1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #ifndef _AES_CBC_CRYPT_H
27 #define _AES_CBC_CRYPT_H
28
29 #pragma ident "@(#)aes_cbc_crypt.h 1.6 07/09/11 SMI"
30
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34
35 #include <sys/crypto/common.h>
36 #include "aes_impl.h"
37
38 /*
39 * ac_keysched: Pointer to key schedule.
40 *
41 * ac_keysched_len: Length of the key schedule.
42 *
43 * ac_remainder: This is for residual data, i.e. data that can't
44 * be processed because there are too few bytes.
45 * Must wait until more data arrives.
46 *
47 * ac_remainder_len: Number of bytes in ac_remainder.
48 *
49 * ac_iv: Scratch buffer that sometimes contains the IV.
50 *
51 * ac_lastblock: Scratch buffer.
52 *
53 * ac_lastp: Pointer to previous block of ciphertext.
54 *
55 * ac_copy_to: Pointer to where encrypted residual data needs
56 * to be copied.
57 *
58 * ac_flags: AES_PROVIDER_OWNS_KEY_SCHEDULE
59 * When a context is freed, it is necessary
60 * to know whether the key schedule was allocated
61 * by the caller, or by aes_encrypt_init() or
62 * aes_decrypt_init(). If allocated by the latter,
63 * then it needs to be freed.
64 *
65 * AES_ECB_MODE, AES_CBC_MODE, or AES_CTR_MODE
66 * AES_CCM_MODE
67 *
68 * ac_ccm_mac_len: Stores length of the MAC in CCM mode.
69 * ac_ccm_mac_buf: Stores the intermediate value for MAC in CCM encrypt.
70 * In CCM decrypt, stores the input MAC value.
71 * ac_ccm_data_len: Length of the plaintext for CCM mode encrypt, or
72 * length of the ciphertext for CCM mode decrypt.
73 * ac_ccm_processed_data_len:
74 * Length of processed plaintext in CCM mode encrypt,
75 * or length of processed ciphertex for CCM mode decrypt.
76 * ac_ccm_processed_mac_len:
77 * Length of MAC data accumulated in CCM mode decrypt.
78 *
79 * ac_ccm_pt_buf: Only used in CCM mode decrypt. It stores the
80 * decrypted plaintext to be returned when
81 * MAC verification succeeds in decrypt_final.
82 * Memory for this should be allocated in the AES module.
83 *
84 */
85 typedef struct aes_ctx {
86 void *ac_keysched;
87 size_t ac_keysched_len;
88 uint64_t ac_iv[2];
89 uint64_t ac_lastblock[2];
90 uint64_t ac_remainder[2];
91 size_t ac_remainder_len;
92 uint8_t *ac_lastp;
93 uint8_t *ac_copy_to;
94 uint32_t ac_flags;
95 size_t ac_ccm_mac_len;
96 uint64_t ac_ccm_mac_buf[2];
97 size_t ac_ccm_data_len;
98 size_t ac_ccm_processed_data_len;
99 size_t ac_ccm_processed_mac_len;
100 uint8_t *ac_ccm_pt_buf;
101 uint64_t ac_ccm_mac_input_buf[2];
102 } aes_ctx_t;
103
104 /*
105 * ac_cb Counter block.
106 *
107 * ac_counter_mask Mask of counter bits in the last 8 bytes of the
108 * counter block.
109 */
110 #define ac_cb ac_iv
111 #define ac_counter_mask ac_lastblock[0]
112
113 #define AES_PROVIDER_OWNS_KEY_SCHEDULE 0x00000001
114 #define AES_ECB_MODE 0x00000002
115 #define AES_CBC_MODE 0x00000004
116 #define AES_CTR_MODE 0x00000008
117 #define AES_CCM_MODE 0x00000010
118
119 extern int aes_encrypt_contiguous_blocks(aes_ctx_t *, char *, size_t,
120 crypto_data_t *);
121 extern int aes_decrypt_contiguous_blocks(aes_ctx_t *, char *, size_t,
122 crypto_data_t *);
123 extern int aes_counter_final(aes_ctx_t *, crypto_data_t *);
124 extern int aes_ccm_init(aes_ctx_t *, unsigned char *, size_t,
125 unsigned char *, size_t);
126 extern int aes_ccm_validate_args(CK_AES_CCM_PARAMS *, boolean_t);
127 extern int aes_ccm_encrypt_final(aes_ctx_t *, crypto_data_t *);
128 extern int aes_ccm_decrypt_final(aes_ctx_t *, crypto_data_t *);
129
130 #ifdef __cplusplus
131 }
132 #endif
133
134 #endif /* _AES_CBC_CRYPT_H */