This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / fs / ecryptfs / debug.c

diff --git a/fs/ecryptfs/debug.c b/fs/ecryptfs/debug.c
new file mode 100644 (file)
index 0000000..61f8e89
--- /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");
+}
+