Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20210330' into...
[qemu/ar7.git] / crypto / hash-afalg.c
blobcf34c694af6f57d92cd22f5f77ee01313d3666aa
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"
23 static char *
24 qcrypto_afalg_hash_format_name(QCryptoHashAlgorithm alg,
25                                bool is_hmac,
26                                Error **errp)
28     char *name;
29     const char *alg_name;
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;
54     default:
55         error_setg(errp, "Unsupported hash algorithm %d", alg);
56         return NULL;
57     }
59     if (is_hmac) {
60         name = g_strdup_printf("hmac(%s)", alg_name);
61     } else {
62         name = g_strdup_printf("%s", alg_name);
63     }
65     return name;
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)
73     QCryptoAFAlg *afalg;
74     char *name;
76     name = qcrypto_afalg_hash_format_name(alg, is_hmac, errp);
77     if (!name) {
78         return NULL;
79     }
81     afalg = qcrypto_afalg_comm_alloc(AFALG_TYPE_HASH, name, errp);
82     if (!afalg) {
83         g_free(name);
84         return NULL;
85     }
87     g_free(name);
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     }
99     return afalg;
102 static QCryptoAFAlg *
103 qcrypto_afalg_hash_ctx_new(QCryptoHashAlgorithm alg,
104                            Error **errp)
106     return qcrypto_afalg_hash_hmac_ctx_new(alg, NULL, 0, false, errp);
109 QCryptoAFAlg *
110 qcrypto_afalg_hmac_ctx_new(QCryptoHashAlgorithm alg,
111                            const uint8_t *key, size_t nkey,
112                            Error **errp)
114     return qcrypto_afalg_hash_hmac_ctx_new(alg, key, nkey, true, errp);
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)
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);
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     }
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     }
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     }
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     }
169 out:
170     if (!is_hmac) {
171         qcrypto_afalg_comm_free(afalg);
172     }
173     return ret;
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)
183     return qcrypto_afalg_hash_hmac_bytesv(NULL, alg, iov, niov, result,
184                                           resultlen, errp);
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)
194     return qcrypto_afalg_hash_hmac_bytesv(hmac->opaque, hmac->alg,
195                                           iov, niov, result, resultlen,
196                                           errp);
199 static void qcrypto_afalg_hmac_ctx_free(QCryptoHmac *hmac)
201     QCryptoAFAlg *afalg;
203     afalg = hmac->opaque;
204     qcrypto_afalg_comm_free(afalg);
207 QCryptoHashDriver qcrypto_hash_afalg_driver = {
208     .hash_bytesv = qcrypto_afalg_hash_bytesv,
211 QCryptoHmacDriver qcrypto_hmac_afalg_driver = {
212     .hmac_bytesv = qcrypto_afalg_hmac_bytesv,
213     .hmac_free = qcrypto_afalg_hmac_ctx_free,