1 /*
2 * Copyright (c) 2001-2019, Arm Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 /*
8 * Definition of CCM:
9 * http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
10 * RFC 3610 "Counter with CBC-MAC (CCM)"
11 *
12 * Related:
13 * RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
14 */
15 #include "ccm_alt.h"
16
17 #if defined(MBEDTLS_CCM_C) && defined (MBEDTLS_CCM_ALT)
18
19 #include "cc_pal_types.h"
20 #include "mbedtls_common.h"
21
22 #include "mbedtls_ccm_internal.h"
23 #include "mbedtls_ccm_common.h"
24
25 #include "mbedtls/error.h"
26
27 /************************ Public Functions **********************/
28 /*
29 * Initialize context
30 */
mbedtls_ccm_init(mbedtls_ccm_context * ctx)31 void mbedtls_ccm_init( mbedtls_ccm_context *ctx )
32 {
33 mbedtls_ccm_init_int(ctx);
34 }
35
mbedtls_ccm_setkey(mbedtls_ccm_context * ctx,mbedtls_cipher_id_t cipher,const unsigned char * key,unsigned int keybits)36 int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
37 mbedtls_cipher_id_t cipher,
38 const unsigned char *key,
39 unsigned int keybits)
40 {
41 return mbedtls_ccm_setkey_int(ctx, cipher, key, keybits);
42 }
43
44 /*
45 * Free context
46 */
mbedtls_ccm_free(mbedtls_ccm_context * ctx)47 void mbedtls_ccm_free( mbedtls_ccm_context *ctx )
48 {
49 mbedtls_ccm_free_int(ctx);
50 }
51
52 /*
53 * Authenticated encryption
54 */
mbedtls_ccm_encrypt_and_tag(mbedtls_ccm_context * ctx,size_t length,const unsigned char * iv,size_t iv_len,const unsigned char * add,size_t add_len,const unsigned char * input,unsigned char * output,unsigned char * tag,size_t tag_len)55 int mbedtls_ccm_encrypt_and_tag( mbedtls_ccm_context *ctx,
56 size_t length,
57 const unsigned char *iv,
58 size_t iv_len,
59 const unsigned char *add,
60 size_t add_len,
61 const unsigned char *input,
62 unsigned char *output,
63 unsigned char *tag,
64 size_t tag_len )
65 {
66 return mbedtls_ccm_encrypt_and_tag_int(ctx, length, iv, iv_len, add, add_len, input, output, tag, tag_len, MBEDTLS_AESCCM_MODE_CCM);
67 }
68
69 /*
70 * Authenticated decryption
71 */
mbedtls_ccm_auth_decrypt(mbedtls_ccm_context * ctx,size_t length,const unsigned char * iv,size_t iv_len,const unsigned char * add,size_t add_len,const unsigned char * input,unsigned char * output,const unsigned char * tag,size_t tag_len)72 int mbedtls_ccm_auth_decrypt( mbedtls_ccm_context *ctx,
73 size_t length,
74 const unsigned char *iv,
75 size_t iv_len,
76 const unsigned char *add,
77 size_t add_len,
78 const unsigned char *input,
79 unsigned char *output,
80 const unsigned char *tag,
81 size_t tag_len )
82 {
83
84
85 return mbedtls_ccm_auth_decrypt_int( ctx, length, iv, iv_len, add, add_len, input, output, tag, tag_len, MBEDTLS_AESCCM_MODE_CCM);
86 }
87
mbedtls_ccm_star_encrypt_and_tag(mbedtls_ccm_context * ctx,size_t length,const unsigned char * iv,size_t iv_len,const unsigned char * add,size_t add_len,const unsigned char * input,unsigned char * output,unsigned char * tag,size_t tag_len)88 int mbedtls_ccm_star_encrypt_and_tag(mbedtls_ccm_context *ctx,
89 size_t length,
90 const unsigned char *iv,
91 size_t iv_len,
92 const unsigned char *add,
93 size_t add_len,
94 const unsigned char *input,
95 unsigned char *output,
96 unsigned char *tag,
97 size_t tag_len)
98 {
99 return mbedtls_ccm_encrypt_and_tag_int(ctx, length, iv, iv_len, add, add_len, input, output, tag, tag_len, MBEDTLS_AESCCM_MODE_STAR);
100 }
101
mbedtls_ccm_star_auth_decrypt(mbedtls_ccm_context * ctx,size_t length,const unsigned char * iv,size_t iv_len,const unsigned char * add,size_t add_len,const unsigned char * input,unsigned char * output,const unsigned char * tag,size_t tag_len)102 int mbedtls_ccm_star_auth_decrypt(mbedtls_ccm_context *ctx,
103 size_t length,
104 const unsigned char *iv,
105 size_t iv_len,
106 const unsigned char *add,
107 size_t add_len,
108 const unsigned char *input,
109 unsigned char *output,
110 const unsigned char *tag,
111 size_t tag_len)
112 {
113 return mbedtls_ccm_auth_decrypt_int(ctx, length, iv, iv_len, add, add_len, input, output, tag, tag_len, MBEDTLS_AESCCM_MODE_STAR);
114
115 }
116
mbedtls_ccm_starts(mbedtls_ccm_context * ctx,int mode,const unsigned char * iv,size_t iv_len)117 int mbedtls_ccm_starts( mbedtls_ccm_context *ctx,
118 int mode,
119 const unsigned char *iv,
120 size_t iv_len )
121 {
122 CC_UNUSED_PARAM(ctx);
123 CC_UNUSED_PARAM(mode);
124 CC_UNUSED_PARAM(iv);
125 CC_UNUSED_PARAM(iv_len);
126
127 return (MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED);
128 }
129
mbedtls_ccm_set_lengths(mbedtls_ccm_context * ctx,size_t total_ad_len,size_t plaintext_len,size_t tag_len)130 int mbedtls_ccm_set_lengths( mbedtls_ccm_context *ctx,
131 size_t total_ad_len,
132 size_t plaintext_len,
133 size_t tag_len )
134 {
135 CC_UNUSED_PARAM(ctx);
136 CC_UNUSED_PARAM(total_ad_len);
137 CC_UNUSED_PARAM(plaintext_len);
138 CC_UNUSED_PARAM(tag_len);
139
140 return (MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED);
141 }
142
mbedtls_ccm_update_ad(mbedtls_ccm_context * ctx,const unsigned char * ad,size_t ad_len)143 int mbedtls_ccm_update_ad( mbedtls_ccm_context *ctx,
144 const unsigned char *ad,
145 size_t ad_len )
146 {
147 CC_UNUSED_PARAM(ctx);
148 CC_UNUSED_PARAM(ad);
149 CC_UNUSED_PARAM(ad_len);
150
151 return (MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED);
152 }
153
mbedtls_ccm_update(mbedtls_ccm_context * ctx,const unsigned char * input,size_t input_len,unsigned char * output,size_t output_size,size_t * output_len)154 int mbedtls_ccm_update( mbedtls_ccm_context *ctx,
155 const unsigned char *input, size_t input_len,
156 unsigned char *output, size_t output_size,
157 size_t *output_len )
158 {
159 CC_UNUSED_PARAM(ctx);
160 CC_UNUSED_PARAM(input);
161 CC_UNUSED_PARAM(input_len);
162 CC_UNUSED_PARAM(output);
163 CC_UNUSED_PARAM(output_size);
164 CC_UNUSED_PARAM(output_len);
165
166 return (MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED);
167 }
168
mbedtls_ccm_finish(mbedtls_ccm_context * ctx,unsigned char * tag,size_t tag_len)169 int mbedtls_ccm_finish( mbedtls_ccm_context *ctx,
170 unsigned char *tag, size_t tag_len )
171 {
172 CC_UNUSED_PARAM(ctx);
173 CC_UNUSED_PARAM(tag);
174 CC_UNUSED_PARAM(tag_len);
175
176 return (MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED);
177 }
178
179 #endif /* defined(MBEDTLS_CCM_C) && defined (MBEDTLS_CCM_ALT) */
180
