65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
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// CallbackSslContext.h
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// Declares the cCallbackSslContext class representing a SSL context wrapper that uses callbacks to read and write SSL peer data
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#pragma once
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#include "SslContext.h"
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class cCallbackSslContext :
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public cSslContext
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{
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public:
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/** Interface used as a data sink for the SSL peer data. */
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class cDataCallbacks
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{
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public:
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// Force a virtual destructor in descendants:
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virtual ~cDataCallbacks() {}
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/** Called when PolarSSL wants to read encrypted data from the SSL peer.
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The returned value is the number of bytes received, or a PolarSSL error on failure.
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The implementation can return POLARSSL_ERR_NET_WANT_READ or POLARSSL_ERR_NET_WANT_WRITE to indicate
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that there's currently no more data and that there might be more data in the future. In such cases the
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SSL operation that invoked this call will terminate with the same return value, so that the owner is
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notified of this condition and can potentially restart the operation later on. */
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virtual int ReceiveEncrypted(unsigned char * a_Buffer, size_t a_NumBytes) = 0;
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/** Called when PolarSSL wants to write encrypted data to the SSL peer.
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The returned value is the number of bytes sent, or a PolarSSL error on failure.
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The implementation can return POLARSSL_ERR_NET_WANT_READ or POLARSSL_ERR_NET_WANT_WRITE to indicate
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that there's currently no more data and that there might be more data in the future. In such cases the
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SSL operation that invoked this call will terminate with the same return value, so that the owner is
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notified of this condition and can potentially restart the operation later on. */
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virtual int SendEncrypted(const unsigned char * a_Buffer, size_t a_NumBytes) = 0;
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} ;
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/** Creates a new SSL context with no callbacks assigned */
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cCallbackSslContext(void);
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/** Creates a new SSL context with the specified callbacks */
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cCallbackSslContext(cDataCallbacks & a_Callbacks);
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protected:
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/** The callbacks to use to send and receive SSL peer data */
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cDataCallbacks * m_Callbacks;
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// cSslContext overrides:
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virtual int ReceiveEncrypted(unsigned char * a_Buffer, size_t a_NumBytes) override;
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virtual int SendEncrypted(const unsigned char * a_Buffer, size_t a_NumBytes) override;
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};
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