2 * Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include "ssl_local.h"
11 #include "internal/ktls.h"
13 #if defined(__FreeBSD__)
14 # include <crypto/cryptodev.h>
17 * Check if a given cipher is supported by the KTLS interface.
18 * The kernel might still fail the setsockopt() if no suitable
19 * provider is found, but this checks if the socket option
20 * supports the cipher suite used at all.
22 int ktls_check_supported_cipher(const SSL *s, const EVP_CIPHER *c,
23 const EVP_CIPHER_CTX *dd)
36 switch (s->s3.tmp.new_cipher->algorithm_enc) {
44 switch (s->s3.tmp.new_cipher->algorithm_mac) {
57 /* Function to configure kernel TLS structure */
58 int ktls_configure_crypto(const SSL *s, const EVP_CIPHER *c, EVP_CIPHER_CTX *dd,
59 void *rl_sequence, ktls_crypto_info_t *crypto_info,
60 unsigned char **rec_seq, unsigned char *iv,
61 unsigned char *key, unsigned char *mac_key,
62 size_t mac_secret_size)
64 memset(crypto_info, 0, sizeof(*crypto_info));
65 switch (s->s3.tmp.new_cipher->algorithm_enc) {
68 crypto_info->cipher_algorithm = CRYPTO_AES_NIST_GCM_16;
69 if (s->version == TLS1_3_VERSION)
70 crypto_info->iv_len = EVP_CIPHER_CTX_iv_length(dd);
72 crypto_info->iv_len = EVP_GCM_TLS_FIXED_IV_LEN;
76 switch (s->s3.tmp.new_cipher->algorithm_mac) {
78 crypto_info->auth_algorithm = CRYPTO_SHA1_HMAC;
81 crypto_info->auth_algorithm = CRYPTO_SHA2_256_HMAC;
84 crypto_info->auth_algorithm = CRYPTO_SHA2_384_HMAC;
89 crypto_info->cipher_algorithm = CRYPTO_AES_CBC;
90 crypto_info->iv_len = EVP_CIPHER_iv_length(c);
91 crypto_info->auth_key = mac_key;
92 crypto_info->auth_key_len = mac_secret_size;
97 crypto_info->cipher_key = key;
98 crypto_info->cipher_key_len = EVP_CIPHER_key_length(c);
100 crypto_info->tls_vmajor = (s->version >> 8) & 0x000000ff;
101 crypto_info->tls_vminor = (s->version & 0x000000ff);
102 # ifdef TCP_RXTLS_ENABLE
103 memcpy(crypto_info->rec_seq, rl_sequence, sizeof(crypto_info->rec_seq));
105 *rec_seq = crypto_info->rec_seq;
113 #endif /* __FreeBSD__ */
115 #if defined(OPENSSL_SYS_LINUX)
117 /* Function to check supported ciphers in Linux */
118 int ktls_check_supported_cipher(const SSL *s, const EVP_CIPHER *c,
119 const EVP_CIPHER_CTX *dd)
121 switch (s->version) {
129 /* check that cipher is AES_GCM_128, AES_GCM_256, AES_CCM_128 */
130 switch (EVP_CIPHER_nid(c))
132 # ifdef OPENSSL_KTLS_AES_CCM_128
133 case NID_aes_128_ccm:
134 if (EVP_CIPHER_CTX_tag_length(dd) != EVP_CCM_TLS_TAG_LEN)
137 # ifdef OPENSSL_KTLS_AES_GCM_128
138 case NID_aes_128_gcm:
140 # ifdef OPENSSL_KTLS_AES_GCM_256
141 case NID_aes_256_gcm:
149 /* Function to configure kernel TLS structure */
150 int ktls_configure_crypto(const SSL *s, const EVP_CIPHER *c, EVP_CIPHER_CTX *dd,
151 void *rl_sequence, ktls_crypto_info_t *crypto_info,
152 unsigned char **rec_seq, unsigned char *iv,
153 unsigned char *key, unsigned char *mac_key,
154 size_t mac_secret_size)
156 unsigned char geniv[12];
157 unsigned char *iiv = iv;
159 if (s->version == TLS1_2_VERSION &&
160 EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
161 if (!EVP_CIPHER_CTX_get_iv_state(dd, geniv,
162 EVP_GCM_TLS_FIXED_IV_LEN
163 + EVP_GCM_TLS_EXPLICIT_IV_LEN))
168 memset(crypto_info, 0, sizeof(*crypto_info));
169 switch (EVP_CIPHER_nid(c))
171 # ifdef OPENSSL_KTLS_AES_GCM_128
172 case NID_aes_128_gcm:
173 crypto_info->gcm128.info.cipher_type = TLS_CIPHER_AES_GCM_128;
174 crypto_info->gcm128.info.version = s->version;
175 crypto_info->tls_crypto_info_len = sizeof(crypto_info->gcm128);
176 memcpy(crypto_info->gcm128.iv, iiv + EVP_GCM_TLS_FIXED_IV_LEN,
177 TLS_CIPHER_AES_GCM_128_IV_SIZE);
178 memcpy(crypto_info->gcm128.salt, iiv, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
179 memcpy(crypto_info->gcm128.key, key, EVP_CIPHER_key_length(c));
180 memcpy(crypto_info->gcm128.rec_seq, rl_sequence,
181 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
183 *rec_seq = crypto_info->gcm128.rec_seq;
186 # ifdef OPENSSL_KTLS_AES_GCM_256
187 case NID_aes_256_gcm:
188 crypto_info->gcm256.info.cipher_type = TLS_CIPHER_AES_GCM_256;
189 crypto_info->gcm256.info.version = s->version;
190 crypto_info->tls_crypto_info_len = sizeof(crypto_info->gcm256);
191 memcpy(crypto_info->gcm256.iv, iiv + EVP_GCM_TLS_FIXED_IV_LEN,
192 TLS_CIPHER_AES_GCM_256_IV_SIZE);
193 memcpy(crypto_info->gcm256.salt, iiv, TLS_CIPHER_AES_GCM_256_SALT_SIZE);
194 memcpy(crypto_info->gcm256.key, key, EVP_CIPHER_key_length(c));
195 memcpy(crypto_info->gcm256.rec_seq, rl_sequence,
196 TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE);
198 *rec_seq = crypto_info->gcm256.rec_seq;
201 # ifdef OPENSSL_KTLS_AES_CCM_128
202 case NID_aes_128_ccm:
203 crypto_info->ccm128.info.cipher_type = TLS_CIPHER_AES_CCM_128;
204 crypto_info->ccm128.info.version = s->version;
205 crypto_info->tls_crypto_info_len = sizeof(crypto_info->ccm128);
206 memcpy(crypto_info->ccm128.iv, iiv + EVP_CCM_TLS_FIXED_IV_LEN,
207 TLS_CIPHER_AES_CCM_128_IV_SIZE);
208 memcpy(crypto_info->ccm128.salt, iiv, TLS_CIPHER_AES_CCM_128_SALT_SIZE);
209 memcpy(crypto_info->ccm128.key, key, EVP_CIPHER_key_length(c));
210 memcpy(crypto_info->ccm128.rec_seq, rl_sequence,
211 TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE);
213 *rec_seq = crypto_info->ccm128.rec_seq;
222 #endif /* OPENSSL_SYS_LINUX */