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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/crypto/asymmetric_keys/public_key.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/crypto/asymmetric_keys/public_key.c')
-rw-r--r--kernel/crypto/asymmetric_keys/public_key.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/kernel/crypto/asymmetric_keys/public_key.c b/kernel/crypto/asymmetric_keys/public_key.c
new file mode 100644
index 000000000..2f6e4fb1a
--- /dev/null
+++ b/kernel/crypto/asymmetric_keys/public_key.c
@@ -0,0 +1,129 @@
+/* In-software asymmetric public-key crypto subtype
+ *
+ * See Documentation/crypto/asymmetric-keys.txt
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "PKEY: "fmt
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+#include <keys/asymmetric-subtype.h>
+#include "public_key.h"
+
+MODULE_LICENSE("GPL");
+
+const char *const pkey_algo_name[PKEY_ALGO__LAST] = {
+ [PKEY_ALGO_DSA] = "DSA",
+ [PKEY_ALGO_RSA] = "RSA",
+};
+EXPORT_SYMBOL_GPL(pkey_algo_name);
+
+const struct public_key_algorithm *pkey_algo[PKEY_ALGO__LAST] = {
+#if defined(CONFIG_PUBLIC_KEY_ALGO_RSA) || \
+ defined(CONFIG_PUBLIC_KEY_ALGO_RSA_MODULE)
+ [PKEY_ALGO_RSA] = &RSA_public_key_algorithm,
+#endif
+};
+EXPORT_SYMBOL_GPL(pkey_algo);
+
+const char *const pkey_id_type_name[PKEY_ID_TYPE__LAST] = {
+ [PKEY_ID_PGP] = "PGP",
+ [PKEY_ID_X509] = "X509",
+};
+EXPORT_SYMBOL_GPL(pkey_id_type_name);
+
+/*
+ * Provide a part of a description of the key for /proc/keys.
+ */
+static void public_key_describe(const struct key *asymmetric_key,
+ struct seq_file *m)
+{
+ struct public_key *key = asymmetric_key->payload.data;
+
+ if (key)
+ seq_printf(m, "%s.%s",
+ pkey_id_type_name[key->id_type], key->algo->name);
+}
+
+/*
+ * Destroy a public key algorithm key.
+ */
+void public_key_destroy(void *payload)
+{
+ struct public_key *key = payload;
+ int i;
+
+ if (key) {
+ for (i = 0; i < ARRAY_SIZE(key->mpi); i++)
+ mpi_free(key->mpi[i]);
+ kfree(key);
+ }
+}
+EXPORT_SYMBOL_GPL(public_key_destroy);
+
+/*
+ * Verify a signature using a public key.
+ */
+int public_key_verify_signature(const struct public_key *pk,
+ const struct public_key_signature *sig)
+{
+ const struct public_key_algorithm *algo;
+
+ BUG_ON(!pk);
+ BUG_ON(!pk->mpi[0]);
+ BUG_ON(!pk->mpi[1]);
+ BUG_ON(!sig);
+ BUG_ON(!sig->digest);
+ BUG_ON(!sig->mpi[0]);
+
+ algo = pk->algo;
+ if (!algo) {
+ if (pk->pkey_algo >= PKEY_ALGO__LAST)
+ return -ENOPKG;
+ algo = pkey_algo[pk->pkey_algo];
+ if (!algo)
+ return -ENOPKG;
+ }
+
+ if (!algo->verify_signature)
+ return -ENOTSUPP;
+
+ if (sig->nr_mpi != algo->n_sig_mpi) {
+ pr_debug("Signature has %u MPI not %u\n",
+ sig->nr_mpi, algo->n_sig_mpi);
+ return -EINVAL;
+ }
+
+ return algo->verify_signature(pk, sig);
+}
+EXPORT_SYMBOL_GPL(public_key_verify_signature);
+
+static int public_key_verify_signature_2(const struct key *key,
+ const struct public_key_signature *sig)
+{
+ const struct public_key *pk = key->payload.data;
+ return public_key_verify_signature(pk, sig);
+}
+
+/*
+ * Public key algorithm asymmetric key subtype
+ */
+struct asymmetric_key_subtype public_key_subtype = {
+ .owner = THIS_MODULE,
+ .name = "public_key",
+ .name_len = sizeof("public_key") - 1,
+ .describe = public_key_describe,
+ .destroy = public_key_destroy,
+ .verify_signature = public_key_verify_signature_2,
+};
+EXPORT_SYMBOL_GPL(public_key_subtype);