qxl: check release info object
[qemu.git] / crypto / hash-afalg.c
1 /*
2 * QEMU Crypto af_alg-backend hash/hmac support
3 *
4 * Copyright (c) 2017 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 #include "qemu/osdep.h"
14 #include "qemu/iov.h"
15 #include "qemu/sockets.h"
16 #include "qemu-common.h"
17 #include "qapi/error.h"
18 #include "crypto/hash.h"
19 #include "crypto/hmac.h"
20 #include "hashpriv.h"
21 #include "hmacpriv.h"
22
23 static char *
24 qcrypto_afalg_hash_format_name(QCryptoHashAlgorithm alg,
25 bool is_hmac,
26 Error **errp)
27 {
28 char *name;
29 const char *alg_name;
30
31 switch (alg) {
32 case QCRYPTO_HASH_ALG_MD5:
33 alg_name = "md5";
34 break;
35 case QCRYPTO_HASH_ALG_SHA1:
36 alg_name = "sha1";
37 break;
38 case QCRYPTO_HASH_ALG_SHA224:
39 alg_name = "sha224";
40 break;
41 case QCRYPTO_HASH_ALG_SHA256:
42 alg_name = "sha256";
43 break;
44 case QCRYPTO_HASH_ALG_SHA384:
45 alg_name = "sha384";
46 break;
47 case QCRYPTO_HASH_ALG_SHA512:
48 alg_name = "sha512";
49 break;
50 case QCRYPTO_HASH_ALG_RIPEMD160:
51 alg_name = "rmd160";
52 break;
53
54 default:
55 error_setg(errp, "Unsupported hash algorithm %d", alg);
56 return NULL;
57 }
58
59 if (is_hmac) {
60 name = g_strdup_printf("hmac(%s)", alg_name);
61 } else {
62 name = g_strdup_printf("%s", alg_name);
63 }
64
65 return name;
66 }
67
68 static QCryptoAFAlg *
69 qcrypto_afalg_hash_hmac_ctx_new(QCryptoHashAlgorithm alg,
70 const uint8_t *key, size_t nkey,
71 bool is_hmac, Error **errp)
72 {
73 QCryptoAFAlg *afalg;
74 char *name;
75
76 name = qcrypto_afalg_hash_format_name(alg, is_hmac, errp);
77 if (!name) {
78 return NULL;
79 }
80
81 afalg = qcrypto_afalg_comm_alloc(AFALG_TYPE_HASH, name, errp);
82 if (!afalg) {
83 g_free(name);
84 return NULL;
85 }
86
87 g_free(name);
88
89 /* HMAC needs setkey */
90 if (is_hmac) {
91 if (qemu_setsockopt(afalg->tfmfd, SOL_ALG, ALG_SET_KEY,
92 key, nkey) != 0) {
93 error_setg_errno(errp, errno, "Set hmac key failed");
94 qcrypto_afalg_comm_free(afalg);
95 return NULL;
96 }
97 }
98
99 return afalg;
100 }
101
102 static QCryptoAFAlg *
103 qcrypto_afalg_hash_ctx_new(QCryptoHashAlgorithm alg,
104 Error **errp)
105 {
106 return qcrypto_afalg_hash_hmac_ctx_new(alg, NULL, 0, false, errp);
107 }
108
109 QCryptoAFAlg *
110 qcrypto_afalg_hmac_ctx_new(QCryptoHashAlgorithm alg,
111 const uint8_t *key, size_t nkey,
112 Error **errp)
113 {
114 return qcrypto_afalg_hash_hmac_ctx_new(alg, key, nkey, true, errp);
115 }
116
117 static int
118 qcrypto_afalg_hash_hmac_bytesv(QCryptoAFAlg *hmac,
119 QCryptoHashAlgorithm alg,
120 const struct iovec *iov,
121 size_t niov, uint8_t **result,
122 size_t *resultlen,
123 Error **errp)
124 {
125 QCryptoAFAlg *afalg;
126 struct iovec outv;
127 int ret = 0;
128 bool is_hmac = (hmac != NULL) ? true : false;
129 const int expect_len = qcrypto_hash_digest_len(alg);
130
131 if (*resultlen == 0) {
132 *resultlen = expect_len;
133 *result = g_new0(uint8_t, *resultlen);
134 } else if (*resultlen != expect_len) {
135 error_setg(errp,
136 "Result buffer size %zu is not match hash %d",
137 *resultlen, expect_len);
138 return -1;
139 }
140
141 if (is_hmac) {
142 afalg = hmac;
143 } else {
144 afalg = qcrypto_afalg_hash_ctx_new(alg, errp);
145 if (!afalg) {
146 return -1;
147 }
148 }
149
150 /* send data to kernel's crypto core */
151 ret = iov_send_recv(afalg->opfd, iov, niov,
152 0, iov_size(iov, niov), true);
153 if (ret < 0) {
154 error_setg_errno(errp, errno, "Send data to afalg-core failed");
155 goto out;
156 }
157
158 /* hash && get result */
159 outv.iov_base = *result;
160 outv.iov_len = *resultlen;
161 ret = iov_send_recv(afalg->opfd, &outv, 1,
162 0, iov_size(&outv, 1), false);
163 if (ret < 0) {
164 error_setg_errno(errp, errno, "Recv result from afalg-core failed");
165 } else {
166 ret = 0;
167 }
168
169 out:
170 if (!is_hmac) {
171 qcrypto_afalg_comm_free(afalg);
172 }
173 return ret;
174 }
175
176 static int
177 qcrypto_afalg_hash_bytesv(QCryptoHashAlgorithm alg,
178 const struct iovec *iov,
179 size_t niov, uint8_t **result,
180 size_t *resultlen,
181 Error **errp)
182 {
183 return qcrypto_afalg_hash_hmac_bytesv(NULL, alg, iov, niov, result,
184 resultlen, errp);
185 }
186
187 static int
188 qcrypto_afalg_hmac_bytesv(QCryptoHmac *hmac,
189 const struct iovec *iov,
190 size_t niov, uint8_t **result,
191 size_t *resultlen,
192 Error **errp)
193 {
194 return qcrypto_afalg_hash_hmac_bytesv(hmac->opaque, hmac->alg,
195 iov, niov, result, resultlen,
196 errp);
197 }
198
199 static void qcrypto_afalg_hmac_ctx_free(QCryptoHmac *hmac)
200 {
201 QCryptoAFAlg *afalg;
202
203 afalg = hmac->opaque;
204 qcrypto_afalg_comm_free(afalg);
205 }
206
207 QCryptoHashDriver qcrypto_hash_afalg_driver = {
208 .hash_bytesv = qcrypto_afalg_hash_bytesv,
209 };
210
211 QCryptoHmacDriver qcrypto_hmac_afalg_driver = {
212 .hmac_bytesv = qcrypto_afalg_hmac_bytesv,
213 .hmac_free = qcrypto_afalg_hmac_ctx_free,
214 };