mirror of
https://github.com/openssl/openssl.git
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3aa7212e0a
Linux kernel is going to support ChaCha20-Poly1305 in TLS offload. Add support for this cipher. Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/13475)
242 lines
8.1 KiB
C
242 lines
8.1 KiB
C
/*
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* Copyright 2018-2020 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 "internal/ktls.h"
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#if defined(__FreeBSD__)
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# include <crypto/cryptodev.h>
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/*-
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* Check if a given cipher is supported by the KTLS interface.
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* The kernel might still fail the setsockopt() if no suitable
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* provider is found, but this checks if the socket option
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* supports the cipher suite used at all.
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*/
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int ktls_check_supported_cipher(const SSL *s, const EVP_CIPHER *c,
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const EVP_CIPHER_CTX *dd)
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{
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switch (s->version) {
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case TLS1_VERSION:
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case TLS1_1_VERSION:
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case TLS1_2_VERSION:
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case TLS1_3_VERSION:
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break;
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default:
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return 0;
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}
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switch (s->s3.tmp.new_cipher->algorithm_enc) {
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case SSL_AES128GCM:
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case SSL_AES256GCM:
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return 1;
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case SSL_AES128:
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case SSL_AES256:
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if (s->ext.use_etm)
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return 0;
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switch (s->s3.tmp.new_cipher->algorithm_mac) {
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case SSL_SHA1:
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case SSL_SHA256:
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case SSL_SHA384:
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return 1;
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default:
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return 0;
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}
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default:
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return 0;
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}
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}
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/* Function to configure kernel TLS structure */
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int ktls_configure_crypto(const SSL *s, const EVP_CIPHER *c, EVP_CIPHER_CTX *dd,
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void *rl_sequence, ktls_crypto_info_t *crypto_info,
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unsigned char **rec_seq, unsigned char *iv,
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unsigned char *key, unsigned char *mac_key,
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size_t mac_secret_size)
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{
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memset(crypto_info, 0, sizeof(*crypto_info));
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switch (s->s3.tmp.new_cipher->algorithm_enc) {
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case SSL_AES128GCM:
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case SSL_AES256GCM:
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crypto_info->cipher_algorithm = CRYPTO_AES_NIST_GCM_16;
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if (s->version == TLS1_3_VERSION)
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crypto_info->iv_len = EVP_CIPHER_CTX_iv_length(dd);
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else
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crypto_info->iv_len = EVP_GCM_TLS_FIXED_IV_LEN;
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break;
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case SSL_AES128:
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case SSL_AES256:
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switch (s->s3.tmp.new_cipher->algorithm_mac) {
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case SSL_SHA1:
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crypto_info->auth_algorithm = CRYPTO_SHA1_HMAC;
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break;
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case SSL_SHA256:
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crypto_info->auth_algorithm = CRYPTO_SHA2_256_HMAC;
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break;
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case SSL_SHA384:
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crypto_info->auth_algorithm = CRYPTO_SHA2_384_HMAC;
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break;
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default:
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return 0;
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}
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crypto_info->cipher_algorithm = CRYPTO_AES_CBC;
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crypto_info->iv_len = EVP_CIPHER_iv_length(c);
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crypto_info->auth_key = mac_key;
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crypto_info->auth_key_len = mac_secret_size;
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break;
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default:
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return 0;
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}
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crypto_info->cipher_key = key;
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crypto_info->cipher_key_len = EVP_CIPHER_key_length(c);
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crypto_info->iv = iv;
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crypto_info->tls_vmajor = (s->version >> 8) & 0x000000ff;
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crypto_info->tls_vminor = (s->version & 0x000000ff);
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# ifdef TCP_RXTLS_ENABLE
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memcpy(crypto_info->rec_seq, rl_sequence, sizeof(crypto_info->rec_seq));
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if (rec_seq != NULL)
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*rec_seq = crypto_info->rec_seq;
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# else
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if (rec_seq != NULL)
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*rec_seq = NULL;
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# endif
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return 1;
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};
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#endif /* __FreeBSD__ */
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#if defined(OPENSSL_SYS_LINUX)
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/* Function to check supported ciphers in Linux */
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int ktls_check_supported_cipher(const SSL *s, const EVP_CIPHER *c,
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const EVP_CIPHER_CTX *dd)
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{
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switch (s->version) {
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case TLS1_2_VERSION:
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case TLS1_3_VERSION:
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break;
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default:
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return 0;
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}
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/* check that cipher is AES_GCM_128, AES_GCM_256, AES_CCM_128
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* or Chacha20-Poly1305
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*/
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switch (EVP_CIPHER_nid(c))
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{
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# ifdef OPENSSL_KTLS_AES_CCM_128
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case NID_aes_128_ccm:
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if (EVP_CIPHER_CTX_tag_length(dd) != EVP_CCM_TLS_TAG_LEN)
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return 0;
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# endif
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# ifdef OPENSSL_KTLS_AES_GCM_128
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case NID_aes_128_gcm:
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# endif
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# ifdef OPENSSL_KTLS_AES_GCM_256
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case NID_aes_256_gcm:
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# endif
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# ifdef OPENSSL_KTLS_CHACHA20_POLY1305
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case NID_chacha20_poly1305:
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# endif
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return 1;
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default:
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return 0;
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}
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}
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/* Function to configure kernel TLS structure */
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int ktls_configure_crypto(const SSL *s, const EVP_CIPHER *c, EVP_CIPHER_CTX *dd,
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void *rl_sequence, ktls_crypto_info_t *crypto_info,
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unsigned char **rec_seq, unsigned char *iv,
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unsigned char *key, unsigned char *mac_key,
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size_t mac_secret_size)
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{
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unsigned char geniv[12];
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unsigned char *iiv = iv;
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if (s->version == TLS1_2_VERSION &&
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EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
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if (!EVP_CIPHER_CTX_get_updated_iv(dd, geniv,
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EVP_GCM_TLS_FIXED_IV_LEN
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+ EVP_GCM_TLS_EXPLICIT_IV_LEN))
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return 0;
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iiv = geniv;
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}
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memset(crypto_info, 0, sizeof(*crypto_info));
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switch (EVP_CIPHER_nid(c))
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{
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# ifdef OPENSSL_KTLS_AES_GCM_128
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case NID_aes_128_gcm:
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crypto_info->gcm128.info.cipher_type = TLS_CIPHER_AES_GCM_128;
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crypto_info->gcm128.info.version = s->version;
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crypto_info->tls_crypto_info_len = sizeof(crypto_info->gcm128);
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memcpy(crypto_info->gcm128.iv, iiv + EVP_GCM_TLS_FIXED_IV_LEN,
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TLS_CIPHER_AES_GCM_128_IV_SIZE);
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memcpy(crypto_info->gcm128.salt, iiv, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
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memcpy(crypto_info->gcm128.key, key, EVP_CIPHER_key_length(c));
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memcpy(crypto_info->gcm128.rec_seq, rl_sequence,
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TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
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if (rec_seq != NULL)
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*rec_seq = crypto_info->gcm128.rec_seq;
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return 1;
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# endif
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# ifdef OPENSSL_KTLS_AES_GCM_256
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case NID_aes_256_gcm:
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crypto_info->gcm256.info.cipher_type = TLS_CIPHER_AES_GCM_256;
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crypto_info->gcm256.info.version = s->version;
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crypto_info->tls_crypto_info_len = sizeof(crypto_info->gcm256);
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memcpy(crypto_info->gcm256.iv, iiv + EVP_GCM_TLS_FIXED_IV_LEN,
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TLS_CIPHER_AES_GCM_256_IV_SIZE);
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memcpy(crypto_info->gcm256.salt, iiv, TLS_CIPHER_AES_GCM_256_SALT_SIZE);
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memcpy(crypto_info->gcm256.key, key, EVP_CIPHER_key_length(c));
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memcpy(crypto_info->gcm256.rec_seq, rl_sequence,
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TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE);
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if (rec_seq != NULL)
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*rec_seq = crypto_info->gcm256.rec_seq;
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return 1;
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# endif
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# ifdef OPENSSL_KTLS_AES_CCM_128
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case NID_aes_128_ccm:
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crypto_info->ccm128.info.cipher_type = TLS_CIPHER_AES_CCM_128;
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crypto_info->ccm128.info.version = s->version;
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crypto_info->tls_crypto_info_len = sizeof(crypto_info->ccm128);
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memcpy(crypto_info->ccm128.iv, iiv + EVP_CCM_TLS_FIXED_IV_LEN,
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TLS_CIPHER_AES_CCM_128_IV_SIZE);
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memcpy(crypto_info->ccm128.salt, iiv, TLS_CIPHER_AES_CCM_128_SALT_SIZE);
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memcpy(crypto_info->ccm128.key, key, EVP_CIPHER_key_length(c));
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memcpy(crypto_info->ccm128.rec_seq, rl_sequence,
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TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE);
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if (rec_seq != NULL)
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*rec_seq = crypto_info->ccm128.rec_seq;
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return 1;
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# endif
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# ifdef OPENSSL_KTLS_CHACHA20_POLY1305
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case NID_chacha20_poly1305:
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crypto_info->chacha20poly1305.info.cipher_type = TLS_CIPHER_CHACHA20_POLY1305;
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crypto_info->chacha20poly1305.info.version = s->version;
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crypto_info->tls_crypto_info_len = sizeof(crypto_info->chacha20poly1305);
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memcpy(crypto_info->chacha20poly1305.iv, iiv,
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TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE);
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memcpy(crypto_info->chacha20poly1305.key, key, EVP_CIPHER_key_length(c));
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memcpy(crypto_info->chacha20poly1305.rec_seq, rl_sequence,
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TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE);
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if (rec_seq != NULL)
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*rec_seq = crypto_info->chacha20poly1305.rec_seq;
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return 1;
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# endif
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default:
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return 0;
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}
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}
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#endif /* OPENSSL_SYS_LINUX */
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