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Daniel P. Berrange37788f22015-10-14 13:14:04 +01001/*
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
Thomas Huthb7cbb872019-02-13 16:54:59 +01009 * version 2.1 of the License, or (at your option) any later version.
Daniel P. Berrange37788f22015-10-14 13:14:04 +010010 *
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"
Markus Armbrustera9c94272016-06-22 19:11:19 +020022#include <nettle/pbkdf2.h>
Daniel P. Berrange533008f2016-09-07 13:12:28 +010023#include <nettle/hmac.h>
Markus Armbrusterda34e652016-03-14 09:01:28 +010024#include "qapi/error.h"
Daniel P. Berrange37788f22015-10-14 13:14:04 +010025#include "crypto/pbkdf.h"
Daniel P. Berrange37788f22015-10-14 13:14:04 +010026
27
28bool qcrypto_pbkdf2_supports(QCryptoHashAlgorithm hash)
29{
30 switch (hash) {
31 case QCRYPTO_HASH_ALG_SHA1:
Daniel P. Berrange533008f2016-09-07 13:12:28 +010032 case QCRYPTO_HASH_ALG_SHA224:
Daniel P. Berrange37788f22015-10-14 13:14:04 +010033 case QCRYPTO_HASH_ALG_SHA256:
Daniel P. Berrange533008f2016-09-07 13:12:28 +010034 case QCRYPTO_HASH_ALG_SHA384:
35 case QCRYPTO_HASH_ALG_SHA512:
36 case QCRYPTO_HASH_ALG_RIPEMD160:
Daniel P. Berrange37788f22015-10-14 13:14:04 +010037 return true;
38 default:
39 return false;
40 }
41}
42
43int qcrypto_pbkdf2(QCryptoHashAlgorithm hash,
44 const uint8_t *key, size_t nkey,
45 const uint8_t *salt, size_t nsalt,
Daniel P. Berrange59b060b2016-09-12 12:50:12 +010046 uint64_t iterations,
Daniel P. Berrange37788f22015-10-14 13:14:04 +010047 uint8_t *out, size_t nout,
48 Error **errp)
49{
Daniel P. Berrange533008f2016-09-07 13:12:28 +010050 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
Daniel P. Berrange59b060b2016-09-12 12:50:12 +010060 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 }
Daniel P. Berrange533008f2016-09-07 13:12:28 +010066
Daniel P. Berrange37788f22015-10-14 13:14:04 +010067 switch (hash) {
Daniel P. Berrange533008f2016-09-07 13:12:28 +010068 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
Daniel P. Berrange37788f22015-10-14 13:14:04 +010074 case QCRYPTO_HASH_ALG_SHA1:
Daniel P. Berrange533008f2016-09-07 13:12:28 +010075 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);
Daniel P. Berrange37788f22015-10-14 13:14:04 +010084 break;
85
86 case QCRYPTO_HASH_ALG_SHA256:
Daniel P. Berrange533008f2016-09-07 13:12:28 +010087 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);
Daniel P. Berrange37788f22015-10-14 13:14:04 +0100108 break;
109
110 default:
111 error_setg_errno(errp, ENOSYS,
Daniel P. Berrange533008f2016-09-07 13:12:28 +0100112 "PBKDF does not support hash algorithm %s",
Markus Armbruster977c7362017-08-24 10:46:08 +0200113 QCryptoHashAlgorithm_str(hash));
Daniel P. Berrange37788f22015-10-14 13:14:04 +0100114 return -1;
115 }
116 return 0;
117}