1 /* gcm-aes.c
2
3 Galois counter mode using AES as the underlying cipher.
4
5 Copyright (C) 2011 Niels Möller
6
7 This file is part of GNU Nettle.
8
9 GNU Nettle is free software: you can redistribute it and/or
10 modify it under the terms of either:
11
12 * the GNU Lesser General Public License as published by the Free
13 Software Foundation; either version 3 of the License, or (at your
14 option) any later version.
15
16 or
17
18 * the GNU General Public License as published by the Free
19 Software Foundation; either version 2 of the License, or (at your
20 option) any later version.
21
22 or both in parallel, as here.
23
24 GNU Nettle is distributed in the hope that it will be useful,
25 but WITHOUT ANY WARRANTY; without even the implied warranty of
26 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 General Public License for more details.
28
29 You should have received copies of the GNU General Public License and
30 the GNU Lesser General Public License along with this program. If
31 not, see http://www.gnu.org/licenses/.
32 */
33
34 #if HAVE_CONFIG_H
35 # include "config.h"
36 #endif
37
38 /* This file implements and uses deprecated functions */
39 #define _NETTLE_ATTRIBUTE_DEPRECATED
40
41 #include "gcm.h"
42
43 void
gcm_aes_set_key(struct gcm_aes_ctx * ctx,size_t length,const uint8_t * key)44 gcm_aes_set_key(struct gcm_aes_ctx *ctx, size_t length, const uint8_t *key)
45 {
46 aes_set_encrypt_key (&ctx->cipher, length, key);
47 gcm_set_key (&ctx->key, &ctx->cipher,
48 (nettle_cipher_func *) aes_encrypt);
49 }
50
51 void
gcm_aes_set_iv(struct gcm_aes_ctx * ctx,size_t length,const uint8_t * iv)52 gcm_aes_set_iv(struct gcm_aes_ctx *ctx,
53 size_t length, const uint8_t *iv)
54 {
55 GCM_SET_IV(ctx, length, iv);
56 }
57
58 void
gcm_aes_update(struct gcm_aes_ctx * ctx,size_t length,const uint8_t * data)59 gcm_aes_update(struct gcm_aes_ctx *ctx, size_t length, const uint8_t *data)
60 {
61 GCM_UPDATE(ctx, length, data);
62 }
63
64 void
gcm_aes_encrypt(struct gcm_aes_ctx * ctx,size_t length,uint8_t * dst,const uint8_t * src)65 gcm_aes_encrypt(struct gcm_aes_ctx *ctx,
66 size_t length, uint8_t *dst, const uint8_t *src)
67 {
68 GCM_ENCRYPT(ctx, aes_encrypt, length, dst, src);
69 }
70
71 void
gcm_aes_decrypt(struct gcm_aes_ctx * ctx,size_t length,uint8_t * dst,const uint8_t * src)72 gcm_aes_decrypt(struct gcm_aes_ctx *ctx,
73 size_t length, uint8_t *dst, const uint8_t *src)
74 {
75 GCM_DECRYPT(ctx, aes_encrypt, length, dst, src);
76 }
77
78 void
gcm_aes_digest(struct gcm_aes_ctx * ctx,size_t length,uint8_t * digest)79 gcm_aes_digest(struct gcm_aes_ctx *ctx,
80 size_t length, uint8_t *digest)
81 {
82 GCM_DIGEST(ctx, aes_encrypt, length, digest);
83 }
84