@samitouri / QOSamiQemu
Code Commits Issues Pulls Sessions CI/CD
master
master
c 187 lines 5.93 KB
Raw
1 /*
2 * QEMU Crypto hmac algorithms (based on nettle)
3 *
4 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
5 *
6 * Authors:
7 * Longpeng(Mike) <longpeng2@huawei.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or
10 * (at your option) any later version. See the COPYING file in the
11 * top-level directory.
12 *
13 */
14
15 #include "qemu/osdep.h"
16 #include "qapi/error.h"
17 #include "crypto/hmac.h"
18 #include "hmacpriv.h"
19 #include <nettle/hmac.h>
20
21 typedef void (*qcrypto_nettle_hmac_setkey)(void *ctx,
22 size_t key_length,
23 const uint8_t *key);
24
25 typedef void (*qcrypto_nettle_hmac_update)(void *ctx,
26 size_t length,
27 const uint8_t *data);
28
29 typedef void (*qcrypto_nettle_hmac_digest)(void *ctx,
30 size_t length,
31 uint8_t *digest);
32
33 typedef struct QCryptoHmacNettle QCryptoHmacNettle;
34 struct QCryptoHmacNettle {
35 union qcrypto_nettle_hmac_ctx {
36 struct hmac_md5_ctx md5_ctx;
37 struct hmac_sha1_ctx sha1_ctx;
38 struct hmac_sha256_ctx sha256_ctx; /* equals hmac_sha224_ctx */
39 struct hmac_sha512_ctx sha512_ctx; /* equals hmac_sha384_ctx */
40 struct hmac_ripemd160_ctx ripemd160_ctx;
41 #ifdef CONFIG_CRYPTO_SM3
42 struct hmac_sm3_ctx ctx;
43 #endif
44 } u;
45 };
46
47 struct qcrypto_nettle_hmac_alg {
48 qcrypto_nettle_hmac_setkey setkey;
49 qcrypto_nettle_hmac_update update;
50 qcrypto_nettle_hmac_digest digest;
51 size_t len;
52 } qcrypto_hmac_alg_map[QCRYPTO_HASH_ALGO__MAX] = {
53 [QCRYPTO_HASH_ALGO_MD5] = {
54 .setkey = (qcrypto_nettle_hmac_setkey)hmac_md5_set_key,
55 .update = (qcrypto_nettle_hmac_update)hmac_md5_update,
56 .digest = (qcrypto_nettle_hmac_digest)hmac_md5_digest,
57 .len = MD5_DIGEST_SIZE,
58 },
59 [QCRYPTO_HASH_ALGO_SHA1] = {
60 .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha1_set_key,
61 .update = (qcrypto_nettle_hmac_update)hmac_sha1_update,
62 .digest = (qcrypto_nettle_hmac_digest)hmac_sha1_digest,
63 .len = SHA1_DIGEST_SIZE,
64 },
65 [QCRYPTO_HASH_ALGO_SHA224] = {
66 .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha224_set_key,
67 .update = (qcrypto_nettle_hmac_update)hmac_sha224_update,
68 .digest = (qcrypto_nettle_hmac_digest)hmac_sha224_digest,
69 .len = SHA224_DIGEST_SIZE,
70 },
71 [QCRYPTO_HASH_ALGO_SHA256] = {
72 .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha256_set_key,
73 .update = (qcrypto_nettle_hmac_update)hmac_sha256_update,
74 .digest = (qcrypto_nettle_hmac_digest)hmac_sha256_digest,
75 .len = SHA256_DIGEST_SIZE,
76 },
77 [QCRYPTO_HASH_ALGO_SHA384] = {
78 .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha384_set_key,
79 .update = (qcrypto_nettle_hmac_update)hmac_sha384_update,
80 .digest = (qcrypto_nettle_hmac_digest)hmac_sha384_digest,
81 .len = SHA384_DIGEST_SIZE,
82 },
83 [QCRYPTO_HASH_ALGO_SHA512] = {
84 .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha512_set_key,
85 .update = (qcrypto_nettle_hmac_update)hmac_sha512_update,
86 .digest = (qcrypto_nettle_hmac_digest)hmac_sha512_digest,
87 .len = SHA512_DIGEST_SIZE,
88 },
89 [QCRYPTO_HASH_ALGO_RIPEMD160] = {
90 .setkey = (qcrypto_nettle_hmac_setkey)hmac_ripemd160_set_key,
91 .update = (qcrypto_nettle_hmac_update)hmac_ripemd160_update,
92 .digest = (qcrypto_nettle_hmac_digest)hmac_ripemd160_digest,
93 .len = RIPEMD160_DIGEST_SIZE,
94 },
95 #ifdef CONFIG_CRYPTO_SM3
96 [QCRYPTO_HASH_ALGO_SM3] = {
97 .setkey = (qcrypto_nettle_hmac_setkey)hmac_sm3_set_key,
98 .update = (qcrypto_nettle_hmac_update)hmac_sm3_update,
99 .digest = (qcrypto_nettle_hmac_digest)hmac_sm3_digest,
100 .len = SM3_DIGEST_SIZE,
101 },
102 #endif
103 };
104
105 bool qcrypto_hmac_supports(QCryptoHashAlgo alg)
106 {
107 if (alg < G_N_ELEMENTS(qcrypto_hmac_alg_map) &&
108 qcrypto_hmac_alg_map[alg].setkey != NULL) {
109 return true;
110 }
111
112 return false;
113 }
114
115 void *qcrypto_hmac_ctx_new(QCryptoHashAlgo alg,
116 const uint8_t *key, size_t nkey,
117 Error **errp)
118 {
119 QCryptoHmacNettle *ctx;
120
121 if (!qcrypto_hmac_supports(alg)) {
122 error_setg(errp, "Unsupported hmac algorithm %s",
123 QCryptoHashAlgo_str(alg));
124 return NULL;
125 }
126
127 ctx = g_new0(QCryptoHmacNettle, 1);
128
129 qcrypto_hmac_alg_map[alg].setkey(&ctx->u, nkey, key);
130
131 return ctx;
132 }
133
134 static void
135 qcrypto_nettle_hmac_ctx_free(QCryptoHmac *hmac)
136 {
137 QCryptoHmacNettle *ctx;
138
139 ctx = hmac->opaque;
140 g_free(ctx);
141 }
142
143 static int
144 qcrypto_nettle_hmac_bytesv(QCryptoHmac *hmac,
145 const struct iovec *iov,
146 size_t niov,
147 uint8_t **result,
148 size_t *resultlen,
149 Error **errp)
150 {
151 QCryptoHmacNettle *ctx;
152 size_t i;
153
154 ctx = (QCryptoHmacNettle *)hmac->opaque;
155
156 for (i = 0; i < niov; ++i) {
157 size_t len = iov[i].iov_len;
158 uint8_t *base = iov[i].iov_base;
159 while (len) {
160 size_t shortlen = MIN(len, UINT_MAX);
161 qcrypto_hmac_alg_map[hmac->alg].update(&ctx->u, len, base);
162 len -= shortlen;
163 base += len;
164 }
165 }
166
167 if (resultlen == NULL) {
168 return 0;
169 } else if (*resultlen == 0) {
170 *resultlen = qcrypto_hmac_alg_map[hmac->alg].len;
171 *result = g_new0(uint8_t, *resultlen);
172 } else if (*resultlen != qcrypto_hmac_alg_map[hmac->alg].len) {
173 error_setg(errp,
174 "Result buffer size %zu is smaller than hash %zu",
175 *resultlen, qcrypto_hmac_alg_map[hmac->alg].len);
176 return -1;
177 }
178
179 qcrypto_hmac_alg_map[hmac->alg].digest(&ctx->u, *resultlen, *result);
180
181 return 0;
182 }
183
184 QCryptoHmacDriver qcrypto_hmac_lib_driver = {
185 .hmac_bytesv = qcrypto_nettle_hmac_bytesv,
186 .hmac_free = qcrypto_nettle_hmac_ctx_free,
187 };