ps3_crypto.c File Reference

#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <aaruformat.h>
#include "../lib/aes128.h"
#include "ps3_crypto.h"
#include "ps3_encryption_map.h"

Go to the source code of this file.

Functions
void	ps3_derive_disc_key (const uint8_t data1[16], uint8_t disc_key[16])
	Derive a PS3 disc key from a data1 key.
void	ps3_derive_iv (uint64_t sector_num, uint8_t iv[16])
	Derive the per-sector AES IV from a sector number.
void	ps3_encrypt_sector (const uint8_t disc_key[16], uint64_t sector_num, uint8_t *data, uint32_t length)
	Encrypt a sector using PS3 disc encryption (AES-128-CBC).
void	ps3_decrypt_sector (const uint8_t disc_key[16], uint64_t sector_num, uint8_t *data, uint32_t length)
	Decrypt a sector using PS3 disc encryption (AES-128-CBC).
void	ps3_lazy_init (aaruformat_context *ctx)
	Lazy-initialize PS3 encryption state from context media tags.

Variables
static const uint8_t	PS3_ERK [16]
static const uint8_t	PS3_ERK_IV [16]

Function Documentation

ps3_decrypt_sector()

void ps3_decrypt_sector	(	const uint8_t	disc_key[16],
		uint64_t	sector_num,
		uint8_t *	data,
		uint32_t	length )

Decrypt a sector using PS3 disc encryption (AES-128-CBC).

Parameters

disc_key	16-byte disc key.
sector_num	Sector number (for IV derivation).
data	Buffer to decrypt in-place.
length	Number of bytes (must be multiple of 16).

Definition at line 63 of file ps3_crypto.c.

References aes128_cbc_decrypt(), and ps3_derive_iv().

Referenced by aaruf_write_sector().

ps3_derive_disc_key()

void ps3_derive_disc_key	(	const uint8_t	data1[16],
		uint8_t	disc_key[16] )

Derive a PS3 disc key from a data1 key.

disc_key = AES-128-CBC-Encrypt(PS3_ERK, PS3_ERK_IV, data1)

Parameters

data1	16-byte data1 key (from disc or IRD).
disc_key	Output: 16-byte derived disc key.

Definition at line 39 of file ps3_crypto.c.

References aes128_cbc_encrypt(), PS3_ERK, and PS3_ERK_IV.

Referenced by ps3_lazy_init().

ps3_derive_iv()

void ps3_derive_iv	(	uint64_t	sector_num,
		uint8_t	iv[16] )

Derive the per-sector AES IV from a sector number.

IV = sector number as 128-bit big-endian integer, zero-padded left.

Parameters

sector_num	Sector number.
iv	Output: 16-byte IV buffer.

Definition at line 45 of file ps3_crypto.c.

Referenced by ps3_decrypt_sector(), and ps3_encrypt_sector().

ps3_encrypt_sector()

void ps3_encrypt_sector	(	const uint8_t	disc_key[16],
		uint64_t	sector_num,
		uint8_t *	data,
		uint32_t	length )

Encrypt a sector using PS3 disc encryption (AES-128-CBC).

Parameters

disc_key	16-byte disc key.
sector_num	Sector number (for IV derivation).
data	Buffer to encrypt in-place.
length	Number of bytes (must be multiple of 16).

Definition at line 56 of file ps3_crypto.c.

References aes128_cbc_encrypt(), and ps3_derive_iv().

Referenced by aaruf_read_sector().

ps3_lazy_init()

void ps3_lazy_init

(

aaruformat_context *

ctx

)

Lazy-initialize PS3 encryption state from context media tags.

Reads kMediaTagPs3DiscKey and kMediaTagPs3EncryptionMap from the context's media tag hash table. Safe to call multiple times (no-op after first init). On failure, leaves fields NULL so callers degrade gracefully.

Parameters

ctx	The aaruformat context.

Definition at line 70 of file ps3_crypto.c.

References mediaTagEntry::data, kMediaTagPs3Data1, kMediaTagPs3DiscKey, kMediaTagPs3EncryptionMap, mediaTagEntry::length, aaruformat_context::mediaTags, ps3_derive_disc_key(), ps3_deserialize_encryption_map(), aaruformat_context::ps3_disc_key, aaruformat_context::ps3_plaintext_region_count, and aaruformat_context::ps3_plaintext_regions.

Referenced by aaruf_read_sector(), and aaruf_write_sector().

Variable Documentation

PS3_ERK

const uint8_t PS3_ERK[16]

static

Initial value:

= {0x38, 0x0B, 0xCF, 0x0B, 0x53, 0x45, 0x5B, 0x3C,
       0x78, 0x17, 0xAB, 0x4F, 0xA3, 0xBA, 0x90, 0xED}

Definition at line 32 of file ps3_crypto.c.

Referenced by ps3_derive_disc_key().

PS3_ERK_IV

const uint8_t PS3_ERK_IV[16]

static

Initial value:

= {0x69, 0x47, 0x47, 0x72, 0xAF, 0x6F, 0xDA, 0xB3,
       0x42, 0x74, 0x3A, 0xEF, 0xAA, 0x18, 0x62, 0x87}

Definition at line 36 of file ps3_crypto.c.

Referenced by ps3_derive_disc_key().