1/*
2 * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10/*-
11 * AES-NI support for AES modes ecb, cbc, ofb, cfb, ctr.
12 * This file is included by cipher_aes_hw.c
13 */
14
15#define cipher_hw_aesni_ofb128 ossl_cipher_hw_generic_ofb128
16#define cipher_hw_aesni_cfb128 ossl_cipher_hw_generic_cfb128
17#define cipher_hw_aesni_cfb8   ossl_cipher_hw_generic_cfb8
18#define cipher_hw_aesni_cfb1   ossl_cipher_hw_generic_cfb1
19#define cipher_hw_aesni_ctr    ossl_cipher_hw_generic_ctr
20
21static int cipher_hw_aesni_initkey(PROV_CIPHER_CTX *dat,
22                                   const unsigned char *key, size_t keylen)
23{
24    int ret;
25    PROV_AES_CTX *adat = (PROV_AES_CTX *)dat;
26    AES_KEY *ks = &adat->ks.ks;
27
28    dat->ks = ks;
29
30    if ((dat->mode == EVP_CIPH_ECB_MODE || dat->mode == EVP_CIPH_CBC_MODE)
31        && !dat->enc) {
32        ret = aesni_set_decrypt_key(key, keylen * 8, ks);
33        dat->block = (block128_f) aesni_decrypt;
34        dat->stream.cbc = dat->mode == EVP_CIPH_CBC_MODE ?
35            (cbc128_f) aesni_cbc_encrypt : NULL;
36    } else {
37        ret = aesni_set_encrypt_key(key, keylen * 8, ks);
38        dat->block = (block128_f) aesni_encrypt;
39        if (dat->mode == EVP_CIPH_CBC_MODE)
40            dat->stream.cbc = (cbc128_f) aesni_cbc_encrypt;
41        else if (dat->mode == EVP_CIPH_CTR_MODE)
42            dat->stream.ctr = (ctr128_f) aesni_ctr32_encrypt_blocks;
43        else
44            dat->stream.cbc = NULL;
45    }
46
47    if (ret < 0) {
48        ERR_raise(ERR_LIB_PROV, PROV_R_KEY_SETUP_FAILED);
49        return 0;
50    }
51
52    return 1;
53}
54
55static int cipher_hw_aesni_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out,
56                               const unsigned char *in, size_t len)
57{
58    const AES_KEY *ks = ctx->ks;
59
60    aesni_cbc_encrypt(in, out, len, ks, ctx->iv, ctx->enc);
61
62    return 1;
63}
64
65static int cipher_hw_aesni_ecb(PROV_CIPHER_CTX *ctx, unsigned char *out,
66                               const unsigned char *in, size_t len)
67{
68    if (len < ctx->blocksize)
69        return 1;
70
71    aesni_ecb_encrypt(in, out, len, ctx->ks, ctx->enc);
72
73    return 1;
74}
75
76#define PROV_CIPHER_HW_declare(mode)                                           \
77static const PROV_CIPHER_HW aesni_##mode = {                                   \
78    cipher_hw_aesni_initkey,                                                   \
79    cipher_hw_aesni_##mode,                                                    \
80    cipher_hw_aes_copyctx                                                      \
81};
82#define PROV_CIPHER_HW_select(mode)                                            \
83if (AESNI_CAPABLE)                                                             \
84    return &aesni_##mode;
85