Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20170103-1' into staging
[qemu.git] / crypto / hmac.c
1 /*
2 * QEMU Crypto hmac algorithms
3 *
4 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * (at your option) any later version. See the COPYING file in the
8 * top-level directory.
9 *
10 */
11
12 #include "qemu/osdep.h"
13 #include "qapi/error.h"
14 #include "crypto/hmac.h"
15
16 static const char hex[] = "0123456789abcdef";
17
18 int qcrypto_hmac_bytes(QCryptoHmac *hmac,
19 const char *buf,
20 size_t len,
21 uint8_t **result,
22 size_t *resultlen,
23 Error **errp)
24 {
25 struct iovec iov = {
26 .iov_base = (char *)buf,
27 .iov_len = len
28 };
29
30 return qcrypto_hmac_bytesv(hmac, &iov, 1, result, resultlen, errp);
31 }
32
33 int qcrypto_hmac_digestv(QCryptoHmac *hmac,
34 const struct iovec *iov,
35 size_t niov,
36 char **digest,
37 Error **errp)
38 {
39 uint8_t *result = NULL;
40 size_t resultlen = 0;
41 size_t i;
42
43 if (qcrypto_hmac_bytesv(hmac, iov, niov, &result, &resultlen, errp) < 0) {
44 return -1;
45 }
46
47 *digest = g_new0(char, (resultlen * 2) + 1);
48
49 for (i = 0 ; i < resultlen ; i++) {
50 (*digest)[(i * 2)] = hex[(result[i] >> 4) & 0xf];
51 (*digest)[(i * 2) + 1] = hex[result[i] & 0xf];
52 }
53
54 (*digest)[resultlen * 2] = '\0';
55
56 g_free(result);
57 return 0;
58 }
59
60 int qcrypto_hmac_digest(QCryptoHmac *hmac,
61 const char *buf,
62 size_t len,
63 char **digest,
64 Error **errp)
65 {
66 struct iovec iov = {
67 .iov_base = (char *)buf,
68 .iov_len = len
69 };
70
71 return qcrypto_hmac_digestv(hmac, &iov, 1, digest, errp);
72 }