#include <AES128Stream.h>

Inheritance diagram for ibrcommon::AES128Stream:

Collaboration diagram for ibrcommon::AES128Stream:

Public Member Functions
	AES128Stream (const CipherMode mode, std::ostream &output, const unsigned char key[key_size_in_bytes], const uint32_t salt)

	AES128Stream (const CipherMode mode, std::ostream &output, const unsigned char key[key_size_in_bytes], const uint32_t salt, const unsigned char iv[iv_len])

virtual	~AES128Stream ()

void	getIV (unsigned char(&to_iv)[iv_len]) const

void	getTag (unsigned char(&to_tag)[tag_len])

bool	verify (const unsigned char(&verify_tag)[tag_len])

Public Member Functions inherited from ibrcommon::CipherStream
	CipherStream (std::ostream &stream, const CipherMode mode=CIPHER_DECRYPT, const size_t buffer=2048)

virtual	~CipherStream ()

void	encrypt (std::iostream &stream)

void	decrypt (std::iostream &stream)

Static Public Attributes
static const size_t	key_size_in_bytes = 16

static const size_t	salt_len = sizeof(uint32_t)

static const size_t	iv_len = 8

static const size_t	tag_len = 16

static const size_t	BUFF_SIZE = 2048

Protected Member Functions
virtual void	encrypt (char *buf, const size_t size)

virtual void	decrypt (char *buf, const size_t size)

Protected Member Functions inherited from ibrcommon::CipherStream
virtual void	encrypt_final ()

virtual void	decrypt_final ()

virtual int	sync ()

virtual std::char_traits< char > ::int_type	overflow (std::char_traits< char >::int_type=std::char_traits< char >::eof())

Additional Inherited Members
Public Types inherited from ibrcommon::CipherStream
enum	CipherMode { CIPHER_ENCRYPT = 0, CIPHER_DECRYPT = 1 }

Protected Attributes inherited from ibrcommon::CipherStream
CipherMode	_mode

Detailed Description

Encrypts or decrypts an input stream using AES with a 128bit key using galois counter mode. In encryption mode initialisation vector and tag will be created and can be read with getIV() and getTag(). In decryption mode initialisation vector and tag have to be set at construction or via the decrypt()-Method. TODO test the gcm_iv structure on be and le systems

Definition at line 42 of file AES128Stream.h.

Constructor & Destructor Documentation

ibrcommon::AES128Stream::AES128Stream	(	const CipherMode	mode,
		std::ostream &	output,
		const unsigned char	key[key_size_in_bytes],
		const uint32_t	salt
	)

Creates a AES128Stream object, either for encrypting or decrypting, which is controlled by mode. If this object is used for decryption iv and tag have to be set.

Parameters

mode	tell the constructor wether this will be used for en- or decryption
output	the stream in which will the cipher- or plaintext be serialized into
key	the AES128 key to use. Its size is key_size_in_bytes.
salt	the salt, which shall be the same for all data which belongs together
iv	if used for decryption, this is the initialisation vector, which was created at encryption. The size of this array is iv_len.
tag	if used for decryption, this is the authentication tag, which was created at encryption. The size of this array is tag_len.

Definition at line 29 of file AES128Stream.cpp.

References ibrcommon::LogLevel::critical, gcm_init_and_key(), gcm_init_message(), IBRCOMMON_LOGGER_ENDL, IBRCOMMON_LOGGER_TAG, and iv_len.

Here is the call graph for this function:

ibrcommon::AES128Stream::AES128Stream	(	const CipherMode	mode,
		std::ostream &	output,
		const unsigned char	key[key_size_in_bytes],
		const uint32_t	salt,
		const unsigned char	iv[iv_len]
	)