drms.c File Reference

Include dependency graph for drms.c:

Data Structures
struct	aes_s
struct	shuffle_s
struct	drms_s
Defines
#define	Digest   DigestMD5
#define	SWAP(a, b)   { (a) ^= (b); (b) ^= (a); (a) ^= (b); }
#define	REVERSE(p, n)
#define	ROT13(c)
#define	DRMS_DIRNAME   ".drms"
#define	ISCINFO   "iSCInfo"
#define	PROD_NAME   "iPod"
#define	VENDOR_NAME   "Apple Computer, Inc."
Functions
static void	InitAES (struct aes_s *, uint32_t *)
static void	DecryptAES (struct aes_s *, uint32_t *, const uint32_t *)
static void	InitShuffle (struct shuffle_s *, uint32_t *, uint32_t)
static void	DoShuffle (struct shuffle_s *, uint32_t *, uint32_t)
static uint32_t	FirstPass (uint32_t *)
static void	SecondPass (uint32_t *, uint32_t)
static void	ThirdPass (uint32_t *)
static void	FourthPass (uint32_t *)
static void	TinyShuffle1 (uint32_t *)
static void	TinyShuffle2 (uint32_t *)
static void	TinyShuffle3 (uint32_t *)
static void	TinyShuffle4 (uint32_t *)
static void	TinyShuffle5 (uint32_t *)
static void	TinyShuffle6 (uint32_t *)
static void	TinyShuffle7 (uint32_t *)
static void	TinyShuffle8 (uint32_t *)
static void	DoExtShuffle (uint32_t *)
static int	GetSystemKey (uint32_t *, bool)
static int	WriteUserKey (void *, uint32_t *)
static int	ReadUserKey (void *, uint32_t *)
static int	GetUserKey (void *, uint32_t *)
static int	GetSCIData (char *, uint32_t **, uint32_t *)
static int	HashSystemInfo (uint32_t *)
static int	GetiPodID (int64_t *)
static void	BlockXOR (uint32_t *p_dest, uint32_t *p_s1, uint32_t *p_s2)
void *	drms_alloc (const char *psz_homedir)
void	drms_free (void *_p_drms)
void	drms_decrypt (void *_p_drms, uint32_t *p_buffer, uint32_t i_bytes, uint32_t *p_key)
void	drms_get_p_key (void *_p_drms, uint32_t *p_key)
int	drms_init (void *_p_drms, uint32_t i_type, uint8_t *p_info, uint32_t i_len)

---

Define Documentation

#define Digest   DigestMD5

#define DRMS_DIRNAME   ".drms"

Referenced by ReadUserKey(), and WriteUserKey().

#define ISCINFO   "iSCInfo"

Referenced by GetSCIData().

#define PROD_NAME   "iPod"

Referenced by GetiPodID().

#define REVERSE	(	p,
		n		)

#define ROT13

(

c

)

Value:

(((c)>='A'&&(c)<='Z')?(((c)-'A'+13)%26)+'A':\
                      ((c)>='a'&&(c)<='z')?(((c)-'a'+13)%26)+'a':c)

Referenced by DoShuffle().

#define SWAP	(	a,
		b		)	{ (a) ^= (b); (b) ^= (a); (a) ^= (b); }

Referenced by FourthPass(), ThirdPass(), TinyShuffle6(), TinyShuffle7(), and TinyShuffle8().

#define VENDOR_NAME   "Apple Computer, Inc."

Referenced by GetiPodID().

---

Function Documentation

static void BlockXOR	(	uint32_t *	p_dest,
		uint32_t *	p_s1,
		uint32_t *	p_s2
	)			[inline, static]

Referenced by drms_decrypt(), and GetUserKey().

static void DecryptAES	(	struct aes_s *	p_aes,
		uint32_t *	p_dest,
		const uint32_t *	p_src
	)			[static]

References AES_KEY_COUNT, AES_XOR_ROR, p_aes_decrypt, p_aes_itable, aes_s::pp_dec_keys, and aes_s::pp_enc_keys.

Referenced by drms_decrypt(), and GetUserKey().

static void DoExtShuffle

(

uint32_t *

p_bordel

)

[static]

References FirstPass(), FourthPass(), SecondPass(), and ThirdPass().

Referenced by DoShuffle().

static void DoShuffle	(	struct shuffle_s *	p_shuffle,
		uint32_t *	p_buffer,
		uint32_t	i_size
	)			[static]

References AddMD5(), DoExtShuffle(), EndMD5(), shuffle_s::i_version, InitMD5(), shuffle_s::p_bordel, shuffle_s::p_commands, md5_s::p_digest, p_shuffle_add, p_shuffle_sub, p_shuffle_xor, REVERSE, ROT13, and U32_AT().

Referenced by GetUserKey().

void* drms_alloc

(

const char *

psz_homedir

)

References drms_s::psz_homedir.

Referenced by MP4_ReadBox_sample_soun(), and MP4_ReadBox_sample_vide().

void drms_decrypt	(	void *	_p_drms,
		uint32_t *	p_buffer,
		uint32_t	i_bytes,
		uint32_t *	p_key
	)

References drms_s::aes, BlockXOR(), DecryptAES(), drms_s::p_key, and REVERSE.

Referenced by Demux(), and drms_init().

void drms_free

(

void *

_p_drms

)

References drms_s::p_name.

Referenced by MP4_FreeBox_sample_soun(), MP4_FreeBox_sample_vide(), and MP4_ReadBox_drms().

void drms_get_p_key	(	void *	_p_drms,
		uint32_t *	p_key
	)

References drms_s::p_key.

Referenced by Demux().

int drms_init	(	void *	_p_drms,
		uint32_t	i_type,
		uint8_t *	p_info,
		uint32_t	i_len
	)

References AddMD5(), drms_s::aes, drms_decrypt(), EndMD5(), FOURCC_iviv, FOURCC_key, FOURCC_name, FOURCC_priv, FOURCC_user, GetUserKey(), drms_s::i_key, drms_s::i_user, InitAES(), InitMD5(), md5_s::p_digest, drms_s::p_iviv, drms_s::p_key, drms_s::p_name, REVERSE, strdup(), and U32_AT().

Referenced by MP4_ReadBox_drms().

static uint32_t FirstPass

(

uint32_t *

p_bordel

)

[static]

References TinyShuffle1(), and TinyShuffle2().

Referenced by DoExtShuffle().

static void FourthPass

(

uint32_t *

p_bordel

)

[static]

References SWAP, TinyShuffle7(), and TinyShuffle8().

Referenced by DoExtShuffle().

static int GetiPodID

(

int64_t *

p_ipod_id

)

[static]

References getenv(), PROD_NAME, strtoll(), value, and VENDOR_NAME.

Referenced by GetSystemKey().

static int GetSCIData	(	char *	psz_ipod,
		uint32_t **	pp_sci,
		uint32_t *	pi_sci_size
	)			[static]

References config_GetConfDir(), ISCINFO, and vlc_fopen().

Referenced by GetUserKey().

static int GetSystemKey	(	uint32_t *	p_sys_key,
		bool	b_ipod
	)			[static]

References AddMD5(), EndMD5(), GetiPodID(), HashSystemInfo(), InitMD5(), md5_s::p_digest, and U64_AT().

Referenced by GetUserKey().

static int GetUserKey	(	void *	_p_drms,
		uint32_t *	p_user_key
	)			[static]

References BlockXOR(), DecryptAES(), DoShuffle(), getenv(), GetSCIData(), GetSystemKey(), drms_s::i_key, drms_s::i_user, InitAES(), InitShuffle(), ReadUserKey(), REVERSE, U32_AT(), and WriteUserKey().

Referenced by drms_init().

static int HashSystemInfo

(

uint32_t *

p_system_hash

)

[static]

References AddMD5(), EndMD5(), InitMD5(), and md5_s::p_digest.

Referenced by GetSystemKey().

static void InitAES	(	struct aes_s *	p_aes,
		uint32_t *	p_key
	)			[static]

References AES_KEY_COUNT, AES_ROR, p_aes_encrypt, p_aes_table, aes_s::pp_dec_keys, and aes_s::pp_enc_keys.

Referenced by drms_init(), and GetUserKey().

static void InitShuffle	(	struct shuffle_s *	p_shuffle,
		uint32_t *	p_sys_key,
		uint32_t	i_version
	)			[static]

References AddMD5(), EndMD5(), shuffle_s::i_version, InitMD5(), shuffle_s::p_bordel, shuffle_s::p_commands, md5_s::p_digest, REVERSE, and U32_AT().

Referenced by GetUserKey().

static int ReadUserKey	(	void *	_p_drms,
		uint32_t *	p_user_key
	)			[static]

References DRMS_DIRNAME, drms_s::i_key, drms_s::i_user, drms_s::psz_homedir, and vlc_fopen().

Referenced by GetUserKey().

static void SecondPass	(	uint32_t *	p_bordel,
		uint32_t	i_tmp
	)			[static]

References TinyShuffle3(), TinyShuffle4(), and TinyShuffle5().

Referenced by DoExtShuffle().

static void ThirdPass

(

uint32_t *

p_bordel

)

[static]

References SWAP, and TinyShuffle6().

Referenced by DoExtShuffle().

static void TinyShuffle1

(

uint32_t *

p_bordel

)

[static]

Referenced by FirstPass().

static void TinyShuffle2

(

uint32_t *

p_bordel

)

[static]

Referenced by FirstPass().

static void TinyShuffle3

(

uint32_t *

p_bordel

)

[static]

Referenced by SecondPass().

static void TinyShuffle4

(

uint32_t *

p_bordel

)

[static]

Referenced by SecondPass().

static void TinyShuffle5

(

uint32_t *

p_bordel

)

[static]

Referenced by SecondPass().

static void TinyShuffle6

(

uint32_t *

p_bordel

)

[static]

References SWAP.

Referenced by ThirdPass().

static void TinyShuffle7

(

uint32_t *

p_bordel

)

[static]

References SWAP.

Referenced by FourthPass().

static void TinyShuffle8

(

uint32_t *

p_bordel

)

[static]

References __MIN, and SWAP.

Referenced by FourthPass().

static int WriteUserKey	(	void *	_p_drms,
		uint32_t *	p_user_key
	)			[static]

References DRMS_DIRNAME, drms_s::i_key, drms_s::i_user, drms_s::psz_homedir, and vlc_fopen().

Referenced by GetUserKey().