cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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pbkdf-nettle.c (4002B)

      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 2.1 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
     28bool 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
     43int 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_str(hash));
    114        return -1;
    115    }
    116    return 0;
    117}