QCA::SecureArray Class Reference

#include <QtCrypto>

Inheritance diagram for QCA::SecureArray:

Public Member Functions
	SecureArray ()
	SecureArray (const char *str)
	SecureArray (const MemoryRegion &a)
	SecureArray (const QByteArray &a)
	SecureArray (const SecureArray &from)
	SecureArray (int size, char ch=0)
SecureArray &	append (const SecureArray &a)
char &	at (int index)
const char &	at (int index) const
void	clear ()
const char *	constData () const
char *	data ()
const char *	data () const
void	fill (char fillChar, int fillToPosition=-1)
bool	isEmpty () const
bool	operator!= (const MemoryRegion &other) const
SecureArray &	operator+= (const SecureArray &a)
SecureArray &	operator= (const QByteArray &a)
SecureArray &	operator= (const SecureArray &from)
bool	operator== (const MemoryRegion &other) const
char &	operator[] (int index)
const char &	operator[] (int index) const
bool	resize (int size)
int	size () const
QByteArray	toByteArray () const
Public Member Functions inherited from QCA::MemoryRegion
	MemoryRegion (const char *str)
	MemoryRegion (const MemoryRegion &from)
	MemoryRegion (const QByteArray &from)
const char &	at (int index) const
const char *	constData () const
const char *	data () const
bool	isEmpty () const
bool	isNull () const
bool	isSecure () const
MemoryRegion &	operator= (const MemoryRegion &from)
MemoryRegion &	operator= (const QByteArray &from)
int	size () const
QByteArray	toByteArray () const

Protected Member Functions
void	set (const QByteArray &from)
void	set (const SecureArray &from)
Protected Member Functions inherited from QCA::MemoryRegion
	MemoryRegion (bool secure)
	MemoryRegion (const QByteArray &from, bool secure)
	MemoryRegion (int size, bool secure)
char &	at (int index)
char *	data ()
bool	resize (int size)
void	set (const QByteArray &from, bool secure)
void	setSecure (bool secure)

Detailed Description

Secure array of bytes.

The SecureArray provides an array of memory from a pool that is, at least partly, secure. In this sense, secure means that the contents of the memory should not be made available to other applications. By comparison, a QByteArray or QString may be held in pages that might be swapped to disk or free'd without being cleared first.

Note that this class is implicitly shared (that is, copy on write).

Examples

aes-cmac.cpp, ciphertest.cpp, eventhandlerdemo.cpp, hashtest.cpp, keyloader.cpp, mactest.cpp, md5crypt.cpp, publickeyexample.cpp, randomtest.cpp, rsatest.cpp, and saslclient.cpp.

Definition at line 316 of file qca_tools.h.

Constructor & Destructor Documentation

SecureArray() [1/6]

QCA::SecureArray::SecureArray

(

)

Construct a secure byte array, zero length.

SecureArray() [2/6]

QCA::SecureArray::SecureArray ( int size, char ch = 0 )

explicit

Construct a secure byte array of the specified length.

Parameters

size	the number of bytes in the array
ch	the value every byte should be set to

SecureArray() [3/6]

QCA::SecureArray::SecureArray

(

const char *

str

)

Construct a secure byte array from a string.

Note that this copies, rather than references the source array.

Parameters

str	the source of the data (as a null terminated string).

SecureArray() [4/6]

QCA::SecureArray::SecureArray

(

const QByteArray &

a

)

Construct a secure byte array from a QByteArray.

Note that this copies, rather than references the source array.

Parameters

a	the source of the data.

See also

operator=()

SecureArray() [5/6]

QCA::SecureArray::SecureArray

(

const MemoryRegion &

a

)

Construct a secure byte array from a MemoryRegion.

Note that this copies, rather than references the source array

Parameters

a	the source of the data.

See also

operator=()

SecureArray() [6/6]

QCA::SecureArray::SecureArray

(

const SecureArray &

from

)

Construct a (shallow) copy of another secure byte array.

Parameters

from	the source of the data and length.

Member Function Documentation

append()

SecureArray & QCA::SecureArray::append

(

const SecureArray &

a

)

Append a secure byte array to the end of this array.

Parameters

a	the array to append to this array

Examples

ciphertest.cpp, and md5crypt.cpp.

at() [1/2]

char & QCA::SecureArray::at

(

int

index

)

Returns a reference to the byte at the index position.

Parameters

index

the zero-based offset to obtain

at() [2/2]

const char & QCA::SecureArray::at

(

int

index

)

const

Returns a reference to the byte at the index position.

Parameters

index

the zero-based offset to obtain

clear()

void QCA::SecureArray::clear

(

)

Clears the contents of the array and makes it empty.

constData()

const char * QCA::SecureArray::constData

(

)

const

Pointer to the data in the secure array.

You can use this for memcpy and similar functions. If you are trying to obtain data at a particular offset, you might be better off using at() or operator[]

data() [1/2]

char * QCA::SecureArray::data

(

)

Pointer to the data in the secure array.

You can use this for memcpy and similar functions. If you are trying to obtain data at a particular offset, you might be better off using at() or operator[]

Examples

ciphertest.cpp, hashtest.cpp, mactest.cpp, md5crypt.cpp, publickeyexample.cpp, and rsatest.cpp.

data() [2/2]

const char * QCA::SecureArray::data

(

)

const

Pointer to the data in the secure array.

You can use this for memcpy and similar functions. If you are trying to obtain data at a particular offset, you might be better off using at() or operator[]

fill()

void QCA::SecureArray::fill	(	char	fillChar,
		int	fillToPosition = -1 )

Fill the data array with a specified character.

Parameters

fillChar	the character to use as the fill
fillToPosition	the number of characters to fill to. If not specified (or -1), fills array to current length.

Note

This function does not extend the array - if you ask for fill beyond the current length, only the current length will be used.

The number of characters is 1 based, so if you ask for fill('x', 10), it will fill from

Examples

md5crypt.cpp.

isEmpty()

bool QCA::SecureArray::isEmpty

(

)

const

Test if the array contains any bytes.

This is equivalent to testing (size() != 0). Note that if the array is allocated, isEmpty() is false (even if no data has been added)

Returns

true if the array has zero length, otherwise false

Examples

rsatest.cpp.

operator!=()

bool QCA::SecureArray::operator!= ( const MemoryRegion & other ) const

inline

Inequality operator.

Returns true if both arrays have different length, or the same length but different data.

Parameters

other

the MemoryRegion to compare to

Definition at line 516 of file qca_tools.h.

operator+=()

SecureArray & QCA::SecureArray::operator+=

(

const SecureArray &

a

)

Append a secure byte array to the end of this array.

Parameters

a	the array to append to this array

operator=() [1/2]

SecureArray & QCA::SecureArray::operator=

(

const QByteArray &

a

)

Creates a copy, rather than references.

Parameters

a	the array to copy from

operator=() [2/2]

SecureArray & QCA::SecureArray::operator=

(

const SecureArray &

from

)

Creates a reference, rather than a deep copy.

Parameters

from	the array to reference

operator==()

bool QCA::SecureArray::operator==

(

const MemoryRegion &

other

)

const

Equality operator.

Returns true if both arrays have the same data (and the same length, of course).

Parameters

other

the MemoryRegion to compare to

operator[]() [1/2]

char & QCA::SecureArray::operator[]

(

int

index

)

Returns a reference to the byte at the index position.

Parameters

index

the zero-based offset to obtain

operator[]() [2/2]

const char & QCA::SecureArray::operator[]

(

int

index

)

const

Returns a reference to the byte at the index position.

Parameters

index

the zero-based offset to obtain

resize()

bool QCA::SecureArray::resize

(

int

size

)

Change the length of this array If the new length is less than the old length, the extra information is (safely) discarded.

If the new length is equal to or greater than the old length, the existing data is copied into the array.

Parameters

size	the new length

Examples

aes-cmac.cpp.

set() [1/2]

void QCA::SecureArray::set ( const QByteArray & from )

protected

Assign the contents of a provided byte array to this object.

Parameters

from	the byte array to copy

set() [2/2]

void QCA::SecureArray::set ( const SecureArray & from )

protected

Assign the contents of a provided byte array to this object.

Parameters

from	the byte array to copy

size()

int QCA::SecureArray::size

(

)

const

Returns the number of bytes in the array.

Examples

aes-cmac.cpp, and md5crypt.cpp.

toByteArray()

QByteArray QCA::SecureArray::toByteArray

(

)

const

Copy the contents of the secure array out to a standard QByteArray.

Note that this performs a deep copy of the data.

Examples

ciphertest.cpp, eventhandlerdemo.cpp, hashtest.cpp, mactest.cpp, md5crypt.cpp, and rsatest.cpp.

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

• qca_tools.h