Class which implements AES-CBC (Cipher block chaining) decryption. More...

#include <aes_decryptor.h>

Inheritance diagram for shaka::media::AesCbcDecryptor:

Public Member Functions
	AesCbcDecryptor (CbcPaddingScheme padding_scheme)

	AesCbcDecryptor (CbcPaddingScheme padding_scheme, ConstantIvFlag constant_iv_flag)

AesCryptor implementation overrides.
bool	InitializeWithIv (const std::vector< uint8_t > &key, const std::vector< uint8_t > &iv) override

size_t	RequiredOutputSize (size_t plaintext_size) override

Public Member Functions inherited from shaka::media::AesCryptor
	AesCryptor (ConstantIvFlag constant_iv_flag)

bool	SetIv (const std::vector< uint8_t > &iv)

void	UpdateIv ()

const std::vector< uint8_t > &	iv () const

bool	use_constant_iv () const

bool	Crypt (const std::vector< uint8_t > &text, std::vector< uint8_t > *crypt_text)

bool	Crypt (const std::string &text, std::string *crypt_text)

bool	Crypt (const uint8_t text, size_t text_size, uint8_t crypt_text)

bool	Crypt (const uint8_t text, size_t text_size, uint8_t crypt_text, size_t *crypt_text_size)

Additional Inherited Members
Public Types inherited from shaka::media::AesCryptor
enum	ConstantIvFlag { kUseConstantIv , kDontUseConstantIv }

Static Public Member Functions inherited from shaka::media::AesCryptor
static bool	GenerateRandomIv (FourCC protection_scheme, std::vector< uint8_t > *iv)

Protected Types inherited from shaka::media::AesCryptor
enum	CipherMode { kCtrMode , kCbcMode }

Protected Member Functions inherited from shaka::media::AesCryptor
bool	SetupCipher (size_t key_size, CipherMode mode)

Protected Attributes inherited from shaka::media::AesCryptor
mbedtls_cipher_context_t	cipher_ctx_

Detailed Description

Class which implements AES-CBC (Cipher block chaining) decryption.

Definition at line 25 of file aes_decryptor.h.

Constructor & Destructor Documentation

◆ AesCbcDecryptor() [1/2]

shaka::media::AesCbcDecryptor::AesCbcDecryptor ( CbcPaddingScheme padding_scheme )

explicit

Creates a AesCbcDecryptor with continous cipher block chain across Crypt calls.

Parameters

padding_scheme indicates the padding scheme used. Currently supported schemes: kNoPadding, kPkcs5Padding, kCtsPadding.

Definition at line 19 of file aes_decryptor.cc.

◆ AesCbcDecryptor() [2/2]

shaka::media::AesCbcDecryptor::AesCbcDecryptor	(	CbcPaddingScheme	padding_scheme,
		ConstantIvFlag	constant_iv_flag
	)

Parameters

padding_scheme	indicates the padding scheme used. Currently supported schemes: kNoPadding, kPkcs5Padding, kCtsPadding.
constant_iv_flag	indicates whether a constant iv is used, kUseConstantIv means that the same iv is used for all Crypt calls until iv is changed via SetIv; otherwise, iv is updated internally and there is a continuous cipher block chain across Crypt calls util iv is changed explicitly via SetIv or UpdateIv functions.

Definition at line 22 of file aes_decryptor.cc.

◆ ~AesCbcDecryptor()

shaka::media::AesCbcDecryptor::~AesCbcDecryptor ( )

override

Definition at line 32 of file aes_decryptor.cc.

Member Function Documentation

◆ InitializeWithIv()

bool shaka::media::AesCbcDecryptor::InitializeWithIv	(	const std::vector< uint8_t > &	key,
		const std::vector< uint8_t > &	iv
	)

overridevirtual

Initialize the cryptor with specified key and IV.

Returns: true on successful initialization, false otherwise.

Implements shaka::media::AesCryptor.

Definition at line 34 of file aes_decryptor.cc.

◆ RequiredOutputSize()

size_t shaka::media::AesCbcDecryptor::RequiredOutputSize ( size_t plaintext_size )

overridevirtual

Reimplemented from shaka::media::AesCryptor.

Definition at line 50 of file aes_decryptor.cc.

The documentation for this class was generated from the following files:

packager/media/base/aes_decryptor.h
packager/media/base/aes_decryptor.cc

Public Member Functions

Additional Inherited Members