1 files changed, 123 insertions, 0 deletions

diff --git a/fs/ecryptfs/debug.c b/fs/ecryptfs/debug.c
new file mode 100644
index 000000000000..61f8e894284f
--- /dev/null
+++ b/fs/ecryptfs/debug.c
@@ -0,0 +1,123 @@
+/**
+ * eCryptfs: Linux filesystem encryption layer
+ * Functions only useful for debugging.
+ *
+ * Copyright (C) 2006 International Business Machines Corp.
+ *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
+ *
+ * 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; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "ecryptfs_kernel.h"
+
+/**
+ * ecryptfs_dump_auth_tok - debug function to print auth toks
+ *
+ * This function will print the contents of an ecryptfs authentication
+ * token.
+ */
+void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok)
+{
+        char salt[ECRYPTFS_SALT_SIZE * 2 + 1];
+        char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
+
+        ecryptfs_printk(KERN_DEBUG, "Auth tok at mem loc [%p]:\n",
+                        auth_tok);
+        if (ECRYPTFS_CHECK_FLAG(auth_tok->flags, ECRYPTFS_PRIVATE_KEY)) {
+                ecryptfs_printk(KERN_DEBUG, " * private key type\n");
+                ecryptfs_printk(KERN_DEBUG, " * (NO PRIVATE KEY SUPPORT "
+                                "IN ECRYPTFS VERSION 0.1)\n");
+        } else {
+                ecryptfs_printk(KERN_DEBUG, " * passphrase type\n");
+                ecryptfs_to_hex(salt, auth_tok->token.password.salt,
+                                ECRYPTFS_SALT_SIZE);
+                salt[ECRYPTFS_SALT_SIZE * 2] = '\0';
+                ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt);
+                if (ECRYPTFS_CHECK_FLAG(auth_tok->token.password.flags,
+                                        ECRYPTFS_PERSISTENT_PASSWORD)) {
+                        ecryptfs_printk(KERN_DEBUG, " * persistent\n");
+                }
+                memcpy(sig, auth_tok->token.password.signature,
+                       ECRYPTFS_SIG_SIZE_HEX);
+                sig[ECRYPTFS_SIG_SIZE_HEX] = '\0';
+                ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig);
+        }
+        ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n",
+                        auth_tok->session_key.flags);
+        if (auth_tok->session_key.flags
+            & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT)
+                ecryptfs_printk(KERN_DEBUG,
+                                " * Userspace decrypt request set\n");
+        if (auth_tok->session_key.flags
+            & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT)
+                ecryptfs_printk(KERN_DEBUG,
+                                " * Userspace encrypt request set\n");
+        if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) {
+                ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n");
+                ecryptfs_printk(KERN_DEBUG,
+                                " * session_key.decrypted_key_size = [0x%x]\n",
+                                auth_tok->session_key.decrypted_key_size);
+                ecryptfs_printk(KERN_DEBUG, " * Decrypted session key "
+                                "dump:\n");
+                if (ecryptfs_verbosity > 0)
+                        ecryptfs_dump_hex(auth_tok->session_key.decrypted_key,
+                                          ECRYPTFS_DEFAULT_KEY_BYTES);
+        }
+        if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) {
+                ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n");
+                ecryptfs_printk(KERN_DEBUG,
+                                " * session_key.encrypted_key_size = [0x%x]\n",
+                                auth_tok->session_key.encrypted_key_size);
+                ecryptfs_printk(KERN_DEBUG, " * Encrypted session key "
+                                "dump:\n");
+                if (ecryptfs_verbosity > 0)
+                        ecryptfs_dump_hex(auth_tok->session_key.encrypted_key,
+                                          auth_tok->session_key.
+                                          encrypted_key_size);
+        }
+}
+
+/**
+ * ecryptfs_dump_hex - debug hex printer
+ * @data: string of bytes to be printed
+ * @bytes: number of bytes to print
+ *
+ * Dump hexadecimal representation of char array
+ */
+void ecryptfs_dump_hex(char *data, int bytes)
+{
+        int i = 0;
+        int add_newline = 1;
+
+        if (ecryptfs_verbosity < 1)
+                return;
+        if (bytes != 0) {
+                printk(KERN_DEBUG "0x%.2x.", (unsigned char)data[i]);
+                i++;
+        }
+        while (i < bytes) {
+                printk("0x%.2x.", (unsigned char)data[i]);
+                i++;
+                if (i % 16 == 0) {
+                        printk("\n");
+                        add_newline = 0;
+                } else
+                        add_newline = 1;
+        }
+        if (add_newline)
+                printk("\n");
+}
+