLS1_AD_EXPORT_RESTRICTION;
|
|
case SSL_AD_PROTOCOL_VERSION:
|
|
return TLS1_AD_PROTOCOL_VERSION;
|
|
case SSL_AD_INSUFFICIENT_SECURITY:
|
|
return TLS1_AD_INSUFFICIENT_SECURITY;
|
|
case SSL_AD_INTERNAL_ERROR:
|
|
return TLS1_AD_INTERNAL_ERROR;
|
|
case SSL_AD_USER_CANCELLED:
|
|
return TLS1_AD_USER_CANCELLED;
|
|
case SSL_AD_NO_RENEGOTIATION:
|
|
return TLS1_AD_NO_RENEGOTIATION;
|
|
case SSL_AD_UNSUPPORTED_EXTENSION:
|
|
return TLS1_AD_UNSUPPORTED_EXTENSION;
|
|
case SSL_AD_CERTIFICATE_UNOBTAINABLE:
|
|
return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
|
|
case SSL_AD_UNRECOGNIZED_NAME:
|
|
return TLS1_AD_UNRECOGNIZED_NAME;
|
|
case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
|
|
return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
|
|
case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
|
|
return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
|
|
case SSL_AD_UNKNOWN_PSK_IDENTITY:
|
|
return TLS1_AD_UNKNOWN_PSK_IDENTITY;
|
|
case SSL_AD_INAPPROPRIATE_FALLBACK:
|
|
return TLS1_AD_INAPPROPRIATE_FALLBACK;
|
|
case SSL_AD_NO_APPLICATION_PROTOCOL:
|
|
return TLS1_AD_NO_APPLICATION_PROTOCOL;
|
|
case SSL_AD_CERTIFICATE_REQUIRED:
|
|
return SSL_AD_HANDSHAKE_FAILURE;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|