block: add missing coroutine_fn annotations
[qemu.git] / crypto / hmac-glib.c
blob509bbc74c2c7968a1d31010b6815b32da50f5995
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 static int qcrypto_hmac_alg_map[QCRYPTO_HASH_ALG__MAX] = {
21 [QCRYPTO_HASH_ALG_MD5] = G_CHECKSUM_MD5,
22 [QCRYPTO_HASH_ALG_SHA1] = G_CHECKSUM_SHA1,
23 [QCRYPTO_HASH_ALG_SHA256] = G_CHECKSUM_SHA256,
24 [QCRYPTO_HASH_ALG_SHA512] = G_CHECKSUM_SHA512,
25 [QCRYPTO_HASH_ALG_SHA224] = -1,
26 [QCRYPTO_HASH_ALG_SHA384] = -1,
27 [QCRYPTO_HASH_ALG_RIPEMD160] = -1,
30 typedef struct QCryptoHmacGlib QCryptoHmacGlib;
31 struct QCryptoHmacGlib {
32 GHmac *ghmac;
35 bool qcrypto_hmac_supports(QCryptoHashAlgorithm alg)
37 if (alg < G_N_ELEMENTS(qcrypto_hmac_alg_map) &&
38 qcrypto_hmac_alg_map[alg] != -1) {
39 return true;
42 return false;
45 void *qcrypto_hmac_ctx_new(QCryptoHashAlgorithm alg,
46 const uint8_t *key, size_t nkey,
47 Error **errp)
49 QCryptoHmacGlib *ctx;
51 if (!qcrypto_hmac_supports(alg)) {
52 error_setg(errp, "Unsupported hmac algorithm %s",
53 QCryptoHashAlgorithm_str(alg));
54 return NULL;
57 ctx = g_new0(QCryptoHmacGlib, 1);
59 ctx->ghmac = g_hmac_new(qcrypto_hmac_alg_map[alg],
60 (const uint8_t *)key, nkey);
61 if (!ctx->ghmac) {
62 error_setg(errp, "Cannot initialize hmac and set key");
63 goto error;
66 return ctx;
68 error:
69 g_free(ctx);
70 return NULL;
73 static void
74 qcrypto_glib_hmac_ctx_free(QCryptoHmac *hmac)
76 QCryptoHmacGlib *ctx;
78 ctx = hmac->opaque;
79 g_hmac_unref(ctx->ghmac);
81 g_free(ctx);
84 static int
85 qcrypto_glib_hmac_bytesv(QCryptoHmac *hmac,
86 const struct iovec *iov,
87 size_t niov,
88 uint8_t **result,
89 size_t *resultlen,
90 Error **errp)
92 QCryptoHmacGlib *ctx;
93 int i, ret;
95 ctx = hmac->opaque;
97 for (i = 0; i < niov; i++) {
98 g_hmac_update(ctx->ghmac, iov[i].iov_base, iov[i].iov_len);
101 ret = g_checksum_type_get_length(qcrypto_hmac_alg_map[hmac->alg]);
102 if (ret < 0) {
103 error_setg(errp, "Unable to get hmac length");
104 return -1;
107 if (*resultlen == 0) {
108 *resultlen = ret;
109 *result = g_new0(uint8_t, *resultlen);
110 } else if (*resultlen != ret) {
111 error_setg(errp, "Result buffer size %zu is smaller than hmac %d",
112 *resultlen, ret);
113 return -1;
116 g_hmac_get_digest(ctx->ghmac, *result, resultlen);
118 return 0;
121 QCryptoHmacDriver qcrypto_hmac_lib_driver = {
122 .hmac_bytesv = qcrypto_glib_hmac_bytesv,
123 .hmac_free = qcrypto_glib_hmac_ctx_free,