2 zip_crypto_gnutls.c -- GnuTLS wrapper.
3 Copyright (C) 2018-2021 Dieter Baron and Thomas Klausner
5 This file is part of libzip, a library to manipulate ZIP archives.
6 The authors can be contacted at <info@libzip.org>
8 Redistribution and use in source and binary forms, with or without
9 modification, are permitted provided that the following conditions
11 1. Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
13 2. Redistributions in binary form must reproduce the above copyright
14 notice, this list of conditions and the following disclaimer in
15 the documentation and/or other materials provided with the
17 3. The names of the authors may not be used to endorse or promote
18 products derived from this software without specific prior
21 THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
22 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
25 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29 IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 #include "zip_crypto.h"
41 _zip_crypto_aes_new(const zip_uint8_t *key, zip_uint16_t key_size, zip_error_t *error) {
42 _zip_crypto_aes_t *aes;
44 if ((aes = (_zip_crypto_aes_t *)malloc(sizeof(*aes))) == NULL) {
45 zip_error_set(error, ZIP_ER_MEMORY, 0);
49 aes->key_size = key_size;
51 switch (aes->key_size) {
53 nettle_aes128_set_encrypt_key(&aes->ctx.ctx_128, key);
56 nettle_aes192_set_encrypt_key(&aes->ctx.ctx_192, key);
59 nettle_aes256_set_encrypt_key(&aes->ctx.ctx_256, key);
62 zip_error_set(error, ZIP_ER_INVAL, 0);
71 _zip_crypto_aes_encrypt_block(_zip_crypto_aes_t *aes, const zip_uint8_t *in, zip_uint8_t *out) {
72 switch (aes->key_size) {
74 nettle_aes128_encrypt(&aes->ctx.ctx_128, ZIP_CRYPTO_AES_BLOCK_LENGTH, out, in);
77 nettle_aes192_encrypt(&aes->ctx.ctx_192, ZIP_CRYPTO_AES_BLOCK_LENGTH, out, in);
80 nettle_aes256_encrypt(&aes->ctx.ctx_256, ZIP_CRYPTO_AES_BLOCK_LENGTH, out, in);
88 _zip_crypto_aes_free(_zip_crypto_aes_t *aes) {
93 _zip_crypto_clear(aes, sizeof(*aes));
99 _zip_crypto_hmac_new(const zip_uint8_t *secret, zip_uint64_t secret_length, zip_error_t *error) {
100 _zip_crypto_hmac_t *hmac;
102 if ((hmac = (_zip_crypto_hmac_t *)malloc(sizeof(*hmac))) == NULL) {
103 zip_error_set(error, ZIP_ER_MEMORY, 0);
107 if (gnutls_hmac_init(hmac, GNUTLS_MAC_SHA1, secret, secret_length) < 0) {
108 zip_error_set(error, ZIP_ER_INTERNAL, 0);
118 _zip_crypto_hmac_free(_zip_crypto_hmac_t *hmac) {
119 zip_uint8_t buf[ZIP_CRYPTO_SHA1_LENGTH];
125 gnutls_hmac_deinit(*hmac, buf);
126 _zip_crypto_clear(hmac, sizeof(*hmac));
132 zip_secure_random(zip_uint8_t *buffer, zip_uint16_t length) {
133 return gnutls_rnd(GNUTLS_RND_KEY, buffer, length) == 0;