2 * QEMU Crypto af_alg-backend hash/hmac support
4 * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
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.
13 #include "qemu/osdep.h"
15 #include "qemu/sockets.h"
16 #include "qapi/error.h"
17 #include "crypto/hash.h"
18 #include "crypto/hmac.h"
23 qcrypto_afalg_hash_format_name(QCryptoHashAlgorithm alg,
31 case QCRYPTO_HASH_ALG_MD5:
34 case QCRYPTO_HASH_ALG_SHA1:
37 case QCRYPTO_HASH_ALG_SHA224:
40 case QCRYPTO_HASH_ALG_SHA256:
43 case QCRYPTO_HASH_ALG_SHA384:
46 case QCRYPTO_HASH_ALG_SHA512:
49 case QCRYPTO_HASH_ALG_RIPEMD160:
54 error_setg(errp, "Unsupported hash algorithm %d", alg);
59 name = g_strdup_printf("hmac(%s)", alg_name);
61 name = g_strdup_printf("%s", alg_name);
68 qcrypto_afalg_hash_hmac_ctx_new(QCryptoHashAlgorithm alg,
69 const uint8_t *key, size_t nkey,
70 bool is_hmac, Error **errp)
75 name = qcrypto_afalg_hash_format_name(alg, is_hmac, errp);
80 afalg = qcrypto_afalg_comm_alloc(AFALG_TYPE_HASH, name, errp);
88 /* HMAC needs setkey */
90 if (setsockopt(afalg->tfmfd, SOL_ALG, ALG_SET_KEY,
92 error_setg_errno(errp, errno, "Set hmac key failed");
93 qcrypto_afalg_comm_free(afalg);
101 static QCryptoAFAlg *
102 qcrypto_afalg_hash_ctx_new(QCryptoHashAlgorithm alg,
105 return qcrypto_afalg_hash_hmac_ctx_new(alg, NULL, 0, false, errp);
109 qcrypto_afalg_hmac_ctx_new(QCryptoHashAlgorithm alg,
110 const uint8_t *key, size_t nkey,
113 return qcrypto_afalg_hash_hmac_ctx_new(alg, key, nkey, true, errp);
117 qcrypto_afalg_hash_hmac_bytesv(QCryptoAFAlg *hmac,
118 QCryptoHashAlgorithm alg,
119 const struct iovec *iov,
120 size_t niov, uint8_t **result,
127 bool is_hmac = (hmac != NULL) ? true : false;
128 const int expect_len = qcrypto_hash_digest_len(alg);
130 if (*resultlen == 0) {
131 *resultlen = expect_len;
132 *result = g_new0(uint8_t, *resultlen);
133 } else if (*resultlen != expect_len) {
135 "Result buffer size %zu is not match hash %d",
136 *resultlen, expect_len);
143 afalg = qcrypto_afalg_hash_ctx_new(alg, errp);
149 /* send data to kernel's crypto core */
150 ret = iov_send_recv(afalg->opfd, iov, niov,
151 0, iov_size(iov, niov), true);
153 error_setg_errno(errp, errno, "Send data to afalg-core failed");
157 /* hash && get result */
158 outv.iov_base = *result;
159 outv.iov_len = *resultlen;
160 ret = iov_send_recv(afalg->opfd, &outv, 1,
161 0, iov_size(&outv, 1), false);
163 error_setg_errno(errp, errno, "Recv result from afalg-core failed");
170 qcrypto_afalg_comm_free(afalg);
176 qcrypto_afalg_hash_bytesv(QCryptoHashAlgorithm alg,
177 const struct iovec *iov,
178 size_t niov, uint8_t **result,
182 return qcrypto_afalg_hash_hmac_bytesv(NULL, alg, iov, niov, result,
187 qcrypto_afalg_hmac_bytesv(QCryptoHmac *hmac,
188 const struct iovec *iov,
189 size_t niov, uint8_t **result,
193 return qcrypto_afalg_hash_hmac_bytesv(hmac->opaque, hmac->alg,
194 iov, niov, result, resultlen,
198 static void qcrypto_afalg_hmac_ctx_free(QCryptoHmac *hmac)
202 afalg = hmac->opaque;
203 qcrypto_afalg_comm_free(afalg);
206 QCryptoHashDriver qcrypto_hash_afalg_driver = {
207 .hash_bytesv = qcrypto_afalg_hash_bytesv,
210 QCryptoHmacDriver qcrypto_hmac_afalg_driver = {
211 .hmac_bytesv = qcrypto_afalg_hmac_bytesv,
212 .hmac_free = qcrypto_afalg_hmac_ctx_free,