virtio-pci: address space translation service (ATS) support
[qemu.git] / crypto / pbkdf-nettle.c
1 /*
2 * QEMU Crypto PBKDF support (Password-Based Key Derivation Function)
3 *
4 * Copyright (c) 2015-2016 Red Hat, Inc.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 *
19 */
20
21 #include "qemu/osdep.h"
22 #include <nettle/pbkdf2.h>
23 #include <nettle/hmac.h>
24 #include "qapi/error.h"
25 #include "crypto/pbkdf.h"
26
27
28 bool qcrypto_pbkdf2_supports(QCryptoHashAlgorithm hash)
29 {
30 switch (hash) {
31 case QCRYPTO_HASH_ALG_SHA1:
32 case QCRYPTO_HASH_ALG_SHA224:
33 case QCRYPTO_HASH_ALG_SHA256:
34 case QCRYPTO_HASH_ALG_SHA384:
35 case QCRYPTO_HASH_ALG_SHA512:
36 case QCRYPTO_HASH_ALG_RIPEMD160:
37 return true;
38 default:
39 return false;
40 }
41 }
42
43 int qcrypto_pbkdf2(QCryptoHashAlgorithm hash,
44 const uint8_t *key, size_t nkey,
45 const uint8_t *salt, size_t nsalt,
46 uint64_t iterations,
47 uint8_t *out, size_t nout,
48 Error **errp)
49 {
50 union {
51 struct hmac_md5_ctx md5;
52 struct hmac_sha1_ctx sha1;
53 struct hmac_sha224_ctx sha224;
54 struct hmac_sha256_ctx sha256;
55 struct hmac_sha384_ctx sha384;
56 struct hmac_sha512_ctx sha512;
57 struct hmac_ripemd160_ctx ripemd160;
58 } ctx;
59
60 if (iterations > UINT_MAX) {
61 error_setg_errno(errp, ERANGE,
62 "PBKDF iterations %llu must be less than %u",
63 (long long unsigned)iterations, UINT_MAX);
64 return -1;
65 }
66
67 switch (hash) {
68 case QCRYPTO_HASH_ALG_MD5:
69 hmac_md5_set_key(&ctx.md5, nkey, key);
70 PBKDF2(&ctx.md5, hmac_md5_update, hmac_md5_digest,
71 MD5_DIGEST_SIZE, iterations, nsalt, salt, nout, out);
72 break;
73
74 case QCRYPTO_HASH_ALG_SHA1:
75 hmac_sha1_set_key(&ctx.sha1, nkey, key);
76 PBKDF2(&ctx.sha1, hmac_sha1_update, hmac_sha1_digest,
77 SHA1_DIGEST_SIZE, iterations, nsalt, salt, nout, out);
78 break;
79
80 case QCRYPTO_HASH_ALG_SHA224:
81 hmac_sha224_set_key(&ctx.sha224, nkey, key);
82 PBKDF2(&ctx.sha224, hmac_sha224_update, hmac_sha224_digest,
83 SHA224_DIGEST_SIZE, iterations, nsalt, salt, nout, out);
84 break;
85
86 case QCRYPTO_HASH_ALG_SHA256:
87 hmac_sha256_set_key(&ctx.sha256, nkey, key);
88 PBKDF2(&ctx.sha256, hmac_sha256_update, hmac_sha256_digest,
89 SHA256_DIGEST_SIZE, iterations, nsalt, salt, nout, out);
90 break;
91
92 case QCRYPTO_HASH_ALG_SHA384:
93 hmac_sha384_set_key(&ctx.sha384, nkey, key);
94 PBKDF2(&ctx.sha384, hmac_sha384_update, hmac_sha384_digest,
95 SHA384_DIGEST_SIZE, iterations, nsalt, salt, nout, out);
96 break;
97
98 case QCRYPTO_HASH_ALG_SHA512:
99 hmac_sha512_set_key(&ctx.sha512, nkey, key);
100 PBKDF2(&ctx.sha512, hmac_sha512_update, hmac_sha512_digest,
101 SHA512_DIGEST_SIZE, iterations, nsalt, salt, nout, out);
102 break;
103
104 case QCRYPTO_HASH_ALG_RIPEMD160:
105 hmac_ripemd160_set_key(&ctx.ripemd160, nkey, key);
106 PBKDF2(&ctx.ripemd160, hmac_ripemd160_update, hmac_ripemd160_digest,
107 RIPEMD160_DIGEST_SIZE, iterations, nsalt, salt, nout, out);
108 break;
109
110 default:
111 error_setg_errno(errp, ENOSYS,
112 "PBKDF does not support hash algorithm %s",
113 QCryptoHashAlgorithm_lookup[hash]);
114 return -1;
115 }
116 return 0;
117 }