namespace Akenti class Provider : public ref_ptr

A Provider object is a reference-count pointer that wraps a ProviderImpl object

Inheritance:

Public Methods

Provider (ProviderImpl* impl = NULL)
Constructs a Provider given a ProviderImpl object
~Provider ()
Destroys this object
static void setProvider (const Provider& provider)
Installs a Provider
static Provider& getProvider ()
Returns the installed provider

Inherited from ref_ptr:

Public Methods

ref_ptr & operator=(const ref_ptr& rhs)
T* operator->() const
operator void*() const
T* get() const

Documentation

A Provider object is a reference-count pointer that wraps a ProviderImpl object. It provides applications, albeit indirectly, with objects that implement security algorithms such as MessageDigest, Base64encoding and Signature. At start-up a Provider is instantiated from a selected ProviderImpl, e.g. OpenSSLProviderImpl, and installed as the single static provider. Any attempt to reinstall a provider will fail. As a result, the code can call static methods to perform various security algorithms, but there is still some flexibilty as to what implementations to use for these algorithms.
Provider(ProviderImpl* impl = NULL)
Constructs a Provider given a ProviderImpl object. Typically, an application installs a provider at start-up using the the setProvider(Provider&) method. Clients need never hold a reference to this installed provider. The static getProvider() method can be used to get a reference to the installed provider.
Parameters:
impl - wrapped ProviderImpl object
See Also:
ref_ptr
ProviderImpl
setProvider(Provider&)
getProvider()

~Provider()
Destroys this object.
See Also:
ref_ptr

static void setProvider(const Provider& provider)
Installs a Provider. This can only be called once in the lifetime of a program. Usually, this call should be made at start-up.
Throws:
SecurityException if a provider is already installed
Parameters:
provider - the provider to be installed.

static Provider& getProvider()
Returns the installed provider.This call will fail if a provider has not been installed.
Throws:
Error if no provider has been installed
Returns:
the pre-installed provider
See Also:
setProvider(Provider&)

This class has no child classes.
Author:
Srilekha Mudumbai Abdelilah Essiari
Version:
1.1 00/05/01
See Also:
ref_ptr
ProviderImpl
MessageDigest
Signature
KeyFactory
CertificateFactory
SecurityException
Error

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