mtpz.c(3)

NAME
mtpz.c

SYNOPSIS

#include 'config.h'
#include 'libmtp.h'
#include 'unicode.h'
#include 'ptp.h'
#include 'libusb-glue.h'
#include 'device-flags.h'
#include 'playlist-spl.h'
#include 'util.h'
#include 'mtpz.h'
#include <gcrypt.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <errno.h>

  Data Structures
struct mtpz_rsa_struct

  Macros
#define MTPZ_HASHSTATE_84 5
#define MTPZ_HASHSTATE_88 6
#define MTPZ_ENCRYPTIONLOBYTE(val)
#define MTPZ_ENCRYPTIONBYTE1(val)
#define MTPZ_ENCRYPTIONBYTE2(val)
#define MTPZ_ENCRYPTIONBYTE3(val)
#define MTPZ_SWAP(x)

  Typedefs
typedef struct mtpz_rsa_struct mtpz_rsa_t

  Functions
int mtpz_loaddata ()
mtpz_rsa_t * mtpz_rsa_init (const unsigned char *modulus, const unsigned char *priv_key, const unsigned char *pub_exp)
void mtpz_rsa_free (mtpz_rsa_t *)
int mtpz_rsa_decrypt (int flen, unsigned char *from, int tlen, unsigned char *to, mtpz_rsa_t *rsa)
int mtpz_rsa_sign (int flen, unsigned char *from, int tlen, unsigned char *to, mtpz_rsa_t *rsa)
void mtpz_encryption_cipher (unsigned char *data, unsigned int len, char encrypt)
void mtpz_encryption_cipher_advanced (unsigned char *key, unsigned int key_len, unsigned char *data, unsigned int data_len, char encrypt)
unsigned char * mtpz_encryption_expand_key (unsigned char *constant, int key_len, int count, int *out_len)
void mtpz_encryption_expand_key_inner (unsigned char *constant, int key_len, unsigned char **out, int *out_len)
void mtpz_encryption_inv_mix_columns (unsigned char *expanded, int offset, int rounds)
void mtpz_encryption_decrypt_custom (unsigned char *data, unsigned char *seed, unsigned char *expanded)
void mtpz_encryption_encrypt_custom (unsigned char *data, unsigned char *seed, unsigned char *expanded)
void mtpz_encryption_encrypt_mac (unsigned char *hash, unsigned int hash_length, unsigned char *seed, unsigned int seed_len, unsigned char *out)
uint16_t ptp_mtpz_handshake (PTPParams *params)

  Variables
unsigned char mtpz_aes_rcon []
unsigned char mtpz_aes_sbox []
unsigned char mtpz_aes_invsbox []
unsigned int mtpz_aes_ft1 []
unsigned int mtpz_aes_ft2 []
unsigned int mtpz_aes_ft3 []
unsigned int mtpz_aes_ft4 []
unsigned int mtpz_aes_rt1 []
unsigned int mtpz_aes_rt2 []
unsigned int mtpz_aes_rt3 []
unsigned int mtpz_aes_rt4 []
unsigned int mtpz_aes_gb11 []
unsigned int mtpz_aes_gb14 []
unsigned int mtpz_aes_gb13 []
unsigned int mtpz_aes_gb9 []

Detailed Description

Copyright (C) 2011-2012 Sajid Anwar sajidanwar94@gmail.com

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This library 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

This file provides mtp zune cryptographic setup interfaces. It is also used with Windows Phone 7, but Microsoft/Nokiad seem to have discontinued MTPZ on Windows Phone 8.

DISCLAIMER:

The intention of this implementation is for users to be able to interoperate with their devices, i.e. copy music to them in operating systems other than Microsoft Windows, so it can be played back on the device. We do not provide encryption keys and constants in libmtp, we never will. You have to have these on file in your home directory in $HOME/.mtpz-data, and we suggest that you talk to Microsoft about providing the proper numbers if you want to use this facility.

Macro Definition Documentation

  #define MTPZ_ENCRYPTIONBYTE1( val)
Value:
(((val) >> 16) & 0xFF)

  #define MTPZ_ENCRYPTIONBYTE2( val)
Value:
(((val) >>  8) & 0xFF)

  #define MTPZ_ENCRYPTIONBYTE3( val)
Value:
(((val) >>  0) & 0xFF)

  #define MTPZ_ENCRYPTIONLOBYTE( val)
Value:
(((val) >> 24) & 0xFF)

  #define MTPZ_SWAP( x)
Value:
mtpz_bswap32(x)

Variable Documentation

  unsigned char mtpz_aes_invsbox
Initial value:
=
{
        0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38,  0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB,
        0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87,  0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB,
        0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D,  0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,
        0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2,  0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25,
        0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16,  0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92,
        0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA,  0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,
        0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A,  0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06,
        0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02,  0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,
        0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA,  0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,
        0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85,  0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E,
        0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89,  0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B,
        0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20,  0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,
        0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31,  0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,
        0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D,  0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF,
        0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0,  0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,
        0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26,  0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D
}

  unsigned char mtpz_aes_rcon
Initial value:
=
{
        0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a
}

  unsigned char mtpz_aes_sbox
Initial value:
=
{
        0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01,
        0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d,
        0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4,
        0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
        0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7,
        0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2,
        0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e,
        0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
        0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb,
        0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb,
        0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c,
        0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
        0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c,
        0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d,
        0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a,
        0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
        0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3,
        0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d,
        0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a,
        0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
        0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e,
        0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9,
        0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9,
        0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
        0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99,
        0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
}

Author

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