/* * QEMU Crypto hash algorithms * * Copyright (c) 2016 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. * */ #include "qemu/osdep.h" #include "qapi/error.h" #include "crypto/hash.h" #include "hashpriv.h" static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALG__MAX] = { [QCRYPTO_HASH_ALG_MD5] = G_CHECKSUM_MD5, [QCRYPTO_HASH_ALG_SHA1] = G_CHECKSUM_SHA1, [QCRYPTO_HASH_ALG_SHA224] = -1, [QCRYPTO_HASH_ALG_SHA256] = G_CHECKSUM_SHA256, [QCRYPTO_HASH_ALG_SHA384] = -1, #if GLIB_CHECK_VERSION(2, 36, 0) [QCRYPTO_HASH_ALG_SHA512] = G_CHECKSUM_SHA512, #else [QCRYPTO_HASH_ALG_SHA512] = -1, #endif [QCRYPTO_HASH_ALG_RIPEMD160] = -1, }; gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg) { if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map) && qcrypto_hash_alg_map[alg] != -1) { return true; } return false; } static int qcrypto_glib_hash_bytesv(QCryptoHashAlgorithm alg, const struct iovec *iov, size_t niov, uint8_t **result, size_t *resultlen, Error **errp) { int i, ret; GChecksum *cs; if (!qcrypto_hash_supports(alg)) { error_setg(errp, "Unknown hash algorithm %d", alg); return -1; } cs = g_checksum_new(qcrypto_hash_alg_map[alg]); for (i = 0; i < niov; i++) { g_checksum_update(cs, iov[i].iov_base, iov[i].iov_len); } ret = g_checksum_type_get_length(qcrypto_hash_alg_map[alg]); if (ret < 0) { error_setg(errp, "%s", "Unable to get hash length"); goto error; } if (*resultlen == 0) { *resultlen = ret; *result = g_new0(uint8_t, *resultlen); } else if (*resultlen != ret) { error_setg(errp, "Result buffer size %zu is smaller than hash %d", *resultlen, ret); goto error; } g_checksum_get_digest(cs, *result, resultlen); g_checksum_free(cs); return 0; error: g_checksum_free(cs); return -1; } QCryptoHashDriver qcrypto_hash_lib_driver = { .hash_bytesv = qcrypto_glib_hash_bytesv, };