2 * Copyright 2019-2020 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
11 * Crypto extention support for AES GCM.
12 * This file is included by cipher_aes_gcm_hw.c
15 size_t armv8_aes_gcm_encrypt(const unsigned char *in, unsigned char *out, size_t len,
16 const void *key, unsigned char ivec[16], u64 *Xi)
18 size_t align_bytes = 0;
19 align_bytes = len - len % 16;
21 AES_KEY *aes_key = (AES_KEY *)key;
23 switch(aes_key->rounds) {
25 aes_gcm_enc_128_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
28 aes_gcm_enc_192_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
31 aes_gcm_enc_256_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
37 size_t armv8_aes_gcm_decrypt(const unsigned char *in, unsigned char *out, size_t len,
38 const void *key, unsigned char ivec[16], u64 *Xi)
40 size_t align_bytes = 0;
41 align_bytes = len - len % 16;
43 AES_KEY *aes_key = (AES_KEY *)key;
45 switch(aes_key->rounds) {
47 aes_gcm_dec_128_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
50 aes_gcm_dec_192_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
53 aes_gcm_dec_256_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
59 static int armv8_aes_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
62 PROV_AES_GCM_CTX *actx = (PROV_AES_GCM_CTX *)ctx;
63 AES_KEY *ks = &actx->ks.ks;
65 GCM_HW_SET_KEY_CTR_FN(ks, aes_v8_set_encrypt_key, aes_v8_encrypt,
66 aes_v8_ctr32_encrypt_blocks);
71 static const PROV_GCM_HW armv8_aes_gcm = {
72 armv8_aes_gcm_initkey,
75 generic_aes_gcm_cipher_update,
80 const PROV_GCM_HW *PROV_AES_HW_gcm(size_t keybits)
82 return AES_PMULL_CAPABLE ? &armv8_aes_gcm : &aes_gcm;