| 1 | |
| 2 | |
| 3 | * eCryptfs: Linux filesystem encryption layer
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| 4 | * Functions only useful for debugging.
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| 5 | *
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| 6 | * Copyright (C) 2006 International Business Machines Corp.
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| 7 | * Author(s): Michael A. Halcrow <[email protected]>
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| 8 |
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| 9 |
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| 10 | #include "ecryptfs_kernel.h"
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| 11 |
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| 12 | |
| 13 | * ecryptfs_dump_auth_tok - debug function to print auth toks
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| 14 | *
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| 15 | * This function will print the contents of an ecryptfs authentication
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| 16 | * token.
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| 17 |
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| 18 | void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok)
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| 19 | {
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| 20 | char salt[ECRYPTFS_SALT_SIZE * 2 + 1];
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| 21 | char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
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| 22 |
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| 23 | ecryptfs_printk(KERN_DEBUG, "Auth tok at mem loc [%p]:\n",
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| 24 | auth_tok);
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| 25 | if (auth_tok->flags & ECRYPTFS_PRIVATE_KEY) {
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| 26 | ecryptfs_printk(KERN_DEBUG, " * private key type\n");
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| 27 | } else {
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| 28 | ecryptfs_printk(KERN_DEBUG, " * passphrase type\n");
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| 29 | ecryptfs_to_hex(salt, auth_tok->token.password.salt,
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| 30 | ECRYPTFS_SALT_SIZE);
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| 31 | salt[ECRYPTFS_SALT_SIZE * 2] = '\0';
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| 32 | ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt);
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| 33 | if (auth_tok->token.password.flags &
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| 34 | ECRYPTFS_PERSISTENT_PASSWORD) {
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| 35 | ecryptfs_printk(KERN_DEBUG, " * persistent\n");
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| 36 | }
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| 37 | memcpy(sig, auth_tok->token.password.signature,
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| 38 | ECRYPTFS_SIG_SIZE_HEX);
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| 39 | sig[ECRYPTFS_SIG_SIZE_HEX] = '\0';
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| 40 | ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig);
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| 41 | }
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| 42 | ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n",
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| 43 | auth_tok->session_key.flags);
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| 44 | if (auth_tok->session_key.flags
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| 45 | & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT)
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| 46 | ecryptfs_printk(KERN_DEBUG,
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| 47 | " * Userspace decrypt request set\n");
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| 48 | if (auth_tok->session_key.flags
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| 49 | & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT)
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| 50 | ecryptfs_printk(KERN_DEBUG,
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| 51 | " * Userspace encrypt request set\n");
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| 52 | if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) {
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| 53 | ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n");
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| 54 | ecryptfs_printk(KERN_DEBUG,
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| 55 | " * session_key.decrypted_key_size = [0x%x]\n",
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| 56 | auth_tok->session_key.decrypted_key_size);
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| 57 | ecryptfs_printk(KERN_DEBUG, " * Decrypted session key "
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| 58 | "dump:\n");
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| 59 | if (ecryptfs_verbosity > 0)
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| 60 | ecryptfs_dump_hex(auth_tok->session_key.decrypted_key,
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| 61 | ECRYPTFS_DEFAULT_KEY_BYTES);
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| 62 | }
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| 63 | if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) {
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| 64 | ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n");
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| 65 | ecryptfs_printk(KERN_DEBUG,
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| 66 | " * session_key.encrypted_key_size = [0x%x]\n",
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| 67 | auth_tok->session_key.encrypted_key_size);
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| 68 | ecryptfs_printk(KERN_DEBUG, " * Encrypted session key "
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| 69 | "dump:\n");
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| 70 | if (ecryptfs_verbosity > 0)
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| 71 | ecryptfs_dump_hex(auth_tok->session_key.encrypted_key,
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| 72 | auth_tok->session_key.
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| 73 | encrypted_key_size);
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| 74 | }
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| 75 | }
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| 76 |
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| 77 | |
| 78 | * ecryptfs_dump_hex - debug hex printer
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| 79 | * @data: string of bytes to be printed
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| 80 | * @bytes: number of bytes to print
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| 81 | *
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| 82 | * Dump hexadecimal representation of char array
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| 83 |
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| 84 | void ecryptfs_dump_hex(char *data, int bytes)
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| 85 | {
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| 86 | if (ecryptfs_verbosity < 1)
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| 87 | return;
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| 88 |
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| 89 | print_hex_dump(KERN_DEBUG, "ecryptfs: ", DUMP_PREFIX_OFFSET, 16, 1,
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| 90 | data, bytes, false);
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| 91 | }
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