aboutsummaryrefslogtreecommitdiff
path: root/crypto
diff options
context:
space:
mode:
Diffstat (limited to 'crypto')
-rw-r--r--crypto/Makefile.objs3
-rw-r--r--crypto/hash-gcrypt.c106
-rw-r--r--crypto/hash-nettle.c126
-rw-r--r--crypto/hash-stub.c41
-rw-r--r--crypto/hash.c105
5 files changed, 276 insertions, 105 deletions
diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs
index 0737f48118..1f86f4f07f 100644
--- a/crypto/Makefile.objs
+++ b/crypto/Makefile.objs
@@ -1,5 +1,7 @@
crypto-obj-y = init.o
crypto-obj-y += hash.o
+crypto-obj-$(CONFIG_NETTLE) += hash-nettle.o
+crypto-obj-$(if $(CONFIG_NETTLE),n,$(CONFIG_GCRYPT)) += hash-gcrypt.o
crypto-obj-y += aes.o
crypto-obj-y += desrfb.o
crypto-obj-y += cipher.o
@@ -28,3 +30,4 @@ crypto-aes-obj-y = aes.o
stub-obj-y += random-stub.o
stub-obj-y += pbkdf-stub.o
+stub-obj-y += hash-stub.o
diff --git a/crypto/hash-gcrypt.c b/crypto/hash-gcrypt.c
new file mode 100644
index 0000000000..e0456897ac
--- /dev/null
+++ b/crypto/hash-gcrypt.c
@@ -0,0 +1,106 @@
+/*
+ * 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 "gcrypt.h"
+
+
+static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALG__MAX] = {
+ [QCRYPTO_HASH_ALG_MD5] = GCRY_MD_MD5,
+ [QCRYPTO_HASH_ALG_SHA1] = GCRY_MD_SHA1,
+ [QCRYPTO_HASH_ALG_SHA256] = GCRY_MD_SHA256,
+};
+
+gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg)
+{
+ if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map) &&
+ qcrypto_hash_alg_map[alg] != GCRY_MD_NONE) {
+ return true;
+ }
+ return false;
+}
+
+
+int qcrypto_hash_bytesv(QCryptoHashAlgorithm alg,
+ const struct iovec *iov,
+ size_t niov,
+ uint8_t **result,
+ size_t *resultlen,
+ Error **errp)
+{
+ int i, ret;
+ gcry_md_hd_t md;
+ unsigned char *digest;
+
+ if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_map) ||
+ qcrypto_hash_alg_map[alg] == GCRY_MD_NONE) {
+ error_setg(errp,
+ "Unknown hash algorithm %d",
+ alg);
+ return -1;
+ }
+
+ ret = gcry_md_open(&md, qcrypto_hash_alg_map[alg], 0);
+
+ if (ret < 0) {
+ error_setg(errp,
+ "Unable to initialize hash algorithm: %s",
+ gcry_strerror(ret));
+ return -1;
+ }
+
+ for (i = 0; i < niov; i++) {
+ gcry_md_write(md, iov[i].iov_base, iov[i].iov_len);
+ }
+
+ ret = gcry_md_get_algo_dlen(qcrypto_hash_alg_map[alg]);
+ if (ret <= 0) {
+ error_setg(errp,
+ "Unable to get hash length: %s",
+ gcry_strerror(ret));
+ 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;
+ }
+
+ digest = gcry_md_read(md, 0);
+ if (!digest) {
+ error_setg(errp,
+ "No digest produced");
+ goto error;
+ }
+ memcpy(*result, digest, *resultlen);
+
+ gcry_md_close(md);
+ return 0;
+
+ error:
+ gcry_md_close(md);
+ return -1;
+}
diff --git a/crypto/hash-nettle.c b/crypto/hash-nettle.c
new file mode 100644
index 0000000000..8ec5572aff
--- /dev/null
+++ b/crypto/hash-nettle.c
@@ -0,0 +1,126 @@
+/*
+ * 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 <nettle/md5.h>
+#include <nettle/sha.h>
+
+typedef void (*qcrypto_nettle_init)(void *ctx);
+typedef void (*qcrypto_nettle_write)(void *ctx,
+ unsigned int len,
+ const uint8_t *buf);
+typedef void (*qcrypto_nettle_result)(void *ctx,
+ unsigned int len,
+ uint8_t *buf);
+
+union qcrypto_hash_ctx {
+ struct md5_ctx md5;
+ struct sha1_ctx sha1;
+ struct sha256_ctx sha256;
+};
+
+struct qcrypto_hash_alg {
+ qcrypto_nettle_init init;
+ qcrypto_nettle_write write;
+ qcrypto_nettle_result result;
+ size_t len;
+} qcrypto_hash_alg_map[] = {
+ [QCRYPTO_HASH_ALG_MD5] = {
+ .init = (qcrypto_nettle_init)md5_init,
+ .write = (qcrypto_nettle_write)md5_update,
+ .result = (qcrypto_nettle_result)md5_digest,
+ .len = MD5_DIGEST_SIZE,
+ },
+ [QCRYPTO_HASH_ALG_SHA1] = {
+ .init = (qcrypto_nettle_init)sha1_init,
+ .write = (qcrypto_nettle_write)sha1_update,
+ .result = (qcrypto_nettle_result)sha1_digest,
+ .len = SHA1_DIGEST_SIZE,
+ },
+ [QCRYPTO_HASH_ALG_SHA256] = {
+ .init = (qcrypto_nettle_init)sha256_init,
+ .write = (qcrypto_nettle_write)sha256_update,
+ .result = (qcrypto_nettle_result)sha256_digest,
+ .len = SHA256_DIGEST_SIZE,
+ },
+};
+
+gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg)
+{
+ if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map) &&
+ qcrypto_hash_alg_map[alg].init != NULL) {
+ return true;
+ }
+ return false;
+}
+
+
+int qcrypto_hash_bytesv(QCryptoHashAlgorithm alg,
+ const struct iovec *iov,
+ size_t niov,
+ uint8_t **result,
+ size_t *resultlen,
+ Error **errp)
+{
+ int i;
+ union qcrypto_hash_ctx ctx;
+
+ if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_map) ||
+ qcrypto_hash_alg_map[alg].init == NULL) {
+ error_setg(errp,
+ "Unknown hash algorithm %d",
+ alg);
+ return -1;
+ }
+
+ qcrypto_hash_alg_map[alg].init(&ctx);
+
+ for (i = 0; i < niov; i++) {
+ /* Some versions of nettle have functions
+ * declared with 'int' instead of 'size_t'
+ * so to be safe avoid writing more than
+ * UINT_MAX bytes at a time
+ */
+ size_t len = iov[i].iov_len;
+ uint8_t *base = iov[i].iov_base;
+ while (len) {
+ size_t shortlen = MIN(len, UINT_MAX);
+ qcrypto_hash_alg_map[alg].write(&ctx, len, base);
+ len -= shortlen;
+ base += len;
+ }
+ }
+
+ if (*resultlen == 0) {
+ *resultlen = qcrypto_hash_alg_map[alg].len;
+ *result = g_new0(uint8_t, *resultlen);
+ } else if (*resultlen != qcrypto_hash_alg_map[alg].len) {
+ error_setg(errp,
+ "Result buffer size %zu is smaller than hash %zu",
+ *resultlen, qcrypto_hash_alg_map[alg].len);
+ return -1;
+ }
+
+ qcrypto_hash_alg_map[alg].result(&ctx, *resultlen, *result);
+
+ return 0;
+}
diff --git a/crypto/hash-stub.c b/crypto/hash-stub.c
new file mode 100644
index 0000000000..8a9b8d4c09
--- /dev/null
+++ b/crypto/hash-stub.c
@@ -0,0 +1,41 @@
+/*
+ * 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"
+
+gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg G_GNUC_UNUSED)
+{
+ return false;
+}
+
+int qcrypto_hash_bytesv(QCryptoHashAlgorithm alg,
+ const struct iovec *iov G_GNUC_UNUSED,
+ size_t niov G_GNUC_UNUSED,
+ uint8_t **result G_GNUC_UNUSED,
+ size_t *resultlen G_GNUC_UNUSED,
+ Error **errp)
+{
+ error_setg(errp,
+ "Hash algorithm %d not supported without GNUTLS",
+ alg);
+ return -1;
+}
diff --git a/crypto/hash.c b/crypto/hash.c
index 2907bffd2e..aa2a26e8a6 100644
--- a/crypto/hash.c
+++ b/crypto/hash.c
@@ -22,12 +22,6 @@
#include "qapi/error.h"
#include "crypto/hash.h"
-#ifdef CONFIG_GNUTLS_HASH
-#include <gnutls/gnutls.h>
-#include <gnutls/crypto.h>
-#endif
-
-
static size_t qcrypto_hash_alg_size[QCRYPTO_HASH_ALG__MAX] = {
[QCRYPTO_HASH_ALG_MD5] = 16,
[QCRYPTO_HASH_ALG_SHA1] = 20,
@@ -41,105 +35,6 @@ size_t qcrypto_hash_digest_len(QCryptoHashAlgorithm alg)
}
-#ifdef CONFIG_GNUTLS_HASH
-static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALG__MAX] = {
- [QCRYPTO_HASH_ALG_MD5] = GNUTLS_DIG_MD5,
- [QCRYPTO_HASH_ALG_SHA1] = GNUTLS_DIG_SHA1,
- [QCRYPTO_HASH_ALG_SHA256] = GNUTLS_DIG_SHA256,
-};
-
-gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg)
-{
- if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map)) {
- return true;
- }
- return false;
-}
-
-
-int qcrypto_hash_bytesv(QCryptoHashAlgorithm alg,
- const struct iovec *iov,
- size_t niov,
- uint8_t **result,
- size_t *resultlen,
- Error **errp)
-{
- int i, ret;
- gnutls_hash_hd_t dig;
-
- if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_map)) {
- error_setg(errp,
- "Unknown hash algorithm %d",
- alg);
- return -1;
- }
-
- ret = gnutls_hash_init(&dig, qcrypto_hash_alg_map[alg]);
-
- if (ret < 0) {
- error_setg(errp,
- "Unable to initialize hash algorithm: %s",
- gnutls_strerror(ret));
- return -1;
- }
-
- for (i = 0; i < niov; i++) {
- ret = gnutls_hash(dig, iov[i].iov_base, iov[i].iov_len);
- if (ret < 0) {
- error_setg(errp,
- "Unable process hash data: %s",
- gnutls_strerror(ret));
- goto error;
- }
- }
-
- ret = gnutls_hash_get_len(qcrypto_hash_alg_map[alg]);
- if (ret <= 0) {
- error_setg(errp,
- "Unable to get hash length: %s",
- gnutls_strerror(ret));
- 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;
- }
-
- gnutls_hash_deinit(dig, *result);
- return 0;
-
- error:
- gnutls_hash_deinit(dig, NULL);
- return -1;
-}
-
-#else /* ! CONFIG_GNUTLS_HASH */
-
-gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg G_GNUC_UNUSED)
-{
- return false;
-}
-
-int qcrypto_hash_bytesv(QCryptoHashAlgorithm alg,
- const struct iovec *iov G_GNUC_UNUSED,
- size_t niov G_GNUC_UNUSED,
- uint8_t **result G_GNUC_UNUSED,
- size_t *resultlen G_GNUC_UNUSED,
- Error **errp)
-{
- error_setg(errp,
- "Hash algorithm %d not supported without GNUTLS",
- alg);
- return -1;
-}
-
-#endif /* ! CONFIG_GNUTLS_HASH */
-
int qcrypto_hash_bytes(QCryptoHashAlgorithm alg,
const char *buf,
size_t len,
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-22 11:34:59 +0000