i386/kvm: introduce tsc_is_stable_and_known()
[qemu/ar7.git] / crypto / hmac-glib.c
bloba6c1730291bced0a7c7bb5bd3ad7e56460a9e947
1 /*
2 * QEMU Crypto hmac algorithms (based on glib)
4 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
6 * Authors:
7 * Longpeng(Mike) <longpeng2@huawei.com>
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.
15 #include "qemu/osdep.h"
16 #include "qapi/error.h"
17 #include "crypto/hmac.h"
18 #include "hmacpriv.h"
20 /* Support for HMAC Algos has been added in GLib 2.30 */
21 #if GLIB_CHECK_VERSION(2, 30, 0)
23 static int qcrypto_hmac_alg_map[QCRYPTO_HASH_ALG__MAX] = {
24 [QCRYPTO_HASH_ALG_MD5] = G_CHECKSUM_MD5,
25 [QCRYPTO_HASH_ALG_SHA1] = G_CHECKSUM_SHA1,
26 [QCRYPTO_HASH_ALG_SHA256] = G_CHECKSUM_SHA256,
27 /* Support for HMAC SHA-512 in GLib 2.42 */
28 #if GLIB_CHECK_VERSION(2, 42, 0)
29 [QCRYPTO_HASH_ALG_SHA512] = G_CHECKSUM_SHA512,
30 #else
31 [QCRYPTO_HASH_ALG_SHA512] = -1,
32 #endif
33 [QCRYPTO_HASH_ALG_SHA224] = -1,
34 [QCRYPTO_HASH_ALG_SHA384] = -1,
35 [QCRYPTO_HASH_ALG_RIPEMD160] = -1,
38 typedef struct QCryptoHmacGlib QCryptoHmacGlib;
39 struct QCryptoHmacGlib {
40 GHmac *ghmac;
43 bool qcrypto_hmac_supports(QCryptoHashAlgorithm alg)
45 if (alg < G_N_ELEMENTS(qcrypto_hmac_alg_map) &&
46 qcrypto_hmac_alg_map[alg] != -1) {
47 return true;
50 return false;
53 void *qcrypto_hmac_ctx_new(QCryptoHashAlgorithm alg,
54 const uint8_t *key, size_t nkey,
55 Error **errp)
57 QCryptoHmacGlib *ctx;
59 if (!qcrypto_hmac_supports(alg)) {
60 error_setg(errp, "Unsupported hmac algorithm %s",
61 QCryptoHashAlgorithm_str(alg));
62 return NULL;
65 ctx = g_new0(QCryptoHmacGlib, 1);
67 ctx->ghmac = g_hmac_new(qcrypto_hmac_alg_map[alg],
68 (const uint8_t *)key, nkey);
69 if (!ctx->ghmac) {
70 error_setg(errp, "Cannot initialize hmac and set key");
71 goto error;
74 return ctx;
76 error:
77 g_free(ctx);
78 return NULL;
81 static void
82 qcrypto_glib_hmac_ctx_free(QCryptoHmac *hmac)
84 QCryptoHmacGlib *ctx;
86 ctx = hmac->opaque;
87 g_hmac_unref(ctx->ghmac);
89 g_free(ctx);
92 static int
93 qcrypto_glib_hmac_bytesv(QCryptoHmac *hmac,
94 const struct iovec *iov,
95 size_t niov,
96 uint8_t **result,
97 size_t *resultlen,
98 Error **errp)
100 QCryptoHmacGlib *ctx;
101 int i, ret;
103 ctx = hmac->opaque;
105 for (i = 0; i < niov; i++) {
106 g_hmac_update(ctx->ghmac, iov[i].iov_base, iov[i].iov_len);
109 ret = g_checksum_type_get_length(qcrypto_hmac_alg_map[hmac->alg]);
110 if (ret < 0) {
111 error_setg(errp, "Unable to get hmac length");
112 return -1;
115 if (*resultlen == 0) {
116 *resultlen = ret;
117 *result = g_new0(uint8_t, *resultlen);
118 } else if (*resultlen != ret) {
119 error_setg(errp, "Result buffer size %zu is smaller than hmac %d",
120 *resultlen, ret);
121 return -1;
124 g_hmac_get_digest(ctx->ghmac, *result, resultlen);
126 return 0;
129 #else
131 bool qcrypto_hmac_supports(QCryptoHashAlgorithm alg)
133 return false;
136 void *qcrypto_hmac_ctx_new(QCryptoHashAlgorithm alg,
137 const uint8_t *key, size_t nkey,
138 Error **errp)
140 return NULL;
143 static void
144 qcrypto_glib_hmac_ctx_free(QCryptoHmac *hmac)
146 return;
149 static int
150 qcrypto_glib_hmac_bytesv(QCryptoHmac *hmac,
151 const struct iovec *iov,
152 size_t niov,
153 uint8_t **result,
154 size_t *resultlen,
155 Error **errp)
157 return -1;
160 #endif
162 QCryptoHmacDriver qcrypto_hmac_lib_driver = {
163 .hmac_bytesv = qcrypto_glib_hmac_bytesv,
164 .hmac_free = qcrypto_glib_hmac_ctx_free,