Add GCD testing infrastructure.
[openssl.git] / ssl / t1_enc.c
index 46895ef..64806a3 100644 (file)
 /*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2005 Nokia. All rights reserved.
  *
- * Licensed under the OpenSSL license (the "License").  You may not use
+ * Licensed under the Apache License 2.0 (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
  */
 
-/* ====================================================================
- * Copyright 2005 Nokia. All rights reserved.
- *
- * The portions of the attached software ("Contribution") is developed by
- * Nokia Corporation and is licensed pursuant to the OpenSSL open source
- * license.
- *
- * The Contribution, originally written by Mika Kousa and Pasi Eronen of
- * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
- * support (see RFC 4279) to OpenSSL.
- *
- * No patent licenses or other rights except those expressly stated in
- * the OpenSSL open source license shall be deemed granted or received
- * expressly, by implication, estoppel, or otherwise.
- *
- * No assurances are provided by Nokia that the Contribution does not
- * infringe the patent or other intellectual property rights of any third
- * party or that the license provides you with all the necessary rights
- * to make use of the Contribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
- * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
- * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
- * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
- * OTHERWISE.
- */
-
 #include <stdio.h>
-#include "ssl_locl.h"
+#include "ssl_local.h"
+#include "record/record_local.h"
+#include "internal/ktls.h"
+#include "internal/cryptlib.h"
 #include <openssl/comp.h>
 #include <openssl/evp.h>
 #include <openssl/kdf.h>
 #include <openssl/rand.h>
+#include <openssl/obj_mac.h>
+#include <openssl/core_names.h>
+#include <openssl/trace.h>
 
 /* seed1 through seed5 are concatenated */
 static int tls1_PRF(SSL *s,
-                    const void *seed1, int seed1_len,
-                    const void *seed2, int seed2_len,
-                    const void *seed3, int seed3_len,
-                    const void *seed4, int seed4_len,
-                    const void *seed5, int seed5_len,
-                    const unsigned char *sec, int slen,
-                    unsigned char *out, int olen)
+                    const void *seed1, size_t seed1_len,
+                    const void *seed2, size_t seed2_len,
+                    const void *seed3, size_t seed3_len,
+                    const void *seed4, size_t seed4_len,
+                    const void *seed5, size_t seed5_len,
+                    const unsigned char *sec, size_t slen,
+                    unsigned char *out, size_t olen, int fatal)
 {
     const EVP_MD *md = ssl_prf_md(s);
-    EVP_PKEY_CTX *pctx = NULL;
-
-    int ret = 0;
-    size_t outlen = olen;
+    EVP_KDF *kdf;
+    EVP_KDF_CTX *kctx = NULL;
+    OSSL_PARAM params[8], *p = params;
+    const char *mdname;
 
     if (md == NULL) {
         /* Should never happen */
-        SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
+        if (fatal)
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
+                     ERR_R_INTERNAL_ERROR);
+        else
+            SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
         return 0;
     }
-    pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL);
-    if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0
-        || EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0
-        || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, slen) <= 0)
+    kdf = EVP_KDF_fetch(NULL, OSSL_KDF_NAME_TLS1_PRF, NULL);
+    if (kdf == NULL)
         goto err;
-
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, seed1_len) <= 0)
-        goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, seed2_len) <= 0)
-        goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, seed3_len) <= 0)
-        goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, seed4_len) <= 0)
-        goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, seed5_len) <= 0)
-        goto err;
-
-    if (EVP_PKEY_derive(pctx, out, &outlen) <= 0)
+    kctx = EVP_KDF_CTX_new(kdf);
+    EVP_KDF_free(kdf);
+    if (kctx == NULL)
         goto err;
-    ret = 1;
+    mdname = EVP_MD_name(md);
+    *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
+                                            (char *)mdname, strlen(mdname) + 1);
+    *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
+                                             (unsigned char *)sec,
+                                             (size_t)slen);
+    *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+                                             (void *)seed1, (size_t)seed1_len);
+    *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+                                             (void *)seed2, (size_t)seed2_len);
+    *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+                                             (void *)seed3, (size_t)seed3_len);
+    *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+                                             (void *)seed4, (size_t)seed4_len);
+    *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+                                             (void *)seed5, (size_t)seed5_len);
+    *p = OSSL_PARAM_construct_end();
+    if (EVP_KDF_CTX_set_params(kctx, params)
+            && EVP_KDF_derive(kctx, out, olen)) {
+        EVP_KDF_CTX_free(kctx);
+        return 1;
+    }
 
  err:
-    EVP_PKEY_CTX_free(pctx);
-    return ret;
+    if (fatal)
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
+                 ERR_R_INTERNAL_ERROR);
+    else
+        SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
+    EVP_KDF_CTX_free(kctx);
+    return 0;
 }
 
-/* TODO(size_t): convert me */
 static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
 {
     int ret;
+
+    /* Calls SSLfatal() as required */
     ret = tls1_PRF(s,
                    TLS_MD_KEY_EXPANSION_CONST,
-                   TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random,
-                   SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE,
+                   TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3.server_random,
+                   SSL3_RANDOM_SIZE, s->s3.client_random, SSL3_RANDOM_SIZE,
                    NULL, 0, NULL, 0, s->session->master_key,
-                   s->session->master_key_length, km, num);
+                   s->session->master_key_length, km, num, 1);
 
     return ret;
 }
 
+#ifndef OPENSSL_NO_KTLS
+ /*
+  * Count the number of records that were not processed yet from record boundary.
+  *
+  * This function assumes that there are only fully formed records read in the
+  * record layer. If read_ahead is enabled, then this might be false and this
+  * function will fail.
+  */
+static int count_unprocessed_records(SSL *s)
+{
+    SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
+    PACKET pkt, subpkt;
+    int count = 0;
+
+    if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
+        return -1;
+
+    while (PACKET_remaining(&pkt) > 0) {
+        /* Skip record type and version */
+        if (!PACKET_forward(&pkt, 3))
+            return -1;
+
+        /* Read until next record */
+        if (PACKET_get_length_prefixed_2(&pkt, &subpkt))
+            return -1;
+
+        count += 1;
+    }
+
+    return count;
+}
+#endif
+
 int tls1_change_cipher_state(SSL *s, int which)
 {
     unsigned char *p, *mac_secret;
-    unsigned char tmp1[EVP_MAX_KEY_LENGTH];
-    unsigned char tmp2[EVP_MAX_KEY_LENGTH];
-    unsigned char iv1[EVP_MAX_IV_LENGTH * 2];
-    unsigned char iv2[EVP_MAX_IV_LENGTH * 2];
     unsigned char *ms, *key, *iv;
     EVP_CIPHER_CTX *dd;
     const EVP_CIPHER *c;
@@ -122,42 +150,61 @@ int tls1_change_cipher_state(SSL *s, int which)
     EVP_PKEY *mac_key;
     size_t n, i, j, k, cl;
     int reuse_dd = 0;
+#ifndef OPENSSL_NO_KTLS
+    struct tls12_crypto_info_aes_gcm_128 crypto_info;
+    BIO *bio;
+    unsigned char geniv[12];
+    int count_unprocessed;
+    int bit;
+#endif
 
-    c = s->s3->tmp.new_sym_enc;
-    m = s->s3->tmp.new_hash;
-    mac_type = s->s3->tmp.new_mac_pkey_type;
+    c = s->s3.tmp.new_sym_enc;
+    m = s->s3.tmp.new_hash;
+    mac_type = s->s3.tmp.new_mac_pkey_type;
 #ifndef OPENSSL_NO_COMP
-    comp = s->s3->tmp.new_compression;
+    comp = s->s3.tmp.new_compression;
 #endif
 
     if (which & SSL3_CC_READ) {
-        if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
+        if (s->ext.use_etm)
+            s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
+        else
+            s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
+
+        if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
             s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
         else
             s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 
-        if (s->enc_read_ctx != NULL)
+        if (s->enc_read_ctx != NULL) {
             reuse_dd = 1;
-        else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL)
+        } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                     ERR_R_MALLOC_FAILURE);
             goto err;
-        else
+        } else {
             /*
              * make sure it's initialised in case we exit later with an error
              */
             EVP_CIPHER_CTX_reset(s->enc_read_ctx);
+        }
         dd = s->enc_read_ctx;
         mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
-        if (mac_ctx == NULL)
+        if (mac_ctx == NULL) {
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                     ERR_R_INTERNAL_ERROR);
             goto err;
+        }
 #ifndef OPENSSL_NO_COMP
         COMP_CTX_free(s->expand);
         s->expand = NULL;
         if (comp != NULL) {
             s->expand = COMP_CTX_new(comp->method);
             if (s->expand == NULL) {
-                SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
-                       SSL_R_COMPRESSION_LIBRARY_ERROR);
-                goto err2;
+                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                         SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                         SSL_R_COMPRESSION_LIBRARY_ERROR);
+                goto err;
             }
         }
 #endif
@@ -166,27 +213,44 @@ int tls1_change_cipher_state(SSL *s, int which)
          */
         if (!SSL_IS_DTLS(s))
             RECORD_LAYER_reset_read_sequence(&s->rlayer);
-        mac_secret = &(s->s3->read_mac_secret[0]);
-        mac_secret_size = &(s->s3->read_mac_secret_size);
+        mac_secret = &(s->s3.read_mac_secret[0]);
+        mac_secret_size = &(s->s3.read_mac_secret_size);
     } else {
-        if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
+        s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
+        if (s->ext.use_etm)
+            s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
+        else
+            s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
+
+        if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
             s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
         else
             s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
-        if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
+        if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
             reuse_dd = 1;
-        else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL)
+        } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                     ERR_R_MALLOC_FAILURE);
             goto err;
+        }
         dd = s->enc_write_ctx;
         if (SSL_IS_DTLS(s)) {
             mac_ctx = EVP_MD_CTX_new();
-            if (mac_ctx == NULL)
+            if (mac_ctx == NULL) {
+                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                         SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                         ERR_R_MALLOC_FAILURE);
                 goto err;
+            }
             s->write_hash = mac_ctx;
         } else {
             mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
-            if (mac_ctx == NULL)
+            if (mac_ctx == NULL) {
+                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                         SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                         ERR_R_MALLOC_FAILURE);
                 goto err;
+            }
         }
 #ifndef OPENSSL_NO_COMP
         COMP_CTX_free(s->compress);
@@ -194,9 +258,10 @@ int tls1_change_cipher_state(SSL *s, int which)
         if (comp != NULL) {
             s->compress = COMP_CTX_new(comp->method);
             if (s->compress == NULL) {
-                SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
-                       SSL_R_COMPRESSION_LIBRARY_ERROR);
-                goto err2;
+                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                         SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                        SSL_R_COMPRESSION_LIBRARY_ERROR);
+                goto err;
             }
         }
 #endif
@@ -205,15 +270,15 @@ int tls1_change_cipher_state(SSL *s, int which)
          */
         if (!SSL_IS_DTLS(s))
             RECORD_LAYER_reset_write_sequence(&s->rlayer);
-        mac_secret = &(s->s3->write_mac_secret[0]);
-        mac_secret_size = &(s->s3->write_mac_secret_size);
+        mac_secret = &(s->s3.write_mac_secret[0]);
+        mac_secret_size = &(s->s3.write_mac_secret_size);
     }
 
     if (reuse_dd)
         EVP_CIPHER_CTX_reset(dd);
 
-    p = s->s3->tmp.key_block;
-    i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;
+    p = s->s3.tmp.key_block;
+    i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
 
     /* TODO(size_t): convert me */
     cl = EVP_CIPHER_key_length(c);
@@ -244,116 +309,174 @@ int tls1_change_cipher_state(SSL *s, int which)
         n += k;
     }
 
-    if (n > s->s3->tmp.key_block_length) {
-        SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
-        goto err2;
+    if (n > s->s3.tmp.key_block_length) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                 ERR_R_INTERNAL_ERROR);
+        goto err;
     }
 
     memcpy(mac_secret, ms, i);
 
     if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
-        mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
-                                       mac_secret, *mac_secret_size);
+        /* TODO(size_t): Convert this function */
+        mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
+                                               (int)*mac_secret_size);
         if (mac_key == NULL
             || EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) {
             EVP_PKEY_free(mac_key);
-            SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
-            goto err2;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                     ERR_R_INTERNAL_ERROR);
+            goto err;
         }
         EVP_PKEY_free(mac_key);
     }
-#ifdef SSL_DEBUG
-    printf("which = %04X\nmac key=", which);
-    {
-        int z;
-        for (z = 0; z < i; z++)
-            printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
-    }
-#endif
+
+    OSSL_TRACE_BEGIN(TLS) {
+        BIO_printf(trc_out, "which = %04X, mac key:\n", which);
+        BIO_dump_indent(trc_out, ms, i, 4);
+    } OSSL_TRACE_END(TLS);
 
     if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
         if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
-            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) {
-            SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
-            goto err2;
+            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
+                                    iv)) {
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                     ERR_R_INTERNAL_ERROR);
+            goto err;
         }
     } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
         int taglen;
-        if (s->s3->tmp.
+        if (s->s3.tmp.
             new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
-            taglen = 8;
+            taglen = EVP_CCM8_TLS_TAG_LEN;
         else
-            taglen = 16;
+            taglen = EVP_CCM_TLS_TAG_LEN;
         if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
-            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, k, iv)
+            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
             || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
-            SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
-            goto err2;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                     ERR_R_INTERNAL_ERROR);
+            goto err;
         }
     } else {
         if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
-            SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
-            goto err2;
+            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,
-                                *mac_secret_size, mac_secret)) {
-        SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
-        goto err2;
+                                (int)*mac_secret_size, mac_secret)) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
+                 ERR_R_INTERNAL_ERROR);
+        goto err;
     }
-#ifdef OPENSSL_SSL_TRACE_CRYPTO
-    if (s->msg_callback) {
-        int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;
-        if (*mac_secret_size)
-            s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
-                            mac_secret, *mac_secret_size,
-                            s, s->msg_callback_arg);
-        if (c->key_len)
-            s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
-                            key, c->key_len, s, s->msg_callback_arg);
-        if (k) {
-            if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
-                wh |= TLS1_RT_CRYPTO_FIXED_IV;
-            else
-                wh |= TLS1_RT_CRYPTO_IV;
-            s->msg_callback(2, s->version, wh, iv, k, s, s->msg_callback_arg);
-        }
+#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 AES_GCM_128 */
+    if (EVP_CIPHER_nid(c) != NID_aes_128_gcm
+        || EVP_CIPHER_mode(c) != EVP_CIPH_GCM_MODE
+        || EVP_CIPHER_key_length(c) != TLS_CIPHER_AES_GCM_128_KEY_SIZE)
+        goto skip_ktls;
+
+    /* check version is 1.2 */
+    if (s->version != TLS1_2_VERSION)
+        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;
     }
-#endif
 
-#ifdef SSL_DEBUG
-    printf("which = %04X\nkey=", which);
-    {
-        int z;
-        for (z = 0; z < EVP_CIPHER_key_length(c); z++)
-            printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
+    /* 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;
     }
-    printf("\niv=");
-    {
-        int z;
-        for (z = 0; z < k; z++)
-            printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
+
+    /* 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;
+    }
+
+    memset(&crypto_info, 0, sizeof(crypto_info));
+    crypto_info.info.cipher_type = TLS_CIPHER_AES_GCM_128;
+    crypto_info.info.version = s->version;
+
+    EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GET_IV,
+                        EVP_GCM_TLS_FIXED_IV_LEN + EVP_GCM_TLS_EXPLICIT_IV_LEN,
+                        geniv);
+    memcpy(crypto_info.iv, geniv + EVP_GCM_TLS_FIXED_IV_LEN,
+           TLS_CIPHER_AES_GCM_128_IV_SIZE);
+    memcpy(crypto_info.salt, geniv, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
+    memcpy(crypto_info.key, key, EVP_CIPHER_key_length(c));
+    if (which & SSL3_CC_WRITE)
+        memcpy(crypto_info.rec_seq, &s->rlayer.write_sequence,
+                TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
+    else
+        memcpy(crypto_info.rec_seq, &s->rlayer.read_sequence,
+                TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
+
+    if (which & SSL3_CC_READ) {
+        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 */
+                ++crypto_info.rec_seq[bit];
+                if (crypto_info.rec_seq[bit] != 0)
+                    break;
+            }
+            count_unprocessed--;
+        }
+    }
+
+    /* 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);
     }
-    printf("\n");
-#endif
 
-    OPENSSL_cleanse(tmp1, sizeof(tmp1));
-    OPENSSL_cleanse(tmp2, sizeof(tmp1));
-    OPENSSL_cleanse(iv1, sizeof(iv1));
-    OPENSSL_cleanse(iv2, sizeof(iv2));
-    return (1);
+ 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:
-    SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
- err2:
-    OPENSSL_cleanse(tmp1, sizeof(tmp1));
-    OPENSSL_cleanse(tmp2, sizeof(tmp1));
-    OPENSSL_cleanse(iv1, sizeof(iv1));
-    OPENSSL_cleanse(iv2, sizeof(iv2));
-    return (0);
+    return 0;
 }
 
 int tls1_setup_key_block(SSL *s)
@@ -366,66 +489,54 @@ int tls1_setup_key_block(SSL *s)
     size_t num, mac_secret_size = 0;
     int ret = 0;
 
-    if (s->s3->tmp.key_block_length != 0)
-        return (1);
+    if (s->s3.tmp.key_block_length != 0)
+        return 1;
 
-    if (!ssl_cipher_get_evp
-        (s->session, &c, &hash, &mac_type, &mac_secret_size, &comp,
-         SSL_USE_ETM(s))) {
-        SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
-        return (0);
+    if (!ssl_cipher_get_evp(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;
     }
 
-    s->s3->tmp.new_sym_enc = c;
-    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;
+    s->s3.tmp.new_sym_enc = c;
+    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) {
-        SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
+        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;
+    s->s3.tmp.key_block_length = num;
+    s->s3.tmp.key_block = p;
 
-#ifdef SSL_DEBUG
-    printf("client random\n");
-    {
-        int z;
-        for (z = 0; z < SSL3_RANDOM_SIZE; z++)
-            printf("%02X%c", s->s3->client_random[z],
-                   ((z + 1) % 16) ? ' ' : '\n');
-    }
-    printf("server random\n");
-    {
-        int z;
-        for (z = 0; z < SSL3_RANDOM_SIZE; z++)
-            printf("%02X%c", s->s3->server_random[z],
-                   ((z + 1) % 16) ? ' ' : '\n');
-    }
-    printf("master key\n");
-    {
-        size_t z;
-        for (z = 0; z < s->session->master_key_length; z++)
-            printf("%02X%c", s->session->master_key[z],
-                   ((z + 1) % 16) ? ' ' : '\n');
-    }
-#endif
-    if (!tls1_generate_key_block(s, p, num))
+    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;
-#ifdef SSL_DEBUG
-    printf("\nkey block\n");
-    {
-        size_t z;
-        for (z = 0; z < num; z++)
-            printf("%02X%c", p[z], ((z + 1) % 16) ? ' ' : '\n');
     }
-#endif
+
+    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) {
@@ -433,39 +544,46 @@ int tls1_setup_key_block(SSL *s)
          * enable vulnerability countermeasure for CBC ciphers with known-IV
          * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
          */
-        s->s3->need_empty_fragments = 1;
+        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;
+                s->s3.need_empty_fragments = 0;
 
 #ifndef OPENSSL_NO_RC4
             if (s->session->cipher->algorithm_enc == SSL_RC4)
-                s->s3->need_empty_fragments = 0;
+                s->s3.need_empty_fragments = 0;
 #endif
         }
     }
 
     ret = 1;
  err:
-    return (ret);
+    return ret;
 }
 
-int tls1_final_finish_mac(SSL *s, const char *str, int slen, unsigned char *out)
+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];
 
-    if (!ssl3_digest_cached_records(s, 0))
+    if (!ssl3_digest_cached_records(s, 0)) {
+        /* SSLfatal() already called */
         return 0;
+    }
 
-    if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen))
+    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, TLS1_FINISH_MAC_LENGTH))
+                  out, TLS1_FINISH_MAC_LENGTH, 1)) {
+        /* SSLfatal() already called */
         return 0;
+    }
     OPENSSL_cleanse(hash, hashlen);
     return TLS1_FINISH_MAC_LENGTH;
 }
@@ -481,60 +599,53 @@ int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
          * 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))
+        if (!ssl3_digest_cached_records(s, 1)
+                || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
+            /* SSLfatal() already called */
             return 0;
-        if(!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen))
+        }
+        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;
-#ifdef SSL_DEBUG
-        fprintf(stderr, "Handshake hashes:\n");
-        BIO_dump_fp(stderr, (char *)hash, hashlen);
-#endif
-        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, s->session->master_key,
-                 SSL3_MASTER_SECRET_SIZE);
+        }
         OPENSSL_cleanse(hash, hashlen);
     } else {
-        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, s->session->master_key,
-                 SSL3_MASTER_SECRET_SIZE);
+        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;
+        }
     }
-#ifdef SSL_DEBUG
-    fprintf(stderr, "Premaster Secret:\n");
-    BIO_dump_fp(stderr, (char *)p, len);
-    fprintf(stderr, "Client Random:\n");
-    BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
-    fprintf(stderr, "Server Random:\n");
-    BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
-    fprintf(stderr, "Master Secret:\n");
-    BIO_dump_fp(stderr, (char *)s->session->master_key,
-                SSL3_MASTER_SECRET_SIZE);
-#endif
 
-#ifdef OPENSSL_SSL_TRACE_CRYPTO
-    if (s->msg_callback) {
-        s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
-                        p, len, s, s->msg_callback_arg);
-        s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
-                        s->s3->client_random, SSL3_RANDOM_SIZE,
-                        s, s->msg_callback_arg);
-        s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
-                        s->s3->server_random, SSL3_RANDOM_SIZE,
-                        s, s->msg_callback_arg);
-        s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
+    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, s, s->msg_callback_arg);
-    }
-#endif
+                        SSL3_MASTER_SECRET_SIZE, 4);
+    } OSSL_TRACE_END(TLS);
 
     *secret_size = SSL3_MASTER_SECRET_SIZE;
     return 1;
@@ -565,9 +676,9 @@ int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
     currentvalpos = 0;
     memcpy(val + currentvalpos, (unsigned char *)label, llen);
     currentvalpos += llen;
-    memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
+    memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
     currentvalpos += SSL3_RANDOM_SIZE;
-    memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
+    memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
     currentvalpos += SSL3_RANDOM_SIZE;
 
     if (use_context) {
@@ -608,7 +719,7 @@ int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
                   NULL, 0,
                   NULL, 0,
                   s->session->master_key, s->session->master_key_length,
-                  out, olen);
+                  out, olen, 0);
 
     goto ret;
  err1:
@@ -620,77 +731,79 @@ int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
     rv = 0;
  ret:
     OPENSSL_clear_free(val, vallen);
-    return (rv);
+    return rv;
 }
 
 int tls1_alert_code(int code)
 {
     switch (code) {
     case SSL_AD_CLOSE_NOTIFY:
-        return (SSL3_AD_CLOSE_NOTIFY);
+        return SSL3_AD_CLOSE_NOTIFY;
     case SSL_AD_UNEXPECTED_MESSAGE:
-        return (SSL3_AD_UNEXPECTED_MESSAGE);
+        return SSL3_AD_UNEXPECTED_MESSAGE;
     case SSL_AD_BAD_RECORD_MAC:
-        return (SSL3_AD_BAD_RECORD_MAC);
+        return SSL3_AD_BAD_RECORD_MAC;
     case SSL_AD_DECRYPTION_FAILED:
-        return (TLS1_AD_DECRYPTION_FAILED);
+        return TLS1_AD_DECRYPTION_FAILED;
     case SSL_AD_RECORD_OVERFLOW:
-        return (TLS1_AD_RECORD_OVERFLOW);
+        return TLS1_AD_RECORD_OVERFLOW;
     case SSL_AD_DECOMPRESSION_FAILURE:
-        return (SSL3_AD_DECOMPRESSION_FAILURE);
+        return SSL3_AD_DECOMPRESSION_FAILURE;
     case SSL_AD_HANDSHAKE_FAILURE:
-        return (SSL3_AD_HANDSHAKE_FAILURE);
+        return SSL3_AD_HANDSHAKE_FAILURE;
     case SSL_AD_NO_CERTIFICATE:
-        return (-1);
+        return -1;
     case SSL_AD_BAD_CERTIFICATE:
-        return (SSL3_AD_BAD_CERTIFICATE);
+        return SSL3_AD_BAD_CERTIFICATE;
     case SSL_AD_UNSUPPORTED_CERTIFICATE:
-        return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
+        return SSL3_AD_UNSUPPORTED_CERTIFICATE;
     case SSL_AD_CERTIFICATE_REVOKED:
-        return (SSL3_AD_CERTIFICATE_REVOKED);
+        return SSL3_AD_CERTIFICATE_REVOKED;
     case SSL_AD_CERTIFICATE_EXPIRED:
-        return (SSL3_AD_CERTIFICATE_EXPIRED);
+        return SSL3_AD_CERTIFICATE_EXPIRED;
     case SSL_AD_CERTIFICATE_UNKNOWN:
-        return (SSL3_AD_CERTIFICATE_UNKNOWN);
+        return SSL3_AD_CERTIFICATE_UNKNOWN;
     case SSL_AD_ILLEGAL_PARAMETER:
-        return (SSL3_AD_ILLEGAL_PARAMETER);
+        return SSL3_AD_ILLEGAL_PARAMETER;
     case SSL_AD_UNKNOWN_CA:
-        return (TLS1_AD_UNKNOWN_CA);
+        return TLS1_AD_UNKNOWN_CA;
     case SSL_AD_ACCESS_DENIED:
-        return (TLS1_AD_ACCESS_DENIED);
+        return TLS1_AD_ACCESS_DENIED;
     case SSL_AD_DECODE_ERROR:
-        return (TLS1_AD_DECODE_ERROR);
+        return TLS1_AD_DECODE_ERROR;
     case SSL_AD_DECRYPT_ERROR:
-        return (TLS1_AD_DECRYPT_ERROR);
+        return TLS1_AD_DECRYPT_ERROR;
     case SSL_AD_EXPORT_RESTRICTION:
-        return (TLS1_AD_EXPORT_RESTRICTION);
+        return TLS1_AD_EXPORT_RESTRICTION;
     case SSL_AD_PROTOCOL_VERSION:
-        return (TLS1_AD_PROTOCOL_VERSION);
+        return TLS1_AD_PROTOCOL_VERSION;
     case SSL_AD_INSUFFICIENT_SECURITY:
-        return (TLS1_AD_INSUFFICIENT_SECURITY);
+        return TLS1_AD_INSUFFICIENT_SECURITY;
     case SSL_AD_INTERNAL_ERROR:
-        return (TLS1_AD_INTERNAL_ERROR);
+        return TLS1_AD_INTERNAL_ERROR;
     case SSL_AD_USER_CANCELLED:
-        return (TLS1_AD_USER_CANCELLED);
+        return TLS1_AD_USER_CANCELLED;
     case SSL_AD_NO_RENEGOTIATION:
-        return (TLS1_AD_NO_RENEGOTIATION);
+        return TLS1_AD_NO_RENEGOTIATION;
     case SSL_AD_UNSUPPORTED_EXTENSION:
-        return (TLS1_AD_UNSUPPORTED_EXTENSION);
+        return TLS1_AD_UNSUPPORTED_EXTENSION;
     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
-        return (TLS1_AD_CERTIFICATE_UNOBTAINABLE);
+        return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
     case SSL_AD_UNRECOGNIZED_NAME:
-        return (TLS1_AD_UNRECOGNIZED_NAME);
+        return TLS1_AD_UNRECOGNIZED_NAME;
     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
-        return (TLS1_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);
+        return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
     case SSL_AD_UNKNOWN_PSK_IDENTITY:
-        return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
+        return TLS1_AD_UNKNOWN_PSK_IDENTITY;
     case SSL_AD_INAPPROPRIATE_FALLBACK:
-        return (TLS1_AD_INAPPROPRIATE_FALLBACK);
+        return TLS1_AD_INAPPROPRIATE_FALLBACK;
     case SSL_AD_NO_APPLICATION_PROTOCOL:
-        return (TLS1_AD_NO_APPLICATION_PROTOCOL);
+        return TLS1_AD_NO_APPLICATION_PROTOCOL;
+    case SSL_AD_CERTIFICATE_REQUIRED:
+        return SSL_AD_HANDSHAKE_FAILURE;
     default:
-        return (-1);
+        return -1;
     }
 }