fx_crypt_aes.cpp File Reference

(0ccf980226462398d5097987466bcffd8236e1e9)

#include "core/fdrm/fx_crypt_aes.h"
#include "core/fxcrt/byteorder.h"
#include "core/fxcrt/check.h"
#include "core/fxcrt/check_op.h"
#include "core/fxcrt/compiler_specific.h"
#include "core/fxcrt/fx_memcpy_wrappers.h"

Include dependency graph for fx_crypt_aes.cpp:

Go to the source code of this file.

Macros
#define	mulby2(x)
#define	ADD_ROUND_KEY_4()
#define	MOVEWORD(i)
#define	FMAKEWORD(i)
#define	LASTWORD(i)
#define	FMAKEWORD(i)
#define	LASTWORD(i)

Functions
void	CRYPT_AESSetKey (CRYPT_aes_context *ctx, const uint8_t *key, uint32_t keylen)
void	CRYPT_AESSetIV (CRYPT_aes_context *ctx, const uint8_t *iv)
void	CRYPT_AESDecrypt (CRYPT_aes_context *ctx, uint8_t *dest, const uint8_t *src, uint32_t size)
void	CRYPT_AESEncrypt (CRYPT_aes_context *ctx, pdfium::span< uint8_t > dest, pdfium::span< const uint8_t > src)

Macro Definition Documentation

ADD_ROUND_KEY_4

#define ADD_ROUND_KEY_4

(

)

Value:

  UNSAFE_TODO((block[0] ^= *keysched++, block[1] ^= *keysched++, \
               block[2] ^= *keysched++, block[3] ^= *keysched++))

Definition at line 434 of file fx_crypt_aes.cpp.

FMAKEWORD [1/2]

#define FMAKEWORD

(

i

)

Value:

  UNSAFE_TODO((newstate[i] = (E0[(block[i] >> 24) & 0xFF] ^             \
                              E1[(block[(i + C1) % Nb] >> 16) & 0xFF] ^ \
                              E2[(block[(i + C2) % Nb] >> 8) & 0xFF] ^  \
                              E3[block[(i + C3) % Nb] & 0xFF])))

Definition at line 438 of file fx_crypt_aes.cpp.

FMAKEWORD [2/2]

#define FMAKEWORD

(

i

)

Value:

  UNSAFE_TODO((newstate[i] = (D0[(block[i] >> 24) & 0xFF] ^             \
                              D1[(block[(i + C1) % Nb] >> 16) & 0xFF] ^ \
                              D2[(block[(i + C2) % Nb] >> 8) & 0xFF] ^  \
                              D3[block[(i + C3) % Nb] & 0xFF])))

Definition at line 438 of file fx_crypt_aes.cpp.

LASTWORD [1/2]

#define LASTWORD

(

i

)

Value:

  UNSAFE_TODO(                                                           \
      (newstate[i] = (Sbox[(block[i] >> 24) & 0xFF] << 24) |             \
                     (Sbox[(block[(i + C1) % Nb] >> 16) & 0xFF] << 16) | \
                     (Sbox[(block[(i + C2) % Nb] >> 8) & 0xFF] << 8) |   \
                     (Sbox[(block[(i + C3) % Nb]) & 0xFF])))

Definition at line 443 of file fx_crypt_aes.cpp.

LASTWORD [2/2]

#define LASTWORD

(

i

)

Value:

  UNSAFE_TODO(                                                              \
      (newstate[i] = (Sboxinv[(block[i] >> 24) & 0xFF] << 24) |             \
                     (Sboxinv[(block[(i + C1) % Nb] >> 16) & 0xFF] << 16) | \
                     (Sboxinv[(block[(i + C2) % Nb] >> 8) & 0xFF] << 8) |   \
                     (Sboxinv[(block[(i + C3) % Nb]) & 0xFF])))

Definition at line 443 of file fx_crypt_aes.cpp.

MOVEWORD

#define MOVEWORD

(

i

)

Value:

UNSAFE_TODO((block[i] = newstate[i]))

Definition at line 437 of file fx_crypt_aes.cpp.

mulby2

#define mulby2

(

x

)

Value:

(((x & 0x7F) << 1) ^ (x & 0x80 ? 0x1B : 0))

Definition at line 15 of file fx_crypt_aes.cpp.

Function Documentation

CRYPT_AESDecrypt()

void CRYPT_AESDecrypt	(	CRYPT_aes_context *	ctx,
		uint8_t *	dest,
		const uint8_t *	src,
		uint32_t	size )

Definition at line 594 of file fx_crypt_aes.cpp.

References fxcrt::PutUInt32MSBFirst().

Here is the call graph for this function:

CRYPT_AESEncrypt()

void CRYPT_AESEncrypt	(	CRYPT_aes_context *	ctx,
		pdfium::span< uint8_t >	dest,
		pdfium::span< const uint8_t >	src )

Definition at line 624 of file fx_crypt_aes.cpp.

CRYPT_AESSetIV()

void CRYPT_AESSetIV	(	CRYPT_aes_context *	ctx,
		const uint8_t *	iv )

Definition at line 586 of file fx_crypt_aes.cpp.

References CRYPT_aes_context::Nb.

CRYPT_AESSetKey()

void CRYPT_AESSetKey	(	CRYPT_aes_context *	ctx,
		const uint8_t *	key,
		uint32_t	keylen )

Definition at line 530 of file fx_crypt_aes.cpp.

References CRYPT_aes_context::Nb, and CRYPT_aes_context::Nr.