Added missing tegra files.HEADmaster

1 files changed, 81 insertions, 0 deletions

diff --git a/security/keys/ecryptfs_format.c b/security/keys/ecryptfs_format.c
new file mode 100644
index 00000000000..6daa3b6ff9e
--- /dev/null
+++ b/security/keys/ecryptfs_format.c
@@ -0,0 +1,81 @@
+/*
+ * ecryptfs_format.c: helper functions for the encrypted key type
+ *
+ * Copyright (C) 2006 International Business Machines Corp.
+ * Copyright (C) 2010 Politecnico di Torino, Italy
+ *                    TORSEC group -- http://security.polito.it
+ *
+ * Authors:
+ * Michael A. Halcrow <mahalcro@us.ibm.com>
+ * Tyler Hicks <tyhicks@ou.edu>
+ * Roberto Sassu <roberto.sassu@polito.it>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include "ecryptfs_format.h"
+
+u8 *ecryptfs_get_auth_tok_key(struct ecryptfs_auth_tok *auth_tok)
+{
+        return auth_tok->token.password.session_key_encryption_key;
+}
+EXPORT_SYMBOL(ecryptfs_get_auth_tok_key);
+
+/*
+ * ecryptfs_get_versions()
+ *
+ * Source code taken from the software 'ecryptfs-utils' version 83.
+ *
+ */
+void ecryptfs_get_versions(int *major, int *minor, int *file_version)
+{
+        *major = ECRYPTFS_VERSION_MAJOR;
+        *minor = ECRYPTFS_VERSION_MINOR;
+        if (file_version)
+                *file_version = ECRYPTFS_SUPPORTED_FILE_VERSION;
+}
+EXPORT_SYMBOL(ecryptfs_get_versions);
+
+/*
+ * ecryptfs_fill_auth_tok - fill the ecryptfs_auth_tok structure
+ *
+ * Fill the ecryptfs_auth_tok structure with required ecryptfs data.
+ * The source code is inspired to the original function generate_payload()
+ * shipped with the software 'ecryptfs-utils' version 83.
+ *
+ */
+int ecryptfs_fill_auth_tok(struct ecryptfs_auth_tok *auth_tok,
+                           const char *key_desc)
+{
+        int major, minor;
+
+        ecryptfs_get_versions(&major, &minor, NULL);
+        auth_tok->version = (((uint16_t)(major << 8) & 0xFF00)
+                             | ((uint16_t)minor & 0x00FF));
+        auth_tok->token_type = ECRYPTFS_PASSWORD;
+        strncpy((char *)auth_tok->token.password.signature, key_desc,
+                ECRYPTFS_PASSWORD_SIG_SIZE);
+        auth_tok->token.password.session_key_encryption_key_bytes =
+                ECRYPTFS_MAX_KEY_BYTES;
+        /*
+         * Removed auth_tok->token.password.salt and
+         * auth_tok->token.password.session_key_encryption_key
+         * initialization from the original code
+         */
+        /* TODO: Make the hash parameterizable via policy */
+        auth_tok->token.password.flags |=
+                ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET;
+        /* The kernel code will encrypt the session key. */
+        auth_tok->session_key.encrypted_key[0] = 0;
+        auth_tok->session_key.encrypted_key_size = 0;
+        /* Default; subject to change by kernel eCryptfs */
+        auth_tok->token.password.hash_algo = PGP_DIGEST_ALGO_SHA512;
+        auth_tok->token.password.flags &= ~(ECRYPTFS_PERSISTENT_PASSWORD);
+        return 0;
+}
+EXPORT_SYMBOL(ecryptfs_fill_auth_tok);
+
+MODULE_LICENSE("GPL");